JPS6131235B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a suede tailored blanket that has raised naps made of ultrafine fibers and is water repellent. Conventionally, nonwoven fabrics with raised naps made of ultrafine fibers,
BACKGROUND OF THE INVENTION A method for producing a suede tailored fabric by applying an elastic polymer such as polyurethane to a raised fabric such as a woven fabric or a knitted fabric is known. Methods for applying the elastic polymer include immersing the raised fabric in an elastic polymer solution or emulsion and then squeezing the liquid (impregnation method), and coating the front or back side of the raised fabric with an elastic polymer solution or emulsion. A method (coating method or back coating method) is known. However, in the case of the impregnation method, since the elastic polymer is uniformly applied to the raised fabric, the color fastness (especially the fastness to rubbing) of the raised fabric may decrease, or the raised fabric has naps made of ultra-fine fibers. The disadvantage is that the writing effect, which is a characteristic of , is impaired. In the case of the coating method, the elastic polymer tends to be unevenly distributed on the surface of the raised fabric, so the above-mentioned drawbacks become even more pronounced. In the case of the back coating method, that is, a method in which coating is applied from the back side of the napped fabric (the non-napped side or the side with a low napped level), the elastic polymer tends to be unevenly distributed on the back side of the napped fabric, so the above-mentioned drawbacks may vary depending on the extent. Although it will be reduced, there is a problem that cannot be completely resolved. The inventors of the present invention have conducted intensive research to produce a suede tailored blanket that is free from the above-mentioned drawbacks and has water repellency. The inventors have discovered that the drawbacks of known techniques can be overcome by adding a water-repellent resin to the raised fabric, and have thus arrived at the present invention. That is, in the present invention, the single fiber denier is from 0.0001 to
0.8, the raised fabric has a water repellent resin of 0.1 to 7.5% solids based on the weight of the raised fabric, and This is a water-repellent suede fabric characterized in that the back side is coated with an elastic polymer having a solid content of 0.1 to 10% based on the weight of the fabric. The single fiber denier used in the present invention is
The ultrafine fiber in the range of 0.001 to 0.8 may be any known type. Examples include ultrafine fibers obtained by known superdraw or high-speed spinning methods, sea-island type or mixed-spun type composite fibers made of two different polymers, which are produced after fabric formation. Ultrafine fibers obtained by dissolving and removing sea components, multi-layer laminated composite fibers made of two different polymers, which are divided into each polymer component by mechanical action after fabric formation. by exfoliating, or
There are ultrafine fibers obtained by dissolving and removing one of the polymer components. As the ultrafine fiber-forming polymer, particularly preferred are polyesters such as polyethylene terephthalate, polyamides such as nylon 6 and nylon 66, and synthetic polymers such as polyacrylonitrile. The denier of ultrafine fibers is 0.0001~
8, preferably 0.001 to 0.5, more preferably 0.01
~0.5. If the denier is less than 0.0001, the surface abrasion and anti-pilling properties of the raised fabric will be poor, and if the denier is greater than 0.8, the texture of the raised fabric will be rough and it will not be possible to obtain a suede-like texture. Non-conformity. In the present invention, the term "fabric" refers to a nonwoven fabric, a woven fabric, a knitted fabric, or a combination thereof, and refers to a fabric having napped fabrics made of ultrafine fibers on the surface of the napped fabric. The raised fabric of the present invention is made by using the ultrafine fibers alone or in combination with other polyester fibers, polyamide fibers, polyacrylonitrile fibers, etc. of normal thickness (greater than 1 denier). For example, if a non-woven fabric is created using the above-mentioned ultra-fine fiber staples by a known method, the raised fabric (non-woven fabric) of the present invention can be directly obtained. When using the aforementioned ultrafine fiber staples by treatment with a coalescing solvent,
The raised fabric (nonwoven fabric) of the present invention can be obtained by raising or buffing the surface of the nonwoven fabric.
A spun yarn consisting of fibers of normal thickness, with the spun yarn or multifilament yarn of the ultrafine fibers as the weft,
If a satin fabric is created using multifilament yarn or crimped yarn as warp yarn, and the surface of the fabric is raised (in some cases, in combination with a step of dissolving and removing the sea component polymer), a raised fabric can be obtained. . Further, by creating a double-weft fabric with satin texture on both sides and raising the fabric on both sides, a double-sided napped fabric can be obtained. A warp knitted fabric is created by using a spun yarn or multifilament yarn of ultra-fine fibers as the front yarn and a spun yarn, multifilament yarn, or crimped yarn made of fibers of normal thickness as the back yarn. If the fabric is raised, a raised knitted fabric can be obtained. In the present invention, the raised fabric obtained as described above is then generally dyed or printed by a conventional method, and further subjected to a shearing operation and/or brushing operation as required. In the present invention, a water-repellent resin is first applied to a dyed or printed raised fabric. As the water-repellent resin, silicone resins such as methyl-hydrodiene-polysiloxane and dimethyl-polysiloxane, and fluororesins such as chloroalkyl ester of polyacrylic acid are preferred. These resins are used as emulsions or solutions in organic solvents, and are applied to raised fabrics by impregnation, coating, spraying, or the like. The amount of water-repellent resin applied (solid content) is 0.1 to 7.5% by weight based on the weight of the raised fabric.
is within the range of The raised fabric to which the water-repellent resin has been applied is transferred to the next step of coating with an elastic polymer either as it is or after drying. Elastic polymers used in the present invention include natural rubber, acrylonitrile-butadiene copolymer, polychloroprene, styrene-butadiene copolymer, polybutadiene, polyisoprene, ethylene-propylene copolymer, acrylate type copolymer, There are synthetic elastic polymers such as silicone, polyurethane, polyacrylate, polyvinyl acetate, polyvinyl chloride, polyester-polyether block copolymer, and ethylene-vinyl acetate copolymer. Further, in the present invention, prepolymers of elastic polymers can also be preferably used and are included within the scope of the present invention. For example, after coating a raised fabric with a polyurethane prepolymer, the fabric may be heat treated to form polyurethane in the fabric. In the present invention,
Particularly preferred are polyurethanes or prepolymers thereof. In the present invention, the elastomer is applied in the form of an organic solvent solution or emulsion to the back side (non-napped side or side with less napped) of the napped fabric using a coating machine such as a gravure roll, knife over roll, or reverse roll. Coached by. The elastic polymer is usually used as an organic solvent solution or emulsion with a concentration of 0.1 to 30% by weight. The elastic polymer coated on the back side of the raised fabric is then solidified or coagulated by a known dry method or wet method. If a polyurethane prepolymer is used, the coated raised fabric will be
Dry at a temperature of ~120℃ for 1-15 minutes, then dry at a temperature of ~100℃.
Polyurethane is formed in the raised fabric by heat treatment at a temperature of 180°C for 10 seconds to 15 minutes.
The amount of elastic polymer applied (solid content) is preferably 0.1 to 10% by weight, and 0.5 to 5% by weight based on the weight of the raised fabric.
% by weight is particularly preferred. The front and/or back surfaces of the raised fabric, ie, the suede fabric, to which the elastic polymer obtained as described above has been applied are then buffed or brushed by a conventional method, if necessary. If necessary, further shearing and decatizing operations are performed. In addition, in the present invention, antifouling, antifouling,
It is also possible to perform treatments such as antistatic, flexible, slimy, and flame retardant. The suede tailored blanket obtained by the present invention is
It has excellent water repellency and a feel similar to natural suede, and not only has excellent rebound and wrinkle resistance, but also has excellent lighting effects and excellent color fastness (especially fastness to rubbing). . Therefore, the suede tailored blanket obtained by the present invention can be used, for example, in jackets, jumpers, blazers, etc.
It is widely used in clothing such as skirts, pants, shorts, slacks, dresses, suits, shorts, coats, and gloves, as well as in bags, boots, chair covers, etc. Examples of the present invention are shown below, but the present invention is not limited to these Examples. Note that % and parts in the examples are based on weight unless otherwise specified. Example 1 [Manufacture of a napped fabric made of ultrafine fibers with napped fabric] According to the method disclosed in JP-A-54-42421,
32 constituent parts consisting of polyethylene terephthalate and polystyrene are arranged adjacent to each other in a ring shape, and extend in the longitudinal direction of the fibers to form a tubular body as a whole, with a weight ratio of polyethylene terephthalate and polystyrene of 70:30. Thus, a hollow annular composite fiber having a thickness of 2.1 denier was produced, while the denier of each polyethylene terephthalate component was 0.09. As the weft, a single-twisted yarn made by twisting the multifilament yarn (190 denier/90 filament) of this hollow annular composite fiber at S250T/m was used as the weft, and as the warp, a woolly yarn (75 denier/24 filament) of polyethylene terephthalate was used. A 5-ply satin-weft double weave fabric was prepared using a fabric with a twist count of S200T/m. The resulting fabric was first relaxed in a hot water bath at 98°C for 30 minutes and then dried at 120°C for 3 minutes. Next, the fabric was washed five times with trichlorethylene to dissolve and remove substantially all of the polystyrene in the hollow annular composite fibers. After that, the fabric is dried, an oil agent mainly composed of mineral oil is applied, and a needle cloth raising machine is used to
20 times on the front side of the fabric and on the back side at a speed of meters/min.
The fabric was raised 10 times to create a double-sided raised fabric with raised features made of ultrafine fibers (0.09 denier). The obtained double-sided raised fabric was preheated at 170°C for 30 seconds using a pin tenter type heat setter, and then treated with Duranol Blue G (CI No.
Contains 4% (based on the weight of the fabric) (based on the weight of the fabric) of 63305 (Trade name of ICI disperse dye), 0.2 ml/l of acetic acid and 1 g/l of a dispersant whose main component is a condensation product of naphthalene sulfonic acid and formaldehyde. Staining was carried out at 130° C. for 60 minutes in an aqueous dye bath. The fabric was then soaped with an aqueous solution of a non-ionic detergent at 80°C for 20 minutes and dried at 120°C for 3 minutes. [Production of urethane prepolymer] 21 parts of block copolymerized polyether diol with a number average molecular weight of 2400, obtained by adding ethylene oxaide to polypropylene glycol with a number average molecular weight of about 1200, adipic acid, 1,6- A mixture of 56 parts of polyester diol, 3 parts of 1,6-hexanediol, and 20 parts of hexamethylene diisocyanate, obtained by reacting hexanediol and neopentyl glycol at a molar ratio of 10:7:4, was An elethane prepolymer having free isocyanate groups was produced by reacting at ~105° C. for 1 hour under an accumulating gas stream. The content of free isocyanate groups in the obtained urethane prepolymer was 5.02%, and the content of oxyethylene chains was 10.2%.
It was %. The obtained urethane prepolymer was cooled to 40°C and diluted with 20 parts of dioxane. Then, 65 parts of a 25% aqueous solution of sodium bisulfite was added to the diluted urethane prepolymer for 30 minutes at 40°C.
Stir thoroughly for minutes. After that, 202 parts of water was added to the reaction system, and the concentration was about 30
% urethane prepolymer emulsion was obtained. [Manufacture of water-repellent suede-like napped fabric] The dyed double-sided napped fabric was treated with an emulsion of a fluorine-based water repellent at the concentration shown in Table 1 (trade name: Asahi Guard AG-730, manufactured by Asahi Glass). ) and squeeze the liquid until the pick-up becomes 75%.
It was dried at 120°C for 3 minutes. Next, a 3.8% emulsion of the urethane prepolymer obtained as described above (containing 3% dibutyltin dilaurate crosslinking catalyst with respect to the prepolymer) was applied to the double-sided napped fabric using a 45-mesh gravure roll. The back side (10 times raised side) was coated so that the coating amount (dry weight) was 1.5% of the fabric.
After that, the napped fabric was dried at 120℃ for 3 minutes, and then dried at 150℃.
heat-treated for 30 seconds, then the applied surface of the napped fabric was
Buffing was performed once on a roller sander with 100 mesh sandpaper. The properties of the double-sided nap fabric obtained are shown in Table 1.

【table】

[Manufacture of napped fabric with napped fabric made of ultra-fine fibers]

According to the method disclosed in Japanese Patent Publication No. 53-10169,
16 constituent parts made of polyethylene terephthalate and poly ε-caproamide (nylon 6) are arranged adjacent to each other in a ring shape, and stretch in the longitudinal direction of the fibers to form a tubular body as a whole. A hollow annular composite fiber having a length of 0.23 denier and a thickness of 3.75 denier was produced. As the weft, we used a single-twisted yarn made by twisting this hollow annular composite fiber multifilament yarn (300 denier/80 filaments) at S150T/m, and as the warp, we used polyethylene terephthalate woolly yarn (100 denier/24 filaments). ) to
A woven fabric with a 3/1 torn diagonal pattern was created using single-twisted yarn twisted at S200T/m. The resulting fabric was first relaxed in a hot water bath at 98°C for 30 minutes and then dried at 120°C for 3 minutes. After applying an oil agent mainly composed of mineral oil, one side of the fabric is coated with a cloth raising machine at a speed of 30 meters/minute.
The cloth was brushed 20 times and then heat set at 170° C. for 30 seconds using a pin teletor type heat setter. Thereafter, the obtained one-sided napped fabric was mixed with 4% (based on the fabric weight) of Duranol Pur-G (CI No. 63305, a trademark name of a disperse dye manufactured by ICI), 0.2 ml/l of acetic acid, and naphthalene sulfonic acid. 1 dispersant whose main component is a condensate of formamide
Dyeing was carried out at 130° C. for 60 minutes in an aqueous dyebath containing g/l. The fabric is then treated with an aqueous solution of non-ionic detergent.
Soaped at 80°C for 20 minutes and dried at 120°C for 3 minutes. [Production of water-repellent suede-like napped fabric] A dyed single-sided napped fabric was immersed in a 5% emulsion of the same fluorine-based water repellent as in Example 1, and the liquid was squeezed until the pick-up was 75%. 3 at 120℃
Dry for a minute. Next, a 3.1% emulsion of the urethane prepolymer obtained in Example 1 was applied to the back side (non-napped side) of the napped fabric using a 45-mesh gravure roll so that the amount (dry weight) of the 3.1% emulsion was 1.25% based on the fabric. I coded it so that After that, the napped fabric was dried at 120℃ for 3 minutes, and then dried at 150℃.
After heat treatment for 30 seconds, the front and back sides of the napped fabric were each buffed once using a roller sander with 100 meshes of sandpaper. The obtained single-sided napped fabric had excellent water repellency, very good writing effect and repellency, and the color fastness to rubbing was 4th to 5th grade. Example 4 The dyed single-sided napped fabric obtained in Example 3 was immersed in the 5% emulsion of the fluorine-based water repellent of Example 1, squeezed until the pick-up was 75%, and then heated at 120°C. Dry for 3 minutes. Next, a 3% emulsion of polyurethane (a reaction product of methylene-diphenyl-diisocyanate, polyethylene glycol, and 1,4-butanediol) was applied to the back side (non-napped side) of this single-sided napped fabric using a 45-mesh gravure roll. The coating was applied so that the coating amount (dry weight) was 1.2% based on the fabric. After that, the napped fabric was dried at 120℃ for 3 minutes and buffed once on each side. As a result, a suede-like napped fabric with excellent water repellency, excellent writing effect, and a level 4 color fastness to rubbing was obtained. Obtained. The repellency of this product was slightly inferior to that of Example 3. For comparison, a suede-like napped fabric was obtained in exactly the same manner as described above, except that the single-sided napped fabric was impregnated with a 1.6% polyurethane emulsion (75% pick-up) instead of coating. This product exhibited only a slight lighting effect, and the color fastness to rubbing was low at grade 2-3. Example 5 Single-twisted yarn (S120T/m) of multifilament yarn (75 denier/20 filaments) of the hollow annular composite fiber produced in Example 3 was used as the front system.
polyethylene terephthalate multifilament yarn (30 denier/12
A tricot with a weight of 120 g/m ² was knitted using filament. The obtained knitted fabric was raised and dyed in the same manner as in Example 3, and dyed to create a dyed single-sided napped knitted fabric. This one-sided raised knitted fabric was immersed in a 4% emulsion of a silicone water repellent (Poron MR, manufactured by Shin-Etsu Chemical Co., Ltd.), squeezed until the pick-up was 70%, and then dried at 120°C for 3 minutes. Thereafter, in the same manner as in Example 3, urethane polymer coating, drying/heat treatment, and buffing were performed to produce a suede-like napped knitted fabric. This product had excellent water repellency, very good writing effect and repellency, and the dyeing color fastness to rub was grade 4 to 5.

Claims (1)

[Scope of Claims] 1. A raised fabric having a raised fabric made of ultrafine fibers with a single fiber denier in the range of 0.0001 to 0.8, the raised fabric having a repellent content of 0.1 to 7.5% in solid content based on its weight. Water-repellent suede-like napping characterized by being coated with a water-based resin and an elastic polymer having a solid content of 0.1 to 10% based on the weight on the back side of the napping fabric. fabric. 2. The water-repellent suede fabric according to claim 1, wherein the water-repellent resin is a fluorine-based water-repellent resin. 3. Claim 1, wherein the elastic polymer is a polyurethane-based elastic polymer or a prepolymer thereof.
A suede tailored blanket having water repellency as described in 2.