JP2003073974A - Heat-preservable fiber structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-preservable fiber structure having an exothermic property caused by the adsorption of water molecules and durability in higher levels, and further having a soft feeling. SOLUTION: This heat-preservable fiber structure comprises a fiber having the exothermic property caused by the adsorption of the water molecules, obtained by fixing a water-absorbing polymer including a softening and smoothening agent on the surface of the fiber. The fiber structure has 2-10% hygroscopicity, <=5 s dropped water-absorbing time, 5-30 exothermic energy index, and >=80% retention of the properties after laundry of 50 times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-retaining fiber structure having a durable water molecule adsorption heat generation performance and a soft texture.

[0002]

2. Description of the Related Art Synthetic fibers such as polyester fibers and nylon fibers are widely used because they have excellent physical and chemical properties, but on the other hand, they have low water absorption and hygroscopicity, and therefore they are not suitable for clothing. When used as such, there are drawbacks that stickiness and stuffiness are likely to occur at the time of wearing and the heat retaining property is low, and improvement is desired.

In order to improve this, Japanese Patent Publication No. 60-349
As disclosed in Japanese Patent Publication No. 79-79, synthetic fibers are graft-polymerized with acrylic acid or methacrylic acid, and Japanese Patent Publication No. 58-4
As disclosed in Japanese Patent No. 6589, a method of polymerizing a radical-polymerizable hydrophilic monomer on a polyester fiber has been proposed.

However, these conventional methods have drawbacks such as insufficient performance and durability and a hard texture.

Further, in order to solve these problems, vinylcarboxylic acid and / or vinylsulfonic acid is used as a method for obtaining a fiber material having a durable hygroscopic property, water absorbing property, antistatic property and a soft texture. JP-A-8-209540 discloses a method of polymerizing a treatment liquid in which the weight ratio of a monomer to a divinyl monomer is 1: 1 to 20: 1 on the surface of a fiber material.
It has been proposed in the publication. Although durability can be obtained by this method, higher performance and durability have been desired.

[0006]

SUMMARY OF THE INVENTION In view of the background of the prior art, the present invention has a heat-retaining fiber structure having a higher level of water molecule adsorption heat generation performance and durability performance and having a soft texture. Is intended to be provided.

[0007]

The present invention employs the following means in order to solve the above problems. That is, the heat-retaining fiber structure of the present invention is a fiber structure composed of fibers having water molecule adsorption exothermic performance obtained by fixing a water-absorbing polymer containing a softening / smoothing agent on the fiber surface. Moisture absorption rate is 2% or more and 10% or less, dripping water absorption time is 5 seconds or less, exothermic energy index is 5 or more 3
0 or less, and the performance retention rate after 50 washes is 80
% Or more.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The fiber structure of the present invention is characterized in that a compound having water molecule adsorption exothermic performance is attached to the fiber surface. That is, the water-absorbent polymer is a composition (A) containing at least 60% by weight of the compound represented by the general formula [I], a higher hydrocarbon having 25 to 33 carbon atoms, and a polyhydric alcohol having 3 to 6 carbon atoms. And an ester of a fatty acid having 14 to 18 carbon atoms, having 12 to 1 carbon atoms
A composition which is a mixed composition of at least one compound selected from the group consisting of an aliphatic amide obtained by the reaction of a fatty acid of 7 with an amino alcohol, a water-soluble silicone compound, and a polyoxyethylene-based surfactant (B ) Is adhered. When attaching such a mixture to a fibrous structure, an aqueous solution or an aqueous dispersion of the mixture is used.

[0009]

[Chemical 2]

The exothermic energy index of the mixture-attached fiber structure is 5 or more and 30 or less, more preferably 7 or less.
It should be 20 or less. If the exothermic energy index is less than 5, the exothermic effect cannot be realized. However, if the heat generation energy exceeds 30, the amount of heat generated is too large, the amount of perspiration increases, the temperature inside the clothes rises more than necessary, and a comfortable feeling cannot be obtained. When the exothermic energy index is 5 or more and 30 or less, it is possible to provide a very warm and comfortable textile structure such as clothes, padding, and underwear.

In order to make the exothermic energy index 5 or more, it is necessary to deposit the composition (A) and the composition (B) described later on the fiber surface in an amount of 1% by weight or more.
In order to make the exothermic energy index 30 or less, it is necessary to deposit the composition (A) and the composition (B) on the fiber surface in an amount of 20% by weight or less. Also, in terms of texture,
Even within the range of such an amount of adhesion, it is possible to provide the one having a more preferable texture when the amount is as small as possible.

The exothermic energy index referred to in the present invention is an exothermic energy of water molecule adsorption compared with a 100% polyester material, and is a comparative value when the 100% polyester material is 1. Specifically, it is determined as follows. That is, 3 g of a sample having a width of about 3.5 cm is wrapped around a thermometer or a thermocouple measurement unit, and the temperature is 30 degrees Celsius x 30% humidity.
The temperature is measured after standing for 12 hours or more in the RH environment.
Next, up to an environment of 30 degrees Celsius and 90% humidity, 3% humidity
The temperature is measured every minute for 4 hours after that while changing at a rate of / min. After the measurement, a value obtained by integrating the temperature curve is obtained as the amount of heat generation energy and expressed by the following formula.

Heat generation energy index = heat generation energy of sample / heat generation energy of polyester taffeta (attached cloth for JIS dyeing fastness test).

The composition (A) used in the present invention means a monomer represented by the above general formula [I] (hereinafter referred to as "compound 1").
60 to 90% by weight and 10 to 10% acrylonitrile
It is a copolymer mainly composed of 40% by weight.

The compound 1 mentioned here is polyalkylene glycol acrylates or polyalkylene glycol methacrylates, such as polyethylene glycol (hereinafter referred to as PEG) acrylate and P.
EG methacrylate, PEG polypropylene glycol acrylate, PEG polypropylene glycol methacrylate, methoxy PEG acrylate, ethoxy PEG methacrylate, propoxy PEG acrylate, chlorinated PEG acrylate, phenoxy PEG acrylate, naphthoxy PEG acrylate, hydrogen sulfide PEG acrylate, etc. are used. It

Further, the composition (A) comprises a vinylcarboxylic acid and / or a vinylsulfonic acid (hereinafter referred to as "compound 2").
And the following general formula [II]

[0017]

[Chemical 3]

And / or the following general formula [III]

[0019]

[Chemical 4]

There is no problem even if two or more kinds of divinyl monomers represented by (hereinafter referred to as "compound 3") and a polymerization initiator are used. In the above general formulas [II] and [III], X is H or CH ₃ , but from the viewpoint of safety, X is C
It is preferable to use H ₃ . Further, the mixing ratio of the compound 2 and the compound 3 is preferably 1:20 to 1: 1 by weight ratio, and more preferably 1: 2. When this weight ratio exceeds 1:20, the hygroscopicity obtained tends to remain at a low level, while when it is less than 1: 1 the polymer network structure does not proceed sufficiently and the durability is low. Tends to get worse. From the viewpoint of antistatic property, it is preferable that the compound 3 is used in a larger amount than the compound 2 in terms of weight ratio. The amounts of compound 2 and compound 3 used can be arbitrarily determined according to the purpose.

Here, the pH of vinyl sulfonic acid is low,
Since cotton and nylon become brittle when used as they are, pre-neutralized sodium vinyl sulfonate is used. In addition, deodorizing performance can be imparted by using zinc vinyl sulfonate.
As the vinyl sulfonic acid, for example, acrylamidomethylpropane sulfonic acid is preferable from the viewpoint of water molecule adsorption heat generation performance.

As the polymerization initiator, a usual radical initiator can be used. For example, an inorganic polymerization initiator such as ammonium persulfate, potassium persulfate, hydrogen peroxide, or 2,
Organic systems such as 2'-azobis (2-amidinopropane) dihydrochloride, 2,2'-azobis (N, N-dimethyleneisobutyramidin) dihydrochloride, 2- (carbamoylazo) isobutyronitrile A polymerization initiator may be used. Further, a water-insoluble polymerization initiator such as benzoyl peroxide or azobisisobutyronitrile may be emulsified with a surfactant such as anion or nonion before use. Ammonium persulfate is preferably used in terms of cost and ease of handling. Further, in order to increase the polymerization efficiency, a so-called redox initiator, which is a combination of a peroxide as a polymerization initiator and a reducing substance, may be used.
Examples of the peroxide include ammonium persulfate and potassium persulfate, and examples of the reducing substance include a reaction product of sodium sulfoxylate and formalin and hydrosulfite.

The composition (B) referred to in the present invention is a mixed composition containing at least one of the following compounds 4 to 7 and the compound 8.

Compound 4: A higher hydrocarbon having 25 to 33 carbon atoms. When the carbon number is 24 or less, the melting point is low and the smoothness is poor. On the contrary, when the carbon number is 34 or more, the melting point is high and the texture is impaired.

Compound 5: An ester composed of a polyhydric alcohol having 3 to 6 carbon atoms and a fatty acid having 14 to 18 carbon atoms, for example, an ester of glycerin and the like with fatty acids obtained from beef tallow such as vermic acid, stearic acid and the like is preferable. .

Compound 6: An aliphatic amide obtained by reacting a fatty acid having 12 to 17 carbon atoms with an amino alcohol, for example, an aliphatic amide derivative with HOCH ₂ CH ₂ NH ₂ or the like is preferable.

Compound 7: A water-soluble silicone compound, for example, a compound having a methylsiloxane having 5 to 80 repeating units of methylsiloxane or a methylhydrogensiloxane and a polyoxyethylene segment having 12 to 25 repeating units of ethylene oxide is preferable.

Compound 8: Polyoxyethylene-based surfactant, for example, the number of moles of ethylene oxide added is 10,
Alkylamine ethylene oxide adducts having an alkyl group having 9 to 17 carbon atoms, an alkyl ether type surfactant having an ethylene oxide addition mole number of 12 to 22 and an alkyl group of 9 to 18 carbon atoms, and a carbon number of 9 to 12 Of ethylene oxide to alkylphenols with alkyl groups
An alkylphenol ether type surfactant added with 0 to 14 mol, or a mixture thereof is preferable.

The treatment liquid for treating the fiber structure used in the present invention to attach the compound having water molecule adsorption exothermic performance to the fiber surface is basically the composition (A) and the composition. Although it is composed of (B), a finishing agent, for example, a water repellent, a flame retardant, an antibacterial deodorizing agent, or the like may be added if necessary. Further, if necessary, natural products are preferably added, and as plants, for example, cotton, hemp, bamboo, moon peach, tea, or as those obtained from animals, for example, wool, silk,
As chitin, chitosan, squalane, or ore, for example, an ore constituent element such as smectite or tourmaline or a negative ion generating substance can be used. Alternatively, or after the above treatment, a treatment liquid containing only natural products can be prepared, impregnated into the fibers, and applied by dry heat treatment. The hygroscopicity of these natural products further enhances the heat retaining effect.

As such a treatment method, for example, a treatment liquid composed of the composition (A) and the composition (B) is treated by a usual treatment method such as a padding method, a spray method, a kiss roll coater or a slit coater. There is a method in which after being applied to the polymer, it is polymerized by a dry heat treatment, a wet heat treatment, a microwave treatment, an ultraviolet treatment, or the like to be fixed on the fiber surface. It is also preferable to adjust the applied amount, for example, by treating with a vacuum dehydrator.

Further, synthetic fibers such as polyester, nylon and acrylic can be applied at the stage of spinning and spinning. For example, in the case of polyester filament, when POY (semi-stretched yarn) is spun by the melt spinning method, the composition (A) and the composition (B) are applied together with a spinning oil,
The compound is firmly adhered to the fiber by the dry heat treatment in the subsequent drawing step, and durable water molecule adsorption exothermic performance is obtained. In the case of acrylic, the composition (A) and the composition (B) are prepared by spinning, drawing and washing with a wet spinning method.
The treatment liquid consisting of 0.05 to 5% by weight is adhered to the surface of the fiber, and after being subjected to a dry densification treatment, a steam treatment and a drying step, it is firmly adhered to the fiber, so that it has durability similar to that of polyester. A water molecule adsorption exothermic performance with certainty is obtained.

Regarding the water molecule adsorption exothermic performance of the fiber structure of the present invention, it is important from a practical viewpoint that the performance retention rate after 50 times of repeated washing by the method described below has a durability of 80% or more.

The durability is improved by the action of the composition (B). That is, the composition (B) smoothes the fiber surface and reduces the friction between the fibers, and as a result, the degree of freedom of the fibers in the fiber structure is significantly increased, and the fiber structure is washed during washing. It is possible to soften the external force applied to the object, prevent coarse hardening of the texture of the fiber structure, and provide a more flexible and durable fiber structure.

The fiber structure of the present invention preferably has a moisture absorption rate of 2% or more and 10% or less in order to obtain sufficient water molecule adsorption heat generation performance. If the moisture absorption rate is less than 2%,
The water molecule adsorption heat generation performance is not sufficiently obtained, and the heat retention becomes poor. Also, it causes stickiness and stuffiness when worn. When the moisture absorption rate is higher than 10%, the moisture taken into the fiber structure gives a strong cold sensation when it comes into contact with the skin, resulting in poor heat retention. The moisture absorption rate is more preferably 3% or more and 10% or less.

Examples of the fiber material used in the present invention include polyester fibers such as polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate, polyester fibers obtained by copolymerizing a third component with polyester, nylon 6 and nylon 66. Polyamide fiber, polyamide fiber obtained by copolymerizing polyamide with a third component, acrylic fiber containing polyacrylonitrile as a main component, polyolefin fiber such as polyethylene and polypropylene, polyvinyl chloride fiber, cellulose fiber, protein fiber Etc., and mixed products of these are also used.

The fibrous structure in the present invention is composed of the above fibrous materials, and has a form such as a spun yarn or a filament yarn, a cotton pad for a garment, a batting for a futon, a textile fabric such as a woven or knitted fabric. Etc. These woven and knitted fabrics,
As non-woven fabric, padded cotton for clothes, and batting for futon, mixed fiber,
Also included are fiber fabrics that have been subjected to mixed spinning, mixed weaving, mixed knitting, mixed weaving, mixed knitting, and the like.

The fiber structure in the present invention has a content of fibers having water molecule adsorption exothermic performance of at least 30.
% Or more is preferable. More preferably, 50
% Or more. When it is less than 30%, not only sufficient water molecule adsorption exothermic performance cannot be obtained, but also sufficient performance cannot be obtained with respect to other necessary properties such as water absorption and contact temperature / cooling feeling.

These fiber structures are effective not only for underwear that directly touches the skin, but also for items such as blouson, lining, socks, sweaters, fleeces, supporters, belly rolls, and cotton padding for clothes. It is ideal for all genres such as uniforms and sports. For supporters and belly rolls, it is also effective as a countermeasure against coldness by cooling in the summer, and if it is integrated with underwear and socks, the appearance will be impaired even in fashionable women's clothes that fit the body. Instead, you can protect yourself from the cold. Also, by using it for a futon, sheets, kotatsu cover, batting for a futon, rug such as carpet, car seat or vehicle seat, etc., a warm and comfortable living environment can be obtained. Also,
Energy saving effect can be expected.

The above clothes and the like can be used in combination to obtain a further heat-retaining effect. However, when the heat energy exceeds 30, the calorific value is too large and the amount of perspiration increases, so that the temperature inside the clothes increases. It rises more than necessary and does not provide a comfortable feeling. The fiber structure used in the present invention preferably has a fiber packing degree per unit volume of 30 or more and 200 or less, and more preferably 50 or more and 180 or less. When the fiber filling degree is less than 30, it is too bulky and unsuitable for clothes, and when the fiber filling degree is more than 200, the air layer having a heat retaining effect is reduced and it becomes impossible to retain the generated heat. Tend.

The thickness of the fiber structure is preferably 0.2 mm or more and 15 mm or less under a load of 7 g / cm ² . More preferably, it is 2 mm or more and 8 mm or less in the case of woven or knitted fabric or non-woven fabric, and 5 m in the case of padded cotton in clothes.
It is m or more and 10 mm or less.

The thickness is 0.2 under a load of 7 g / cm ^2.
If it is less than mm, the fiber structure is too thin, so sufficient heat retention cannot be obtained, and if it is greater than 15 mm,
It is hard to wear and hard to say that it is comfortable.

When the hygroscopicity is increased, it feels cold when it is touched by a hand or a body, and is not suitable for heat insulating clothing. In the present invention, in order to prevent this phenomenon, the amount of contact heat transfer (q-max) on the surface of the cloth having water molecule adsorption exothermic performance in contact with the skin.
Should be 0.12 W / cm ² or less. q-ma
As a method of setting x to 0.12 W / cm ² or less, for example, the contact surface is provided with unevenness that does not hinder the touch,
It is obtained by making a fabric structure with a small contact area. Further, a double structure using fibers having low hygroscopicity only on the contact surface can also be obtained. For example, q-max is 0.12 W / c by reducing the contact area by raising or blistering.
m ² or less, but the present invention is not limited to these, and q-max is 0.12 W / c by any method.
It may be set to m ² or less. q-max is preferably 0.1
W / cm ² or less, more preferably 0.08 W / c
m ² or less.

In the fibrous structure of the present invention, it is necessary that the water absorption time on the surface in contact with the skin is 5 seconds or less. When the drip water absorption time is longer than 5 seconds, the sweat processing property at the time of sweating is inferior, a sticky feeling is generated, and the wearing comfort is inferior.
The dripping water absorption time is preferably 3 seconds or less, more preferably 1.5 seconds or less.

The batting for a futon using the fibrous structure of the present invention preferably has a compressive elastic modulus of 70% or more and 90% or less. If it is less than 70%, the heat retention is poor, and 90%
If it is larger than this, it will be less familiar to the body and will not be comfortable when worn.

[0045]

EXAMPLES The present invention will be described more specifically below with reference to Examples and Comparative Examples.

The various performances described in the examples were evaluated by the following methods.

[Washing] 45 in an automatic reversing spiral electric washing machine (manufactured by Toshiba Corp .; with the same performance as VH-1150)
500 g of 45 cm × 45 cm test cloth and 40 ± 2 ° C.
25% of a 2% weakly alkaline synthetic detergent (JIS K-3371 weakly alkaline, type 1) liquid was added, and the cloth was washed under strong conditions for 25 minutes. Then, after dehydration for 30 seconds with a centrifugal dehydrator, rinsing was performed for 10 minutes while allowing normal temperature water to overflow. Then, it is dehydrated again for 30 seconds, and rinsed under the same conditions for 10 minutes. In Table 1, this is 1
Repeated 0 times and labeled as 50 times of washing.

[Amount of Resin Adhesion] Amount of Resin Adhesion [%] = [(A−B) / B] × 100 where A: weight of fabric after processing B: weight of fabric before processing Here, the weight of fabric is 2 at 20 ℃ × 65% RH
It means the weight when left for 4 hours.

[Hygroscopicity (ΔMR)] ΔMR (%) = MR ₂ -MR ₁ Here, MR ₁ is the moisture absorption rate (% when left in an absolutely dry state at 20 ° C. × 65% RH atmosphere for 24 hours. ) Good,
It is equivalent to the state of being in the clothes dance, that is, the environment before wearing. In addition, MR ₂ is 30 ° C x
This is the moisture absorption rate (%) when left in a 90% RH atmosphere for 24 hours, and corresponds to the environment inside the clothes in the exercise state.

ΔMR is represented by a value obtained by subtracting the value of MR ₁ from MR ₂ , and corresponds to how much stuffiness in clothes is absorbed when exercising after wearing clothes. It can be said that the higher the ΔMR value, the more comfortable. In general,
The ΔMR of polyester is 0%, nylon is 2%, cotton is 4%, and wool is 6%.

[Exothermic energy index] 3 g of a sample having a width of about 3.5 cm was wound around a measuring part of a thermometer or a thermocouple, and the temperature was measured after leaving it for 12 hours or more in an environment of 30 degrees Celsius and humidity of 30% RH. To do. Next, 30 degrees Celsius x 90% humidity RH
The environment is changed at a rate of 3% / min.
The temperature is measured every minute for up to 4 hours. After the measurement, a value obtained by integrating the temperature curve is obtained as the amount of heat generation energy and expressed by the following formula. Heat generation energy index = heat generation energy of sample / heat generation energy of polyester taffeta (attached cloth for JIS dyeing fastness test).

[Dripping water absorption time] JIS L 1096
The test was carried out according to the "General textile test method".

Three test pieces of about 15 cm × 15 cm were sampled, and the test pieces were fixed to an embroidery frame or beaker having a diameter of 10 cm or more with the surface facing downward so as not to apply extra tension. Distilled water was added drop by drop from 5 cm above, and the time from when the water drops were dropped to when the water drops on the test piece stopped special reflection was measured at three arbitrary points.
The average value of 3 sheets was used as the drop water absorption time.

[Contact heat transfer amount (q-max)] At room temperature of 2 degrees Celsius using a Thermo Lab II measuring machine manufactured by Kato Tech Co., Ltd.
BT-BOX was adjusted to 30 degrees Celsius in an environment of 0 degree and humidity of 65% RH, and BT-B was placed on a well-humidified sample.
OX (pressure 10 g / cm ² ) is applied, and the heat flow rate per unit area at a temperature difference of 10 degrees Celsius is measured.

[Compression Modulus] KES manufactured by Kato Tech Co., Ltd.
-Using FB3 compression tester, room temperature 20 degrees Celsius, humidity 65
The measurement was performed in the environment of% RH. Using a compression plate with a compression area of 2 cm ² , a maximum load of 50 g / c at a speed of 50 seconds / mm.
After compressing to m ^2, the resistance value when the load was removed at the same speed was plotted on the chart, and the ratio of the area from the maximum load to the load 0 to the area from the load 0 to the maximum load was defined as the compression elastic modulus. did.

[Effect of heat generation (effect of improving heat retention)] The sewn product is worn in an environment of room temperature of 5 degrees Celsius and humidity of 65% RH, and after exercise of 75 W for 15 minutes with an ergometer, the sewn product is taken off, Inside out, the temperature on the back side was measured with a thermal infrared image and the feeling of wearing was confirmed.

[Feeling] The feel of gripping the fabric was evaluated on the basis of five grades: very soft, soft, slightly hard, hard, and very hard.

[Fiber filling degree] Obtained by the following formula. Fiber filling degree = basis weight (g / m ² ) / thickness (mm) [Thickness] The thickness was measured according to JIS L 1096 "General woven fabric test method".

(Example 1) AN 94.5 mol%, methyl acrylate 5 mol%, sodium styrenesulfonate 0.5
3.3 dte with acrylonitrile fiber consisting of mol%
x and a fiber length of 76 mm were used to obtain a spun yarn with a wool count of 1/60.

On the other hand, methoxy PEG methacrylate 7
0% by weight and 30% by weight of AN were polymerized in an aqueous solution having a total monomer concentration of 22% to synthesize a water absorbing agent.

Further, 10% of paraffin mixed with C ₂₆ H ₅₄ and C ₂₇ H ₅₆ in equal amount, and C ₁₆ H ₃₃ COOH in pentaerythritol.
And 5% alcohol ester obtained by reacting a mixed fatty acid with C ₁₈ H ₃₇ COOH 4: 6, and further 3% fatty acid amide compound obtained by reaction between diethanolamine and C ₁₂ H ₂₅ COOH and ethylene oxide 2.5% of alkyl amine having 12 moles of addition and 12 carbon atoms,
A softening agent having 2.5% of alkyl ether having 12 moles of ethylene oxide added and 9 carbon atoms, and 2% of nonylphenol ether type surfactant having 10 moles of ethylene oxide added and the remaining 75% water. Prepared.

The 1/60 spun yarn was cheese-dyed with a package dyeing machine by a conventional method and then washed with hot water once to obtain 3.5 g / l of the water-absorption treating agent and 1.5 g / l of the softening agent prepared in advance. The spun yarn 1 was dipped in the aqueous solution of 45 ° C. under the treatment liquid 10 for 10 minutes. The treatment system is sucked and dehydrated until the amount of adhering water reaches 50%, and then,
Dried in a cheese dryer for 20 minutes at 80 degrees Celsius. Using the treated yarn obtained here, a knitted fabric of Tenjiku having a basis weight of 135 g / m ² was knitted. After knitting, a drier was used to set for 30 seconds at 90 degrees Celsius, then men's underwear was sewn and a predetermined performance evaluation was performed. Further, in order to check the durability, a predetermined performance evaluation was performed after 50 times of washing. At this time, the knitted fabric had a thickness of 1.32 mm and a fiber filling degree of 122. The results are shown in Table 1.

(Example 2) 84 dtex for warp and weft
Woven fabric using -36F polyester yarn, AM
PS 20 g / l, X: -CH ₃ in the general formula [II],
40 g / l compound of n = 23, 2 g of ammonium persulfate
After immersing in the treatment liquid consisting of 1 / l, it was squeezed with a mangle set to a pickup rate of 80%, and dried with a dryer at 120 ° C. for 2 minutes. Immediately after drying, it was treated with a heating steamer at 105 ° C. for 5 minutes, washed with hot water and dried. Next, 3% of a fatty acid amide compound obtained by the reaction of diethanolamine and C ₁₂ H ₂₅ COOH and 2% of a nonylphenol ether type surfactant having an ethylene oxide addition mole number of 10%, and the remaining 95% is water After soaking in the agent for 10 minutes, it was dried and set at 170 ° C. for 1 minute with a dryer. The woven fabric thus obtained was lightly napped and sewn as a lining for women's slacks, and predetermined performance evaluation was performed. Also,
In order to check durability, a predetermined performance evaluation was performed after 50 times of washing. At this time, the woven fabric had a thickness of 0.85 mm and a fiber filling degree of 112. The results are shown in Table 1.

(Example 3) With respect to acrylic fiber spun, drawn and washed with water by the wet spinning method, R = CH ₃ , R ^l = OCH ₃ , l = 23 and m = 0 in the general formula [I]. Compound and C ₂₆ H ₅₄ , C ₂₇ H ₅₆ equivalent paraffin 1
0%, C ₁₆ H ₃₃ to pentaerythritol COOH and C ₁₈ H
₃₇ % COOH was obtained by reacting a mixed fatty acid of 4: 6 with an alcohol ester of 5%, and further, a fatty acid amide compound obtained by a reaction of diethanolamine with C ₁₂ H ₂₅ COOH was 3% and the number of moles of ethylene oxide added was 3%. After 10 minutes of immersion in an aqueous solution consisting of 2.5% of an alkylamine having 12 carbon atoms and 2.5% of an ethylene oxide-added mole number of 10 and a nonylphenol ether type surfactant, 20 minutes at 80 degrees Celsius. Dry in a cheese dryer,
It was firmly attached to the fiber. Thus 2.2 dt
As the acrylic staple of ex, 1/60 acrylic spun yarn having water molecule adsorption heat generation performance was obtained. A circular knitted fabric was knitted using this spun yarn, and relaxation, scouring, dyeing and drying were carried out in accordance with a usual dyeing method for circular knitted fabric. The heat generation energy index of this circular knitted fabric was 20, and the amount of contact heat transfer to the skin side (q-max) was 0.048. As a result of sewing a knee supporter with this circular knitted fabric and performing a predetermined evaluation,
It was warm and easy to move, and was judged to be an excellent supporter. Further, in order to examine the washing durability, the results of predetermined evaluation after repeated washing 50 times are also shown in Table 1.

(Example 4) The thickness of a single yarn is 2.2 dtex.
A non-woven fabric made of polypropylene filament yarn
MPS 20 g / l, X: -C in the general formula [II]
H _3, compound 10 g / l of n = 23, in the general formula _{[III] X: -CH 3,} m + n = 30 compound 30 g / l,
After immersion in a treatment liquid having a composition of 2 g / l of ammonium persulfate, it was squeezed with a mangle set to a pickup rate of 80% and dried with a dryer at 120 ° C. for 2 minutes. Immediately after drying, treat with a heating steamer at 105 degrees Celsius for 5 minutes,
It was washed with hot water and dried. Then diethanolamine and C ₁₂
Fatty acid amide compound 3 obtained by reaction with H ₂₅ COOH
% And ethylene oxide addition mole number 10 nonylphenol ether type surfactant 2% and the remaining 95% is immersed in a softening agent which is water for 10 minutes, and then dried for 1 minute at 170 degrees Celsius in a dryer and set. did. At this time, the nonwoven fabric had a thickness of 1.53 mm and a fiber filling degree of 52. This non-woven fabric was laminated as a padded cotton between the front and back fabrics, and a blouson was sewn. Table 1 shows the result of the predetermined evaluation. Table 1 also shows the results of predetermined evaluation after repeated washing 50 times in order to examine the washing durability.

(Example 5) In the step of obtaining a polyester filament by the melt spinning method, when POY (semi-drawn yarn) is spun, R = CH ₃ , R in the general formula [I] is used.
3% of a fatty acid amide compound obtained by reacting a compound of ^l = OCH ₃ , l = 23, m = 0 with diethanolamine and C ₁₂ H ₂₅ COOH, and the number of moles of ethylene oxide added is 1
2.5% of an alkylamine having 12 carbon atoms and having 12 carbon atoms, 2.5% of an ethylene ether addition mole number of 12 and 9 carbon atoms, and a nonylphenol ether type interface having an ethylene oxide addition mole number of 10 After immersing in an aqueous solution containing 2% of activator for 10 minutes, it was firmly attached to the fiber by dry heat treatment in a normal stretching process. Then, the short fibers obtained by the usual process are 70
%, 30% of regular polyester short fibers not subjected to such processing were mixed to form a futon batting. A quilt was prepared using the woven fabric obtained in Example 2 as the futon side. At this time, the compression elastic modulus of the futon was 85%. The predetermined evaluation was performed, and in order to further check the washing durability, the predetermined evaluation was performed even after repeated washing 50 times. The results are shown in Table 1.

Comparative Example 1 In Example 1, 30% by weight of methoxy PEG methacrylate and AN were used as the water absorbing agent.
70% by weight was used for synthesizing, and the same treatment was performed to prepare a sample, and a predetermined evaluation was performed. The results are shown in Table 1.

(Comparative Example 2) An underwear treated in the same manner as in Example 1 except that the softening and smoothing agent was not applied was prepared. Table 1 shows the result of the predetermined evaluation.

(Comparative Example 3) 84 dtex for warp and weft
A sample was prepared by using the processed polyester yarn of -36F and performing the same treatment as in Example 2. At this time, the woven fabric had a thickness of 0.32 mm and a fiber packing degree of 319. Table 1 shows the result of the predetermined evaluation.

(Comparative Example 4) In Example 3, a similar cloth was obtained by using a regular acrylic fiber which was not treated to prepare a supporter. Table 1 shows the result of the predetermined evaluation.

(Comparative Example 5) In Example 2, a woven fabric which is not lightly napped is used as a lining for women's slacks, and predetermined evaluation results are shown in Table 1.

[0072]

[Table 1]

From Table 1, in Comparative Example 1, sufficient water absorption cannot be obtained and a large heat retaining effect cannot be obtained. Comparative Example 2
Durability was not obtained. In Comparative Example 3, the fiber filling rate was too high and the heat retention was poor, and in Comparative Example 4, a sufficient moisture absorption rate was not obtained and the heat retention effect was not obtained. Comparative Example 5
Had a large amount of contact heat transfer, and felt cold when worn.

[0074]

EFFECTS OF THE INVENTION According to the present invention, a heat retaining fiber structure having a durable water molecule adsorption heat generation performance and a soft texture can be obtained.

Continued front page    F-term (reference) 4L033 AB05 AB06 AB07 AB09 AC02                       AC07 AC09 AC15 CA20

Claims (7)

[Claims] 1. A fiber structure comprising fibers having water molecule adsorption exothermic performance obtained by fixing a water absorbing polymer containing a softening / smoothing agent on the surface of the fiber, the moisture absorption rate of the fiber structure being 2% or more 10 %, The dripping water absorption time is 5 seconds or less, the exothermic energy index is 5 or more and 30 or less, and the washing is 50
A heat-retaining fiber structure having a performance retention rate after rotation of 80% or more. 2. The heat-retaining fiber structure according to claim 1, wherein the water-absorbing polymer is a composition containing at least 60% by weight of the compound represented by the general formula [I]. [Chemical 1] 3. The softening agent is a higher hydrocarbon having 25 to 33 carbon atoms, an ester composed of a polyhydric alcohol having 3 to 6 carbon atoms and a fatty acid having 14 to 18 carbon atoms, and 12 carbon atoms.
~ 17 is a mixed composition of a polyoxyethylene-based surfactant and at least one compound selected from the group consisting of an aliphatic amide obtained by the reaction of a fatty acid with an amino alcohol and a water-soluble silicone compound. The heat retaining fiber structure according to claim 1. 4. The water-molecule adsorption heat generation performance of the fiber structure.
Knitting containing at least 30% by weight of fibers having
Material or non-woven fabric, and load 7g / cm ²Below
The unit thickness is 0.2 mm or more and 15 mm or less.
The degree of fiber filling per product is 30 or more and 200 or less
The heat-retaining fiber according to any one of claims 1 to 3,
Fiber structure. 5. The contact heat transfer amount of the fiber structure is 0.12.
The heat retaining fiber structure according to claim 4, which has a W / cm ² or less. 6. The padding for clothes, wherein the fiber structure contains at least 30% by weight of the fiber having the water molecule adsorption exothermic performance, and has a thickness of 0.5 mm or more under a load of 7 g / cm ^2. The heat-retaining fiber structure according to any one of claims 1 to 3, wherein the fiber filling degree per unit volume is 15 mm or less and 30 or more and 200 or less. 7. The fiber structure is a batting for a futon containing at least 30% by weight or more of the fiber having the water molecule adsorption exothermic performance, and has a compression elastic modulus of 70% or more and 90% or less. The heat retaining fiber structure according to any one of claims 1 to 3.