JPS63219603A - Deodorizing water absorbable foundation - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a foundation having deodorizing properties and water absorption properties. A deodorizing and water-absorbing foundation using a fabric made by mixing fibers containing copper powder and water-absorbing fibers made of hollow fibers made of polyester that have special micropores and have excellent water and sweat absorption properties. It is related to.

(Conventional technology) The habit of wearing foundation has the function of maintaining a beautiful body shape, smoothly transmitting body movements to outer clothing, protecting the body from external stimuli, and keeping the skin clean by absorbing sweat and dirt. It plays a major role in creating a healthy and beautiful body through work, etc.

Recently, in order to prevent deformation, brassieres using memory alloy wires instead of general metal wires and brassiere cups using thin urethane foam, webs, nonwoven fabrics, etc. as the filling have been developed.

(Problem to be solved by the invention) However, although conventional foundations have been improved in terms of preventing them from losing their shape after washing or long-term use, no foundation has been proposed that eliminates the discomfort caused by body odor caused by sweat and dirt. Ta.

Therefore, the present invention provides a foundation that is excellent in deodorizing properties against various bad odors and has excellent water absorption and sweat absorption properties in order to eliminate the above-mentioned discomfort.

(Means for Solving the Problems) As a result of repeated studies to achieve the above object, the inventors of the present invention have developed fibers containing a specific polymer and copper powder, and hollow fibers that are oriented in the fiber axis direction over the entire cross section of the hollow fibers. The present inventors have discovered that a fabric made of fibers arranged in the same manner as above and having micropores, at least some of which communicate with the hollow portion, has excellent deodorizing properties and water absorption properties, and has thus arrived at the present invention.

That is, in the present invention, the direct copolymer of unsaturated carboxylic acid and/or its anhydride and ethylene is 8% by weight or more,
Deodorizing fiber (a) containing 1% by weight or more of copper powder that passes through a 50 mesh sieve, and hollow fibers made of polyester, which are scattered over the entire cross section of the hollow fibers and arranged in the fiber axis direction. A water-absorbing fiber (b) having micropores having a diameter of 0.001 to 5 μm, a length of 50 times or less of the diameter, and at least a part of which communicates with the hollow part. This is a deodorizing and water-absorbing foundation characterized by using a fabric containing .

In the deodorizing fiber of the present invention, examples of the unsaturated carboxylic acid and/or its anhydride that form a copolymer with ethylene include acrylic acid, methacrylic acid, maleic acid, itaconic acid, citraconic acid, hymic acid, bicyclo (2,2,2) Oct-5-ene-2,3-dicarboxylic acid, 1,2°3.4,5,8,9.10-octahydronaphthalene-2,3-dicarboxylic acid, bicyclo(2
, 2゜■) Octa-7-nin-2. 3. 5. 6-
Tetracarboxylic acid, 7-oxabicyclo(2,2,1)
Examples include hebut-5-ene-2,3-dicarboxylic acid. Among these, particularly preferred are acrylic acid and methacrylic acid.

The content of carboxyl groups in the direct copolymer of unsaturated carboxylic acid and/or its anhydride and ethylene is 0.2 a+eq/g to 6 meq/g.
−.

Preferably 0.3 meq/g to 5 meq/
g, more preferably 0.4 meq/g to 4 me
q/g.

The copper powder used in the above deodorizing fiber passes through a 50 mesh sieve. If the particle size of the copper powder becomes too large, it becomes difficult to add and mix it into the fiber.

An example of the deodorizing fiber used in the present invention is one in which copper powder (C) is mixed and dispersed in a direct copolymer phase (A) of unsaturated carboxylic acid and/or its anhydride and ethylene. Ru. Furthermore, a copolymer phase (A) and a copper powder (
It may also be a composite fiber consisting of a thermoplastic copolymer phase (B) containing C) dispersed therein.

The composite ratio of the polymer phases (A) and (B) in this composite fiber is desirably in the range of 95:5 to 20:80, particularly 95:5 to 50:50 in terms of weight ratio. In addition, in the above composite fiber, the polymer phases (A) and (B) can take any composite form, but especially in the cross section of the fiber, the polymer phases (A) and (B) and form at least two blocks, and the polymer phase (A
) is present in an exposed form at least around the fiber cross section, and the polymer phases (A) and (B) form at least two blocks side by side in the fiber cross section, or , those forming a sheath-core structure in which the polymer phase (B) is the core component and the polymer phase (A) is the sheath component, and furthermore, in the sea component consisting of the polymer phase (A). It is preferable that the island component consisting of the polymer phase (B) is arranged in a sea-crystal type.

In addition, in the above-mentioned composite fiber, the copper powder (C) may be dispersed in the polymer phase (A), and the copper powder may not be added to the polymer phase (B). In addition, the micropores of the water-absorbing fiber used in the present invention have a diameter within the range of o,oot~5 μm in terms of shape, and a length of 50 μm of the diameter.
The micropores must be present over the entire cross section of the fiber, arranged in the fiber axis direction, and at least a portion of them must be in communication with the hollow portion.

If the diameter of the micropores does not reach o, ooi μm, water absorption and sweat absorption will not be sufficient, and if it exceeds 5 μm, sufficient fiber strength will not be obtained, so a range of 0.001 to 5 μm is preferable. Particularly preferred is a range of 0.01 to 3 μm. In addition, if the length of the micropores is more than 50 times the diameter, the strength and fibril resistance of the fiber will decrease even if all other conditions are satisfied, and the length is preferably 30 times or less.

Further, since the micropores are scattered throughout the fiber cross section and arranged in the fiber axis direction, and at least a portion of them communicates with the hollow portion, sufficient water absorption and sweat absorption properties can be obtained.

If the micropores are concentrated near the fiber surface in the cross section of the hollow fiber or do not communicate to the hollow part, no matter how many micropores the hollow fiber has, water absorption and sweat absorption cannot be obtained. .

In addition, if the proportion of the total cross-sectional area of the micropores in the cross section of the fiber is too small, the water absorption and sweat absorption properties will decrease, and if it is too large, the fiber strength will decrease. 0.01~ of fiber cross-sectional area
It is preferably 50%, particularly preferably in the range of 0.1 to 30%.

If the hollowness ratio of the water-absorbing fiber is too low, the effect of improving water absorption and moisture absorption by making it hollow will decrease, and if it is too high, the hollow part will easily collapse, and once it collapses, the water absorption and sweat absorption will decrease. Therefore, the hollow ratio, that is, the ratio of the cross section of the hollow portion to the apparent cross section of the fiber, is preferably in the range of 5 to 50%.

Furthermore, the outer shape and the shape of the hollow portion in the cross section of the water absorbent fibers may be arbitrary. For example, the outer shape and the hollow part may both be circular, one of the outer shape and the hollow part may be circular and the other has an irregular shape, or both the outer shape and the hollow part may have similar or dissimilar irregular shapes. Further, there is no need to particularly limit the size of the external shape. The water absorbent fiber is
It may be formed from any thermoplastic synthetic polymer having fiber-forming ability, with polyester being particularly suitable.

The polyester mentioned here has terephthalic acid as an acid component and is selected from alkylene glycols having 2 to 6 carbon atoms, such as ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, and hexamethylene glycol, particularly preferably ethylene glycol and tetramethylene glycol. The main target is polyester whose glycol component is at least one type of glycol selected from methylene glycol. It may also be a polyester in which part of the terephthalic acid component is replaced with another difunctional carboxylic acid component, and/or a polyester in which part of the glycol component is replaced with a diol component other than the above-mentioned glycol. good.

The foundation of the present invention is composed of a fabric containing the deodorizing fiber and the water-absorbing fiber, and the fabric may be a woven fabric, a knitted fabric, a nonwoven fabric, or the like. The above-mentioned deodorizing fiber and the above-mentioned water-absorbing fiber can be mixed in any form such as blended cotton, blended yarn, blended fibers, blended hem, etc. Excellent effects can be obtained when the mixing ratio of the two is 90:10 to 20:80, especially 80:20 to 30.
: 70 is suitable.

Of course, any fiber such as cotton, wool, rayon, acetate, polyamide, polyester, vinyl polymer, etc. may be mixed in addition to the above-mentioned deodorizing fibers and the above-mentioned water-absorbing fibers, but in that case, the above-mentioned deodorizing fibers It is desirable that the fiber contains 10% or more, and the hygroscopic fiber contains 10% or more.

When the foundation of the present invention is composed of a nonwoven fabric, any conventionally known nonwoven fabric can be used, such as a dry nonwoven fabric, a wet nonwoven fabric, a web made of short fibers or long fibers, a spunbond nonwoven fabric, and a burst fiber nonwoven fabric.

In addition, when the foundation of the present invention is made of a knitted fabric, for example, using a double-sided circular knitting machine, the above-mentioned water-absorbing fibers or the above-mentioned water-absorbing fibers and general clothing fibers (nylon, polyester, cotton , wool, silk fiber, etc.) and using the above-mentioned deodorizing fiber as the thread that binds the cylinder side and the dial side. A three-layer knitted fabric is preferably used in which the water-absorbing fibers or the general clothing fibers and the water-absorbing fibers are used in the back part, and the deodorizing fibers are used in the second part.

The above-mentioned water-absorbing fiber is, for example, a hollow fiber obtained by mixing a polyester copolymerized with an organic sulfonic acid compound and a homopolyester and spinning the mixture, or a hollow fiber obtained by adding an organic sulfonic acid metal salt to the polyester and spinning the mixture. It can be obtained by treating hollow fibers with alkali to make them porous, but water-absorbing fibers that have been made porous in advance may be mixed with the deodorant fibers, or they can be mixed with the deodorant fibers before the alkali treatment. The water-absorbing fibers may be made porous by blending, blending, blending, or blending, followed by alkali treatment.

The thus obtained fabric containing fibers with a deodorizing function and fibers with a water-absorbing function can be made into foundations such as bras, girdles, body suits, and various pads (bust bands, hip pads, side bands, etc.). , processed by conventional methods.

(Function) The deodorizing mechanism of the deodorizing fiber used in the present invention is not physical adsorption deodorization such as conventional activated carbon, but a direct copolymer of unsaturated carboxylic acid and/or its anhydride and ethylene. In addition, it is based on chemical deodorization using copper powder, and since it is fibrous, the surface area is large, so the deodorizing ability is significantly improved.

In particular, direct copolymers of unsaturated carboxylic acids and/or their anhydrides with ethylene are useful for deodorizing bad odors caused by nitrogen compounds such as ammonia and trimethylamine, and aliphatic compounds such as n-butyric acid. Since it is effective in deodorizing bad odors caused by sulfur compounds such as hydrogen sulfide and methyl mercaptan, it can exert a deodorizing effect on almost all types of bad odors. Copper powder also has a bactericidal effect and has the additional effect of suppressing the generation of bad odors.

In addition, the water-absorbing fibers used in the present invention are arranged in the fiber axis direction over the entire cross section of the hollow fibers, and at least a part of the fibers communicates with the hollow portion, so water is absorbed into the micropores and the hollow portion This provides sufficient water and sweat absorption.

Furthermore, by using deodorant fibers in combination with water-absorbing fibers, the synergistic effect results in a far superior deodorizing effect compared to when deodorant fibers are used alone. It is.

(Examples) Hereinafter, the present invention will be described in detail with reference to ★ Examples, but the present invention is not limited to these in any way.

In addition, as an evaluation of the deodorizing property, the deodorizing rate was determined by the following method.

That is, 10 g of a nonwoven fabric sample or a three-layer knitted fabric sample was placed in a 4β desiccator, and the pressure was reduced using an aspirator.
Inject a fixed amount of measurement gas (liquid).

Thereafter, the inside of the desiccator is returned to atmospheric pressure, and the gas concentration at that time is set as the initial gas concentration. The initial concentration is 200-3
Adjust so that it becomes 00pρ. Furthermore, the gas concentration in the desiccator after 3 hours was measured, compared with the initial concentration, and the deodorization rate was calculated using the following formula.

Moreover, water absorption was measured by the following method.

(i) Water absorption rate test method (according to JIS-L1018) A nonwoven fabric sample or a three-layer knitted fabric sample was washed with a 0.3% aqueous solution of anionic detergent Zabu (manufactured by Kao Soap Co., Ltd.) at 40°C in a household electric washing machine. 30 minute wash? Repeat the crab a predetermined number of times, then dry the sample obtained horizontally, and place 1c above the sample.
Drop one drop of water (0.04cc) from the height of I11,
Measure the time until water is completely absorbed by the sample and reflected light is no longer observed.

(ii) Water absorption measurement method A sample obtained by drying a fabric is immersed in water for 30 minutes or more, and then dehydrated for 5 minutes in a dehydrator of a household electric washing machine. It was calculated using the following formula from the weight of the dry sample and the weight of the sample after removal.

Examples 1-2, Comparative Examples 1-2 Ethylene-acrylic acid copolymer (manufactured by Mitsubishi Yuka ■: Yucalon EAA A-
201M) chips from the other extruder (B)
Chips of polypropylene (manufactured by Ube Industries, Ltd.: S-5-115) in which copper powder passing through a mesh sieve was dispersed and mixed were melt-extruded at a discharge ratio of 1:1 and merged just before a part of the adapter. .The extrusion temperature is 21 for the A side extruder.
The temperature was 0°C to 250°C, the B side extruder was 220°C to 260°C, and the temperature after the part of the adapter to the die was 250°C. A Kenics type static mixer (8 elements) was placed in a part of the adapter to mix both component polymers.

Next, the mixed polymer was discharged from a concave-convex nozzle made of a 60-mesh plain-woven stainless steel wire mesh, and taken off at a speed of 6 m/min while blowing cooling air.

At this time, a current of about 50 A was passed through the cap to generate Joule heat to control the temperature of the cap.

The thus obtained discharged fibers were then drawn 1.3 times on a hot plate controlled at 85°C.

This composite fiber was canted to a length of 95 mm and heated to 100°C.
The material was treated with hot air for 10 minutes to develop three-dimensional crimp.

The ethylene/acrylic acid copolymer content of the obtained composite fiber (deodorant fiber) was 50% by weight, and the copper powder content was 20% by weight.

Next, dimethyl terephthalate, ethylene glycol, 3
A copolymer obtained from sodium , 5-dicarbomethoxybenzenesulfonate was made into chips.

15 parts of chips of this copolymer and an intrinsic viscosity of 0°64
After mixing with 85 parts of polyethylene terephthalate chips of No. 0 in a Nauta mixer (manufactured by Line Ironworks) for 5 minutes, the mixture was dried in a nitrogen stream at 110°C for 2 hours and then at 150°C for 7 hours. The mixture was melted and kneaded at 290° C. using a two-wheel screw extruder to form chips.

The chips were dried in a conventional manner and placed in a spinneret with a width of 0.05 mm.
A circular slit with a diameter of 0.6 n+ and a circular slit with an arc-shaped opening closed at two places was used, and a hollow fiber with an outer diameter to inner diameter ratio of 2:1 was spun according to a conventional method. Hollowness ratio 2
5%) and then treated with a 1% caustic soda aqueous solution at boiling temperature for 2 hours to obtain hollow fibers (water-absorbing fibers) with an alkali weight loss rate of 15%.

Next, the above composite fiber (deodorizing fiber) and hollow fiber (water-absorbing fiber) were mixed, and then opened into a web shape using a card machine, and heat-treated with hot air at 150°C to obtain a weight of 250 g/m2.
Deodorization rate, water absorption rate, etc. were measured as a resin cotton-like nonwoven fabric. The measurement results are shown in Table 1.

(This page, blank space below) Table 1 As is clear from the results in Table 1, the nonwoven fabric used for the foundation of the present invention has a higher , water absorption and water absorption speed are significantly improved.

(Examples 3-4, Comparative Examples 3-4) Double-sided circular knitting using the composite fibers (deodorant fibers) produced in Examples 1-2 and Comparative Examples 1-2 and hollow fibers (water-absorbing fibers) Using a machine, cylinder needles and dial needles are knitted with composite fibers, and the cylinder side and dial side are adhesively bonded with hollow fibers to create the three-layer structure knitted fabric shown in the figure, and the deodorization rate, water absorption rate, etc. was measured. The measurement results are shown in Table 2.

Table 2 As is clear from the results in Table 2, the three-layer knitted fabric used for the foundation of the present invention has excellent water absorbency, and when composite fiber (deodorizing fiber) is used alone (Comparative Example 3 ), the water absorbency and water absorption rate are significantly improved.

(Effects of the Invention) The foundation according to the present invention is composed of a fabric containing deodorizing fibers and water-absorbing fibers, so when worn, it deodorizes body odor accumulated in clothes and absorbs sweat. be able to.

In addition, the deodorizing water-absorbent foundation according to the present invention has excellent washing resistance, and even after repeated washing, the deodorizing performance and
Water absorption and sweat absorption performance do not deteriorate, and odors such as ammonia, trimethylamine, n-butyric acid, etc. and moisture can be removed by washing and drying, and it can be used repeatedly. ′

[Brief explanation of the drawing]

The figure is a structural diagram of a three-layer knitted fabric according to an embodiment of the fabric used for the foundation of the present invention. ■, 3... Water-absorbing fiber or general clothing fiber and water-absorbing fiber, 2... Deodorizing fiber.

Claims (3)

[Claims] 1. (a) Deodorizing fiber containing 8% by weight or more of a direct copolymer of unsaturated carboxylic acid and/or its anhydride and ethylene, and 1% by weight or more of copper powder that passes through a 50 mesh sieve; b) A hollow fiber made of polyester, which has micropores scattered throughout the cross section of the hollow fiber and arranged in the fiber axis direction, and the micropores have a diameter of 0.001 to 5 μm.
A deodorizing water-absorbing foundation characterized by using a fabric containing: , water-absorbing fibers whose length is 50 times or less the diameter and at least a part of which is connected to the hollow part. 2. The deodorizing and water-absorbing foundation according to claim 1, wherein the fabric is a nonwoven fabric. 3. The deodorizing and water-absorbing foundation according to claim 1, wherein the fabric is a three-layer knitted fabric.