KR101873354B1 - Synthetic leather for seat and preperation method of the same - Google Patents

Abstract

The artificial leather for a seat according to an embodiment of the present invention includes a property imparting layer comprising any one selected from the group consisting of polyurethane, thermosetting polyurethane, polyvinyl chloride, and combinations thereof; And a support layer comprising an extensible fabric having a ratio of a tensile elongation in an oblique direction to a weft direction of 1: 0.8 to 1.5. A span fabric having a ratio of a tensile elongation in the warp direction and a warp direction of about 1: 1 is applied to the supporting layer so that the warp / weft direction warpage is imparted to the artificial leather even after the artificial leather is manufactured. Provides artificial leather.

Description

TECHNICAL FIELD [0001] The present invention relates to a synthetic leather for a seat,

The present invention relates to an artificial leather for a seat and a method for producing the same.

In recent years, as a ventilation sheet for high-end or semi-heavy car specifications, not only natural leather, but also artificial leather materials are used a lot.

Artificial leather made of thermoplastic polyurethane (TPU) or polyvinyl chloride (PVC) has the advantage of being superior in price competitiveness compared to natural leather or PU artificial leather. These artificial leather replace natural leather and polyurethane (PU) products with low price, but related products are not applied due to some technical problems in the punching product specifications of the main parts except the side parts.

If punching is applied to such artificial leather to apply artificial leather made of TPU resin or PVC resin to the ventilation sheet, the yarn is loosened at the punching area of the fabric adhered as a support on the back of the artificial leather, A technical problem such as the occurrence of lint occurs. This has been a cause of lowering the productivity and product quality of artificial leather sheets and may also limit the application of artificial leather to the central punching area of the sheet.

Conventional artificial leather products are demanded for artificial leather products having sufficient durability, cushioning, and sensibility while reducing weight while imparting appropriate thickness and cushioning properties to the sheet.

Korean Patent Laid-Open No. 10-2015-0055406, May 21, 2015, artificial leather fabric with improved lint quality and method of manufacturing the same Korean Patent Registration No. 10-1519737, published on May 12, 2015, a method of removing odor of artificial leather and artificial leather

An object of the present invention is to provide a synthetic leather for a sheet and a method for producing the same, which can increase the convenience of work, have excellent properties such as durability, resilience and cushioning feeling,

In order to achieve the above object, a synthetic leather for a sheet according to an embodiment of the present invention includes: a property-imparting layer comprising any one selected from the group consisting of polyurethane, thermosetting polyurethane, polyvinyl chloride, and combinations thereof; And a support layer comprising an extensible fabric having a ratio of a tensile elongation in an oblique direction to a weft direction of 1: 0.8 to 1.5.

The fabric may have a polyurethane content of 20 wt% or more.

The fabric may have a warp density of 60 to 90 / inch.

The fabric may have a weft density of 60 to 90 / inch.

The weft yarns may be fabricated by applying a first weft yarn and a second weft yarn, which are two different weft yarns together, and the first weft yarn and the second weft yarn may have a weft yarn density of 4: 1 to 4.

The fabric may be a flat fabric, a twill fabric, a weft fabric, a basket fabric, or a fabric of weave fabric.

The artificial leather for the sheet may have a weight of less than 850 g / m ² .

The artificial leather for the sheet may have a weight of less than 750 g / m ² and less than 850 g / m ² .

The artificial leather for the sheet may have a weight of 750 to 800 g / m ² .

The artificial leather for a seat may have a thickness of 1 to 1.3 mm.

The property imparting layer may include a foam layer contacting with the support layer and containing pores, and a surface layer positioned on the foam layer.

The foam layer may be a polyvinyl chloride-containing layer having a pore size of from 30 μm to 250 μm and a thickness of from 0.25 to 0.4 mm.

The surface layer may be a polyvinyl chloride-containing layer having a thickness of 0.15 mm to 0.25 mm.

The artificial leather for a seat may further include a surface coating layer positioned on the surface layer.

The surface coating layer may be any one selected from the group consisting of an acrylic coating layer, a urethane coating layer, and a combination thereof.

According to another embodiment of the present invention, there is provided a method of manufacturing a synthetic leather for a sheet, comprising: preparing a support layer comprising a bi-directional stretch fabric having a ratio of a tensile elongation in an oblique direction to a warp direction in a ratio of 1: 0.8 to 1.5; And applying a solution for forming a property-imparting layer on the support layer, and performing a drying process or a foaming process after drying to form a property-imparting layer.

The property imparting layer forming step may include a foam layer forming step and a surface layer forming step.

The foaming layer forming step is a step of forming a foam layer on a support layer comprising 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0 to 30 parts by weight of a filler, and 0.1 to 2 parts by weight of a foaming agent And then drying the resultant to form a foamed layer.

Wherein the surface layer forming step is a step of forming a surface layer composition comprising 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0.1 to 10 parts by weight of a heat stabilizer, and 0.01 to 1 part by weight of an ultraviolet absorber, Followed by drying to form a surface layer.

Hereinafter, the present invention will be described in more detail.

Numerical values applied with or without such expressions as the terms "about", "substantially", "relative", "relative", etc., as used in this specification, Quot; is used to mean a range close to the numerical value including " including "

In the present specification, the term "combination thereof " included in the expression of the machine form means one or more combinations or combinations selected from the group consisting of the constituents described in the expression of the machine form, ≪ / RTI > and the like.

In this specification, the singular < RTI ID = 0.0 > terms < / RTI > are to be interpreted as including the singular or plural unless context dictates otherwise.

In this specification, the description of "A and / or B" means "A, B, or A and B".

To achieve the above object, a synthetic leather for a sheet according to an embodiment of the present invention includes: a property-imparting layer comprising any one selected from the group consisting of polyurethane, thermosetting polyurethane, polyvinyl chloride, and combinations thereof; And a support layer comprising an extensible fabric having a ratio of a tensile elongation in an oblique direction to a weft direction of 1: 0.8 to 1.5.

The property imparting layer may include a foam layer and a surface layer sequentially on the support layer.

The foam layer imparts a feeling of thickness or cushion to the artificial leather, forms a layer containing pores through a foaming method, and secures basic physical properties of the artificial leather. The foam layer serves to cover the shape of the fabric layer of the support layer so as not to be exposed on the synthetic leather surface, and functions to form a feeling of volume of artificial leather by giving a feeling of thickness. In addition, when forming the embossing (embo), which imitates natural leather, on the artificial leather, the foam layer also plays a role of imparting a deep feeling of embossing.

The surface layer prevents the bubbles of the foam layer from being exposed on the surface and protects the chemical and the like properties of the foam layer.

A coating layer (surface coating layer) may be further provided on the property imparting layer. The coating layer serves to perform surface treatment and functions to impart or complement color, luster, fouling, abrasion, and chemical properties. For example, a polyacrylic coating layer, a polyurethane coating layer, or the like may be applied as the coating layer, and a polish agent, a wear-resistant agent, a pigment, etc. may be added if necessary.

The support layer serves as a support for supporting the foam layer and the surface layer, and is a layer reinforcing the physical properties of the artificial leather itself. Woven fabric, knitted fabric or the like is generally applied, but in the present invention, a fabric is applied.

As a supporting layer of artificial leather, a nonwoven fabric or a knitted fabric is generally applied.

In general, the nonwoven fabric has a relatively irregular internal structure. Due to the nature of the fabric itself, it is difficult to impart a firm texture required for the synthetic leather. Even if the elastic fibers are applied to the nonwoven fabric, the degree of tensile force differs depending on the portion of the nonwoven fabric. It has been difficult to weaken the physical properties of the polymer layer that gives the physical properties of artificial leather formed in contact therewith, or to generate wrinkles, thereby making it difficult to utilize the artificial leather for a sheet.

In addition, when a knitted fabric is applied to a supporting layer of artificial leather, there is a problem that fluff is generated in artificial leather to which processing such as punching is applied. In addition, although the knitted fabric has a certain degree of tensile elongation in one direction due to the nature of the knitted fabric, the tensile elongation in the other direction is insignificant, and there is a problem that workability of covering the artificial leather cover during the sheet assembling work is significantly reduced.

In the present invention, the fabric is used as the supporting layer, and polyurethane is contained in the yarn applied to the fabric, and the fabric itself is applied by spun fabrics.

A bi-directional stretchable fabric having a ratio of the tensile elongation in the warp direction to the warp stretch ratio of 1: 0.8 to 1.5 is applied to the support layer.

The spun fabric may have a polyurethane content of 20 wt% or more and a polyurethane content of 20 to 55 wt%, specifically 25 to 45 wt%, more specifically 30 to 40 wt%. In this case, a fabric having an appropriate strength and tensile elongation to be applied to a sheet included in a supporting layer of artificial leather can be produced.

The remainder of the spun fabric may include components applied to the yarn, and the yarn commonly used for spun fabrics may be applied. For example, polyester may be used, but the present invention is not limited thereto.

The spun fabric may be woven by applying warp and weft yarns to different fibers.

At this time, elastic fibers (elastic yarns) containing polyurethane can be applied to the inclination, and elastic yarns such as spandex and lycra are applicable.

The elastic yarn may be applied to the yarn, and the elastic yarn and the ordinary yarn may be used in combination.

The above-mentioned general yarn means fibers other than elastic yarns, synthetic fibers other than the elastic yarns, natural fibers, and mixed yarns thereof may be applied.

In order to obtain a spun fabric having a bi-directional tensile elongation in the warp direction and the warp direction, it is preferable that polyurethane is contained in both warp and weft.

Specifically, the warp yarns may include fibers having a polyurethane content of 60 to 80% by weight, and polyester yarns and nylon yarns may be applied to the remaining yarns other than the oblique polyurethane yarns.

In addition, fibers having a polyurethane content of 10 to 40% by weight may be applied to the weft yarn, and polyester yarn, nylon yarn, and the like may be applied to the remaining yarns except the polyurethane.

Only one kind of warp and weft can be applied, and two or more fibers can be applied together. For example, when two or more fibers are applied together as a weft, the first weft yarn and the second weft yarn may be alternately applied at a certain ratio.

In this case, the weft density can be applied to the first weft yarn and the second weft yarn with a weft density of 4: 1 to 4, 4: 1 to 3, and 4: 1 to 2, respectively. In this case, the span fabric can help to have an excellent stretching force with a firm texture.

The warp yarn is formed from a first weft yarn having a polyurethane content of 40 to 60% by weight (other than polyurethane, general yarn application) and a polyurethane content of 0 to 10% by weight (the content excluding the polyurethane, Application) can be used in combination.

The ramp can be formed of an inelastic synthetic fiber and a polyurethane (hereinafter abbreviated as an elastic composite), and the warp yarn can be an elastic composite of an inelastic synthetic fiber such as a plain yarn and a polyurethane or an inelastic synthetic fiber, Fiber-reinforced plain yarn and polyurethane) can be applied.

The ramp can be applied to a polyurethane single yarn of 100 to 180 denier and a polyester yarn of 50 to 80 denier, and a polyester yarn of 50 to 80 denier to a single polyurethane yarn of 50 to 90 denier And a polyester yarn of 400 to 500 denier may be used in combination. In this case, a span woven fabric having sufficient thickness and tensile elongation and giving excellent physical properties to the artificial leather for a sheet can be obtained.

The fabric may have an oblique density of 60 to 90 / inch and a weft density of 60 to 90 / inch. Specifically, the fabric may have a warp density of 70 to 78 / inch and a weft density of 70 to 78 / inch.

The span fabric can be sufficiently restored to its original position because the spun yarn is formed sufficiently at a tissue point (a point at which the weft and the warp intersect) Even when applying a punching (calamusing or laminating method) made of artificial leather, the fixing force of the weft yarn and / or the warp yarn due to the tissue point is sufficiently maintained, so that the residue does not escape or fluff is not generated.

The characteristic of the artificial leather of the present invention is that it is unnecessary to process the polyurethane impregnation process after the manufacture of artificial leather in order to prevent the occurrence of nap occurring in punching after the knitted fabric is applied as a support layer.

That is, the manufacturing process of artificial leather for punching application can be simplified, and the increase of the weight per unit area of artificial leather by separately impregnated polyurethane can be prevented as compared with the conventional method.

The spun fabrics may be fabric fabrics such as plain fabrics, twill fabrics, twill fabrics, basket fabrics, and dobby fabrics, and specifically, flat fabrics are excellent in terms of elongation balance between the width and the length.

When the flat fabric is applied to the spun fabric, the flat fabric may be applied to a so-called high-density fabric, so that a proper thickness can be secured.

In addition, a yarn applicable to the flat fabric may include 400 to 500 denier tandem yarns, and the number of yarns may be 2 to 8, so that the flat fabric has a thickness of more than a certain level, .

In this case, the surface area of contact with the property-imparting layer formed on the support layer is increased, and the interface between the support layer and the property-imparting layer has improved adhesion, so that the manufactured artificial leather for a sheet can have more rigid characteristics.

The property imparting layer formed on the spun fabric may include a foam layer and a surface layer sequentially.

The foam layer may be a polyurethane layer, a thermoplastic polyurethane layer, or a polyvinyl chloride layer. The foam layer may be formed by applying a resin composition containing a foaming agent (or a foaming agent) followed by foaming, And a thick feeling.

The foam layer may be a polyvinyl chloride-containing layer having pores having a size of 30 [mu] m to 250 [mu] m and a thickness of 0.25 to 0.4 mm.

In this case, it is possible to impart a padded texture and a thickness feeling suitable for use as artificial leather for a seat, even though the manufactured artificial leather has a low unpleasant odor.

The foam layer may be prepared by applying a composition for preparing a foam layer onto the support layer and drying the composition, and then a heat treatment process may be further performed for progressing the foaming process.

At this time, the application, drying and heat treatment can be generally applied to the methods and conditions applicable to the manufacture of artificial leather.

The composition for preparing a foamed layer includes 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0 to 30 parts by weight of a filler, and 0.1 to 2 parts by weight of a blowing agent.

Specifically, the composition for preparing a foamed layer comprises 100 parts by weight of a base resin containing polyvinyl chloride, 80 to 90 parts by weight of a plasticizer, 3 to 20 parts by weight of a filler, 0.1 to 2 parts by weight of a blowing agent, 0.1 to 10 parts by weight of a processing aid, And 0.1 to 5 parts by weight of a low heat stabilizer.

The composition for preparing a foamed layer may further comprise a flame retardant and / or a pigment as necessary. The flame retardant may be used in an amount of 1 to 50 parts by weight based on 100 parts by weight of the base resin. In the case of the pigment, 0.1 to 10 parts by weight based on 100 parts by weight of the composition.

When a composition for preparing a foamed layer is prepared in the range of such a content, a foamed layer of artificial leather which can be adhered well to the surface of the support layer and can express a padded texture required by the artificial leather after the foaming process can be produced.

The surface layer may include a polyurethane layer, a thermoplastic polyurethane layer, or a polyvinyl chloride layer. The surface layer may contain a stabilizer, a flame retardant, etc. to reinforce physical and chemical stability, and may contain pigments or the like, .

The surface layer may be a polyvinyl chloride-containing layer having a thickness of 0.15 mm to 0.25 mm.

In this case, a surface layer having a thin and sufficient durability can be formed while securing the required physical stability and the like required for the surface layer.

The surface layer may be prepared by applying a composition for the surface layer on the foam layer and then drying the composition.

At this time, the application and drying can be generally applied to the methods and conditions applicable to manufacture of artificial leather.

The composition for surface layer production may include 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0.1 to 10 parts by weight of a heat stabilizer, and 0.01 to 1 part by weight of an ultraviolet absorber.

Specifically, the composition for the surface layer comprises 100 parts by weight of a base resin, 80 to 90 parts by weight of a plasticizer, 1 to 10 parts by weight of a heat stabilizer, 0.1 to 1 part by weight of an ultraviolet absorber, 0.1 to 6 parts by weight of a processing aid, To 3 parts by weight.

The composition for the surface layer may further comprise a flame retardant and / or a pigment as needed. The flame retardant may be used in an amount of 1 to 50 parts by weight based on 100 parts by weight of the base resin, 0.1 to 10 parts by weight.

The artificial leather for a seat may further include a surface coating layer positioned on the surface layer.

The surface coating layer may be selected from the group consisting of an acrylic coating layer, a urethane coating layer, and a combination thereof.

In the artificial leather, a span fabric is applied as a support layer to improve the workability of sewing / assembling, and at the same time, obtains a physical property of weight reduction.

Compared with artificial leather applied with a polyurethane impregnation process to apply punching, it is possible to obtain a product which is reduced in weight by about 10% or more compared with artificial leather applied with a knitted fabric as a support layer.

The artificial leather for a seat has a weight of less than 850 g / m < ² > and can provide a lightweight artificial leather having reduced weight while maintaining physical characteristics.

Specifically, the artificial leather for the sheet may have a weight of 750 to 850 g / m ² , may have a weight of 750 to 810 g / m ² , and may have a weight of 750 to 800 g / m ² Lt; / RTI >

The artificial leather has a thickness of 1 to 1.3 mm and provides a synthetic leather for a seat having a thickness sufficient for application to a seat even though it is lightweight, and having a soft and cushioning feeling.

The thickness of the support layer may be 0.4 to 1.1 mm, more specifically 0.5 to 0.8 mm. A sufficient supporting effect can be obtained even with such a thin support layer.

The foam layer may have a thickness of 0.25 to 0.4 mm. In this case, the foam layer can be easily formed and sufficient physical properties of the foam layer can be obtained.

The surface layer may have a thickness of 0.15 mm to 0.25 mm, and physical properties of the surface layer can be obtained with ease while forming the surface layer.

A method of manufacturing artificial leather for a seat according to another embodiment of the present invention includes a support layer preparation step and a property imparting layer formation step.

At this time, the support layer preparation step is a step of preparing a support layer including a bidirectional stretchable fabric having a ratio of a tensile elongation in an oblique direction and a weft direction of 1: 0.8 to 1.5, and the step of forming a property- Applying a solution for forming a layer, and performing a drying process or a foaming process after drying to prepare a property-imparting layer.

At this time, each of the processes such as coating, drying, and foaming can be applied to any method applied to a synthetic leather production process for a sheet.

The property imparting layer forming step may include a foam layer forming step and a surface layer forming step.

The foaming layer forming step is a step of forming a foam layer on a support layer comprising 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0 to 30 parts by weight of a filler, and 0.1 to 2 parts by weight of a foaming agent And then drying the resultant to form a foamed layer.

Wherein the surface layer forming step is a step of forming a surface layer composition comprising 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0.1 to 10 parts by weight of a heat stabilizer, and 0.01 to 1 part by weight of an ultraviolet absorber, Followed by drying to form a surface layer.

The detailed description of the supporting layer, the property-imparting layer, the foam layer, the surface layer, the coating layer (surface coating layer), the composition for preparing the foam layer, and the composition for the surface layer will be omitted herein.

INDUSTRIAL APPLICABILITY The artificial leather for a seat of the present invention is capable of enhancing the easiness of covering work on a sheet by giving an artificial leather all the warp / weft direction elongation, and is excellent in properties such as durability, The present invention provides a synthetic leather for a lightweight sheet which can be applied as a sheet even after punching.

INDUSTRIAL APPLICABILITY The method for producing a synthetic leather for a seat of the present invention is designed so that the surface of the support layer is designed to have sufficient bending while applying a sheet provided so as to give both the warp / weft direction elongation to the support layer to improve the adhesive force and physical properties , It is possible to manufacture by applying the existing facilities, but also to improve the workability of artificial leather for a seat.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph of a fabric applied to a supporting layer in Example 1 of the present invention (photograph taken again after separation from the layer for imparting physical properties after production of synthetic leather). FIG.
2 is a scanning electron microscope (SEM) image of a section of artificial leather produced in Example 1 of the present invention.
3 is a photograph of a surface (A. top) and a back surface (bottom B.) of artificial leather (plain) of the embodiment manufactured in Example 2 of the present invention.
4 is a photograph of a surface (A. top) and a rear surface (B. bottom) of a synthetic leather (punching) of the embodiment manufactured in Example 2 of the present invention.
5 is a photograph showing a result of a Velcro test for verifying whether or not fluff of a synthetic leather (punching) produced in Example 2 of the present invention is generated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the present specification, when the percent indication is unclear as to whether it is a weight% or a volume%, it means% by weight.

Example  1. Preparation of support layer

As a backing layer, spun fabrics composed of polyurethane and polyester containing 35% by weight of polyurethane based on the weight of the total fabric and having a tensile elongation in the warp direction and the warp direction of about 1: 1 were applied.

The ramp of the span fabric contained polyurethane and polyester in amounts of 65 wt% and 35 wt%, respectively, and a polyurethane single yarn of 140 denier and a polyester yarn of 75 denier were covered.

The weft yarns of the above spun fabrics were obtained by weft yarn A and weft yarn B having a weft density of 4: 2 and weft yarns A having a density of 75 denier polyester yarn of 70 denier polyurethane yarns And weft polyester B with 450 denier.

The spun fabric was woven to have a fabric texture with an oblique density of 72 inches (see FIG. 1), and a span fabric having a thickness of 1.25 mm and a weight of 196 g / m ² was then applied as a backing layer.

Example  2. Property imparting layer ( Foam layer , Surface layer) and formation of a coating layer

The foam layer and the surface layer were each produced by applying polyvinyl chloride.

The foamed layer and the surface layer were respectively applied to the foamed layer preparation solution and the surface layer production solution combined with the foam layer composition or the surface layer composition shown in Table 1 shown below in the respective calendars to prepare the foamed resin layer and the surface resin layer respectively and then subjected to foaming and embossing treatment To obtain a post-property-imparting layer (see Fig. 3).

ingredient Mixing ratio The foam layer (PHR *) The surface layer (PHR) RESIN, PVC,
P-1300, Hanwha Chemical 100 100 Diisodecyl phthalate 84 84 Processing aid 4 3 Low temperature stabilizer One One Foam stabilizer 0.4 - Heat stabilizer One 4 UV absorber - 0.3 Azodicarbonamide One - Filler 10 - Not pigment 4.4 - Upper pigment - 8.532 Flame-retardant agent 24.44 - Upper Flame Retardant - 2.64 total 230.24 203.47

* PHR stands for parts per (base) resin and represents the weight of each component for 100 parts by weight of (basic) resin.

The coating layer (surface coating layer) was subjected to surface treatment by forming an acrylic coating layer by a primary surface treatment and a urethane coating layer by a secondary coating and a tertiary coating layer. The composition of the acrylic coating layer and the urethane coating layer applied in this case was applied to a synthetic leather for a sheet.

Example  3: Evaluation of artificial leather properties

1) Evaluation of thickness and weight of each layer

Artificial leather was produced in the same manner as in Example 2, except that the sample prepared in Example 2 and the knitted fabric of 150 denier were used as support layers, and the thickness and weight of each layer were evaluated in Comparative Example 1, 2 (see photographs of one section of the sample of Example 1 in Fig. 2).

division Thickness (mm) Weight (g / m ² ) Example Comparative Example 1 Example Comparative Example 1 Surface treatment layer 0.01 0.01 16 18 Surface layer 0.20 0.2 194 301 Foam layer 0.30 0.32 291 456 Support layer 0.61 1.25 297 196 total 1.12 1.78 798 971

Referring to Table 2 above, the embodiment, if the point is the comparative example 1 by reducing the stage per volume of 173 g / m ² as compared to, 700 g / m could be produced for the artificial leather weight reduction of the class ² Can be confirmed.

The samples of the above examples were divided into the samples before and after the punching work normally applied to the car seat, and the properties were evaluated.

Evaluation of each property was carried out according to the following method.

In the vertical, horizontal and then harvested three test pieces of 100 ㎜ dog maintained at a temperature of 23 ± 2 ℃, relative humidity 50 ± 5% state, strapping the weight of each test piece to obtain the mean value of 1m ² by weight, respectively: Weight Rating Respectively.

Thickness evaluation: Using a dial gauge measuring device with a contact surface diameter of 10 Φ and a load of 50 to 140 gf (0.49 to 1.37 N) in a PRESSURE FOOT, 5 points in arbitrary points on the same LOT test specimen ) Were obtained.

2) Physical property evaluation result of sample without punching (solid sample)

The properties of the non-punched non-punched samples were evaluated and summarized in Table 3 below. The evaluation method of each test item is as follows.

Tensile Strength and Tensile Elongation: Five specimens were taken and the gauge was marked at the center, and the maximum weight was measured until the test piece fractured by being tied to a tensile tester (clamp spacing 150 mm) and a tensile speed of 200 mm / min. The tensile elongation was calculated by the following formula 1.

(1) L = (L ₁ -L ₀ ) / L ₀

(L: elongation percentage, L ₀ : distance between points before test, L ₁ : distance between points at break after test, or distance between points when artificial leather skin or air bubble breaks)

Tear strength: Evaluated using a tensile tensile tester. The specimens were cut with a part of the specimen and put on a tensile tester. The average value of 5 maxima of the load when tearing at a tensile speed of 200 mm / min was obtained.

Bending Friction: Using a friction tester (scott type bending friction tester), four specimens are taken in the transverse and longitudinal directions, and the two specimens are clamped with one set. Perform a friction test at a reciprocating speed of 120 minutes / time and a travel distance of 50 mm.

Rupture strength: Three test specimens of 100 mm width and 100 mm length are mounted on a rupture tester (MULLEN type) and pressed. The tear strength is expressed as the pressure at which the rubber diaphragm breaks through the specimen, resulting in an average value of the three specimen results.

Tackiness free: Tackiness free: The surfaces of two test specimens were combined and placed on two glass plates. The weight was placed in the center. The sample was placed in a hot-air oven (around 80 ℃) for 22 hours and allowed to stand in the room. Remove and check the adhesion of the surface and the damage.

SOFTNESS: 5 pieces of Φ100 mm test specimens are sampled using ST300D equipment and the SOFTNESS is measured (15 second DELAY method).

Test Items unit Evaluation standard Test result Evaluation results Vertical horizontal The tensile strength kgf / 30mm Over 24/12 39.9 74.5 Great Attachment rate % 25/25 or more 71.2 63.0 fitness Phosphorus thermal strength kgf 1.5 or more 4.3 8.4 Great My oyster marsh castle (2000 times
Pass) 4.8 clear clear Great Wave strength kgf / cm ² 9.0 or higher 15.5 Great Non-adherent (80 占 폚 * 22 hours) There should be no damage No damage Great SOFTNESS mm 3 to 5 3.9 fitness

Referring to the above Table 3, it can be seen that the tensile elongation is almost the same as that of the artificial leather of Comparative Example 1, which has a tensile elongation only in one direction, Show. In addition, despite the light characteristics compared to Comparative Example 1, which is a conventional product, the required properties were satisfied with satisfactory or excellent range.

3) Results of physical property evaluation of punching sample (punching sample)

The properties of the samples to which punching was applied (see FIG. 4) were evaluated and summarized in Table 4 below. The test method was the same as that described above.

Test Items unit Evaluation standard Test result Evaluation results Vertical horizontal The tensile strength kgf / 30mm Over 24/12 24.8 33.5 Great Attachment rate % 25/25 or more 63.5 57.5 fitness Phosphorus thermal strength kgf 1.5 or more 4.4 7.8 Great My oyster marsh castle (2000 times
Pass) 4.8 clear clear Great Wave strength kgf / cm ² 9.0 or higher 10 Great Non-adherent (80 占 폚 * 22 hours) There should be no damage No damage Great SOFTNESS mm 3 to 5 4.3 fitness

Referring to the results in Table 4 above, the tensile strength and the tear strength were slightly lower than those of Table 3 showing the physical properties of the non-woven sample, but the results of the SOFTNESS showed better results It looked. The tensile elongation of the punching sample was maintained at a similar level, which shows that it has excellent workability.

For punching applied samples, the thickness was 1.09 mm, which was almost similar to that of the plain sample. The punching effect reduced the weight to 762 g / m ² .

4) Comparative Example  1 and Example  Observation of occurrence of lint during punching

After the punching operation of the punching sample according to the embodiment was performed, it was confirmed whether or not fluff was formed, and the result was shown in Fig. The fuzz resistance test was carried out using a Velcro test, and the sample specimens were visually evaluated for fuzziness after lapping 90 times in transverse, longitudinal, and diagonal directions, respectively.

Referring to FIG. 5, the punching sample of the embodiment was evaluated as having excellent fuzz resistance because no appearance of fuzz was observed in all the tests for the fuzz resistance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

Claims (13)

A property-imparting layer comprising any one selected from the group consisting of polyurethane, thermosetting polyurethane, polyvinyl chloride, and combinations thereof; And
And a support layer comprising an extensible fabric having a ratio of a tensile elongation in an oblique direction to a warp direction in a ratio of 1: 0.8 to 1.5,
The fabrics are prepared by applying a rayon covering 50 to 80 denier polyester yarns to 100 to 180 denier polyurethane yarns on an oblique line and applying 50 to 80 denier polyester yarns to a single polyurethane yarn of 50 to 90 denier Covered artificial leather and a polyester yarn of 400 to 500 denier is applied. The method according to claim 1,
Wherein the fabric has a polyurethane content of 20% by weight or more. The method according to claim 1,
Wherein the fabric has a warp density of 60 to 90 / inch and a weft density of 60 to 90 / inch. The method according to claim 1,
Wherein the fabric has a weft density of 50 to 80 denier polyester yarns covering 50 to 90 denier polyurethane yarns and a polyester yarn of 400 to 500 denier having a weft density of 4: Artificial leather for sheets with fuzziness. The method according to claim 1,
Wherein the fabric has a fabric structure of a flat fabric, a twill fabric, a weave fabric, a basket fabric, or a weave fabric. The method according to claim 1,
Wherein the artificial leather for the sheet has a weight of less than 850 g / m < ² >. The method according to claim 1,
The artificial leather for a seat has a thickness of 1 to 1.3 mm. 2. The semiconductor device according to claim 1,
A foam layer contacting the support layer and containing pores, and
And a surface layer located on the foam layer. 9. The method of claim 8,
Wherein the foam layer is a polyvinyl chloride-containing layer having a pore size of from 30 [mu] m to 250 [mu] m and a thickness of from 0.25 to 0.4 mm. 9. The method of claim 8,
Wherein the surface layer is a polyvinyl chloride-containing layer having a thickness of 0.15 mm to 0.25 mm. 9. The method of claim 8,
Wherein the artificial leather for the sheet has a weight of 750 to 850 g / m < ² >. Preparing a support layer comprising a bi-directional stretch fabric having a ratio of a tensile elongation in an oblique direction and a warp direction of 1: 0.8 to 1.5; And
Applying a solution for forming a property-imparting layer on the support layer, and performing a drying step or a foaming step after drying to form a property-imparting layer,
The fabrics are prepared by applying a rayon covering 50 to 80 denier polyester yarns to 100 to 180 denier polyurethane yarns on an oblique line and applying 50 to 80 denier polyester yarns to a single polyurethane yarn of 50 to 90 denier Coated yarn and a polyester yarn of 400 to 500 denier is applied to the artificial leather. 13. The method of claim 12,
Wherein the property imparting layer forming step includes a foam layer forming step and a surface layer forming step,
The foaming layer forming step is a step of forming a foam layer on a support layer comprising 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0 to 30 parts by weight of a filler, and 0.1 to 2 parts by weight of a foaming agent And then drying to form a foam layer,
Wherein the surface layer forming step is a step of forming a surface layer composition comprising 100 parts by weight of a base resin containing polyvinyl chloride, 50 to 100 parts by weight of a plasticizer, 0.1 to 10 parts by weight of a heat stabilizer, and 0.01 to 1 part by weight of an ultraviolet absorber, And drying the resulting mixture to form a surface layer. The method of producing an artificial leather for a sheet having poultice resistance.

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