KR102223124B1 - Eco-friendly adhesive and manufacturing method of automobile interior materials using them - Google Patents

Abstract

The present invention relates to an eco-friendly adhesive composition which consists of a polyamide hot melt adhesive manufactured by reacting dimer acid, vegetable oil fatty acid, aliphatic dicarboxylic acid, poly(oxypropylene) diamine, aliphatic linear diamine, and aliphatic cyclic diamine, and in which a softening point measured by the standard of ASTM E28 is 95 to 120°C. A manufacturing method of an interior material for an automobile using the eco-friendly adhesive composition according to an aspect of the present invention comprises the steps of: preparing the eco-friendly adhesive composition; putting the eco-friendly adhesive composition into an extrusion means having a discharge port at the tip and heating and extruding the eco-friendly adhesive composition to discharge the same through the discharge port; preparing a cushion fabric and placing the cushion fabric on a fabric holder; melting the eco-friendly adhesive composition using the extrusion means; forming an adhesive layer by applying the molten eco-friendly adhesive composition to one side of the cushion fabric using an applicator; cooling the cushion fabric on which the adhesive layer is formed to manufacture a semi-finished product; laminating a skin fabric on one side of the semi-finished product and heat-pressing the same; and cooling the semi-finished product on which the skin fabric is laminated to complete the interior material.

Description

Eco-friendly adhesive composition and manufacturing method of automotive interior materials using the same {ECO-FRIENDLY ADHESIVE AND MANUFACTURING METHOD OF AUTOMOBILE INTERIOR MATERIALS USING THEM}

The present invention relates to an eco-friendly adhesive composition and a method of manufacturing an interior material for automobiles using the same.

Adhesive materials such as hot melt adhesives, pressure-sensitive adhesives, sealants, coatings, and paints are used in various industries such as civil engineering and construction, packaging, bookbinding, automobile, electronics, precision, optical products, woodworking, plywood, textiles, leather, etc., as well as general home use. It is used in a wide range of fields, including wood, metal, rubber, plastics, leather, ceramics, etc. as materials to be bonded, and can be applied to concrete in recent years, so its use is expanding in the overall field of industry. .

Hot-melt adhesives, which are representative of adhesives, were developed in DuPont in the US in the 1960s, and are bonded by heating and melting as a resin alone or a 100% solid mixed with other materials based on a thermoplastic resin. , Is attracting attention as a pollution-free adhesive. The composition of the hot melt adhesive is mostly ethylene vinylacetate (EVA), and polyester, thermoplastic epoxy, polyamide, polyurethane, and the like are used.

However, the hot melt adhesive according to the prior art has a high melting point and softening point, making it difficult to use for materials such as natural leather, artificial leather and polyurethane foam for automobile interiors that require low temperature work. Although the development of an improved hot melt adhesive has been made, the hot melt adhesive with improved low temperature workability according to the prior art has a problem that the low temperature workability is secured, but the adhesive strength is lowered.

Accordingly, it is necessary to develop a hot melt adhesive having good adhesion strength while securing low temperature workability so that it can be used for interior materials for automobiles such as natural leather, artificial leather and polyurethane foam.

Registered Korean Patent Publication No. 10-2002940, July 17, 2019 Korean Patent Application Publication No. 10-2016-0142427, published on December 13, 2016

An object of the present invention is to solve the above problems, an eco-friendly adhesive having good adhesion strength while securing low-temperature workability so that it can be used for interior materials for automobiles such as natural leather, artificial leather and polyurethane foam that require low-temperature work. An object thereof is to provide a composition and a method of manufacturing an interior material for automobiles using the composition.

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned will be clearly understood from the following description.

In order to achieve the above object, the eco-friendly adhesive composition according to one aspect of the present invention is prepared by reacting dimer acid, vegetable oil fatty acid, aliphatic dicarboxylic acid, poly(oxypropylene) diamine, aliphatic linear diamine, and alicyclic diamine. It is made of a polyamide hot melt adhesive, characterized in that the softening point measured by the standard of ASTM E28 95 to 120 ℃.

In the method of manufacturing an interior material for automobiles using an eco-friendly adhesive composition according to an aspect of the present invention, an eco-friendly adhesive composition is prepared in the step of preparing an eco-friendly adhesive composition, a discharge port is provided at the tip, and an eco-friendly adhesive composition is heated and extruded and discharged to the discharge port. Putting in, preparing the cushion fabric and placing the cushion fabric on the fabric holder, melting the eco-friendly adhesive composition using an extrusion means, and applying the melted eco-friendly adhesive composition to one side of the cushion fabric using the applicator. Including the steps of forming an adhesive layer, manufacturing a semi-finished product by cooling the cushion fabric on which the adhesive layer is formed, laminating an epidermal fabric on one side of the semi-finished product and heat-pressing it, and cooling the semi-finished product on which the skin fabric is laminated to complete the interior do.

delete

The eco-friendly adhesive composition according to embodiments of the present invention having the above configuration and a method of manufacturing an interior material for automobiles using the same can expect the following effects.

It can be used for adhesion between automotive interior materials such as natural leather, artificial leather and polyurethane foam while securing low-temperature workability, and it is eco-friendly because there is no volatilization of organic solvents as it does not contain any solvents. There is an advantage.

As the automotive interior material is manufactured using the above-described eco-friendly adhesive composition, it is possible to manufacture the automotive interior material at a low temperature, thereby minimizing damage to the cushion fabric and the skin fabric due to heat, thereby manufacturing the automotive interior material.

In addition, since organic solvents are not included in the eco-friendly adhesive composition, the safety and workability of workers are improved when manufacturing interior materials for automobiles, and the manufactured interior materials for automobiles can be applied to automobiles without the risk of volatilization of organic solvents. have.

1 is a cross-sectional view of an interior material for a vehicle manufactured using an eco-friendly adhesive composition according to an aspect of the present invention.
2 is a photograph of an interior material for a vehicle manufactured according to a method of manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to an embodiment of the present invention.
3 is a flow chart showing the sequence of a method of manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to an aspect of the present invention.
4 is a flow chart showing a sequence of steps of forming an adhesive layer in a method of manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to an embodiment of the present invention.
5 is a flow chart showing a sequence of cooling steps in a method for manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to an embodiment of the present invention.
6 is a block diagram of an apparatus for manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention. On the other hand, terms used in the present specification are for describing exemplary embodiments, and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase.

Hereinafter, an eco-friendly adhesive composition according to embodiments of the present invention and a method and a manufacturing apparatus for manufacturing a vehicle interior material using the same will be described with reference to the drawings.

The eco-friendly adhesive composition according to an embodiment of the present invention comprises a polyamide hot melt adhesive prepared by reacting dimer acid, vegetable oil fatty acid, aliphatic dicarboxylic acid, poly(oxypropylene) diamine, aliphatic linear diamine and alicyclic diamine. It may be, preferably a dimer acid, a vegetable oil fatty acid, an aliphatic dicarboxylic acid and a polyamide hot melt adhesive prepared by reacting a diamine.

The dimer acid may be mixed in 40 to 60 parts by weight when preparing the polyamide hot melt adhesive included in the eco-friendly adhesive composition according to an embodiment of the present invention.

The dimer acid may be obtained from at least one selected from vegetable oil fatty acids and animal oil fatty acids.

Here, the vegetable oil fatty acid is selected from soybean fatty acid, rapeseed fatty acid, canola oil fatty acid, safflower seed oil fatty acid, sunflower oil fatty acid, flax oil fatty acid, cottonseed fatty acid, ox belly fatty acid, microliquid embryo fatty acid, bran fatty acid, palm oil fatty acid, coconut fatty acid and tall oil fatty acid. It may be to include at least one of.

In addition, the animal oil fatty acid may include at least one selected from tallow fatty acid, pork fat fatty acid, and fish oil fatty acid.

Preferably, the dimer acid may be obtained from vegetable oil fatty acids, more preferably from tall oil fatty acid (TOFA).

The vegetable oil fatty acid may be mixed in 1 to 3 parts by weight when preparing the polyamide hot melt adhesive included in the eco-friendly adhesive composition according to an embodiment of the present invention.

The vegetable oil fatty acid may be mixed so that the eco-friendly adhesive composition according to an embodiment of the present invention has flowability at a low temperature when the eco-friendly adhesive composition according to an embodiment of the present invention is heated.

Vegetable oil fatty acids are at least selected from soybean fatty acid, rapeseed fatty acid, canola oil fatty acid, safflower seed oil fatty acid, sunflower oil fatty acid, flax oil fatty acid, cottonseed fatty acid, ox belly fatty acid, microliquid embryo fatty acid, bran fatty acid, palm oil fatty acid, coconut fatty acid and tall oil fatty acid. It may be one containing one, preferably may be a tall oil fatty acid.

When the blending amount of vegetable oil fatty acid is less than 1 part by weight, gelation of the eco-friendly adhesive composition according to an embodiment of the present invention occurs, and when the eco-friendly adhesive composition is heated, it does not exhibit flow at a low temperature, so that low-temperature workability is required. It may be difficult to use in the manufacture of

When the blending amount of the vegetable oil fatty acid exceeds 3 parts by weight, flowability may be excessive when the eco-friendly adhesive composition according to an embodiment of the present invention is heated, resulting in poor workability when manufacturing an interior material for automobiles.

Poly(oxypropylene)diamine may be mixed in an amount of 25 to 35 parts by weight when preparing the polyamide hot melt adhesive included in the eco-friendly adhesive composition according to an embodiment of the present invention.

If the blending amount of poly(oxypropylene)diamine is less than 25 parts by weight, the softening point of the eco-friendly adhesive composition according to an embodiment of the present invention may be too low, and if it exceeds 35 parts by weight, the environment-friendly environment according to an embodiment of the present invention The softening point and viscosity of the adhesive composition may be excessively high.

In addition, when the mixing amount of poly(oxypropylene)diamine exceeds 35 parts by weight, the viscosity of the eco-friendly adhesive composition according to an embodiment of the present invention is too high, so that the eco-friendly adhesive composition may not be smoothly applied.

Poly(oxypropylene)diamine may be represented by Formula 1 below.

In Formula 1, n may be an average degree of polymerization of poly(oxypropylene)diamine, may be a natural number of 25 to 40, and preferably may be a natural number of 30 to 35.

Here, when n is less than 25, the softening point of the eco-friendly adhesive composition according to an embodiment of the present invention may be too high to ensure low-temperature workability, and when n exceeds 40, the eco-friendly adhesive composition according to an embodiment of the present invention The softening point of may be too low.

Aliphatic cyclic diamine is mixed with 2 to 7 parts by weight to improve the adhesion of the eco-friendly adhesive composition according to an embodiment of the present invention when preparing the polyamide hot melt adhesive contained in the eco-friendly adhesive composition according to an embodiment of the present invention. Can be.

The aliphatic cyclic diamine may include a piperazine derivative, preferably piperazine.

The aliphatic linear diamine is mixed with 8 to 15 parts by weight to control the softening point of the eco-friendly adhesive composition according to an embodiment of the present invention when preparing the polyamide hot melt adhesive contained in the eco-friendly adhesive composition according to an embodiment of the present invention. I can.

The aliphatic linear diamine may be a compound represented by Formula 2 below.

In Formula 1, R ₁ may be C _4-8 linear or branched alkylene.

Preferably, the aliphatic linear diamine may be hexamethylenediamine.

The aliphatic dicarboxylic acid may be mixed in 3 to 8 parts by weight when preparing the polyamide hot melt adhesive included in the eco-friendly adhesive composition according to an embodiment of the present invention.

The aliphatic dicarboxylic acid may be mixed to adjust the softening point of the eco-friendly adhesive composition according to an embodiment of the present invention.

If the amount of aliphatic dicarboxylic acid is less than 3 parts by weight or more than 8 parts by weight, the softening point of the eco-friendly adhesive composition according to an embodiment of the present invention is too low or too high. Heat resistance may be poor or low temperature workability may not be secured.

(Wherein, R ₂ is C _4-5 straight or branched alkylene)

The aliphatic dicarboxylic acid may include adipic acid, preferably adipic acid.

The eco-friendly adhesive composition according to an embodiment of the present invention is an antifoaming agent, an adhesion promoter, and an antioxidant together with dimer acid, vegetable oil fatty acid, aliphatic dicarboxylic acid, poly(oxypropylene) diamine, alicyclic diamine and aliphatic linear diamine. It may be prepared by further reacting.

The antifoaming agent may be mixed in an amount of 0.1 to 0.2 parts by weight in order to remove bubbles generated during manufacture of the eco-friendly adhesive composition according to an embodiment of the present invention.

The adhesion promoter may be mixed in an amount of 2 to 5 parts by weight in order to improve the adhesion of the eco-friendly adhesive composition according to an embodiment of the present invention.

The adhesion promoter may be phosphate ester acrylate.

The antioxidant may be mixed in an amount of 0.1 to 0.5 parts by weight to prevent oxidation of the eco-friendly adhesive composition according to an embodiment of the present invention.

A method of manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to another embodiment of the present invention relates to a method of manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to an embodiment of the present invention. 'Adhesive','adhesive composition' and'eco-friendly adhesive composition' described in the manufacturing method of an interior material for automobiles using an eco-friendly adhesive composition according to the example refers to an eco-friendly adhesive composition according to an embodiment of the present invention, even if not specifically mentioned.

A method of manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to another embodiment of the present invention is performed by an apparatus 20 for manufacturing an interior material for a vehicle using an eco-friendly adhesive composition according to another embodiment of the present invention shown in FIG. 6. It can be.

Referring to FIG. 6, the automobile interior material manufacturing apparatus 20 includes a fabric mounting part 100, an adhesive extruding part 200, an application part 300, a first cooling part 400, a winding part 500, and pressing It includes a part 600, a second cooling part 700, and an interior material winding part 800.

The manufacturing method of an interior material for a vehicle using an eco-friendly adhesive composition according to another embodiment of the present invention includes an adhesive preparation step (S100), an adhesive layer formation step (S200), a cooling step (S300), a compression step (S400), and an interior material completion step ( S500) may be included.

First, an eco-friendly adhesive composition is prepared (S100).

The adhesive preparation step (S100) may be to prepare an eco-friendly adhesive composition according to an embodiment of the present invention.

The adhesive preparation step S100 may be to prepare an eco-friendly adhesive composition in the form of small particles.

The adhesive preparation step (S100) may be to prepare an eco-friendly adhesive composition in the form of small particles and put it into the adhesive extruder 200.

The adhesive extruding unit 200 may include an input hopper 210 and an extruding means 220.

The adhesive preparation step (S100) may be to prepare an eco-friendly adhesive composition in the form of small particles and put it into the input hopper 210 provided at the rear end of the extrusion means 220.

The input hopper 210 may supply the injected eco-friendly adhesive composition to the extrusion means 220.

The cushion fabric 11 is prepared and the eco-friendly adhesive composition prepared in the adhesive preparation step (S100) is melted and uniformly applied to one surface of the cushion fabric 11 to form the adhesive layer 12 (S200).

The adhesive layer forming step (S200) may include a fabric preparation step (S210), a melting step (S220), and an application step (S230).

Fabric preparation step (S210) may be to prepare the cushion fabric (11).

Fabric preparation step (S210) may be to prepare the cushion fabric 11 wound in the form of a roll.

The fabric preparation step (S210) may be to prepare the cushion fabric 11 wound in a roll form and place the prepared cushion fabric 11 on the fabric holder 100.

The fabric holding part 100 may be to unwind the mounted cushion fabric 11 and transfer it to the winding part 500.

The cushion fabric 11 prepared in the fabric preparation step (S210) may be composed of at least one selected from a nonwoven fabric and a sponge commonly used for interior materials for automobiles, for example, selected from natural materials and synthetic materials. It may be composed of at least one selected from among at least one nonwoven fabric and a sponge.

The cushion fabric 11 prepared in the fabric preparation step (S210) may be composed of at least one of a nonwoven fabric and a sponge made of at least one material selected from polyethylene, polyamide, polyester, and polyurethane. It may be composed of at least one selected from ester nonwoven fabric and polyurethane sponge.

The melting step (S220) may be a step of melting the eco-friendly adhesive composition prepared in the adhesive preparation step (S100).

Melting step (S220) may be a step of melting by heating the eco-friendly adhesive composition prepared in the adhesive preparation step (S100) to 130 to 160 ℃.

In the melting step (S220), if the heating temperature of the eco-friendly adhesive composition is less than 130°C, the eco-friendly adhesive composition may not be melt-extruded, and when it exceeds 160°C, the viscosity of the melted eco-friendly adhesive composition falls excessively and the application step (S230) to be described later. It may be difficult to uniformly apply the eco-friendly adhesive composition in.

The adhesive extruding unit 200 may be an eco-friendly adhesive composition prepared in the adhesive preparation step (S100) is injected, and the injected eco-friendly adhesive composition is heated and extruded to discharge the melted eco-friendly adhesive composition.

The adhesive extruding part 200 may be provided between the fabric mounting part 100 and the winding part 500.

Melting step (S220) may be melting by heating the eco-friendly adhesive composition to 130 to 160 ℃ using the extrusion means (220).

The extrusion means 220 may be to discharge the melted eco-friendly adhesive composition by extruding the eco-friendly adhesive composition supplied from the input hopper 210 by heating at 130 to 160°C.

An outlet 221 for discharging the melted eco-friendly adhesive composition may be formed at the tip of the extrusion means 220.

The extrusion means 220 may be provided with a plurality of heating chambers at predetermined intervals from the inner rear end to the front end to gradually heat the eco-friendly adhesive composition supplied from the input hopper 210 to a high temperature from the rear end to the front end.

Extrusion means 220, but gradually heating the eco-friendly adhesive composition to a high temperature from the rear end to the front end, it may be to melt the eco-friendly adhesive composition by heating the eco-friendly adhesive composition at 130 to 160 ℃ from the front end.

When the extruding means 220 heats the eco-friendly adhesive composition supplied from the input hopper 210 to a high temperature gradually from the rear end to the front end, the eco-friendly adhesive composition does not rapidly melt at the front end of the extrusion means 220 so that it is melted through the outlet. When discharging the eco-friendly adhesive composition, the eco-friendly adhesive composition can be discharged smoothly without flowing backwards.

The melting step (S220) may be a step of melting the eco-friendly adhesive composition while gradually increasing the temperature from the rear end to the front end of the extrusion means using an extrusion means.

The application step (S230) may be a step of forming the adhesive layer 12 by uniformly applying the eco-friendly adhesive composition melted in the melting step (S220) to one surface of the cushion fabric 11 prepared in the fabric preparation step (S210). .

In the application step (S230), the melted eco-friendly adhesive composition discharged from the adhesive extruding unit 200 is uniformly applied to one side of the cushion fabric 11 prepared in the fabric preparation step (S210) using the application unit 300 It may be a step of forming the adhesive layer 12.

The applicator 300 is provided between the fabric mounting part 100 and the winding part 500 to transfer the melted eco-friendly adhesive composition discharged from the adhesive extruding part 200 from the fabric mounting part 100 to the cushion fabric 11 ) May be uniformly applied to one side of the surface to form the adhesive layer 12.

The adhesive extruding unit 200 may be to supply the melted eco-friendly adhesive composition to the application unit 300 by discharging the molten eco-friendly adhesive composition, and may be provided on the upper side of the application unit 300 for this purpose.

The applicator 300 may be provided on the side of the distal outlet 221 of the extruding means 220 to receive the molten eco-friendly adhesive composition discharged from the adhesive extruding unit 200.

The coating unit 300 may include a coating roller 310, a compression roller 320, and a scraper roller 330.

The coating roller 310 may be provided on the side of the distal outlet 221 of the extrusion means 220 to receive the molten eco-friendly adhesive composition discharged from the adhesive extruding unit 200 and apply it to one surface of the cushion fabric 11. have.

The coating roller 310 may be positioned so that the lower surface faces one surface of the cushion fabric 11.

The coating roller 310 is provided on the side of the distal outlet 221 of the extruding means 220 and is supplied with the melted eco-friendly adhesive composition discharged from the adhesive extruding unit 200 and is an eco-friendly adhesive composition until it is applied to the cushion fabric 11. The surface temperature may be 130 to 160°C to maintain the molten state.

The coating roller 310 may be supplied with the melted eco-friendly adhesive composition on the upper surface and rotated in one direction to apply the eco-friendly adhesive composition to one surface of the cushion fabric 11.

In the application step (S230), when the eco-friendly adhesive composition melted in the melting step (S220) is applied to one side of the cushion fabric 11 prepared in the fabric preparation step (S210), the eco-friendly adhesive composition is It may be applied while pressing the cushion fabric 11 using the applicator 300 to prevent excessive inflow.

The application unit 300 is a compression roller that is provided at a predetermined interval from the lower portion of the coating roller 310 so that the eco-friendly adhesive composition can be applied while pressing the cushion fabric 11 so that the upper surface contacts the other surface of the cushion fabric 11 It may include (320).

The compression roller 320 may be spaced apart from the lower portion of the coating roller 310 by a distance corresponding to 50 to 70% of the thickness of the cushion fabric 11 to compress the cushion fabric 11.

If the gap between the application roller 310 and the compression roller 320 is less than 50% of the thickness of the cushion fabric 11, the gap is too narrow and the cushion fabric 11 is excessively compressed and elastic recovery may take too long. Since the pressure applied to the cushion fabric 11 is strong, the cushion fabric 11 may be damaged.

If the gap formed between the application roller 310 and the compression roller 320 exceeds 70% of the thickness of the cushion fabric 11, the cushion fabric 11 is not sufficiently compressed and is applied to one side of the cushion fabric 11 Since the eco-friendly adhesive composition does not penetrate into the cushion fabric 11, the eco-friendly adhesive composition may not be sufficiently applied to one side of the cushion fabric 11.

That is, if the distance formed between the coating roller 310 and the compression roller 320 is 50 to 70% of the thickness of the cushion fabric 11, the cushion is formed at the distance formed between the coating roller 310 and the compression roller 320. As the fabric 11 passes, the cushion fabric 11 is sufficiently compressed so that the eco-friendly adhesive composition does not penetrate into the cushion fabric 11 without excessive penetration, and is sufficiently applied to one side to increase the adhesion with the skin fabric 13.

As the cushion fabric 11 passes through a predetermined distance formed between the coating roller 310 and the compression roller 320, the cushion fabric 11 can be compressed, and the adhesive layer 12 on one side of the cushion fabric 11 ) Can be formed.

The scraper roller 330 may be provided spaced apart from one side of the coating roller 310 at a predetermined interval, and when the coating roller 310 rotates in one direction, the scraper roller 330 rotates in the other direction and is supplied to the upper surface of the coating roller 310. A predetermined amount of the eco-friendly adhesive composition may be pushed upward to form a film (A) made of an eco-friendly adhesive composition and having a uniform thickness under the coating roller 310.

As the film A and the cushion fabric 11 come into contact on the lower surface of the coating roller 310, an adhesive layer 12 may be formed on one surface of the cushion fabric 11.

That is, as the scraper roller 330 is made of an eco-friendly adhesive composition under the coating roller 310 and forms a film (A) having a uniform thickness, an adhesive layer having a uniform thickness on one side of the cushion fabric 11 (12) can be formed.

The scraper roller 330 may be movable in the left and right directions so as to adjust the spacing formed between the coating rollers 310 in order to adjust the amount of the eco-friendly adhesive composition applied to one surface of the cushion fabric 11.

Preferably, the scraper roller 330 is a gap formed between the coating rollers 310 so that the amount of the eco-friendly adhesive composition applied to one side of the cushion fabric 11 is ^{40 to 70 g per 1 m 2 of the cushion fabric 11} It may be adjustable as it moves in the left-right direction.

The compression roller 320 may be movable in the vertical direction so as to adjust the gap formed between the coating rollers 310.

The gap formed between the scraper roller 330 and the coating roller 310 may be relatively narrower than the gap formed between the coating roller 310 and the compression roller 320.

The gap formed between the scraper roller 330 and the application roller 310 is the amount of the eco-friendly adhesive composition applied to one side of the cushion fabric 11 by moving the scraper roller 330 in the left and right directions. It may be formed to be 40 to 70g compared to ^2.

In the melting step (S220), the adhesive layer 12 formed on one surface of the cushion fabric 11 is cooled to harden to obtain a semi-finished product (B).

The cooling step S300 may be a step of obtaining a semi-finished product B by cooling the adhesive layer 12 formed on one surface of the cushion fabric 11 to harden using the first cooling unit 400.

The first cooling unit 400 may be provided between the application unit 300 and the winding unit 500 to cool the adhesive layer 12 formed on one surface of the cushion fabric 11 in the melting step (S220) to harden. .

The first cooling unit 400 may include an air blower 410, a cooling roller 420, a transfer roller 430, and a blowing fan 440.

The cooling step S300 may include a first cooling step S310, a second cooling step S320, and a third cooling step S330.

The first cooling step (S310) may be to supply outside air to the adhesive layer 12 formed on one surface of the cushion fabric 11 in the melting step (S220) to cool the adhesive layer 12 and cure the surface of the adhesive layer 12 have.

The first cooling step (S310) is performed by using an air blower 410 on the adhesive layer 12 formed on one surface of the cushion fabric 11 in the melting step (S220) for 1 to 3 seconds with an air volume of ^{20 to 30 m 3 /min.} It may be a step of supplying during.

The air blower 410 may be provided between the application unit 300 and the winding unit 500.

If the air volume of the outside air supplied to the adhesive layer 12 in the first cooling step (S310) is ^{less than 20 m 3} /min, the outside air supplied to the adhesive layer 12 is insufficient, so that the surface of the adhesive layer 12 may not be smoothly cured. I can.

When the air volume of the outside air supplied to the adhesive layer 12 in the first cooling step (S310) ^{exceeds 30 m 3} /min, the pressure of the outside air is excessive and the outside air penetrates into the adhesive layer 12 to form bubbles inside the adhesive layer 12 Otherwise, the adhesive layer 12 may be damaged.

The first cooling step (S310) is an adhesive layer 12 formed on one surface of the cushion fabric 11 in the melting step (S220) by blowing outside air into the adhesive layer 12 formed on one surface of the cushion fabric 11 in the melting step (S220). ) May be a step of cooling.

In the second cooling step (S320), the adhesive layer 12 formed on the cushion fabric 11 obtained in the first cooling step (S310) is brought into contact with the cooling roller 420 at 10 to 20° C. for 3 to 10 seconds. It may be a step of cooling the adhesive layer 12 formed on one side of 11).

The cooling roller 420 is provided between the air blower 410 and the winding unit 500 to contact the adhesive layer 12 formed on the cushion fabric 11 obtained in the first cooling step (S310). It may be to cool the adhesive layer 12 formed on one side.

The cooling roller 420 may be provided with a plurality of cooling water tubes 421 for lowering the surface temperature of the cooling roller 420 therein.

The third cooling step (S330) is a step of cooling the adhesive layer 12 by supplying outside air to the adhesive layer 12 formed on one surface of the cushion fabric 11 obtained in the second cooling step (S300) using a blowing fan 440 Can be

Meanwhile, when the cooling roller 420 has a relatively low surface temperature, water droplets may be formed on the surface, and when water droplets are formed on the surface of the cooling roller 420, cooling when the cooling roller 420 and the adhesive layer 12 come into contact with each other. Water droplets formed on the surface of the roller 420 may be buried on the surface of the adhesive layer 12 to form water droplets on the surface of the adhesive layer 12.

The blowing fan 440 may supply outside air to the adhesive layer 12 formed on one surface of the cushion fabric 11 obtained in the second cooling step (S320).

The transfer roller 430 has a vertical zigzag shape between the cooling roller 420 and the winding unit 500 so that an area in which the adhesive layer 12 contacts the outside air supplied from the blowing fan 440 increases and time is lengthened. It may be arranged to have.

The cushion fabric 11 passing through the cooling roller 420 may be transferred to the winding unit 500 along the arrangement direction of the transfer roller 430.

The blowing fan 440 may be provided on the transfer roller 430 to supply outside air to the adhesive layer 12 formed on one surface of the cushion fabric 11 to remove water droplets formed on the surface of the adhesive layer 12.

The cushion fabric 11 on which the adhesive layer 12 is formed on one surface obtained in the third cooling step (S330) is rolled up and stored in the form of a roll before the skin fabric 13 is stacked and heated and compressed in the pressing step (S400) to be described later. Can be.

The winding unit 500 may be to manufacture a semi-finished product (B) by winding the cushion fabric 11 in a roll form.

The skin fabric 13 is stacked on one surface of the semi-finished product B obtained in the cooling step (S300) and heat-compressed (S400).

In the pressing step (S400), the skin fabric 13 laminated on one side of the semi-finished product (B) may be used as long as it is commonly used as the skin of automobile interior materials, for example, natural fiber fabric, synthetic fiber fabric, natural leather. And synthetic leather.

The pressing step (S400) may be a step of stacking the skin fabric 13 on one surface of the semi-finished product (B) obtained in the cooling step (S300) using the pressing unit 600 and heat pressing.

In the pressing step (S400), the skin fabric 13 is stacked on one surface of the semi-finished product (B) obtained in the cooling step (S300), and the semi-finished product (B) in which the skin fabric 13 is laminated is 0.1 to It may be a step of heating and compressing by applying a pressure of 0.5 MPa for 20 to 60 seconds.

Preferably, in the pressing step (S400), the skin fabric 13 is stacked on one side of the semi-finished product (B) obtained in the cooling step (S300), and the semi-finished product (B) in which the skin fabric 13 is laminated is deposited at a temperature of 95 to 120°C. It may be a step of heating and compressing by applying a pressure of 0.2 to 0.3 MPa for 30 to 40 seconds.

The crimping part 600 may be one in which the skin fabric 13 is laminated on one surface of the semi-finished product B obtained from the winding part 500, and heat-compressed.

The crimping part 600 may be formed by laminating the skin fabric 13 on the adhesive layer 12 formed on one surface of the semi-finished product B obtained from the winding part 500 and performing heat-compression bonding.

The pressing part 600 may include a semi-finished product mounting part 610, a skin fabric mounting part 620, and a heating part 630.

The semi-finished product mounting part 610 may be a semi-finished product B obtained from the winding part 500 is mounted and unwinded to transfer the semi-finished product B to the interior rewinding part 500.

The epidermal fabric mounting part 620 is provided on the upper side of the semi-finished product mounting part 610 so that the cuticle fabric 13 is located on one side of the semi-finished product B, and the cuticle fabric 13 is mounted and unwinded to be unwinded. It may be to be transferred to the interior rewinding unit 500.

The heating part 630 is provided between the semi-finished product mounting part 610 and the skin fabric mounting part 620 and the interior material winding part 800 and transferred from the semi-finished product mounting part 610 to the skin fabric mounting part The skin fabric 13 transferred from the 620 may be stacked, and the semi-finished product B on which the skin fabric 13 is stacked may be compressed and heated.

The heating unit 630 may include a transfer belt 631, a main roller 632 and a heating heater 633.

The transfer belt 631 is provided between the semi-finished product mounting portion 610 and the skin fabric mounting portion 620 and the interior material winding portion 800 to be transferred from the semi-finished product mounting portion 610 and the skin fabric mounting portion 620, respectively. The skin fabric 13 may be laminated on the semi-finished product B, and the skin fabric 13 may be compressed to maintain the laminated state on the semi-finished product B.

The transfer belt 631 is provided between the semi-finished product mounting portion 610 and the skin fabric mounting portion 620 and the second cooling portion 700, and contacts the other surface of the semi-finished product (B) and the other surface of the skin fabric (13), respectively. It may be provided in the direction of the other surface of the semi-finished product (B) and the direction of the other surface of the skin fabric 13 so as to be able to do so.

The transfer belt 631 may be provided in the direction of the other surface of the semi-finished product B and the direction of the other surface of the skin fabric 13 to apply a pressure of 0.1 to 0.5 MPa to the semi-finished product B in which the skin fabric 13 is stacked. .

Preferably, the transfer belt 631 is provided in the direction of the other surface of the semi-finished product (B) and the direction of the other surface of the skin fabric 13 to apply a pressure of 0.2 to 0.3 MPa to the semi-finished product (B) in which the skin fabric 13 is stacked. Can be.

The main roller 632 may be provided with a plurality of transfer belts 631 inside the transfer belt so that the transfer belt 631 has a predetermined tension so that the transfer belt 631 can press the semi-finished product B with the skin fabric 13 stacked thereon. connect.

The heating heater 633 may be provided inside the transfer belt 631 to apply heat to the semi-finished product B in which the skin fabric 13 is stacked.

The heating heater 633 may be provided in the transfer belt 631 to apply heat of 90 to 125° C. to the semi-finished product B in which the skin fabric 13 is stacked.

Preferably, the heating heater 633 may be provided in the transfer belt 631 to apply heat of 95 to 120° C. to the semi-finished product B in which the skin fabric 13 is stacked.

The heating unit 630 may further include a plurality of sub-rollers 634 provided inside the transfer belt 631 so that the tension formed in the transfer belt 631 by the main roller 632 is maintained.

The cushion fabric 11 on which the skin fabric 13 obtained in the pressing step S400 is stacked is cooled to complete the interior material (S500).

The interior material completion step (S500) may be to complete the interior material by cooling the cushion fabric 11 on which the skin fabric 13 obtained in the compression step (S400) is stacked.

The interior material completion step S500 may be to complete the interior material by cooling the cushion fabric 11 on which the skin fabric 13 obtained in the compression step S400 is stacked using the second cooling unit 700.

The interior material completed in the interior material completion step (S500) may be wound around the interior material winding unit 800 in the form of a roll.

The interior material winding unit 800 may be to wind the interior material 10 for automobiles obtained from the second cooling unit 700 in a roll form.

<Example 1>

1. Preparation of eco-friendly adhesive composition

In a three-necked flask equipped with a mechanical stirrer, dimer acid (product name: UNIDYME 18 Dimer Acid, manufactured by KRATON) 500g, vegetable oil fatty acid containing tall oil fatty acid (product name: SYLFAT FA1, manufactured by KRATION) 20g, Adip Acid 50g, piperazine 50g, hexamethylenediamine 100g, poly(oxypropylene)diamine represented by Chemical Formula 4 316g, antifoaming agent (product name:SONFGNOX 1098, manufactured by Songwon Industries) 2g, phosphate ester acrylate as adhesion promoter (product name: Addox A-40, manufactured by Hou Chi Chemical Co.) 30g and an antioxidant (product name: SONGNOX 1098, manufactured by Songwon Industrial Co.) were mixed and reacted at 190°C for 2 hours in a nitrogen atmosphere. After the reaction, the temperature was raised to 230° C. in a nitrogen atmosphere, and reacted at 230° C. for 4 hours to prepare an eco-friendly adhesive composition.

2. Manufacture of interior materials for automobiles using eco-friendly adhesive composition

A cushion fabric 11 was prepared and the prepared cushion fabric was mounted on the fabric holder 100. At this time, a sponge made of a polyurethane material was prepared as the cushion fabric 11.

The eco-friendly adhesive composition prepared in 1. Preparation of the eco-friendly adhesive composition was added to the hopper 210. The eco-friendly adhesive composition was extruded by heating at a temperature of 150°C using the extrusion means 220, and the melted eco-friendly adhesive composition was discharged and supplied to the top of the coating roller 310.

The coating roller 310 was rotated in one direction to apply an eco-friendly adhesive composition to one surface of the cushion fabric 11 to form an adhesive layer 12. At this time, the distance between the coating roller 310 and the compression roller 320 is 65% of the thickness of the cushion fabric 11, and the distance between the coating roller 310 and the scraper roller 330 is the scraper roller 330. By adjusting left and right, 45 g of an eco-friendly adhesive composition was applied per ^{1 m 2} of one side of the cushion fabric 11.

The adhesive layer 12 formed on one side of the cushion fabric 11 was cooled and cured, and a semi-finished product (B) was manufactured by winding it in a roll shape using the winding unit 500. At this time, the cooling of the adhesive layer 12 formed on one surface of the cushion fabric 11 is performed by ^{supplying outside air to the adhesive layer 12 with an air volume of 25 m 3} /min for 2 seconds using an air blower 410 to prevent the adhesive layer 12 from being cooled. After curing the surface, the adhesive layer 12 was brought into contact with a cooling roller 420 at 15° C. for 5 seconds. After that, the cushion fabric 11 passed through the cooling roller 420 was passed through the transfer roller 430 and cooled using a blowing fan 440.

The manufactured semi-finished product (B) was mounted on the semi-finished product mounting portion 610, and the skin fabric 13 was mounted on the skin fabric mounting portion 620.

The semi-finished product (B) mounted on the semi-finished product mounting part 610 and the skin fabric 13 mounted in the skin fabric mounting part 620 were unwinded and transferred to the interior material winding part 800. Using the heating unit 630 provided between the semi-finished product mounting portion 610, the skin fabric mounting portion 620, and the interior material winding portion 800, the semi-finished product (B) in which the skin fabric 13 is laminated is obtained at 110° C. 0.25 MPa. It was heated and compressed at a pressure of 35 seconds, and then cooled to complete the interior material 10 for automobiles.

<Example 2>

An automobile interior material 10 was completed in the same manner as in Example 1. 1. In the preparation of the eco-friendly adhesive composition, 263g was mixed instead of 316g of poly(oxypropylene)diamine in the preparation of the eco-friendly adhesive composition.

<Example 3>

An automobile interior material 10 was completed in the same manner as in Example 1. 1. In the preparation of the eco-friendly adhesive composition, 368g was mixed instead of 316g of poly(oxypropylene)diamine in the preparation of the eco-friendly adhesive composition.

<Comparative Example 1>

An automobile interior material 10 was completed in the same manner as in Example 1. 1. In the preparation of the eco-friendly adhesive composition, 158g was mixed instead of 316g of poly(oxypropylene)diamine in the preparation of the eco-friendly adhesive composition.

<Comparative Example 2>

An automobile interior material 10 was completed in the same manner as in Example 1. 1. In the preparation of the eco-friendly adhesive composition, when preparing the eco-friendly adhesive composition, 210 g of poly(oxypropylene) diamine was mixed instead of 316 g.

<Comparative Example 3>

An automobile interior material 10 was completed in the same manner as in Example 1. 1. In the preparation of the eco-friendly adhesive composition, 421g was mixed instead of 316g of poly(oxypropylene)diamine in the preparation of the eco-friendly adhesive composition.

<Test Example 1>

The amount of volatile organic compounds (VOCs) emitted from the interior material for automobiles manufactured according to Example 1 was measured. The measurement method was based on the MS300-55:2019 standard, and is as follows.

First, the interior material for automobiles manufactured according to Example 1 is put into a sampling bag, and 2/3 of nitrogen is filled, and the stopper is closed. Put the sampling bag in an oven set at 65℃, heat it for 2 hours, leave it at room temperature for 30 minutes, cool the inside temperature to room temperature, and fill the sample bag with nitrogen so that it is completely filled. After collecting a sample by connecting a DNHP cartridge to the sampling bag, the sample was collected by connecting an adsorption tube filled with TENAX-TA immediately. The collected adsorption tube and DNHP cartridge were measured using gas chromatography and liquid chromatography.

Table 1 below shows the measurement results and recommended indoor air quality standards for newly manufactured vehicles according to the indoor air quality management standards for newly manufactured vehicles (Ministry of Land, Infrastructure and Transport Notification No. 2019-144).

Compound name Detection amount
(㎍/m ³ ) Detection limit detection amount
(㎍/m ³ ) Criteria for recommended detection amount
(㎍/m ³ ) benzene Not detected 3 30 toluene 36.2 3 1000 Ethyl benzene Not detected 3 1000 Xylene Not detected 3 870 Styrene Not detected 3 220 Formaldehyde Not detected 0.1 210 Acetaldehyde 66.5 0.1 300 Acro Lane Not detected 0.1 50 Specimen area: 36cm ²
No detection = less than detection limit

According to Table 1, it can be confirmed that benzene, ethyl benzene, xylene, styrene, formaldehyde, acetaldehyde, and acrolein are not detected in the interior material for automobiles manufactured according to Example 1, and toluene and acetaldehyde are detected. It can be confirmed that the detection amount is lower than the recommended standard of detection amount.

<Test Example 2>

The degree of odor of the interior material for automobiles manufactured according to Example 1 was tested. As for the test method, the MS300-34:2018 standard was applied, and specifically, it was measured by dividing it into a DRY condition and a WET condition as follows.

The test method for the DRY condition according to the MS300-34:2018 standard is to cut the automotive interior material manufactured according to Example 1 in a 4L container into 10cmX10cm, heat it at 78 to 82°C for 2 hours, and leave it at room temperature for 60 minutes. Each of the above phosphorus smelled and determined the odor grade.

The test method under different WET conditions according to the MS300-34:2018 standard is a glass beaker containing 20 ml of distilled water in a 4L container and a 10X10cm interior material for automobiles prepared according to Example 1, and heated at 78 to 82°C for 2 hours to room temperature. After leaving for 60 minutes, three or more people each smelled and determined the odor grade.

Regarding the odor grade, grade 6 is an intense odor that is difficult to bear with difficulty breathing, grade 5 is a very strong odor, grade 4 is a odor that can be easily detected, and grade 3 is a weakly sensed odor, and you can know what odor is. , Grade 2 means that it is not possible to know what the smell is, but feels the smell, and grade 1 means that there is no smell.

The measurement results are shown in Table 2 below.

Number of exams Judgment result (grade) DRY WET One 2.5 2.5 2 3.0 2.5 3 3.0 2.5 Average 3.0 2.5

Referring to Table 2, it can be seen that the odor grade of the interior material for automobiles manufactured according to Example 1 is less than or equal to 3 in both the DRY condition and the WET condition.

<Test Example 3>

In Test Example 3, the contents of lead, cadmium, mercury, and hexavalent chromium, which are the four heavy metals in the interior material for automobiles manufactured according to Example 1, were measured. As the test method, a method according to KS C IEC 62321:2009 was used. The test results are shown in Table 3 below.

ingredient Content (mg/kg(ppm) Detection limit (mg/kg(ppm)) Lead (Pb) Not detected 10 Cadmium (Cd) Not detected One Mercury (Hg) Not detected 0.1 Hexavalent chromium (Cr 6+) Not detected 0.1

Referring to Table 3, it can be seen that lead, cadmium, mercury, and hexavalent chromium are not detected above the detection limit in the automotive interior material manufactured according to Example 1, which is a result that satisfies the MS201-02:2017 standard. to be.

<Test Example 4>

In Test Example 4, the content of POLYBROMINATED BIPHENYLS (PBBs) of the interior material for automobiles manufactured according to Example 1 was measured. As the test method, a method according to IEC 62321-6:2015 was used. The test results are shown in Table 4 below.

ingredient Content (mg/kg(ppm) Detection limit (mg/kg(ppm)) MONOBROMOBIPHENYL Not detected 5 DIBROMOBIPHENYL Not detected 5 TRIBROMOBIPHENYL Not detected 5 TETRABROMOBIPHENYL Not detected 5 PENTABROMOBIPHENYL Not detected 5 HEXAPROMOBIPHENYL Not detected 5 HEPTABROMOBIPHENYL Not detected 5 OCTABROMOBIPHENYL Not detected 5 NONABROMOBIPHENYL Not detected 5 DECABROMOBIPHENYL Not detected 5

Referring to Table 4, it can be seen that chromium in PBBs is not detected in the interior material for automobiles manufactured according to Example 1 above the detection limit, which is a result that satisfies the MS201-02:2017 standard.

<Test Example 5>

In Test Example 5, the content of POLYBROMINATED BIPHENYL ETHERS (PBDEs) of the automotive nonwoven fabric manufactured according to Example 1 was measured. As the test method, a method according to IEC 62321-6:2015 was used. The test results are shown in Table 5 below.

ingredient Content (mg/kg(ppm) Detection limit (mg/kg(ppm)) MONOBROMOBIPHENYL ETHER Not detected 5 DIBROMOBIPHENYL ETHER Not detected 5 TRIBROMOBIPHENYL ETHER Not detected 5 TETRABROMOBIPHENYL ETHER Not detected 5 PENTABROMOBIPHENYL ETHER Not detected 5 HEXAPROMOBIPHENYL ETHER Not detected 5 HEPTABROMOBIPHENYL ETHER Not detected 5 OCTABROMOBIPHENYL ETHER Not detected 5 NONABROMOBIPHENYL ETHER Not detected 5 DECABROMOBIPHENYL ETHER Not detected 5

Referring to Table 5, it can be seen that chromium in PBBs is not detected above the detection limit in the interior material for automobiles manufactured according to Example 1, which is a result that satisfies the MS201-02:2017 standard.

<Test Example 6>

In Test Example 6, the adhesive strength of the automotive interior material 10 prepared according to Examples 1 to 3 and Comparative Examples 1 to 3, and the softening point of the eco-friendly adhesive composition prepared according to Examples 1 to 3 and Comparative Examples 1 to 3, and The viscosity at 150°C was measured.

In Test Example 6, the method for measuring the adhesive strength of the automotive interior material 10 manufactured according to Examples 1 to 3 and Comparative Examples 1 to 3 is the automotive interior material manufactured according to Examples 1 to 3 and Comparative Examples 1 to 3 ( 10) was prepared as a specimen having a height of 150 mm and a width of 30 mm, and the average value of the strength measured when the prepared specimen was peeled in the longitudinal direction at a peel speed of 200 mm/min using UTM was measured.

In Test Example 6, the method of measuring the softening point of the eco-friendly adhesive composition prepared according to Examples 1 to 3 and Comparative Examples 1 to 3 is based on the standard of ASTM E28 by measuring the softening point by the Ring and Ball Test. I did.

In Test Example 6, the viscosity measurement method of the eco-friendly adhesive composition prepared according to Examples 1 to 3 and Comparative Examples 1 to 3 was measured at 150°C using a Brookfield Viscometer.

The measurement results are summarized in Table 6 below.

Softening point (℃) Viscosity (cps/150℃) Adhesive strength (N/30mm) Example 1 105 14000 8 Example 2 92 11000 6 Example 3 118 20000 5 Comparative Example 1 80 9300 3 Comparative Example 2 87 10700 4 Comparative Example 3 124 35000 3

Referring to Table 6, it can be seen that the automotive interior materials manufactured according to Examples 1 to 3 have better adhesive strength than the automotive interior materials 10 manufactured according to Comparative Examples 1 to 3.

In addition, it can be seen that all of the eco-friendly adhesive compositions used in the manufacture of automotive interior materials according to Examples 1 to 3 have softening points below 120°C. This is a result of confirming that the eco-friendly adhesive composition according to the embodiment of the present invention has secured low-temperature workability.

However, it can be seen that the composition for an eco-friendly adhesive used in the manufacture of interior materials for automobiles according to Comparative Examples 1 to 2 has a low content of poly(oxypropylene)diamine and a softening point is too low. This is a result of confirming that heat resistance can be deteriorated when the content of poly(oxypropylene)diamine is low.

In addition, it can be seen that the composition for an eco-friendly adhesive used in manufacturing the interior material for automobiles according to Comparative Example 3 has an excessively high softening point and viscosity. That is, when the content of poly(oxypropylene) is excessive, it can be confirmed that the viscosity is excessively high, and as the viscosity is excessively increased, the automotive interior material 10 is not sufficiently coated with the adhesive on the cushion fabric 11 when the automotive interior material 10 is manufactured. It can be seen that the adhesive strength of the for interior material 10 is also lowered.

Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. The scope of the present invention is indicated by the scope of the claims to be described later rather than the detailed description, and all changes or modified forms derived from the scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention.

10: automobile interior material, 11: cushion fabric, 12: adhesive layer 13: skin fabric
A: film, B: semi-finished product
100: fabric mounting,
200: adhesive extrusion unit,
210: hopper, 220: extrusion means, 221: outlet,
300: applicator,
310: coating roller, 320: compression roller, 330: scraper roller,
400: first cooling unit,
410: air blower, 420: cooling roller, 421: cooling water tube,
430: conveying roller, 440: blowing fan,
500: winding part, 600: crimping part,
610: semi-finished product mounting portion, 620: skin fabric mounting portion, 630: heating portion,
631: conveying belt, 632: main roller 633: heating heater 634: sub roller,
700: second cooling part, 800: interior material winding part,
S100: adhesive preparation step, S200: adhesive layer formation step,
S210: fabric preparation step, S220: melting step, S230: applying step,
S300: cooling stage,
S310: first cooling step, S320: second cooling step, S330: third cooling step,
S400: compression step, S500: interior material completion step.

Claims (14)

40 to 60 parts by weight of dimer acid, 1 to 3 parts by weight of vegetable oil fatty acid, 3 to 8 parts by weight of aliphatic dicarboxylic acid, 25 to 35 parts by weight of poly(oxypropylene) diamine, 8 to 15 parts by weight of aliphatic linear diamine and aliphatic ring It is made of a polyamide hot melt adhesive prepared by reacting 2 to 7 parts by weight of diamine,
The softening point measured by the standard of ASTM E28 is 95 to 120 ℃
Is an eco-friendly adhesive composition. delete The method of claim 1,
The poly(oxypropylene)diamine is represented by the following formula (1)
Is an eco-friendly adhesive composition.
[Formula 1]

(In Formula 1, n is a natural number of 25 to 40.) The method of claim 1,
The aliphatic cyclic diamine contains piperazine,
The aliphatic linear diamine is represented by the following formula (2)
Is an eco-friendly adhesive composition.
[Formula 1]

(In Formula 2, R ₁ is C _4-8 straight or branched alkylene) The method of claim 1,
The vegetable oil fatty acid contains tall oil fatty acid,
The dicarboxylic acid is represented by the following formula (3)
Is an eco-friendly adhesive composition.
[Formula 3]

(In Formula 3, R ₂ is C _4-5 straight or branched alkylene) 40 to 60 parts by weight of dimer acid, 1 to 3 parts by weight of vegetable oil fatty acid, 3 to 8 parts by weight of aliphatic dicarboxylic acid and 25 to 35 parts by weight of poly(oxypropylene) diamine, 8 to 15 parts by weight of aliphatic linear diamine and aliphatic ring Preparing an eco-friendly adhesive composition consisting of a polyamide hot melt adhesive prepared by reacting 2 to 7 parts by weight of diamine and having a softening point of 95 to 120°C as measured according to ASTM E28;
Preparing a cushion fabric and uniformly applying the eco-friendly adhesive composition to one surface of the cushion fabric to form an adhesive layer;
Cooling the adhesive layer to cure to prepare a semi-finished product;
Laminating a skin fabric on the adhesive layer formed on the semi-finished product and heat-pressing it; And
Comprising; cooling the semi-finished product on which the skin fabric is stacked to complete an interior material for an automobile
A method of manufacturing an interior material for automobiles using an eco-friendly adhesive composition. delete The method of claim 6,
The step of forming the adhesive layer
Preparing at least one of a nonwoven fabric and a sponge made of at least one material selected from polyethylene, polyamide, polyester, and polyurethane as the cushion fabric;
Heating the eco-friendly adhesive composition to 130 to 160°C; And
Including; uniformly applying the heated eco-friendly adhesive composition to one surface of the cushion fabric
A method of manufacturing an interior material for automobiles using an eco-friendly adhesive composition. The method of claim 6,
The heat-pressing step
It is a step of heating and compressing the semi-finished product on which the skin fabric is laminated by applying a pressure of 0.1 to 0.5 MPa for 20 to 60 seconds at a temperature of 95 to 120°C.
A method of manufacturing an interior material for automobiles using an eco-friendly adhesive composition. delete delete delete delete delete

Images