JPH04202846A - Production of water-repellent and deep-colorable fiber structure - Google Patents

Abstract

PURPOSE:To obtain the title structure having excellent endurance as well as water repellent properties and deep colorable properties by applying a silicone based water repellent to a fiber structure and then irradiating the treated fiber structure with ultraviolet ray. CONSTITUTION:A silicone based and/or fluorine based water repellent (preferably containing a light initiator) expressed by the formula (R1 to R6 are H, OH, CnH2n+1, -CH2OH or -CONH2; n is integer) and containing a melamine resin is applied to a fiber structure (e.g. sport clothing or uniform clothing) and then the treated fiber structure is irradiated with an ultraviolet ray (preferably containing <=300nm wavelength ingredient) to provide the objective structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing a fibrous structure having durable water repellency and bathochromic properties.

[Prior Art] In recent years, there has been an increasing demand for water repellency mainly in the fields of sports clothing and uniform clothing, and along with this, there is a strong desire to improve the durability of water repellency against dry cleaning and washing.

Currently, fabrics are made water repellent by treating them with silicone or fluorine-based water repellents.

However, silicone water repellents easily swell with dry cleaning solvents such as trichlene and percrene.
It dissolves and has little resistance to dry cleaning. Also, silicone alone has a low level of water repellency.
The current situation is that it cannot meet the recent demands for high water repellency.

On the other hand, fluorine-based water repellents have a high initial level of water repellency, but
Since the resin coating is hard (and brittle), it has the disadvantage that the resin coating cracks when washed or rubbed during wear, resulting in a decrease in water repellency. I haven't gotten anything.

In addition, when conventional water-repellent products made of silicone or fluorine resin are washed or dry-cleaned, methyl groups or -C, which contribute to water repellency, are removed.
It had a serious drawback in that F3 groups and the like penetrated into the resin film, resulting in a significant drop in water repellency.

Furthermore, in the field of sports clothing and black formal wear, there is a strong demand for deep color and sharpness from the viewpoint of water repellency as well as fashionability, and various studies are being carried out.

Silicone-based and fluorine-based water repellents, which are generally used as water-repellent finishing agents, simultaneously cause deep coloring, but as mentioned earlier, there are problems with the durability of the resin itself, resulting in a decrease in water repellency and deep coloring. A decline in sexuality occurs at the same time.

On the other hand, with regard to deepening the color, a number of studies have been carried out, especially on polyester, such as adding colloidal silica to the polymer and creating fine irregularities by alkali reduction, and creating irregularities on the fiber surface by plasma etching. However, applying a durable water-repellent finish to this would involve adhering a hydrophobic water-repellent resin to the hydrophilized fiber surface, so the adhesiveness of the resin is sufficient. However, there is no other product that has both durable water repellency and deep color.

[Problems to be Solved by the Invention] An object of the present invention is to provide a method for producing a fabric that has high water repellency, deep color, and excellent durability against washing or dry cleaning.

[Means for Solving the Problems] The present invention has the following configuration to achieve the above object.

That is, the method for producing a water-repellent, bathochromic fiber structure of the present invention involves applying a silicone-based and/or fluorine-based water repellent containing an epoxy resin and/or a melamine resin to the fiber structure, and then exposing the fiber structure to ultraviolet rays. It is characterized by irradiation.

[Effect] The present invention will be explained in detail below.

Here, the silicone-based compound refers to a silicone-based water repellent that is generally used as a water repellent or a softener. For example, dimethylpolysiloxane, dimethylpolysiloxane, Examples include oils or emulsions of polysiloxane compounds modified by introducing hydroxyl groups, amino groups, hydrogen, epoxy groups, polyether groups, etc. into the side chains.

In addition, the fluorine-containing compound is usually a polyacrylic ester consisting of polyacrylic acid and a fluorinated alcohol, such as polypentadecafluorooctyl acrylate, polytrifluoroethyl acrylate, polytrifluoroethyl acrylate, or tetrafluoroethylene- Examples include fluorine-based hydrocarbons such as hexafluoropropylene copolymers.

The melamine resin of the present invention is a compound represented by the following general formula.

R3-N R4 In the formula, R-R6 are each independently -H1-0H1-O
CrlH2o+1, -CH20H.

-CONH2, etc., and n represents an integer.

Such melamine resin has the effect of promoting crosslinking by ultraviolet rays and increasing durability. The amount of the melamine resin used is preferably 0.1 to 1 based on the weight of the water repellent agent.
00%, more preferably 0.5 to 30%.

As the epoxy resin referred to in the present invention, any compound containing an epoxy group can be used, and for example, neopentyl glycol, diglycidyl ether, glycol polyglycidyl ether, sorbitol polyglycidyl ether, etc. can be used.

The epoxy resin forms a crosslinked structure when irradiated with ultraviolet rays and significantly increases the bathochromic property, and preferably accounts for 0.1 to 70%, more preferably 5 to 40%, based on the weight of the water repellent agent. It is preferable to use

The photoinitiator as used in the present invention is one that is excited by irradiation with ultraviolet rays, generates free radicals, causes a chain growth reaction with surrounding monomers, oligomers, and polymers, and creates a crosslinkable polymer structure. There are the following compounds.

Examples of acetophenone include 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-
(4-isopropylphenyl)-2-hydroxy-2-
Examples of the benzoin series include benzoin, benzoin methyl ether, benzoin isopropyl ether, and benzyl methyl ketal.The benzophenone series includes benzif and non-benzoin. , benzoylbenzoic acid, methyl benzoylbenzoate,
4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl-4'
-methyldiphenyl sulfide, etc., and examples of thioxanthone include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2. Examples include thidimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, and 2,4-diethylthioxanthone. These compounds are
One kind or a mixture of two or more kinds can be used. Since the absorption efficiency of such photoinitiators differs depending on the wavelength of ultraviolet rays, it is desirable to select a photoinitiator with good efficiency by selecting the wavelength to be used.

The amount of the photoinitiator added to the water repellent resin is 0.05.
~30%, preferably 0. The amount is 5 to 20%, and if the amount is outside this range, a sufficient crosslinked structure may not be obtained.

In the ultraviolet irradiation treatment of the present invention, a high pressure mercury lamp, a metal halide lamp, a xenon lamp, a low pressure mercury lamp, etc. can be used as a light source, but preferably 300 nm.
A low-pressure mercury lamp that generates the following ultraviolet rays is preferable, and a low-pressure mercury lamp having peaks at 184.9 nm and 253.7 nm is preferable. The irradiation intensity of such ultraviolet rays is preferably 3 mw/a1 or more, more preferably 10 mv/d or more at a wavelength of 253.7 nm. It is sufficient for the irradiation time to be on the order of seconds to minutes, but the irradiation intensity and the irradiation time may be set depending on the purpose. For example, the irradiation intensity of ultraviolet light is 40mW with a wavelength of 253.7nm.
/Ci, the range of about 15 to 90 seconds is water repellent,
It is particularly preferred because it provides an excellent fiber structure with a good balance of bathochromic properties and durability.

After the ultraviolet irradiation of the present invention, heat treatment at 160 to 200°C may be performed. Such ultraviolet irradiation significantly improves bathochromic properties, resulting in excellent durability in both bathochromic properties and water repellency.

The fiber structure of the present invention refers to all fiber molded products such as knitted fabrics, nonwoven fabrics, threads, and strings made of natural fibers, regenerated fibers, synthetic fibers, or yarns of a mixture thereof.

[Example] The present invention will be explained below with reference to Examples.

Note that the performance evaluations shown in Examples and Comparative Examples were measured by the following method.

Water repellency: Test method specified in J I5-L1079 (
It was measured and evaluated using the spray method.

Furthermore, durability was determined by repeating the following washing or dry cleaning test 20 times and then performing the water repellency test described above.

The relationship between the appearance state and the evaluation score for water repellency is as follows.

100 points: No adhesive moisture on the surface; 90 points; slight adhesive moisture on the surface; 80 points; water drop points on the surface indicating moisture; 70 points; partial moisture over the entire surface; 50 points. ; 0 points if the entire surface is wet; 0 points if the surface is completely wet.
Pour 0.2% weakly alkaline synthetic detergent (as specified in JIS K337) into a 40°C ± 2°C washing machine (Model 50), add additional cloth so that the bath ratio is 1:50, and wash under strong conditions for 10 minutes. Then, the process of draining and washing with water for 5 minutes was repeated 20 times, and then air-dried.

Dry cleaning (DC) is a dry cleaning cylinder (a cylinder with a diameter of 22 cm and a length of about 33 marks. It is 45 to 5 Q
3.81 perchloroethylene at room temperature was placed in a 230 g test piece and rotated for 10 minutes, which was repeated 50 times, and then air-dried.

Color development: 17 values of the fabric were measured using a digital color measurement color difference calculator (manufactured by Suga Test Instruments). The L value is an index of the visual density of a color, and the smaller the value, the darker the color.

Discoloration during washing and dry cleaning was evaluated by measuring the L value after washing in the same manner as in the water repellency test.

Examples 1 to 15, Comparative Examples 1 to 7 Cashmere skin fabric consisting of a polyester processed yarn (Toshiku Yoshidari) with a warp yarn of 75 denier and 48 filaments and a polyester processed yarn (manufactured by Toshiku) with a weft yarn of 100 denier and 24 filaments. After scouring in a conventional manner and heat setting at a temperature of 180°C, Diamondix Black B
G-FS (Dianix Black BG-FS)
Dyeing was carried out at 130°C for 60 minutes at 14% owt and a bath ratio of 1:30. Subsequently, reduction cleaning, drying, and 160℃
Finished and set, width 15Qcm, density, vertical 154 pieces/
It was made into a black fabric with a width of 110 pieces/inch.

The fabrics were subjected to the following treatments as shown in Table 1.

(Water repellent) a. Toray Silicone SH8240 (OT-1 modified silicone emulsion, manufactured by Toray Silicone ■) 20
g/l b, NK Guard FG270 (Fluorine water repellent, Nicca Chemical) 20g/l (Melamine resin) Sumitex Resin M-3 (Sumitomo Chemical) 2g/l (Epoxy resin) Bunacol EX-313 (Jepoxy compound.

(manufactured by Nagase Kasei) 5 g/A' (Photoinitiator) Darocure 1116 (1-(4-isopropylphenyl)-2-hydroxy-2-methylpropan-1-one: manufactured by Merck Japan Co., Ltd.) 0.5 g/l For the resin treatment, after immersing the fabric in the treatment liquid, apply 80% of the treatment liquid to the weight of the fabric using a mangle, dry it at 130℃ for 3 minutes, and if necessary, heat treat it at 180℃ for 2 minutes. Ta.

(Ultraviolet irradiation) Low pressure mercury lamp: Lamp output 500 W Illuminance 40 my/al (254 nm) Treatment time 5 to 120 seconds The water repellency, bathochromic property and durability of the obtained fabric were evaluated,
The results are shown in Table 1.

As is clear from Table 1, Examples 1 to 10 simultaneously satisfy water repellency and bathochromic properties, but none of Comparative Examples 1 to 7 satisfies both performances with good durability. Comparative Example 4.5 was poor in water repellency, Comparative Example 6.7 was poor in bathochromic property, and Comparative Examples 1 to 3 were all extremely poor in performance.

[Effects of the Invention] The present invention can provide a fiber structure having excellent durability, water repellency, and bathochromic properties.

Patent applicant Higashi Shikikai Co., Ltd.

Claims (3)

[Claims] (1) A water-repellent, bathochromic fiber structure characterized by applying a silicone-based and/or fluorine-based water repellent containing an epoxy resin and/or melamine resin to the fiber structure and then irradiating it with ultraviolet rays. Manufacturing method. (2) The manufacturing method according to claim (1), wherein the water repellent agent contains a photoinitiator. (3) The manufacturing method according to claim (1), wherein the ultraviolet rays contain a wavelength component of 300 nm or less.