JP2003306867A - Textile structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a textile structure emitting negative ions and having excellent deodorant effect and antimicrobial effect/bacteriostatic effect. <P>SOLUTION: The textile structure contains an inorganic porous substance <20 nm in the mean pore radius and ≥15 m<SP>2</SP>/g in the specific surface area, being suitably usable as clothing, beddings, curtain, wall decorative material, car interior material, sheeting, etc. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a chemical substance adsorption property,
The present invention relates to a fibrous structure that not only exhibits excellent moisture absorbing / releasing properties but also has a healing effect by generating negative ions.

[0002]

2. Description of the Related Art In recent years, awareness of health and hygiene has been increasing with the improvement of people's living standard. In each field of clothing, food and living, products and technologies with deodorant and healing functions are put to practical use. Has been converted.

Recently, adhesives used as building materials,
Volatile chemical substances contained in paints, etc., and harmful chemical substances contained in exhaust gas from cars and factories are increasing in the atmosphere that surrounds us, causing sick house syndrome and people living along highways. Physical condition is one of the major social problems. Titanium oxide, which is a photocatalyst, is used to remove such harmful chemicals to the human body.Titanium oxide decomposes fibers when used in textile products such as clothing due to its strong redox ability. I had to pay for not doing it.

Further, in creating a comfortable humidity environment, it is important to give appropriate moisture absorption and desorption properties to textiles such as clothes, but synthetic fibers such as polyester and nylon have excellent physical and chemical properties. However, since it has low hygroscopicity, it has a drawback that it tends to get stuffy when worn and is easily charged, and improvement is desired.

Therefore, as shown in Japanese Patent Publication No. 60-34979, a synthetic fiber is graft-polymerized with acrylic acid or methacrylic acid, and as shown in Japanese Patent Publication No. 58-46589, radical polymerization is possible. It has been proposed to polymerize hydrophilic monomers on polyester fibers.

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

Recently, it has been said that the number of positive ions in the air due to exhaust gas increases and the amount of negative ions decreases in daily life in the city, which adversely affects our body and environment. It is said that when the number of positive ions is greater than that of negative ions, oxidative decay, abnormalities in the body, and aging progress, and now our bodies, environment, plant systems, and water systems are weakly acidified. Therefore, the negative ion effect is to create a missing negative ion and reduce it to neutrality. Negative ions are often found naturally in water-rich forests, waterholes, coastlines, etc., and exert a healing effect that calms the hearts of people and a metabolic activation effect of the body.

Tourmaline ore has been found to date as a substance that releases such negative ions. This tourmaline, which is also called tourmaline, is a substance that has permanent spontaneous electric polarization, but it produces negative ions due to external stress. For example, Japanese Examined Patent Publication No. 6-104926 proposes an electret fiber in which finely divided tourmaline is fixed to or contained in an organic fiber.

Originally, however, tourmaline is weak in the generation of negative ions, and the effect on the human body cannot be expected so much. On the other hand, radioactive natural ore exists as a material that constantly generates negative ions, but it has a problem of generating radiation.

[0010]

In view of such background of the prior art, the present invention not only exerts excellent performance in deodorizing property and moisture absorbing / releasing property, but also has a healing effect by generating negative ions. The purpose is to provide a fibrous structure to be held together.

[0011]

The present invention has the following structure in order to solve the above problems.

That is, the present invention has an average pore radius of 20.
The present invention relates to a fiber structure containing an inorganic porous material having a specific surface area of less than 15 nm and a specific surface area of 15 m ² / g or more.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, an inorganic porous material having an average pore radius of less than 20 nm and a specific surface area of 15 m ² / g or more is used.

Both the pore radius and the specific surface area are numerical representations of the characteristics of porous pores. If the pore radius is large, the absorption activity of odorous components consisting of large molecules and the generation of negative ions are increased, but even if it absorbs water consisting of small molecules or volatile odorous components such as formalin, it is easily released. There is a problem. From this fact, the average pore radius having three functions of proper moisture absorption / desorption, deodorization, and generation of negative ions is diligently searched, and preferably 20n
It has been found that a porous substance having an average pore radius of less than m, more preferably 1 nm or more and 10 nm or less can be preferably used. In addition, the larger the specific surface area is, the larger the adsorption area of gas or liquid is, so that the specific surface area is 15 m ² /
g or more, preferably 30 m ² / g or more.

The average pore radius is Carlo Elba 22.
Pore distribution measurement (PD) by mercury injection method using 00 type device
Measure according to the method. The specific surface area is QUANTA
CHROME QUANTA SORB OS-
It is measured according to the specific surface area measuring method using the apparatus of No. 8.

The amount of generated ions in the present invention is measured by injecting air containing ions between three plates (parallel plate type) arranged in parallel in the measuring device. The distance between the outer plate and the central plate is 4 mm, and the polarization electrolysis is 1000 V / m. As a measuring principle, the outer two plates have a polarization potential (+ or −), the central plate is a linear detection plate, the central plate is charged to an arbitrary potential, and air is introduced. After that, it is represented by the number of ions per unit volume generated by the potential difference after an arbitrary time has elapsed. This principle belongs to the Abelt ion counter,
In addition to the parallel plate shape, the shape may be a coaxial cylindrical shape. Other than this, the Gerdien type applying this principle may be used as the measuring device.

Specifically, for example, the following device is used. [Ion generation amount] Measuring device: AIR ION COUNTER IC-1
000 (manufactured by Alpha LAB (USA)) Measurement conditions: room temperature 20 ± 1 ° C., humidity 50 ± 3%, indoor area 3 m × 5 m × 5 m, measurement time 10 seconds, suction amount 12 L /
Minutes, sample vibration cycle 3 times / second, sample size 30c
m × 20 cm Synthetic fibers and natural fibers can be used in the fiber structure of the present invention, but are not particularly limited, but from the viewpoint of washing durability and application, preferably a fiber containing 30% by weight or more of polyester fiber is used. It is configured. Here, as the polyester fiber, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyhexamethylene terephthalate, etc. are preferably used. Further, as the polyester constituting the polyester fiber, a copolymer of a third component can be used, and examples of the third component include isophthalic acid, 5-sodium sulfoisophthalic acid, and metoxypolyoxyethylene. The thing which copolymerized glycol etc. is used preferably. In the present invention, in addition to polyester fibers, for example, synthetic fibers such as polyamide and polyacryl, semi-synthetic fibers such as acetate and rayon, and natural fibers such as cotton, wool, silk and hemp are also preferably used. To be

The fiber structure referred to in the present invention may be composed of fibers such as a belt-like material, a string-like material, and a thread-like material as well as a cloth state. As the cloth, woven fabric, knitted fabric,
Nonwoven fabric is preferable and composite material may be used.

Examples of the components of the inorganic porous material include porous mud, clay, diatomaceous earth, bamboo charcoal, charcoal, coconut husk activated carbon, coal-based activated carbon, zeolite and perlite. Among them, diatomaceous earth, which is a natural inorganic substance, is preferably used, and is a stratum that is assumed to have been buried and deposited mainly due to crustal movements of thousands of years ago.For example, Wakkanai diatomaceous earth contained in faults widely distributed in Wakkanai It has a large specific surface area and is particularly preferably used. These diatomaceous earths often contain silicon dioxide, especially silicon dioxide.
A content of 0 wt% or more and aluminum oxide of 2 wt% or more is preferable because a porous structure is easily formed.

A material obtained by firing such an inorganic porous material is also preferably used in the present invention. A method of kneading a glass powder and a clay powder with a porous material at the time of firing and sintering the mixture into a predetermined shape is preferable for ceramicization. The firing temperature at this time is 100 degrees Celsius which is likely to become finely porous.
0 degree to 1500 degree is preferable.

The form of the above-mentioned inorganic porous material is not particularly limited, but it is dispersed in a liquid binder for stabilizing the spinnability when kneaded into the raw yarn and when fixed to the fiber structure. In terms of excellent properties, a particulate form is preferably used in each case. Further, from the viewpoint of dispersibility in the liquid binder, the average particle size is preferably 5 μm or less. Further, an inorganic dispersant or an organic dispersant is used as a dispersion stabilizer in an amount of 0.05% by weight or more with respect to the porous substance.
It is preferably used in a proportion of not more than wt%. Further, in order to make the porous material into fine particles, a dry crusher, a wet crusher or the like can be used.

In the present invention, it is preferable that the porous material is provided on the fiber structure. In order to apply the porous material onto the fibrous structure, it is preferable that the porous material is contained in a binder and applied. As the binder, an alkyl silicate resin, a silicone resin, a fluorine resin, a glyoxal resin, an acrylic resin, a polyurethane resin, an ethylene urea resin, an epoxy resin,
At least one resin selected from melamine resins and aminoplast resins may be used. More specific examples are as follows.

That is, an aqueous dispersion of a porous material and an aqueous binder solution are mixed to form a working liquid. After impregnating this processing liquid with the fiber structure, it is squeezed to a certain amount with a mangle roll or the like and undergoes a dry-cure process, or this processing liquid is adjusted to an appropriate viscosity, and a knife coater or gravure roll coater is used. After applying by printing, etc., it is fixed at a temperature of 200 degrees Celsius or less. The adhered substance may be uniformly impregnated or coated, but may be adhered to a patterned pattern such as stripes or dots. This tends to increase the frictional resistance and increase the amount of negative ions generated. At this time, the amount of the powder adhered to the fibrous structure is preferably 0.01% by weight or more and less than 50% by weight, and more preferably 0.1 to 10% by weight, from the viewpoint of texture.

Since the fiber structure of the present invention is provided with functions such as deodorant property, moisture absorption / desorption property, and generation of negative ions,
It is most suitable for applications such as clothing, bedding, curtains, wall coverings, interior materials and seat materials. Apparel for which the fiber structure of the present invention can be preferably used is not particularly limited, but includes underwear, pajamas, shirts, pants, socks, various uniforms, work clothes, ski wear, blouson, hats, gloves, school uniforms, etc. Is mentioned. In addition, bedclothes in which the fiber structure of the present invention can be preferably used include, but are not limited to, bedding, comforters, sheets, pillows, pillowcases, bed mats, blankets, towels, and the like. In addition, for the mattress, the comforter, and the pillow, the powder is applied to at least one of the side material and the filler.

[0025]

The present invention will be described in more detail based on the following examples, but the invention is not intended to be limited to these examples. In addition, "%" and "part" in the examples mean
Unless stated otherwise, it is based on weight. In addition, the quality evaluation in the examples was according to the following method. <Measurement of Mean Pore Radius> Porosity distribution measurement by mercury intrusion method (PD) Device: Carlo Elva Model 2200 SEM magnified photograph <Measurement of specific surface area> Device: QUANTA CHROME QUANTA
SORB OS-8 Measurement conditions: DET-1 point method, flow method, TDC detection pretreatment: under N2 250 ° C. × 15 minutes <hygroscopicity (ΔMR)> ΔMR (%) = MR ₂ −MR ₁ where MR ₁ means the moisture absorption rate (%) when left to stand in an atmosphere of 20 ° C. and 65% RH for 24 hours from an absolutely dry state,
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 addition, in applications such as interiors and bedding, if the hygroscopicity is high, it can be said that the humidity in the room or the bedding can be adjusted and the comfort can be obtained. Generally, it is said that ΔMR of polyester is 0%, nylon is 2%, cotton is 4%, and wool is 6%. <Evaluation of deodorization rate with detector tube> 500m containing 3g of sample
Formaldehyde gas was put into a container of 1 l so as to have an initial concentration of 80 ppm, and the container was sealed. After leaving for 30 minutes, the residual formaldehyde concentration was measured with a gas detector tube. Then, the deodorization rate (%) was calculated according to the following formula.

Deodorization rate (%) = (1- (gas detector tube concentration) / (initial concentration)) × 100 <Measurement of negative ions> Measuring device: AIR ION COUNTER IC-1
000 (manufactured by Alpha LAB (USA)) Measurement conditions: room temperature 20 ± 1 ° C., humidity 50 ± 3%, indoor area 3 m × 5 m × 5 m, measurement time 10 seconds, suction amount 12 L /
Minutes, sample vibration cycle 3 times / second, sample size 30c
mx 20 cm (1) Fold 20 × 30 cm evaluation target fabrics in a stack,
Make 5 cm x 15 cm. (2) Hold both ends of the sample obtained in (1) with both hands.
Move within a distance of 10 cm from the measurement part of the ION COUNTER. (3) Use both hands to rub the sample up and down, centering around the center. (4) The above measurement procedures (1) to (3) are repeated three times, and the average value is used as the generated ion amount (unit: pieces / CC). (5) Under the conditions of (3), the friction is 500 Pa or more in dynamic friction, and the repetitive stress is 500 Pa or more. Example 1 65% polyester having an average fineness of 3.3 dtex per single yarn
A woven fabric having a basis weight of 200 g / m ² using spun yarn composed of cotton and 35% cotton was subjected to scouring, drying, intermediate setting and dyeing under the usual processing conditions.

Wakkanai diatomaceous earth was used as the inorganic porous material. This diatomaceous earth had an average pore radius of 4 nm and a specific surface area of 101.4 m ² / g. As a result of analyzing the composition, the main one was silicon dioxide 79.5.
% And aluminum oxide 8.6%.

This mud was pulverized and dispersed in a wet disperser using sodium hexametaphosphate as a dispersant. The average particle size of this dispersion was 0.5 μm (measured with a laser diffraction type viscosity distribution meter SALD-2000J manufactured by Shimadzu Corporation). The amount of sodium hexametaphosphate (dispersant) added to this dispersion was 5%, and the amount of diatomaceous earth added was 20%.
Met. This processing agent was used as a processing liquid A. Next, after immersing in a treatment liquid of the following composition, squeezing with a mangle (squeezing rate 80%),
After drying at 130 ° C x 2 minutes, 170 ° C x 1 with a pin tenter
Drying heat treatment was performed for a minute to obtain a functionalized processed fabric A. At this time, the amount of inorganic substances attached was 0.8% with respect to the fiber cloth, and the amount of acrylic resin was 0.5%.

Treatment liquid formulation (water dispersion) Processing liquid A (concentration 20%) 50 g / l Acrylic binder (concentration 45%) 15 g / l Using functionalized processed cloth A and unprocessed cloth for comparison, The moisture releasing property, the deodorizing rate of formalin, and the negative ion were measured, and the results are shown in Table 1.

As can be seen from Table 1, good results were obtained with respect to the moisture absorption and desorption property of the unprocessed cloth, the formalin deodorizing rate, and the negative ion. Using this processed cloth A and unprocessed cloth, a shirt was made and 10 monitors were asked to wear it for 1 month in winter, and as a result, 7 people felt that they felt comfortable and warm. Met. The remaining 3 people did not feel any difference between the processed cloth A and the unprocessed cloth. None of the people decided that raw cloth was good. Further, as a result of carrying out a practical test as a sheet of bedding using the processed cloth A and the unprocessed cloth, the same result as that of the shirt was obtained. Example 2 Using the same dyed fabric as in Example 1, after immersing in the same treatment liquid as in Example 1, squeezing with a mangle (squeezing rate 80%), 1
After drying at 30 ° C. for 2 minutes, dry heat treatment was performed at 170 ° C. for 1 minute with a pin tenter to obtain a functionalized processed cloth B. The finished processed cloth has an amount of inorganic substances attached to the fiber cloth of 0.
8% and acrylic resin was 0.5%.

Using the functionalized fabric B and the untreated fabric for comparison, the moisture absorption / desorption property, the formalin deodorizing rate, and the negative ion were measured in the same manner as in Example 1. The results are shown in Table 1.

As can be seen from Table 1, good results were obtained with respect to the moisture absorption and desorption property of the unprocessed cloth, the deodorization ratio of formalin and the negative ion. Using the processed cloth B and the unprocessed cloth, curtains were prepared, respectively, and the curtains were hung at the windows of two drawing rooms of the same size, and a practical test was performed for one month. The drawing room had the lesser smell of cigarettes, and the other two had no difference. In addition, 7 were in the opinion that the reception room of the processed cloth B was calm, and the other 3 were in the opinion that there was no difference. Example 3 Using a suede-like artificial leather having a dyed basis weight of 220 g / m 2 composed of 74% polyethylene terephthalate having a fineness of 0.05 dtex and 26% wet polyurethane resin,
It was dipped in the same treatment liquid as in Example 1, then squeezed with a mangle (squeezing ratio 100%) and dried at 105 ° C. for 5 minutes to obtain a functionalized cloth C. At this time, the amount of inorganic substances attached was 1.0% with respect to the artificial leather, and the acrylic resin was 0.6%.

Using the functionalized cloth C and an unprocessed cloth for comparison, the moisture absorption / desorption property, the formalin deodorizing rate, and the negative ion were measured. The results are shown in Table 1. As can be seen from Table 1, good results were obtained with respect to moisture absorption and desorption relative to unprocessed cloth, deodorization rate of formalin, and negative ions. For two people whose running time and smoking amount were almost the same, one was using the processed cloth C and the other was using the unprocessed cloth, which was attached to the seat and door lining of the passenger car. After 3 months of practical tests, 3 months later, 10 people judged the smell of cigarettes in the car.
It was the opinion that the car had less smell of cigarettes, and the other two had no difference. In addition, it was an opinion that the driver of the work cloth C was calm and not irritated after the work cloth C was attached. The result of applying the processed cloth C as the wallpaper of the drawing room and performing the test also gave the same result as the test of the passenger car. Example 4 Wakkanai diatomaceous earth used in Example 1 was made into a 200-mesh powder, and 85% of this powder was mixed with 15% of a 200-mesh powder consisting of soda glass powder and clay and kneaded to form granules. Next, degassing firing was performed in an electric furnace at 1050 ° C. for 20 hours to produce porous ceramics. The same sodium hexametaphosphate as in Example 1 was used as a dispersant, and the mixture was pulverized and dispersed in a wet disperser. The average particle size of this dispersion is 0.5
5 μm (Laser Diffraction Viscosity Analyzer S made by Shimadzu S
It was measured by ALD-2000J). The amount of sodium hexametaphosphate (dispersant) added to this dispersion was 5%.
The amount of porous ceramics added was 20%. This dispersion was used as a working fluid B. Next, dyeing was performed using a knitted fabric (weight per unit area: 170 g / m ² ) of polyethylene terephthalate 167 dtex-144 filament false twist textured yarn. Next, after soaking the dyed cloth in the treatment liquid of the following composition, squeezing it with a mangle (squeezing rate 80%), drying at 130 ° C x 2 minutes, and dry heat treatment with a pin tenter at 180 ° C x 30 seconds to give functionalized cloth D Got At this time, the adhered amount of the inorganic substance (porous ceramics) was 0.8% with respect to the fiber cloth, and the acrylic resin was 0.5%.

Treatment liquid formulation (water dispersion) Processing liquid B (concentration 20%) 50 g / l Acrylic binder (concentration 45%) 15 g / l Functionalized processed cloth D and unprocessed cloth for comparison were used to absorb The moisture release property, the deodorization rate of formalin, and the negative ion were measured. The results are shown in Table 1. As can be seen from Table 1, good results were obtained with respect to moisture absorption and desorption relative to unprocessed cloth, deodorization rate of formalin, and negative ions. Using this processed cloth D and the unprocessed cloth, a tennis wear outerwear was produced and 10 monitors carried out a wearing test for one month, and as a result, 7
The result is that people feel comfortable and don't feel the smell of sweat. The remaining 3 people did not feel any difference between the treated cloth D and the untreated cloth. However, no one judged that the unprocessed cloth was good. Comparative Example 1 As an inorganic porous material, ancient lake bottom humus mud contained in a fault in the mountains of Shigaraki Town, Shiga Prefecture was used. The average pore radius of this mud was 38 nm and the specific surface area was 35.0 m2 / g. The results of analysis of the composition were as follows: silicon dioxide 60.5%, aluminum oxide 10.8%, iron oxide 6.8%, calcium oxide 2.9%, magnesium oxide 2.3%, sulfur 0.7. % And water content was 9.9%.

This mud was pulverized and dispersed by a wet disperser using sodium hexametaphosphate as a dispersant. The average particle size of this dispersion was 0.39 μm (measured with a laser diffraction type viscosity distribution meter SALD-2000J manufactured by Shimadzu Corporation), and the pH was 8.2. The amount of sodium hexametaphosphate (dispersant) added to this dispersion was 5%, and the amount of mud added was 20%. This processing agent was used as a processing liquid C.

Next, after the dyed fabric used in Example 1 was dipped in a treatment liquid having the following composition, the same treatment as in Example 1 was performed.

Treatment liquid formulation (water dispersion) Processing fluid C (concentration 20%) 50g / l Acrylic binder (concentration 45%) 15g / l The evaluation results are shown in Table 1.

As can be seen from Table 1, as compared with Example 1, the result was obtained that the amount of negative ions was large, but that the formalin had a low deodorizing rate and a low moisture absorption / desorption property. Comparative Example 2 The unprocessed product of the fabric used in Example 2 was evaluated,
The results are shown in Table 1. Comparative Example 3 The unprocessed product of the fabric used in Example 3 was evaluated,
The results are shown in Table 1. Comparative Example 4 The unprocessed product of the fabric used in Example 4 was evaluated,
The results are shown in Table 1.

[0040]

[Table 1]

[0041]

INDUSTRIAL APPLICABILITY The present invention relates to a fiber structure having the three functions of deodorant, moisture absorption / release and anion generation. This fiber structure is used for clothing, bedding, curtains,
By using it for wall coverings, interior materials for cars, seats, etc., the comfort of life can be improved.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) A41D 31/00 A41D 31/00 501D 501 502Z 502 A47H 23/08 A47H 23/08 A41B 17/00 Z D06M 11 / 79 D06M 11/12 // A41B 17/00 (72) Inventor Katsuya Okajima 1-1-1, Sonoyama, Otsu-shi, Shiga Toray Industries Co., Ltd. Shiga Plant F-term (reference) 2E182 AA01 CC01 CC10 3B029 HB05 3B030 AB03 3B031 AA08 AB06 AB07 AE00 4L031 AB31 AB34 BA09 BA20 DA00 DA08 DA13

Claims (11)

[Claims] 1. A fibrous structure comprising an inorganic porous material having an average pore radius of less than 20 nm and a specific surface area of 15 m ² / g or more. 2. The fiber structure according to claim 1, wherein the average pore radius of the porous material is 1 nm or more and 10 nm or less. 3. The porous material comprises 40% by weight of silicon dioxide.
As described above, the fiber structure according to claim 1 or 2, containing 2% or more of aluminum oxide. 4. The fiber structure according to claim 1, wherein the porous material is fine particles having an average particle size of 5 μm or less. 5. The porous material is fixed on the fibrous structure by a binder in a proportion of 0.01% or more and less than 50% based on the weight of the fiber.
The fiber structure according to any one of 3 above. 6. A garment using the fiber structure according to claim 1. 7. A bedding comprising the fiber structure according to any one of claims 1 to 5. 8. A curtain comprising the fiber structure according to any one of claims 1 to 5. 9. A wall covering material comprising the fiber structure according to any one of claims 1 to 5. 10. An interior material for a vehicle, which comprises the fiber structure according to any one of claims 1 to 5. 11. A sheet material comprising the fiber structure according to any one of claims 1 to 5.