JPH0754208A - Sheath-core type composite binder fiber - Google Patents

Abstract

PURPOSE:To obtain a sheath-core type composite binder fiber excellent in deodorizing properties, antimicrobial properties and antimiticidal properties and capable of forming a hot-melt-treated textile good excellent in fastness to washing. CONSTITUTION:This sheath-core type composite binder fiber is made up by a core component composed of a thermoplastic polymer and a sheath component composed of a thermoplastic polymer containing a deodorizing agent, an antimicrobial agent and/or an antimiticidal agent respectively in an amount of >=3wt.%, >=0.1wt.% and >=0.2wt.% based on the whole composite fiber. In this sheath-core type composite binder fiber, the melting point of the thermoplastic polymer constituting the sheath component is 30 deg.C or more lower than that of the thermoplastic polymer constituting the core component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core-sheath type composite binder fiber, and more specifically, to a padding field such as mattress, cushion, bed mat, batting of clothing, tatami floor, stuffing of furniture, curtain, carpet. In the field of interiors such as etc., various non-woven fabrics, papermaking fields, etc., and in the field where sanitary processing (deodorization, antibacterial, anti-mite processing) is required, the present invention relates to a core-sheath composite binder fiber for sanitary processing, which is used for heat-bonding main fibers It is a thing.

[0002]

2. Description of the Related Art Synthetic fibers, especially polyester fibers and polyamide fibers, are indispensable as clothing, stuffing materials and industrial materials because of their excellent dimensional stability, weather resistance, mechanical properties and durability. Has become. However, it has been desired to add a special function depending on the intended use. For example, for mattresses, bed mats, tatami floors, and cotton stuffing for furniture, there is a demand for a textile product that prevents the generation of fungi such as mold and mites, and that does not give off a bad odor.
For sheets, carpets, etc., textile products having antibacterial and deodorant properties have been desired.

Conventionally, in order to impart deodorant property, antibacterial property, anti-mite property and the like to fibers, deodorant agents, anti-bacterial agents and anti-mite agents have been attached to the surface of textile products by a post-processing method or the like. (For example, JP-A-62-15388, JP-A-62-250283, and JP-A-57-5187).
However, there is a drawback that the durability is insufficient. In particular, there has been a problem that the performance thereof is extremely deteriorated when it is repeatedly washed or the like, or when a textile product is dyed.

It has also been proposed to incorporate a deodorant, an antibacterial agent, an anti-mite agent, etc. into a synthetic resin forming a fiber for the purpose of improving durability (for example, JP-A-60-66).
No. 753, JP-A-62-215010, JP-A-2-99606, JP-A-54-147220, and JP-A-59-133235), many of which cannot exhibit sufficient performance. , Especially when a deodorant, an antibacterial agent, an acaricide, etc. is kneaded into the entire cross section of the thread, the deodorant, antibacterial agent, and acaricide at the center of the thread are deodorized and antibacterial as compared with the surface layer. However, there is a problem that the effect of preventing ticks cannot be fully exerted, and furthermore, deodorants, antibacterial agents and anti-tick agents have a great influence on the properties of synthetic resins, and the usable range is significantly limited, or fiberization is possible. There arises a problem that productivity in the process, in particular, single yarn breakage during spinning, and a lot of troubles such as shortening of pack life due to pack filter clogging occur.

Further, an anti-mitic agent is applied to the surface of the filling base material containing at least the core-sheath type composite fiber whose sheath portion is composed of a polymer having a lower melting point than that of the core portion, and the sheath portion of the composite fiber is dissolved. Then, there is also known one which protects the tick-proofing agent (Japanese Patent Laid-Open No. 2-118151), but the protection of the tick-proofing agent is still incomplete, and sufficient washing resistance can be obtained. Can not.

On the other hand, a core-sheath type composite fiber in which a sheath component is a low melting point polymer and a core component is a high melting point polymer is a nonwoven fabric,
It is well known to use a main fiber such as a cotton stuff as a binder fiber for thermally adhering.

[0007]

Therefore, the object of the present invention is to solve the problems of the conventional sanitary processed fibers, and to show further excellent deodorant, antibacterial and / or acaricide-proof,
It is an object of the present invention to provide a binder fiber capable of producing a sanitary processed fiber product having excellent detergency, antibacterial property, and / or mite-preventing performance which is excellent in washing resistance even after repeated washing.

[0008]

In order to achieve the above object, the present inventors have proposed a core-sheath type composite binder fiber comprising a low melting point polymer as a sheath component and a high melting point polymer as a core component, instead of a main fiber. In view of the above, the present invention has been completed in consideration of kneading a deodorant, an antibacterial agent and / or an anti-mitic agent into the sheath component of the binder fiber.

That is, according to the present invention, a core component made of a thermoplastic polymer, 3% by weight or more of a deodorant, 0.1% by weight or more of an antibacterial agent and / or 0% of an acaricide with respect to the whole composite fiber. And a melting point of the thermoplastic polymer constituting the sheath component, which is 30 ° C. or more lower than the melting point of the thermoplastic polymer constituting the core component. Is a core-sheath type composite binder fiber.

As the thermoplastic polymer constituting the core component of the core-sheath type composite binder fiber of the present invention, any thermoplastic polymer may be used as long as it is melt-spinnable and has a melting point of 30 ° C. or more higher than that of the sheath component thermoplastic polymer. However, a thermoplastic polymer having a melting point of 200 ° C. or higher is preferably used in order to satisfy the properties required for various fiber applications including mechanical properties and heat resistance. Preferred examples thereof include polyester having nylon terephthalate or polybutylene terephthalate as a main component, nylon 6,
Examples thereof include nylon 66 or polyamide containing metaxylenediamine nylon as a main component.

On the other hand, the thermoplastic polymer constituting the sheath component of the composite binder fiber of the present invention does not cause inconveniences such as decomposition and deterioration due to the added deodorant, antibacterial agent and / or acaricide, and As long as the melting point is lower than that of the thermoplastic polymer of the core component by 30 ° C. or more, any one can be used, but the energy cost for thermally bonding the main fiber is saved, and the material is melted and fluidized under the use environment. Melting point is 70 to 180 ° C., preferably 1
The temperature is preferably from 0 to 150 ° C. As such a thermoplastic polymer, a polyolefin polymer is particularly preferably used. For example, various polyethylenes such as low density polyethylene and high density polyethylene, polypropylene, polybutene-1, poly-4-methylpentene-1, ethylene / vinyl acetate Examples thereof include polymers. Of these, polypropylene is preferred.

Further, it is desirable to select the thermoplastic polymer constituting the sheath component in consideration of the affinity with the main fiber to be heat-bonded.

In the composite binder fiber of the present invention, the melting point of the thermoplastic polymer constituting the sheath component must be lower than the melting point of the thermoplastic polymer constituting the core component by 30 ° C. or more. When this temperature difference is less than 30 ° C., when mixed with the main fiber and subjected to the heat-bonding treatment, the core component is cross-linked between the main fibers without melting, and the shape of the heat-bonded fiber product is maintained. While melting, the sheath component containing the deodorant, the antibacterial agent and / or the anti-mite agent is melted and sufficiently fluidized to heat-bond the main fiber, and the deodorant,
It becomes difficult to allow the sanitary processing effect to be effectively exhibited by allowing the antibacterial agent and / or the anti-mitic agent to exist over the entire surface of the main fiber.

In the composite binder fiber of the present invention,
The thermoplastic polymer constituting the sheath component contains 3% by weight or more, preferably 3 to 10% by weight, based on the whole conjugate fiber.
More preferably 5 to 8% by weight of deodorant, 0.1% by weight or more, preferably 0.1 to 7% by weight, more preferably 1 to 3% by weight of antibacterial agent and / or the total amount of the composite fiber. It is 0.2% by weight or more, preferably 0.
3 to 10% by weight, more preferably 0.5 to 3% by weight, of a mites preventive agent is mixed and added.

When the content of the deodorant is less than 3% by weight, it becomes difficult to obtain a sufficient deodorizing effect. In addition, even if a large amount of deodorant is added, improvement in deodorant performance commensurate with the content cannot be expected, and the cost is rather high.
Since it leads to deterioration of fiber performance and spinning productivity, it is desirable to set it to 10% by weight or less.

Further, if the content of the antibacterial agent is less than 0.1% by weight, a sufficient antibacterial effect cannot be obtained. On the other hand, even if a large amount of antibacterial agent is added, the antibacterial property almost reaches the saturated state, there is no point in increasing the content, the cost becomes high, and it is economically disadvantageous. desirable.

Further, when the content of the acaricide is less than 0.2% by weight, leaching and volatilization of the acaricide from the fiber are reduced, and even if the repellent effect is obtained, a sufficient killing effect is obtained. It is not suitable because the effect of ticks cannot be obtained and the durability is reduced. On the other hand, even if a large amount of acaricide is added, not only does the acaricidal effect reach saturation, but the mechanical properties of the binder fiber obtained are reduced, and the acaricide is volatilized to a high concentration, which is unpleasant. Since it becomes odorous, it is preferably 10% by weight.

There is no particular limitation on the deodorant, antibacterial agent and acaricide used in the present invention, and deodorant, antibacterial agent and acaricide which have been conventionally used by being mixed with fibers may be used. it can.

Among them, as the deodorant, the weight ratio of zinc oxide and silicon dioxide is 1: 3 to 3: 1, preferably 1 :.
Intimately mixed particles of 2 to 2: 1 are preferably used. According to a transmission electron microscope observation, the intimately mixed fine particles are
The average primary particle size is 5 to 30 nm, preferably 10 to 20
nm, the average particle size of aggregation is 3 μm or less, preferably 1 μm
It is the following. If the aggregated average particle size exceeds 3 μm, the pack pressure during melt spinning and the yarn breakage are unfavorable.

As the antibacterial agent, antibacterial fine particles containing silver ions as an active ingredient and having a particle size of 3 μm or less, preferably 1 μm or less are preferably used.

The antibacterial fine particles are those in which silver ions are supported on solid particles, and in addition to the silver ions, ions such as copper, zinc, mercury, tin, lead, bismuth, cadmium, chromium and thallium are contained. You may have. As solid particles, zirconium phosphate salt [NaZr ₂ (PO
₄ ) ₃ ] such as zirconium, A-type zeolite,
X-type zeolite, Y-type zeolite, T-type zeolite, high silica zeolite, sodalite, mordenite, analcime, clinoprolyte, earbasite,
Examples include inorganic ion exchangers such as zeolites such as lionite and apatites such as hydroxyapatite [Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ ]. Of these, zirconium phosphate salts are preferable from the viewpoints of antibacterial properties, discoloration resistance, washing resistance, silver ion elution properties, and the like. The particle diameter of the antibacterial fine particles is 3 μm or less, preferably 1 μm
It is below, and if it exceeds 3 μm, it is not preferable because it causes an increase in pack pressure during melt spinning and a break in yarn.

Further, as the anti-mitic agent, a compound represented by the following general formula (I) or (II) is preferably used.

[0023]

[Chemical 2]

(In the formula, R represents a hydrogen atom or a hydroxyl group, X ₁ , X ₂ and X ₃ may be the same or different and each represents a single bond or an alkylene group having 1 to 3 carbon atoms; Y is —O—, —CO—, —COO— or —CH
Indicates OH-. However, Y is —COO—, X ₂ is a single bond,
And the case where X ₃ is a single bond or a methylene group is excluded. )
In the general formula (I) or (II), X1, X2 and X3
Examples of the divalent alkylene group include methylene, ethylene, propylene, methylmethylene, ethylmethylene, methylethylene and the like.

Examples of the compound represented by the general formula (I) preferably used in the present invention include diphenylmethane and dibenzyl, and examples of the compound represented by the general formula (II) include benzyl phenyl ether and Benzyl phenyl ethyl ether, benzophenone, benzyl phenyl ketone, benzyl ketone,
Benzalacetophenone, β-phenylethylbenzoate, γ-phenylpropylbenzoate, phenylphenylacetate, benzylphenylacetate, β-phenylethylphenylacetate, phenylcinnamate,
Examples thereof include benzyl cinnamate, β-phenylethyl cinnamate, β-phenylpropyl cinnamate, cinnamyl cinnamate, diphenylcarbinol, phenylbenzylcarbinol and dibenzylcarbinol.

With respect to the composition ratio of the core component and the sheath component, the core component / the sheath component (weight ratio) is preferably 30/70 to 70/30, and particularly 45/55 to 55/45. Is preferred. When it exceeds 70/30, the thermal adhesiveness is lowered, and further, the polymer constituting the sheath component is apt to be broken, and the spinning productivity is lowered. On the other hand, if it is less than 30/70, the original fiber performance of the core component polymer is deteriorated.

The composite binder fiber of the present invention is obtained by melt-spinning a core-sheath type composite fiber by using a core-sheath type composite spinning device which is usually used, using the above-mentioned core component and sheath component, and then stretching and heat-treating by a conventional method. Can be manufactured by.

The core-sheath type composite binder fiber of the present invention is cut into a length of 3 to 150 mm depending on the application, and uniformly mixed at a mixing ratio of 10 to 50%, preferably 20 to 30% with respect to the main fiber. 5 to 50 ° C., preferably 10 to 20 ° C. higher than the melting point of the thermoplastic polymer constituting the sheath component by mixing,
Moreover, the main fibers can be thermally bonded by heating at a temperature lower than the melting point of the thermoplastic polymer that constitutes the core component. The heating time is usually 1 to 20 minutes, preferably 5 to 10 minutes.

As described above, a fiber product such as a non-woven fabric and a stuffed cotton in which the main fiber is heat-bonded by the core-sheath type composite binder fiber of the present invention is required to have deodorant property, antibacterial property and / or anti-mite property. It can be used in various fields.

[0030]

The core-sheath type composite binder fiber of the present invention is a thermoplastic resin having a high melting point, which does not melt during the heat-bonding treatment and crosslinks between the main fibers to maintain the shape of the heat-bonded fiber product. A polymer is placed in the core component, and a deodorant, an antibacterial agent and / or
Alternatively, the sheath component is made of a low-melting thermoplastic polymer that contains an anti-mite agent and is melted during the heat-bonding treatment to heat-bond the main fibers.

Therefore, when the core-sheath type composite binder fiber of the present invention is mixed with the main fiber and subjected to the heat-bonding treatment, only the low-melting-point sheath component is melted and fluidized to coat and heat-bond the main fiber, The high-melting-point core component does not melt but crosslinks between the main fibers to maintain the form of the heat-bonded fiber product.

Further, the sheath component which is melted and fluidized to cover the surface of the main fiber and heat-bonded is a deodorant, an antibacterial agent and / or
Or, since it contains an anti-mite agent, the deodorant, the antibacterial agent and / or the anti-mite agent will be present over the entire surface of the main fiber, and the deodorant agent will eliminate the external odor, bacteria and / or mites. The odor, the antibacterial and / or the anti-mite effect are effectively exhibited.

Moreover, in the core-sheath type composite binder fiber of the present invention, since the deodorant, the antibacterial agent and / or the anti-mite agent is kneaded in the thermoplastic polymer of the sheath component, the thermoplastic polymer of the sheath component is used. Even after being melted and fluidized to cover the main fiber, it is firmly held in the main fiber, does not fall off by washing, and has excellent wash resistance.

[0034]

The present invention will be described in more detail with reference to the following examples. The performance evaluations in the examples are measured according to the following methods.

(1) Antibacterial property The test sample was placed on an agar medium in which Staphylococcus aureus was inoculated, and the bacteria were cultured at 37 ° C. for 24 hours. The antibacterial effect was determined by the presence or absence of growth of Staphylococcus aureus around the sample. Was judged.

(Judgment) ◯: No bacterium grows around the sample and halo occurs.

Δ: Growth of some bacteria is recognized around the sample, but halo occurs.

X: Bacterial growth was observed around the sample and no halo was generated.

(2) Deodorizing property In the case of ammonia, the deodorizing rate was obtained by measuring the ammonia concentration using the apparatus shown in FIG. That is,
Ammonia sensor 1 [AE-235; Toa Denpa Co., Ltd.
Made] and ion meter 3 [IM-IE; Toa Denpa Co., Ltd.
Manufactured] and the recorder 4 are connected, the ammonia sensor 1 is attached to the closed container 5, and ammonia gas is injected into the container 5 with a syringe so as to be 500 ppm, and then the measurement sample 2 is set in the container 5. After standing for 2 hours, the ammonia concentration in the container 5 was measured. The deodorizing rate was defined as the rate of decrease in ammonia concentration.

In the case of hydrogen sulfide, a predetermined amount of sodium sulfide, distilled water, and high-concentration hydrochloric acid are added to a predetermined container to generate a fixed amount of hydrogen sulfide gas, and the measurement sample is suspended in the container.
After leaving it at 24 ° C. for 24 hours, the hydrogen sulfide gas concentration in the container was measured using a Kitagawa gas detector tube. The deodorizing rate was defined as the rate of decrease in hydrogen sulfide gas concentration.

(3) Acaricidal rate A sample web having a basis weight of 100 g / m 2 was cut into a size of 5 cm 2, the test web was placed in a petri dish having a diameter of 10 cm, and 150 mg of a medium in which mites (Dermatophagoides farinae) were bred on the web ( The number of mites is about 200) and the temperature is 25
After 48 hours under the condition of ℃ and relative humidity of 75%,
The number A of live mites was determined by the heat displacement method. On the other hand, as a control, the number of live mites B was calculated in the same manner by using a fiber containing no anti-mitic agent, and the miticidal rate was calculated by the following formula. When this value is 60% or more, it is good, and when it is 80% or more, it is very good.

Mite killing rate (%) = (1−A / B) × 100 (4) Mite repellency rate (invasion prevention method) In a petri dish with a diameter of 10 cm, the surrounding area of which was filled with saturated saline, together with the breeding medium, 200 ticks (Dermatophagoides farinae) (150 mg as a culture medium) are divided into 3 places, a 3.2 cm diameter petri dish is placed in the center of the petri dish, the bait of the tick is placed in the petri dish, and the sample web is packed. 72 at a temperature of 25 ° C and a relative humidity of 75%.
After standing for a period of time, the number C of mites that had penetrated into the web was measured.

On the other hand, as a control, using a sample web containing no anti-mite agent, the number D of mites that had penetrated into the web was determined in the same manner, and the repelling rate of mites was determined by the following formula.
When this value is 60% or more, it is good, and when it is 80% or more, it is very good.

Mite repellent rate (%) = (1-C / D) × 100 Incidentally, when the above-mentioned antibacterial property, deodorant property, acaricidal rate, and mite repellent rate are measured on the sample after washing, the washing is It carried out by the following method.

That is, using a household electric washing machine, neutral detergent New beads (trade name, manufactured by Kao Corporation) 2 g / l
After washing for 5 minutes in an aqueous solution containing 40 ° C containing water, washing with running water for 2 minutes, dehydration, further washing with running water for 2 minutes, dehydration and drying. The repeated washing was performed by repeating the above operation.

[0046]

[Examples 1 to 9 and Comparative Examples 1 to 3] As a deodorant, intimately mixed fine particles having a mixing ratio of zinc oxide and silicon dioxide of 2: 1 by weight [SZ-100; manufactured by Suzuki Sogyo Co., Ltd., Average primary particle diameter 15 nm, aggregation average particle diameter 1 μm]
A polypropylene polymer [TG-810; Showa Denko KK, melt index 30, melting point 150 ° C.] was kneaded with a twin-screw extruder manufactured by Japan Steel Works to prepare master chips of SZ-100.

Similarly, a silver-based inorganic antibacterial agent in which silver ions and an inorganic ion exchanger (zirconium phosphate) are bonded [Novalon AG-300; manufactured by Toagosei Chemical Industry Co., Ltd.,
Average particle diameter 1 μm]
It was kneaded with G-810 to prepare a master chip of Novalon AG-300.

Further, an ethylene-vinyl acetate copolymer containing benzophenone (copolymerization weight ratio of 84:16) was used as an anti-mitic agent, and the above polypropylene-based polymer TG-8 was used.
The mixture was kneaded with No. 10 to prepare a benzophenone master chip.

The above master chip is used as a deodorant, antibacterial agent,
The mite-preventing agent was mixed with the polypropylene polymer TG-810 so as to have the content shown in Table 1 to obtain a sheath component constituent polymer.

On the other hand, polyethylene terephthalate having a melting point of 260 ° C. and an intrinsic viscosity of 0.64 was used as the core constituent polymer, and together with the sheath constituent constituent polymer at the ratio shown in Table 1, the nozzle hole diameter was 0.5 mm and the number of holes was 450. Spinning temperature (core / sheath = 300 ° C / 2
Melt composite spinning was carried out at a discharge rate of 400 g / min and a take-up speed of 900 m / min.

The undrawn yarn thus obtained was drawn 2.5 times in warm water at 70 ° C., heat treated at 125 ° C. for about 20 minutes, and then cut into a length of 51 mm to obtain a denier of about 4 denier. Core-sheath type composite binder short fibers were obtained.

Each of the obtained binder short fibers was uniformly mixed at a mixing ratio of 25% by weight into polyester short fibers having a fineness of 6 denier and a fiber length of 51 mm, and a web was prepared with a flat card for 5 minutes at 170 ° C. After heating and heat-bonding treatment, deodorant property, antibacterial property, and mite-proof property were evaluated. The results were as shown in Tables 2 and 3.

[0053]

[Table 1]

[0054]

[Table 2]

[0055]

[Table 3]

As is clear from the results shown in Tables 2 and 3,
The core-sheath type composite fibers (Examples 1 to 7) of the present invention have good deodorant properties, antibacterial properties and anti-mite properties and are excellent in washing resistance thereof, but when the content of the deodorant is small. (Comparative Example 1), when the content of the antibacterial agent is small (Comparative Example 2) and when the content of the anti-mite agent is small (Comparative Example 3), the deodorizing property,
Antibacterial and tick-proof properties are not improved.

The weight ratio of the core component and the sheath component (core component:
When the (sheath component) is less than 30:70 (Example 8), the fiber performance is slightly inferior, and the number of broken yarns during spinning is slightly increased.
When it exceeds 30 (Example 9), the number of yarn breakage during spinning is slightly increased and the thermal adhesiveness is slightly lowered.

[0058]

Comparative Example 4 In Example 1, 6% by weight of SZ-100 was used without using polyethylene terephthalate as a core component,
2% by weight of Novalon AG-300 and 1% of benzophenone
Polypropylene polymer TG-810 containing by weight
Was melt-spun from a spinneret having a nozzle hole diameter of 0.5 mm and 450 holes at a spinning temperature of 250 ° C., a discharge rate of 400 g / min, and a take-up speed of 900 m / min.

Then, it was stretched, heat-treated and cut under the same conditions as in Example 1 to obtain a binder short fiber having no core-sheath structure, in which SZ-100, Novalon AG-300 and benzophenone were kneaded into the whole fiber. It was Using this binder short fiber, a web made of polyester short fiber was heat-bonded in the same manner as in Example 1.

The results are shown in Tables 4 and 5, and the deodorant property, antibacterial property, and mite-proof property were all poor, and the shape retention of the web after heat-bonding treatment was poor.

[0061]

Comparative Example 5 In Example 7, SZ-100, Novalon AG-300, and benzophenone were not kneaded into the composite binder fiber, but kneaded into polyester staple fiber as the main fiber, and other conditions were the same as in Example 7. The polyester web was heat-bonded.

The results are as shown in Tables 4 and 5 and were inferior in deodorant property, antibacterial property and anti-mite property.

[0063]

Example 10 Polyethylene terephthalate obtained by copolymerizing 40 mol% of isophthalic acid and 12 mol% of diethylene glycol in place of the polypropylene polymer TG-810 in Example 7 (melting point: 90 ° C., intrinsic viscosity: 0.
55) was used and other conditions were the same as in Example 7 to obtain a core-sheath type composite binder short fiber. Using this binder short fiber, a web of polyester short fibers was heat-bonded in the same manner as in Example 7.

The results are shown in Tables 4 and 5, and were good in deodorant property, antibacterial property and anti-mite property and excellent in washing resistance.

[0065]

[Example 11] In Example 6, benzyl phenyl ether was used in place of benzophenone as an anti-mite agent,
The other conditions were the same as in Example 6, and the polyester short fiber web was heat-bonded.

The results are as shown in Tables 4 and 5, and were excellent in tick resistance and excellent in washing resistance.

[0067]

Comparative Example 6 Polyethylene terephthalate (melting point: 160 ° C., intrinsic viscosity: 0.60) copolymerized with 60 mol% of isophthalic acid and 3 mol% of diethylene glycol was used in place of the polypropylene polymer TG-810 of the sheath component in Comparative Example 6. ) Was used instead of polyethylene terephthalate as a core component, and polyethylene terephthalate (melting point 185 ° C., intrinsic viscosity 0.62) obtained by copolymerizing 75 mol% of isophthalic acid and 3 mol% of diethylene glycol was used. The polyester short fiber web was heat-bonded under the same conditions as in No. 7.

The results are shown in Tables 4 and 5. Since the difference in melting point between the core component and the sheath component of the composite binder fiber is less than 30 ° C., the deodorant property, the antibacterial property and the mite-proof property are all inferior. In addition, the shape retention of the web was insufficient.

[0069]

[Table 4]

[0070]

[Table 5]

[0071]

According to the core-sheath type composite binder fiber of the present invention, it is possible to produce a heat-bonding treated fiber product having excellent deodorant property, antibacterial property, anti-mite property and high washing durability. You can

[Brief description of drawings]

FIG. 1 is a schematic side view showing a deodorizing performance measuring device used for evaluation of the fiber of the present invention.

[Explanation of symbols]

 1 sensor 2 measurement sample 3 ion meter 4 recorder 5 container

Claims (5)

[Claims] 1. A core component made of a thermoplastic polymer and 3% by weight or more of a deodorant, 0.1% by weight or more of an antibacterial agent and / or 0.2% by weight of an anti-miticant agent, based on the whole composite fiber. A sheath component made of a thermoplastic polymer mixed and contained as above, and the melting point of the thermoplastic polymer constituting the sheath component is
30 above the melting point of the thermoplastic polymer that constitutes the core component
A core-sheath type composite binder fiber characterized by being lower than ℃. 2. The deodorant is intimately mixed fine particles composed of zinc oxide and silicon dioxide, and the mixing ratio thereof is 1: 3 to.
The core-sheath type composite binder fiber according to claim 1, wherein the average primary particle diameter of the mixed particles is 3: 1, the average primary particle diameter is 5 to 30 nm, and the average particle diameter is 3 μm or less. 3. The antibacterial agent is antibacterial microparticles containing silver ions as an active ingredient and having a particle size of 3 μm or less.
The core-sheath type composite binder fiber described. 4. A tick-proofing agent is represented by the following general formula (I) or (I
The core-sheath type composite binder fiber according to claim 1, which is a compound represented by I). [Chemical 1] (In the formula, R represents a hydrogen atom or a hydroxyl group, and X ₁ , X ₂
And X ₃ may be the same or different and each represents a single bond or an alkylene group having 1 to 3 carbon atoms, and Y is
O-, -CO-, -COO- or -CHOH- is shown.
However, the case where Y is —COO—, X ₂ is a single bond, and X ₃ is a single bond or a methylene group is excluded. ) 5. The weight ratio of the core component and the sheath component is 30:70 to.
The core-sheath type composite binder fiber according to any one of claims 1 to 4, which is 70:30.