JP2005120485A - Leathery coated fabric and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leathery coated fabric assuming various leathery appearances such as grained or nubucked appearances and to provide a method for producing the same. <P>SOLUTION: The coated fabric is obtained by coating the surface of a polyester fiber fabric having a density within the range of 0.1-0.7 g/cm<SP>3</SP>with a silicone rubber dispersion. The pickup of the silicone rubber dispersion is 3-15 wt.% based on the polyester fiber fabric. The air permeability of the coated fabric is 10-50 cc/s/cm<SP>2</SP>. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a leather-like coated fabric and a method for producing the same, and more particularly, to a leather-like coated fabric capable of exhibiting various leather-like appearances such as a silver surface tone or a nubuck tone, and a method for producing the same. It is.

  Conventionally, many studies have been made on a method for obtaining a leather-finished fabric, and a typical example thereof is a method of laminating a resin film such as a urethane resin on a fabric such as a woven or knitted fabric or a non-woven fabric (for example, JP-A-7 No. -42084, JP-A-2000-108289, etc.) or a method of impregnating a cloth with a porous urethane resin or the like (for example, JP-A-6-108365, JP-A-5-222671, etc.). .

  However, in the method of laminating a resin film, there is a problem that the obtained leather preparation fabric does not have sufficient air permeability. On the other hand, in the method of impregnating with a urethane resin or the like, a silver surface with an excellent surface design feeling. There is a problem that it is difficult to obtain a leather-finished fabric having a tone-like appearance, and a solution has been eagerly desired.

JP 7-42084 A JP 2000-108289 A JP-A-6-108365 JP-A-5-222671

  An object of the present invention is to solve the above-mentioned problems of the prior art and provide a leather-like coated fabric capable of exhibiting various leather-like appearances such as a silver surface tone or a nubuck tone, and a method for producing the same. .

  As a result of intensive studies to achieve the above-mentioned object, the present inventors have found that a desired leather preparation fabric can be obtained when a small amount of silicone rubber dispersion is coated on the surface of a low-density fabric. did.

Thus, according to the present invention, there is provided a coated fabric obtained by coating the surface of a polyester fiber fabric having a density in the range of 0.1 to 0.7 g / cm ^{3 with} a silicon rubber dispersion, A leather-like coated fabric is provided, wherein the amount of John attached is 3 to 15% by weight based on the polyester fiber fabric, and the air permeability of the coated fabric is 10 to 50 cc / sec / cm ² .

Further, according to the present invention, the silicone rubber dispersion is applied to the surface of the polyester fiber cloth having a density in the range of 0.1 to 0.7 g / cm ³ , and the adhesion amount is 3 to 3% with respect to the polyester fiber cloth. There is provided a method for producing a leather-coated fabric characterized in that the coating is performed so as to be 15% by weight.

  According to the present invention, since a leather-like coated fabric capable of exhibiting various leather-like appearances such as a silver surface tone or a nubuck tone is obtained, it can be suitably used for various garments and industrial materials. Can do.

  The polyester fiber used in the present invention is a polyester fiber having terephthalic acid or naphthalenedicarboxylic acid as a main acid component and ethylene glycol, 1,3-propanediol or tetramethylene glycol as a main glycol component, specifically Polyethylene terephthalate fiber, polybutylene terephthalate fiber, polytrimethylene terephthalate fiber, polyethylene naphthalate fiber or the like is mentioned. Among them, polyethylene terephthalate fiber is preferably exemplified.

  The single fiber fineness of the polyester fiber is preferably 0.01 to 2.0 dtex, and more preferably 0.1 to 1.0 dtex. If the single fiber degree is less than 0.01 dtex, the required wear strength physical properties may not be achieved depending on the application. On the other hand, when the single fiber fineness exceeds 2.0 dtex, the pristine touch and softness peculiar to leather may be impaired.

Further, the polyester fiber fabric used in the present invention is a polyester fiber fabric obtained by forming the polyester fiber into a cloth shape such as a woven or knitted fabric or a nonwoven fabric by a conventionally known method. The density of the polyester fiber fabric is 0.1 to 0.7 g. It is important to be in the range of / cm ³ .

  The density of the fabric means the apparent density of the fabric, and is determined from the weight per unit area and the thickness (particularly, the thickness of the raised product is a thickness measured using a projection device). Say.

When the density is less than 0.1 g / cm ³ , the required tear strength cannot be ensured. On the other hand, when the density exceeds 0.7 g / cm ³ , the softness and bulkiness characteristic of leather It will be difficult to secure.

  The fabric is preferably a woven or knitted fabric from the viewpoint of easy coating and easy adjustment of the adhesion amount of the silicone rubber dispersion.

  In the present invention, the surface of the fabric is coated with a silicone rubber dispersion so that the amount of adhesion to the polyester fiber fabric is 3 to 15% by weight.

  Here, the silicone rubber dispersion refers to dimethylpolysiloxane, methylphenylpolysiloxane, methylvinylpolysiloxane, merylphenylvinylpolysiloxane, merylfluoroalkylpolysiloxane, and the like.

  The silicon rubber dispersion coating method is not particularly limited, and a conventionally known method can be arbitrarily adopted. For example, a doctor knife coating method, a reverse coating method, or a gravure coating method is used as an application method, and coating is performed on a fabric. A method etc. are illustrated preferably.

The adhesion amount of the silicone rubber dispersion is 3 to 3 with respect to the polyester fiber fabric.
It is important to be in the range of 15% by weight.

When the adhesion amount is less than 3% by weight, a sufficient surface film cannot be formed. On the other hand, when the adhesion amount exceeds 15% by weight, the surface film is too thick to have a soft leather texture.

  In the present invention, it is preferable to emboss the polyester fiber fabric before coating the fabric with a silicone rubber dispersion. By applying such embossing, the appearance effect of texture similar to natural leather can be further emphasized, and the wear resistance of the pattern when it is given is improved, so it can be used for furniture and car seats, etc. It can also be used in applications where the required properties of physical properties are severe.

  The embossing method is not particularly limited, and a conventionally known method can be arbitrarily adopted. For example, roll embossing engraved in a leather texture is used, heated at 180 degrees, and printed at a pressure of 10 t / roll. The method of making it preferable is illustrated.

  In the present invention, if a heat treatment at 80 to 160 ° C. is applied after the silicone cloth is coated on the cloth, the surface of the silicone rubber layer does not shrink, and only the coated cloth shrinks. Therefore, it is preferable because an appearance effect such as embossing with emphasized unevenness can be imparted.

  Such heat treatment may be carried out by providing separate steps, or may be carried out simultaneously with these steps using normal finishing steps such as refining, pre-setting, dyeing, and final setting. .

  Furthermore, in the present invention, it is preferable to perform buffing using a sandpaper having a particle size of about # 100 to # 1200 on the coated fabric coated with the silicone rubber dispersion. By performing such buffing, it is possible to obtain a nubuck-like fabric that exhibits a short-hair appearance and a touch of feathers.

  The buffing method is not limited to a method using sandpaper, and for example, a method of lightly raising a surface using a hydraulic needle cloth raising may be used.

It is important that the air permeability of the coated fabric thus obtained is in the range of 10 to 50 cc / sec / cm ² . When the air permeability is less than 10 cc / sec / cm ² , the texture is resin-like and a hard and soft leather texture cannot be achieved. On the other hand, when the air permeability exceeds 50 cc / sec / cm ² , it is different from napping. There will be no appearance texture.

Hereinafter, an example is given and the composition and effect of the present invention are explained in detail. In addition, each physical property in an Example is calculated | required by the following method.
(1) Air permeability Based on JIS L1096-90, it measured on condition of A method.
(2) Light resistance Based on JIS L 0842, the light resistance change after irradiating with a carbon arc lamp for 400 hours was evaluated.

[Example 1]
100 dtex / 144 composed of polyethylene terephthalate filament yarn filaments, after brushed tricot knitted fabric density 0.22 g / cm ³ (the basis weight 400 g / ^{m 2),} and the pile length and 1.8 mm, the following composition The coated knitted fabric with 7.5% by weight (30 g / m ² ) of silicon rubber adhered to the knitted fabric was obtained by direct coating with a doctor knife.
(Resin formulation)
DY38 (Toray Dow Silicone, silicone rubber dispersion) 100 parts Toluene 66 parts SRX212 (Toray Dow Corning cross-linking agent) 0.7 parts

  When the coated knitted fabric was dyed by a conventional method, a coated knitted fabric of a silver surface leather tone having a soft texture and a textured appearance similar to natural leather was obtained.

The coating knitted fabric had an air permeability of 18 cc / sec / cm ² and light resistance of grade 4.

[Example 2]
After raising a satin woven fabric having a density of 0.41 g / cm ³ (weight per unit: 250 g / m ² ) composed of a polyethylene terephthalate filament yarn of 50 dtex / 144 filaments and setting the raised length to 0.6 mm, Example 1 and Using a resin of the same formulation, direct coating with a doctor knife was performed to obtain a coated fabric in which silicon rubber was adhered to 8.0% by weight (20 g / m ² ).

  The coated fabric was dyed at 100 ° C. for 60 minutes using an airflow dyeing machine. As a result, a coated leather fabric having a soft texture and a grainy appearance similar to natural leather was obtained.

The coated fabric had an air permeability of 18 cc / sec / cm ² and light resistance of grade 4.

[Comparative Example 1]
In Example 2, it carried out similarly to Example 2 except not raising the satin fabric. The density of the satin fabric was 1.25 g / cm ³ , and the amount of silicon rubber deposited on the resulting coated fabric was 8.0% by weight.

The coated woven fabric had a hard texture and did not develop a wrinkled appearance. The coated fabric had an air permeability of 6 cc / sec / cm ² and light resistance of 4th grade.

[Example 3]
In Example 1, the tricot knitted fabric after raising was subjected to embossing with a texture pattern under conditions of a temperature of 180 ° C. and a pressure of 10 tons. The density of the tricot knitted fabric was 0.22 g / cm ³ , and the amount of silicon rubber deposited on the resulting coated knitted fabric was 7.5% by weight.

  Furthermore, when the coated knitted fabric was buffed using sandpaper with a grain size of # 400, a nubuck-like leather-like coated knitted fabric with a soft texture and a textured appearance similar to natural leather was obtained. It was.

The coating knitted fabric had an air permeability of 45 cc / sec / cm ² and light resistance of grade 4.

  According to the present invention, since a leather-like coated fabric capable of exhibiting various leather-like appearances such as a silver surface tone or a nubuck tone is obtained, it can be suitably used for various garments and industrial materials. Can do.

Claims (8)

A coating fabric obtained by coating a surface of a polyester fiber fabric having a density in the range of 0.1 to 0.7 g / cm ³ with a silicon rubber dispersion, and the amount of the silicon rubber dispersion adhered is a polyester fiber. A leather-like coated fabric characterized by being 3 to 15% by weight based on the fabric, and the air permeability of the coated fabric is 10 to 50 cc / sec / cm ² .   The leather-coated fabric according to claim 1, wherein the polyester fiber fabric is embossed.   The leather-coated fabric according to claim 1, wherein the coating fabric is buffed.   The leather-coated fabric according to claim 1, 2 or 3, wherein the fabric is a woven or knitted fabric. A silicone rubber dispersion is coated on the surface of a polyester fiber cloth having a density in the range of 0.1 to 0.7 g / cm ³ so that the amount of adhesion is 3 to 15% by weight with respect to the polyester fiber cloth. A method for producing a leather-like coated fabric.   The method for producing a leather-like coated fabric according to claim 5, wherein a heat treatment at 80 to 160 ° C is further applied to the coated fabric.   The method for producing a leather-like coated fabric according to claim 5, wherein the polyester fiber fabric is embossed before coating the silicone rubber dispersion.   The method for producing a leather-like coated fabric according to claim 5, further comprising buffing the coated fabric.