JPS5927431B2 - Manufacturing method of suede tailored blanket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a napped fabric having naps made of ultrafine fibers.
The present invention relates to a method for producing suede tailored blankets comprising the application of an elastic polymer.

BACKGROUND ART Conventionally, there is a known method for producing a suede fabric by adding an elastic polymer such as polyurethane to a napped fabric such as a nonwoven fabric, a woven fabric, or a knitted fabric having a napped fabric made of ultrafine fibers.

Methods for applying the elastic polymer include a method in which the raised fabric is immersed in an elastic polymer solution or emulsion and then squeezed (impregnation method), and a method in which the front or back surface of the raised fabric is coated with an elastic polymer solution or emulsion. There are known methods such as coating method or back coating method.

However, in the case of the impregnation method, since the elastic polymer is uniformly applied to the raised fabric, the color fastness of the raised fabric (
In particular, there are drawbacks such as a decrease in color fastness to rubbing) and loss of the writing effect, which is a characteristic of a napped fabric having naps made of ultrafine fibers.

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 drawback becomes even more noticeable.

In the case of the back coating method, that is, the method of coating from the back side of the napped fabric (the non-napped side or the side with a small amount of napped), the elastic polymer tends to be unevenly distributed on the back side of the napped fabric, so the above drawbacks are There are some problems that cannot be completely resolved.

As a result of intensive research to produce suede prepared blankets free from the above-mentioned drawbacks, the inventors of the present invention discovered that a water-repellent resin was applied to the raised fabrics prior to applying an elastic polymer to the back side of the raised fabrics by a coating method. The present invention was achieved based on the finding that the drawbacks of known techniques can be overcome by adding the above.

That is, in the present invention, the single fiber denier is 0.0001 to 0.000.
In the method for producing a suede fabric, in which an elastic polymer is applied to a napped fabric having a napped fabric made of ultrafine fibers in the range of 8, a water-repellent resin is applied to the napped fabric prior to applying the elastic polymer, and then This is a method for producing a suede tailored fabric characterized by applying an elastic polymer to the back side of the raised fabric by a coating method.

Single fiber denier used in the present invention is 0.00
The ultrafine fiber in the range of 0.01 to 0.8 may be any known type.

Examples include: (1) ultrafine fibers obtained by known superdraw or high-speed spinning methods, (2) 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 separated and peeled into each polymer component by mechanical action after fabric formation. Alternatively, there are ultrafine fibers obtained by dissolving and removing one of the polymer components.

Polymers for forming ultrafine fibers include polyesters such as polyethylene terephthalate, nylon 6 and nylon 66.
Synthetic polymers such as polyamides, polyacrylonitrile and the like are particularly preferred.

The denier of the ultrafine fibers is 0.0001 to 8, preferably 0.001 to 0.6, more preferably 0.01 to 0.5.
It is.

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, with a suede-like texture. It is inappropriate because it cannot be obtained.

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 using the above-mentioned ultrafine fibers alone or in combination with other conventional polyester fibers, polyamide fibers, polyacrylonitrile fibers, etc. having a thickness of less than 1 denier.

For example, if a non-woven fabric is made by a known method using the ultra-fine fiber staples described in (1) above, the raised fabric (non-woven fabric) of the present invention can be directly obtained. By treating the component polymer with a solvent, when using the ultrafine fiber staple described in (1) above, the raised fabric (nonwoven fabric) of the present invention can be obtained by raising or buffing the surface of the nonwoven fabric.

If a satin fabric is created using the spun yarn or multifilament yarn of the ultrafine fibers as the weft and the spun yarn, multifilament yarn, or crimped yarn made of fibers of normal thickness as the warp, and the surface of the fabric is raised ( Depending on the case, a step of dissolving and removing the sea component polymer may be combined) to obtain a napped fabric.

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 using a spun yarn or multifilament yarn made 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, and the surface of the knitted fabric is raised. A napped knitted fabric is obtained.

In the present invention, the raised fabric obtained as described above is
Thereafter, it is generally dyed or printed by a conventional method, and further sheared and/or brushed as necessary.

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 fluoroalkyl 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 in the range of o, i to 5% by weight based on the weight of the raised fabric.

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, polyurethane or its prepolymer is particularly preferred.

In the present invention, the elastic polymer is applied in the form of an organic solvent solution or emulsion to the back side (non-napped side or side with a small amount of napped) of the napped fabric using a coating machine such as a gravure roll, knife over roll, or reverse roll. coated with.

The elastic polymer is usually used as a solution or emulsion in an organic solvent at 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.

When a polyurethane prepolymer is used, the coated raised fabric is heated at a temperature of 60 to 120°C.
Dry for 15 minutes, then dry at a temperature of 100-180°C for 10 minutes.
Polyurethane is formed in the raised fabric by heat treatment for seconds to 15 minutes.

The applied amount (solid content) of the elastic polymer is preferably 0.1 to 10% by weight, particularly preferably 0.5 to 5% by weight, based on the weight of the raised fabric.6 The elastic polymer obtained as described above The front and/or back sides of the raised fabric, that is, the suede fabric, which has been provided with the above-mentioned suede are then buffed or brushed by a conventional method as required.

If necessary, further shearing and decatizing operations are performed.

Furthermore, in the present invention, treatments such as antifouling, antistatic, flexibility, sliminess, and flame retardancy are performed at the same time or before or after applying the water-repellent resin, or at the same time or before or after applying the elastic polymer. It is also possible.

The suede tailored blanket obtained by the present invention not only has a feel similar to natural suede, has excellent rebound and wrinkle resistance, but also has excellent lighting effects and excellent color fastness (especially against abrasion). fastness).

Therefore, the suede tailored blanket obtained by the present invention can be used, for example, in jackets, jumpers, blazers, skirts, pants, shorts, Norax, dresses, suits, etc.
It has a wide range of uses, including clothing such as vests, coats, and gloves, as well as bags, boots, and chair covers.

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 made of polyethylene terephthalate and polystyrene were arranged adjacent to each other in a ring shape, The fibers extend in the longitudinal direction to form a tubular body as a whole, and the weight ratio of polyethylene terephthalate and polystyrene is 70:30, and the thickness of each polyethylene terephthalate component is 0.09. 2.
A 1-tenier hollow annular composite fiber was produced.

As the weft, this hollow annular composite fiber multifilament yarn (190 denier/90 filament) is used with 825
A single-twisted yarn with a twist of 0T/rn is used as the warp.
75 denier/24 filament woolly yarn (false twist) of polyethylene terephthalate, with a twist number of S 2
00 T/m was used to create a 5-ply satin weft double weave fabric.

The obtained fabric was first fluxed in a hot water bath at 98°C for 300 minutes and 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 the front side of the fabric is raised 20 times and the back side 10 times using a needle cloth raising machine at a speed of 30 meters/minute. 0,
A double-sided napped fabric with napped material (09 denier) was prepared.

The obtained double-sided raised fabric was preheated at 170°C for 30 seconds using a pin tenter type heat setter, and then
Teyranol Blue G (C, 1, 63305.1.C
, 1, 4% (based on the weight of the fabric) of 4% (based on the weight of the fabric), 0.2 ml/73 of acetic acid, and 11/l of a dispersant whose main component is a condensation product of naphthalene sulfonic acid and formaldehyde. Dyeing was carried out for 60 minutes at 130° C. in an aqueous dye bath containing

The fabric was then washed in an aqueous solution of a non-ionic detergent for 2 hours at 80°C.
It was soaped for 0 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 2,400 obtained by adding ethylene oxide to polypropylene glycol with a number average molecular weight of about 1,200, ■ Adipic acid, 1,6-hexanediol, and neopentyl glycol. A mixture of 56 parts of polyester diol, 3 parts of 1,6-hexanediol, and 20 parts of hexamethylene diisocyanate obtained by reacting Recall at a molar ratio of 10:4 was mixed with 10 parts of hexamethylene diisocyanate.
The reaction was carried out at 0 to 105° C. for 1 hour under a nitrogen stream to produce a urethane prepolymer having free incyanate groups.

The content of free incyanate groups in the obtained urethane prepolymer was 5.02%, and the content of oxyethylene chains was 1.
It was 0.2%.

The obtained urethane prepolymer was cooled to 40°C,
20 parts of dioxane was added to dilute.

Then, 65 parts of a 25% aqueous solution of sodium bisulfite was added to the diluted urethane prepolymer, and the mixture was thoroughly stirred at 40° C. for 30 minutes.

Thereafter, 202 parts of water was added to the reaction system to obtain an emulsion of urethane prepolymer with a concentration of 30%.

[Manufacture of suede-like napped fabric] - The dyed double-sided napped fabric is 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 Co., Ltd.) After squeezing the liquid until the pick-up was 75%, it was dried at 120° C. for 3 minutes.

Next, a 38% emulsion of the urethane prepolymer obtained as described above (containing 3% of dibutyltin dilaurate crosslinking catalyst based on the prepolymer) was applied to the double-sided raised fabric using a 45-mesh gravure roll. The back side (10 times raised side) was coated in an amount (dry weight) of 1.5% of the fabric.

Thereafter, the napped fabric was dried at 120°C for 3 minutes, and then dried at 150°C.
heat treatment for 30 seconds, and then heat-treated the applied surface of the napped fabric for 10 seconds.
Buffed once with a roller sander with 0 mesh sandpaper.

The properties of the double-sided nap fabric obtained are shown in Table 1.

As is clear from Table 1, when the water-repellent resin was applied prior to applying the urethane prepolymer (elastic resin) (experiment numbers 2 to 5), the elastic resin did not adhere to the naps on the surface, so A suede-like woolen fabric with excellent lighting effects and excellent color fastness to rubbing was obtained.

If the amount of water repellent applied is too large, it is inappropriate because it becomes difficult to coat the elastic resin.

Example 2 The dyed double-sided napped fabric obtained in Example 1 was immersed in the 1% emulsion of the fluorine-based water repellent of Example 1, squeezed until the pick-up was 75%, and then heated at 120°C for 3 hours. Dry for a minute.

Next, 1.2% ethylene-vinyl acetate copolymer (equimolar copolymer), 0.9%
2.4% of a mixture of polybutyl acrylate and 0.3% polyester-polyether block copolymer
The aqueous emulsion was coated using a 45-mesh gravure roll so that the coating amount (dry weight) was 1.2% based on the fabric.

After that, when the napped fabric was dried at 120°C for 3 minutes,
A suede-like napped fabric with excellent lighting effects, repellency, and color fastness to rubbing was obtained.

Example 3 [Manufacture of a napped fabric made of ultrafine fibers] Polyethylene terephthalate and poly-ε-caproamide (
16 constituent parts made of nylon 6) are arranged adjacent to each other in an annular shape, extending in the longitudinal direction of the fibers to form a tubular body as a whole, and each constituent part has a thickness of 0.23 deniers. However, a hollow annular composite fiber having a thickness of 3.75 deniers was produced.

As the weft, this hollow annular composite fiber multifilament system (300 denier/80 filaments) is used with 815
A single-twisted yarn with a twist of 0 T/m was used as the warp, and a single-twisted yarn with a twist of S 200 T/m was used as the warp for woolly yarn of polyethylene terephthalate (100 denier/24 filament), with a 3/1 tear angle. Created a fabric of literary organization.

The resulting fabric was first relaxed in a hot water bath at 98°C for 30 minutes and 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.
It was raised twice and then heat set at 170° C. for 30 seconds using a pinch letter type heat setter.

Thereafter, the obtained one-sided napped fabric was mixed with 4% (based on the fabric weight) of Duranol Blue G (C01, A63305.1.C, trade name of disperse dye made by 11 companies) and 0.2 ml/l of acetic acid. Then, dyeing was carried out at 130° C. for 60 minutes in an aqueous dye bath containing 1 y'/l of a dispersing agent mainly composed of a condensate of naphthalene sulfonic acid and formamide.

The fabric was then washed in an aqueous solution of a non-ionic detergent for 2 hours at 80°C.
Soaped for 0 minutes and dried at 120°C for 3 minutes.

[Manufacture of suede wool fabric]

The dyed single-sided napped fabric was dipped in a 1% emulsion of the same fluorine-based water repellent as in Example 1, and the pickup was 75.
%, and then dried at 120° C. for 3 minutes.

Next, 3 of the urethane prepolymer obtained in Example 1
．． Apply the 1% emulsion to the back side (non-napped side) of the napped fabric using a 45-mesh gravure roll in the amount (
The coating was applied so that the dry weight) was 1.25% based on the fabric.

Thereafter, the napped fabric was dried at 120°C for 3 minutes, and then dried at 150°C.
for 30 seconds, and then the front and back sides of the napped fabric were each buffed once using a roller sander with 100 mesh sandpaper.

The obtained single-sided napped fabric had excellent lighting effects and repellency, and the color fastness to rubbing of dyeing was grade 4 to 5.

Example 4 The dyed single-sided napped fabric obtained in Example 3 was immersed in the 1% emulsion of the fluorine-based water repellent of Example 1, squeezed until the pick-up was 75%, and then heated at 120°C for 30 minutes. Dry for a minute.

Next, polyurethane (methylene-diphenyl-diisocyanate,
A 3% emulsion of polyethylene glycol and 1,4-butanediol (reaction product) was coated on the fabric using a 45-mesh gravure roll at a coating amount (dry weight) of 1.2%.

Thereafter, the napped fabric was dried at 120° C. for 3 minutes and buffed once on each side, resulting in a suede-like napped fabric with an excellent lighting effect and a dye fastness to rub of grade 4 to 5.

The repellency of this product was slightly inferior to that of Example 3.

For comparison, a suede-like napped fabric was obtained in the same manner as described above, except that the single-sided napped fabric was impregnated with a 1.6% polyurethane emulsion (pickup 75%) 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-twist yarn (S120T/rn') of hollow annular composite fiber multifilament yarn (75 denier/20 filaments) produced in Example 3 was used as the front system, and polyethylene terephthalate multifilament yarn was used as the back system. Filament yarn (30 denier/12 filament)
Using this, a tricot having a weight of 1201/m2 was knitted.

The obtained knitted fabric was raised and dyed in the same manner as in Example 3 to create a dyed single-sided raised knitted fabric.

This one-sided raised knitted fabric is coated with silicone water repellent (Poron MR1).
immersed in a 2% emulsion (manufactured by Shin-Etsu Chemical, K.),
After squeezing the liquid until the pickup was 70%, it was dried at 120° C. for 3 minutes.

Thereafter, in the same manner as in Example 3, coating with urethane prepolymer, drying/heat treatment, and buffing were performed to produce a suede-like napped knitted fabric.

This product had excellent lighting effects and repellency, and the color fastness to rubbing was grade 4 to 5.

Claims (1)

[Scope of Claims] 1. A method for producing a suede prepared fabric in which an elastic polymer is added to a napped fabric made of ultrafine fibers having a single fiber denier of o, oooi to 0.8. 1. A method for producing a suede tailored fabric, which comprises applying a water-repellent resin to a raised fabric prior to the application of coalescence, and then applying an elastic polymer from the back side of the raised fabric by a coating method. 2. The amount of water-repellent resin applied to the raised fabric is 0.1 to 5% by weight in terms of solid content based on the weight of the raised fabric.
A method for manufacturing a suede tailored blanket according to claim 1. 3. The method for producing a suede tailored blanket according to claim 1 or 2, wherein the water-repellent resin is a fluorine-based water-repellent resin. 4. The method for producing a suede tailored fabric according to claim 1, wherein the amount of the elastic polymer applied to the raised fabric is 0.1 to 10% by weight in terms of solid content based on the weight of the raised fabric. . 5. The method for producing a suede tailored blanket according to claim 1 or 4, wherein the elastic polymer is a polyurethane-based elastic polymer or a prepolymer thereof.