JP2019085679A - Woven/knitted fabric and method for producing the same - Google Patents

Abstract

To provide a woven/knitted fabric including a polyester fiber that has antistatic properties and water absorption each excellent in durability against industrial washing, is suppressed in processing unevenness and has good feeling.SOLUTION: The woven/knitted fabric includes a polyester fiber and has a vinyl polymer produced by polymerizing a difunctional vinyl monomer containing polyoxyalkylene adhered to the surface of the polyester fiber. The woven/knitted fabric produced by performing high-speed fluid flow treatment after the polymerization of the difunctional vinyl monomer has antistatic properties and water absorption each excellent in durability against industrial washing, and additionally is suppressed in processing unevenness with high grade and a small variation in performance.SELECTED DRAWING: None

Description

  The present invention relates to a woven or knitted fabric containing polyester fibers, having antistatic properties and water absorbency excellent in industrial laundry durability, suppressing processing unevenness, and further having a good texture. The present invention also relates to a method of producing the woven or knitted fabric.

  Polyester fibers are used in a wide range of fields, such as clothing and industrial materials, because they are excellent in strength, color fastness, etc. and have high versatility in processing. In recent years, with the development of electronics industry, medicine, medical equipment, precision instruments, food processing and medical technology, fine dust and gas in manufacturing sites and medical sites and static electricity become obstacles, so the cleaning of their environment is promoted It is done. As part of that, polyester fiber cloth is being developed as a work cloth that can cope with a clean environment.

  Particularly in the social situation where the population is aging, in the field of care and medical care, much effort is made to make the working clothes clean from the viewpoint of safety and hygiene, and the material of the working clothes has excellent electrical washing properties with excellent industrial laundry durability, A function of water absorption is required.

  In order to meet such demands, polyester fiber fabrics having functionality such as antistatic properties and water absorbability have been studied. For example, Patent Document 1 discloses that a fiber structure in which the entire surface of a single fiber is covered with a polyethylene glycol resin can be provided with antistatic properties and antifouling properties. Further, in Patent Document 2, a resin film containing a compound having a polyalkylene oxide segment and an acryl group or a methacryl group as a polymerization component, and a resin film containing a specific trimethylolmelamine as a polymerization component on the fiber surface of a single fiber It is disclosed that the laminated fiber structure can be provided with functions such as water absorption excellent in durability, anti-static property, anti-soiling property, anti-melting property and the like. Patent Document 3 has a resin film containing as a polymerization component a polymerizable monomer having a polyalkylene oxide segment and an acryl group or a methacryl group and / or a triazine ring-containing polymerizable monomer on the surface of a single fiber, It is disclosed that a fiber structure in which particles of an aluminosilicate are contained in the film may have antistaticity and water absorption in addition to deodorizing and antibacterial properties. Patent Document 4 has a resin film containing a triazine ring-containing polymerizable monomer as a polymerization component on the surface of a single fiber, and a hydrophilic polyester resin is contained in the film. It is disclosed that the fiber structure can be provided with a highly durable antifouling property. In Patent Document 5, a fiber structure in which a resin film containing a triazine ring-containing compound is formed on the surface of the fiber is formed, and the resin film is graft-polymerized with a hydrophilic vinyl monomer to have an acidic group, It is disclosed that it can have excellent antifouling properties.

JP-A-62-162079 JP, 2007-146313, A JP, 2009-133035, A JP, 2008-163474, A JP, 2008-240206, A

  However, in the techniques of Patent Documents 1 to 6, the raw material monomer (unreacted substance) of the polymer to be attached to the fiber surface remains, causing unevenness on the fabric, and causing defects in grade deterioration and performance variation. Further, in the technology of Patent Document 1, even though the antistatic property and the antifouling property can be maintained after 30 times of home washing, the technology does not have the durability in industrial washing and is not satisfactory in terms of the durability. . Furthermore, in the techniques of Patent Documents 2 to 5, since the triazine ring-containing compound which is a thermosetting resin is used at a high concentration, the texture becomes hard and it is unsuitable for a work clothes.

  An object of the present invention is a woven or knitted fabric containing polyester fibers, which has excellent antistatic property and water absorption excellent in industrial laundry durability, is suppressed in processing unevenness, and has a better texture. To provide.

  The inventors of the present invention conducted intensive studies to solve the above problems, and as a result, a vinyl-based polymer comprising a polyester-based fiber, in which a bifunctional vinyl-based monomer containing polyoxyalkylene is polymerized on the surface of the polyester-based fiber A woven or knitted fabric which is attached and obtained by high-speed liquid flow treatment after polymerization of the bifunctional vinyl monomer has antistatic property and water absorbability excellent in industrial laundry durability, Moreover, it has been found that the processing unevenness is suppressed, the quality is high, and the performance variation is small. Furthermore, it has been found that the woven or knitted fabric has good texture, firmness, and swelling, and has a texture suitable for working clothes. The present invention has been completed by repeating studies based on such findings.

That is, the present invention provides the invention of the aspects listed below.
Item 1. A woven or knitted fabric containing polyester fibers,
The surface of the polyester fiber is adhered with a vinyl polymer obtained by polymerizing a difunctional vinyl monomer including polyoxyalkylene,
A woven or knitted fabric obtained by high-speed flow treatment after polymerization of the difunctional vinyl monomer.
Item 2. The woven or knitted fabric according to Item 1, wherein 0.5 to 5 parts by mass of the vinyl polymer is contained per 100 parts by mass of the total amount of constituent fibers of the woven or knitted fabric.
Item 3. Item 3. The woven or knitted fabric according to item 1 or 2, wherein the vinyl polymer contains a melamine resin.
Item 4. The woven or knitted fabric according to any one of Items 1 to 3, wherein the vinyl polymer contains a polyester resin.
Item 5. The woven or knitted fabric according to any one of Items 1 to 4, wherein the film thickness of the vinyl-based polymer adhering to the surface of the polyester-based fiber is 50 to 200 nm.
Item 6. Item 6. The woven or knitted fabric according to any one of Items 1 to 5, wherein the friction belt voltage after industrial laundering measured by the following test method is 1000 V or less.
<Test method>
(Conditions of industrial washing)
In the method F-2 (medium temperature washer method) prescribed in JIS L 1096: 2010, “After washing once under conditions of temperature 60 ° C. and time 300 minutes, wash and dry operation at temperature 40 ° C. and temperature 50” Change the conditions to “dry under conditions of 60 ° C. for 30 minutes with a tumble dryer after changing twice for 40 minutes with temperature of 40 ° C. for a total of 5 cycles of the washing / drying operation .
(Measurement conditions of friction voltage)
Textiles after the above-mentioned industrial laundering under an environment of 20 ° C. and 40% RH, in accordance with method B (frictional band voltage measurement method) defined in “Testing method of electrification of textiles and knits” in JIS L 1094: 2014. Measure the friction voltage of
Item 7. The woven or knitted fabric according to any one of Items 1 to 6, wherein the water absorption and diffusion area after industrial washing measured by the following test method is 400 mm ² or more.
<Test method>
(Conditions of industrial washing)
In the method F-2 (medium temperature washer method) prescribed in JIS L 1096: 2010, “After washing once under conditions of temperature 60 ° C. and time 300 minutes, wash and dry operation at temperature 40 ° C. and temperature 50” Change the conditions to “dry under conditions of 60 ° C. for 30 minutes with a tumble dryer after changing twice for 40 minutes with temperature of 40 ° C. for a total of 5 cycles of the washing / drying operation .
(Measurement conditions of water absorption and diffusion area)
From the fabric after the industrial laundering, a test piece of 20 cm long x 20 cm wide is prepared. 40 μL of water is dropped onto the test piece by performing the operation prescribed in “7.1.1 Drop method” of “7.1 Water absorption rate method” of JIS L-1907: 2010. 60 seconds after dropping water, the area of the area where the water is diffused is measured with a test piece, and this is determined as a water absorption and diffusion area.
Item 8. A method for producing a woven or knitted fabric, comprising a polyester-based fiber, wherein a vinyl-based polymer obtained by polymerizing a difunctional vinyl-based monomer containing polyoxyalkylene is attached to the surface of the polyester-based fiber.
A process comprising: contacting a surface of a polyester-based fiber of a woven or knitted fabric containing a polyester-based fiber with radically polymerizing the bifunctional vinyl-based monomer; and performing a high-speed flow treatment on the woven or knitted fabric after the step.
Item 9. The high-speed liquid flow process is a process of causing the woven or knitted fabric to pass through the cleaning liquid being jetted at a high speed, wherein the cleaning liquid is jetted at an angle of 10 ° or more with respect to the traveling direction of the woven or knitted fabric passing therethrough. The manufacturing method described in.

  In the woven or knitted fabric of the present invention, processing unevenness is suppressed by subjecting the surface of the polyester fiber to polymerization of a difunctional vinyl monomer containing polyoxyalkylene followed by high-speed liquid flow treatment, and moreover, the durability of industrial washing It is possible to have excellent antistatic property and water absorption. Furthermore, the woven or knitted fabric of the present invention has a good firmness, stiffness, and swelling, and has a texture suitable for work clothes. Therefore, the woven or knitted fabric of the present invention is suitable as a material of a garment to be worn in a field where hygiene management is strict (for example, food production site, pharmaceutical production site, medical institution, etc.).

  The woven or knitted fabric of the present invention is a woven or knitted fabric containing polyester fibers, and a vinyl polymer obtained by polymerizing a difunctional vinyl monomer containing polyoxyalkylene is attached to the surface of the polyester fibers, and It is characterized in that it is obtained by high-speed flow treatment after polymerization of the difunctional vinyl monomer. Hereinafter, the woven and knitted fabric of the present invention will be described in detail.

[Component yarn]
The woven or knitted fabric of the present invention contains polyester fibers (multifilament yarns containing polyester monofilaments) as constituent yarns.

  The type of polyester resin constituting the polyester fiber is not particularly limited, and examples thereof include aromatic polyesters such as polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate; cationic dyeable polyester, polylactic acid and the like . Among these, preferably aromatic polyester, more preferably polyethylene terephthalate is mentioned.

  The single fiber fineness of the polyester fiber is not particularly limited, but may be, for example, 0.1 to 10.0 dtex, preferably 0.3 to 8.0 dtex, and more preferably 0.5 to 6.0 dtex. . If the single yarn fineness is 0.1 dtex or more, a feeling of hardness is imparted, and it becomes easy to wear when made into clothing. Moreover, if single yarn fineness is 10.0 dtex or less, it will not become too hard and feel will be good.

  The total fineness of the polyester-based fiber is not particularly limited, but may be, for example, 30 to 300 dtex, preferably 50 to 250 dtex, and more preferably 70 to 180 dtex. When the total fineness is 50 dtex or more, sufficient strength can be imparted to the woven or knitted fabric, and when the total fineness is 300 dtex or less, the fabric does not become too hard and feel is good.

  The number of filaments constituting the polyester fiber is determined according to the single fiber fineness and the total fineness of the single fiber to be used, and examples thereof include 1 to 400, preferably 10 to 200, and further 20 to 100.

  The cross-sectional shape of the polyester fiber monofilaments is not particularly limited, and may be either a circular cross section or an irregular cross section.

  In addition, the polyester fiber may contain titanium dioxide, silicon dioxide, a pigment and the like depending on the characteristics to be imparted.

  The polyester fiber may be a raw yarn not subjected to false twisting, or may be false twisted yarn.

  In the woven and knitted fabric of the present invention, other fibers may be contained as constituent fibers in addition to the polyester-based fibers as long as the effects of the present invention are not impaired. Examples of such other fibers include synthetic fibers such as nylon and acrylic; regenerated fibers such as rayon; semi-synthetic fibers such as acetate; and natural fibers such as cotton and wool.

  In the woven or knitted fabric of the present invention, the mixing ratio of polyester fibers is not particularly limited as long as desired antistatic property, water absorption, and suppression of processing unevenness can be expressed, but for example, 50% by mass or more, preferably 80 mass% or more, More preferably, 100 mass% is mentioned.

[Organization and density of woven fabric]
When the woven or knitted fabric of the present invention is a woven fabric, polyester fibers may be used for at least one of the warp yarns and weft yarns, preferably both, and the warp and weft yarns may be crossed to form a structure. When making the woven or knitted fabric of the present invention into a woven fabric, the structure thereof is not particularly limited, and examples thereof include flats, scissors, forceps, and modified structures thereof.

  When the woven or knitted fabric of the present invention is a knitted fabric, polyester fibers may be used to form a structure by continuous yarn loops. When making the woven or knitted fabric of the present invention into a knitted fabric, the structure thereof is not particularly limited, and may be either a warp knitted fabric or a weft knitted fabric. Examples of warp knitting include Denby knitting, Cord knitting, Atlas knitting and the like, and specific examples thereof include Tricot half, Tricot satin and the like. Further, as the weft knit, for example, plain knit, rubber knit, pearl knit, smooth knit, etc. may be mentioned, and specifically, Tengu, Kanoko, smooth etc. may be mentioned.

  When the woven or knitted fabric of the present invention is a woven fabric, the woven density may be appropriately set according to the application of the woven fabric, for example, a warp density of 30 to 250 yarns / inch, preferably 50 to 200 yarns. And preferably 60 to 150 yarns / inch; and 30 to 250 yarns / inch, preferably 50 to 200 yarns / inch, more preferably 55 to 150 yarns / inch.

  When the woven or knitted fabric of the present invention is a knitted fabric, the knitting density may be appropriately set according to the application of the knitted fabric etc., but for example, 40 to 100 courses / inch, preferably 50 to 80 courses / inch And 30 to 80 wales / inch, preferably 40 to 60 wales / inch.

  A woven or knitted fabric containing polyester fibers can be obtained by weaving and knitting using polyester fibers.

[Surface treatment with vinyl polymer]
In the woven or knitted fabric of the present invention, a vinyl-based polymer in which a difunctional vinyl-based monomer containing polyoxyalkylene is radically attached adheres to the surface of a polyester-based fiber which is a constituent fiber. As described above, the polyester fiber is coated with a vinyl-based polymer having a specific structure, and manufactured through high-speed liquid flow processing to be described later. It becomes possible to realize suppression and good feeling.

  Although it does not restrict | limit in particular about carbon number of the alkylene group which comprises the alkylene oxide contained in a bifunctional vinyl-type monomer, For example, 2-5, 2 or 3, preferably 2 is mentioned more preferably. When the carbon number of the alkylene group is 3 or more, the alkylene group may be linear or branched.

  The addition mole number of the alkylene oxide contained in the bifunctional vinyl-based monomer is not particularly limited, and may be, for example, 3 to 30, preferably 10 to 26, and more preferably 20 to 25. By satisfying the addition mole number of such an alkylene oxide, it becomes possible to more suitably impart the antistatic property and the water absorbability excellent in industrial laundry durability.

  Specific examples of the difunctional vinyl monomer containing polyoxyalkylene include compounds in which an acryl group and / or a methacryl group is connected to both ends of polyoxyalkylene, and more specifically, polyoxyalkylene And diacrylate, dimethacrylate, epoxy diacrylate, epoxy dimethacrylate and the like.

As a suitable example of the bifunctional vinyl-type monomer containing polyoxyalkylene, the compound shown to following General formula (1) or (2) is mentioned.

In the general formula (1), R ¹ and R ² are the same or different and are a hydrogen atom or a methyl group. As R ¹ and R ² , preferably, a methyl group is mentioned.

In general formula (1), R ³ is an alkylene group having 2 to 5 carbon atoms. R ³ preferably includes an alkylene group having 2 or 3 carbon atoms (ie, a methylene group or a propylene group), and more preferably an alkylene group having 2 carbon atoms (ie, a methylene group). When the carbon number is 3 to 5, the alkylene group of R ³ may be linear or branched.

  In the general formula (1), n is an integer of 3 to 30. In the general formula (1), n is preferably 10 to 26 from the viewpoint of more effectively suppressing processing unevenness while more suitably imparting the antistatic property and the water absorbability excellent in industrial laundry durability. And particularly preferably 20 to 25.

In the general formula (2), R ⁴ and R ⁵ are the same or different and are a hydrogen atom or a methyl group. As R ¹ and R ² , preferably, a methyl group is mentioned.

In formula (2), R ⁶ is an alkylene group having 2 to 5 carbon atoms. R ⁶ preferably includes an alkylene group having 2 or 3 carbon atoms (ie, a methylene group or a propylene group). When the carbon number is 3 to 5, the alkylene group of R ⁶ may be linear or branched.

  In the general formula (2), n is an integer of 3 to 30. In the general formula (2), m is preferably 10 to 26 from the viewpoint of more effectively suppressing processing unevenness while more suitably imparting the antistatic property and the water absorbability excellent in industrial laundry durability. And particularly preferably 20 to 25.

  The vinyl polymer obtained by radical polymerization of a difunctional vinyl monomer containing polyoxyalkylene may contain a resin other than the difunctional vinyl monomer. As such resin, a melamine resin, a polyester resin, etc. are mentioned, for example. These resins may be used alone or in combination of two or more. Melamine resin can be further improved in the antistatic property and the water absorbability excellent in industrial laundry durability by crosslinking to the vinyl polymer. In addition, the polyester resin, when present in a state of being bonded or mixed with the above-mentioned vinyl polymer, can further improve the antistatic property and the water absorbability excellent in industrial laundry durability.

  The melamine resin may be a thermosetting resin obtained by condensation of a compound having a triazine ring and having at least two polymerizable functional groups, and specific examples thereof include trimethylolmelamine and hexamethylolmelamine. As the melamine resin, for example, trimethylol such as "Riken Resin MM-3C", "Riken Resin MM-35" (above, manufactured by Miki Riken Kogyo Co., Ltd.), "Beckamine M-3" (manufactured by DIC Kita Nippon Polymer Co., Ltd.), etc. Commercial products such as hexamethylolmelamine such as melamine; “Riken Resin MM-601”, “Riken Resin MM-630” (all manufactured by Miki Riken Kogyo Co., Ltd.) (all manufactured by Miki Riken Kogyo Co., Ltd.) can be used .

  When the vinyl-based polymer contains a melamine resin, the melamine resin is used in an amount of 1 to 100 parts by mass, preferably 5 to 50 parts by mass, and more preferably 10 to 30 parts by mass, per 100 parts by mass of the bifunctional vinyl monomer used. The ratio may be used.

  The polyester resin may be a hydrophilic polyester ether copolymer obtained by copolymerizing polyethylene glycol with a polyester segment consisting of an acidic component and a glycol component. Examples of the acid component include dimethyl terephthalate, dimethyl isophthalate, 5-sodium sulfo isophthalic acid, terephthalic acid, isophthalic acid, and adipic acid. These acid components may be contained singly or in a combination of two or more in the polyester resin. Also, as the glycol component, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,4-butanediol, 1,6-hexanediol, 1,6-hexane Diol, diethylene glycol and the like can be mentioned. These glycol components may be contained alone in the polyester resin, or two or more may be contained. Examples of the polyester resin include “SR-1000”, “SR-1800”, “SR-6200” (all manufactured by Takamatsu Yushi Co., Ltd.), “Parasorb PET-2” (manufactured by Ohara Palladium Chemical Co., Ltd.), Commercially available products such as "Nicepol PR-99" (manufactured by Nikka Chemical Co., Ltd.) can be used.

  When a polyester resin is contained in the vinyl polymer, the polyester resin is contained in an amount of 1 to 100 parts by mass, preferably 5 to 50 parts by mass, and more preferably 10 to 30 parts by mass per 100 parts by mass of the bifunctional vinyl monomer used. The ratio may be used.

  In the woven or knitted fabric of the present invention, the adhesion amount of the vinyl-based polymer to be attached to the surface of the polyester fiber which is the constituent fiber can be appropriately set according to the degree of suppression of the antistatic property, water absorption and processing unevenness to be applied. For example, the amount of the vinyl polymer is 0.5 to 5 parts by mass, preferably 0.5 to 4 parts by mass, and more preferably 1 to 3 parts by mass, per 100 parts by mass of the total amount of constituent fibers.

  In the woven or knitted fabric of the present invention, the film thickness of the vinyl polymer to be attached to the surface of the polyester fiber which is the constituent fiber may be appropriately set according to the degree of suppression of the antistatic property, water absorbency and processing unevenness to be applied. For example, it may be 50 to 200 nm, preferably 50 to 100 nm. By satisfying such a film thickness, it is possible to more effectively suppress processing unevenness while further suitably providing the antistatic property and the water absorbability excellent in industrial laundry durability.

  The adhesion of the vinyl-based polymer to the surface of the polyester-based fiber is carried out by attaching a difunctional vinyl-based monomer to the knitted fabric containing the polyester-based fiber and radically polymerizing it, as described later. Therefore, in the woven or knitted fabric of the present invention, the adhesion mode of the vinyl-based polymer to the surface of the polyester-based fiber is (i) an aspect in which the vinyl-based polymer is chemically bonded to the surface of the polyester-based fiber, (ii) polyester Among the embodiments in which the vinyl polymer is attached without chemical bonding on the surface of the base fiber, a combination of either one or both of the embodiments is envisioned.

  In the woven or knitted fabric of the present invention, obtained by contacting the surface of a polyester fiber with a difunctional vinyl monomer and radically polymerizing it, removing the remaining monomer and excess polymer attached between fibers by high-speed liquid flow treatment. Be As described above, by performing high-speed liquid flow treatment after radical polymerization of a bifunctional vinyl-based monomer, it is possible to suppress processing unevenness while imparting the antistatic property and the water absorbability excellent in industrial laundry durability. . Hereinafter, in the woven or knitted fabric of the present invention, a method of attaching a vinyl-based polymer to the surface of a polyester-based fiber will be described in detail.

  A woven or knitted fabric woven and knitted using polyester fibers is prepared. The woven and knitted fabric may be subjected to processing such as desizing, presetting, dyeing, etc., as needed, before the vinyl polymer is attached.

  Next, the prepared woven or knitted fabric is contacted with a bifunctional vinyl monomer. In order to bring the bifunctional vinyl monomer into contact with the woven or knitted fabric, the woven or knitted fabric may be impregnated with a treatment liquid containing the bifunctional vinyl based monomer.

  Examples of the treatment liquid include an aqueous solution in which a difunctional vinyl monomer, and optionally, a melamine resin and / or a polyester resin are dispersed or dissolved. The concentration of the bifunctional vinyl monomer in the treatment liquid may be appropriately set according to the amount of vinyl polymer to be attached, the conditions of radical polymerization, etc., but, for example, 0.5 to 10% by mass, preferably 1 -7 mass% is mentioned.

  Moreover, in order to accelerate | stimulate the radical polymerization of a bifunctional vinyl-type monomer, the said processing liquid may contain the polymerization initiator. As a polymerization initiator, for example, inorganic polymerization initiators such as ammonium persulfate, potassium persulfate, cerium ammonium nitrate, hydrogen peroxide and the like; 2,2'-azobis (2-amidinopropane) dihydrochloride, 2,2 Radical initiators, such as organic type radical initiators, such as' -azobis (N, N'- dimethylene isobutyramidin) dihydrochloride and 2- (carbamoylazo) isobutyro nitrile etc. are mentioned. One of these polymerization initiators may be used alone, or two or more thereof may be used in combination. The concentration of the polymerization initiator in the treatment liquid is not particularly limited and may be appropriately set according to the type of the polymerization initiator to be used, for example, the polymerization initiator per 100 parts by mass of the bifunctional vinyl monomer. 0.1 to 20 parts by mass, preferably 0.3 to 15 parts by mass, and more preferably 0.5 to 10 parts by mass.

  Further, the treatment liquid may contain a polymerization inhibitor, if necessary. When the polymerization inhibitor is contained, polymerization in a low temperature range can be suppressed, and it becomes easy to obtain a vinyl-based polymer having a desired degree of polymerization. As a polymerization inhibitor, for example, quinones such as benzoquinone, hydroquinone, and methoxyphenol; polyphenol compounds such as tert-butyl catechol; organic sulfur compounds such as sodium dimethyldithiocarbamate, diethylhydroxylamine; nitro compounds; diethylhydroxylamine, isopropyl And amino compounds such as hydroxylamine. One of these polymerization inhibitors may be used alone, or two or more thereof may be used in combination. The concentration of the polymerization inhibitor in the treatment liquid is not particularly limited and may be appropriately set according to the type of the polymerization inhibitor to be used, for example, the polymerization inhibitor per 100 parts by mass of the bifunctional vinyl monomer. 0.01 to 2 parts by mass, preferably 0.015 to 1.5 parts by mass, and more preferably 0.02 to 1 parts by mass.

  In addition, in order to enhance the polymerization efficiency, the treatment liquid may contain, if necessary, a redox initiator comprising a peroxide and a reducing substance. Examples of peroxides used for the redox initiator include ammonium persulfate, potassium persulfate and the like, and as a reducing substance used for the redox initiator, a reaction product of sodium sulfoxylate and formalin, Hydrosulfite etc. are mentioned.

  The amount by which the treatment solution is impregnated into the woven or knitted fabric may be appropriately set according to the concentration of the difunctional vinyl monomer in the treatment solution, the amount of the vinyl polymer to be attached, the conditions of radical polymerization, etc. For example, 20 to 150 parts by mass, preferably 30 to 120 parts by mass, more preferably 50 to 100 parts by mass of the treatment liquid may be mentioned per 100 parts by mass of the woven or knitted fabric.

  It does not restrict | limit especially about the method to impregnate the said process liquid with respect to a woven fabric, What is necessary is just to use suitably well-known methods, such as a padding method, a spray method, a kiss roll coater method, a slit coater method.

  After the woven or knitted fabric is impregnated with the treatment solution, a difunctional vinyl monomer is radically polymerized.

  In order to radically polymerize the bifunctional vinyl-based monomer, for example, a wet heat treatment, an exhaustion treatment, an electron beam treatment, an ultraviolet ray treatment, a microwave treatment or the like may be performed. The conditions for radical polymerization may be appropriately selected according to the type of treatment to be employed, the concentration of the bifunctional vinyl monomer in the treatment liquid, the amount of vinyl polymer to be attached, etc. For example, in the case of wet heat treatment If it exists, it may be treated in the presence of steam at 80 to 180 ° C., preferably 98 to 150 ° C., for 1 to 30 minutes, preferably 3 to 10 minutes.

  After radical polymerization of the bifunctional vinyl-based monomer, the obtained woven or knitted fabric (woven or knitted fabric in which a vinyl-based polymer is adhered to the surface of the polyester-based fiber) is subjected to washing by high-speed flow treatment. Thus, by subjecting to high-speed liquid flow treatment, residual monomers and excess polymer attached between fibers are highly removed, and a film of vinyl-based polymer is uniformly formed on the surface of polyester-based fibers. . By this, in the woven or knitted fabric of the present invention, it is possible to suppress processing unevenness while having the antistatic property and the water absorbability excellent in industrial laundry durability. In addition, such high-speed liquid flow treatment suppresses the texture of the woven or knitted fabric from becoming hard, and further suppresses the occurrence of discoloration or the decrease in color fastness due to the elution of the remaining monomer. It will be possible.

  In the present invention, the high-speed fluid flow treatment is a washing treatment in which the woven or knitted fabric is exposed to a washing solution being jetted at a high speed.

  As a suitable high-speed jet flow treatment, a jet-washing treatment may be carried out by passing the woven or knitted fabric through a washing solution being jetted at a high speed. Hereinafter, the high-speed liquid flow processing of this aspect will be described in detail.

  In the high-speed fluid flow treatment, the cleaning solution may be jetted from one direction to the passing woven or knitted fabric, but it is passed using a filament nozzle, a span nozzle or the like used for fluid flow dyeing or the like. It is preferable to spray the cleaning solution from all directions to the woven or knitted fabric. By injecting the cleaning solution from all directions to the woven or knitted fabric passing in this manner, it is possible to more efficiently remove the remaining monomer. The filament nozzle is configured by combining the nozzle pipe and the outer ring (nozzle boss), and the cleaning liquid can be jetted from the gap between the nozzle pipe and the nozzle boss to the woven or knitted fabric passing through the internal space of the filament nozzle. Is configured as. In addition, the span nozzle is configured by combining hollow frusto-conical members in one to three stages, and the cleaning liquid can be jetted from the gap of the members to the woven or knitted fabric passing through the internal space of the span nozzle. Is configured as.

  In the high-speed liquid flow processing, the angle at which the cleaning liquid is jetted to the woven or knitted fabric may be appropriately set in accordance with the time of the high-speed liquid flow processing, the temperature of the cleaning liquid, etc. It is important to spray the cleaning solution at an angle of 10 ° or more with respect to the traveling direction of the. By injecting the washing solution at such an angle, sufficient pressure is given to the woven or knitted fabric, residual monomers and excess polymer adhering between the fibers are removed to a desired degree, and the durability to industrial washing is excellent. It is possible to realize the antistatic property, the water absorption property, the suppression of processing unevenness, and the good feeling. The angle at which the cleaning liquid is jetted is preferably 10 to 40 °, more preferably 15 to 40 ° with respect to the traveling direction of the passing woven or knitted fabric.

  There is no particular limitation on the speed at which the woven or knitted fabric passes through the cleaning liquid being jetted at high speed in high-speed liquid flow processing, but for example, 50 to 600 m / min, preferably 100 to 500 m / min, more preferably 200-400 m / min can be mentioned. In the high-speed liquid flow processing, the woven or knitted fabric is moved in one direction by the pressure of the jetted cleaning liquid, and therefore, a means for causing the woven or knitted fabric to pass through the cleaning liquid jetted at high speed may not be provided.

  No particular limitation is imposed on the spray conditions of the cleaning liquid in high-speed liquid flow processing, but if, for example, a filament nozzle is used, the nozzle diameter (diameter of the internal space of the filament nozzle; perpendicular to the passing direction of the woven or knitted fabric Using a filament nozzle having a diameter of 70 to 130 mm and a gap for injecting a cleaning solution of 2 to 6 mm), the nozzle pressure at the time of spraying the cleaning solution is 0.15 to 0.5 Mpa, preferably 0.15 to 0 .4 Mpa, more preferably 0.15 to 0.3 Mpa, and the flow rate of the cleaning solution is 800 to 1,500 l / min, preferably 900 to 1,400 l / min, more preferably 1,000 to 1,300 l / min. It should be set to

  Further, in the high-speed liquid flow treatment, the number of times the woven or knitted fabric is allowed to pass through the cleaning liquid being jetted may be appropriately set within a range where the remaining monomer can be removed to a desired degree. Is preferably 5 to 50 times, more preferably 10 to 40 times. Here, the number of times the woven or knitted fabric is allowed to pass through the cleaning liquid being jetted is the number of times that the jetted cleaning liquid is passed per location of the woven or knitted fabric by high-speed liquid flow processing.

  The high-speed flow treatment for the woven or knitted fabric is carried out by circulating the rope-like woven or knitted fabric so that the woven or knitted fabric repeatedly passes through the cleaning liquid being jetted by forming the rope connecting the ends of the woven or knitted fabric. Is desirable.

  The cleaning liquid used in the high-speed liquid flow treatment may be water, but may be an aqueous solution to which a surfactant is added as needed to enhance the removal efficiency of the remaining monomers.

  In the high-speed liquid flow treatment, the temperature of the washing solution is not particularly limited, and for example, 40 to 100 ° C., preferably 50 to 90 ° C., and more preferably 60 to 80 ° C. can be mentioned. By using the washing solution of such temperature, it is possible to efficiently remove the remaining monomer and the excess polymer attached between the fibers.

  The apparatus for performing the high-speed flow treatment is not particularly limited, but a flow dyeing machine used for dyeing a fabric can be suitably used. The liquid flow dyeing machine is provided at a dyeing tank for retaining the fabric, a transfer pipe connecting both ends of the dyeing tank, and a tip of the transfer pipe, and jets a treatment liquid (in the case of the present invention, a washing solution). A fabric having an injection nozzle and connected in an endless loop shape is transferred from the outlet of the staining tank to the transfer pipe, transferred along with the treatment liquid in the transfer pipe, and circulated again to the staining tank. Is an apparatus configured to The high-speed flow processing in the present invention can be efficiently performed by using a liquid flow dyeing machine in which conditions such as the angle of the injection nozzle are adjusted to the above range. As described above, the jet nozzle provided in the jet flow dyeing machine may use a filament nozzle or a span nozzle, but is preferably a filament nozzle.

  After the high-speed flow treatment, the woven fabric of the present invention is obtained by the drying treatment. In addition, the woven or knitted fabric of the present invention after the drying treatment may be subjected to processing such as wrinkle stretching, if necessary.

[Characteristic]
The woven or knitted fabric of the present invention has an antistatic property excellent in industrial laundry durability. As a preferred example of the antistatic property of the woven or knitted fabric according to the present invention, the friction electrostatic voltage after industrial washing measured by the following test method is 1,000 V or less, preferably 50 to 800 V, in all directions of the woven or knitted fabric. More preferably, it is 100 to 600 V, particularly preferably 100 to 300 V.
<Test method>
(Conditions of industrial washing)
In the method F-2 (medium temperature washer method) prescribed in JIS L 1096: 2010, “After washing once under conditions of temperature 60 ° C. and time 300 minutes, wash and dry operation at temperature 40 ° C. and temperature 50” Change the conditions to “dry under conditions of 60 ° C. for 30 minutes with a tumble dryer after changing twice for 40 minutes with temperature of 40 ° C. for a total of 5 cycles of the washing / drying operation .
(Measurement conditions of friction voltage)
Textiles after the above-mentioned industrial laundering under an environment of 20 ° C. and 40% RH, in accordance with method B (frictional band voltage measurement method) defined in “Testing method of electrification of textiles and knits” in JIS L 1094: 2014. Measure the friction voltage of

[Characteristic]
The woven or knitted fabric of the present invention has water absorbency excellent in industrial laundry durability. Suitable examples of water-absorbent which woven or knitted fabric having the present invention, water-absorbing diffusion area after industrial washing is measured by the following test methods 400 mm ² or more, preferably 400～1500Mm ^2, more preferably 600～1000Mm ² is It can be mentioned.
<Test method>
(Conditions of industrial washing)
It is the same as the test method of the friction voltage after industrial washing.
(Measurement conditions of water absorption and diffusion area)
From the fabric after the industrial laundering, a test piece of 20 cm long x 20 cm wide is prepared. 40 μL of water is dropped onto the test piece by performing the operation prescribed in “7.1.1 Drop method” of “7.1 Water absorption rate method” of JIS L-1907: 2010. 60 seconds after dropping water, the area of the area where the water is diffused is measured with a test piece, and this is determined as a water absorption and diffusion area.

[Use]
The woven or knitted fabric of the present invention has antistatic properties and water absorbability excellent in industrial laundry durability, and also has a texture with firmness, stiffness, and swelling, so antistatic properties and charging properties are required. It is suitably used as a material of clothing. Examples of clothing requiring antistatic properties and chargeability include work clothes used in the fields of medical equipment, medicine, electronics industry, precision instruments, food processing, etc .; fields of research institutes, medical institutions, nursing institutions, etc. White coats used in

  Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited by the following examples.

1. Measurement / Test Method Measurement and evaluation in the following Examples and Comparative Examples were performed according to the following methods.
(1) Measurement of adhesion amount of surface treatment agent The adhesion amount (%) of the surface treatment agent was determined for each fabric according to the following equation.
Adhesion amount of surface treatment agent (%) = {(W1-W0) / W0} × 100
W0: Weight per unit area of fabric after dyeing W1: Weight per unit area of fabric obtained after treatment with a surface treatment agent

(2) Measurement of the film thickness of the surface treatment agent adhering to the fiber surface The fiber surface of the antistatic fabric was photographed at 20000 × with an electrolytic radiation scanning electron microscope (“SU8020”, manufactured by Hitachi High-Technologies Corporation) The film thickness of five fiber cross sections was measured, and the average value was calculated.

(3) Method of industrial laundering According to the method F-2 (medium temperature washer method) defined in JIS L 1096: 2010, after laundering once under conditions of temperature 60 ° C. for 300 minutes, the temperature of hot water is 40 ° C., After performing twice for 50 minutes at a temperature of 40 ° C. and 100 minutes for a period of time, it was dried with a tumble dryer at a temperature of 60 ° C. for 30 minutes. A total of five cycles were performed with these operations as one cycle.

(4) Measurement of antistatic property In accordance with Method B (frictional voltage measurement method) defined in "Testing method of electrification of woven fabric and knitted fabric" in JIS L 1094: 2014, under 20 ° C, 40% RH environment Friction voltage of each fabric was measured.

(5) Measurement of water absorption and diffusion properties Test pieces of 20 cm long × 20 cm wide were prepared from each fabric. 40 μL of water was dropped on the test piece by performing the operation specified in “7.1.1 Drop method” of “7.1 Water absorption rate method” of JIS L-1907: 2010. 60 seconds after water was dropped, the area of the area where water was diffused was measured with a test piece, and this was determined as the water absorption and diffusion area.

(6) Measurement of processing unevenness For each fabric of 50 m in length and 1.5 m in width, a total of six locations in the vicinity of both ends in the length direction and in the center and both ends in the width direction (near one end of the length) In the widthwise center, one end and the other end in the widthwise direction, and in the vicinity of the other end in the lengthwise direction, the center in the widthwise direction, one end and the other end in the widthwise direction The color difference ΔE that is the largest among the six measurement points was determined using a spectrophotometer (“Color-Eye 3100”, manufactured by X-Rite Co., Ltd.) with the total of six parts of the part as measurement points.

(7) Feeling About each textile, the sensory test by an expert was implemented and five steps were determined according to the following criterion.
1st class: very hard, unsuited texture for work clothes second: somewhat hard, slightly unsuitable texture for work clothes third: firm, slightly elastic but slightly swollen texture suitable for work clothes fourth: firm, koshi Texture that is suitable for work clothes with a bulge 5 grade: Texture that is very suitable for work clothes that is very stiff, stiff, and swell

2. Production of Textiles (Example 1)
A 2/2 twill fabric having a warp density of 108 / 2.54 cm and a weft density of 59 / 2.54 cm was woven using a polyester false twist yarn having a total fineness of 167 dtex / 72 filaments as warp yarn and warp yarn. The obtained twill fabric was scoured by a usual method, and was pre-set at 190 ° C. for 30 seconds in a tenter (made by Shikin Kogyo Co., Ltd.). Next, using a liquid flow dyeing machine ("Circular MF", manufactured by Nisaka Co., Ltd.), the dye is dyed at a temperature of 130 ° C. for 30 minutes under the following dye prescription and has a navy color of 180 g / m ² I got a twill cloth.
<Staining prescription>
Disperse dye 2% o. m. f
Dispersant 0.5 g / l
Acetic acid (48%) 0.2 cc / l
Water Residue As the disperse dye, “Kayalon Navy Blue ECX (300)” (manufactured by Nippon Kayaku Co., Ltd.) was used. As a dispersant, “Nikasan Salt SN130” (manufactured by Nikka Chemical Co., Ltd.) was used.

Next, the rattan fabric is dipped in a treatment solution shown in the following formulation 1 and squeezed with a mangle at a squeezing rate of 70% by mass, and without drying, 1 with a J-box steamer (manufactured by Kyoto Machine Co., Ltd.)
A saturated vapor treatment at 03 ° C. was performed for 5 minutes to perform radical polymerization of the difunctional vinyl monomer.
<Prescription 1>
・ 3% by mass of bifunctional vinyl monomer A
・ 0.15% by mass of ammonium persulfate
Water Residue The difunctional vinyl monomer A is polyethylene glycol dimethacrylate (a compound in which R ¹ and R ² are methyl, R ³ is ethylene and n is 23 in General Formula (1)) Chemical Industry Co., Ltd.) was used.

  After that, high-speed flow treatment was performed. Specifically, the high-speed liquid flow treatment uses a liquid flow dyeing machine ("Circular MF", manufactured by Hisaka Mfg. Co., Ltd.), and the injection angle of the cleaning liquid (the injection angle of the cleaning water with respect to the advancing direction of the fabric) is 40. Equipped with a filament nozzle (nozzle diameter 90 mm, gap 4 mm for spraying the cleaning solution) which is °, using water as the washing water, nozzle pressure 0.2 Mpa, flow rate of 1200 l / min when spraying the cleaning solution, cloth speed 300 m / m It was carried out by circulating the fabric (length (50 m / anti × 6 anti = 300 m)) in an endless rope form under the condition of a bath ratio of 1:10 and a temperature of 60 ° C. for 5 minutes.

  Next, drying was performed in a drum dryer under conditions of 120 ° C. for 2 minutes, and setting was performed in a tenter at 160 ° C. for 1 minute to obtain a fabric.

(Example 2)
A fabric was obtained under the same conditions as in Example 1 except that the treatment liquid of the following formulation 2 was used instead of the treatment liquid of formulation 1.
<Prescription 2>
・ 3% by mass of bifunctional vinyl monomer A
-Ammonium persulfate 0.4% by mass
· Aqueous solution containing 80% by mass of trimethylolmelamine 0.5% by mass
Water Residue The surface treatment agent A is the same as that used in the formulation 1. In addition, as an aqueous solution containing 80% by weight of trimethylolmelamine, “Veckamine M-3” (manufactured by Miki Riken Kogyo Co., Ltd.) was used.

(Example 3)
A fabric was obtained under the same conditions as in Example 1 except that the treatment liquid of the following formulation 3 was used instead of the treatment liquid of formulation 1.
<Prescription 3>
・ 3% by mass of bifunctional vinyl monomer A
-Ammonium persulfate 0.4% by mass
· Aqueous solution containing 80% by mass of trimethylolmelamine 0.5% by mass
・ Dispersion liquid containing 20% polyester resin 2% by mass
Water Residue The surface treatment agent A is the same as that used in the formulation 1. In addition, an aqueous solution containing 80% by weight of trimethylolmelamine is the same as that used in the aforementioned formulation 2. The dispersion liquid containing 20% of polyester resin used "Parasorb PET-2" (made by Ohara palladium Chemical Co., Ltd.).

(Comparative example 1)
A fabric (that is, a fabric which had been subjected to the dyeing process) was obtained under the same conditions as in Example 1 except that the treatment with the treatment solution shown in Formulation 1 was not performed.

(Comparative example 2)
A fabric was obtained under the same conditions as in Example 1 except that high-speed flow treatment was not performed.

(Comparative example 3)
A fabric was obtained under the same conditions as Example 1, except that water was used as the cleaning liquid instead of the high-speed liquid flow processing and the cleaning processing was performed with a rope washing machine (manufactured by Kimura Iron Works Co., Ltd.).

(Comparative example 4)
The conditions are the same as in Example 1 except that the cleaning treatment is carried out using a continuous open soaper (manufactured by Shandong Denko Co., Ltd.) that uses the water as the cleaning liquid and spreads in place of the high-speed liquid flow treatment. I got the fabric at. The open soaper is a continuous washing machine that dewaters with a mangle through a hot water washing tank and a washing tank. There are 5 hot water washing tank, 1 washing tank, hot water washing temperature is 80 ° C, treatment time is It took 5 minutes from dewatering after putting in the dough.

3. Results The results are shown in Table 1. As a result, in the woven fabrics of Examples 1 to 3, the maximum value of ΔE value is small, and processing unevenness is suppressed, and furthermore, they have excellent antistatic property and water absorbability even after industrial washing, and also the texture It was good. On the other hand, in the woven fabrics of Comparative Examples 1 to 4, none of the processing unevenness, the antistatic property, and the water absorbability could be satisfied.

  From the above results, it is possible to suppress unevenness in processing and to provide antistatic properties excellent in industrial laundry durability by polymerizing a difunctional vinyl monomer containing polyoxyalkylene on polyester fiber and then subjecting it to high-speed liquid flow treatment. And it became clear that it can be made to have water absorbency and also the texture suitable for work clothes.

Claims (9)

A woven or knitted fabric containing polyester fibers,
The surface of the polyester fiber is adhered with a vinyl polymer obtained by polymerizing a difunctional vinyl monomer including polyoxyalkylene,
A woven or knitted fabric obtained by high-speed flow treatment after polymerization of the difunctional vinyl monomer.   The woven or knitted fabric according to claim 1, wherein 0.5 to 5 parts by mass of the vinyl polymer is contained per 100 parts by mass of the total amount of constituent fibers of the woven or knitted fabric.   The woven or knitted fabric according to claim 1 or 2, wherein the vinyl-based polymer contains a melamine resin.   The woven or knitted fabric according to any one of claims 1 to 3, wherein the vinyl polymer contains a polyester resin.   The woven or knitted fabric according to any one of claims 1 to 4, wherein the film thickness of the vinyl-based polymer adhering to the surface of the polyester-based fiber is 50 to 200 nm. The woven or knitted fabric according to any one of claims 1 to 5, wherein the friction belt voltage after industrial laundering measured by the following test method is 1000 V or less.
<Test method>
(Conditions of industrial washing)
In the method F-2 (medium temperature washer method) prescribed in JIS L 1096: 2010, “After washing once under conditions of temperature 60 ° C. and time 300 minutes, wash and dry operation at temperature 40 ° C. and temperature 50” Change the conditions to “dry under conditions of 60 ° C. for 30 minutes with a tumble dryer after changing twice for 40 minutes with temperature of 40 ° C. for a total of 5 cycles of the washing / drying operation .
(Measurement conditions of friction voltage)
Textiles after the above-mentioned industrial laundering under an environment of 20 ° C. and 40% RH, in accordance with method B (frictional band voltage measurement method) defined in “Testing method of electrification of textiles and knits” in JIS L 1094: 2014. Measure the friction voltage of The woven or knitted fabric according to any one of claims 1 to 6, wherein the water absorption and diffusion area after industrial washing measured by the following test method is 400 mm ² or more.
<Test method>
(Conditions of industrial washing)
In the method F-2 (medium temperature washer method) prescribed in JIS L 1096: 2010, “After washing once under conditions of temperature 60 ° C. and time 300 minutes, wash and dry operation at temperature 40 ° C. and temperature 50” Change the conditions to “dry under conditions of 60 ° C. for 30 minutes with a tumble dryer after changing twice for 40 minutes with temperature of 40 ° C. for a total of 5 cycles of the washing / drying operation .
(Measurement conditions of water absorption and diffusion area)
From the fabric after the industrial laundering, a test piece of 20 cm long x 20 cm wide is prepared. 40 μL of water is dropped onto the test piece by performing the operation prescribed in “7.1.1 Drop method” of “7.1 Water absorption rate method” of JIS L-1907: 2010. 60 seconds after dropping water, the area of the area where the water is diffused is measured with a test piece, and this is determined as a water absorption and diffusion area. A method for producing a woven or knitted fabric, comprising a polyester-based fiber, wherein a vinyl-based polymer obtained by polymerizing a difunctional vinyl-based monomer containing polyoxyalkylene is attached to the surface of the polyester-based fiber.
A process comprising: contacting a surface of a polyester-based fiber of a woven or knitted fabric containing a polyester-based fiber with radically polymerizing the bifunctional vinyl-based monomer; and performing a high-speed flow treatment on the woven or knitted fabric after the step.   The high-speed fluid flow process is a process of causing a woven or knitted fabric to pass through a cleaning liquid being jetted at a high speed, wherein the cleaning liquid is jetted at an angle of 10 ° or more with respect to the traveling direction of the woven or knitted fabric being passed. The manufacturing method as described in 8.