JPH06200473A - Synthetic fiber structure excellent in hygroscopicity - Google Patents

Abstract

PURPOSE:To obtain the subject fiber structure excellent in hygroscopicity by coating one surface of synthetic fiber to which a moisture absorbent or an antistatic agent or both are applied with a resin solution containing specific porous particles. CONSTITUTION:A woven, a knitted or a nonwoven fabric, composed of preferably hollow fiber having through-holes as a cross-sectional shape of fiber by using synthetic fiber such as polyester-based fiber is dipped in a treating bath containing a moisture absorbent and/or an antistatic agent, then dried and heat-treated and at least one surface of the resultant fabric is subsequently coated with a treating solution prepared by adding porous fine particles consisting essentially of silicon dioxide to a polyester resin, an acrylic copolymer resin or a silicone-based resin, dried and heat-treated to afford the objective synthetic fiber structure excellent in hygroscopicity. Bisphenolic or unsaturated polyester-based moisture absorbents are cited as the moisture absorbent and polyethylene glycol mono(meth)acrylate, polyethylene glycol di(meth)acrylate, etc., containing an ethylene oxide chain having >=6 recurring units are exemplified as the moisture absorbent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic fiber structure having excellent hygroscopicity.

[0002]

2. Description of the Related Art Conventionally, many methods have been proposed for imparting hygroscopicity and water absorption to synthetic fibers such as polyester and polyamide. For example, Japanese Patent Publication No. 51-2559 discloses a non-containing main chain mainly composed of a polyalkylene oxide segment at both ends or one end or at least two or more acryl and / or methacryl groups as side chains of the main chain. A method of polymerizing a monomer of a quaternary nitrogen compound on the fiber surface to make it hydrophilic is disclosed in JP-A-61-70.
No. 081 gives an aqueous solution obtained by reacting a natural saccharide derivative obtained by adding an alkylene oxide to a natural polysaccharide with an organic polyisocyanate and blocking an isocyanate group of a urethane compound having an isocyanate group, which has a hygroscopic property. The method of imparting water absorption is also Japanese Patent Publication Sho 5
In Japanese Patent Laid-Open No. 2-53632, a textile liquid is coated with a resin solution containing porous particles containing silicon dioxide as a main component to form a moisture-permeable resin film, and pores of the porous particles are left in the resin film. Therefore, a method of imparting hygroscopicity has been proposed.

[0003]

However, in the present situation, although any of the methods can provide water absorption, it has not yet reached sufficient hygroscopicity. That is, it is very difficult to impart hygroscopicity to a synthetic fiber structure, and there has been no satisfactory product in the past.

The present invention has been made in view of the above problems, and an object thereof is to provide a synthetic fiber structure having excellent hygroscopicity.

[0005]

The above object is to provide a resin liquid containing porous particles containing silicon dioxide as a main component on at least one surface of a synthetic fiber structure to which a hygroscopic agent and / or an antistatic agent is applied. This is achieved by a synthetic fiber structure having excellent hygroscopicity, which is characterized by being applied.

The present invention will be described in detail below.

In the present invention, the synthetic fiber structure includes
Examples thereof include woven fabrics, knitted fabrics, non-woven fabrics, etc. made of polyester fibers, polyamide fibers, acrylic fibers, polyurethane fibers and the like.

In the present invention, the shape of the cross section of the fiber is not particularly limited, but it is preferable to use a hollow fiber passing through the through groove from the viewpoint of hygroscopicity.

A typical example of the above-mentioned method for producing a hollow fiber having a through groove is to prepare a core / sheath type composite yarn as shown in FIG. 1 and then dissolve or decompose and remove the core component (2). It is a method of obtaining a hollow fiber composed of the sheath component (1) such as 2. The hollowness of the obtained hollow fiber and the width of the through groove can be arbitrarily adjusted during the core-sheath composite spinning.

The spinning material used for the core portion in the composite spinning is not particularly limited as long as it is capable of composite spinning and convenient for the subsequent core polymer removing step. A core polymer that is convenient for the removal process is a water-soluble polymer,
Examples thereof include polymers that can be decomposed and dissolved in an alkaline aqueous solution, polymers that can be dissolved in an acid, and polymers that can be dissolved in a non-aqueous solvent, and those that can be dissolved or decomposed in water or an alkaline aqueous solution are particularly advantageous.

There are a number of water-soluble polymers, such as polyethylene oxide, polyethylene oxide / polypropylene oxide copolymers, their derivatives, and segment copolymers of other polymer (eg polyester or polyamide) segments. Alkylene oxide polymer, polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl polymers such as polyacrylate,
Examples thereof include water-soluble polyamides such as polybispropoxyethane adipamide and polybispropoxypiperazine adipamide.

Examples of the polymer which can be decomposed and dissolved in an alkaline aqueous solution include fiber-forming polyesters such as polyethylene terephthalate, polybutylene terephthalate and polyethyleneoxybenzoate, and their copolymers and modified products.

In particular, the above polyester is contained in an amount of about 1 to 60% (by weight), preferably 2 to 30%, most preferably 5 to
Those obtained by copolymerizing or mixing 20% polyalkylene oxides, or those obtained by copolymerizing 5-sulfoisophthalic acid sodium salt in an amount of 3 to 10% are easily decomposed by an alkaline aqueous solution. Similarly, an aliphatic polyester having a low melting point (200 ° C. or lower) is added to the aromatic polyester.
A mixture of about 50% is also very suitable as the core component.

The hollowness of the fiber used in the present invention can be arbitrarily selected according to the purpose of use. For example, the hollowness can be 10 to 60% for obtaining normal hygroscopicity, and 40 to 80% for obtaining particularly high hygroscopicity.

The hygroscopic agent or antistatic agent used in the present invention is not distinguished by its effect. Many antistatic finishing agents have a hygroscopic effect, and many hygroscopic finishing agents have an antistatic effect. Therefore, the moisture absorption processing agent or the antistatic processing agent may be used alone or in combination.

As the moisture absorbing agent, the following general formula is used.

[Chemical 1] Bisphenol type shown by

[Chemical 2] Other aliphatic groups or aromatic groups such as polyethylene glycol monoacrylate, polyethylene glycol monomethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, etc. having an ethylene oxide chain of 6 or more repeating units Examples thereof include esters of polyethylene glycol derivatives having acrylic acid and acrylic acid or methacrylic acid, and methacrylates of ethylene glycol propylene glycol copolymers.

As the antistatic agent, the following general formula is used.

[Chemical 3] Examples of the polyester-based random copolymer represented by and polyethylene terephthalate polyoxyethylene monophenyl ether polycondensate, and the like.

The method of applying the moisture absorbing agent and / or the antistatic agent in the present invention varies depending on the type of the agent, but for example, in the case of dipping, it is 1 to 10% owf.
Immersion treatment is performed at 40 to 130 ° C. for 10 to 60 minutes in the bath. In this process, dyeing and bath treatment may be possible.
Also, in the case of immersion squeezing, spraying, etc., 1-10% o
A ws treatment liquid is applied, a picking-up solution is squeezed at a pick-up rate of 30 to 80%, and after drying, curing is performed at 150 to 200 ° C. In any case, suitable conditions are selected depending on the type of processing agent and purpose.

The porous particles used in the present invention are mainly composed of silicon dioxide and usually have an average particle size of 2 to 50.
μ, and the total pore volume of pores in the particles is preferably 0.2 to 5 ml / g. Further, those having a hydroxyl group on the particle surface are preferable. Suitable porous particles containing silicon dioxide as a main component include those having a highly porous network structure in which primary particles of silica gel on the order of millimicrons are three-dimensionally connected by siloxane bonds.
Titanium oxide, zirconium oxide, aluminum oxide, etc. are used as other components.

Examples of the resin used in the present invention include urethane resins, acrylic copolymers, and polymeric substances containing silicon as a main component.

As the polyurethane resin, for example, an organic diisocyanate and a polyalkylene ether glycol, or a polyester having a hydroxy group at the end is reacted to prepare a prepolymer, and a chain extender such as diamine, diol or polyol is used to carry out an appropriate known method. To produce a polyurethane elastomer. As the organic diisocyanate which is a component constituting these polyurethanes, aromatic, aliphatic, and alicyclic hydrocarbon diisocyanates or a mixture thereof, specifically, for example, toluylene-2,4-diisocyanate, toluylene-2,
6-diisocyanate, diphenylmethane-4,4 '
-Diisocyanate, 1,5-naphthylene diisocyanate, hexamethylene diisocyanate, paraxylene diisocyanate and the like.

Examples of the polyalkylene ether glycol include polyethylene ether glycol, polypropylene ether glycol, polytetramethylene ether glycol, polyhexamethylene ether glycol, and mixtures and copolymers thereof, and polyesters include ethylene glycol, 1, Aliphatic polyalkylene glycols such as 4-butylene glycol, propylene glycol, tetramethylene glycol, and hexamethylene glycol, alicyclic glycols such as cyclohexanediol, or glycols such as aromatic glycols such as xylenediol and succinic acid, adipic acid, Polycondensates with organic acids such as sebacic acid and terephthalic acid are used as chain extenders such as ethylene glycol, 1,4-butylene glycol and hydra. Emissions, ethylenediamine, include methylene di -O- chloro aniline. If necessary, triethylamine, triethylenediamine, N-methylmorpholine, N-ethylmorpholine, dibutyltin dilaurate, cobalt naphthenate or the like is used as a polymerization reaction catalyst. The polyurethane thus obtained is usually applied to the present invention in the form of a solution. As the solvent for dissolving polyurethane, water or a water-soluble or water-miscible solvent that can be extracted with a water-miscible solvent is suitable, and examples thereof include N, N-dimethylformamide, dimethylsulfoxide, tetrahydrofuran, tetramethylurea, and N. , N-dimethylacetamide, dioxane, butylcarbinol and the like are used alone or in combination. It is permissible to use ketones such as acetone and methyl ethyl ketone and water in these solvents in an amount that does not solidify the polyurethane, for example, 20% or less.

As the acrylic copolymer used in the present invention, any of those generally used can be applied. For example, a hydroxyl group- or carboxyl group-containing ethylenically unsaturated monomer polymer and a crosslinking agent are ketones. A solution dissolved in an organic solvent such as benzene, xylene, toluene and halogenated hydrocarbons is mainly used.

The hydroxyl group- or carboxyl group-containing ethylenically unsaturated monomer polymer is represented by the general formula:

[Chemical 4] (In the formula, R ₇ is hydrogen or an alkyl group having 1 to 2 carbon atoms, R ₃
Is an alkyl group, an aryl group, a halogen-substituted alkyl group,
Halogen-substituted aryl group, nitrile group or 2 to 1 carbon atoms
9 represents an alkoxycarbonyl group. However, when R ₃ is a nitrile group, R ₇ is hydrogen. ) An ethylenically unsaturated monomer having neither a hydroxyl group nor a carboxyl group, represented by the general formula

[Chemical 5] (Wherein R ₂ represents hydrogen, an alkyl group or a carboxyalkyl group, R ₁₀ represents a hydrogen or a carboxyl group, R ₁₁ represents a hydrogen or a hydroxyalkyl group, and n represents 0 or a positive integer) or It can be obtained very easily by polymerizing an ethylenically unsaturated monomer having a carboxyl group by a known appropriate method. If a specific example of the monomer represented by the general formula (2) is shown here, acrylonitrile, alkyl acrylate, alkyl methacrylate, styrene, etc. are acrylic as the monomer represented by the general formula (3). Examples of the acid include ethylenically unsaturated acids such as methacrylic acid, itaconic acid, fumaric acid and maleic acid, hydroxyalkyl acrylates, hydroxyalkyl methacrylates and 3-chloro-2-hydroxyalkyl methacrylates, and these (2) or (3 It is needless to say that the monomers represented by the formula) may be used as two or more kinds of each of them in the polymerization to form a ternary or more multi-component polymer.

As the polymer substance containing silicon as a main component, a dehydrogenation reaction, dealcoholization reaction or addition reaction product of a silicon prepolymer having hydrogen, an alkyl group or a hydroxyl group at the terminal is generally used. It is a polymeric substance produced by the following formula and is industrially produced. (A) Dehydrogenation reaction type

[Chemical 6] (B) Dealcoholization reaction type

[Chemical 7] (C) Addition reaction type

[Chemical 8]

The silicon prepolymer is a halogenated hydrocarbon such as trichloroethylene, tetrachloroethylene, 1,1,1-trichloroethane or the like, or a simple substance of benzene or toluene or a mixed solvent thereof and a solid content concentration of 5 to 40.
%, Viscosity adjusted to 3000 to 50000 cps, Pt,
By using a catalyst containing a metal such as Zn, Sn, or Pb together, a resin film containing silicon as a main component is formed on the fiber structure.

The resin solution containing porous particles containing silicon dioxide as a main component may be applied by either dry coating or wet coating, including a floating knife coater, a knife over roll coater, a reverse roll coater, a roll doctor coater, A coating method such as a gravure roll coater or a kiss roll coater can be used. Further, the coating film may be made porous by a known method.

In the present invention, in addition to the coating process,
Of course, various treatments such as water repellency and softness may be applied. However, the water-repellent treatment can be performed either before or after coating, but if it is performed before coating, it is necessary to pay sufficient attention to the adhesive strength.

[0029]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Each data in the examples was obtained as follows. A. Moisture absorption rate The weight of the sample was measured after absolutely drying at 110 ° C for 2 hours, and then the sample was allowed to stand for 48 hours in an atmosphere of an aqueous sulfuric acid solution (20 ° C x 65% RH). The moisture absorption rate was measured.

[Equation 1] B. Moisture absorbing agent application rate

[Equation 2] C. The water vapor transmission rate was measured according to JIS-L-1099. D. The water pressure resistance was measured according to JIS-L-1092 (method A).

Example 1 A plain woven fabric using 60d / 48f polyester filament yarns as warp and weft (warp density 98 yarns / inch, weft density 9
4 pieces / inch), and scouring this fabric by a known method,
Heat set and dyed. 10 g of this plain woven fabric was used as a bisphenol-based moisture absorbing agent (KBN-2 manufactured by Kyoeisha Yushi Co.
0, hygroscopic agent represented by general formula (1)) 6.25 g
/ L, auxiliary (Ultra MT170 manufactured by Mijimajima Chemical Co., Ltd.) 0.
It was immersed in 400 ml of an aqueous solution of 2 g / l, heated at a rate of 2 ° C. for 1 minute, and treated at 130 ° C. for 60 minutes.

Then, silicon dioxide porous particles (average particle diameter 3.5 μm, surface area 700 m ² / g, pore volume 0.
A mixture of 40 parts of 44 ml / g and an average pore diameter of 25Å) and 60 parts of isopropyl alcohol to prepare each porous silica solution was added to an acrylic resin (Teisan Resin SG-51 manufactured by Teikoku Chemical Co., Ltd.).

A mixture of 100 parts of the above resin and 13 parts of a porous silica liquid was applied using a floating knife coater, immediately dried at a temperature of 120 ° C., and then heat-treated (170 ° C.) to obtain an example. 1 product was obtained.

Comparative Example 1 The fabric used in Example 1 was provided with a moisture absorbing agent in the same manner as in Example 1. Then, an acrylic resin (Teisan Resin SG-51 manufactured by Teikoku Chemical Co., Ltd.) alone was coated in the same manner as in Example 1 to obtain a product of Comparative Example 1.

Comparative Example 2 The woven fabric used in Example 1 was treated without adding a moisture absorbing agent,
Coating was performed in the same manner as in Example 1 and Comparative Example 2
Got the product.

Comparative Example 3 The woven fabric used in Example 1 was treated without adding a hygroscopic agent.
Acrylic resin (Teisan Resin SG-5 manufactured by Teikoku Chemical Co., Ltd.
1) A single product was coated in the same manner as in Example 1 to obtain a product of Comparative Example 3.

Example 2 Copolymerized polyethylene terephthalate containing 17% of polyether segments (hereinafter referred to as copolymerized PE) obtained by copolymerizing polyethylene glycol having an average molecular weight of 3000 with 80 d / 48 f polyester filament yarn as a warp.
T) as a core, polyethylene terephthalate (hereinafter referred to as PET) as a sheath, and a jointing ratio of PET: copolymerized PET = 2: 1 of 75d / 24f composite yarn is used as a weft yarn. Book / inch, weft density 95 book / in
ch) and prepare this fabric with sodium hydroxide 1%, 98
It was treated with an alkaline aqueous solution at 40 ° C. for 40 minutes to remove the copolymerized PET on the core of the composite yarn. The cross-sectional view of the treated yarn was as shown in FIG. Then, this woven fabric was scoured, heat-set and dyed by a known method.

Then, a moisture absorbing agent was applied to this woven fabric in the same manner as in Example 1, and thereafter coating was performed in the same manner as in Example 1 to obtain a product of Example 2.

Comparative Example 4 The woven fabric used in Example 2 was provided with a moisture absorbing agent in the same manner as in Example 1. Then, an acrylic resin (Teisan Resin SG-51 manufactured by Teikoku Chemical Co., Ltd.) alone was coated in the same manner as in Example 1 to obtain a product of Comparative Example 4.

Comparative Example 5 The woven fabric used in Example 2 was treated without adding a moisture absorbent finishing agent.
Coating was performed in the same manner as in Example 1, and Comparative Example 5
Got the product.

Comparative Example 6 The woven fabric used in Example 2 was treated without adding a hygroscopic agent.
Acrylic resin (Teisan Resin SG-5 manufactured by Teikoku Chemical Co., Ltd.
1) A single product was coated in the same manner as in Example 1 to obtain a product of Comparative Example 6.

Table 1 shows the results of measuring the physical properties of the products obtained in Examples 1-2 and Comparative Examples 1-6.

[0043]

[Table 1]

As is clear from Table 1, the products obtained in the examples are excellent in hygroscopicity.

Example 3 70d / 12f 6 nylon filament yarn was used as the warp,
Plain fabric using 70d / 18f 6 nylon filament yarn as weft (warp density 122 yarns / inch, weft density 85 yarns / in
ch) was prepared, and this woven fabric was scoured, heat set and dyed by a known method.

Next, a moisture absorbing agent was applied to this woven fabric in the same manner as in Example 1, and thereafter coating was performed in the same manner as in Example 1 to obtain a product of Example 3.

Comparative Example 7 The woven fabric used in Example 3 was provided with a moisture absorbing agent in the same manner as in Example 1. Then, an acrylic resin (Teisan Resin SG-51 manufactured by Teikoku Chemical Co., Ltd.) alone was coated in the same manner as in Example 1 to obtain a product of Comparative Example 7.

Comparative Example 8 The woven fabric used in Example 3 was treated without adding a moisture absorbing agent,
Coating was performed in the same manner as in Example 1 and Comparative Example 8
Got the product.

Comparative Example 9 The woven fabric used in Example 3 was treated without adding a moisture absorbing agent,
Acrylic resin (Teisan Resin SG-5 manufactured by Teikoku Chemical Co., Ltd.
1) A single product was coated in the same manner as in Example 1 to obtain a product of Comparative Example 9.

Example 4 Copolymerized polyethylene terephthalate (hereinafter referred to as copolymerized PET) containing 17% of polyether segment obtained by copolymerizing polyethylene glycol having an average molecular weight of 3000 was used as a core, and 6 nylon filament yarn was used as a sheath. ,
Bonding ratio 6 Nylon: Copolymer PET = 2: 1 10
A plain woven fabric (warp density 117 yarns / inch, weft density 83 yarns / inch) using a 0d / 40f composite yarn for the warp yarns and the weft yarns was prepared, and the woven fabrics were treated with sodium hydroxide 1% and an alkaline aqueous solution at 98 ° C. Coated PE for core of composite yarn
T was removed. The cross-sectional view of the treated yarn was as shown in FIG. Then, the fabric is scoured by a known method,
Heat set and dyed.

Then, a moisture absorbing agent was applied to this woven fabric in the same manner as in Example 1, and thereafter coating was performed in the same manner as in Example 1 to obtain a product of Example 4.

Comparative Example 10 The woven fabric used in Example 4 was provided with a moisture absorbing agent in the same manner as in Example 1. Then, an acrylic resin (Teisan Resin SG-51 manufactured by Teikoku Chemical Co., Ltd.) alone was coated in the same manner as in Example 1 to obtain a product of Comparative Example 10.

Comparative Example 11 The woven fabric used in Example 4 was treated without adding a moisture absorbing agent,
Coating was carried out in the same manner as in Example 1, and Comparative Example 1
1 product was obtained.

Comparative Example 12 The woven fabric used in Example 4 was treated without adding a moisture absorbing agent,
Acrylic resin (Teisan Resin SG-5 manufactured by Teikoku Chemical Co., Ltd.
1) A single product was coated in the same manner as in Example 1 to obtain a product of Comparative Example 12.

Table 2 shows the results of measuring the physical properties of the products obtained in Examples 3 to 4 and Comparative Examples 7 to 12.

[0056]

[Table 2]

As is clear from Table 1, the products obtained in the examples have excellent hygroscopicity.

[0058]

EFFECTS OF THE INVENTION The synthetic fiber structure of the present invention having excellent hygroscopicity has remarkably excellent hygroscopicity as compared with the conventional product, and when the fiber structure is used for clothes or the like, it has high humidity. By absorbing moisture, the moisture in the clothes can be kept low, and since moisture is not so much absorbed at low humidity, the moisture in the clothes can be kept high, which is very useful.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a core-sheath type composite yarn.

FIG. 2 is a cross-sectional view showing a hollow fiber having a C-shaped cross-sectional shape.

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location C09D 7/12 PSK 7211-4J D06M 15/00

Claims (1)

[Claims] 1. A resin liquid containing porous particles containing silicon dioxide as a main component is applied to at least one surface of a synthetic fiber structure to which a hygroscopic agent and / or antistatic agent is applied. A synthetic fiber structure with excellent hygroscopicity.