JP2006144161A - Polyester fiber structure and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polyester fiber structure having improved color deepness, its durability and fastness of color and provide a method for producing the structure. <P>SOLUTION: The polyester fiber structure has an amino resin coating film containing silicon oxide and formed on the surface of a polyester fiber. The structure is produced by applying an aqueous liquid containing an amino resin monomer, silicon oxide and a catalyst to a polyester fiber structure and steaming the product to form an amino resin coating film containing silicon oxide on the surface of the fiber. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

   The present invention relates to a polyester fiber structure excellent in deep color and durability and a method for producing the same.

  Polyester fibers have excellent physical and chemical properties and are widely used as general clothing. However, when compared with natural fibers such as wool and silk, and semi-synthetic fibers such as rayon and acetate, the biggest remaining drawback is that color developability is poor. Therefore, in particular, many studies have been made to increase the deep color of black. For example, as a method of treating a polyester fiber fabric dyed black with a low refractive index compound, a method of treating with a fluorine compound (patented) Reference 1), treatment with a urethane compound (see Patent Literature 2), treatment with a silicone compound (see Patent Literature 3), and treatment with a urethane compound and an epoxy compound (see Patent Literature 4) ) Has been proposed.

  Although these means improve the level of deep color of polyester fibers, there are problems of durability that the level of deep color decreases due to washing, and that the fastness of dyeing decreases due to dye bleeding. It was.

Another method has been proposed in which fine irregularities are formed on the fiber surface and light is irregularly reflected on the fiber surface to improve deep color. For example, a method of forming an unevenness by subjecting a fiber to which fine inorganic particles have been added to alkali reduction (see Patent Document 4) and a method of etching the fiber surface with plasma (see Patent Document 5) are considerably deep colors. However, there was still a problem in durability, such as the unevenness of the fiber surface being easily damaged, and the deep color property being lowered due to friction between fabrics.
JP 57-29682 A JP-A-56-73175 JP-A-64-45466 JP-A 1-1118684 Japanese Patent Laid-Open No. 54-120728

  Accordingly, an object of the present invention is to provide a polyester fiber structure having improved deep color, durability and dyeing fastness, and a method for producing the same, in view of the background of the prior art.

  The present invention employs the following means in order to solve the above problems. That is, the polyester fiber structure of the present invention is a polyester fiber structure characterized in that an amino resin film containing silicon oxide is formed on the surface of the polyester fiber.

  One of the preferred embodiments of the polyester fiber structure of the present invention is that the amino resin is an amino resin composed of a polymer having a melamine compound as a monomer, and more preferably represented by the following general formula: It is an amino resin composed of a polymer of the monomer shown.

  Also, one of the preferred embodiments of the polyester fiber structure of the present invention is that the average particle diameter of the silicon oxide is in the range of 10 to 500 nm, and the weight mixing ratio of the silicon oxide is 100 weights of the monomer. It is 5 parts by weight or more.

  One of the preferred embodiments of the polyester fiber structure of the present invention is that the surface of the amino resin film is further coated with a low refractive index resin.

  Moreover, the method for producing a polyester fiber structure according to the present invention provides a polyester fiber structure with an aqueous solution containing an amino resin monomer, silicon oxide and a catalyst, followed by steaming to form silicon oxide on the fiber surface. A method for producing a polyester fiber structure, comprising forming an amino resin film to be contained.

  One of the preferred embodiments of the method for producing a polyester fiber structure of the present invention is to coat the surface of the formed amino resin film with a low refractive index resin after the steaming.

  According to the present invention, it is possible to obtain a polyester fiber structure having a high level of deep color and excellent in washing durability and dyeing fastness. Such an effect of the present invention is particularly remarkable in enhancing the deep colorability of black.

  As a result of intensive studies on the above-mentioned problem, that is, a fiber structure having improved deep color durability and dyeing fastness of the polyester-based fiber structure, the present inventors have found that an amino resin containing silicon oxide among inorganic fine particles. It has been clarified that such a problem is solved by coating the fiber surface with a polymer.

  Examples of the polyester fiber used in the present invention include a polyester fiber containing an aromatic component and an aliphatic polyester fiber. Examples of polyester fibers containing an aromatic component include polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, or those and third components such as isophthalic acid, isophthalic acid sulfonate, adipic acid, and polyethylene glycol. can do. Examples of the aliphatic polyester fiber include poly L lactic acid, poly D lactic acid and poly D, homopolymer composed of L lactic acid, polylactic acid-glycolic acid copolymer, and the like.

  The polyester fiber used in the present invention may contain various commonly used additives in order to improve productivity and properties in the production process and processing process of the raw yarn. For example, additives such as heat stabilizers, antioxidants, light stabilizers, UV absorbers, antistatic agents, colorants, smoothing agents, plasticizers, antibacterial agents, fungicides, and deodorants are added to polyester fibers. It can be included.

  In the present invention, these polyester fibers can be used alone or in admixture of two or more, and short fibers, long fibers or these may be mixed. In addition, other fibers, for example, natural fibers such as cotton, wool and silk, and semi-synthetic fibers such as rayon and acetate can be mixed and used within a range not impairing the effects of the present invention.

  As the polyester-based fiber structure of the present invention, fabrics such as woven fabrics, knitted fabrics and nonwoven fabrics made of the polyester-based fibers, and those in the form of thread-like materials such as yarns, strings and ropes can be used. It is not limited to these.

  In the polyester fiber structure of the present invention, an amino resin film containing silicon oxide particles is formed on the surface of the polyester fiber constituting the polyester fiber structure, and the fiber surface is formed by the amino resin film. It is what is covered.

  As the amino resin used in the present invention, a known amino resin can be used, but a polymer (condensate) having a melamine compound represented by the following general formula as a monomer is particularly preferably used.

  Since the above melamine compounds have a higher refractive index than polyester fibers and tend to reduce the color developability of the polyester fiber dyed products, they are generally not used for deep color processing. It has excellent adhesiveness. In the present invention, silicon oxide is contained as inorganic fine particles in order to enhance durability by utilizing the high adhesive force with such amino resin fibers and to obtain deep color.

  The inorganic fine particles used in the present invention are preferably inorganic fine particles having a low refractive index from the technical idea of the present invention, and silicon oxide is particularly preferably used because of its low refractive index and compatibility with amino resins. . The average particle diameter of silicon oxide is preferably 10 to 500 nm, more preferably 40 to 500 nm. The larger the average particle diameter, the lower the refractive index thickness effect and the irregular reflection effect due to the formation of irregularities on the fiber surface. is there.

  The mixing ratio of the amino resin and silicon oxide varies depending on the average particle diameter of the silicon oxide, and may be determined according to the type of silicon oxide to be used. Preferably it is 5 weight part or more with respect to 100 weight part of amino resins, More preferably, it is 15-50 weight part.

  The amino resin film of the present invention is preferably in the range of 10 to 100 nm, more preferably in the range of 15 to 80 nm.

  Next, the method for forming an amino resin film containing silicon oxide according to the present invention will be described using a melamine compound. First, an aqueous liquid (dissolved or dispersed in water) in which a melamine resin monomer and silicon oxide are mixed is applied to a polyester fiber structure and then steamed.

  As a method of applying an aqueous liquid to a polyester fiber structure, after immersing the polyester fiber structure in the aqueous liquid, it is squeezed with a mangle or the like so as to obtain a desired amount of adhesion, or a knife coater or spray is used. Although the method etc. which give required amount can be employ | adopted, it is not specifically limited. The adhesion amount of the aqueous liquid is determined by the type and mixing ratio of the amino resin and silicon oxide, and cannot be generally specified, but is generally 0.5 to 5% by weight with respect to the fiber weight, more preferably 1 to 3% by weight.

  After the application of the aqueous liquid, a heat treatment is performed for the condensation polymerization, and the condensation polymerization reaction of the present invention preferably uses a catalyst. Examples of the catalyst include acetic acid, formic acid, acrylic acid, malic acid, tartaric acid, maleic acid, phthalic acid, sulfuric acid, persulfuric acid, hydrochloric acid, phosphoric acid, and the like, and ammonium salts, sodium salts, magnesium salts thereof, and the like. More than one kind of can be used. Among these, ammonium persulfate and potassium persulfate can be preferably used as the catalyst. The amount of the catalyst used is preferably 0.001 to 2% by weight based on the amount of melamine resin used.

  The heat treatment for condensation polymerization of the amino resin is preferably performed at a temperature of 50 to 180 ° C. for 0.1 to 30 minutes. Such a heat treatment can exert the effects of the present invention by either a dry heat treatment or a steam heat treatment, but the steam heat treatment makes it easier to form a uniform film on the fiber surface and the texture after the film formation is more flexible. In such steaming, saturated steam or superheated steam at 80 ° C. or higher is preferably used, more preferably saturated steam at a temperature of 90 to 130 ° C. in the case of saturated steam, and 110 to 160 in the case of superheated steam. This is superheated steam at a temperature of 0 ° C., and all of them are processed for several seconds to several minutes. After performing this steaming treatment, it is preferable to perform hot water washing or reductive washing at a temperature of 60 to 95 ° C. in order to remove unreacted amino resin and catalyst and ensure dyeing fastness.

  In the present invention, the surface of the amino resin coating is preferably further coated with a low refractive resin, and the deep color can be further enhanced by coating with the low refractive resin. The low refractive index resin used in the present invention preferably has a refractive index of 1.5 or less, such as a block of propylene oxide and ethylene oxide or a random copolymer polyether diol and hexamethylene diisocyanate or xylene diisocyanate. Urethane resin, tetrafluoroethylene / hexafluoropropylene copolymer, polypentadecafluorooctyl acrylate, fluorine compound such as polytrifluoroethyl methacrylate, vinyl ether compound such as polyvinyl isobutyl ether and polyvinyl ethyl ether, polybutyl acrylate , Acrylic ester compounds such as polymethyl acrylate, polydimethylsilane, polydimethylsiloxane, amino-modified dimethylpolysiloxane And epoxy-modified dimethylsiloxane silicone compounds such like are exemplified, and these may be used one or more.

As such a low refractive resin coating method, a fiber structure on which an amino resin film is formed is immersed in an aqueous solution or a solvent-based diluent, and is then squeezed with a mangle or the like so as to obtain a target adhesion amount. Is dried at a temperature of 100 to 150 ° C., preferably heat treated at a temperature of 160 to 190 ° C., or adsorbed on the fiber surface at a temperature of 60 to 130 ° C. while immersed in a diluent. However, it is not limited to this method.
The adhesion amount of the aqueous liquid or solvent-based diluent is preferably 0.1 to 5% by weight, more preferably 0.5 to 2.0% by weight, based on the fiber weight.

  The highly color-forming polyester fiber structure of the present invention is suitably used for general clothing such as black formal.

  Hereinafter, although the high color development polyester fiber structure of the present invention will be described in detail with reference to examples, the present invention is not limited to these examples. Moreover, the quality evaluation in an Example was implemented with the following method.

<Deep color>
L value was measured using SM color computer (made by Suga Test Instruments Co., Ltd.). The lower the value, the better the deep color.

<Washing durability>
Washing was repeated 10 times based on JIS L 0217 (103) (1995) and air-dried.

  The L value of the dried dyed fabric was measured, and the durability was judged by comparison with the L value before washing.

  A weak alkaline synthetic detergent (JIS K 337) with a 0.2% concentration adjusted to a temperature of 40 ± 2 ° C. in a washing tub of an automatic inverted spiral winding electric washing machine (having the same performance as Toshiba VH-1150). Weakly alkaline (first type) liquid 25L, put dyed cloth so that the bath ratio is 1/50, wash 5 minutes → dehydration 30 seconds → rinse 2 minutes → dehydration 30 seconds → rinse 2 minutes → dehydration 30 seconds The operation was repeated 10 times and finally air dried. The L value of the dried dyed fabric was measured, and the durability was judged by comparison with the L value before washing.

<Friction fastness>
By the method prescribed in JIS L 0849 (1996), a test at the time of dryness (fastness to dry friction) and a test at the time of wetness (fastness to wet friction) were performed, and the grade was determined using a gray scale for contamination.

<Average particle diameter of silicon oxide particles>
The measurement was performed using a “HORIBA LB-500” apparatus manufactured by HORIBA, Ltd.

(Examples 1-5, Comparative Examples 1-4)
In one type of yarn (A), a copolymer polyester containing a polyalkylene glycol-based compound as an antistatic fiber is used as a core component, polyethylene terephthalate is used as a sheath component, and the copolymer polyester is 10% of the total weight of the fiber. 80.3 dtex, 18 filament (strength 3.9 cN / dtex, elongation 41.6%) core-sheath antistatic stretched yarn was used, and 1.0% by weight of colloidal silica was added to the other yarn (B). A 90 dtex, 48 filament (strength 2.52 cN / dtex, elongation 140%) semi-stretched yarn with polyethylene terephthalate as the main component is placed, and the other yarn (B) that becomes the sheath component is drawn first. Then, a drawn yarn having a degree of elongation of 53% was subjected to relaxation heat treatment in a heater, and then subjected to turbulent flow processing with the yarn (A) and mixed to obtain a composite processed yarn. The blending conditions at this time are blending machine: AT-501 type machine manufactured by Aiki Seisakusho, yarn speed 360 m / min, heat treatment temperature condition: 180 ° C., feed rate: 2.5% of yarn (A), yarn ( B) It was 9%. The processed yarn characteristics of the obtained composite processed yarn were a fineness of 145 dtex, a strength of 1.95 cN / dtex, an elongation of 43.0%, a boiling point of 9.2%, and a yarn length difference of 8.0%. Next, the composite processed yarn was subjected to 1800 T / M additional twisting in the S and Z directions with a double twister twisting machine, and a wet heat twisting set at 80 ° C. × 40 minutes was performed. The resulting twisted yarn was woven into a double structure by arranging two S and Z alternately on the warp and weft yarns, respectively. The obtained double woven fabric was scoured, set and alkali-reduced by a conventional method, and dyed black with a disperse dye to obtain a woven fabric having an L value of 12.0. The obtained dyed fabric was treated under the following conditions, and performance was evaluated at each stage. The results are shown in Table 1.

<Amino resin / silicon oxide treatment>
Component A: Smitex Resin (registered trademark) M3 (trimethylolamine 80% concentration product, manufactured by Sumitomo Chemical Co., Ltd.) was used as an amino resin.
Component B: A silicon oxide 10% aqueous dispersion having an average particle diameter of 50 nm was used.
Component C: A silicon oxide 10% aqueous dispersion having an average particle diameter of 150 nm was used.

  As a catalyst, ammonium persulfate was added to an aqueous liquid having a resin composition in which the blending ratio of the components A, B, and C was as shown in Table 1 to a concentration of 0.2%. The dyed fabric thus obtained was dipped, squeezed with mangles so that the amount of the aqueous liquid adhered was 90% by weight, and treated for 5 minutes in a saturated steam atmosphere at a temperature of 105 ° C. Subsequently, it was washed with hot water at a temperature of 70 ° C., washed with water, dried at a temperature of 120 ° C., and heat-set at a temperature of 150 ° C.

<Low refractive resin processing>
A resin liquid having the following composition was prepared, and a cloth treated with an amino resin / silicon oxide was immersed in the resin liquid. The cloth was squeezed with mangle so that the amount of the liquid adhered was 90% by weight, and dried at a temperature of 130 ° C. Heat set at a temperature of ° C.
・ "Maxguard" (registered trademark) EC470 (Kyokin Kasei Co., Ltd., fluorine compound, refractive index 1.38) ... 4%
"Toray Silicone" (registered trademark) SM8702 (manufactured by Toray Silicone Co., Ltd., amino-modified silicone, refractive index 1.48) ... 1%
"Nicepol" (registered trademark) NF20 (manufactured by Nikka Chemical Co., Ltd., anti-static agent) ... 1%

  From Table 1, it can be seen that the high color development polyester fiber structure of the present invention has excellent deep color properties, its washing durability and dyeing fastness.

  The polyester fiber structure of the present invention has improved deep color, durability and dyeing fastness, and is used for general clothing such as black formal. In particular, it is suitable for formal garments that are dyed black and have improved black deep color.

Claims (8)

  A polyester fiber structure comprising an amino resin film containing silicon oxide formed on a surface of a polyester fiber.   The polyester fiber structure according to claim 1, wherein the amino resin is an amino resin composed of a polymer having a melamine compound as a monomer. The polyester fiber structure according to claim 1 or 2, wherein the amino resin is an amino resin composed of a polymer of a monomer represented by the following general formula.

  The polyester fiber structure according to any one of claims 1 to 3, wherein the average particle diameter of silicon oxide is in the range of 10 to 500 nm.   The polyester fiber structure according to any one of claims 1 to 4, wherein a weight mixing ratio of silicon oxide is 5 parts by weight or more with respect to 100 monomer weights.   The polyester fiber structure according to any one of claims 1 to 5, wherein the surface of the amino resin coating is further coated with a low refractive index resin.   A polyester system characterized in that an amino resin film containing silicon oxide is formed on the fiber surface by steaming after applying an aqueous solution containing an amino resin monomer, silicon oxide and a catalyst to a polyester fiber structure. A method for producing a fiber structure.   8. The method for producing a high color polyester fiber structure according to claim 7, wherein the surface of the amino resin film is further coated with a low refractive index resin after the steaming treatment.