JPH04202865A - Production of colored yarn structure - Google Patents

Abstract

PURPOSE:To obtain colored yarn structure having excellent dyeability and durability by providing yarn structure with an acrylic resin at a stage before or after dyeing of the yarn structure and irradiating the yarn structure with ultraviolet light. CONSTITUTION:Yarn structure, especially polyester yarn, is provided with an acrylic resin containing a light initiator at a stage before or after dyeing and irradiated with ultraviolet light having <=300nm wavelength component so that the yarn structure is extremely darkly colored to give colored yarn structure having slight change of color by washing and dry cleaning and excellent dyeability in an industrial production level. An acrylate containing one or more vinyl groups may be used as the acrylic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a fiber structure with excellent color development and durability.

[Prior Art] Synthetic fibers, especially polyester fibers, are widely used as general clothing materials because of their excellent functionality. However, when compared with other textile materials for clothing, polyester fibers are inferior in color development, and in terms of dark colors, especially black color development, they are inferior to natural fibers such as silk and wool, and semi-synthetic fibers such as acetate and rayon. In fact, it is inferior to other synthetic fibers such as nylon and acrylic fibers, and is recognized as the biggest drawback of polyester fibers, and many studies have been made to solve this problem.

The reason why polyester fibers have low color development is because the refractive index of polyester polymers is higher than other fibers.
This is because there is a lot of light reflection on the fiber surface and the dye existing inside the fiber does not absorb it sufficiently.

Many studies have been made to improve the coloring properties of polyester fibers. For example, the most direct improvement method is to form a resin film with a low refractive index such as silicone or fluorine on the fiber surface to facilitate the entry of light (Japanese Patent Application Laid-Open No. 11-1192). However, it has not been put into practical use because the resin lacks durability against washing and dry cleaning.

In recent years, many high color development technologies using plasma have been reported, such as those that etched the fiber surface,
There are also methods that involve applying microparticles such as silicon oxide to the fiber surface and then etching it, but these methods have not yet been commercialized because their uneven surface structure is weak against friction and lacks practicality.

[Problems to be Solved by the Invention] The present invention aims to provide a method for manufacturing a fiber structure that has excellent coloring properties at an industrial production level and is less likely to discolor due to washing or dry cleaning. It is something to do.

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

That is, in the method for producing a colored fiber structure of the present invention, when producing a colored fiber structure, an acrylate resin is applied either before or after dyeing the fiber structure, and then ultraviolet rays are applied. It is characterized by irradiation.

[Function] The present invention was achieved by discovering that when an acrylate resin is treated with ultraviolet rays, the color development of colored fibers is surprisingly improved significantly. Such acrylate resin is a resin that has never been used in the past as a technology for improving color development.

Such acrylate resin may be any acrylate (including methacrylate) having one or more vinyl groups.

For example, as a monomethacrylate, CH3 CH2=C-C0-(OCH3-CH2) -0CH
3n=2-23, β-methacryloyloxyethylhydrodiene n=2
-9 and lauryl acrylate, and dimethacrylates include n=1-23, 1,6-hexanethiol dimethacrylate, or 2,2-bis[4-(methacryloxy polyethoxy)phenyl]propane. Yes, and the diacrylate is CH2=C)I-CO-OCCH2-CH,! 0)
Acrylate resins such as QC-C)I=CH2n=4 to 14 can be used, and trimethylolpropane trimethacrylate, trimethylolpropane triacetate, tetramethylolmethane triacrylate, tetramethylolmethanetetraacrylate, etc. can also be used. I can do something.

In the present invention, one or a mixture of two or more of these resins is applied to the fiber structure before or after dyeing.

In the present invention, it is important to irradiate ultraviolet rays after applying the acrylate resin. In other words, merely adding an acrylate resin does not produce a deep coloring effect, but strangely, irradiation with ultraviolet rays significantly deepens the color.

In the ultraviolet irradiation of the present invention, a high-pressure mercury lamp, a methyl halide lamp, a xenon lamp, a low-pressure mercury lamp, etc. can be used as a light source, but preferably one containing an ultraviolet component of 300 nm or less, particularly 184.9 nm,
A low pressure mercury lamp with a peak at 253.7 nm is preferred.

The irradiation intensity of such ultraviolet rays has a wavelength of 253.7 nm, and is preferably 3 mw/a1 or more, preferably 10 nv/d or more (the irradiation time is sufficient for seconds to minutes, but it is suitable for the purpose The irradiation intensity and processing time may be set accordingly.

The photoinitiator used in the present invention is one that is excited by irradiation with ultraviolet rays, then generates free radicals, and causes a chain growth reaction with surrounding monomers, oligomers, and polymers to create a crosslinkable polymer structure. For example, as an acetophenone type, 2-hydroxy-2-methyl-1
-Phenylpropan-1-one, 1-(4-isopropylphenyl)-2-hydroxy-2-methylpropane-
Examples include 1-one, 1-hydroxycyclohexylphenyl ketone, and the like.

Examples of hengeine include benzoin, benzoin methyl ether, benzoin isopropyl ether,
Examples of benzophenone types such as benzyl methyl ketal include benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, thiophenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, and 4-benzoyl-4'-methyldiphenyl sulfide; examples of thioxanthone types include: For example, thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4 dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone, etc. I can do it. These photoinitiators can be used alone or in combination of two or more. The amount of the photoinitiator added to the acrylate resin is preferably 0.05 to
A good range is 30%, more preferably 0.5 to 20%.

The deep coloring phenomenon of the above-mentioned acrylate resins caused by UV irradiation is not clear at present, but even when observing the surface condition using an electron microscope, no unevenness such as etching is observed, and a uniform film-like surface is observed. Since the resin is adhered, it is thought that chain polymerization occurs due to ultraviolet rays, and an efficient effect is exerted by forming a uniform film on the fiber surface.

Further, it is preferable to use a photoinitiator because it is effective in controlling the rate of the polymerization reaction and contributes to shortening the ultraviolet irradiation time and improving durability.

The fiber structure as used in the present invention refers to a woven or knitted fabric, a non-woven fabric, or the like made of filaments such as synthetic fibers and natural fibers, and spun yarn.

The present invention can achieve particularly great effects when applied to polyester fiber structures that are particularly deficient in color development.

[Examples] Next, the present invention will be described in more detail based on Examples, but the present invention is not limited to these Examples.

The color development was evaluated by measuring the L value of the fabric using a digital colorimetric 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 due to washing and dry cleaning is treated three times according to the methods specified in JIS, LO844 and LO860, respectively, and the color change compared to the untreated fabric is determined by JIS.
The grade was determined using the gray scale for discoloration and fading specified in IS, LO804. The closer the grade is to grade 5, the less discoloration there is.

Examples 1-10. Comparative Examples 1 to 4 75 denier 36 filament polyester processed yarn (
A cashmere skin fabric using 100 denier 24 filament polyester processed yarn (manufactured by Toshi ■) as the warp yarn and 100 denier 24 filament processed polyester yarn (manufactured by Toshi ■) as the warp thread, was refined and dried in a conventional manner, and then heated at a temperature of 190℃. Heat set and then Dia
mix BIackBG -FS (manufactured by Mitsubishi Kasei) 12%
Staining was carried out at 135° C. for 60 minutes at a bath ratio of 1:50 using OVF. Next, it was reduced and washed by a conventional method, dried, and finished and set at 170°C to obtain a black fabric.

The black fabric was immersed in a 15 g/l aqueous or methanol solution of various acrylate resins, squeezed with a mangle, coated with a treatment solution of 85% of the weight of the fabric, and dried.

(Type of resin) A: Phenyl diethylene glycol acrylate B: Polyethylene glycol (PEG400) dimethacrylate C: Polyethylene glycol (PEG100O) dimethacrylate D: 1.6-hexanediol dimethacrylate E Nitrimethylolpropane trimethacrylate F: Tetramethylolmethane Tetraacrylate (ultraviolet irradiation) Lamp used: Low pressure mercury lamp input electric crab 500W Illuminance: 20-40 my/cd (253,7r++n
) Treatment time = 30-120 seconds (photoinitiator) 1-(4-isopropylphenyl)-2-hydroxy-
2-methylpropan-1-one was used in an amount of 5% based on the acrylate resin.

Table 1 shows the color development improvement effect and durability of the obtained colored fabric.

As is clear from Table 1, Examples 1 to 10 have superior coloring performance (deep color) compared to Comparative Examples 1 to 4.
showed that.

In addition, the example has excellent anti-static performance, and after washing it
Frictional charging voltage in an atmosphere of 0°C and 30% RH (J l5
-L-1094) was 5000V in Comparative Example 3, while it was 2800V in Example 7.

[Effects of the Invention] According to the present invention, a colored fiber structure having excellent bathochromic properties can be stably provided.

Patent applicant Higashi Shikikai Co., Ltd.

Claims (3)

[Claims] (1) A colored fiber structure characterized in that when producing a colored fiber structure, an acrylate resin is applied at a stage either before or after dyeing the fiber structure, and then ultraviolet rays are irradiated. manufacturing method. (2) The method for producing a fiber structure with excellent color development according to claim (1), wherein the acrylate resin contains a photoinitiator. (3) The method for producing a colored fiber structure according to claim (1), wherein the ultraviolet light has a wavelength component of 300 nm or less.