TWI787641B - Hair retainer, method for its manufacture and use of cylindrical body as hair retainer - Google Patents

Abstract

The hair holder (1) of the present invention includes a cylindrical body (2) configured to allow a hair bundle (H) to be inserted from an opening (1a) at one end to an opening (1b) at the other end. The hair holder (1) has a longitudinal direction (X) and a width direction (Y). A hair holder (1) is configured to be wound up in a longitudinal direction (X), and has a first sheet (21) positioned inside and a second sheet (22) positioned outside during winding. One or both of the two sheets (21, 22) satisfy at least one of the following conditions (1) and (2). (1) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 50 MPa or more. (2) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is 19.2 MPa or more.

Description

Hair retainer, method for its manufacture and use of cylindrical body as hair retainer

The present invention relates to a hair retainer, its manufacturing method and hair treatment method using it.

There is known a hair holder for imparting a curly shape to hair bundles. The present applicant has previously proposed a hair holder including a cylindrical body configured to allow insertion of a hair bundle (Patent Document 1).

As a technique different from the hair retainer, Patent Document 2 discloses that, for a polyester film, if the storage modulus of dynamic viscoelasticity measured under predetermined conditions is greater than a predetermined value, good heat resistance can be obtained.

Also, the present applicant proposed a hair holder in which a reinforcing member is provided in a cylindrical body into which a hair bundle is inserted (Patent Document 3).

As a technology different from the hair retainer, Patent Document 4 discloses that if the crystallinity is increased by heating amorphous polyethylene terephthalate with a low crystallinity with superheated steam, the heat resistance will be improved. .

prior art literature patent documents

Patent Document 1: International Publication No. 2019/131734

Patent Document 2: Specification of US Patent Application Publication No. 2018/044507

Patent Document 3: Japanese Patent Laid-Open No. 2005-246040

Patent Document 4: Japanese Patent Laid-Open No. 2012-245700

The present invention relates to a hair holder comprising a cylindrical body configured to allow a hair bundle to be inserted from an opening at one end toward an opening at the other end, and having a longitudinal direction and a width direction perpendicular to the longitudinal direction. In one embodiment, the hair holder is preferably configured to be able to be wound up in the aforementioned longitudinal direction. In one embodiment, the hair holder preferably has a first sheet located inside and a second sheet located outside when it is rolled up. In the hair holder of the present invention, one or both of the first sheet and the second sheet preferably satisfy at least one of the following conditions (1) and (2). (1) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 50 MPa or more. (2) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is 19.2 MPa or more.

Also, the present invention relates to a method of manufacturing a hair holder comprising a cylindrical body configured to insert a bundle of hair from an opening at one end toward an opening at the other end and in a coiled state. In one embodiment, the hair holder preferably has a first sheet located inside and a second sheet located outside in a rolled state, and one or both of the first sheet and the second sheet The sheet contains a polyester-based nonwoven fabric. In one embodiment, the method of manufacturing the hair holder preferably includes a winding step of winding the above-mentioned hair holder. In one embodiment, the method of manufacturing the hair holder preferably includes a heating step of applying heat of 120° C. or higher while maintaining the hair holder in the coiled state.

Moreover, this invention is a hair treatment method using the said hair holder. In one embodiment, in the hair treatment method, it is preferable to wind up the hair holder after inserting the hair bundle into the hair holder. In one embodiment, the hair treatment method preferably includes heating the hair bundle to 80° C. or higher while maintaining the coiled state of the hair holder.

Other features of the present invention will be apparent from the claims and the following description.

When an upper limit or a lower limit or upper and lower limits of a numerical value are specified in this specification, the values of the upper limit and the lower limit themselves are also included. In addition, even if not specifically stated, it can be construed as describing all numerical values or numerical ranges below the upper limit value of the numerical value, above the lower limit value, or within the range of the upper and lower limit values. In this specification, "a" and "an" can be interpreted as meaning "one or more". It is understood that various modifications and changes of the present invention can be realized by referring to the above disclosure and the following disclosure in this specification. Therefore, it should be understood that embodiments not explicitly described in this specification can also be implemented in the present invention within the technical scope based on the description of the claims. Regarding the description contents of the above-mentioned patent documents, the entire contents thereof are incorporated in this specification as a part of the contents of this specification.

In order to impart a strong curly shape to the hair bundle, heating may be performed while maintaining the curled state of the hair holder. The hair holder described in Patent Document 1 does not assume heating while maintaining the curled state of the hair holder. In this document, there is no description that the hair holding device can be used stably in the temperature range (100°C to 150°C) used for heating styling.

Patent Document 2 discloses a polyester film used for an electrical insulating sheet, an adhesive sheet, etc., and its technical field is different from that of a hair holder. This document discloses the storage modulus of dynamic viscoelasticity measured at 100°C, but does not disclose the storage modulus measured at 150°C. In the field of polymer materials, it is known that the physical properties of the resin will change at the glass transition point and melting point of the resin. Assuming that there are glass transition points and melting points between 100°C and 150°C, the physical properties of the resin will change rapidly, so It cannot necessarily be said that the storage modulus at 100°C has a proportional relationship with the storage modulus at 150°C. In this document, there is no description or suggestion of any problems or solutions unique to hair maintenance used in styling by applying heat of 100° C. or higher. Also, this document discloses that polyester is used for a film, but does not disclose that polyester is used for a nonwoven fabric.

The hair holder described in Patent Document 3 does not assume heating while maintaining the curled state of the hair holder. The hair holder described in this document is concerned with the coiling force of the spontaneous hair holder, and it is not assumed that the hair holder is heated while maintaining the curled state of the hair holder. In this document, there is no description of applying heat at a predetermined temperature or higher regarding a method of manufacturing a hair holder.

Patent Document 4 describes a heat-resistant transparent container made of amorphous polyethylene terephthalate, and its technical field is different from that of the hair holder. The amorphous polyethylene terephthalate sheet described in this document is not used directly in the form of a sheet, but is used after being heated and completely melted to make a container, and its technical field is different from that of a hair holder. . This document describes that the container described in this document exhibits transparency and heat resistance by stretching the above-mentioned sheet and heating it to 130° C. to 200° C. and then heat-fixing it. In the field of polymer materials, it is known that when a transparent polymer film is stretched, fibrils and voids aligned along the stress direction are generated inside the film, and the refractive index of the produced part is different from that of other parts, causing deformation. White Crack. The technology described in Patent Document 4 is considered to suppress cracks. However, in this document, there is neither description nor suggestion at all about the problem unique to the hair holding device provided with the nonwoven fabric-containing sheet. Since the sheet constituting the hair holder of the present invention is a nonwoven fabric, transparency is not required. Also, in this document, there is no description or suggestion about maintaining a unique curling effect on hair that imparts a strong curly shape to hair bundles.

The present invention relates to a hair holder capable of maintaining the coiled state even when heated while maintaining the coiled state of the hair holder, and a hair treatment method using the hair holder. Moreover, this invention relates to the manufacturing method of such a hair holder.

Hereinafter, the hair holder of the present invention will be described based on preferred embodiments thereof with reference to the drawings. The hair holder of the present invention is used to impart a curly shape to hair bundles. The hair retainer of the present invention is mainly used for the treatment of human hair.

Fig. 1(a) and (b) show one embodiment of the hair holder of the present invention. The hair holder 1 shown in FIGS. 1( a ) and ( b ) includes a cylindrical body 2 configured to allow a hair bundle H to be inserted from an opening 1 a at one end to an opening 1 b at the other end. The hair holder 1 has a longitudinal direction X and a width direction Y perpendicular to the longitudinal direction X. Typically, the hair holder 1 has a first sheet 21 and a second sheet 22 which are two sheets forming the outer surface of the hair holder 1 . The two sheets 21 and 22 are longer in the longitudinal direction X. Typically, the hair holder 1 has a flat shape in which such two sheet materials 21 and 22 are laminated. The first sheet 21 is positioned inside when the hair holder 1 is wound up. On the other hand, the second sheet 22 is positioned outside when being wound up.

The hair holder 1 has: a pair of side joints 24, 24 formed by joining the first sheet 21 and the second sheet 22; and a cylindrical portion 26 located at the pair of side joints. Department 24, Room 24. A pair of side joining portions 24, 24 are formed at side edge portions of the hair holder 1 along the longitudinal direction X. As shown in FIG. In the cylindrical part 26, the hair bundle H is inserted in the longitudinal direction X between the opening part 1a of one end and the opening part 1b of the other end. The longitudinal direction X of the hair holder 1 corresponds to the insertion direction of the hair bundle H. As shown in FIG. From the standpoint of preventing detachment from the joint even when heating is applied during hair treatment, the side joints 24, 24 are preferably formed by sewing such as sutures with stronger joint strength than fusion such as heat sealing.

In the embodiment shown in Fig. 1(a) and (b), both side edges along the longitudinal direction X of the hair holder 1 are parallel to each other. Alternatively, the side edges may not be parallel to each other. In this case, it is preferable that the width of the above-mentioned both side edges gradually increases from the opening 1 a at one end toward the opening 1 b at the other end. That is, the hair holder 1 preferably has a fan-shaped shape from the opening 1a at one end toward the opening 1b at the other end in plan view.

The hair holder 1 is preferably configured so that it can be wound up in the longitudinal direction X. The hair holder 1 is preferably formed in a self-rolling manner. Alternatively, the hair holder 1 may be manually rolled up. As the configuration of automatic winding, for example, the following configuration can be cited: In the state where tension is not applied to the hair holder 1 in the longitudinal direction X, the hair holder 1 is wound, and after the hair holder 1 is stretched and inserted into the hair bundle, When the stretched state is released, the hair holder 1 is spontaneously coiled together with the hair bundle. Such a configuration can be achieved by making either or both of the two sheets 21, 22 constituting the hair holder 1 include a shape-memory sheet memorizing the state of the hair holder 1 rolled up. The shape-memory sheet includes, for example, lamination of films having different thermal shrinkage rates.

As shown in Fig. 1(a) and (b), the hair holder 1 has an extension portion 4 on the side of the opening 1a where the first sheet 21 extends outward in the longitudinal direction X from the cylindrical body 2. The extension portion 4 is integrally formed with the first sheet 21 . If the hair holder 1 has the extending portion 4 , the hair bundle can be inserted into the cylindrical portion 26 more easily. The extension portion 4 may also be formed of a sheet different from the first sheet 21 . In addition, the hair holder 1 does not need to have an extension part.

The hair holder 1 preferably has a fixing member 5 that holds the curled state. The fixing member 5 is preferably disposed on the outer surface of the extending portion 4 . The fixing member 5 is preferably detachably engaged with the outer surface of the second sheet 22 . The fixing member 5 is disposed on the hair bundle holder 3 so as to face a part of the outer surface of the second sheet 22, and is bonded to the part of the outer surface. Thereby, the hair holder 1 can be maintained in the form of the hair bundle holder 3 . As a fixing member, a sheet engaging member, a coupling member, etc. are mentioned. Examples of the sheet engaging member include hooks, male members of mechanical fasteners, and the like. As the coupling member, a magnet, an adherend selective adhesive tape that is bonded only to a specific substance, and the like may be mentioned.

After the hair bundle 1 is inserted from the opening 1a toward the opening 1b, the hair holder 1 is wound together with the hair bundle to complete the winding state. Hereinafter, the state in which the hair holder 1 is rolled up is also referred to as the hair bundle holder 3 . FIG. 2 shows an example of the hair bundle holder 3 . In the hair bundle holder 3 shown in the figure, the opening 1b is located on the central axis C side. Curl can be imparted to the hair bundle by applying heat to the hair bundle in the state shown in the figure. The inventors of the present invention have intensively studied a method for maintaining the coiled state of the hair holder even if it is heated while maintaining the coiled state. As a result, it was found that, as one or both of the two sheets 21, 22, a sheet containing a polyester nonwoven fabric and having a storage modulus E' of dynamic viscoelasticity of a predetermined value or more was used, thereby even Heating can also maintain the shape of the hair bundle holder 3 . Polyester begins to soften as the temperature rises and the storage modulus E' decreases. At this time, the storage modulus E' is increased by performing heat treatment in advance to improve the heat resistance, which can suppress the deformation of the polyester non-woven fabric and maintain the hair bundle when heated. The coiled state of body 3. The storage modulus E' is a physical property value representing elastic properties. The greater the storage modulus E' at high temperature, the more the polyester maintains the glass state and does not change into a viscoelastic state, so the polyester non-woven fabric can maintain its shape. That is, the polyester nonwoven fabric can maintain its wound state. Due to the high storage modulus E', the polyester non-woven fabric can maintain its coiled state even if it is heated. Therefore, even if the polyester non-woven fabric is cooled in this state, it can also remember the hair while maintaining the coiled state. The shape of the bundle holder 3. Therefore, it can maintain the shape suitable for curling hair even after one use. Furthermore, it was found that the sheet has excellent durability and can be used repeatedly. In the present invention, a sheet satisfying such conditions is used for one or both of the two sheets 21 and 22 .

From the viewpoint of making the above-mentioned effect more remarkable, it is preferable that one of the first sheet 21 and the second sheet 22 satisfies the following conditions of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz. A sheet of at least one of the numerical range of the storage modulus E' and the numerical range of the storage modulus E' measured at 150°C and a frequency of 1 Hz. More preferably, the two sheets 21 and 22 all satisfy the following value range of the storage modulus E' measured at 100°C and a frequency of 1 Hz (hereinafter, also referred to as "condition (1)"), and at 150 Sheets within the value range of the storage modulus E' measured at ℃ and a frequency of 1 Hz (hereinafter, also referred to as "condition (2)"). The reason why the storage modulus E' is specified at 100°C and 150°C is that the temperature range used in heat setting treatment is generally 100°C to 150°C, so in order to stably use the hair retainer of the present invention in this temperature range , it is considered appropriate to specify the storage modulus E' at 100°C and 150°C. In the hair holder of the present invention, the high storage modulus E' of the sheet constituting it contributes to the following two aspects: (i) Even if the hair holder is kept in the coiled state while heating, the coiled state can be maintained. state; and (ii) the hair retainer can be used repeatedly. From the viewpoint of maintaining the coiled state at a relatively high temperature with strong curling, it is more preferable that the first sheet 21 satisfies the following storage mode measured at 150°C and a frequency of 1 Hz. Sheets in the numerical range of the number E'. From the viewpoint of maintaining the coiled state well at a relatively low temperature in consideration of the burden on the hair, it is more preferable that the second sheet 22 satisfies the following conditions measured at 100°C and a frequency of 1 Hz. Store sheets for the value range of modulus E'. Among the first sheet 21 and the second sheet 22, it is preferable that at least the first sheet 21 on the inner side satisfies both the condition (1) and the condition (2), more preferably two sheets 21 , 22 each satisfy both the condition (1) and the condition (2).

From the point of view of maintaining the coiled state well at a relatively low temperature in consideration of the burden on the hair, under the condition (1), the storage modulus E' of dynamic viscoelasticity is at 100°C and a frequency of 1 Hz. Under these conditions, it is preferably at least 50 MPa, more preferably at least 70 MPa, and still more preferably at least 90 MPa. Under condition (1), from the viewpoint of heat resistance, the higher the upper limit of the storage modulus E' measured at 100°C and a frequency of 1 Hz, the better, but from the viewpoint of flexibility, it is more preferable It is 200 MPa or less, more preferably 100 MPa or less, still more preferably 96.5 MPa or less. Under condition (1), the storage modulus E' measured at 100°C and a frequency of 1 Hz is preferably from 50 MPa to 200 MPa, more preferably from 70 MPa to 200 MPa, and more preferably from 90 MPa to 200 MPa Below MPa. Also, from the point of view of maintaining the coiled state at a relatively high temperature with strong curling, under the condition (2), the storage modulus E' of dynamic viscoelasticity is at 150°C and the frequency is 1 Hz. The pressure is preferably at least 19.2 MPa, more preferably at least 20 MPa, still more preferably at least 30 MPa, particularly preferably at least 35 MPa, and even more preferably at least 40 MPa. Under condition (2), from the viewpoint of heat resistance, the higher the upper limit of the storage modulus E' measured at 150°C and a frequency of 1 Hz, the better, but from the viewpoint of flexibility, it is more preferable It is 80 MPa or less, more preferably 50 MPa or less, still more preferably 45 MPa or less. Under the condition (2), the storage modulus E' measured at 150°C and a frequency of 1 Hz is preferably not less than 19.2 MPa and not more than 80 MPa, more preferably not less than 20 MPa and not more than 80 MPa, and still more preferably not less than 30 MPa and not more than 80 MPa or less, more preferably 40 MPa or more and 80 MPa or less. The storage modulus E' under the conditions (1) and (2) was measured by the following method. The reason for setting the measurement temperature of the storage modulus E' to 100°C or 150°C depends on the measurement result that when hair treatment is performed while heating the hair holder with a styling stick equipped with an electric heater inside, the When the set temperature that can be generally used is set to 150°C, the temperature of the sheet forming the innermost surface of the hair holder 1, that is, the surface that is in contact with the styling rod equipped with an electric heater inside (about 150°C) and Results obtained for the temperature of the sheet forming the outermost surface (about 100°C).

[Determination method of storage modulus E' of dynamic viscoelasticity] A dynamic viscoelastic device ("DMS6100" manufactured by Seiko Instruments Nanotechnology Co., Ltd.) was used. Short samples with a width of 10 mm and a length of 20 mm were cut out from the first sheet 21 and the second sheet 22, respectively. The short strip samples were raised from 20°C to 300°C at a rate of 10°C for 1 minute at a frequency of 1 Hz, measured in tensile mode, and the storage modulus E' at 100°C and 150°C was obtained.

One of the two sheets 21 and 22 may consist of only polyester nonwoven fabric, or may contain polyester nonwoven fabric and nonwoven fabric containing other polymer fibers. From the viewpoint of easy maintenance of the coiled state and the adjustment of the heating temperature in the coiling step, it is preferable that both of the two sheets 21 and 22 are composed of only polyester nonwoven fabric.

The so-called polyester non-woven fabrics include polyester fibers with esters of aromatic dicarboxylic acids and saturated aliphatic alcohols as repeating units. Such polyesters include, for example, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate. Diester etc. These fibers may be used alone or in combination of two or more. Also, conjugate fibers containing two or more of these polyesters can also be used. Among them, a nonwoven fabric having fibers containing polyethylene terephthalate can be preferably used from the viewpoint of excellent heat resistance. The polyester-based nonwoven fabric may consist of only polyester fibers, or may contain polyester fibers and fibers containing other polymers. Preferably, the polyester-based nonwoven fabric is composed of only polyester fibers. When the polyester-based nonwoven fabric has polyethylene terephthalate-containing fibers, it is more preferable that the polyethylene terephthalate-containing fibers contain an amorphous part. Thereby, further heat resistance and flexibility can be imparted to the hair bundle holder 3 . Whether or not an amorphous part is included can be confirmed by the following method. The so-called amorphous portion refers to the portion where the orientation or spacing of the polymer is uneven.

[How to check whether there is an amorphous part] A differential scanning calorimeter "PYRIS Diamond DSC" manufactured by PerkinElmer was used. A 6.9 mg sample was taken out from the hair holder. After putting the sample into an aluminum closed cell, the cell was placed in the device holder, and the heat was measured by raising it from 25°C to 300°C at a rate of 10°C for 1 minute. In addition, it is known that the glass transition point causes a change in heat with temperature rise. Therefore, the presence or absence of a glass transition point is judged by this heat change, and the presence or absence of an amorphous part is evaluated. The glass transition point is a physical property unique to the amorphous part of the resin. It is generally observed with amorphous polyester, but when there is an amorphous part, it can also be observed with crystalline polyester.

Whether or not one of the two sheets 21 and 22 contains a nonwoven fabric can be judged by observation with a microscope. Whether or not the fibers used in the nonwoven fabric are polyester fibers can be analyzed by performing infrared absorption spectrometry using FT-IR. The type of polyester fiber can be identified by nuclear magnetic resonance method or pyrolysis product analysis, and it is determined according to the method described in the following books. Toshinori Ando and 1 other, "Research on Analytical Methods of Polytrimethylene Terephthalate", Tariff Central Analytical Institute Report No. 59, Ministry of Finance Central Tariff Analytical Institute, December 2019 issue, p.119-126 , internet[number 1]

From the viewpoint of imparting further heat resistance and flexibility to the hair bundle holder 3, among the two sheets 21 and 22, one sheet is preferably in the range of 125°C to 1700°C by differential scanning calorimetry. No exothermic peak was observed. From the viewpoint of imparting heat resistance, it is preferable that the exothermic peak is not observed in a range of preferably 110°C or higher, more preferably 100°C or higher. Moreover, from the viewpoint of imparting flexibility, it is more preferable that the exothermic peak is not observed in the range of preferably 200°C or lower, more preferably 300°C or lower. From the viewpoint of imparting heat resistance and flexibility, it is more preferable that both sheets 21 and 22 do not observe the above-mentioned exothermic peak within the above-mentioned range. When crystallization of polyester resin can occur in this temperature range, no exothermic peak will be observed in this temperature range, which means that the degree of crystallization of polyester is relatively high. The exothermic peak was measured by the following method.

From the viewpoint of imparting further heat resistance and flexibility to the hair bundle holder 3, among the two sheets 21, 22, one sheet is preferably in the range of 100°C to 220°C by differential scanning calorimetry. An endothermic peak was observed. From the viewpoint of imparting heat resistance, the endothermic peak is preferably observed in a range of preferably 145°C or higher, more preferably 170°C or higher, further preferably 180°C or higher. From the viewpoint of imparting heat resistance and flexibility, it is more preferable that both sheets 21 and 22 observe the above-mentioned endothermic peak within the above-mentioned range. The endothermic peak is caused by the thermal history of the polyester resin. Endothermic peak From the viewpoint of imparting heat resistance and flexibility, the endothermic heat calculated from the area of the endothermic curve in the range of 100°C to 220°C is preferably 0.1 J/g to 10 J/g, more preferably 0.5 J/g to 5 J/g. In particular, the endothermic peak is preferably from 0.1 J/g to 10 J/g, more preferably 0.1 J/g to 10 J/g, from the viewpoint of imparting heat resistance and flexibility. 0.5 J/g or more and 5 J/g or less. The endothermic peak was measured by the following method.

[Determination method of heating peak and endothermic peak] A differential scanning calorimeter "PYRIS Diamond DSC" manufactured by PerkinElmer was used. A 6.9 mg sample was taken out from the hair holder. After putting the sample into an aluminum closed cell, the cell was placed in the device holder, and the heat was measured by raising it from 25°C to 300°C at a rate of 10°C for 1 minute.

The polyester-based nonwoven fabric preferably has an embossed portion that fixes its constituent fibers to each other in a part thereof. If the embossed portion is provided, not only the hair holder 1 in a non-heated state, but also the hair holder 1 in a heated state can exert the effect of suppressing the amount of deformation when an external force is applied. Examples of the nonwoven fabric having an embossed portion include a spunbond nonwoven fabric obtained by a spunbond method, or a nonwoven fabric embossed using an embossing roll. The basis weight of the polyester-based nonwoven fabric is preferably 50 g/ ^m2 or more, more preferably 70 g, from the viewpoint of maintaining the rigidity as a hair retainer and improving the liquid absorption of the styling agent. /m ² or more, more preferably 90 g/m ² or more. Also, from the viewpoint of making the coilability good on the one hand and making the permeability of the styling liquid good on the one hand, the basis weight is preferably 300 g/m or less, more preferably ^{200 g/m 2 or} less, and even more preferably Preferably less than 150 g/m ² . The basis weight is preferably from 50 g/m ² to 300 g/m ² , more preferably from 70 g/m ² to 200 g/m ² , still more preferably from 90 g/m ² to 150 g/m ² the following. The shape of the embossed portion in plan view is not particularly limited, and examples thereof include a circular shape, a polygonal shape, and an elliptical shape. The area per one embossed portion is preferably at least 0.01 mm ² , more preferably at least 0.1 mm ² , and still more preferably at least 0.8 mm ² from the viewpoint of improving the permeability of the setting agent. Also, from the viewpoint of improving the liquid absorption of the setting agent, the area is preferably 5 mm ² or less, more preferably 2 mm ² or less, and still more preferably 1 mm ² or less. The area is preferably from 0.01 mm ² to 5 mm ² , more preferably from 0.1 mm ² to 2 mm ² , still more preferably from 0.8 mm ² to 1 mm ² . The embossing rate, which is the ratio of the total area of the multiple embossed parts occupied in the range of 10 mm x 10 mm of the nonwoven fabric, is preferably 10 from the viewpoint of improving the permeability of the setting agent. % or more, more preferably 15% or more, further preferably 25% or more. Also, from the viewpoint of improving the liquid absorption of the setting agent, the embossing ratio is preferably 50% or less, more preferably 35% or less. The embossing rate is preferably not less than 10% and not more than 50%, more preferably not less than 15% and not more than 35%, and still more preferably not less than 25% and not more than 35%.

The size and the like of the hair holder 1 can be appropriately determined according to the length of the hair, the part where the curly shape is to be formed, and the amount of the hair bundle to be inserted, and is preferably within the following range.

The length L1 of the hair holder 1 in the longitudinal direction X (refer to FIG. 1(b)) is preferably 50 mm or more, more preferably 100 mm, from the viewpoint of holding the hair bundle and surely curling the hair bundle. mm or more. The length L1 is preferably 400 mm or less, more preferably 350 mm or less, from the viewpoint of facilitating insertion of the hair bundle into the cylindrical body. The length L1 is preferably from 50 mm to 400 mm, more preferably from 100 mm to 350 mm. The length L1 of the hair holder 1 in the longitudinal direction X is the total length of the extending portion 4 and the cylindrical body 2 in the longitudinal direction X. The length L2 of the cylindrical body 2 in the longitudinal direction X (see FIG. 1(b)) is preferably 45 mm or more, more preferably 90 mm, from the viewpoint of maintaining the hair bundle and curling the hair bundle reliably. mm or more. The length L2 is preferably 300 mm or less, more preferably 275 mm or less, from the viewpoint of facilitating insertion of the hair bundle into the cylindrical body. The length L2 is preferably from 45 mm to 300 mm, more preferably from 90 mm to 275 mm.

Regarding the length W1 of the hair holder 1 in the width direction Y (refer to FIG. 1(b)), it is preferably 25 mm or more, more preferably 30 mm, from the viewpoint of easy insertion of the hair bundle into the cylindrical body. mm or more. The length W1 is preferably 200 mm or less, more preferably 150 mm or less, from the viewpoint of suppressing the hair bundle from spreading inside the cylindrical body and performing uniform curling. The length W1 is preferably from 25 mm to 200 mm, more preferably from 30 mm to 150 mm.

The length W2 of the opening 1b at the other end in the width direction Y (refer to FIG. 1(b)) is preferably 10 mm or more, more preferably from the viewpoint of making it easier to insert the hair bundle into the cylindrical body. more than 20 mm. The length W2 is preferably 195 mm or less, more preferably 145 mm or less, from the viewpoint of suppressing hair bundles from spreading inside the cylindrical body and performing uniform curling. The length W2 is preferably from 10 mm to 195 mm, more preferably from 20 mm to 145 mm.

The outer diameter D of the hair bundle holder 3 (see FIG. 2 ) is not particularly limited, and can be appropriately set according to the amount of hair bundles or the length of hair bundles. From the viewpoint of workability at the time of coiling, the outer diameter D is preferably at least 10 mm, more preferably at least 15 mm. The outer diameter D is preferably 60 mm or less, more preferably 50 mm or less, from the viewpoint of imparting a curl shape to the hair bundle favorably. The outer diameter D is preferably from 10 mm to 60 mm, more preferably from 15 mm to 50 mm. The outer diameter D is the maximum length of the radial section of the hair holder 1 wound into a roll shape and perpendicular to the direction of the central axis. The maximum length is measured in the roll-shaped cylindrical body 2, so that the cylindrical bodies 2 are in contact with each other without overlapping, and the warped part is removed.

In the case of using a hair treatment agent for imparting a curly shape to the hair bundle H, the hair treatment agent is not particularly limited, and any commercially available setting agent or the like can be used. Styling agents generally include the first agent containing reducing substances such as thioglycolate and cysteine, and the second agent containing oxidizing substances such as bromate and hydrogen peroxide.

Next, the manufacturing method of the hair holder of this invention is demonstrated. First, two rectangular sheets are prepared. Of the two sheets, one or both sheets are preferably polyester-based nonwoven fabrics. Next, it is preferable to place another sheet on one sheet and overlap the two sheets so that the side portions in the longitudinal direction of the two sheets are integrated with each other. Next, it is preferable to have a winding step (hereinafter, also referred to as "the first step") of winding the integrated two sheets. Then, it is preferable to have a heating step (hereinafter also referred to as "the second step") of performing heat treatment under the following conditions while maintaining the coiled state.

From the viewpoint of imparting a storage modulus E' of 50 MPa or higher at 100°C and a frequency of 1 Hz, in the second step, it is preferable to apply heat of 120°C or higher while maintaining the above-mentioned coiled state. Preferably, heat of 140°C or higher is applied.

Also, from the viewpoint of imparting a storage modulus E' of 19.2 MPa or higher at 150°C and a frequency of 1 Hz, in the second step, it is preferable to apply heat of 160°C or higher while maintaining the coiled state. , more preferably applying heat above 180°C.

The heat applied in the second step is preferably 300°C or lower, more preferably 250°C or lower, from the viewpoint of performing heat treatment without melting or thermally deforming the polyester-based nonwoven fabric.

The heat application in the second step may be performed in a dry state, or a method of immersing in an oil bath may be used. Furthermore, when heating with an oil bath, the oil needs to be removed after heating. From this viewpoint, it is preferable to apply heat to the hair holder in the coiled state using superheated steam heated to a boiling point or higher. If superheated steam is used, the heating time is faster than that in dry state, and the productivity is improved compared with oil bath heating. On the other hand, heating in a dry state is superior to heating with an oil bath or superheated steam from the standpoint of good workability due to the need for removing oil, water, etc. after heating. Superheated steam is typically superheated steam. In the case of heating with an oil bath or superheated steam, when heat is applied, the heating time is preferably within 1 minute, more preferably within 45 seconds. It is preferable to heat for 20 seconds or more from a viewpoint of providing the said storage modulus E' to a hair holder reliably. In the case of heating in a dry state, when applying heat, the heating time is preferably within 60 minutes, more preferably within 30 minutes. It is preferable to heat for 55 minutes or more from a viewpoint of providing the said storage modulus E' to a hair holder reliably.

The coiling step and the heating step can be carried out in different places, and can also be carried out at intervals. From the viewpoint of improving the productivity of the hair holder, it is preferable that there is no step between the coiling step and the heating step, and that both are performed continuously.

Next, referring to Fig. 3, the hair treatment method using the hair holder of the present invention will be described. The hair treatment method preferably has a step (a) of inserting the hair bundle H into the cylindrical portion 26 of the hair holder 1 . The hair treatment method preferably has a step (b) of winding the hair holder 1 together with the hair bundle H inserted into the cylindrical portion 26 to form the hair bundle holder 3 in a rolled state. The hair treatment method preferably has a step (c) of heating the hair bundle holder 3 . The hair of the hair bundle H is preferably human hair.

In the hair treatment method of the present invention, in the step (c), the hair bundle H may be heated to 80° C. or higher while maintaining the coiled state. In the hair holder 1, one or both sheets of the two sheets 21, 22 have a storage modulus E' greater than the above value, so for example, even if heated to 80° C. or higher, the hair bundle holder can be maintained. 3 form. As a result, a strong curl shape can be given to the hair bundle H. In addition, the hair retainer 1 has excellent durability and can be used repeatedly. From the viewpoint of imparting a stronger curl shape to the hair bundle H, it is preferable to heat the hair bundle H in the state where the styling agent is applied. Usually, if the hair retainer is used with a setting agent applied, the hair retainer will be deformed due to the influence of the setting agent and heat, and the coiled state may not be maintained, or the outer diameter D may become larger. However, by using The hair holder 1 of the present invention can achieve the effect of suppressing the deformation of the hair holder due to the influence of the setting agent and heat, and can be used repeatedly. Even if the hair holder 1 is heated to more than 80°C, 90°C or higher, and further heated to 100°C or higher in the treatment step, it can maintain the coiled state without impairing durability.

When heating the hair bundle H in the state where the styling agent is applied, it is preferable to heat it to 80° C. or higher using an electric heater. Usually, if the electric heater is used to heat the hair holder, the electric heater is removed after the styling treatment, but by using the hair holder of the present invention, the following effect can be obtained: the electric heater can be removed at any point device, not after styling. When using a setting rod equipped with an electric heater inside for heating, it is preferable that among the two sheets 21 and 22, the first sheet 21 that is located inside and in contact with the setting rod during winding has the above-mentioned Sheets with a storage modulus E' above the value.

The hair holder of the present invention is not limited to the above-mentioned embodiment, and can be appropriately changed unless departing from the gist of the present invention. For example, the surface of the sheet constituting the "tubular body 2" may have unevenness by embossing or the like, or may be a flat surface.

The present invention further discloses the following hair holder, its manufacturing method, and hair treatment method using the same.

<1> A hair holder comprising a cylindrical body configured to allow a hair bundle to be inserted from an opening at one end toward an opening at the other end, and having a longitudinal direction and a width direction perpendicular to the longitudinal direction, The hair holder is configured to be wound up in the longitudinal direction, and has a first sheet positioned inside and a second sheet positioned outside during winding, One or both of the first sheet and the second sheet satisfy at least one of the following conditions (1) and (2). (1) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 50 MPa or more. (2) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is 19.2 MPa or more. <2> The hair holder according to <1> above, wherein the first sheet satisfies the condition (2). <3> The hair holder according to the above <1> or <2>, wherein the second sheet satisfies the above condition (1). <4> The hair holder according to any one of <1> to <3> above, wherein the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 70 MPa or more. <5> The hair retainer according to any one of <1> to <4> above, wherein the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 90 MPa or more. <6> The hair retainer according to any one of <1> to <5> above, wherein the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 200 MPa or less, preferably 100 MPa or less, More preferably, it is 96.5 MPa or less. <7> The hair retainer according to any one of <1> to <6> above, wherein the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is 20 MPa or more, preferably 30 MPa or more, More preferably, it is 35 MPa or more, and still more preferably, it is 40 MPa or more. <8> The hair retainer according to any one of <1> to <7> above, wherein the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is 80 MPa or less, preferably 50 MPa or less, More preferably, it is 45 MPa or less. <9> The hair retainer according to any one of the above <1> to <8>, wherein the above-mentioned one or two sheets are analyzed by differential scanning calorimetry at 125°C to 170°C, preferably 110°C or more, more preferably No exothermic peak is observed in the range of 100°C or higher, preferably 200°C or lower, more preferably 300°C or lower. <10> The hair retainer according to any one of the above <1> to <9>, wherein the above-mentioned one or two sheets are analyzed by differential scanning calorimetry at 100°C to 220°C, preferably 145°C or more, more preferably An endothermic peak is observed in a range of 170°C or higher, more preferably 180°C or higher.

<11> The hair holder according to any one of the above <1> to <10>, wherein the polyester-based nonwoven fabric has fibers containing polyethylene terephthalate. <12> The hair retainer according to the above <11>, wherein the polyethylene terephthalate-containing fiber contains an amorphous part. <13> The hair holder according to any one of the above <1> to <12>, wherein the polyester-based nonwoven fabric has an embossed part in a part thereof. <14> The hair holder according to the above <13>, wherein the polyester-based nonwoven fabric is a spun-bonded nonwoven fabric. <15> The hair holder according to the above <13> or <14>, wherein the area of each embossed part is 0.01 mm ² to 5 mm ² , preferably 0.1 mm ² or more, more preferably 0.8 mm ² or more, and preferably 2 mm ² or less, more preferably 1 mm ² or less. <16> The hair retainer according to any one of the above <13> to <15>, wherein the area of the plurality of embossed parts occupied by the polyester nonwoven fabric within the range of 10 mm x 10 mm is summed up The total area, that is, the embossing rate is not less than 10% and not more than 50%, preferably not less than 15%, more preferably not less than 25%, and more preferably not more than 35%. <17> The hair holder according to any one of the above <1> to <16>, wherein the basis weight of the above-mentioned polyester nonwoven fabric is 50 g/m ² to 300 g/m ² , preferably 70 g/m 2 m ² or more, more preferably 90 g/m ² or more, and preferably 200 g/m ² or less, more preferably 150 g/m ² or less.

<18> A method of manufacturing a hair holder. The hair holder has a cylindrical body configured to insert a bundle of hair from an opening at one end toward an opening at the other end and is in a coiled state, and has an inner body in the coiled state. The first sheet and the second sheet located on the outside, one or both of the first sheet and the second sheet include polyester non-woven fabrics, and The manufacturing method of the hair holder includes a coiling step of coiling the hair holder, and a heating step of applying heat of 120° C. or higher while maintaining the coiled state of the hair holder. <19> The method for producing a hair holder according to <18> above, wherein heat of 140° C. or higher is applied in the heating step. <20> The method for producing a hair holder according to <18> above, wherein heat of 160° C. or higher is applied in the heating step. <21> The method for producing a hair holder according to <18> above, wherein heat of 180° C. or higher is applied in the heating step. <22> The method for producing a hair holder according to any one of <18> to <21> above, wherein heat of 300°C or lower, preferably 250°C or lower is applied in the heating step. <23> The method for producing a hair holder according to any one of <18> to <22> above, wherein the coiling step and the heating step are performed continuously. <24> The method for producing a hair holder according to any one of <18> to <23> above, wherein a part of the polyester-based nonwoven fabric has an embossed portion. <25> The method for producing a hair holder according to any one of <18> to <24> above, wherein as the polyester-based nonwoven fabric, one having fibers containing polyethylene terephthalate is used. <26> The method for producing a hair retainer according to <25> above, wherein the polyethylene terephthalate-containing fiber contains an amorphous part.

<27> A hair treatment method using the hair holder according to any one of <1> to <17> above, and After inserting the hair bundle into the above-mentioned hair holder, the hair holder is wound up, and the above-mentioned hair bundle is heated to 80° C. or higher while maintaining the curled state of the hair holder. ＜28＞ The method of treating hair according to the above <27>, wherein the hair bundle is heated while a styling agent is applied thereto. <29> The hair treatment method of <28> above, wherein heating is performed using an electric heater. <30> The hair treatment method according to any one of <27> to <29> above, wherein the hair is human hair. Example

Hereinafter, the present invention will be described in more detail by means of examples. However, the scope of the present invention is not limited to the relevant examples.

[Examples 1 to 6 and Comparative Examples 1 to 4] As the two sheets constituting the hair holder, the product name "SMASH (registered trademark)" manufactured by Asahi Kasei Co., Ltd. was used. The sheet is a non-woven fabric obtained by using polyethylene terephthalate as a raw material fiber by a spun-bonding method. The basis weight of the nonwoven fabric is 100 g/m ² . Also, the area per one embossed portion was 0.8 mm ² , and the embossed rate was 30%. Using this sheet, a hair holder of the shape shown in Fig. 1 (a) and (b) was produced. The length L1 is 300 mm, the length L2 of the cylindrical body is 250 mm, the length W1 of the cylindrical body is 86 mm, and the length W2 of the opening at the other end is 76 mm. Next, the hair holder was wound up so that the outer diameter D became 26 mm, and while maintaining this state, heat at the temperature shown in Table 1 below was applied to manufacture the hair holders of Examples and Comparative Examples. In all Examples and Comparative Examples, heat was applied in a dry state. In all Examples and Comparative Examples, the heating time was set to 20 minutes.

For the hair holders of Examples and Comparative Examples, the storage modulus E', the presence or absence of an amorphous part, and the exothermic peak and endothermic peak were measured by the methods described above. The results thereof are shown in Table 1 below. As performance evaluation of the hair holders of Examples and Comparative Examples, heat resistance was evaluated. The heat resistance was evaluated based on the following evaluation criteria. The evaluation results are shown in Table 1 below and FIGS. 4( a ) and ( b ). When the evaluation is performed with the hair actually inserted into the hair holder, it is difficult to prepare a hair sample having the same diameter of the inserted hair or the hardness of the hair. Therefore, instead of evaluating the hair holder with the hair inserted, the heat resistance of the hair holder was evaluated by the following evaluation. If the heat resistance of the hair holder is high, it can be judged that the curled state of the hair holder in which the hair is inserted can be maintained, and the hair holder can be used repeatedly.

[Evaluation of heat resistance] The hair holder was wound so that the outer diameter thereof became 26 mm, and heat of 140° C. was applied to the hair holder in the wound state for 15 minutes. Thereafter, the outer diameter of the hair holder was measured. The rate of change of the outer diameter was obtained by the following formula (1), and this value was used as a scale for evaluating heat resistance. The rate of change of the outer diameter means that the smaller the value, the higher the heat resistance. Change rate of outer diameter (%) =((Outer diameter mm after heating-26 mm)/26 mm)×100……〔1〕 Furthermore, after heating, the end portion on the side of the opening 1a shown in FIG. 2 is separated from the hair holder in the coiled state, and when no arc is drawn at the end portion, the outer diameter after heating is measured except for this portion.

[Table 1] unit Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 Temperature applied in coiled state ℃ 125 145 165 185 205 155 85 105 115 100 Storage modulus E' at 100℃, 1 Hz MPa 57.2 64.9 97.0 96.2 93.5 90.1 25.8 31.0 34.2 28.1 Storage modulus E' at 150℃, 1 Hz MPa 19.2 20.3 37.3 41.2 40.1 31.2 18.2 19.1 19.0 17.2 Presence of amorphous part - have have have have have have have have have have heat generation temperature ℃ - - - - - - 117 118 - 118 endothermic peak generation temperature ℃ 128 150 171 190 210 160 - - - - Heat Resistance Evaluation - 34.6% 26.9% 15.4% 11.5% 7.7% 15.4% - 53.8% 38.5% 53.8%

As is clear from the results in Table 1, the hair holders of Examples 1 to 6 have a lower rate of change in outer diameter and better heat resistance than those of Comparative Examples 1 to 4. Also, from the results shown in Fig. 4(a), it is clear that the storage modulus E' under the conditions of 100°C and a frequency of 1 Hz is 50 MPa or more, and the slope of the change rate of the outer diameter changes greatly. The tendency of the rate of change to stabilize. Similarly, from the results shown in Figure 4(b), it is clear that the storage modulus E' under the conditions of 150°C and a frequency of 1 Hz is 19.2 MPa or more, and the slope of the change rate of the outer diameter changes greatly. The tendency to stabilize the rate of change of diameter. It can be seen that the heat resistance of the hair holders of Examples 3 to 6 whose storage modulus E' is 30 MPa or more at 150° C. and a frequency of 1 Hz is particularly good. Therefore, even if the hair holders of Examples 1 to 6 are heated while maintaining the curled state, the curled state of the hair holder can be maintained, and it is expected to impart a strong curl shape to the hair bundle. [Industrial availability]

According to the hair holder of the present invention, even if it is heated while maintaining the coiled state, the coiled state can be maintained.

This case is an application claiming priority based on the international application PCT/JP2019/031729 filed on August 9, 2019. The entire content of the international application PCT/JP2019/031729 is incorporated in this specification as a part of it .

1: Hair retainer 1a: opening 1b: Opening 2: cylinder 3:Hair bundle holder 4: Extension department 5: Fixed components 21: 1st sheet 22: 2nd sheet 24: Side junction 26: Cylindrical part C: central axis D: outer diameter H: hair bundle L1: the length of the hair holder 1 in the length direction X L2: The length of the cylindrical body 2 in the longitudinal direction X W1: the length of the hair holder 1 in the width direction Y W2: The length of the opening 1b at the other end in the width direction Y X: length direction Y: width direction

Fig. 1 shows a front view (a) and a rear view (b) of an embodiment of the hair holder of the present invention. Fig. 2 is a perspective view showing a hair bundle holder of the hair holder shown in Fig. 1 (a) and (b). 3( a ) to ( c ) are explanatory diagrams sequentially showing the procedure for imparting curls to hair bundles using the hair holder shown in FIGS. 1( a ) and ( b ). Figure 4(a) is a graph showing the relationship between the storage modulus E' of dynamic viscoelasticity and the heat resistance evaluation of the hair retainers obtained in the examples and comparative examples at 100°C and a frequency of 1 Hz, and Figure 4(b) ) is a graph showing the relationship between the storage modulus E' of the dynamic viscoelasticity at 150°C and a frequency of 1 Hz and the heat resistance evaluation of the hair retainers obtained in Examples and Comparative Examples.

1: Hair retainer

1a: opening

1b: Opening

2: cylinder

3:Hair bundle holder

4: Extension department

C: central axis

D: outer diameter

Claims (12)

A hair holder comprising a tubular body configured to insert a bundle of hair from an opening at one end toward an opening at the other end, and having a length direction and a width direction perpendicular to the length direction, the hair holder constitutes In order to be able to be wound up along the above-mentioned longitudinal direction, and to have a first sheet positioned inside and a second sheet positioned outside during winding, one or both of the first sheet and the second sheet satisfy The following conditions (1) and (2): (1) include polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 100°C and a frequency of 1 Hz is 64.9 MPa or more and 100 MPa or less; (2) includes It is a polyester non-woven fabric, and the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is not less than 20.3 MPa and not more than 50 MPa. Such as the hair retainer of claim 1, wherein the above-mentioned one or two sheets meet the following conditions (1') and (2): (1') contains polyester non-woven fabric, and is measured at 100°C and frequency 1Hz The storage modulus E' of dynamic viscoelasticity is not less than 70MPa and not more than 100MPa; (2) The storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1Hz is not less than 20.3MPa and not more than 50MPa, including polyester non-woven fabrics the following. Such as the hair retainer of claim 1, wherein the above-mentioned one or two sheets meet the following conditions (1) and (2'): (1) comprise polyester non-woven fabrics, and the dynamic Viscoelasticity The storage modulus E' of the storage modulus is not less than 64.9MPa and not more than 100MPa; (2') includes polyester non-woven fabrics, and the storage modulus E' of the dynamic viscoelasticity measured at 150°C and a frequency of 1Hz is not less than 30MPa and not more than 50MPa. The hair holder according to claim 1, wherein no exothermic peak is observed in the range of 125° C. to 170° C. by differential scanning calorimetry of the one or two sheets. The hair retainer according to claim 1, wherein an endothermic peak is observed in the range of 100° C. to 220° C. by differential scanning calorimetry of the one sheet or the two sheets. The hair holder according to claim 1, wherein the polyester-based nonwoven fabric has fibers containing polyethylene terephthalate. The hair holder according to claim 1, wherein the polyester nonwoven fabric has a basis weight of not less than 50 g/m ² and not more than 300 g/m ² . The hair holder according to claim 1, wherein the above-mentioned hair holder is wound so that its outer diameter becomes 26mm, and the rate of change of the outer diameter when heat is applied to the hair holder in the wound state at 140°C for 15 minutes is Below 26.9%. A method of manufacturing a hair holder, which is the method of manufacturing a hair holder according to any one of Claims 1 to 8, the hair holder has an opening configured to bundle hair from an opening at one end to the other end Partially inserted and rolled-up cylindrical body, and has a position in the rolled-up state The first sheet on the inside and the second sheet on the outside, one or both of the first sheet and the second sheet include polyester non-woven fabrics; The coiling step of the hair holder includes a heating step of applying heat of 120° C. or higher for 20 seconds or longer while maintaining the coiled state of the hair holder. A method of manufacturing a hair holder according to claim 1, comprising a coiling step of coiling the hair holder, and a heating step of applying heat of 120° C. or higher while maintaining the coiled state of the hair holder. The method of manufacturing a hair holder according to claim 9, wherein heat of 140° C. or higher is applied in the heating step. A use of a cylindrical body as a hair holder, wherein the cylindrical body is configured such that a bundle of hair can be inserted from an opening at one end to an opening at the other end, and has a length direction and a width direction perpendicular to the length direction , the cylindrical body is configured to be able to be wound up along the above-mentioned longitudinal direction, and has a first sheet positioned inside and a second sheet positioned outside during winding, and one of the first sheet and the second sheet The material or two sheets meet the following conditions (1) and (2): (1) It contains polyester non-woven fabrics, and the storage modulus E' of the dynamic viscoelasticity measured at 100 ° C and a frequency of 1 Hz is 64.9 MPa or more and 100 MPa The following; (2) Including polyester non-woven fabrics, and the storage modulus E' of dynamic viscoelasticity measured at 150°C and a frequency of 1 Hz is 20.3 MPa or more and 50 MPa or less, and In this use, the hair bundle is inserted into the cylindrical body, the cylindrical body is wound, and the hair bundle is heated to 80° C. or higher while maintaining the rolled state of the cylindrical body.

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