KR20160148107A

KR20160148107A - Interior materials for automobiles and manufacturing mehtod of the same

Info

Publication number: KR20160148107A
Application number: KR1020150084134A
Authority: KR
Inventors: 전성모; 전병주; 김병민; 송은호; 홍민기
Original assignee: (주)엘지하우시스
Priority date: 2015-06-15
Filing date: 2015-06-15
Publication date: 2016-12-26
Also published as: WO2016204509A1

Abstract

The present invention relates to an interior material for automobiles which improves the migration resistance of a plasticizer and thus realizes excellent surface physical properties, and to a manufacturing method thereof. More specifically, the present invention relates to an interior material for automobiles, comprising: a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin; and a base layer comprising a second plasticizer and polyurethane (PU) foam. The present invention also relates to a manufacturing method thereof.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automotive interior door,

The present invention relates to an automotive interior material which improves the migration resistance of a plasticizer and realizes excellent surface physical properties and a method for producing the same.

The automotive interior material refers to various materials used in various parts of automobile interior. For example, it is used for cather fascia, dash board, console box, instrument panel etc. Is a resin molded product. Such an automotive interior material is often exposed to an environment such as high heat or ultraviolet rays for a long time, which may cause deterioration of physical properties such as hardening, deformation, discoloration or fading. This can be mainly caused by migration or volatilization of components constituting the automotive interior material over time. Accordingly, even if exposed to an environment such as high heat or ultraviolet rays for a long period of time, the properties of the automobile interior material are not deteriorated and it is necessary to prevent migration or volatilization of components constituting the automobile interior material in order to maintain excellent physical properties, This is an important issue in maintaining the indoor atmosphere and functionality of each part.

An embodiment of the present invention provides an automotive interior material for maintaining excellent surface physical properties and gloss even when exposed to an environment such as high heat or ultraviolet rays for a long period of time.

Another embodiment of the present invention provides a method for manufacturing an automotive interior material for effectively securing the above-described long-term durability and physical property-retaining performance of the automotive interior material.

In one embodiment of the present invention, a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin; And a base layer comprising a second plasticizer and a polyurethane (PU) foam. By this, it is possible to prevent deterioration of physical properties due to migration or volatilization of components constituting the automobile interior material have.

According to another embodiment of the present invention, there is provided a method of manufacturing an automotive interior material, comprising the steps of: preparing a composition for forming a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin; Preparing a surface layer using the surface layer forming composition; A second plasticizer, an aqueous solvent, a polyol compound, and an isocyanate compound; Applying the composition for forming a base layer to one surface of the surface layer; And a step of chemically reacting the composition for forming a base layer to produce a base layer comprising a second plasticizer and a polyurethane (PU) foam. The automobile interior material having excellent adhesion between the surface layer and the base layer can be produced through the manufacturing method of the automotive interior material and excellent process efficiency can be secured.

The automotive interior material can maintain excellent physical properties by preventing migration or volatilization of the components contained therein, and specifically can prevent degradation of physical properties such as hardening, discoloration, and discoloration due to migration of the plasticizer.

In addition, the method for manufacturing the automotive interior material can provide a method for manufacturing an automobile interior material which can be realized by maximizing the effects according to a specific process order and process conditions.

FIG. 1 schematically shows a cross-section of an automotive interior material according to an embodiment of the present invention.
2 schematically shows a step of preparing a surface layer from a composition for forming a surface layer according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art to which the invention pertains. Only. Like reference numerals refer to like elements throughout the specification.

An embodiment of the present invention includes a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin; And a base layer comprising a second plasticizer and a polyurethane (PU) foam.

1 schematically shows a cross section of an automotive interior material 100 according to an embodiment of the present invention. 1, the automotive interior material 100 includes a base layer 10 and a surface layer 20, and in particular, the surface layer 20 may be located on one side of the base layer 10 .

The automotive interior material refers to various materials used in various parts of the interior of the automobile. For example, the automotive interior material may include a cage fascia, a dash board, a console box, an instrument panel, It can be used as a resin material used for door trim and the like.

In the automotive interior material, a plasticizer is used to produce the surface layer, but a plasticizer is generally not used for the production of the base layer. However, in such a case, when the plasticizer is exposed to high heat or ultraviolet rays for a long time, the plasticizer easily detaches from the surface layer to the outside, thereby causing a problem of deteriorating physical properties such as hardening of the surface of the automobile interior material.

In order to solve such a problem, the automotive interior material according to the present invention is characterized in that not only the surface layer but also the base layer contain a plasticizer, specifically a surface layer comprising the first plasticizer and a base layer comprising the second plasticizer By using together, the migration resistance of the plasticizer can be improved. Further, it is possible to prevent deterioration of physical properties such as hardness and gloss of the automobile interior material by releasing the plasticizer from the surface layer to the outside.

Specifically, the interior of the automobile interior may contain 1 to 150 parts by weight of the second plasticizer, for example, 90 to 140 parts by weight, based on 100 parts by weight of the first plasticizer. Most preferably, 100 parts by weight of the second plasticizer may be added to 100 parts by weight of the first plasticizer.

The inclusion of the first plasticizer and the second plasticizer in the weight ratio within the above range can effectively prevent the plasticizer from being separated from the surface of the automotive interior material due to the interaction between the surface layer and the base layer. For example, when 100 parts by weight of the second plasticizer is contained in 100 parts by weight of the first plasticizer, such an effect can be maximized and the automobile interior material can secure excellent surface physical properties.

Wherein the first plasticizer and the second plasticizer are selected from the group consisting of a phthalate plasticizer, an adiphates plasticizer, a phosphate plasticizer, a trimellitate plasticizer, an epoxy plasticizer, A glycerol plasticizer, an aliphates plasticizer, and combinations thereof.

For example, the first plasticizer and the second plasticizer may each include a trimellitate plasticizer. In this case, the plasticizer may be more advantageous for improving the thermal stability and improving the anti-planarity, and the phthalate- free plasticizer, it is possible to prevent the release of environmental hormones harmful to the human body, thereby realizing an eco-friendly effect.

The first plasticizer contained in the surface layer and the second plasticizer contained in the base layer may include the same kind of plasticizer. That is, the first plasticizer and the second plasticizer may each include a homogenous plasticizer. For example, both the first plasticizer and the second plasticizer may include a trimellitate ester plasticizer.

In the case where the surface layer and the base layer each include a first plasticizer and a second plasticizer containing the same kind of plasticizer and when a structure in which two layers are laminated is applied to an automobile interior material, It is possible to more advantageously improve the anti-rusting property of the plasticizer as compared with the case of using the plasticizer, and it is possible to maintain the soft surface property well and effectively prevent deformation of the base layer.

The surface layer of the automotive interior material may include a first plasticizer and a polyvinyl chloride (PVC) resin. The first plasticizer may include about 10 to about 200 parts by weight, for example about 90 to about 140 parts by weight, based on 100 parts by weight of the polyvinyl chloride (PVC) resin. By incorporating the first plasticizer in the above range, it is easy to impart flexible physical properties together with the polyvinyl chloride (PVC) resin and can improve the impact strength at low temperature. In addition to the second plasticizer of the substrate layer, It may be advantageous to improve the plasticizer inner-surface planarity of the entire interior material.

The polyvinyl chloride (PVC) resin is a homopolymer resin of vinyl chloride; Copolymer resins of vinyl chloride and other unit monomers; Or a cross-linked polyvinyl chloride (PVC) resin.

For example, the surface layer may comprise a crosslinked polyvinyl chloride (PVC) resin, and the crosslinked polyvinyl chloride (PVC) resin means a resin in which polyvinyl chloride forms a crosslinked structure with each other. When the surface layer includes a crosslinked polyvinyl chloride (PVC) resin, the plasticizer can be trapped in the crosslinked structure, thereby improving the absorbency and migration preventing performance of the plasticizer.

The polyvinyl chloride (PVC) resin may have a K-value of about 30 to about 80. [ When the K-value (K-value) of the polyvinyl chloride (PVC) resin is less than about 30, it is difficult for the polyvinyl chloride (PVC) resin to secure sufficient mechanical or thermal properties in the production of the surface layer, There is a problem that the absorptivity of the polyvinyl chloride (PVC) resin is lowered. When the viscosity exceeds about 80, the viscosity of the polyvinyl chloride (PVC) resin is excessively increased and the production efficiency of the surface layer is lowered.

The K-value is also referred to as a K-value (Fikentscher's K-value) of the PVC as a value relating to the intrinsic viscosity of a polyvinyl chloride (PVC) resin. The K-value may be measured by the method of DIN EN ISO 1628-1, and the degree of polymerization of the polyvinyl chloride (PVC) resin may be derived from the K-value from the conversion table.

For example, when the polyvinyl chloride (PVC) resin comprises a homopolymer of vinyl chloride, the degree of polymerization may be from about 1,000 to about 2,000, for example from about 1,000 to about 1,600 have. The degree of polymerization of the vinyl chloride homopolymer resin means the number of vinyl chloride monomer units constituting the resin by polymerization. If the degree of polymerization is less than the above range, there is a possibility that the physical properties required for tensile strength and elongation may not be satisfied. If the degree of polymerization is above the above range, the workability of the surface layer and the absorbency of the plasticizer may be deteriorated.

The surface layer is prepared from a composition for forming a surface layer comprising the polyvinyl chloride (PVC) resin and the first plasticizer, wherein the composition for forming a surface layer may contain a pigment, a heat stabilizer, an antistatic agent, , UV stabilizers, impact modifiers, processing aids, and the like.

The base layer of the automotive interior material may comprise a second plasticizer and a polyurethane (PU) foam. At this time, the second plasticizer may be included in an amount within the range described above relative to 100 parts by weight of the first plasticizer.

Specifically, the polyurethane (PU) foam may be formed from a composition comprising the second plasticizer, an aqueous solvent, a polyol compound, and an isocyanate compound. The second plasticizer is included in the composition for the production of the polyurethane (PU) foam, and the polyurethane (PU) foam formed from the composition is contained in the base layer, .

Generally, a polyurethane (PU) chemical structure is formed by reacting a hydroxyl group (-OH) of a polyol compound with an isocyanate group (-NCO) of an isocyanate compound, and by foaming the composition containing a polyol compound and an isocyanate compound, Polyurethane (PU) foams may be prepared.

The polyol compound and the isocyanate compound may be selected and used as long as they are capable of forming a polyurethane (PU) foam.

The aqueous solvent may specifically include water, which may act as a direct reactant to the formation of polyurethane (PU) foams.

The composition for making the polyurethane (PU) foam may include one or more additives selected from a reaction catalyst, a foam stabilizer, a crosslinking agent, a foaming agent, and the like.

The composition for preparing the polyurethane (PU) foam may contain about 30 to about 70 parts by weight of the polyol compound per 100 parts by weight of the isocyanate compound. When the polyol compound is included in the above-mentioned range, it can react with the isocyanate compound to prepare a foam having a foam structure suitable for an automobile interior material, and can be also excellent in compatibility with the second plasticizer.

The polyurethane (PU) foam may have a density of from about 5 kg / m 3 to about 15 kg / m 3, for example from about 8 kg / m 3 to about 13 kg / m 3. When the density of the polyurethane (PU) foam satisfies the above-mentioned range, the base layer containing the same easily realizes the effect of the plasticizer innerwear, and can impart appropriate flexibility and strength to the automotive interior material.

Specifically, the automotive interior material may include a laminate structure of the surface layer and the base layer, and may include a structure in which the surface layer is disposed on one side of the base layer.

In this case, the surface layer and the base layer may have a thickness ratio of the surface layer: base layer of about 1: 7 to about 2: 7, for example, about 1: 7 to about 1.5: 7. The surface layer containing the first plasticizer and the base layer containing the second plasticizer satisfy the thickness ratio in the above range, the anti-fogging property of the plasticizer can be improved, and the surface layer and the substrate layer containing the above- The interior material can be maintained in a state excellent in hardness and gloss for a long period of time.

The thickness of the surface layer may be from about 1 mm to about 2 mm. When the thickness of the surface layer satisfies the above range, the phenomenon that the plasticizer is released to the outside of the surface layer can be effectively prevented, and the surface layer can be easily produced. In addition, it is possible to realize an appropriate thickness corresponding to the use of the automobile interior material.

Another embodiment of the present invention is a method for producing a surface layer, comprising: preparing a composition for forming a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin; Preparing a surface layer using the surface layer forming composition; Preparing a composition for forming a base layer comprising a first plasticizer, a second plasticizer, an aqueous solvent polyol compound and an isocyanate compound; Applying the composition for forming a base layer to one surface of the surface layer; And a step of chemically reacting the composition for forming a base layer to produce a base layer comprising a second plasticizer and a polyurethane (PU) foam.

The automotive interior material as described above can be manufactured through the method for manufacturing the automotive interior material. Since the surface layer and the base material layer both contain a plasticizer, it is possible to improve the durability of the plasticizer to improve the surface hardness and physical properties Can be maintained for a long period of time.

Specifically, the amount of the second plasticizer may be 1 to 150 parts by weight, for example, 90 to 140 parts by weight based on 100 parts by weight of the first plasticizer. Most preferably, the second plasticizer may be 100 parts by weight based on 100 parts by weight of the first plasticizer.

By using the first plasticizer and the second plasticizer in a weight ratio within the range, it is possible to effectively prevent the plasticizer from being separated from the surface of the automotive interior material by the interaction between the surface layer and the base layer. For example, when 100 parts by weight of the second plasticizer is contained in 100 parts by weight of the first plasticizer, such an effect can be maximized and the automobile interior material can secure excellent surface physical properties.

The method for manufacturing the automotive interior material includes a step of preparing a composition for forming a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin. The matters concerning each of the first plasticizer and the polyvinyl chloride (PVC) resin are as described above.

In this step, the first plasticizer and the polyvinyl chloride (PVC) resin may be mixed at about 60 ° C to about 140 ° C. If the temperature range is less than about 60 ° C, the polyvinyl chloride (PVC) resin and the first plasticizer do not secure sufficient fluidity, and the polyvinyl chloride (PVC) resin has a problem of lowering the absorbency of the first plasticizer , And if it exceeds 140 ° C, the polyvinyl chloride (PVC) resin may be thermally decomposed.

The composition for forming a surface layer may contain at least one additive such as a pigment, a heat stabilizer, an antistatic agent, an antioxidant, a lubricant, a UV stabilizer, an impact modifier, and a processing aid, if necessary.

The method for manufacturing an automotive interior material includes a step of preparing a composition for forming a base layer comprising a second plasticizer, a polyol compound and an isocyanate compound.

The method for manufacturing the automobile interior material includes a step of producing a surface layer using the composition for forming a surface layer. At this time, the surface layer may be manufactured using a Powder Slush Molding (PSM) method.

FIG. 2 is a schematic view showing a step of preparing the surface layer by a powder slush molding (PSM) method using the surface layer forming composition.

Referring to FIG. 2, the step of fabricating the surface layer using the PSM method includes the steps of: providing a metal mold 11 having a shape corresponding to a resultant surface shape of the surface layer; Heating the mold (11); Coupling a powder box (12) containing the surface layer forming composition to the mold (11); Rotating the mold (11) and the powder box (12) so that they are flipped up and down to insert the composition for forming a surface layer into the heated mold (11); The surface layer 10 having a predetermined thickness is formed on one side of the mold 11 by rotating the mold 11 and the powder box 12 in a combined state so as to be inverted up and down, Into a box (12); Cooling the mold (11); And separating the surface layer (10) from the mold (11).

Since the surface layer is manufactured using the PSM method, even if the surface layer has a complicated surface shape, the surface layer can be manufactured precisely and it can be advantageous to realize a soft touch feeling.

Specifically, the step of preparing the composition for forming a base layer includes the steps of: preparing a mixture of the second plasticizer and the polyol compound; And mixing the mixture with the isocyanate compound. That is, the base layer forming composition may be prepared by first mixing the second plasticizer and the polyol compound, and then further mixing the isocyanate compound.

Since the isocyanate compound is relatively reactive and has a high viscosity, the second plasticizer can be mixed well in the composition for forming a base layer as a whole by preferentially mixing the polyol compound and the second plasticizer, and subsequently, The processability can be improved in the process of manufacturing the film.

The composition for forming a base layer may include at least one additive selected from a reaction catalyst, a foam stabilizer, a crosslinking agent, a foaming agent, and the like.

The method for manufacturing an automotive interior material includes a step of applying the composition for forming a base layer to one surface of the surface layer. The composition for forming the base layer may be applied to one surface of the surface layer by a spray method.

At this time, the composition for forming a base layer may be applied such that the base layer formed therefrom and the surface layer satisfy the thickness ratio of the surface layer: base layer = about 1: 7 to about 2: 7, Can be applied to satisfy the thickness ratio of about 1.5: 7. When the composition for forming a base layer is applied so as to satisfy these conditions, the processability of the coating improves. As a result, the surface layer containing the first plasticizer and the base layer containing the second plasticizer satisfy the thickness ratio of the above range Whereby the durability of the plasticizer can be improved.

The method for manufacturing an automotive interior material comprises chemically reacting the composition for forming a base layer to produce a base layer comprising a second plasticizer and a polyurethane (PU) foam.

Specifically, the chemical reaction of the composition for forming a base layer may be a chemical reaction of a polyol compound and an isocyanate compound in the composition for forming a base layer, whereby a polyurethane (PU) foam can be produced.

The chemical reaction of the composition for forming a base layer may occur at room temperature and atmospheric pressure. Although the chemical reaction of the composition for forming a base layer takes place at room temperature and atmospheric pressure, the composition for forming a base layer can be foamed owing to the heat of reaction due to the chemical reaction, and consequently the base layer is a polyurethane (PU) . As a result, the base layer can secure an appropriate density and can have a foam structure suitable for improving the anti-fogging property of the plasticizer in relation to the surface layer. At this time, the 'normal temperature' may be a temperature of about 20 ° C to about 35 ° C, and the 'atmospheric pressure' may be a pressure of about 0.8 atm to about 1.2 atm.

Hereinafter, specific embodiments of the present invention will be described. However, the embodiments described below are only intended to illustrate or explain the present invention, and thus the present invention should not be limited thereto.

< Example And Comparative Example >

Example One

100 parts by weight of a trimellitate plasticizer as a first plasticizer was mixed with 100 parts by weight of a polyvinyl chloride (PVC) resin at a temperature of 60 캜 using a mixer, and a heat stabilizer, a lubricant and an antioxidant To prepare a composition for forming a surface layer. Subsequently, the surface layer forming composition was processed by the PSM method to prepare a surface layer having a thickness of 1 mm.

10 parts by weight of a trimellitate plasticizer as a second plasticizer of the same kind as that of the first plasticizer was prepared with respect to 100 parts by weight of the first plasticizer and the mixture was mixed with a polyol compound containing poly (oxypropylene glycol) , Isocyanate compound mixed with 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate was added to the mixture. Thus, a composition for forming a base layer including 62 parts by weight of the polyol compound with 100 parts by weight of the isocyanate compound together with the second plasticizer was prepared.

Subsequently, the composition for forming a base layer was foamed on one surface of the surface layer at the same time as the application at room temperature and 1 atm atmospheric pressure at 25 ° C to prepare a base layer having a thickness of 7 mm including a polyurethane (PU) foam. Thus, an automotive interior material including a structure in which the base layer and the surface layer were laminated was prepared.

Example 2

An automotive interior material was prepared in the same manner as in Example 1, except that 20 parts by weight of the second plasticizer was blended with 100 parts by weight of the first plasticizer.

Example 3

An automotive interior material was prepared in the same manner as in Example 1, except that 40 parts by weight of the second plasticizer was blended with 100 parts by weight of the first plasticizer.

Example 4

An automotive interior material was prepared in the same manner as in Example 1 except that 100 parts by weight of the second plasticizer was mixed with 100 parts by weight of the first plasticizer.

Comparative Example One

An automotive interior material was prepared in the same manner as in Example 1 except that the composition for forming a base layer did not contain the second plasticizer.

<Evaluation>

Experimental Example 1: Measurement of surface hardness

The surface hardness of the surface layer was measured using a shore A hardness meter after storing the automobile interior material of the above Examples and Comparative Examples for 1 day at a temperature of 25 ° C and 1 atm, Respectively.

Experimental Example 2: Inner planet ( migration resistance )

The automobile interior materials of the above examples and comparative examples were prepared, the initial weight was measured, and the specimens were aged at a temperature of 120 ° C and 500 hours.

Thereafter, the exterior appearance of the automotive interior material was observed, and scores of 1 to 4 points were imposed on the result. Specifically, one point indicates a state where the migration is severe and the state is oil-filled, the two points indicate migration and the surface is slippery, and the three points indicate that the migration is hardly progressed. The surface shows a good state, and the four points do not cause migration of the plasticizer, so that the surface shows a good state.

Further, the weight before and after wiping the surface of the automotive interior material was measured The degree of migration of the plasticizer to the surface of the surface layer was determined. The change in weight before and after aging of the automobile interior material, that is, the weight reduction amount is shown in Table 1 below.

Experimental Example 3: Polished Measure

After the automotive interior materials of the above Examples and Comparative Examples were manufactured, they were heat-aged at a temperature of 120 ° C and 500 hours, left standing at room temperature for one day, and observed using a gloss meter.

The measurement results of the content ratio of the first plasticizer and the second plasticizer, the surface hardness, the anti-fogging property and the glossiness in Examples 1-4 and Comparative Example 1 are shown in Table 1 below.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 First plasticizer To 100 To 100 To 100 To 100 To 100 Second plasticizer 10 20 40 100 - Surface hardness 50 45 43 38 55 Inner planet (based on 4 points) 2 3 4 4 One Glossiness 1.8 1.5 1.2 1.0 2.1 Weight change (g) 0.3 0.21 0.15 0.02 0.8

In the case of Examples 1 to 4 above, the substrate layer and the surface layer all contain the same kind of plasticizer, and as compared with the case where the substrate layer does not contain the plasticizer as in Comparative Example 1 , And the surface hardness after a lapse of a certain time was low. As a result, it was confirmed that the phenomenon of hardening of the surface due to the migration phenomenon of the plasticizer did not appear.

Furthermore, in the case of Examples 1 to 4, it was also found that the results of the evaluation of the inner firing ability on the basis of the four points show significantly superior physical properties to those of Comparative Example 1.

In addition, in Examples 1 to 4, the gloss was lower than that of Comparative Example 1, and thus, the surface glossiness of the surface of the plasticizer as compared with Comparative Example 1 in Examples 1 to 4 And it was confirmed that almost none of them appeared.

In the case of Examples 1 to 4, it was found that the weight change before and after aging of the automobile interior material was remarkably smaller than that of Comparative Example 1. This weight change is attributable to the weight reduction due to the migration of the plasticizer. From the results, it can be confirmed that the plasticizers of Examples 1 to 4 have better anti-rustability than the plasticizers of Comparative Example 1.

In addition, considering the results of Examples 1 to 4, it was found that the durability of the plasticizer is improved as the second plasticizer of the base layer is contained in the same amount as the first plasticizer of the surface layer.

100: Car interior material
10: substrate layer
20: Surface layer
11: Mold
12: Powder box

Claims

A surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin; And
A second plasticizer and a polyurethane (PU) foam.
Car interior materials.

The method according to claim 1,
And 1 to 150 parts by weight of the second plasticizer relative to 100 parts by weight of the first plasticizer
Car interior materials.

The method according to claim 1,
Wherein the first plasticizer and the second plasticizer are selected from the group consisting of a phthalate plasticizer, an adiphates plasticizer, a phosphate plasticizer, a trimellitate plasticizer, an epoxy plasticizer, (S) selected from the group consisting of a glycidyl plasticizer, a glycoll plasticizer, an aliphates plasticizer, and combinations thereof.
Car interior materials.

The method according to claim 1,
Wherein the first plasticizer and the second plasticizer each comprise a homogeneous plasticizer
Car interior materials.

The method according to claim 1,
Wherein the surface layer contains 10 to 200 parts by weight of the first plasticizer relative to 100 parts by weight of the polyvinyl chloride (PVC) resin
Car interior materials.

The method according to claim 1,
The K-value (K-value) of the polyvinyl chloride (PVC) resin is 30 to 80
Car interior materials.

The method according to claim 1,
The polyurethane (PU) foam is formed from a composition comprising the second plasticizer, an aqueous solvent, a polyol compound and an isocyanate compound
Car interior materials.

8. The method of claim 7,
Wherein the composition contains 30 to 70 parts by weight of the polyol compound per 100 parts by weight of the isocyanate compound
Car interior materials.

The method according to claim 1,
The polyurethane (PU) foam has a density of 5 kg / m 3 to 15 kg / m 3
Car interior materials.

The method according to claim 1,
Wherein the surface layer and the base layer have a surface layer: base layer thickness ratio of 1: 7 to 2: 7
Car interior materials.

Preparing a composition for forming a surface layer comprising a first plasticizer and a polyvinyl chloride (PVC) resin;
Preparing a surface layer using the surface layer forming composition;
A second plasticizer, an aqueous solvent, a polyol compound, and an isocyanate compound;
Applying the composition for forming a base layer to one surface of the surface layer; And
And chemically reacting the composition for forming a base layer to produce a base layer comprising a second plasticizer and a polyurethane (PU) foam
A method for manufacturing an automotive interior material.

12. The method of claim 11,
The second plasticizer is used in an amount of 1 to 150 parts by weight per 100 parts by weight of the first plasticizer
A method for manufacturing an automotive interior material.

12. The method of claim 11,
Wherein the surface layer forming composition is prepared by mixing the first plasticizer and the polyvinyl chloride (PVC) resin at 60 캜 to 140 캜
A method for manufacturing an automotive interior material.

12. The method of claim 11,
The step of preparing the surface layer using the composition for forming a surface layer includes:
And is carried out by a powder slush molding (PSM) method
A method for manufacturing an automotive interior material.

12. The method of claim 11,
The step of preparing the composition for forming a base layer,
Preparing a mixture of said second plasticizer and said polyol compound; And
And mixing the mixture with the isocyanate compound.
A method for manufacturing an automotive interior material.

12. The method of claim 11,
The chemical reaction of the composition for forming a base layer occurs at room temperature and atmospheric pressure
A method for manufacturing an automotive interior material.