KR20210029085A - Manufacturing method of synthetic leather - Google Patents

Abstract

Disclosed in the present invention is a method for manufacturing artificial leather, which comprises the following steps: forming a first primer layer on a first thermoplastic polyolefin elastomer (TPO) layer; forming a printed layer on the first primer layer; and adhering a second TPO layer on the printed layer. The present invention has an effect of providing the method for manufacturing the artificial leather excellent in bending resistance, restoration properties, and stain resistance.

Description

Artificial leather manufacturing method{MANUFACTURING METHOD OF SYNTHETIC LEATHER}

It relates to a method for manufacturing artificial leather, and more particularly, a first primer layer is formed on a first thermoplastic polyolefin elastomer (TPO) layer, a printing layer is formed on the first primer layer, and a first primer layer is formed on the printing layer. It relates to a method for manufacturing artificial leather comprising the step of adhering a 2TPO layer.

In general, natural leather is widely used in products such as shoes, bags, wallets, various pouches, sofas, and clothing, but its resources are limited, so it does not fully meet the demand, as well as various environmental issues and animal protection movements initiated in Europe and other places. The supply and demand is gradually decreasing due to the spread of energy. Therefore, artificial leather with various patterns on its surface is widely used as a substitute.

Synthetic leather is usually manufactured by coating a thin fabric, knitted or nonwoven fabric with a synthetic resin such as polyurethane (PU) or polyvinyl chloride (PVC). In addition, it is widely used as a material for making bags and clothes.

However, PVC is always exposed to halogen gas, phthalate, and dioxin, and PU is also not free from hydrogen cyanide, DMF, formaldehyde, and MEK. In particular, PVC artificial leather generates hydrogen chloride gas during a fire, which is harmful to the human body, and also generates a lot of volatile organic compounds (VOCs), which is not environmentally friendly.

It is an object of the present invention to provide an eco-friendly and recyclable artificial leather manufacturing method.

Another object of the present invention is to provide a method for manufacturing an artificial leather useful as a lightweight material.

Another object of the present invention is to provide a method for manufacturing artificial leather having excellent abrasion resistance, scratch resistance, bending resistance, resilience and stain resistance.

1. According to one aspect, an artificial leather manufacturing method is provided. The artificial leather manufacturing method includes forming a first primer layer on a first thermoplastic polyolefin elastomer (TPO) layer, forming a printing layer on the first primer layer, and adhering a second TPO layer on the printing layer. It may include.

2. In 1 above, the second TPO layer may have an abrasion strength of 40,000 or more times measured under an 800gr load condition according to the Martindale method according to KS K ISO 12947-2.

3. In 1 or 2 above, the first TPO layer and the first primer layer may be in direct contact, and the first primer layer and the printing layer may directly contact each other.

4. In any one of the above 1 to 3, the printing layer and the second TPO layer may be in direct contact.

5. In any one of the above 1 to 3, in the step of adhering the second TPO layer on the printing layer, a second primer layer or a second adhesive layer is formed on the printing layer, and the second primer layer or the second adhesive layer is formed on the printing layer. 2 Adhering the second TPO layer on the adhesive layer, or forming a second primer layer or a second adhesive layer on the second TPO layer, and bonding the printing layer on the second primer layer or the second adhesive layer Including the step of, the printing layer and the second primer layer or the second adhesive layer may be in direct contact, the second primer layer or the second adhesive layer and the second TPO layer may be in direct contact.

6. In any one of the above 1 to 5, it may further include forming an acrylic or urethane-based surface protection layer on the second TPO layer.

7. In any one of the above 1 to 6, it may further include the step of forming an embossing on the surface of the second TPO layer.

8. In any one of 1 to 7 above, the first TPO layer may be a TPO foam layer.

9. In any one of the above 1 to 8, at least one of the first TPO layer and the second TPO layer is a hot melt adhesive resin, a filler, a reinforcing agent, a lubricant, a heat stabilizer, an antioxidant, a slip agent, a UV stabilizer, a colorant And one or more of processing aids.

10. In any one of the above 1 to 9, it may further include the step of adhering the first TPO layer and the fiber base layer.

11. In the above 10, the first TPO layer and the fiber base layer may directly contact.

12. In the above 10, the step of adhering the first TPO layer and the fiber base layer comprises forming a first adhesive layer on the first TPO layer, and bonding the fiber base layer on the first adhesive layer, or Forming a first adhesive layer on the fibrous substrate layer, and adhering the first TPO layer on the first adhesive layer, wherein the fibrous substrate layer and the first adhesive layer are in direct contact with each other, The first adhesive layer and the first TPO layer may be in direct contact.

13. In any one of the above 1 to 12, the artificial leather may have a bending resistance of 50,000 times or more, as measured according to KS M ISO 17694.

The present invention has the effect of providing an artificial leather manufacturing method that is eco-friendly, recyclable, and useful as a lightweight material, and has excellent abrasion resistance, scratch resistance, bending resistance, resilience and stain resistance.

In the present specification, expressions in the singular include plural expressions unless the context clearly indicates otherwise.

When the positional relationship of the two parts is described as'upper','upper','lower of','next to', etc., between the two parts unless'directly' or'direct' is used. One or more different parts may be located in the.

In the present specification, terms such as include or have means that a feature or component described in the specification is present, and does not preclude the possibility of adding one or more other features or components in advance.

Terms such as first and second used in the present specification may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another component.

In interpreting the constituent elements, it is interpreted as including an error range even if there is no explicit description.

In "a to b" representing a numerical range in the present specification, "to" is defined as ≥a and ≤b.

The method for manufacturing artificial leather according to an embodiment of the present invention comprises forming a first primer layer on a first thermoplastic polyolefin elastomer (TPO) layer, forming a printing layer on the first primer layer, and then on the printed layer. It may include the step of adhering the second TPO layer.

Hereinafter, each step will be described in more detail.

First, a first primer layer may be formed on the first TPO layer.

The first TPO layer may play a role in determining printability and overall emotional quality in artificial leather, and may be a film including a thermoplastic polyolefin (TPO). TPO is an eco-friendly material that has elasticity of rubber and thermoplasticity of plastic at the same time, and is advantageous in manufacturing artificial leather because of its excellent resilience, shock absorption, processability, workability, flexibility, stain resistance, light weight, and recycling. TPO may include an olefin-based resin and an olefin-based rubber, examples of the olefin-based resin include polyethylene (PE), polypropylene (PP), and the like, and examples of the olefin-based rubber include ethylene-propylene monomer (EPM). Rubber, ethylene-propylene-diene monomer (EPDM) rubber, and the like, but are not limited thereto. TPO can be classified into C-TPO (compound thermoplastic polyolefin) and R-TPO (reactor thermoplastic polyolefin) depending on the manufacturing method. C-TPO is manufactured through simple physical bonding, and R-TPO is made into metal in the reactor. It is prepared through a polymerization reaction using a metallocene catalyst or the like, and the first TPO layer may contain C-TPO, R-TPO, or both. For example, the first TPO layer may include PE and/or PP and C-TPO and/or R-TPO including EPM and/or EPDM.

According to one embodiment, the first TPO layer may be a TPO foam layer. In this case, the texture of the artificial leather may be softer. The TPO foaming layer may be prepared by mixing and foaming a foaming agent in the composition for forming the first TPO layer, but is not limited thereto.

According to an embodiment, the first TPO layer may have a multilayer structure in which two or more TPO layers are stacked. In this case, it may be easier to control the physical properties of the artificial leather.

According to one embodiment, the first TPO layer includes a hot melt adhesive resin, a filler, a reinforcing agent, a lubricant, a heat stabilizer, an antioxidant, a slip agent, a UV stabilizer, as needed, within a range that does not impair the object of the present invention in addition to the TPO. Colorants, processing aids, etc. may be included alone or in addition to two or more. These may be included in an amount of 0.1 to 30% by weight, for example, 0.1 to 15% by weight, based on the total weight of the first TPO layer, but the content may be changed as necessary.

The thickness of the first TPO layer is not particularly limited and may vary according to required physical properties. For example, if high softness is required, the thickness needs to be thin and the hardness needs to be low. On the contrary, if high hardness is required, the thickness needs to be thick and the hardness needs to be high. . According to one embodiment, the thickness of the first TPO layer may be 10 to 900 μm, and the softness and hardness of the artificial leather may be easily controlled within the above range, but is not limited thereto.

The manufacturing method of the first TPO layer is not particularly limited, but may be manufactured in the form of a film through, for example, a calendering process or a T-die extrusion process.

The first primer layer may improve adhesion between the first TPO layer and the printing layer. In general, since TPO is non-polar, it is difficult to attach a printed material on the first TPO layer, and even if a printed material is attached, there may be a problem that it is easily removed by external factors. However, when the first primer layer is formed between the first TPO layer and the printing layer, such as artificial leather according to an embodiment of the present invention, this problem can be solved.

The first primer layer may include a compound having polarity as a primer. For example, the first primer layer may include a chlorinated polyolefin-based primer or a polyurethane-based primer (eg, a one-component or two-component polyurethane-based primer). Examples of the chlorinated polyolefin-based primer include, but are not limited to, a chlorinated polypropylene (CPP) primer.

According to an embodiment, the first TPO layer and the first primer layer may be in direct contact. Here, "direct contact" may mean that no other layer is interposed between the first TPO layer and the first primer layer.

The thickness of the first primer layer is not particularly limited, but may be, for example, 3 to 100 μm, and sufficient adhesion between the first TPO layer and the printing layer may be provided within the above range.

The method of forming the first primer layer is not particularly limited, but may be formed by coating a primer on the first TPO layer, for example. As a coating method, various methods such as gravure coating, spray coating, and micro gravure coating can be used without limitation.

According to one embodiment, the step of forming the first primer layer may include coating and drying a chlorinated polyolefin-based primer or a polyurethane-based primer on the first TPO layer, wherein drying is performed at 60 to 150°C for 30 seconds to 2 It may be performed for a minute, but is not limited thereto.

Then, a printing layer may be formed on the first primer layer.

The printing layer can play an important role in finalizing the appearance of the artificial leather by giving a pattern to the artificial leather.

According to one embodiment, the printing layer may include an acrylic or urethane-based ink. In this case, due to the polarity of the acrylic or urethane-based ink, adhesion to the first primer layer including a chlorinated polyolefin-based primer or a polyurethane-based primer may be excellent.

The method of forming the printing layer is not particularly limited, but for example, a printout can be printed on the first primer layer using a gravure method, a real photo (digital print) method, a transfer method, etc., and the required resolution, print quality, etc. Accordingly, the printing method can be appropriately selected.

According to one embodiment, the first primer layer and the printing layer may be in direct contact.

Thereafter, the second TPO layer may be adhered to the printed layer.

The second TPO layer may protect printed matter, maintain transparency, improve visual quality, and impart surface durability of artificial leather. Also, if necessary, a color may be applied to the second TPO layer.

The second TPO layer may be a film containing TPO. For a description of the TPO, refer to the description of the TPO in the first TPO layer.

According to one embodiment, the second TPO layer may have a multilayer structure in which two or more TPO layers are stacked. In this case, by laminating TPO layers of different physical properties (for example, by providing a foam layer to a specific layer), it is possible to design artificial leather with new physical properties, so that it is easier to control the physical properties of the artificial leather.

According to one embodiment, in the second TPO layer, in addition to TPO, hot melt adhesive resins, fillers, reinforcing agents, lubricants, heat stabilizers, antioxidants, UV stabilizers, colorants, processing as needed within the scope of not impairing the object of the present invention. Formulations, etc. may be further included alone or in two or more. These may be included in an amount of 0.1 to 30% by weight, for example, 0.1 to 15% by weight, based on the total weight of the second TPO layer, but the content may be changed as necessary.

The thickness of the second TPO layer is not particularly limited and may vary according to required physical properties. For example, when high softness is required, the thickness needs to be thin and the hardness needs to be low. On the contrary, when high hardness is required, the thickness needs to be thick and the hardness needs to be high. According to one embodiment, the thickness of the second TPO layer may be 10 to 900 μm, and the softness and hardness of the artificial leather may be easily controlled within the above range, but is not limited thereto.

The method of manufacturing the second TPO layer is not particularly limited, but may be manufactured in the form of a film through, for example, a calendering process or a T-die extrusion process.

According to one embodiment, the second TPO layer may have a wear strength of 40,000 or more times measured under a load condition of 800gr according to the Martindale method according to KS K ISO 12947-2. The wear strength of the second TPO layer may be, for example, 50,000 times or more, another example, 60,000 times or more, another example, 70,000 times or more, another example, 80,000 times or more, but is not limited thereto.

The method of bonding the printed layer and the second TPO layer is not particularly limited. For example, after laminating the printed layer and the second TPO layer, compression bonding (eg, pressing at a pressure of 30 to 70 kgf) or thermocompression bonding (eg, pressing at a temperature of 150 to 200°C with a pressure of 30 to 70 kgf) Thus, the printed layer and the second TPO layer can be adhered.

According to one embodiment, the printing layer and the second TPO layer may be in direct contact.

For another example, by forming a second primer layer or a second adhesive layer on the printing layer and/or the second TPO layer, and adhering the second TPO layer and/or the printing layer on the second primer layer or the second adhesive layer. The printed layer and the second TPO layer may be adhered. Here, for a description of the second primer layer, refer to the description of the first primer layer.

As the adhesive used in forming the second adhesive layer, a known adhesive may be used without limitation within a range that does not impair the object of the present invention. According to one embodiment, a water-based adhesive or a solvent-free adhesive may be used as the adhesive in consideration of VOC and odor, and examples of the water-based adhesive include a water-dispersed two-component urethane-based adhesive, but are not limited thereto.

The thickness of the second primer layer or the second adhesive layer is not particularly limited, but may be, for example, 1 to 100 μm, and sufficient adhesion between the printing layer and the second TPO layer may be provided within the above range.

The method of forming the second primer layer or the second adhesive layer is not particularly limited, but may be formed, for example, by coating a primer or an adhesive on the printing layer and/or the second TPO layer. As a coating method, various methods such as gravure coating, spray coating, and micro gravure coating can be used without limitation.

According to one embodiment, the printing layer and the second primer layer or the second adhesive layer may be in direct contact, and the second primer layer or the second adhesive layer and the second TPO layer may be directly contacted.

According to one embodiment, it may further include forming an acrylic or urethane-based surface protection layer on the second TPO layer. In this case, scratch resistance may be improved and a matte effect may be exhibited by the surface protective layer. The method of forming the surface protective layer is not particularly limited, but may be formed by coating an acrylic or urethane-based coating agent for a surface protective layer on the second TPO layer using various methods such as gravure coating, spray coating, and micro gravure coating.

According to one embodiment, it may further include forming an embossing on the surface of the second TPO layer. In this case, a visual effect of texture may be expressed. The method of forming the embossing is not particularly limited, but may be formed by passing artificial leather including the second TPO layer through the embossing roll, for example.

According to one embodiment, the above-described artificial leather manufacturing method may further include bonding the first TPO layer and the fiber base layer.

As the fiber base layer, it is possible to use a material capable of showing appropriate mechanical properties while exhibiting similar sensibility to natural leather. Examples of the fiber base layer include woven fabrics, non-woven fabrics, and/or knitted fabrics made of natural fibers and/or synthetic fibers, and examples of natural fibers include cotton fibers, and examples of synthetic fibers include nylon fibers and rayon Fiber, polyester fiber, blended fiber, and the like, but are not limited thereto.

Specifications such as the thickness of the fiber base layer are not particularly limited and may vary according to required physical properties. According to one embodiment, the thickness of the fiber base layer may be 0.2 to 3 mm, for example, 0.3 to 2.0 mm, and the volume and leather touch may be excellent in the above range, but is not limited thereto.

The order of bonding between the first TPO layer and the fiber base layer is not particularly limited. For example, the first TPO layer and the fiber base layer may be performed before forming the first primer layer on the first TPO layer or after adhering the second TPO layer on the printing layer.

The method of bonding the first TPO layer and the fiber base layer is not particularly limited. For example, after laminating the first TPO layer and the fiber base layer, the first TPO is compressed (for example, compressed at a pressure of 30 to 70 kgf) or thermocompressed (compressed at a temperature of 150 to 200°C with a pressure of 30 to 70 kgf). The layer and the fiber base layer can be bonded together.

According to one embodiment, the first TPO layer and the fiber base layer may be in direct contact.

As another example, a first adhesive layer is formed on the first TPO layer and/or the fibrous substrate layer, and the fibrous substrate layer and/or the first TPO layer is adhered on the first adhesive layer to form the first TPO layer and the fibrous substrate layer. Can be glued.

As the adhesive used in forming the first adhesive layer, a known adhesive may be used without limitation within a range that does not impair the object of the present invention. According to one embodiment, a water-based adhesive or a solvent-free adhesive may be used as the adhesive in consideration of VOC and odor, and examples of the water-based adhesive include a water-dispersed two-component urethane-based adhesive, but are not limited thereto.

The thickness of the first adhesive layer is not particularly limited, but may be, for example, 1 to 100 μm, and sufficient adhesion between the fiber base layer and the first TPO layer may be provided within the above range.

The method of forming the first adhesive layer is not particularly limited, but may be formed by coating an adhesive on the first TPO layer and/or the fiber base layer, for example. As a coating method, various methods such as gravure coating, spray coating, and micro gravure coating can be used without limitation.

According to one embodiment, the fiber base layer and the first adhesive layer may be in direct contact, and the first adhesive layer and the first TPO layer may be directly contacted.

According to an embodiment of the present invention, the artificial leather manufacturing method comprises forming a first primer layer on the surface of the first TPO layer, forming a printing layer on the first primer layer, and forming a second TPO layer on the printing layer. It may be prepared, including the step of adhering the fiber base layer on the back surface of the first TPO layer. For example, forming a first primer layer by coating a primer on the surface of the first TPO layer in the form of a film; Attaching a printed material on the first primer layer using a gravure method, a photorealistic (digital print) method, a transfer method, or the like to form a printing layer; Laminating a second TPO layer in the form of a film on the printed layer, followed by pressure bonding or thermocompression bonding, or applying a primer or an adhesive on the printed layer and/or the second TPO layer, and then laminating and bonding the printed layer and the second TPO layer; In addition, after laminating the fiber base layer on the back side of the first TPO layer and then pressing or thermocompression bonding, or after applying an adhesive on the back side of the first TPO layer and/or the fiber base layer, the back side of the first TPO layer and the fiber base layer may be laminated and adhered. have. Optionally, it may further include forming a surface protective layer by coating a coating agent for a surface protective layer, for example, an acrylic or urethane-based coating agent on the second TPO layer. In addition, optionally, it may further include the step of forming an embossing on the surface of the second TPO layer, for example, the above-described fiber base layer / (first adhesive layer) / first TPO layer / first primer layer / printing layer / An artificial leather including (second primer layer or second adhesive layer)/second TPO layer/(surface protection layer) may be passed through an embossing roll to form embossing on the surface of the second TPO layer.

According to another embodiment, in the artificial leather manufacturing method, a first TPO layer is adhered on a fiber base layer, a first primer layer is formed on the first TPO layer, and a printing layer is formed on the first primer layer, It may be prepared including the step of adhering a second TPO layer on the printing layer. For example, after laminating the first TPO layer in the form of a film on the fibrous substrate layer and then press-bonding or thermocompression bonding, or after applying an adhesive on the fibrous substrate layer and/or the first TPO layer, the fibrous substrate layer and the first TPO layer are laminated. To adhere; Forming a first primer layer by coating a primer on the first TPO layer; Attaching a printed material on the first primer layer using a gravure method, a photorealistic (digital print) method, a transfer method, or the like to form a printing layer; In addition, after laminating a second TPO layer in the form of a film on the printing layer, pressing or thermocompression bonding, or applying a primer or an adhesive on the printing layer and/or the second TPO layer, and then laminating the printing layer and the second TPO layer to be bonded. I can. Optionally, it may further include forming a surface protective layer by coating a coating agent for a surface protective layer, for example, an acrylic or urethane-based coating agent on the second TPO layer. In addition, optionally, it may further include the step of forming an embossing on the surface of the second TPO layer, for example, the above-described fiber base layer / (first adhesive layer) / first TPO layer / first primer layer / printing layer / An artificial leather including (second primer layer or second adhesive layer)/second TPO layer/(surface protection layer) may be passed through an embossing roll to form embossing on the surface of the second TPO layer.

According to one embodiment, the artificial leather manufactured by the above-described artificial leather manufacturing method may have a bending resistance measured according to KS M ISO 17694 of 50,000 or more. The degree of curvature of the artificial leather manufactured by the above-described artificial leather manufacturing method may be, for example, 60,000 or more, another example, 70,000 or more, and another example, 80,000 or more, but is not limited thereto.

Artificial leather manufactured by the above-described artificial leather manufacturing method is eco-friendly, effective in reducing VOC, and is useful as a lightweight material due to its low specific gravity, excellent moldability, abrasion resistance, bending resistance, contamination resistance, etc., and outer skins of bags and shoes. , Sofa, table, furniture exterior finishing, flooring, car interior materials, etc. can be used usefully.

Hereinafter, the present invention will be described in more detail with reference to examples. However, this has been presented as a preferred example of the present invention, and it cannot be construed as limiting the present invention in any sense.

Example

Example 1

First, the melt-flow index (MI) measured according to ASTM D1238 is 1g/10min (190°C, 2.16kg), the Shore A hardness measured according to ASTM D2240 is 76, and the thickness is 180㎛. A first primer layer was formed by coating and drying a primer (JR-650, Jinkwang) on a TPO film for a substrate layer (Hanwha Solutions) in a gravure method (chamber temperature: about 80°C, speed: about 15m/min). Thereafter, a printing layer was formed on the first primer layer in a gravure method (chamber temperature: about 100°C, speed: about 15m/min). Then, a TPO film for a surface layer with a MI of 3g/10min (190℃, 2.16kg) measured according to ASTM D1238, a Shore A hardness of 75, and a thickness of 100㎛ measured according to ASTM D2240 (Hanwha Solutions Co., Ltd.) On top of the gravure method (chamber temperature: about 80℃, speed: about 10m/min), an adhesive (KW-100, Heungin Chemical Co., Ltd.) was coated and bonded to the printing layer, aging at about 60℃ for 24 hours, and then the embossing process. (Temperature: about 180°C, pressure: about 50kgf) to produce artificial leather.

Example 2

As a TPO film for the surface layer, a TPO film with a MI of 1g/10min (190℃, 2.16kg) measured according to ASTM D1238, a Shore A hardness of 75, and a thickness of 100㎛ measured according to ASTM D2240 (Hanwha Solutions Co., Ltd.) Except for using ), artificial leather was manufactured using the same method as in Example 1.

Comparative Example 1

Instead of attaching the TPO film for the surface layer on the printed layer, a urethane-based surface layer is formed in a gravure method (chamber temperature: about 100℃, speed: about 15m/min) using a liquid urethane coating agent (KU-904, Heungin Chemical Co., Ltd.) Except for one, artificial leather was manufactured using the same method as in Example 1.

Comparative Example 2

Instead of adhering the TPO film for the surface layer on the printed layer, an acrylic surface layer is formed in a gravure method (chamber temperature: about 100℃, speed: about 15m/min) using a liquid acrylic coating agent (KA-160, Heungin Chemical Co., Ltd.) Except for one, artificial leather was manufactured using the same method as in Example 1.

Comparative Example 3

Instead of adhering the TPO film for the surface layer on the printing layer, the gravure method (2 times a liquid urethane-based coating agent (KU-904, Heungin Chemical Co.) and two times a liquid acrylic coating agent (KA-160, Heungin Chemical Co., Ltd.) An artificial leather was manufactured in the same manner as in Example 1, except that a urethane-based/acrylic-based surface layer was formed at a chamber temperature: about 100° C., a speed: about 15 m/min).

Comparative Example 4

Instead of attaching the TPO film for the surface layer on the printing layer, a liquid two-component type urethane coating agent (KW-328, Heungin Chemical Co., Ltd.) is used to achieve a gravure method (chamber temperature: about 150℃, speed: about 10m/min). An artificial leather was manufactured using the same method as in Example 1, except that a urethane-based surface layer was formed.

Comparative Example 5

An artificial leather was prepared in the same manner as in Example 1, except that a TPU film (T-MAX, SKF Corporation) was adhered instead of the TPO film for the surface layer on the printed layer.

The manufactured artificial leather was evaluated for physical properties as follows, and the results are shown in Table 1 below.

Property evaluation method

(1) Abrasion resistance (unit: times): In accordance with the KS K ISO 12947-2 standard, the abrasion strength of the artificial leather surface was measured under 800gr load condition according to the Martindale method.

(2) Flexural resistance (unit: times): According to KS M ISO 17694: 2004, the number of reciprocating bends before the occurrence of lifting or cracking of the surface of artificial leather at room temperature using a flexural strength test apparatus (bending resistance) Was measured.

(3) Touch Feel: Through the tactile test, if the artificial leather is soft and has excellent elasticity, it is marked as O, if it is not, X, and △ if it is not satisfactory but available.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Wear resistance (times) 80,000 or more 80,000 or more 8,200 7,500 15,900 19,800 35,000 Flexibility (times) 80,000 or more 80,000 or more 35,000 20,500 18,000 8,200 45,000 Touch Feel O O O X X X △

As can be seen from Table 1 above, the artificial leather of Example 1-2 manufactured by the manufacturing method of the present invention has superior abrasion resistance, bending resistance, and touch feel compared to the artificial leather of Comparative Example 1-4 that is not otherwise. Can be seen.

So far, the present invention has been looked at around the examples. Those of ordinary skill in the art to which the present invention pertains will be able to understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the above description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (13)

Forming a first primer layer on the first TPO (thermoplastic polyolefin elastomer) layer,
Forming a printing layer on the first primer layer, and
Comprising the step of adhering a second TPO layer on the printing layer, artificial leather manufacturing method.
The method of claim 1,
The second TPO layer has an abrasion strength of 40,000 or more times measured under 800gr load condition according to the Martindale method according to KS K ISO 12947-2.
The method of claim 1,
The first TPO layer and the first primer layer are in direct contact,
The artificial leather manufacturing method in which the first primer layer and the printing layer are in direct contact.
The method of claim 1,
The method of manufacturing artificial leather in which the printing layer and the second TPO layer are in direct contact.
The method of claim 1,
The step of adhering the second TPO layer on the printing layer,
Forming a second primer layer or a second adhesive layer on the printing layer, and bonding the second TPO layer on the second primer layer or the second adhesive layer, or
Forming a second primer layer or a second adhesive layer on the second TPO layer, and adhering the printing layer on the second primer layer or the second adhesive layer,
The printing layer and the second primer layer or the second adhesive layer are in direct contact,
The method of manufacturing artificial leather in which the second primer layer or the second adhesive layer and the second TPO layer are in direct contact.
The method of claim 1,
Further comprising the step of forming an acrylic or urethane-based surface protection layer on the second TPO layer, artificial leather manufacturing method.
The method of claim 1,
Further comprising the step of forming an embossing on the surface of the second TPO layer, artificial leather manufacturing method.
The method of claim 1,
The first TPO layer is a TPO foam layer, artificial leather manufacturing method.
The method of claim 1,
At least one of the first TPO layer and the second TPO layer is one or more of a hot melt adhesive resin, a filler, a reinforcing agent, a lubricant, a heat stabilizer, an antioxidant, a slip agent, a UV stabilizer, a colorant, and a processing aid. That further comprises, artificial leather manufacturing method.
The method of claim 1,
Further comprising the step of bonding the first TPO layer and the fiber base layer, artificial leather manufacturing method.
The method of claim 10,
The first TPO layer and the fiber base layer in direct contact, artificial leather manufacturing method.
The method of claim 10,
The step of adhering the first TPO layer and the fiber base layer,
Forming a first adhesive layer on the first TPO layer, and bonding the fiber base layer on the first adhesive layer, or
Forming a first adhesive layer on the fiber base layer and adhering the first TPO layer on the first adhesive layer,
The fiber base layer and the first adhesive layer are in direct contact,
The artificial leather manufacturing method in which the first adhesive layer and the first TPO layer are in direct contact.
The method of claim 1,
The artificial leather has a bending resistance of 50,000 times or more measured according to KS M ISO 17694, artificial leather manufacturing method.