JPH0827671A - Production of fiber structure having mite repellent effect - Google Patents

Abstract

PURPOSE:To obtain a fiber structure having mite repellent effects capable of satisfying volatilizing effects at a favorable time and further effects of good washing durability without deteriorating a feeling of the fiber structure itself. CONSTITUTION:This method for producing a fiber structure having mite repellent effects is to apply a treating liquid comprising a microcapsule consisting essentially of a urea-formalin-based resin or a melamine-formalin-based resin containing a mite repellent ingredient therein, a binder and a latent cross-linking agent in at least a part of the fiber structure and then drying and heat-treating the resultant fiber structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber structure having a durable mites-repelling effect.

[0002]

2. Description of the Related Art Conventionally, various developments have been made on fibers having a mites repellent effect, and they have been on the market as bedclothes such as buns and pillows. However, many of these are simply sprayed with a mite repellent on the final product, or coated with a mixture of a mite repellent and a paste or a thermoplastic polymer on the surface. When the agent comes into contact with water, the effect of repelling ticks disappears, and the washing resistance is poor, and the tick repellent is completely removed by one washing (for example, JP-A-61-161). Two
84210). Alternatively, at the time of packaging, a mite repellent is enclosed in a cellophane or polyethylene bag in the packaging bag, or a core paper is impregnated into mite repellent paper, and the odor is transferred to a textile product. In some cases, the product itself is defective.

Further, Japanese Patent Laid-Open No. 61-63716 discloses that
Although an aromatic core-sheath type composite fiber in which a fragrance such as a tick repellent is dispersed and mixed in the core and the core has a hollow part,
Mite repellents and the like are usually volatilized at 150 ° C. or higher, and there is a problem that the mite repellents that can withstand melt spinning are limited.

[0004]

DISCLOSURE OF THE INVENTION In view of the above-mentioned circumstances, the present inventors have made repeated studies for the purpose of imparting a durable mite repellent effect to fibers, and as a result, have incorporated a mite repellent. It was found that the use of the microcapsules is suitable for mite repellent processing.

However, according to the present invention, it is possible to obtain a long-lasting mite repellency effect by attaching microcapsules containing a mite repellant to a fiber by using a binder and a latent crosslinking catalyst, and it is possible to reduce a little by friction during use. It focuses on the fact that the microcapsules are broken or are intentionally rubbed each other to exert a diverging effect. However, JP-A-2-3602 and JP-A-4-10098
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. 0, even if microcapsules containing a mite repellent and a binder are simply attached to the fiber structure, a sufficiently durable mite repellent effect cannot be obtained. Further, when the amount of the binder was increased, there was a problem that the binder permeated into the fiber structure and became extremely hard.

The present invention has been made on the basis of the above-mentioned findings, and it is said that "a divergence effect at a preferable time and a good washing durability" can be obtained without impairing the feeling of the fiber structure itself. It is an object of the present invention to provide a fiber structure having a tick repellent effect which can satisfy the effect.

[0007]

The above-mentioned object is to provide a microcapsule and a binder containing urea-formalin resin or melamine-formalin resin as a main component in which a mite repellent component is incorporated in at least a part of the fiber structure. It is achieved by a method for producing a fiber structure having a mite repellent effect, which comprises drying and heat-treating after applying a treatment liquid consisting of and a latent crosslinking catalyst.

The present invention will be described in detail below.

The term "fiber structure" as used in the present invention means yarns, strings, woven fabrics, knitted fabrics, non-woven fabrics, napped blankets, leathers, furs, and secondary products thereof, such as coats, kimonos, suits, uniforms, sweaters and skirts. , Slacks, cardigan,
Outerwear such as sportswear, dress shirts, casual wear, underwear such as pajamas, shorts, lingerie, foundations, hosiery, socks such as stockings and socks, footwear such as slippers, futon side, sheets, duvet covers, blankets. , Beddings such as pillows, gloves, ties, scarves, shawls, small items such as glasses wipes, curtains, carpets, wall coverings, upholstered cloths, upholstery, automobile interior materials, etc.

As the structural fiber, natural fiber, regenerated fiber, synthetic fiber, or a mixed spun fiber, a compound fiber,
Any of mixed yarns such as a mixed fiber may be used.

The wall material of the microcapsule containing the mite repellent component used in the present invention must contain a urea-formalin resin or a melamine-formalin resin as a main component. Other substances, such as cyclodextrin, are not suitable because the washing durability is not improved by the latent crosslinking catalyst.

The size of the microcapsules has an average particle size of 1
It is preferably in the form of a slurry having a particle size distribution of ˜200 μm, preferably 5-20 μm, and most of the particle size distribution falling within the range of 5-20 μm. When the wall material is a urea formalin resin, the particle diameter is 2 to 200 μm, preferably 5 to 20 μm, and the wall thickness is 0.1 to 20 μm, preferably 0.5 to 4 μm. Is melamine
In the case of formalin resin, the particle size is 5 to 200 μm, preferably 5 to 20 μm, and the wall thickness is 0.2 to 30 μm, preferably 0.5 to 6 μm. In the case of a slurry, the slurry concentration is 10 to 60% by weight, preferably 20 to 40% by weight.

The mite repellent component in the present invention means 2-ethyl-1,3 hexanediol, indarone, diethyl phthalate, N, N-diethyl-m-toluamide, N-butylacetanilide, propyl N, N-diethyl. Amide repellents such as succinate, naphthalene, pyrethrins, allethrin, fresulin, cineole, citronellal,
Examples thereof include citronellol, geraniols, piperton, limonene, and citral. The mite repellent is preferably 20 to 90 based on the total weight of the microcapsules.
%, Particularly preferably 30 to 80% by weight.

The silicone resin binder which is preferably used as a binder in the present invention has a coating effect and plays a role as an adhesive between the microcapsules and the fiber structure. It is preferable to use a silicone-based aqueous emulsion type which is excellent in water and can be easily diluted with water, for example, an organopolysiloxane as a main component which is emulsified with an emulsifier. This has a rubber-like film which is cured by removing water and has the characteristics of silicone rubber, and has a durable adhesive effect.

The organopolysiloxane emulsion is more preferably a low temperature reaction type organopolysiloxane prepolymer emulsion. The low-temperature-reactive organopolysiloxane prepolymer emulsion referred to herein is, for example, 100 parts by weight of organopolysiloxane having at least two hydroxyl groups bonded to a silicon atom in one molecule and its derivative, and aminofunctional silane or its derivative. 0.1-10 parts by weight of a reaction product of a hydrolyzate and an acid anhydride and colloidal silica 1
1 to 60 parts by weight with respect to the oreganopolysiloxane and 0.01 to 50 parts by weight of the curing catalyst.
An aqueous emulsion of silicon comprising 10 to 10 parts by weight, 0.3 to 20 parts by weight of an anionic emulsifier, and 25 to 600 parts by weight of water is included.

As the binder applicable to the present invention, a low temperature reactive blocked isocyanate prepolymer emulsion may be used together with a fatty acid metal salt. This low-temperature-reactive blocked isocyanate prepolymer reacts with isocyanate groups to form a temporarily stable compound such as sodium bisulfite, acetylacetone, ethyl acetoacetate, and diethyl malonate, which is then thermally dissociated by heat treatment. A prepolymer obtained by polymerizing an acrylic or methacrylic compound and a modified acrylic or methacrylic compound such as silicon-modified or fluorine-modified, which is a compound containing at least one blocked isocyanate group that regenerates an isocyanate group in the molecule. Is mentioned.

The metal salt of fatty acid is a catalyst for promoting the dissociation of blocked isocyanate, and examples thereof include zinc octylate, zirconium octylate, zinc laurate, and zinc stearate.

Further, as the binder, an emulsion of an acrylic or methacrylic compound obtained by emulsion polymerization of a monomer containing at least one vinyl group can be used. Such emulsions include, for example, acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, acrylonitrile, acrylamide, N-methylolacrylamide, 2-hydroxyethyl acrylate, 2-hydroxyethyl acrylate, It is an emulsion of an emulsion polymer such as hydroxybutyl acrylate.

Furthermore, a polyalkylene emulsion,
An emulsion of a polyester resin composed of a polyhydric alcohol and a polybasic acid or a polyurethane emulsion composed of a diisocyanate and a polyol can also be used as the binder.

Examples of the polyalkylene include polyethylene and polypropylene, and examples of the polyhydric alcohol include ethylene glycol, 1,4-butanediol,
1,6-hexanediol, diethylene glycol, trimethylolpropane, and polybasic acids include phthalic acid, adipic acid, maleic acid, trimetic acid, terephthalic acid, and the like. Further, as the diisocyanate, hexamethylene diisocyanate, xylene diisocyanate, tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, etc., and as the polyol, polyethylene adipate, polypropylene adipate, polybutylene adipate, polyethylene. Examples thereof include phthalate, polyethylene glycol, polypropylene glycol, polyethylene propylene glycol, and the polyurethane resin emulsion formed of these forms a water-insoluble resin by a drying treatment.

Examples of the latent crosslinking catalyst in the present invention include ammonium salt type, amine salt type and metal salt type catalysts. Ammonium salts include ammonium diphosphate, ammonium rhodanide, and ammonium chloride, and amino salts include aliphatic amino alcohol hydrochlorides such as 2-methyl, 2-amino, and propanol hydrochloride. Other examples include morpholine hydrochloride, 2-aminobutanol phosphate, and triethanolamine hydrochloride. Examples of the metal salt include magnesium chloride, zinc sulfate and zinc chloride, and a mixture of aluminum chloride and magnesium chloride and zinc borofluoride.

As a method for applying a treatment liquid comprising microcapsules containing a urea-formalin resin or a melamine-formalin resin containing a tick repellent component as a main component, a binder and a latent crosslinking catalyst to a fiber structure. Examples include padding method, spray method, immersion liquid removal method, coating method and the like.

The adhered amount of the microcapsules usually accounts for 0.3 to 12.0% by weight, preferably 0.5 to 9.0% by weight of the weight of the fiber structure in the adhered portion. If the amount of microcapsules attached is less than 0.3% by weight, the mite repellent effect is insufficient, and if it is more than 12.0% by weight, the odor of the mite repellent emitted at one time is strong. There is also a problem that it becomes too much, and both are unsuitable.

The binder is provided in an amount of 0.01 to 3 times, preferably 0.02 to 2 times (weight ratio) that of the microcapsules, and the latent crosslinking catalyst is 0.01 to 100 times the microcapsules.
It is given 1 time, preferably 0.02 to 0.5 times (weight ratio), and exhibits a sufficient adhesive effect. The amount of binder is 0.
If it is less than 01 times, the coating effect is poor, while if it is given more than 3 times, the adhesion rate of the microcapsules hardly changes, and conversely, in the soft texture of the fiber structure or depending on the type of resin, it gives off an offensive odor. It causes problems and is not desirable. In addition, the amount of latent crosslinking catalyst is 0.0
If it is less than 1 time, the adhesive effect will be inferior.
Adhesion of microcapsules hardly changes even when more than twice the amount is given, and conversely causes embrittlement of the fiber structure, which is not preferable.

[0025]

EXAMPLES The present invention will be described in detail below based on examples.

The test methods which are the basis of the numerical values in the following examples are as follows.

(1) Mite repellency rate (%) Osaka Prefectural Public Health Research Method (2) Adhesion amount (% by weight based on fiber structure) Mite repellant was extracted and subjected to gas chromatography (Sim).
Adhesion was measured using an Adzu GC14B). (3) Washing test JIS L-0217 103 method

Example 1 By a generally known method, 40-count warp yarn, 40-weft single yarn, which was desizing, scouring, bleaching, and mercerizing, weft density 70 yarns / inch,
A cotton twill fabric with a weft density of 60 threads / inch was used as a sample. 5% by weight of microcapsules (40% by weight slurry) consisting of 75% by weight of tick repellent and 25% by weight of urea-formalin resin wall agent, polyurethane emulsion (Superflex E2000, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), (40% solid content) 0.5% by weight, 0.3% by weight of magnesium chloride was impregnated with a pick-up rate of 80%, squeezed, dried at 120 ° C. for 2 minutes, and then baked at 160 ° C. for 3 minutes. The product of Example 1 was obtained.

Comparative Example 1 A product of Comparative Example 1 was obtained by performing the same treatment as in Example 1 except that magnesium chloride was not used.

Table 1 shows the mite repellency and the amount of the mite repellant deposited on the products obtained in Example 1 and Comparative Example 1.

[0031]

[Table 1]

As is clear from Table 1, the products obtained in the examples are excellent in tick repellent effect and excellent in washing durability.

Example 2 In Example 1, instead of the cotton twill fabric, desizing, scouring, bleaching,
40-count mercerized warp (65% polyester, 35% cotton), 40-st weft (65% polyester, 35-cotton)
%), Warp density 70 threads / inch, weft density 60 threads / inch E /
The same process as in Example 1 was carried out except that the C plain fabric was used to obtain the product of Example 2.

Comparative Example 2 A product of Comparative Example 2 was obtained by performing the same treatment as in Example 2 except that magnesium chloride was not used.

Table 2 shows the mite repellency and the amount of the mite repellant deposited on the products obtained in Example 2 and Comparative Example 2.

[0036]

[Table 2]

As is clear from Table 2, the products obtained in the examples are excellent in mite repellency and washing durability.

[0038]

The present invention has the following effects due to the configuration described above. First, since a microcapsule containing a mite repellent component is attached to a fiber structure, for example, a woven fabric, the capsule is gradually broken during wearing or by intentional friction to emit a suitable mite repellent component. Therefore, the mite repellent component is not diffused and disappears all at once, and has a sufficient durability.

Further, by providing a binder and a latent cross-linking resin to the microcapsules, the adhesive force and the adhesiveness are remarkably improved, and the target amount of adhesion and good durability of the mite repellent are obtained.

That is, the product obtained according to the present invention satisfies the effects of the repellency of the mite repellent at a preferable time and the good washing durability, and is extremely useful.

The production method does not require complicated processing steps, and a treatment agent in which microcapsules, a binder, and a latent crosslinking catalyst are mixed at an appropriate ratio is applied, and heat treatment is performed to obtain a woven or knitted fabric. It is possible to impart a durable mites-repelling effect to a fiber structure such as clothing without impairing the original feeling.

Claims (1)

[Claims] 1. A treatment liquid comprising microcapsules containing a urea-formalin resin or a melamine-formalin resin containing a mite repellent component as a main component in at least a part of a fiber structure, a binder, and a latent crosslinking catalyst. A method for producing a fiber structure having a mite repellent effect, which comprises drying and heat-treating after applying.