JPH044139A - Deodorizing flameproof humidity permeable waterproof cloth - Google Patents

Abstract

PURPOSE:To obtain excellent deodorizing properties and fire self-fighting properties by adding a substance having deodorizing properties and a substance having flameproof properties to the microporous resin film having specific porosity formed to at least the single surface of fiber cloth. CONSTITUTION:It is necessary to form a microporous resin film containing a deodorizing substance and a flameproof substance to at least the single surface of fiber cloth so that porosity P represented by formula (I) [wherein P is porosity (%), S is the area (cm<2>) of a resin film, W is the wt. (g) of the resin film having the area S, d is the thickness (cm) of the resin film and p is the density (g/cm<3>) of a resin] is within the range of 20 - 70%. As the microporous film, a synthetic polymer based on an urethane resin is used. As the deodorizing substance, for example, a silice gel, zeolite, activated carbon or activated clay are used and, as the flameproof substance, for example, an organophosphorus compound such as dibromophosphonitrate, 2, 3-dibromopropylphosphonitrate or tris-2, 3-dibromopropylphosphate is used.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a moisture-permeable waterproof fabric having a deodorizing function that adsorbs and eliminates bad odors generated from the human body and a self-extinguishing flame retardant function.

(Prior art) A moisture-permeable waterproof fabric that has both waterproofness and moisture permeability has the function of releasing water vapor from the body's sweat out of the body while preventing rain from entering the body.

It is used in sports clothing, cold-weather clothing, etc., and is particularly used in the field of sports clothing where sweating is significant due to strenuous exercise. This moisture-permeable waterproof fabric is generally coated or laminated with a polyamino acid urethane resin, a polyurethane resin, a polytetrafluoroethylene resin, or the like.

On the other hand, nine different deodorizing methods have been proposed and implemented to remove the bad odors that are common in daily life. for example,
Physical adsorption methods, chemical adsorption methods (oxidation methods, neutralization methods, etc.), masking methods, etc. are used as general deodorizing methods, and special methods include cleaning methods, combustion methods, and biological methods. Other methods are also used.

On the other hand, nine different methods have been implemented for imparting flame retardancy.1 For example, a method of imparting flame retardancy to the fiber itself, such as meta-aramid fiber, and a method of impregnating the fiber with flame retardant resin to make it flame retardant. A method of oxidation is commonly used as a fireproofing method.

In addition, in recent years, moisture-permeable and waterproof fabrics that have deodorizing properties have become known. has not been developed until now.

(Problems to be Solved by the Invention) Moreover, sick people such as bedridden elderly people tend to produce bad odors due to urination, and furthermore, they are unable to move freely.

In the event of an emergency such as a fire, deodorizing and flame retardant sheets are required.

In addition, exercise that involves sweating, such as firefighting activities by firefighters, requires 1
There was a desire to develop a fabric that would not only eliminate bad body odor but also be effective in preventing burns.

The present invention was made in view of the current situation, and aims to obtain a moisture-permeable waterproof fabric that has excellent moisture permeability and waterproof properties, as well as excellent deodorizing and flame retardant properties. be.

(Means for Solving the Problems) The present invention achieves the above object and has the following configuration.

That is, the present invention provides a moisture permeable waterproof fabric formed by forming a microporous resin film on at least one side of a fiber fabric, the resin film containing a substance having deodorizing and flame retardant properties, and The gist of this invention is a deodorizing, flame-retardant, moisture-permeable, waterproof fabric that has a porosity in the range of 20 to 70% as calculated by the following formula (I).

ρ (where, P is the porosity (%), S is the area of the resin film (c[
Il), W is the weight (g) of the resin film of that area.

d is the thickness of the resin film (cm), and ρ is the density of the resin (g/cd). ) The present invention will be explained in detail below.

The fiber fabrics used in the present invention include polyamide synthetic fibers such as nylon 6 and nylon 66, polyester synthetic fibers such as polyethylene terephthalate, polyacrylonitrile synthetic fibers, and polyvinyl alcohol synthetic fibers.

Semi-synthetic fibers such as triacetate or nylon 6/
Examples include knitted fabrics, nonwoven fabrics, etc. made of cotton, blended fibers such as polyethylene terephthalate/cotton.

The fabric of the present invention has at least one side of the above-mentioned fiber fabric,
A microporous resin film containing a substance having deodorizing and flame retardant properties is formed.

Examples of substances having deodorizing properties used in the present invention include:

For example, silica gel, zeolite, activated carbon, activated clay,
Examples include inorganic deodorants such as molecular sieves, aluminum dihydrogen tripolyphosphate, metal phthalocyanines, and silicon phosphate compounds, and organic deodorants such as iron (It)-ascorbic acid and extracts from coniferous and hardwood trees. However, other deodorants may be used as long as they have the desired deodorizing properties.

In addition, examples of substances having flame retardant properties used in the present invention include dibromophosphonitrilate, 2,3-dibromopropylphosphonitrilate, and tris-2,3-dibromopropyl phosphate.

Halogenated organic phosphorus compounds such as tristo-3-dichloroisopropyl phosphate and tetrakishydroxymethylphosphonium chloride; organic phosphorus compounds such as phosphorylamide, tetrakishydroxymethylphosphonium hydroxide, tris-1-aziridinylphosphine oxide;

Examples include antimony trioxide/chlorinated paraffin or vinyl chloride, but these may be used alone or in combination, and other flame retardants may also be used as long as they have the desired flame retardant properties. .

These flame retardants and the above-mentioned deodorants are used in the form of a solution or a powder, and when they are in the form of a powder, fine powder with a particle size of preferably 50 μm or less, more preferably 20 μm or less is used. If the particles are too large, streaks may occur on the surface of the resin film when the resin film is formed, which may lower the quality or reduce the waterproof performance of the part, which is not preferable.

In the present invention, the microporous resin film containing a deodorizing and flame-retardant substance formed on at least one side of the fiber fabric has a porosity P expressed by the following formula (I) in a range of 20 to 70%. It is necessary that there be.

W/5-d P= (1-) X 100 (I)
ρ (However, P is the porosity (%), S is the area of the resin film (cd
), W is the weight (g) of the resin film of that area.

d is the thickness of the resin film (cm), and ρ is the density of the resin (g/ctl). ) If the porosity is less than 20%, the contact area with the odor of the deodorizing substance contained in the resin will be small, so a sufficient deodorizing effect cannot be expected; If it exceeds 70%, the physical properties of the resin will deteriorate significantly and it will no longer be suitable for practical use.

In the present invention, a synthetic polymer mainly composed of polyurethane resin is used as the microporous resin film.

Here, the synthetic polymer mainly composed of polyurethane resin refers to 3 synthetic polymers containing 50 to 100% polyurethane resin (of course, 100% polyurethane resin may also be used), and other synthetic polymers such as 9 Polymers such as acrylic acid, polyvinyl chloride, polystyrene, polybutadiene, and polyamino acids may be contained within a range of less than 50%, and the form may be a copolymer or a blend.

In particular, when a polyamino acid is contained, a synthetic polymer mainly composed of a polyurethane resin means a synthetic polymer mainly composed of a polyamino acid polyurethane resin.

The polyurethane resin used in the present invention is a polymer obtained by reacting polyisocyanate and polyol,
As the polyisocyanate, known aliphatic and aromatic polyisocyanates can be used, such as hexamethylene diisocyanate, toluene diisocyanate, xylene diisocyanate, and the reaction product of an excess of these with a polyhydric alcohol. As the polyol, polyethers, polyesters, and other known polyols used in the production of ordinary polyurethane resins can be used. Examples of polyesters include reaction products of polyhydric alcohols such as ethylene glycol, diethylene glycol or 1,4-butanediol and polybasic carboxylic acids such as adipic acid, oxalic acid or sebacic acid.

Examples of polyether include ethylene glycol,
Examples include polyhydric alcohols such as propylene glycol to which one or more alkylene oxides such as ethylene oxide, propylene oxide, and butylene oxide are added.

The content of the deodorizing agent having deodorizing ability to be included in the resin film is suitably in the range of 0.1 to 50% by weight, preferably 5 to 25% by weight, based on the weight of the resin film. If the content is less than 0.1% by weight, the desired deodorizing performance cannot be obtained,
Moreover, if it exceeds 50% by weight, the physical properties of the film will deteriorate, and the moisture permeability and waterproof performance will also deteriorate.

In addition, the content of the flame retardant having flame retardant properties contained in the resin film is 0.1 to 50% by weight based on the weight of the resin film.
, preferably in the range of 5 to 25% by weight. If the content is less than 0.1% by weight, the desired flame retardant performance cannot be obtained, and if the content exceeds 50% by weight, the physical properties of the film will deteriorate and the moisture permeability and waterproof performance will also deteriorate.

A method of incorporating a substance that has deodorizing and flame retardant properties into a resin film is to add a predetermined amount of the substance that has deodorizing and flame retardant properties when preparing the resin solution to be used, and to adjust the viscosity of the resin solution. A film forming method may be adopted in which the materials are thoroughly mixed using a matched stirrer and then coated and formed into a film.

When forming the film, the resin solution is directly coated onto the fabric. The film may also be formed on the fabric by a so-called direct coating method. A release sheet is coated with a resin solution in advance to form a film, and this is laminated with a fabric. The film may be formed on the fabric by a so-called lamination method.

The moisture permeable waterproof fabric of the present invention can be manufactured by one of a variety of methods. If you want to obtain high moisture permeability, use the wet method using direct coating.If you want to achieve high moisture permeability, use the dry method using direct coating.If you want to obtain high water resistance, use the dry method using direct coating. A film forming lamination method may be used.

In the present invention, a microporous resin film is obtained by using the above-mentioned resin, a substance having deodorizing properties and flame retardant properties, and various solvents mixed together, and by the method described below.

First, in the wet film forming method, a resin solution is diluted and mixed with a polar organic solvent (combined with a surfactant if necessary), and after the resin solution is applied to the surface of the fabric or release fabric, it is immersed in water. By solidifying the resin component, a microporous resin film is obtained.

In this case, the porosity of the microporous resin film is controlled by the dilution rate with the polar organic solvent (solid content concentration of the resin), the addition of a surfactant, the temperature of the coagulating liquid, and the like.

The polar organic solvents used here include dimethylformamide, dimethylacetamide, dimethylsulfoxide, N
-Methylpyrrolidone, hexamethylene phosphorimide, etc.

There are various methods for forming a microporous film using a dry film forming method, but one typical method is to mix an emulsion resin, a volatile solvent, and water, and then uniformly emulsify the mixture.
A resin solution is applied to the fabric surface or release paper, and the volatile solvent is first evaporated at a temperature that allows only the volatile solvent to evaporate but not water, and then water is evaporated at a temperature that allows water to evaporate. A microporous film is obtained by evaporation.

In this case, the porosity of the microporous resin film can be arbitrarily controlled by the amount of volatile solvent and water added to the resin.

The volatile solvents used here include ketone solvents and aromatic hydrocarbon solvents.

Examples of solvents for ketones include acetone, methyl ethyl ketone, methyl isobutyl ketone, etc.

Examples of aromatic hydrocarbon solvents include toluene and xylene.

In the present invention, in order to improve the peeling resistance between the resin film and the fabric, in the direct coating method, in the resin solution,
In the lamination method, an isocyanate compound is used as a binder. As the isocyanate compound, 2,4-tolylene diisocyanate, diphenylmethane diisocyanate, hexamethylene isocyanate, etc. are used.

In order to apply the resin solution to the surface of the fabric or the surface of the release fabric by direct coating, it may be carried out by a conventional coating method, such as a coating method using a knife coater, comma coater, or the like.

In particular, in a wet film lamination method in which a film is formed on the surface of a release fabric and then laminated, the film may be laminated onto the fabric using a polyurethane adhesive after the wet film formation.

In the dry film-forming lamination method, a resin solution may be coated on a release paper using a knife-over-roll coater or the like, and after dry film-forming, the resin solution may be laminated onto a fiber fabric using a polyurethane adhesive.

In the present invention, water repellent treatment is performed as post-processing.

The water repellent used here may be a known one such as a paraffin water repellent, a polysiloxane water repellent, or a fluorine water repellent.
Water repellent treatment may be carried out by a padding method, a spray method, a coating method, etc. as appropriate.

The present invention has the above configuration.

(Function) The deodorizing, flame-retardant, moisture-permeable, waterproof fabric of the present invention comprises a microporous resin film with a porosity of 20 to 70% formed on at least one side of the fiber fabric, and a substance having deodorizing properties and a deodorizing property. Since it contains flammable substances, the deodorizing substance has a wide surface area that comes into contact with bad odors such as body odor and urine, and it exhibits excellent deodorizing performance. The flame-retardant material contained in the fabric prevents the spread of flames and provides a moisture-permeable waterproof fabric with excellent self-extinguishing properties.

(Example) The present invention will be described below with reference to Examples, and the performance of the fabrics in the Examples was measured by the following method.

(1) 1g of sample and 600m of odor gas in a deodorizing tetra bag
1 and measure the change in gas concentration after 3 hours,
Find the deodorization rate (%).

(2) Flame retardant JIS L-1091D method (45° coil method) (3)
Porosity Cut the fabric having a microporous film into a square of 20 cm x 20 cm, peel the microporous film from the fiber base fabric, dry it, and calculate the thickness d (cm) and weight W (g) of the microporous film.
is measured, and this and the area 5 (400c [II) and the known resin density ρ (g/c++t) are calculated using the above (
1) Calculate the porosity P (%) by substituting into the equation.

(4) Moisture permeability (moisture permeability) JIS L-1099 (A-1 method) (5) Waterproofness (
Water Pressure Resistance) JIS L-1096 (Low Water Pressure Resistance Method) Example 1 First, as a base fabric, nylon 70 denier/24 filament was used for the warp and nylon 70 denier/34 filament was used for the weft, with a warp density of 120 pieces/inch and a weft density of 90.
A plain woven fabric (taffeta) of 1 inch is prepared, and after scouring and dyeing with acid dye in the usual manner, it is processed at a temperature of 170°C using a calendering machine with a mirror roll.
Calendering was carried out under conditions of a pressure of 30 kg/ctl and a speed of 20 m/min.

Next, KD-201 (silicon phosphoric acid compound, Rasa Kogyo ■ product) was used as a substance with deodorizing properties, and antimony trioxide powder and chlorinated paraffin (chlorination rate 60%) were used as substances with flame retardant properties. Using a Knife-O 71'-roll coater, a polyurethane resin solution with a resin solid content concentration of 30% as shown in Formulation 1 below was coated in an amount of 100%.
g/m'', transferred by immersion in a water bath with a bath temperature of 20°C to solidify the resin, and then soaked in warm water of 60°C for 1 hour.
It was washed for 0 minutes and dried.

[Formulation 1] Dimethylformamide 10 parts Antimony trioxide powder 5 parts Chlorinated paraffin (chlorination rate 60%) 5 parts After this, apply fluorine-based water repellent emulsion Asahi Guard 710 (Asahi Glass Co., Ltd. product) 5% to the above fabric. Padding with aqueous solution (squeezing ratio 30%)
After the treatment, a heat treatment was performed at 160° C. for 1 minute to obtain a deodorizing, flame-retardant, moisture-permeable, waterproof fabric of the present invention.

For comparison with the present invention, the method was exactly the same as in this example except that the addition of KD-201, a substance with deodorizing properties, and antimony dioxide and chlorinated paraffin, which were substances with flame retardant properties, was omitted. A comparative moisture-permeable waterproof fabric (referred to as Comparative Example 1) was obtained.

For comparison with the present invention, a comparative moisture-permeable waterproof fabric (
This is comparative example 2. ) was obtained.

The performance of the moisture-permeable waterproof fabrics of the present invention and Comparative Example 1.2 obtained as described above was measured, and the results are shown in Table 1.

As is clear from Table 1, the deodorizing, flame-retardant, moisture-permeable, waterproof fabric of the present invention had both excellent deodorizing ability against smelly gases and flame-retardant ability against contact with flames.

Furthermore, there were no practical problems with regard to moisture permeability and water pressure resistance of the fabric.

Example 2 First, polyethylene terephthalate 50 denier/24 filament was used as the base fabric for both the front yarn and the back yarn, and the number of courses was 52/inch.

Prepare 40 wales/inches of tricots,
This was scoured and dyed with disperse dyes in the usual manner.

Next, Guimshu Cu was used as a deodorizing substance, and Frame Guard 6188 was used as a flame retardant substance.
- Using NS, resin solid content/concentration 16 as shown in formulation 2 below.
% polyurethane resin solution.

Using a knife over roll coater, adjust the coating amount appropriately so that the dry film thickness of the resin film is 30 μm, coat on the release paper, dry at 60 ° C for 3 minutes, and apply the first coating. Dry again at 120°C for 2 minutes to form a microporous resin film, and apply a polyurethane adhesive solution shown in Formulation 3 below on the thus formed resin film using a knife-over-roll coater. Coating amount: 60g/m
After coating at 90° C., it was dried for 3 minutes at 50° C., and a base fabric was laminated thereon, followed by thermocompression bonding at 90° C. and 3 kg/cnf.

[Formulation 2] Water/methyl ethyl ketone (=5015) 5 5 l
[Formulation 3] Burnock DN-950 10 parts Diisocyanate (Dainippon Ink & Chemicals (6) product) Dimethylformamide Toluene 10 parts 40 parts Subsequently, the release paper was peeled off, and the resulting laminated fabric was coated with Asahi fluorine-based water repellent emulsion. Guard 710 (Asahi Glass Co., Ltd. product) Padding treatment using a 5% aqueous solution (
The fabric was subjected to a heat treatment at 160° C. for 1 minute to obtain a deodorizing, flame-retardant, moisture-permeable, waterproof fabric of the present invention.

For comparison with the present invention, Dime Shoe Cu and Frame Guard 6188 were prepared from [Formulation 2] used in this Example.
A comparative moisture-permeable waterproof fabric (Comparative Example 3) was obtained in exactly the same manner as in this example except for -NS.

The performance of the moisture-permeable and waterproof fabrics of the present invention and Comparative Example 3 obtained as described above was measured, and the results are shown in Table 2.

It has odor performance and flame retardant performance in Table 2, and is also excellent in moisture permeability and waterproofness.

The deodorizing, flame-retardant, moisture-permeable, waterproof fabric of the present invention is a material particularly suitable for use in sheets for patients and clothing for firefighters.

Claims (1)

[Claims] (1) A moisture-permeable waterproof fabric formed by forming a microporous resin film on at least one side of a fiber fabric, the resin film containing a substance having deodorizing and flame retardant properties, and in which the vacancies in the film are A deodorizing, flame-retardant, moisture-permeable, waterproof fabric having a porosity in the range of 20 to 70% as calculated by the following formula (I). P={1-(W/S・d)/(ρ)}×100...(
I ) (where P is the porosity (%), S is the area of the resin film (
cm^2), W is the weight (g) of the resin film of that area, d
is the thickness of the resin film (cm), and ρ is the density of the resin (g/cm
^2). )