JPH09250084A - Fabric with excellent bathochromic properties and antibacterial properties - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a fabric excellent in bathochromic property and antibacterial property. SOLUTION: A fabric composed of false-twisted yarn having a sheath-core structure obtained by aligning two or more kinds of polyester multifilaments having different elongations and false-twisting is dyed, and a low-refractive-index resin is two-staged. And a fabric, which is further treated with a quaternary ammonium salt after being applied to the fabric.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polyester multifilament fabric. More particularly, it relates to a deep black, antimicrobial polyester multifilament fabric.

[0002]

2. Description of the Related Art Recently, the need for antibacterial and deodorant processing has been increasing with the intention of cleanliness. Due to the nature of formal wear, it is often worn even in midsummer, and in that case, it is desired that no unpleasant odor is produced due to the rotting odor of sweat. However, unlike normal black clothes, polyester formal wear is required to have a deep black color, and a black value of 10 or less in terms of L value. Therefore, after dyeing, a resin with a low refractive index is generally used. The deep color processing of is done.

Although a method for imparting an antibacterial function to such a cloth subjected to the bathochromic processing has been studied in the past, imparting an antibacterial agent to the surface of a resin having a low refractive index impairs the bathochromic effect, resulting in a depth. There was a problem that black was not obtained. recent years,
In particular, a fabric for formal black that has antibacterial properties and has a depth is desired.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cloth having a bathochromic black color and excellent antibacterial properties.

[0005]

Means for Solving the Problems That is, the present invention provides a dyed fabric composed of a sheath-core structure false twisted yarn,
The sheath-core structure false twisted yarn is obtained by false twisting by aligning two or more kinds of polyester multifilaments having different elongations, and further, a resin having a low refractive index is added and a quaternary ammonium salt is added. The fabric is characterized by being provided with 0.01 to 1% owf.

Further, two or more kinds of polyester multifilaments having different elongations are aligned and false twisted, and a fabric composed of a false twisted sheath-core structure false twisted yarn is dyed, and then a low refractive index resin is applied in two stages. And a treatment with a quaternary ammonium salt. The sheath-core structure false twisted yarn used in the present invention is a yarn obtained by aligning two or more kinds of polyester multifilament yarns and performing false twisting, for example, JP-A-1-124651 or JP-A-2-124651. As illustrated in Japanese Patent Laid-Open No. 139440 and Japanese Patent Laid-Open No. 6-108344, highly oriented yarns and partially oriented yarns having different elongations are aligned and supplied to an interlace nozzle to mix fibers. After being entangled, it is obtained by performing false twisting or drawing false twisting to give crimps.

Particularly, a sheath-core structure false twisted yarn as exemplified in JP-A-7-109628 is preferable, and specifically, a yarn length difference between the sheath yarn and the core yarn is 10% or more. ,
Also, the heat-shrinkage rate (WS) at 130 ° C is 3 for the sheath yarn.
% Or less, 10% or more in the core yarn, and the dry heat shrinkage (DS) at 160 ° C. is 1.5% or less in the sheath yarn and 12% in the core yarn.
That is all. Furthermore, preferably, the WS of the sheath yarn is 2,0.
% Or less, DS is 1.0% or less, and WS of the core yarn is 10.
DS is 12.0% or more at 0% or more.

Such a sheath-core structure false twisted yarn is a yarn having a spontaneous elongation property, for example, a partially oriented undrawn yarn (POY) of polyester multifilament having Δn of 0.02 to 0.08, at 150 ° C. It is obtained by aligning a yarn obtained by a relaxation treatment at the following temperature with another multifilament and performing false twisting. The cloth composed of the false-twisted textured yarn in the present invention means a cloth in which the false-twisted textured yarn of the above-mentioned sheath-core structure is used for the warp and / or the weft. For example, cloths exemplified in JP-A-6-108344 and JP-A-2-139440 are preferable.

The cloth composed of the false-twisted textured yarn of the present invention has better bathochromic properties than the case of dyeing a normal polyester woven fabric. The reason for this is considered to be that the dyeability is good due to the presence of the unstretched portion, and the bulky structure facilitates the exhaustion of the dye due to the increase in the surface area. Further, compared to the flat yarn, due to the bulky structure in which the convergence of the filament group is disturbed, the specular reflection light of the incident light is small and the diffuse reflection light is large. This diffuse reflected light is absorbed as it is repeatedly reflected and refracted in a bulky multi-layered structure, and the surface reflected light that is visually perceived becomes small, resulting in a deep color. Conceivable.

The dyed fabric composed of the false-twisted yarn of the sheath-core structure of the present invention is first dyed uniformly, and then a low refractive index resin is applied to the dyed fabric by a two-step process to give a bathochromic property. give. In the method of applying a resin having a low refractive index according to the present invention, it is preferable that an anionic compound is attached to the first step to cause a polyester, which is originally negatively charged, to be more negatively charged. At this time, it is preferable to perform heat treatment using a cross-linking agent in combination to more firmly fix the material.

Next, in the second step, it is preferable that a cationic low refractive index resin is uniformly adhered to form a film. Also in this case, it is preferable to use a crosslinking agent together to enhance the fixing effect. The addition of the anionic compound in the first step plays a role of more firmly fixing the particles of the deep-coloring agent which is a cationic low refractive index resin used in the second step.

As the anionic compound, higher alcohol sulfate ester, alkylallyl sulfonic acid,
Examples thereof include perfluoroalkylcarboxylic acid, perfluoroalkylphosphoric acid ester, and sulfite ester salt. In the present invention, it is preferable to use a polycarboxylic acid, which can further enhance the anionic property of the polyester fiber and enhance the adhesion effect of the low refractive index resin.

In the conventional bathochromic processing by one-step processing, there was a problem in the bathochromic property when the antibacterial treatment was carried out next time. However, the two-step processing of the present invention carries out antibacterial treatment as shown below. However, the bathochromic property is hardly deteriorated and a deep black color can be obtained. The low refractive index resin used in the present invention preferably has a refractive index lower than that of the fibers constituting the cloth. Specifically, those having a refractive index of 1.5 or less are preferable,
More preferably, it is 1.4 or less.

Examples of the low refractive index resin include fluorine-containing compounds such as tetrafluoroethylene, polyfluoroethyl acrylate and polyfluorovinylidene, silicon-containing compounds such as polydimethylsilane and polydimethylsiloxane,
Examples thereof include acrylic acid esters such as polyethyl acrylate and polyethyl methacrylate. The method of applying the low refractive index resin in the production method of the present invention, the refractive index of a dry film obtained by polymerizing a monomer having a polymerizable unsaturated bond in the presence of a polyurethane emulsion having thermosetting reactivity is It is desirable to use a low aqueous resin composition in combination with a fluorine-containing compound or a silicon-containing compound as exemplified above.

Here, the urethane emulsion refers to an emulsion of thermosetting reactivity obtained by reacting a compound having an amino group with a urethane prepolymer having an isocyanate group at the terminal. The monomer having an unsaturated bond refers to a polymerizable monomer having a polymer refractive index of 1.5 or less. Fluorine-containing compounds and silicon-containing compounds are
Each of them alone has a low refractive index and can provide a bathochromic effect, but when used alone, the problem of the slimyness that is a characteristic of silicon compounds, large slippage, and markedly poor sewability, and the texture of fluorine compounds become hard. There is a problem of passing too much.

The water-based resin composition forms fine irregularities on the surface so that the incident light is absorbed by the resin film or is absorbed inside the fiber to further reduce the refractive index of the silicon compound or the fluorine compound. A synergistic dark color effect is obtained by adding the coating effect of the rate resin. In the production method of the present invention,
The fabric subjected to deep color processing is further subjected to antibacterial treatment.

The antibacterial agent used in the present invention is a quaternary ammonium salt. Since the deep-colored fabric as described above forms a film with a low refractive index and has a deep color effect, it is necessary to use something that does not interfere with the above film by antibacterial treatment. When salt is used, it has almost no effect on bathochromic properties. Antibacterial agents other than quaternary ammonium salts, especially those insoluble in water and having a large particle size, inhibit fine irregularities on the surface of a resin having a low refractive index and do not enhance the bathochromic effect.

The antibacterial treatment method may be either a dipping method or a padding method, but the padding method is preferable from the viewpoint of production efficiency and effect. In the production method of the present invention, it is preferable to use a compound represented by the following general formula as the quaternary ammonium salt.

[0019]

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The present invention uses the above antibacterial agent at 0.01%
Add 1.0% owf from f. More preferably, 0.
It is from 02% owf to 0.5% owf. It is particularly preferably 0.05% owf to 0.2% owf. If the adhered amount is 0.01% owf or less, the antibacterial property is not sufficiently exhibited, and if the adhered amount is 1.0% owf or more, the antibacterial property is sufficient but the bathochromic property and the fastness are deteriorated, which is not preferable.

Further, in the production method of the present invention, it is preferable to use a binder resin in order to improve durability. The binder resin is not particularly limited, but it is preferable to use a melamine resin. The durability of the melamine resin is improved by partially reacting with the quaternary ammonium salt. Melamine resin is 0.05% owf to 1.0% ow
It is preferable to add f. More preferably 0.05
% Owf to 0.5% owf. It is particularly preferably 0.05% owf to 0.3% owf.

If the melamine resin content is 0.05% or less, the antibacterial washing durability becomes insufficient, and if it is 1.0% owf or more, the texture becomes hard. In addition to the melamine resin, any compounding agent such as an emulsifier, a leveling agent, an antistatic agent, etc. may be added. In the production method of the present invention, it is preferable to heat-treat the fiber after applying the antibacterial agent, the binder resin, and the other treating agent, and it is possible to form a film-like film on the fiber by heat-treating, or a mesh-like film when seen in detail. Therefore, excellent durable antibacterial and deodorant performance can be obtained.

[0023]

The present invention will be specifically described below with reference to examples.
The methods for measuring physical properties were as follows. (1) L value Macbeth CE-3000 (manufactured by Sakata Inx Co., Ltd.,
The product name was used for the measurement. (2) Antibacterial property The following method for measuring the number of bacteria and the washing method described in the method for evaluating the effect of processing hygiene products by the Hygiene Products Council of Textile Products were followed.

For the measurement of the number of bacteria, a sterilized sample cloth was poured and inoculated with a broth suspension of the following test bacteria. First, for the antibacterial untreated product, the number of bacteria (A) dispersed and recovered immediately after inoculation was measured, and then
The sample cloth inoculated with the bacteria was cultured at 37 ° C. for 18 hours and then dispersed and collected, and the numbers of bacteria in the antibacterial untreated product (B) and the antibacterial treated product (C) were measured. Immediately after inoculation with antibacterial untreated product and
After culturing for 18 hours, the measurement and evaluation were carried out under the condition that the relation with the following requirements was satisfied.

Log (B / A)> 2 The difference in the increase / decrease value of the number of bacteria was calculated by log (B / C), and those having a value of 1.6 or more were judged as acceptable.
Staphylococcus aureus (Staphylococcus aureus) was used as the test bacterium.

[0026] Laundry is a neutral detergent, Monogen Uni (P & G
(Trade name, manufactured by Co., Ltd.) was used to measure immediately after culturing, before and after washing.

[0027]

Example 1 A fabric was prepared under the following conditions. 3250m /
Partially oriented unstretched yarn (POY) of polyester multifilament having Δn of 0.04, which was wound at a winding speed of 1 minute.
71d / 48f, non-contact with hollow heater, temperature 150 ° C., heat treatment time 0.5 sec, relaxation rate 3
Relaxation heat treatment was performed at 8%.

The POY yarn after the relaxation heat treatment and the regular polyester multifilament yarn of 75d / 24f with Δn of 0.15 were fed at a feed rate of 1.5.
%, Aligned without any difference in feed rate, interlaced, and false twisted at a false twist temperature of 160 ° C. and a false twist number of 2425 T / m to obtain a sheath-core structure false twisted yarn. The obtained sheath-core structure false twisted yarn has a yarn length difference of 20% between the sheath yarn and the core yarn, and WS of the sheath yarn
2.0%, DS 0.9%, core yarn WS 10.0
% And DS were 12.1%.

The obtained false-twisted yarn having a sheath-core structure is 1400T.
/ M of additional twist, and then used as a weft to make a woven fabric having a five-sheet satin (two-step) design. Then, dyeing was performed under the following conditions. Disperse dye Dianix Black RN-SE (trade name, manufactured by Mitsubishi Chemical Corporation) 10% owf Disper VG (trade name, manufactured by Meisei Chemical Industry Co., Ltd.) 0.5 g / liter CH ₃ COOH (48%) 1 g / liter Bath ratio 1:50 Dyeing temperature 130 ° C. × 60 minutes Dyeing machine Hi-Di dyeing machine (trade name, manufactured by Todoroki Sangyo Co., Ltd.) Further, reduction washing was performed under the following conditions.

NaOH 1 g / liter Hydrosulfite 2 g / liter Bath ratio 1:50 Treatment temperature 70 ° C. × 20 minutes Then, deep color processing was performed under the following conditions.

Carboxylic acid resin, Schwat A-10 (manufactured by Kao Corporation, trade name) 100 g / l, glyoxal-based cross-linking agent, Schwat N-20 (manufactured by Kao Corporation, trade name) 0.1 g / l A bath is prepared, and the dyed fabric is treated by a padding method, and then dried at 140 ° C. for 4 minutes. Furthermore, an acrylic-urethane resin containing a silicon compound, a SWAT TR-440 (manufactured by Kao Corporation, trade name, solid content concentration 15%) 40 g / liter, and a SWAT N-20 bath of 2 g / liter were prepared by a padding method. After the treatment, it was dried at 120 ° C. for 4 minutes. Further, it was baked at 180 ° C. for 1 minute.

Further, antibacterial treatment was performed under the following conditions. Nikkanon RB of quaternary ammonium salt (manufactured by Nichika Chemical Co., Ltd., trade name, solid content concentration 15%) 12 g / liter, Sumitex Resin M-3 of melamine resin (Sumitomo Chemical Co., Ltd.,
Brand name, solid content concentration 80%) 2 g / liter, isopropyl alcohol 30 g / liter bath was prepared, and the fabric subjected to deep color processing was treated by padding method, and then at 120 ° C. for 4 hours.
Dried for minutes. Further, it was baked at 180 ° C. for 2 minutes.

[0033]

Comparative Example 1 The antibacterial treatment was carried out in the same manner as in Example 1 except that the dyed cloth obtained in Example 1 was deep-color processed under the following conditions. The bathochromic processing conditions are Asahi Guard 740 (manufactured by Meisei Chemical Industry Co., Ltd.), a nonionic aqueous fluororesin 40
A bath of g / liter was prepared, the fabric was treated by the padding method, and then dried at 120 ° C. for 4 minutes. 1 at 180 ° C
Bake for minutes.

[0034]

Comparative Example 2 Example 1 was repeated except that the fabric obtained in Example 1 and subjected to the deep color processing was subjected to an antibacterial processing treatment under the following conditions.
Antibacterial processing was performed in the same manner as. The antibacterial processing conditions are aminoglycoside ST-8 (manufactured by Biomaterials Co., Ltd., trade name) 1
A bath of 0 g / liter, 2 g / liter of Sumitex Resin M-3 and 30 g / liter of isopropyl alcohol was prepared, and the cloth was treated by the padding method, and then dried at 120 ° C. for 4 minutes. Further, it was baked at 180 ° C. for 2 minutes.

[0035]

[Example 2] Dyeing, deep color processing and antibacterial treatment were carried out in the same manner as in Example 1 except that the false-twisted yarn having a sheath-core structure and the fabric were prepared under the following conditions. A 75 d / 25 f polyester multifilament yarn (elongation 42%) obtained at a spinning winding speed of 7,000 m / min was used as a low elongation yarn, and a spinning winding speed of 4
A polyester multifilament yarn with an elongation of 42% and a polyester multifilament yarn with an elongation of 116% were used, using a 75d / 48f polyester multifilament yarn (elongation 116%) obtained at 500 m / min as a high elongation yarn. Alignment was performed in the same manner as in Example 1 except that
Interlace treatment and false twisting were performed to obtain a sheath-core structure false twisted yarn.

The false-twisted sheath-core structure false twisted yarn having a difference in yarn length of 11% between the obtained sheathed yarn and core yarn was subjected to additional twisting of 1200 T / m. The additional twisted sheath-core structure false-twisted yarn obtained was used as a warp, and 150 d /
A satin and thin yarn of a polyester multifilament yarn of 48f, which was additionally twisted at 1200 T / m, was used as a weft yarn to fabricate a five-satin (two-step) woven fabric.

[0037]

[Example 3] Deep color processing and antibacterial treatment were performed in the same manner as in Example 1 except that a woven fabric was produced in the same manner as in Example 2 except that 150 d / 36 f round cross section regular polyester multifilament yarn was used as the weft yarn. Processed.

[0038]

[Table 1]

[0039]

Industrial Applicability According to the production method of the present invention, it is possible to obtain a polyester cloth which is easy to express a dark color and has excellent antibacterial properties. The dyed fabric of the polyester filament of the present invention is black and has an L value of 11 or less and has deepness, has wash resistance and antibacterial properties, and has a bathochromic property as compared with the conventional one.
It has excellent antibacterial and deodorant properties and excellent durability.

Claims (3)

[Claims] 1. A dyed fabric composed of a false twisted yarn having a sheath-core structure, wherein the false twisted yarn having a sheath-core structure is false twisted by aligning two or more kinds of polyester multifilaments having different elongations. And a resin having a low refractive index is added, and the quaternary ammonium salt content is 0.01 to
A cloth characterized by being provided with 1% owf. 2. A sheath-core structure false-twist textured yarn, wherein the yarn length difference between the sheath yarn and the core yarn is 10% or more, and the wet heat shrinkage ratio (WS) at 130 ° C. is 3% or less in the sheath yarn. The fabric according to claim 1, wherein the core yarn has a dry heat shrinkage (DS) at 160 ° C of 10% or more, the sheath yarn has a dry heat shrinkage ratio of 1.5% or less, and the core yarn has a dry heat shrinkage ratio of 12% or more. 3. A fabric made of false-twisted sheath-core structure yarn in which two or more kinds of polyester multifilaments having different elongation differences are aligned and false-twisted, and then a low-refractive-index resin is applied to A method for producing a fabric, which comprises applying the quaternary ammonium salt after the step is added to the step.