JP2003089976A - Skin-touching cloth material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin-touching cloth material producible by simple processing, having excellent pyrogenic and heat retaining properties and antibacterial properties and suitably usable in medical field. SOLUTION: This skin-touching cloth material is a sheet-like structure obtained by being adhered highly hygroscopic particulates and is characterized by having >=3 deg.C maximum temperature-rise when absorbing moisture and/or water, preferably, >=30 min exothermic period when absorbing moisture and/or >=1 min exothermic period when absorbing water and, in addition, preferably >=8 deg.C maximum temperature-rise when absorbing water.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a skin cloth material which can be used as a hot compress in the medical field.

[0002]

2. Description of the Related Art Conventionally, hot compresses include towels dipped in hot water, squeezed towels, and warmers. However, the former has a short temperature duration, requires frequent replacement, is not portable, is bulky, and requires the hand of another person. On the other hand, the latter also has improved temperature duration and portability, but has problems in bulkiness and skin fit. In recent years, as a disposable body warmer, there is a body warmer in which several kinds of inorganic powders are encapsulated in a cloth bag and the capsules are crushed by hand before use to utilize the heat of chemical reaction of the inorganic powders. However, after a certain amount of time, these "disposable body warmers" need to be massaged in order to regenerate the heat of chemical reaction, which is why it is troublesome to take them out from the affected area, perform the work, and attach them to the affected area again. .

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a skin cloth material which can be manufactured by simple processing and is excellent in heat retention.

[0004]

The present invention has the following technical constitution for solving the above problems. That is, 1. A skin cloth material, which is a sheet-like structure to which highly hygroscopic fine particles are adhered, and has a maximum temperature rise of 3 ° C. or more during moisture absorption and / or water absorption.

2. The skin cloth material according to the first aspect is characterized in that the heat generation during moisture absorption is maintained for 30 minutes or more and / or the heat generation during water absorption is maintained for 1 minute or more.

3. The maximum temperature rise at the time of absorbing water is 8 ° C. or higher, and the skin cloth material according to the first or second aspect.

4. 4. The skin cloth material according to any one of the first to third aspects, wherein the highly hygroscopic fine particles are organic fine particles.

5. The highly hygroscopic organic fine particles are polystyrene-based, polyacrylonitrile-based, polyacrylic acid ester-based, or polymethacrylic acid ester-based vinyl polymers, and have sulfonic acid groups, carboxylic acid groups, phosphoric acid groups, or their metals. The skin cloth material according to the fourth aspect, which is a crosslinked polymer having at least one hydrophilic group of a salt and crosslinked with any of divinylbenzene, triallyl isocyanate or hydrazine.

6. Highly hygroscopic fine particles have an average particle size of 2 μm
The skin cloth material according to any one of the first to fifth aspects, wherein

7. 7. The skin cloth material according to any one of 1 to 6, wherein the highly hygroscopic fine particles are immobilized on the structure through a hydrophilic resin.

8. The mass ratio of highly hygroscopic fine particles to hydrophilic resin is 1/1 to 20/1, and the skin cloth material according to any one of 1 to 7 above.

9. The sheet-like structure is a knitted fabric, a woven fabric, a non-woven fabric, a fleece, a film or a resin molded product composed of a natural fiber, a compound fiber or a mixed fiber thereof, and the contact according to any one of 1 to 8 above. Silk material.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below. The sheet-like structure used in the present invention is a polyester-based, polyamide-based, polyacrylonitrile-based, polyethylene-based, polypropylene-based, polybutylene terephthalate-based, polytetramethylene terephthalate-based, polyurethane-based, polyphenylene sulfide-based synthetic fibers, Chemical fibers such as rayon and acetate,
A structure composed of a knitted fabric, a woven fabric, a non-woven fabric, a fleece, a film- or sheet-shaped resin molded product, or the like, which is made of a natural fiber such as cotton, hemp, silk, wool, and feather, or a mixed material thereof.

Highly hygroscopic fine particles of the present invention (hereinafter referred to as high moisture absorption /
Also referred to as water-absorbing exothermic particles. ) Is not particularly limited in terms of chemical structure as long as it is a fine particle that exhibits exothermicity when absorbing moisture or absorbing water. For example, inorganic type such as hygroscopic silica, or hygroscopic polyurethane type, polyamide type,
It is possible to apply various organic fine particles such as polyester-based and polyacrylate-based, but particularly high moisture-absorption / water-absorption exothermic organic fine particles are preferable, and examples thereof include polystyrene-based, polyacrylonitrile-based, polyacrylic ester-based, and polyacrylic ester-based. A methacrylic acid-based vinyl polymer having a sulfonic acid group, a carboxylic acid group, a phosphoric acid group, or at least one hydrophilic group of metal salts thereof, and having divinylbenzene, triallyl isocyanate, or It is a crosslinked polymer fine particle crosslinked with any of hydrazine. Since the highly hygroscopic fine particles themselves have antibacterial and antibacterial properties, they are suitable as a skin cloth material.

The particle size of the highly hygroscopic fine particles is preferably as small as possible from the viewpoint of moisture absorption / water absorption heat generation rate / heat generation efficiency, uniform adhesion, texture and abrasion resistance, and an average particle diameter of less than 2 μm is more preferable.

The method for applying the highly hygroscopic fine particles of the present invention is a method of directly kneading into a fiber, a film or a resin layer, or coating the surface layer of a knitted fabric, a woven fabric, a non-woven fabric, a fleece, a film and a resin molded product through a binder resin. Examples of the method include attaching by dipping, spraying and the like, but the latter method of attaching via a binder resin is preferable from the viewpoint of moisture absorption / water absorption heat generation rate / heat generation efficiency.

As the binder resin, a usual impregnation method,
Examples of the resin include silicone-based, urethane-based, acrylic-based, polyester-based, polyamide-based, and polyethylene oxide-based resins that can be applied to the padding method, coating method, and spray method, and are not particularly limited, but hydrophilic, that is, hygroscopicity, water absorption. It is desirable to use a type that has excellent properties and moisture permeability, does not inhibit the excellent hygroscopicity and water absorption of the highly hygroscopic fine particles, and has an excellent binder function that can effectively bond and fix the highly hygroscopic fine particles and the structure. As a particularly preferable hydrophilic resin binder, as a hydrophilic segment, a polyalkylene oxide addition type, a polar hydrophilic group type such as a sulfonate or a carboxylate, a hydrophilic silicone resin having amide modification or the like introduced therein, a hydrophilic urethane Examples thereof include resins, hydrophilic polyamide resins, and hydrophilic polyethylene oxide resins, which have high hygroscopicity and moisture permeability of the resin themselves and do not impair water absorption. The moisture permeability of the resin as used herein means the moisture permeability in a non-porous film state. Even in the case of a resin having a high moisture permeability expressed in a microporous film, a binder resin having a low hygroscopicity and a low water absorptivity of the resin itself masks and lowers the excellent moisture absorption / heat generation characteristic of the high moisture / water absorption heat-generating fine particles. In addition, in order to improve the durability, these high moisture absorption / water absorption exothermic fine particles and hydrophilic resin binder are combined with various crosslinking agents such as isocyanate type, methylol type, ethyleneimine type, polyfunctional aziridinyl type, and metal salt type. You may use together in the range which does not reduce the original moisture absorption / water absorption.

The compounding ratio of the highly hygroscopic / water-absorbing exothermic fine particles and the hydrophilic resin and the amount of these adhering to each other greatly influence the hygroscopic / water-absorbing exothermicity. The compounding ratio of the highly hygroscopic / water-absorbing exothermic fine particles and the hydrophilic resin is slightly different depending on the hydrophilic level of the hydrophilic resin, but it is usually desirable to use the compounding ratio of 1/1 to 20/1, preferably 10/1 to 19/1. More preferably, the compounding ratio of 15: 1 to 19/1,
In particular, the smaller the blending ratio of the hydrophilic resin, the better the moisture absorption / water absorption exothermicity can be exhibited. However, when the hydrophilic resin is extremely small, or when the hydrophilic resin is not used in combination, the abrasion resistance of the highly hygroscopic / water-absorbing heat-generating fine particles adhered to the surface of the structure is deteriorated and the particles easily fall off. On the contrary, if the blending ratio of the hydrophilic resin is high, even if it is a hydrophilic resin, high moisture absorption /
Since the moisture absorption / water absorption inherent to the water absorption / heat generation fine particles is often impaired, the moisture absorption / water absorption heat generation rate and the heat generation amount are extremely reduced due to the masking effect. Of course, when the moisture absorption / water absorption of the hydrophilic resin is equal to or higher than that of the high moisture absorption / water absorption exothermic fine particles, the compounding ratio of the hydrophilic resin can be increased.

Since the exothermicity of the skin cloth material of the present invention is based on the heat of adsorption reaction generated when the substance absorbs moisture or absorbs water, the highly hygroscopic / water-absorbing fine particles contained in the sheet-like structure and the combined hydrophilicity. It depends on the hygroscopic ability and / or the water absorbing ability and the amount of adhesion of the resin binder. That is, high moisture absorption /
The finer the water-absorbent particles, and the finer the hydrophilic resin binder having a higher moisture absorption or water absorption level, the larger the heat production due to the adsorbed moisture, the faster the heat generation rate, and the longer the heat retention time. Of course, since such a moisture absorption / water absorption is possessed by the structure substrate alone, in order to realize more effective moisture absorption / water absorption exothermicity, the moisture absorption rate of the applied moisture absorption / water absorption exothermic fine particles (20 ° C., 65% RH ) Is preferably 25% or more, more preferably 40% or more. Further, the combined hydrophilic resin does not impair the hygroscopicity / water absorbency of the moisture absorbing / water absorbing exothermic fine particles as much as possible.
RH) 3 to 50% is preferable. That is, in order to obtain an effective moisture absorption / water absorption exothermicity, the structure having a high degree of moisture absorption / water absorption exothermicity of the present invention has a moisture absorption rate as low as possible, more preferably close to a completely dry (absolute dry) state. It is essential to store it in the state. On the other hand, the structure that has adsorbed moisture at a saturated moisture absorption rate or higher and has completed heat generation is cooled by heat radiation and drops to the initial temperature, but if it is dried again to remove the adsorbed water, the original excellent moisture absorption / Water absorption and exothermicity reappear.

The moisture absorption exothermicity in the vapor phase heats up at an appropriate rate and maintains the exothermicity for a relatively long time, whereas the water absorption exothermicity in the liquid phase gives a rapid exothermicity, while the adsorbed water If the amount is too large, the remarkable heat generation effect may not be obtained, so it is important to control the amount of attached water. In particular, when it is desired to heat rapidly, such as in an emergency, the water absorption and heat generation function of the present invention is effective, and when combined with the moisture absorption and heat generation function that has a long heat generation retention time, it is possible to design a more sophisticated product for skin cloth materials. .

According to the present invention, the type and the amount of the highly hygroscopic / water-absorbing exothermic fine particles are optimized, and the sheet-like structure adhered through a proper hydrophilic resin binder has a property of absorbing moisture and / or water. Maximum temperature rise is 3 ℃ or more, preferably 4
℃ or more, more preferably 5 ℃ or more, rapid (3 ~
The maximum temperature rise during water absorption (for 5 seconds) is 8 ° C or higher,
Moreover, the total heat generation of moisture absorption / water absorption heat generation rate, heat generation amount, heat generation retention time, such as heat generation retention time when moisture absorption is 30 minutes or more, or heat generation retention time when water absorption is 30 seconds or more, more preferably 1 minute or more In terms of performance, excellent moisture absorption /
Water absorption and exothermicity are obtained.

The amount of the highly hygroscopic / water-absorbing exothermic fine particles applied to the skin cloth is usually preferably 5 g / m ² or more. It is more preferably 10 g / m ² or more, still more preferably 20 g / m ² or more. This is because the larger the amount, the greater the heat generation effect. If it is less than 5 g / m ² , the heat generation effect is small, and if the heat generation duration is less than 5 minutes, the heat retention effect cannot be expected.

In addition to these excellent moisture-absorption / water-absorption exothermic properties, the skin-care fabric of the present invention has antibacterial and deodorant properties, antibacterial properties, deodorant properties, nonenal deodorant properties, pH buffering properties, and antistatic properties. , SR antifouling property and acid rain resistance multi-functionality can also be expressed.

[0024]

The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto. Below, what is described simply as part and% means on a mass basis. Further, the measurement and evaluation of the sheet-shaped structure in this example were carried out by the following methods.

<Absolute dry mass> After drying the sample at 110 ° C for 6 hours, the sample was placed in a desiccator containing silica gel and kept at 20 ° C for 6 hours.
After adjusting the temperature in a 5% RH environment, mass measurement was performed. <Hygroscopicity> The mass was measured after the temperature and humidity were adjusted for 24 hours in an environment of 20 ° C. and 65% RH, and calculated from the following formula. Moisture absorption rate (%) = {(moisture absorption mass-excess dry mass) / excess dry mass}
× 100

<Heat absorption by moisture absorption> After drying at 110 ° C. for 6 hours,
5c put in desiccator containing silica gel and dried
20 after mounting a temperature sensor (for example, manufactured by Anritsu Keiki Co., Ltd .; 540K MD-5 type) on a measurement sample measuring m × 5 cm.
Temperature recorder (for example, manufactured by Anritsu Keiki Co., Ltd .; DATA COLLECTOR A)
M-7052 type). <Water absorption exothermicity> After attaching a temperature sensor to the 5 cm x 5 cm measurement sample in the absolutely dry state, ion exchanged water equivalent to 50% of the sample mass is uniformly added to 3 to 5 at 20 ° C and 65% RH environment. After spraying for 2 seconds, the water absorption exothermicity was measured with a temperature recorder. The water absorption heat generation time and the water absorption heat generation retention time (minutes) above the maximum water absorption heat generation temperature and the sample temperature before water absorption were evaluated.

<Antibacterial property> A quantitative antibacterial test method (unified test method) for textiles was used according to the method specified in the manual.
As the test bacterial species, Staphylococcus aureus Staph-yl
Using Occoccus aureus ATCC 6538P, the number was determined by the following method from the number of unprocessed cloth (standard cotton cloth) bacteria [B] and the number of evaluated sample bacteria [C]. Bacteriostatic activity value = logB-logC Products having a bacteriostatic activity value of 2.2 or more were considered to have antibacterial properties.

The highly hygroscopic / water-absorbing exothermic organic fine particles used in the examples were produced by the following method. Water-soluble polymer 3 of methacrylic acid / sodium p-styrene sulfonate = 70/30
50 parts and 35 parts of sodium sulfate were dissolved in 6500 parts of water and charged into a polymerization tank equipped with a paddle-type stirrer. Next, 15 parts of 2,2'-azobis- (2,4-dimethylvaleronitrile) was dissolved in 2750 parts of methyl acrylate and 330 parts of divinylbenzene and charged into a polymerization tank at 400 rpm.
Polymerization was carried out at 60 ° C. for 2 hours with stirring to obtain a copolymer having a polymerization rate of 88%. 100 parts of the polymer is dispersed in 900 parts of water, 110 parts of caustic soda is added thereto, and 90 ° C.
After reacting for 2.5 hours, the methyl ester portion of methyl acrylate is hydrolyzed to give a carboxyl group 4.6.
A crosslinked polymer having a milliequivalent / g was obtained. The obtained polymer was dispersed in water, washed, dehydrated, and then pulverized, divided or filtered to obtain highly hygroscopic / water-absorbing exothermic particles. The obtained highly hygroscopic / water-absorbing exothermic organic fine particles had a moisture absorption rate of 50% at 20 ° C. and 65% RH, and an average particle diameter of 0.8 μm.

[Example 1] A polyester non-woven fabric having a basis weight of 70 g / m ² was used as a hydrophilic resin binder in 95 parts of an aqueous dispersion containing 20% of the above highly hygroscopic / water-absorbing exothermic particles.
F-3500 (Kao's hydrophilic silicone binder;
Polyester nonwoven fabric is dipped in a processing liquid containing 2.5 parts of solid content 40%), squeezed with a mangle so that the wet pickup ratio is 120%, dried at 100 ° C for 3 minutes, and then cured at 170 ° C for 1 minute. The processed nonwoven fabric (sheet-like structure) was obtained by ringing. The obtained fabric weight is
It was 87 g / m ² , and the amount of highly hygroscopic / water-absorbing exothermic particles deposited was 16.4 g / m ² . As a method for measuring the exothermic effect, the processed non-woven fabric (50 cm ² = 1.05 g) was heated to 110 ° C.
After the water was completely removed by drying for 2 hours, it was stored in a desiccator containing silica gel. Next, this work cloth was taken out from the desiccator and put into a desiccator (95% RH) saturated with potassium sulfate, and temperature rise data was collected by a temperature sensor and a temperature recorder. The temperature sensor used at this time is 540KMD-5 = Anritsu Keiki Co., Ltd., and the temperature recorder is DATA C.
O-LLECTOR AM-7052 = Anritsu Keiki Co., Ltd. The measurement environment is 20 ° C. × 65% RH. Table 1 shows the exothermic effect and antibacterial effect of the obtained processed nonwoven fabric. As compared with the unprocessed product, it was possible to obtain the moisture absorption heat generation / water absorption heat generation excellent in heat generation rate, heat generation temperature, and heat generation retention time.

Example 2 A processed non-woven fabric was obtained in the same manner as in Example 1 except that the solid content of the working liquid was 50% of that of Example 1 and the wet pickup rate was 75%. . The adhered amount of the highly hygroscopic / water-absorbing exothermic fine particles on the obtained processed nonwoven fabric was 5.1 g / m ² . The exothermic effect and antibacterial effect of the processed nonwoven fabric were measured in the same manner as in Example 1.

Comparative Example 1 The exothermic effect and antibacterial effect of the unprocessed nonwoven fabric used in Example 1 were measured in the same manner as in Example 1.

The heat generation effect and antibacterial effect of Examples and Comparative Examples are summarized in Table 1.

[Table 1]

[0033]

EFFECTS OF THE INVENTION According to the present invention, by adhering highly hygroscopic exothermic fine particles to a knitted fabric, woven fabric, non-woven fabric, fleece, film or sheet-shaped resin molded product through a small amount of hydrophilic resin, moisture in the external environment is absorbed. By absorbing (steam) or water (liquid) and quickly and stably generating heat, a skin cloth material suitable for medical use can be easily and stably obtained.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C099 AA01 CA19 EA08 GA01 HA10                       JA03 LA14 TA04                 4L033 AB04 AC07 AC15 CA11 CA13                       CA18

Claims (9)

[Claims] 1. A skin cloth material, which is a sheet-like structure to which highly hygroscopic fine particles are adhered, and has a maximum temperature rise of 3 ° C. or more during moisture absorption and / or water absorption. 2. The skin cloth material according to claim 1, wherein the heat generated when absorbing moisture is maintained for 30 minutes or more, and / or the heat generated when absorbing water is maintained for 1 minute or more. 3. The skin cloth material according to claim 1, wherein the maximum temperature rise upon absorption of water is 8 ° C. or higher. 4. The skin cloth material according to claim 1, wherein the highly hygroscopic fine particles are organic fine particles. 5. The highly hygroscopic organic fine particles are polystyrene-based,
Polyacrylonitrile-based, polyacrylic ester-based,
Any vinyl polymer of polymethacrylic acid ester type, having a sulfonic acid group, a carboxylic acid group, a phosphoric acid group, or at least one hydrophilic group of metal salts thereof,
The skin cloth material according to claim 4, which is a crosslinked polymer crosslinked with either divinylbenzene, triallyl isocyanate or hydrazine. 6. The skin cloth material according to claim 1, wherein the highly hygroscopic fine particles have an average particle diameter of less than 2 μm. 7. The highly hygroscopic fine particles are immobilized on the structure via a hydrophilic resin.
The skin cloth material according to any one of 1. 8. The mass ratio of the highly hygroscopic fine particles to the hydrophilic resin is from 1/1 to 20/1.
The skin cloth material according to any one of 1. 9. The sheet-like structure is a knitted fabric, a woven fabric, a nonwoven fabric, a fleece, a film or a sheet-like resin molded product, which is made of natural fibers, synthetic fibers or mixed fibers thereof. 8. The skin cloth material according to any one of 8.