KR101905798B1 - Altificial leather for use as vehicle interior material and method for manufacturing same - Google Patents

Abstract

It is an artificial leather made of thermoplastic elastic polyester (POLYESTER) material which satisfies the physical properties required for automobile interior materials. It has excellent aesthetics such as natural leather similar surface pattern, natural wrinkle effect, fullness and volume feeling, , A flame retardancy, a heat resistance and a hydrolysis resistance, can reduce the occurrence of harmful substances when a fire occurs in a vehicle, and has excellent moldability for application as an automobile interior material, and a method for manufacturing the same.

Description

TECHNICAL FIELD [0001] The present invention relates to an artificial leather for automobile interior materials and a method for manufacturing the same. BACKGROUND ART [0002]

The present invention relates to an artificial leather for automobile interior materials and a method for manufacturing the same, and more specifically to an artificial leather which can satisfy physical properties similar to those of natural leather, excellent flexibility, .

Since the time of staying in the car is increasing due to the changes in the living pattern, the interior material for the interior of the car is a product that breathes and moves with the driver and the passenger all the time in the interior space of the vehicle. Therefore, Sensibility and aesthetic factors are important because consumers can easily recognize the difference and feel the body compared to other general automobile parts. Basically, it is required to have high flame retardancy, fastness, strength and durability for each application , And various properties such as antifouling property, deodorant property, and other properties related to aesthetics are required.

Seat interior, dash board, door trim, and head line are used for automobile interior materials. Mainly used materials are fabric products, PVC products, PU products, natural Leather goods and so on.

The applied materials are applied differently according to the type of vehicle and the application area, and the automobile manufacturer selects and uses materials in consideration of the recent eco-friendly market trends.

For example, we are making efforts to improve the rehabilitation rate by unifying the materials used in the fabric with polyester. In the case of PVC materials where environmental hormone substances are a problem, we are trying to replace them with PU products, TPU, TPO .

Due to such changes in the industrial environment and increase in consumer demand, the high quality natural leather surface effect and sensitivity can be achieved in accordance with the tendency of the interior materials to be eco-friendly, high quality, high physical properties and high function, and high quality, high functionality, The demand for artificial leather products using new material / method with harmony is steadily increasing.

Artificial leather products are products to replace natural leather. It is made of various kinds of film or coating resin layer on fiber support. It is a product that expresses pattern in various ways for wrinkle effect of natural leather.

The polyurethane (PU) artificial leather can be divided into a wet processing method and a dry processing method according to the manufacturing method. The wet processing method is a method in which a polyurethane resin and a dimethyleformamide (DMF) And a method of dry-forming is a method of applying a mixture of polyurethane resin, MEK (Methylethyleketone), and DMF resin onto a release paper having a pattern engraved thereon, followed by hot air drying to form a film and adhere to the support material. (VOC) is detected during use, there is a limitation in the application of automobile interior materials. In addition, since the cyanogen gas, which is a toxic gas, is generated during the combustion, There is an environmental problem.

PVC artificial leather is excellent in workability and low price, so it is widely used for various kinds and applications. However, when used for a long time, there are problems such as cracking of coating and generation of VOC, problems of SOFTNESS, and toxic substances such as DEHP (Di-2 ethylhexylphthalate) which is an environmental hormone in plasticizers used for improving processability. The manufacturer is strictly restricted in its use, and legal regulations are expected to be strengthened in the future

Conventionally, in order to solve the problems of the artificial leather mentioned above, products using a water-based polyurethane emulsion resin and a solventless high-solids PU product have been proposed and carried out. However, water problems, quality stability, There is still a problem of rising and recycling.

Recently, Korean Patent Application No. 10-2015-0112381 proposes an artificial leather using a thermoplastic elastic polyester material. However, since the emotional side, the wear properties and the pattern retention properties are still insufficient, And high-quality materials.

The present invention relates to an artificial leather for automobile interior materials and a method for manufacturing the same.

An object of the present invention is to provide an artificial leather using a thermoplastic elastic polyester material which satisfies physical properties required for a material for an automobile interior material.

It is another object of the present invention to provide an artificial leather for automobile interior materials having excellent sensibility and excellent flexibility such as a natural leather-like surface pattern, a natural wrinkle effect, a feeling of fullness and a feeling of volume, and a method of manufacturing the same.

The present invention provides an artificial leather for automobile interior materials and a method for manufacturing the same, which has light resistance, flame retardancy, heat resistance and hydrolysis resistance, can reduce the generation of harmful substances when a fire occurs in a vehicle, For another purpose.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and claims.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the drawings, the thickness and the size of each layer are assumed for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a,""an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

In one embodiment of the present invention, the present invention provides a base material comprising: a base substrate layer comprising a polyester fabric;

An adhesive layer laminated on one surface of the base substrate layer; A skin film layer laminated on one side of the adhesive layer and comprising a polyether ester block copolymer; And a surface treatment layer laminated on one surface of the skin film layer.

More specifically, the base material layer may include a material selected from the group consisting of a warp knitted fabric made of polyester, a circular knitted fabric made of polyester, a polyester nonwoven fabric and a polyester sea chart microfine nonwoven fabric, It is not.

Wherein the adhesive layer is a hot-melt adhesive layer or an aqueous liquid resin adhesive layer, and the hot-melt adhesive layer may include a polyester copolymer and a dicarboxylic acid having a lower melting point than the copolymer of the skin film layer, More specifically, the polyurethane-based adhesive resin is a polymer of an aliphatic isocyanate and an ester-based polyol, a polymer of an isocyanate and an ether-based polyol, and a water-based polyester-based resin The adhesive resin is a polymer of TPA (terephthalic acid) and ethylene glycol, and the adhesive composition that can be used for the adhesive layer is not limited to the examples.

The skin film layer may include a polyether ester block copolymer, a slip agent, and an elastic polymer. The skin film layer may contain 45 to 85% by weight of a polyetherester block copolymer, 10 to 50% by weight of an elastic polymer, and 0.01 To 5% by weight of the slip agent, but is not limited to the examples.

The polyetherester block copolymer may include an aromatic polyester as a hard segment and an aliphatic polyether as a soft segment, wherein the soft segment in the polyetherester block copolymer has a molecular weight of from 10 to 50 wt% %, But are not limited to examples.

The elastic polymer may be selected from the group consisting of thermoplastic polyurethane (TPU) having a Shore A hardness of 50 to 90, acrylonitrile-butadiene rubber (NBR) and silicone rubber , But are not limited to examples.

The surface treatment layer may include a polymer resin of 83 to 99.95 wt% and a wear-enhancing agent of 0.05 to 17 wt%, and the polymer resin may be an aqueous polyurethane resin or a water-based polyester resin, no. The abrasion-strength enhancing agent is more specifically a silicon-based slip agent, but is not limited to the examples.

The thickness of the surface treatment layer is 1 to 15 占 퐉; The thickness of the skin film layer is 50 to 200 占 퐉; The thickness of the adhesive layer is 20 to 150 mu m, preferably, the thickness of the surface treatment layer is 3 to 10 mu m, the thickness of the skin film layer is 100 to 150 mu m, the thickness of the adhesive layer is 30 to 100 mu m, It is not. When the thickness of the surface treatment layer is less than 1 mu m, there is a problem of weak strength. When the thickness exceeds 15 mu m, there is a problem that touch feeling is decreased. When forming the emboss pattern, And the like. When the thickness of the skin film layer is less than 50 탆, there is a problem that the physical properties are lowered and unevenness appears. When the thickness is more than 200 탆, the sensitivity is deteriorated. When the thickness of the adhesive layer is less than 20 mu m, there is a problem that the adhesive strength is lowered. When the thickness is more than 150 mu m, the sensitivity is lowered.

In one embodiment of the present invention, the present invention provides a method for producing a skin film, comprising: 1) preparing a skin film layer; 2) producing an adhesive layer; 3) depositing the skin film layer of the step 1), the adhesive layer of the step 2), and the base substrate layer, and laminating the skin film layer, the adhesive layer, and the base substrate layer in this order; And 4) forming a surface treatment layer on one side of the skin film layer.

Specifically, the step 1) of producing the skin film layer comprises the steps of: 1-1) preparing a block copolymer by condensation polymerization of an aromatic polyester as a hard segment and an aliphatic polyether as a soft segment; 1-2) preparing a mixture by mixing the 1-1) block copolymer, the slip agent, and the elastic polymer; And 1-3) a step of subjecting the mixture of the step 1-2) to extrusion molding by T-DIE to produce a film.

The step of preparing the adhesive layer in the step 2) comprises: 2-1) preparing a bonding mixture by mixing a polyester copolymer and a dicarboxylic acid having a lower melting point than the copolymer of the skin film layer; And 2-2) a step of extruding the adhesive mixture of the step 2-1) into a film by T-DIE extrusion molding.

The step of preparing the skin film layer of the step 1) and the step of producing the adhesive layer of the step 2) may include 1-a) condensation polymerization of an aromatic polyester which is a hard segment and an aliphatic polyether which is a soft segment, Producing a combination; 1-b) mixing the 1-1) block copolymer, the slip agent and the elastic polymer to prepare a mixture; 2-a) preparing a bonding mixture by mixing polyester copolymer and dicarboxylic acid having a lower melting point than the copolymer of the skin film layer; And

2-b) co-extruding the mixture of 1-b) and the adhesive mixture of 2-a) into two layers (LAYER) by a T-DIE method.

In the step 3), the skin film layer, the adhesive film, and the base substrate layer may be laminated and pressed by using a thermal cylinder drum at 120 to 170 ° C and 3.5 to 4.5 bar.

The step of combining in step 3) comprises: The step of patterning the skin film layer, the adhesive film, and the base material layer may be further included.

In one embodiment of the present invention, the present invention provides a method for producing a skin film, comprising: 1) preparing a skin film layer; 2) forming an adhesive layer on one surface of the skin film layer in the step 1); 3) depositing a base substrate layer on one surface of the adhesive layer in the step 2), laminating the skin film layer, the adhesive layer and the base substrate layer in this order; And 4) forming a surface treatment layer on one side of the skin film layer.

Artificial leather made of thermoplastic elastic polyester (POLYESTER) material which satisfies the physical properties required for automobile interior materials. Superior sensibility and excellent flexibility such as natural leather similar surface pattern, natural wrinkle effect, fullness and volume feeling The present invention provides artificial leather for automobile interior materials and a method for manufacturing the same, which can reduce the occurrence of harmful substances when a fire occurs in a vehicle due to light resistance, flame resistance, heat resistance and hydrolysis resistance, can do.

1 is a sectional view of a synthetic leather according to one embodiment of the present invention.
2 is a flowchart of a method for manufacturing artificial leather for automobile interior materials according to one embodiment of the present invention.
3 is a flowchart illustrating a method of manufacturing a skin film layer of an artificial leather for an automobile interior material according to an embodiment of the present invention.
4 is a flowchart of a method for manufacturing an adhesive layer of artificial leather for automobile interior materials according to an embodiment of the present invention.
5 is a flowchart illustrating a method for manufacturing artificial leather for automobile interior materials according to an embodiment of the present invention.

The artificial leather for automobile interior material of the present invention and the method of manufacturing the same will be described in more detail with reference to FIGS. 1 to 5.

1 is a cross-sectional view of an artificial leather according to an embodiment of the present invention, wherein the artificial leather for an automobile interior material of the present invention comprises a surface treatment layer 100; A skin film layer 200; An adhesive layer 300; And a base substrate layer 400.

Since the base material layer 400 affects the mechanical properties required for each application of the automobile interior material, it is preferable to select the base material layer 400 in consideration of application-specific characteristics such as thickness, width, tensile strength, tear strength and elongation. It is essential that the base substrate layer 400 has a sense of volume, good flexibility and fullness in that it can determine the basic physical properties of the artificial leather and the texture at the time of contact. Therefore, it is most preferable to use the polyester fabric Do. The fabric of the polyester material may be selected from the group consisting of a warp knitting yarn made of polyester, a circular knitting yarn made of polyester, a polyester nonwoven fabric, and a polyester sea-island microfiber nonwoven fabric.

The adhesive layer 300 imparts an adhesive force between the skin film layer and the base substrate layer. The adhesive layer 300 may be a hot-melt adhesive layer or an aqueous liquid resin adhesive layer.

When the adhesive layer 300 is a hot-melt adhesive layer, a polyester having a melting point lower than that of the skin film layer is used, and the adhesive layer can be formed by infiltrating the melt-like polymer into the fabric. The adhesive layer is a polyester polymer having a melting point of 100 to 170 DEG C and a hardness of 20 to 40 D (SHORE D) and a melt flow index (MI) of 10 to 50 g / min and a temperature of 190 DEG C / 2.16 kg load (D1238) Lt; / RTI > In addition, the adhesive layer may further include a dicarboxylic acid so as to improve the adhesive strength through thermal fusion with the polyetherester block copolymer for skin film. The dicarboxylic acid may be selected from the group consisting of isophthalic acid, oxalic acid and adipic acid, more preferably isophthalic acid.

The content of the dicarboxylic acid is preferably 15% by weight or less. If the content of the dicarboxylic acid is less than 15% by weight, the bonding temperature may not be lowered and the adhesive strength may be lowered.

When the adhesive layer 300 is an aqueous liquid resin adhesive layer, the adhesive layer 300 may include an aqueous polyurethane-based polymer resin or an aqueous polyester resin.

The skin film layer 200 may be formed into a film by extrusion molding a block copolymer with a surface layer of an artificial leather including a polyether ester block copolymer by T-DIE. The copolymer forming the skin film layer 200 has a melting point (Tm) of 130 to 220 캜, preferably 150 to 190 캜 and a hardness of 20 to 50 D (SHORE D) 10 to 50 g / 10 min, a temperature of 220 DEG C / 2.16 kg load (D1238), a recovery rate of 50 to 80% and a elongation at break of 400 to 1000%.

More specifically, the skin film layer 200 comprises a polyetherester block copolymer, a slip agent, and an elastic polymer, specifically, 45 to 85% by weight of a polyetherester-based block copolymer, 10 to 50% By weight of an elastic polymer and 0.01 to 5% by weight of a slip agent.

The polyetherester block copolymer of the skin film layer 200 includes a hard segment which is a small crystalline portion and a soft segment which is an amorphous portion. The soft segments are narrow and wide, and the hard segments are gripped to make the artificial leather elastic.

The soft segment content may be comprised between 10 and 50% in the polyetherester block copolymer. When the content of the soft segment is increased, the elasticity and softness are increased. However, when the content of the soft segment is higher than 50%, the hard segment, which is a crystalline portion, is decreased and the solidification rate is lowered. If it is less than 10%, there is a problem that the elastic properties of artificial leather are weak, so that it is easily damaged by an external impact and is not smooth.

The hard segment is an aromatic polyester, more specifically polybutyleneterephthalate, and the hard segment is obtained by polymerizing 2,6-naphthalenedicarboxylic acid and derivatives thereof with 1,4-butanediol , Terephthalic acid and 1,4-butanediol.

The soft segment is an aliphatic polyether, more specifically polytetramethylene glycol (PTMG).

The skin film layer 200 includes 10 to 50% by weight of an elastic polymer, and the elastic polymer is included to improve a surface pattern similar to a natural leather, a wrinkle effect, a feeling of fullness and volume, and the like. Shore A May be selected from the group consisting of thermoplastic polyurethane (TPU), acrylonitrile-butadiene rubber (NBR) and silicone rubber having a hardness of 50 to 90, preferably thermoplastic polyurethane polyurethane, TPU), but are not limited to examples. When the elastic polymer is contained in an amount of less than 10% by weight, improvement in emotional quality such as surface pattern similar to natural leather, natural wrinkle effect, fullness feeling and volume feeling is insufficient, %, The kneading property of the polymer at the time of extrusion may be lowered to cause unevenness of the surface, non-uniformity of the thickness, surface unevenness, T-die (T-DIE) extrusion workability, there is a problem.

The slip agent is for improving the abrasion strength of the skin film layer, and the slip agent is a silicon dispersion, more specifically, may include dimethylvinyl terminated siloxane having polyethylene and dimethylvinyl groups. When the slip agent is contained in an amount of less than 0.01% by weight, there is a problem that the effect of improving the abrasion strength is insufficient. When the amount of the slip agent is more than 5% by weight, There is a problem that the adhesive force with the adhesive layer is lowered.

The skin film layer 200 may further include an antioxidant and an ultraviolet absorber. The antioxidant may be at least one selected from the group consisting of titanium dioxide (TiO ₂ ), hindered compounds, and phenolic compounds And the ultraviolet absorber is a benzotriazole based compound, but is not limited to the examples. The phenolic compounds can be used with conventional antioxidants used for oxidative stabilization.

The surface treatment layer 100 includes a polymer resin of 83 to 99.95 wt% and an abrasion strength enhancer of 0.05 to 17 wt%, and the polymer resin is an aqueous polyurethane resin or a water-based polyester resin, Do not. The surface treatment layer may contain a wear-increasing agent. The wear-increasing agent is more specifically a silicon-based slip agent. When the slip agent is contained in an amount less than 0.05% by weight, the effect of increasing the wear strength is insufficient. If the weight% is exceeded, there is a slippery problem at the time of contact, and there is a problem that the cost is raised economically.

FIG. 2 is a flow chart of a method for manufacturing artificial leather for automobile interior materials according to an embodiment of the present invention, including: 1) producing a skin film layer (S100); 2) manufacturing an adhesive layer (S200); 3) assembling the skin film layer of step 1), the adhesive layer of step 2), and the base substrate layer (step S300); And 4) forming a surface treatment layer on one side of the skin film layer (S400).

More specifically, the step (S100) of producing a skin film layer includes: 1-1) a step S110 of producing a block copolymer by condensation polymerization of an aromatic polyester as a hard segment and an aliphatic polyether as a soft segment; 1-2) preparing a mixture by mixing the 1-1) block copolymer, the slipping agent, and the elastic polymer (S120); And 1-3) a step (S130) of forming a film form by subjecting the mixture of the step 1-2) to a T-DIE extrusion molding.

As described above, the skin film layer of the present invention comprises a polyetherester block copolymer; Slip agent; And an elastic polymer. In order to prepare a skin film layer, first, a polyetherester-based block copolymer should be prepared. The copolymer is made into a film so that the film can exhibit flexibility and elasticity.

The polyetherester block copolymer can be prepared by condensation polymerization of an aromatic polyester which is a hard segment and an aliphatic polyether which is a soft segment, and a slip agent and an elastic polymer are mixed with the produced block copolymer To prepare a mixture, and the resulting mixture can be extruded through a T-die (T-DIE) to produce a film. In the T-die (T-DIE) extrusion molding, the mixture is put into an extruder, melted at 170 to 220 캜, and extruded to a film having a thickness of 50 to 200 탆. The molten mixture may exhibit a flow index of 10 to 50 g / 10 min and a load of 2.00 to 2.40 kg.

The step (S200) of producing the adhesive layer in the step 2) comprises: 2-1) preparing a bonding mixture by mixing polyester copolymer and dicarboxylic acid having a lower melting point than the copolymer of the skin film layer (S210); And 2-2) a step S220 of extruding the adhesive mixture of the step 2-1) by T-DIE into a film form (S220).

More specifically, the adhesive layer is a hot-melt adhesive layer, which is a polyester copolymer having a lower melting point than that of the copolymer of the skin film layer. More specifically, the adhesive layer has a melting point of 100 to 170 캜 and a hardness of 20 to 40 D (SHORE D) An index (MI) of 10 to 50 g / 10 min, and a temperature of 190 deg. C / 2.16 kg load. The hot melt adhesive layer may comprise a dicarboxylic acid to enable low temperature bonding.

The skin film layer and the adhesive layer can be separately prepared (S300) after separately preparing the skin film layer (S100) and the adhesive layer (S200) as described above. However, Extruding the mixture (S120) for forming the film layer and the mixture (S210) for producing the film layer into two layers (LAYER) by a T-DIE method.

The step S300 of the step 3) may be performed by pressing the skin film layer of the step 1), the adhesive film of the step 2) and the base material layer using a thermal cylinder drum at 120 to 170 ° C and 3.5 to 4.5 bar Can be assembled.

As described above, when the skin film layer and the adhesive layer are formed by co-extruding into two layers by a T-DIE method, the adhesive layer and the base substrate layer are laminated so as to be in contact with each other, .

The assembling step S300 of the step 3) may further include the step of patterning the skin film layer of the step 1), the adhesive film of the step 2), and the base material layer. It can show excellent aesthetics such as natural leather like surface pattern, natural wrinkle effect, fullness and volume feel.

4) The step S400 of forming the surface treatment layer on one side of the skin film layer is more specifically roll coating. For roll coating, one side of the skin film layer may be coated with a gravure roll at 100 to 140 mesh.

In the case of using an aqueous polyurethane resin or a water-based polyester resin instead of the hot-melt adhesive layer as the adhesive layer (S200?), The water-based polymer resin is knife coated on the one surface of the skin film layer prepared in step 1) The base substrate layer may then be laminated and glued (S300?). The application amount of the coating liquid is 50 g / sqm to 300 g / sqm. When the base substrate layer is adhered to the base substrate layer, the coating liquid is dried and adhered by hot air at 70 to 150 ° C, or partially dried at 70 to 150 ° C before adhering to the base substrate layer, The adhesive layer may be bonded to the base substrate layer and cured by hot air at 80 to 150 占 폚. After the adhesive is adhered, a post curing step is carried out in a aging room at 70 to 100 DEG C for 5 to 24 hours to obtain a sufficient adhesion, thereby inducing a sufficient curing reaction.

The method of forming the adhesive layer (S200, S200 ') can be distinguished in two ways. First, the hot-melt adhesive layer (S200) is used. The second method uses an aqueous polyurethane resin or an aqueous polyester resin (S200'). to be. In the case of a hot-melt adhesive layer, a hot-melt adhesive film is prepared (S200), and a skin film, a hot-melt adhesive film, and a base material layer are stacked and laminated (S300). When an aqueous polymer resin is used as an adhesive layer (S200 '), an adhesive resin is applied on one surface of the skin film layer in a coating manner, the base substrate layer is laminated, and the adhesive (S300' )do. As a result, due to the difference in the components of the adhesive layer, the steps of forming and adhering the adhesive layer can be distinguished.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood that both the foregoing description and the following detailed description are exemplary, explanatory and are intended to be illustrative, and not restrictive. The scope of the invention is defined by the appended claims rather than by the foregoing description. will be.

Example  One

Manufacture of artificial leather for automobile interior materials

1-1) Preparation of skin film layer

A block copolymer was prepared by condensation polymerization of poly (butylene terephthalate), a hard segment, and poly (tetramethylene glycol), a soft segment.

85% by weight of the block copolymer, 5% by weight of dimethylsiloxane and 10% by weight of TPU were mixed to prepare a mixture. The mixture was poured into an extruder, melted at 170 to 220 DEG C, and extruded into a 150 mu m-thick film.

1-2) Preparation of adhesive layer

A polyester polymer having a melting point of 100 to 170 DEG C and a hardness of 40 to 40D (hardness SHORE D) and having a melt flow index (MI) of 10 to 50 g / min and a temperature of 190 DEG C / 2.16 kg load (D1238) Phthalic acid were mixed to prepare an adhesive mixture.

The adhesive mixture was put into an extruder, melted at 170 to 220 캜, and extruded into a film having a thickness of 50 탆.

1-3) Preparation of Coating Solution for Surface Treatment Layer

Aliphatic polyester, polyether copolymer type Water-based polyurethane resin 90 wt% and silicon-based slip 10 wt% were mixed to prepare a coating solution.

1-4) Manufacture of artificial leather

The skin film; Adhesive film; And polyester nonwoven fabric were laminated in this order, and were laminated at 150 ° C and 4 bar. In order to express the natural leather shape on the surface, the product was preheated at 350 ° C using a ceramic heater, and the emboss pattern was expressed by a cooling roll at 30 ° C. Thereafter, the coating solution was coated on one side of the skin film layer with a gravure roll at a rate of 30 g / sqm and dried in a hot air chamber at 120 캜 to produce artificial leather.

Comparative Example 1

The procedure of Example 1 was repeated except that TPU was not added to the skin film layer and 95 wt% of the block copolymer was added.

Comparative Example 2

The procedure of Example 1 was repeated except that 5% by weight of TPU and 90% by weight of a block copolymer were added to the skin film layer.

Comparative Example 3

The same procedure as in Example 1 was conducted except that 55% by weight of TPU and 40% by weight of a block copolymer were added to the skin film layer.

Comparative Example 4

A slip agent was not added to the skin film layer, and 90 parts by weight of a block copolymer was added.

Comparative Example 5

The procedure of Example 1 was repeated except that no artificial leather without surface coating was formed and no surface treatment layer was formed.

Experimental Example 1

Evaluation of physical properties and sensibility of artificial leather

(1) Flexibility measurement

In order to measure the softness, it is measured using ST-3000. The measurement unit of the ST-3000 is mm, and the ring diameter is 25 mm. The higher the measured value, the better the flexibility.

(2)

The degree of natural wrinkling and the degree of bending were judged when bending. It is divided into 1 to 5 grades. The higher the grade, the better the bendability. In order to judge the bendability, 10 experts were evaluated.

(3) Measurement of heat stability

After standing for 300 hours in a 110 ° C oven, the change of the surface state was visually determined.

It was examined visually. When the state of the surface was changed, the grade of fail was given. When there was no change, the grade of pass was given.

The evaluation method was performed according to ms-321-07 4.7.

(4) Surface appearance evaluation

The degree of staining and granulation due to the difference in compatibility of the resin was evaluated. The degree of surface appearance was evaluated by visual evaluation of 10 evaluation members.

Flexibility Abrasion strength Heat aging degree Appearance uniformity Workability Example 5 150,000 PASS 4 4 Comparative Example 1 3.5 150,000 PASS 4 4 Comparative Example 2 4 120,000 PASS 3.5 3.5 Comparative Example 3 5.5 100,000 FAIL 2 2 Comparative Example 4 4.8 70000 PASS 4 4 Comparative Example 5 5 30,000 PASS 4 4

Table 1 shows the physical properties and sensitivity evaluation results of the examples and the comparative examples 1 to 5.

In the case of Examples, excellent results were obtained in both flexibility, abrasion strength, heat aging degree, appearance uniformity and workability.

On the other hand, in Comparative Example 1, TPU was not included in the skin film layer. The abrasion strength, heat aging degree, appearance uniformity and workability were the same as those of the Examples, but the TPU was not included, A problem has occurred.

Comparative Example 2 was obtained by adding TPU in an amount of less than 10% by weight. Although the flexibility was improved as compared with Comparative Example 1, there was a problem that the flexibility was lower than that of Examples, and the abrasion strength, appearance uniformity and workability The problem was falling compared to the example.

In Comparative Example 3, the TPU was added in an amount of more than 50% by weight. Although it was confirmed that the flexibility was improved due to the excessive addition of TPU, there was a problem that the abrasion strength, appearance uniformity and workability were poor. There was a problem in heat aging with FAIL rating.

In Comparative Example 4, artificial leather was prepared without slip agent. The flexibility, appearance uniformity, and workability were similar to those in Examples, but showed a large difference in wear strength.

Comparative Example 5 was an artificial leather not including the surface treatment layer and had the same degree of flexibility, heat aging degree, appearance uniformity and workability as those of the Examples, but the wear strength was reduced to 1/5 of the abrasion strength There was a problem of falling too much.

As a result, in the case of TPU, when the content is below the content range of the present invention, there is a problem that the flexibility and the abrasion strength are lowered. When the TPU is included in an amount exceeding the above range, the softness is increased but the abrasion strength, heat aging degree, There is a problem that workability is poor.

When the slip agent is not included, there is a problem that the abrasion strength is lowered. When the slip agent is contained in an amount exceeding 5 wt%, a uniform extruded film can not be obtained at the time of extrusion, the uniformity of the film thickness is decreased, Uniform pressure is not applied due to the slip between the screw and the resin by the resin, thereby making it difficult to manufacture the film. Also, even if it was made into a film, the adhesive force with the hot melt film was lowered, and a blooming phenomenon occurred in which the slip component rose on the surface with time.

In the case of the surface treatment layer, it is said to improve the abrasion strength of the artificial leather.

Claims (18)

A base substrate layer comprising a polyester fabric;
An adhesive layer laminated on one surface of the base substrate layer;
A skin film layer laminated on one side of the adhesive layer and comprising 45 to 85% by weight of a polyetherester block copolymer, 10 to 50% by weight of an elastic polymer and 0.01 to 5% by weight of a slip agent; And
And a surface treatment layer laminated on one surface of the skin film layer,
The polyetherester block copolymer comprises an aromatic polyester which is a hard segment and an aliphatic polyether which is a soft segment,
Wherein the soft segments in the polyetherester block copolymer comprise 10 to 50 wt%. The method according to claim 1,
Wherein the base material layer is selected from the group consisting of a warp knitted fabric made of polyester, a circular knitted fabric made of polyester, a polyester nonwoven fabric, and a polyester sea chart microfiber nonwoven fabric. The method according to claim 1,
Wherein the adhesive layer is a hot-melt adhesive layer or a water-based liquid resin adhesive layer. The method of claim 3,
Wherein the hot-melt adhesive layer comprises a polyester copolymer and a dicarboxylic acid having a lower melting point than a copolymer of the skin film layer and a dicarboxylic acid. The method of claim 3,
Wherein the aqueous liquid resin adhesive layer is an aqueous polyurethane-based polymer resin or a water-based polyester resin. delete delete delete The method according to claim 1,
Wherein the elastic polymer is selected from the group consisting of a thermoplastic polyurethane (TPU) having a Shore A hardness of 50 to 90, acrylonitrile-butadiene rubber (NBR) Artificial leather for interior materials. The method according to claim 1,
Wherein the surface treatment layer comprises 83 to 99.95 wt% polymer resin and 0.05 to 17 wt% abrasion strength enhancer,
Wherein the polymer resin is an aqueous polyurethane resin or a water-based polyester resin. The method according to claim 1,
The thickness of the surface treatment layer is 1 to 15 占 퐉;
The thickness of the skin film layer is 50 to 200 占 퐉;
Wherein the thickness of the adhesive layer is 20 to 150 占 퐉. delete delete delete delete delete delete delete

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