KR20120098943A - Method of manufacturing secondary whole roll for tissue paper product - Google Patents

Abstract

Provided is a tissue paper produced without bulking agent or the like and without increasing the number of manufacturing steps. (1) a lamination step of laminating a plurality of primary fabric rolls unrolled from a plurality of primary fabric rolls in a continuous direction thereof to form a laminated continuous sheet; (2) applying a chemical liquid to only one surface layer side of the laminated continuous sheet; Or a chemical liquid application step of applying a chemical liquid to one surface layer side rather than the other surface layer side, and (3) sandwiching the continuous layer of lamination between the receiving roll and the roller, and peeling between layers of the continuous layer of sheet. (4) a slit step of slitting the laminated continuous sheet so as to be the product width of the tissue paper product, or a multiple of the width thereof; and (5) each slit laminated continuous sheet. Of the secondary fabric roll for tissue paper products, characterized in that it has a winding process for winding the same axis to form a plurality of secondary fabric rolls having a product width or a multiple width of the tissue paper product. Article methods.

Description

Manufacturing method of secondary fabric roll for tissue paper product {METHOD OF MANUFACTURING SECONDARY WHOLE ROLL FOR TISSUE PAPER PRODUCT}

The present invention relates to a method for producing secondary fabric rolls for tissue paper products.

In recent years, a lot of high-quality tissue paper that softens the touch by containing a lotion chemical has been used (Japanese Patent Laid-Open No. 4-9121). As a method of apply | coating a chemical | medical solution to this sheet | seat (base paper), the application | coating by printing methods, such as dipping, spray coating, flexo, and gravure, is employ | adopted. However, tissue paper is required to increase its volume in order to improve its usability.However, tissue paper coated with lotion chemicals tends to increase the crepe formed when the paper floats due to the absorption and absorption of the paper. Is easy to happen. Conventionally, impregnation of pharmaceuticals such as a volume increasing agent (catalyst disclosed in Japanese Patent Laid-Open No. 2006-161192), water-repellent starch (Japanese Patent Laid-Open No. 2008-190050), or embossing (Japanese Patent Laid-Open No. 2009-34278). The process of increasing the volume has been carried out by a method such as Japanese Patent Publication. However, these methods are difficult to produce an effect on paper having a low metric basis such as tissue paper, and also increase the cost of materials, installation costs, etc., there is a problem such as an increase in the number of manufacturing processes.

Japanese Patent Laid-Open No. 4-9121 Japanese Patent Laid-Open No. 2006-161192 Japanese Patent Laid-Open No. 2008-190050 Japanese Patent Laid-Open No. 2009-34278

Provided is a tissue paper containing a lotion chemical liquid which is bulky and has a flexible usability and high wiping performance without using a volume increasing agent and increasing the number of manufacturing processes. It also shortens the production time for tissue paper containing lotion chemicals.

This invention which solved this subject is as follows.

[Invention described in claim 1]

It is a manufacturing method of the secondary fabric roll for tissue paper products which manufactures several secondary fabric rolls for tissue paper products continuously from a primary fabric roll,

A lamination process of laminating a plurality of primary fabric rolls unrolled from a plurality of primary fabric rolls along the continuous direction to form a laminated continuous sheet;

A chemical liquid applying step of applying the chemical liquid to only one surface layer side of the laminated continuous sheet or having a higher coating amount on one surface layer side than the other surface layer side;

A joining step of sandwiching a continuous sheet of lamination between the receiving roll and the roller, and forming a line-shaped joint to prevent interlayer peeling from the laminated continuous sheet;

A slit step of slitting the laminated continuous sheet to be the product width of the tissue paper product or its multiple times width;

Manufacture of secondary fabric rolls for tissue paper products, characterized by having a winding process of winding each slit laminated continuous sheet on the same axis to form a plurality of secondary fabric rolls having a product width or a multiple width of the tissue paper product. Way.

(Effect)

The base paper constituting the tissue paper is easily extended in the MD direction (length direction) by absorption. The elongation rate depends on the crepe rate of the base paper and the amount of water to be absorbed. The present invention is applied to the amount of the chemical to be applied to only one side of the two-layer surface continuous sheet forming the surface layer after laminating two or more layers of continuous sheet consisting of tissue paper or to apply to the two-layer surface continuous sheet With the difference, after the chemical solution is applied, the joint is partially formed to fix the stack. As a result, since the continuous sheet coated with a large amount of the chemical liquid is elongated than the other continuous sheet, wrinkles are generated on the surface, and this wrinkle has the effect of increasing the volume of the tissue paper. By this volume increasing process, even if the said chemical | medical solution is apply | coated, the web volume equivalent to the case where it processed without chemical | medical solution can be obtained.

The laminated continuous sheet after chemical liquid application is wound while being slit after bonding. By winding up in roll shape, the surface continuous sheet surface to which the chemical | medical solution is apply | coated a lot and the surface of the other continuous surface continuous sheet contact, and penetration (seasoning) of a chemical liquid occurs. This seasoning has the following effects. (a) The lotion agent penetrates into the paper layer and the lotion agent on the coated surface is gradually transferred to the counter surface effectively. (b) Crepe paper has a property that once absorbed and absorbed and elongated, it is difficult to return to its original state. The higher the crepe rate, that is, the larger the stretch margin, the stronger the tendency. Therefore, the elongation and wrinkles after the production of the sheet with more water absorption and moisture absorption amount are larger, and the fluctuation becomes larger.

Since the laminated continuous sheet to which the chemical liquid is applied makes the surface properties of the outer and front surfaces of the two front and back surfaces, i.e., the surface in contact with the skin almost identical, the chemical liquid applied to the front and back uses the same composition.

[Invention described in claim 2]

The manufacturing method of the secondary fabric roll for tissue paper products of Claim 1 which apply | coats a chemical | medical solution so that the application amount of both surface layers may be 1.5-5.0 g / m <2>.

(Effect)

By setting the chemical liquid to be applied in a prescribed amount, a bulky tissue paper product can be provided while keeping the basis weight low.

[Invention described in claim 3]

The manufacturing method of the secondary fabric roll for tissue paper products of Claim 1 whose moisture content of the said chemical liquid is 1 to 15%, and a viscosity is 1 to 700 mPa * s (40 degreeC).

(Effect)

If the moisture content of the chemical liquid is too high, the penetration rate is high, and it is difficult to make a difference in the elongation of both sheets. On the other hand, if the moisture content of the chemical liquid is too low, crepe elongation by application is small, and it is difficult to make a difference in the elongation of both sheets. In addition, if the viscosity of the chemical liquid is lower than the prescribed value, the chemical liquid will immediately penetrate into the other layers, making it difficult to cause a difference in the elongation of each surface continuous sheet, as well as on rolls such as anilox rolls, plate rolls, and gravure rolls during operation. The chemical liquid becomes easy to scatter. On the other hand, if the viscosity of the chemical liquid is higher than specified, it becomes difficult to apply the chemical liquid uniformly in the width direction. Thus, by making a chemical | medical solution into a prescribed moisture content and a viscosity, the secondary raw material roll which produced wrinkles on the surface more reliably can be manufactured.

[Invention described in claim 4]

A method for producing a secondary fabric roll for a tissue paper product according to claim 1, wherein the joint part is formed in a laminated continuous sheet after 0.3 to 2.5 seconds from the last chemical solution application.

(Effect)

In the present invention, it is preferable to integrate the laminate after 0.3 to 2.5 seconds after applying the last chemical solution. If the chemical liquid is less than 0.3 seconds, the chemical liquid is not sufficiently absorbed by the paper, and the chemical liquid adheres to the paper roll or the emboss roll, and the paper is cut off or the contaminants adhere to the respective rolls. If it exceeds 2.5 seconds, since the continuous sheet which apply | coated the chemical | medical solution fully extends, even if it fixes to another continuous sheet | seat in the process afterwards, it becomes difficult to produce wrinkles, and it becomes difficult to obtain the required effect. In addition, when the continuous sheet is completely stretched, the elongation that can cope with the draw fluctuation disappears, and the tensile strength decreases due to moisture absorption and absorption, so that the paper is easily cut and there is a problem of poor operability.

[Invention described in claim 5]

The manufacturing method of the secondary fabric roll for tissue paper products of Claim 1 whose crepe rate of the said one surface layer is 2 to 10% higher than the crepe rate of the said other surface layer.

(Effect)

By making crepe rate of the continuous sheet in which two chemical layers are apply | coated a lot more in the surface layer continuous sheet of two layers than the other, the elongation rate at the time of chemical liquid application between surface layer continuous sheets can be made larger, and wrinkles can be formed more reliably.

[Invention described in claim 6]

Each coating of the chemical liquid is carried out by a printing method, the method of producing a secondary fabric roll for tissue paper products according to claim 1, the coating speed is 300 ~ 1200m / min.

(Effect)

In apply | coating a chemical | medical solution to a laminated continuous sheet, this invention can perform a series of processes, without reducing a paper strength significantly by integrally laminating | stacking immediately after chemical | medical solution application. Therefore, it is possible to perform chemical liquid application at a higher speed than before. By applying the chemical liquid by printing such as flexo or gravure, the chemical liquid can be applied to the entire surface of one surface of the laminated continuous sheet without stain even at high speed. In particular, the chemical liquid application step in the present invention is preferably carried out in a fly machine.

[Invention described in claim 7]

Preparation of secondary fabric roll for tissue paper products according to claim 1, wherein the basis weight of the laminated continuous sheet subjected to the chemical liquid coating process and the bonding process is 10 to 25 g / m2 per ply, and the paper thickness is 110 to 180 μm with two plies. Way.

(Effect)

In the present invention, the paper thickness can be made thicker than the basis weight, thereby providing a tissue paper product having a soft and soft texture.

[Invention described in claim 8]

The tissue paper product manufactured by the manufacturing method of any one of Claims 1-7.

By generating wrinkles on at least one ply of tissue paper of two or more plies, it is possible to obtain a tissue paper processed with a large volume without depending on addition of a volume increasing agent or embossing. In addition, since wrinkles are added to include air between plies, a soft and soft texture can be provided. In particular, in tissue paper having wrinkles on the surface layer, the wiping performance is improved by the wrinkles, and the effect of improving the diffusibility at the time of wiping by the surface area expansion is also obtained.

In addition, the chemical liquid application step in the present invention can be carried out integrally with the fly step and at a faster speed than in the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the apparatus outline of the fly process of the tissue paper which concerns on this invention.
2 is a flowchart showing an outline of a ply process of tissue paper according to the present invention.
3 is a schematic diagram showing the structure of the tissue paper according to the present invention. (A) Cross-sectional view in MD direction before chemical liquid application, (B) Top view before chemical liquid penetration process, (C) Appearance figure seen from II direction.
4 is a schematic diagram showing the surface uneven structure of the continuous sheet of tissue paper according to the present invention. (A) before chemical liquid application and (B) after chemical liquid application.
It is a schematic diagram which shows a chemical liquid infiltration process.
6 is a schematic view showing an example of a multi-stand type interfolder, and shows a state seen from the front.
7 is a schematic view showing an example of a multi-stand type interfolder, and shows a state seen from the side.
8 is a schematic view showing an example of a multi-stand type interfolder, and shows a state seen from the front.
9 is a longitudinal sectional view of the folded tissue paper.
It is an enlarged perspective view of the principal part of the site | part regarding a printing plate.
Fig. 11 is an enlarged perspective view showing main parts showing a folding method of a secondary continuous sheet (tissue paper).
Fig. 12 is an enlarged perspective view of the main portion showing the folding method of the secondary continuous sheet (tissue paper).
Fig. 13 is an enlarged perspective view showing main parts showing a folding method of a secondary continuous sheet (tissue paper).
FIG. 14 is a partially broken view showing a state in which the tissue paper stored in the storage box (b) is taken out. FIG.
It is a figure which shows the apparatus outline of the fly process of the tissue paper which concerns on another form of this invention.
16 is a flowchart showing an outline of a ply process for tissue paper according to another aspect of the present invention.

In the tissue paper according to the present invention, the roll direction of the original roll is made into the MD direction or the longitudinal direction, and the vertical direction of the roll direction is the CD direction or the transverse direction.

This embodiment is described in detail below with reference to drawings. The manufacturing method of the household tissue paper which concerns on this invention, and its manufacturing facility are demonstrated below, taking the example of the manufacturing method and installation of the tissue paper containing chemical liquid as an example. In addition, the present invention is not limited to tissue paper, but is also applied to a toilet paper, a kitchen paper, and the like.

Fig. 1 shows an overview of the apparatus of the fly process of the tissue paper according to the present invention. 2, the flow of a manufacturing process is shown. In addition, the process according to Figure 1 is preferably carried out with a fly machine which is an integrated device.

In making tissue paper in a box-filled form, paper is made from pulp fibers using a known paper machine from a paper machine. As raw material pulp, mechanical pulp such as grand wood pulp (GP), pressured grand wood pulp (PGW), thermomechanical pulp (TMP), etc .: semi-chemical pulp (SCP), saline high yield unbleached kraft pulp (HNKP), Chemical pulp such as softwood bleached kraft pulp (NBKP), broadleaf unbleached kraft pulp (HNKP), broadleaf unbleached kraft pulp (LUKP), broadleaf bleached kraft pulp (LBKP), etc. Used pulp such as WP). The raw material pulp can be used by selecting one kind or two or more kinds. Preferably chemical pulp containing no fillers or foreign matter is preferred. NBKP: LBKP = 20: 80-80: 20 is good, especially NBKP: LBKP = 30: 70-60: 40 is preferable. In addition, the raw material pulp may contain wood and herbaceous materials such as straw pulp, bamboo pulp and kenaf pulp.

In the papermaking raw material, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, and copolymers thereof, and polyolefin fibers such as polyethylene, polypropylene, and polystyrene, polyacrylonitrile, and so forth Acrylic fibers such as krill, polyamide fibers such as nylon 6, nylon 66, nylon 12, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, synthetic fibers such as urethane fibers, triacetate fibers, diacetate Semi-synthetic fibers such as fibers, regenerated cellulose fibers such as viscose rayon, copper ammonia rayon, polynosic rayon, and lyocell, and chemical fibers such as regenerated fiber obtained by spinning collagen, alginic acid, chitin, etc. as a solution. . The polymer constituting the chemical fiber may be in the form of a homopolymer, a modified polymer, a brand, a copolymer, or the like.

The base paper produced by the paper machine is creped as a continuous sheet, calendered, and then wound up to form primary rolls 11 and 12 (commonly referred to as jumbo rolls). The basis weight of the continuous sheets 31 and 32 wound on the primary fabric roll is 10 to 25 g / m 2, preferably 12 to 20 g / m 2, and the paper thickness of the continuous sheets 31 and 32 is 2 plies. It is preferable to set it as 110-250 micrometers, Preferably it is 130-200 micrometers in the overlapped state.

Crepe rate of continuous sheets 31 and 32 is 10 to 30%, More preferably, it is 12 to 25%. The crepe rates of the continuous sheet 31 and the continuous sheet 32 may be the same, but the crepe rate of one continuous sheet 31 is 2 to 10% (more preferably 2) than the other continuous sheet 32. ˜5%).

The continuous sheets 31 and 32 are laminated by the lamination roller 13 to be two plies, calendered by the fly machine calender 14 as necessary and sent to the chemical liquid application step. As the method of applying the chemical liquid, all known coating methods such as dipping, spray coating, flexo coating, and gravure coating can be used.However, printing methods such as gravure coating, flexo coating, etc., which apply the chemical solution without staining the entire application surface, In particular, the flexographic coater provided with the doctor chamber 15 is more preferable because the chemical liquid can be supplied at a stable coating amount. In the ply process of FIG. 1, two flexo coaters 16 and 17 are provided and chemical | medical solution is apply | coated to each surface of the 2-ply continuous sheet.

The chemical liquid application amount of the two flexo coaters is different or the chemical liquid is applied only with one flexo coater. In the case where the crepe rate of the continuous sheet of two layers is different, it is preferable that more chemical liquid is applied to the continuous sheet (the continuous sheet 31 in the illustrated example) having the higher crepe rate. In the example shown in figure, the application | coating installation 16 which apply | coats a chemical | medical solution directly to the continuous sheet | seat 31 of two application facilities shall apply more chemical | medical solution than the other application | coating installation 17. The ratio of the chemical liquid coating amounts on both sides is 100: 0 to 60:40, preferably 75:25 to 60:40. The amount of the chemical liquid applied to both sides of the two plies is 1.5 to 5.0 g / m 2, preferably 2.0 to 4.0 g / m 2.

About the chemical | medical solution to apply | coat, a viscosity shall be 1-700 mPa * s at 40 degreeC from a viewpoint of performing high speed processing. More preferably, it is 50-400 mPa * s (40 degreeC). If it is smaller than 1 mPa · s, the chemical liquid is easily scattered on rolls such as anilox rolls, stencil rolls, and gravure rolls. On the contrary, if it is larger than 700 mPa · s, it is difficult to control the coating amount on each roll or continuous sheet. The component shall contain 70 to 90% of polyol, 1 to 15% of moisture, and 0.01 to 22% of functional chemicals.

Polyols include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butyrene glycol, polyethylene glycol, and derivatives thereof, sugars such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, trehalose, and the like. Include.

Functional agents include softening agents, surfactants, inorganic and organic fine powders, oily components, and the like. Softeners and surfactants have the effect of imparting softness to the tissue or smoothing the surface, and apply anionic surfactants, cationic surfactants and zwitterionic surfactants. Inorganic and organic fine powders make the surface a smooth touch. The oily component acts to increase the activity, and higher alcohols such as liquid paraffin, cetanol, stearyl alcohol and oleyl alcohol can be used.

Also, as a functional agent, as a drug to assist or maintain the moisturization of the polyol, one or more combinations of hydrophilic polymer gelling agents, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or salts thereof, ceramides, and the like Moisturizing agents, such as these, can be added.

In addition, as a functional drug, emulsifiers such as fragrances and various natural extracts, vitamins, emulsifiers to stabilize the compounding ingredients, and defoamers such as antifoaming agents to suppress the foaming of the chemical solution and stabilize the coating can be suitably blended. Can be. Furthermore, it may contain antioxidants of vitamin C and vitamin E.

Among the above components, polyhydric alcohols such as glycerin and propylene glycol are preferably used as the main components to stabilize the viscosity and the coating amount of the chemical liquid.

The temperature at the time of chemical liquid application is 30 to 60 degreeC, Preferably it is 35 to 55 degreeC.

After apply | coating a chemical | medical solution to a 2-ply continuous sheet, lamination is integrated within 0.3-2.5 second, Preferably it is 0.3-1.0 second. In the example shown in figure, the contact embossing roll 18 and the receiving roll 19 are provided, and it is fixed by performing a contact embossing (knurling) process to a 2-ply continuous sheet. At this time, the continuous sheet 32 having a small amount of chemical liquid application is arranged to contact the contact emboss roll 18. It is preferable that contact embossing is performed equally in the longitudinal direction from the both sides to the width of 1-10 mm at the position of 1/10-1/220 with respect to paper width. Although any of the known methods may be used, such as fixing the ply with an adhesive or the like, the use of contact embossing is more preferable because there is a problem that the touch tends to be hard and peels off when the chemical is applied. I can speak.

The 2-ply continuous sheet to which the contact embossing is applied is cut into the product width by the slitter 20, and then wound by the winding drum 21 to become the secondary fabric roll 22. It is preferable that the secondary fabric roll 22 wound up in a predetermined number of turns is left still at room temperature for 8 hours or more, and gradually the penetration of the chemical-coating agent into the paper layer and the transition to the mating surface are performed.

Conventionally, the chemical liquid applying process is performed in an off-machine coating equipment and the like, and the operation speed has been performed at 200 to 350 m / min. However, in the present invention, it is necessary to integrate the laminate immediately after the chemical liquid is applied. It is preferable to perform a series of devices of integration and winding up integrally. In this case, the operating speed of the apparatus may be equivalent to the conventional coating process speed, but it is preferable not to reduce the operating speed of other manufacturing processes. After application, the strength decreases due to absorption and absorption, and the paper is easily cut. Therefore, the coating speed is 300 to 1200 m / min, more preferably 750 to 900 m / min so that the sheet can be laminated and fixed before the absorption and moisture absorption are performed. It is preferable to carry out. The tissue paper after chemical liquid infiltration is folded and stored in a paper box.

An example of the tissue paper which concerns on this form is shown in FIG. Fig. 3A is a cross sectional view of a continuous sheet laminated on two plies before chemical liquid application (cross section cut parallel to the MD direction). In applying the chemical liquid on both sides of the continuous sheet laminated on two plies, the chemical liquid is applied to both sides of the continuous sheet 31 with a difference in the amount of the chemical liquid on both sides. After chemical liquid application, the laminate is integrated by the contact embossing 30 before the continuous sheet is fully elongated and cut into the product width by the slit (Fig. 3 (B)). Thereafter, the integrated fly is wound up and left to stand in order to infiltrate the chemical liquid (chemical liquid penetration process). The continuous sheets 31 and 32 coated with the chemical liquid from the lamination integration process to the chemical liquid penetrating process are mainly extended in the MD direction. At that time, the continuous sheet 31 coated with more chemical liquid has a higher elongation than the other continuous sheet 32. Since both continuous sheets are fixed by contact embossing, wrinkles are formed on the surface of the extended continuous sheet 31. This occurs (Fig. 3 (C)). The creep rate of the continuous sheets to be laminated is also different, and when a base paper having a high crepe rate is used for the continuous sheet 31, the difference in elongation between the continuous sheet 31 and the continuous sheet 32 can be caused.

The crepe is formed by the difference between the dryer speed and the winding speed after drying the base paper with a Yankee dryer and then peeling it from the dryer by a creping doctor. This crepe is adjusted by the adhesion of paper to the dryer, but there is some nonuniformity in this adhesion, and because the raw material of fibers is not evenly distributed, microscopic view shows a slight nonuniformity in three-dimensional crepe shape. exist. This nonuniformity becomes remarkable as crepe rate increases. Crepe rate is a value calculated | required by the following formula. ◇ ((circle speed of dryer at the time of paper manufacturing)-(reel circumference speed)) / (circle speed of the dryer at the time of paper production) * 100

In addition to the nonuniformity of this crepe, nonuniformity also arises in the elongation at the time of apply | coating a chemical | medical solution, and this is formed as small fluctuations three-dimensionally. This fluctuation is not currentized because tension is applied during the seasoning of the fabric, but it is restored and present after processing and cutting into a product. The larger the application amount of the chemical liquid to the sheet, the larger the crepe, the larger the change in crepe shape and the fluctuation of the sheet. Conversely, the smaller the application amount of the chemical liquid to the sheet is, the smaller the crepe is, the smaller the crepe shape change and the fluctuation of the sheet are. Therefore, it is possible to increase the volume increase effect by changing the creep rate as well as the application amount.

In the case where the continuous sheets 31 and 32 having different crepe rates with respect to the quality are laminated and commercialized, the tissue paper which is a product has a different bulk on both sides unless chemical liquid is applied (Fig. 4 (A)). However, by applying more chemical to the continuous sheet 31 having a larger surface irregularities (higher creep rate), the continuous sheet 31 is elongated at a higher elongation than the continuous sheet 32, and by contact embossing, MD Since it is fixed in parallel with the direction (not shown), the continuous sheet 31 swings and the volume of the laminated sheet is increased (Fig. 4 (B)).

By varying the amount of applied chemicals, there is a concern that the feel and usability may be different on both sides of the product.Because the second fabric roll is still in the state of the roll before providing it to the next process (folding process, etc.) Since the surfaces of the sheets 31 and 32 are kept in contact with each other (chemical liquid penetration process, FIG. 5), the chemical liquid components between the continuous sheets are gradually transferred (gray arrows in the drawing), and the difference is gradually reduced during seasoning. do. The white arrow in FIG. 5 shows the penetration direction of a chemical | medical solution component.

The moisture content in the chemical liquid is 1 to 15%, preferably 5 to 13%. When the moisture content of the chemical liquid is lower than 1%, elongation of the crepe immediately after application becomes small, and the effect of the desired volume improvement is difficult to be obtained. On the contrary, when the amount of water in the chemical liquid is higher than 15%, the tensile strength during processing is low and the elongation is large, and the paper is easily cut off, resulting in poor operability. In addition, since the crepes of both sheets are excessively stretched, the effect of desired volume improvement is not obtained. The amount of water in the chemical liquid to be applied is determined by the Karl Fischer method.

After creping and processing two pieces of crepe paper having different chemical solution amounts from each other, the sheet is sufficiently hygroscopic and the quality of both surfaces becomes uniform. However, the crepe elongation and wrinkles generated by the water given once do not return to the original shape even if the water is reduced, leaving some difference in elongation and causing a volume increase effect after cutting the web.

Due to the volume increase effect caused by the wrinkles, for example, when the metric basis weight is about 10 to 13 g / m 2, the paper thickness per trillion is 110 to 180 μm, more preferably 120 to 170 μm, more preferably 130 to 160 μm. It is preferable to set the web volume of 180 sets as 50-68 mm, More preferably, it is 55-65 mm.

In the illustrated example, two plies of tissue paper are exemplified, but three ply or more tissue paper having one or more intermediate layers may be used.

The secondary fabric rolls described above are provided in the folding process, especially in tissue paper products. As a folding process, well-known methods, such as a rotary interfolder and a multistand type interfolder, can be used, but it is more preferable to use it in a high-productivity multistand type interfolder.

A plurality of secondary fabric rolls 22 are set in a multi-stand interfolder, and tissue paper bundles are manufactured by unfolding and laminating the secondary continuous sheet from the set secondary fabric rolls 22 at the same time. Hereinafter, an example of the multi-stand type interfolder will be described.

6 and 7 show an example of a multi-stand type interfolder. Reference numeral 2 in the figure shows secondary fabric rolls 22, 22... Set on a secondary fabric roll supporting part, not shown, of the multi-stand type interfolder 1. These secondary fabric rolls 22, 22, ... are horizontally set in the direction (horizontal direction in FIG. 6, paper surface front-rear direction in FIG. 7) orthogonal to the plane which the required number showed. Each secondary fabric roll (R) is a slit in the width of the tissue paper product by the manufacturing equipment, manufacturing method of the secondary fabric roll for the tissue paper product described above, and multiple times the width of the tissue paper product, 2 in the illustrated example It is wound up and set in double width.

The continuous strip-shaped secondary continuous sheets 63A and 63B wound from the secondary fabric roll 22 are guided by guide means such as guide rollers G1 and G1 and sent to the folding mechanism part 60. Moreover, as shown in FIG. 8, the folding mechanism part 60 is provided with the cutting plate group 64 in which the number of cutting plates P, P ... is provided in parallel. About each cutout plate P, guide rollers G2 and G2 and guide round bar members G3 and G3 for guiding a pair of continuous secondary continuous sheets 63A or 63B are each provided in an appropriate place. Moreover, the conveyor 65 which receives and conveys the laminated | multilayered strip 67 laminated | stacked while being folded is provided below the printing plates P, P ....

A folding mechanism using this type of plate (P, P ...) is a mechanism known, for example, in US Patent No. 4052048. This kind of folding mechanism folds each successive secondary continuous sheet 63A, 63B ... in a Z-shape and also adjoins the adjacent secondary continuous sheet 63A, 63B ... as shown in FIG. Lay the ends together to fit each other.

10 to 13 show in detail the site of the folding mechanism portion 60, particularly with regard to the leaf plate P. As shown in FIG. In this folding mechanism part 60, a pair of continuous 2nd continuous sheets 63A and 63B are guide | induced with respect to each cutout P. FIG. At this time, the continuous second continuous sheets 63A and 63B are guided by shifting positions so that side end portions do not overlap each other by the guide round bar members G3 and G3.

At the time point guided by the printing plate P, the continuous second continuous sheet overlapped on the lower side is the first continuous second continuous sheet 63A, and the continuous second continuous sheet overlapped on the upper side is the second continuous two. When the secondary continuous sheet 63B is used, these continuous secondary continuous sheets 63A and 63B are the second continuous two of the first continuous secondary continuous sheets 63A, as shown in FIGS. 9 and 11. The side end part e1 which is not overlapped with the primary continuous sheet 63B is folded back to the upper side of the second continuous secondary sheet 63B by the side plate P1 of the plate P, and at the same time, FIGS. 9 and FIG. As shown in FIG. 12, the side end part e2 which does not overlap with the 1st continuous secondary continuous sheet 63A of the 2nd continuous secondary continuous sheet 63B is separated from the slit P2 of the cutout P. FIG. It is folded back to the bottom so that it is pulled under the printing plate P. At this time, as shown in FIGS. 9 and 13, the side ends e3 and e1 of the continuous secondary continuous sheet 63A stacked while being folded in the upstream cutout P are slit P2 of the cutout P. ) Is guided between the refolded portions of the second continuous secondary continuous sheet 63B. In this manner, each successive secondary continuous sheets 63A and 63B are folded in a Z-shape, and at the same time, side ends of adjacent adjacent secondary continuous sheets 63A and 63B are engaged with each other. When the top tissue paper is taken out when the product is used, the side end of the next tissue paper is taken out.

The laminated strip 67 obtained by the multi-stand type interfolder 6 as described above is cut (cut) at predetermined intervals in the flow direction FL in the cutting means 66 at the rear end, as shown in FIG. It becomes the tissue paper bundle 67a, and as shown to FIG. 14 (a), this tissue paper bundle 67a is further accommodated in the storage box B by a back end installation. In the multi-stand type interfolder 1 as described above, the direction of the paper of the laminated strip 67 is in the longitudinal direction (MD direction) along the flow direction FL, and in the transverse direction along the direction perpendicular to the flow direction. (CD direction). Therefore, the direction of the paper of the tissue paper constituting the tissue paper bundle 67a obtained by cutting the laminated strip 67 to a predetermined length is transversely along the folding direction of the tissue paper, as shown in Fig. 14 (a). Direction (CD direction), along the direction orthogonal to the folding direction of the tissue paper (vertical direction) (MD direction).

An example of a product obtained by storing a tissue paper bundle 67a in a storage box B in FIG. 14 (b) is illustrated. A dotted line M is provided on the upper surface of the storage box B, and the upper surface of the storage box B is opened by breaking a part of the upper surface of the storage box B with this dotted line M. FIG. The opening is covered with a film F having a slit in the center, and the tissue paper T can be taken out through the slit provided in the film F. As shown in FIG.

By the way, as mentioned above, since the direction of the paper of the tissue paper which comprises the tissue paper bundle 67a becomes a horizontal direction (CD direction) along the folding direction of a tissue paper, as shown to FIG. 14 (b). When the tissue paper T is taken out from the storage box B, the taking out direction is arranged along the horizontal direction (CD direction) of the tissue paper T.

15 and FIG. 16 show an outline of an apparatus according to another embodiment of the present invention. In the form of FIG. 15, the lamination continuous sheet after chemical | medical solution application | coating and lamination | stacking integration are sent to the rotary interfolder 23, and is cut | disconnected to product width after a folding process is performed.

Example

The base paper and the chemical liquid were prepared under the following conditions, and the extension test (test 1) of the base paper and the performance comparison test of the tissue paper (test 2) were performed.

[Source]

The pulp constituting the base paper was NBKP 50% and LBK 50%. In addition, the base paper before ply processing used 150 micrometers in the state which basis weight 13.5g / m <2> per sheet and paper thickness overlapped 2 plies, and used the crepe rate 19%.

[Chemical]

The chemical liquid was prepared so that a viscosity might be 300 mPa * s (40 degreeC).

[Performance Comparison of Tissue Paper]

The performance test and the sensory test were done about Examples 1-9 and the comparative example of the tissue paper which concern on this invention. The results of the structures of Examples 1 to 9 and Comparative Examples, the performance evaluation of the tissue paper, and the sensory evaluation are as shown in Table 1. The method of performance evaluation and sensory evaluation is as follows.

[Application amount]

The coating amount was calculated by the difference between each sheet metric basis weight when the chemical liquid after plying was not applied during operation and the respective sheet metric basis weight immediately after the corresponding coating.

(Amount of coating (g / m2)) = (meter basis weight (g / m2) just after application)-(meter basis weight (g / m2) when it is not applied)

The sum total of the application amount of both surface layers, or the application amount of both surfaces is a sum of the application amount per unit area of the sheet | seat of plyed tissue paper, and shall add the application amount of each sheet.

[Paper thickness]

Under the conditions of JIS P 8111 (1998), it shall be measured using a dial-glance gauge (thickness gauge) "PEACOCK G type" (Ozaki Corporation). Specifically, the plunger is placed on the measuring table after checking that there is no dust or dust between the plunger and the measuring table, and the memory of the dial visibility gauge is moved to set the zero point, and then the sampler is placed on the testing table by raising the flanger. Slowly lower the plunger perpendicular to the paper surface and read the gauge at that time. At this time, just put the plunger. The terminal of the plunger is made of metal so that a plane having a diameter of 10 mm is perpendicular to the paper plane, and the load in measuring the paper thickness is about 70 gf. In addition, the paper thickness is made into the average value obtained by measuring 10 times with 2 plies.

[Product metric basis]

It measured according to JIS P 8124 (1998). In the case of the 2-ply tissue product of Table 1, the average metric basis weight of the 2-ply sheet was described.

[Web volume]

A plastic plate of 30 g in weight and a size of 130 mm × 250 mm was placed on the bundle of tissue paper, and the heights of the four corners were averaged to be the web volume.

[Softness]

It measured according to the handleometer method (JIS L 1096E).

However, the test piece was made into the magnitude | size of 100 mm x 100 mm, and clearance was performed at 5 mm. The measurement was carried out five times each in the longitudinal and transverse directions in one ply, and the average value of the entire ten times was represented by two decimal places, and cN / 100 mm was expressed as a unit.

[Sensory evaluation]

The tissue paper according to Examples 1 and 2 and Comparative Examples 1 and 2 was subjected to sensory evaluation on softness and softness. The sensory evaluation was performed by 15 inspectors with five stages of evaluation of 3 pieces of general tissue paper (containing 180 sets of 'Eriel tissue' (Dio Paper Products)) which had not been applied with the chemical solution. Evaluation criteria are as follows.

All of Eriel Tissue's grades are 3

5: very good

4: Excellent

3: equal to the standard

2 falls.

1: It falls remarkably.

Table 1 shows the results of the sensory evaluation.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Comparative Example 1 Meter basis weight / 1P
(g / m 2) 15.0 15.0 14.9 15.1 15.8 15.0 15.1 15.0 14.9 14.9 Paper thickness / 2P
(Μm) 135 138 143 145 112 130 122 115 111 103 Web volume (180 trillion)
(Mm) 60 62 65 66 52 58 56 55 53 45 Softness (Softness)
(cN / 100mm) 0.95 0.96 1.01 1.55 0.79 0.89 0.87 0.83 0.82 0.72 Moisture content of chemicals
(%) 12.0 12.0 12.0 12.0 12.0 12.0 12.0 0.5 19.0 12 Coating amount to application surface ① 2.4 3.0 4.0 0.4 2.3 2.5 2.5 2.5 2.5 2.0 Coating amount to coating surface ② 1.6 1.0 0 0.8 4.0 1.5 1.5 1.5 1.5 2.0 The total amount of coating on both sides 4.0 4.0 4.0 1.2 6.3 4.0 4.0 4.0 4.0 4.0 Time from chemical solution application to contact emboss 0.6 0.6 0.6 0.6 0.6 0.2 3.0 0.6 0.6 0.6 Sensory evaluation

Softness 4.2 4.1 3.4 3.0 4.5 4.2 4.3 4.4 4.4 4.6 Fluffy

feeling 4.4 4.4 4.5 3.1 3.2 3.9 3.7 3.4 3.3 2.7 lubricity 3.8 3.9 3.6 3.4 4.3 3.8 3.9 3.9 3.8 3.9

As shown in Table 1, when comparing Examples 1 to 9, which are two-ply tissue papers, and Comparative Examples, the paper thickness and web volume were high in Examples 1 to 9, although the meter basis weight was almost the same. Showed. Moreover, also in the sensory evaluation, the Example surpassed the comparative example by the fluffy feeling. In particular, in Examples 1 and 2, it was found that they had a good flexibility (softness and softness) on the same level as the comparative example while maintaining a high paper thickness and a soft feeling.

The present invention is applicable not only to tissue paper used for home use, but also for industrial use, and in any field requiring bulky thin paper for cleaning of physicochemical experiment equipment.

11, 12: Jumbo Roll 13: Laminated Roll
14: Fly Machine Calendar 15: Doctor Chamber
16, 17: coating equipment 18: contact emboss roll
19: receiving roll 20: slit
21: Winding Drum 22: Fly Fabric Roll
30: contact emboss 31, 32: continuous sheet

Claims (8)

It is a manufacturing method of the secondary fabric roll for tissue paper products which manufactures several secondary fabric rolls for tissue paper products continuously from a primary fabric roll,
A lamination process of laminating a plurality of primary fabric rolls unrolled from a plurality of primary fabric rolls along the continuous direction to form a laminated continuous sheet;
A chemical liquid applying step of applying the chemical liquid to only one surface layer side of the laminated continuous sheet or having a higher coating amount on one surface layer side than the other surface layer side;
A joining step of sandwiching a continuous sheet of lamination between the receiving roll and the roller, and forming a line-shaped joint to prevent interlayer peeling from the laminated continuous sheet;
A slit step of slitting the laminated continuous sheet to be the product width of the tissue paper product or its multiple times width;
Fabrication of secondary fabric rolls for tissue paper products, characterized by having a winding process of winding each slit laminated continuous sheet on the same axis to form a plurality of secondary fabric rolls having a product width or a multiple width of the tissue paper product. Way. The method for producing a secondary fabric roll for tissue paper products according to claim 1, wherein the chemical liquid is applied such that the coating amounts of both surface layers are 1.5 to 5.0 g / m 2. The method of manufacturing a secondary fabric roll for tissue paper products according to claim 1, wherein the amount of the chemical liquid is 1 to 15% and the viscosity is 1 to 700 mPa · s (40 ° C.). The method of manufacturing a secondary fabric roll for a tissue paper product according to claim 1, wherein said joining portion is formed in a laminated continuous sheet after 0.3 to 2.5 seconds from the last chemical solution application. The manufacturing method of the secondary fabric roll for tissue paper products of Claim 1 whose crepe rate of the said one surface layer is 2 to 10% higher than the crepe rate of the said other surface layer. The method of manufacturing a secondary fabric roll for a tissue paper product according to claim 1, wherein each of the chemical liquids is applied by a printing method, and the coating speed is 300 to 1200 m / min. 2. The secondary fabric roll for tissue paper products according to claim 1, wherein the basis weight of the laminated continuous sheet subjected to the chemical liquid applying process and the bonding process is 10 to 25 g / m 2 per ply, and the paper thickness is 110 to 180 µm with two plies. Manufacturing method. The tissue paper product manufactured by the manufacturing method of any one of Claims 1-7.

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