JPH04202847A - Production of water-repellent and deep-colorable fiber structure - Google Patents

Abstract

PURPOSE:To obtain a fiber structure having excellent endurance as well as high water-repellent property and deep-colorable property by irradiating a fiber structure with ultraviolet ray and then treating the fiber structure with a fluorine based water repellent agent, etc. CONSTITUTION:A fiber structure such as sport clothing or uniform clothing is irradiated with ultraviolet ray (containing <=300nm wavelength ingredient) and then treated with a fluorine and/or silicone based water repellent (e.g. polypentadecafluorooctyl acrylate or dimethylpolysiloxane) to provide the objective structure.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a fibrous structure that is highly durable, highly water repellent, and has excellent 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 it 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 is characterized in that the fiber structure is irradiated with ultraviolet rays and then treated with a fluorine-based water repellent and/or a silicone-based water repellent. That is.

[Function] According to the present invention, when a fiber structure that has been subjected to ultraviolet irradiation treatment is subsequently treated with a water repellent finishing agent, the performance of the finishing agent is improved by 100%.
%, and it was found that the durability of the processing agent coating could also be improved. The silicone-based water repellent agent in the present invention can be a silicone-based compound that is generally used as a water repellent or a softener. Oils or emulsions of polysiloxane compounds modified by introducing hydroxyl groups, amino groups, hydrogen, epoxy groups, polyether groups, etc. into side chains can be used.

Further, as the fluorine-based water repellent finishing agent, a fluorine-based compound such as a polyacrylic acid ester usually composed of polyacrylic acid and a fluorine-based alcohol can be used.

Examples of such compounds include polypentadecafluorooctyl acrylate, polytrifluoroethyl acrylate, polytrifluoroethyl acrylate, and fluorine-based compounds such as tetrafluoroethylene-hexafluoropropylene copolymer. .

The ultraviolet irradiation treatment of the present invention is, for example, treatment of irradiating ultraviolet rays from a light source such as a high-pressure mercury lamp, a metal halide lamp, a xenon lamp, or a low-pressure mercury lamp.

Such ultraviolet rays preferably have a wavelength of 30 Qnm or less, particularly 184.9 nm and 253.9 nm.
A low pressure mercury lamp with a peak at 7r++n is preferably used. The irradiation intensity of such ultraviolet rays is 253.7 nm.
at a wavelength of 3 mw/cnf or more, preferably 1
0 mw/art or more is good. 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, for ultraviolet irradiation treatment, in the case of a wavelength of 253°7 nm, 45 mW
/ci for a period of about 5 to 60 seconds for excellent water repellency, bathochromic properties, and durability.

In the present invention, after the fiber structure is irradiated with ultraviolet rays, it may be further heat-treated at 160 to 200°C.

When a water repellent agent is applied after irradiation with the ultraviolet rays of the present invention, the effect of improving the uniform adhesion of the water repellent agent to the fiber surface and its adhesion can be achieved.

Due to the uniform thin film effect of the fluorine-based water repellent and silicone water repellent, it is possible to obtain high bathochromic properties, and of course, it is possible to manufacture products that are also water repellent and have good durability. .

The water repellent agent of the present invention may contain additives such as a crosslinking agent, an antistatic agent, a softener, and a hard finishing agent within a range that does not impede the effects of the present invention.

The fiber structure of the present invention refers to a structure formed from fibers, such as a knitted fabric, nonwoven fabric, yarn, string, etc., made of natural fibers, recycled synthetic fibers, or threads made of a mixture of these fibers. be.

[Example] The performance values shown in Examples and Comparative Examples were measured by the following method.

Water repellency: Measured and evaluated using the test method (spray method) specified in J r 5-L1079.

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

The relationship between the appearance condition and the evaluation score is as follows.

100 points: 90 points with no adhering moisture on the surface; 80 points with slight adhering moisture on the surface; 70 points with moisture at the point where water falls on the surface; 50 points with partial moisture over the entire surface. : Items that show moisture on the entire surface. Items that show moisture on the entire surface. Wash with an automatic reversing whirlpool electric washing machine (Toshiba VH115).
Pour 0.2% weakly alkaline synthetic detergent (specified in JIS K337) at 40°C ± 2°C into a tank (type 0), and adjust the bath ratio to 1.
:50, and washed under strong conditions for 10 minutes, then drained and washed with water for 5 minutes.This process was repeated 20 times, and then air-dried.

For dry cleaning, perchlorethylene 3.81 at room temperature is placed in a dry cleaning cylinder (a cylinder with a diameter of 22 cm and a length of approximately 33 cm, which rotates at 45 to 50 rpm around an axis tilted 50 degrees from the axis of the cylinder). This process was repeated 50 times, with 230 g of test piece placed therein and rotated for 10 minutes, followed by air drying.

Color development: The L value of the fabric was 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 is determined by measuring the L value after washing in the same manner as in the water repellency test.

Examples 1 to 6, Comparative Examples 1 to 4 Cashmere skin fabric consisting of a polyester processed yarn (manufactured by Toshi ■) with a warp yarn of 75 denier and 48 filaments and a polyester processed yarn (manufactured by Toshi ■) with a weft yarn of 100 denier and 24 filaments. After scouring by a conventional method and heat setting at a temperature of 180℃, Diax Black BG
-FS (Diamix Black BG-FS)
Dyeing was carried out at 130°C for 60 minutes at 14% owl and a bath ratio of 1:30. Subsequently, it was subjected to reduction washing, drying, and final setting at 160° C. to obtain a black fabric having a width of 150 cm, a warp thread density of 154 threads/inch, and a weft thread density of 110 threads/inch.

This dyed fabric was treated with ultraviolet light under the following conditions.

(Ultraviolet irradiation) Low-pressure mercury lamp 500W Illuminance 45 mw/ad (253.7 nm) Treatment time 30.120 sec The fabrics subjected to the ultraviolet irradiation treatment were each treated with the following mixed treatment solution.

The types and concentrations of the water repellent agents used are as follows.

(A) Toray Silicone 5H8240 (Silicone resin, manufactured by Toray Silicone ■) 15g/A
' (B) NK Guard FG270 (Fluorine resin manufactured by NICCA Chemical ■) 15 g // (C) Asahi Guard AG710 (Fluorine resin manufactured by Kasei Kagaku) 2 Q g / (! Resin to be mixed with the water repellent agent and the crosslinking agent and concentration are as follows.

Sumitex Resin M-3 (Melamine resin made by Sumitomo Chemical) 3g // Sumitex Resin ACX (Crosslinking catalyst made by Sumitomo Chemical) 0.3g // Nice Paul F
E22 (Antistatic agent Nicca Chemical Co., Ltd.) 10g/l After immersing the above-mentioned fabric in this mixed treatment solution, squeeze it with a mangle, apply 80% of the treatment solution based on the weight of the fabric, and
Drying was performed at 30°C for 3 minutes.

Then, heat treatment was performed at 180° C. for 1 minute.

The water repellency, deep color, and durability of the obtained fabric were evaluated, and the results are shown in Table 1.

In Examples 1 to 6, compared to Comparative Examples 1 to 4,
It had high bathochromic properties, water repellency, and excellent durability.

Example 7, Comparative Examples 5 to 6 A serge made of black dyed yarn of polyester/wool blended with 20% wool was irradiated with the ultraviolet rays of Example-1 for 3Q.
sec, then immersed in NK Guard FG-300 (fluororesin) 20g//aqueous solution, squeezed with a mangle to a weight of 80% of the fabric weight, and heated at 130℃ for 4 hours.
After drying for 1 minute, heat treatment was performed at 170° C. for 2 minutes (Example 7).

As Comparative Example 6, a sample treated in the same manner as in Example 7 but not irradiated with ultraviolet rays was prepared.

Table 2 shows the results of evaluating the bathochromic properties, coloring properties, and durability.

Note that Comparative Example 5 is a sample that is not subjected to ultraviolet rays or resin processing.

From Table 2, Example 7 had superior color development, water repellency, and durability compared to Comparative Example 5.6.

[Results of the Invention] The present invention provides a fiber structure that is durable and has excellent water repellency and bathochromic properties at the same time, and is therefore suitable as an industrial material and a clothing material. I can do it.

Patent applicant Higashi Shikikai Co., Ltd.

Claims (2)

[Claims] (1) A method for producing a water-repellent, bathochromic fibrous structure, which comprises irradiating the fibrous structure with ultraviolet rays and then treating it with a fluorine and/or silicone-based water repellent. (2) The manufacturing method according to claim (1), wherein the ultraviolet rays contain a wavelength component of 300 nm or less.