KR102100671B1 - Manufacturing method of automotive interior material and automotive interior material - Google Patents

Abstract

Forming a base layer; Forming a primer layer; And forming a printed layer using a predetermined blanket. The present invention provides a method for manufacturing a vehicle interior material and a vehicle interior material.

Description

Manufacturing method of interior materials for vehicles and interior materials for vehicles {MANUFACTURING METHOD OF AUTOMOTIVE INTERIOR MATERIAL AND AUTOMOTIVE INTERIOR MATERIAL}

It relates to a method for manufacturing a vehicle interior material and a vehicle interior material.

The design aspect is considered to be one of the important factors because the molded materials such as interior materials for vehicles or automobiles are visually checked by the occupant or the user and there may be continuous physical contact.

Generally, hydraulic transfer, IML, and TOM methods are used to express various aesthetics and textures on moldings such as interior materials of vehicles.

The hydraulic transfer method is a method of floating a printing film on the surface of water and transferring it to an injection material.The IML film method is a method of inserting a printing film into a mold using a so-called insert molding labeling method, and the TOM method is a so-called three-dimensional overlay method. Means a method for pressure-molding in a vacuum.

However, the above-described methods have a problem in that the printing precision is low, the printing of the curved portion is not easy, and the manufacturing process is complicated and expensive cost is consumed.

In one embodiment of the present invention, it provides a method for manufacturing a vehicle interior material that prevents color interference due to a unique color of a substrate while realizing excellent printing precision.

In another embodiment of the present invention, while providing excellent printing precision, it provides a vehicle interior material that prevents color interference due to the inherent color of the substrate.

However, the technical problem to be achieved by the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In one embodiment of the present invention, forming a base layer (S1); Forming a primer layer (S2); And forming a printed layer using a predetermined blanket (S3); provides a method for manufacturing a vehicle interior material.

The manufacturing method forms a primer layer on the surface of the molded product through a printing method using a predetermined pad or blanket, thereby forming a primer layer while realizing excellent workability and excellent economical efficiency, and effectively peeling off between the substrate and the printed surface. There is an advantage that can be prevented.

The primer layer may be formed to have an average thickness of 0.1 μm to 50 μm.

The step of sequentially forming the base layer and the primer layer, and forming a color interference complementary layer on the primer layer; may further include a. Accordingly, it is possible to effectively prevent the color interference phenomenon that the color of the printed layer is not properly implemented due to the inherent color of the base layer.

The average thickness of the color interference complementary layer may be formed to about 0.1㎛ to 50㎛.

A printed layer may be formed on the color interference complementary layer by using a predetermined blanket.

The manufacturing method of the vehicle interior material and the vehicle interior material may prevent color interference due to the inherent color of the substrate while realizing excellent printing precision.

1 is a schematic process flow diagram of a method for manufacturing a vehicle interior material according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a vehicle interior material according to another embodiment of the present invention.

In this specification, when it is said that a certain embodiment or / and a certain component included in a component “includes” a certain component, it does not exclude other components unless specifically stated otherwise. It can mean what can be further included.

In this specification, any configuration is formed or located on the upper (or lower) or upper (or lower) of the substrate means that any configuration is formed or positioned in contact with the upper surface (or lower surface) of the substrate. In addition, it is not limited to not including other configurations between the substrate and any configuration formed on (or under) the substrate.

As used herein, the term “~ (step)” or “step of” does not mean “step for”.

As used herein, the terms “about”, “substantially”, and the like are used in or near the numerical values when manufacturing and material tolerances unique to the stated meanings are presented, and the understanding of the present application. To aid, accurate or absolute figures can be used to prevent unscrupulous use of the disclosed disclosure by unscrupulous intruders.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily practice. However, the present invention can be implemented in various different forms, and the embodiments described below are only for specifically illustrating or describing the present invention, and are not limited to the embodiments described herein.

In the drawings attached to the present specification, parts not related to the description are omitted in order to clearly describe the present invention, and the same reference numerals are assigned to the same or similar elements throughout the specification. In the drawings, thicknesses are enlarged to clearly represent various layers and regions. In addition, in the drawings, for convenience of description, thicknesses of some layers and regions are exaggerated.

1 schematically shows a process flow diagram of a method for manufacturing a vehicle interior material according to an embodiment of the present invention.

The manufacturing method includes forming a base layer (S1); Forming a primer layer (S2); And forming a printed layer using a predetermined blanket (S3).

Generally, hydraulic transfer, IML, and TOM methods are used to express various aesthetics and textures on moldings such as interior materials of vehicles.

However, the above-described construction methods have low printing precision, the printing of the curved portion is not easy, and the manufacturing process is complicated and expensive costs can be consumed.

In addition, there is a problem that it can be easily peeled off from the substrate and the printed surface as it is exposed to a high temperature or high humidity environment during the use process.

Accordingly, in one embodiment of the present invention, the manufacturing method forms a printed layer on the surface of the molding through a printing method using a predetermined pad or blanket, thereby forming a primer layer while realizing excellent workability and excellent economics. There is an advantage that can effectively prevent peeling between the substrate and the printing surface.

In this specification, the predetermined pad or blanket is preceded by, for example, Korean Patent Nos. 10-0715090, 10-0854208, 10-1528967, Korean Patent Publication No. 10-2015-0011839, etc. The known kind disclosed in the literatures can be appropriately selected and used according to the purpose and use of the invention, and is not particularly limited.

In the above manufacturing method, a substrate layer can be formed.

The base layer may include a molded article including a flat surface, an uneven surface, or both, or may be the molded article. For example, the base layer may be formed of a molded article that includes only a flat surface, or may be formed of a molded article that includes only a surface that includes irregularities or embosses, and also includes both flat and uneven surfaces. It can also be formed into a molding.

The surface of the substrate layer may partially or entirely include an uneven surface.

As such, when the surface of the substrate layer includes a concave-convex surface, the concave-convex surface includes a concave portion and a convex portion, and the width of the convex portion may be the same or larger than the width of the concave portion. As described above, by controlling the shape of the molding so that the width of the convex portion is equal to or larger than the width of the concave portion, it is possible to effectively prevent the smearing of ink transferred to the convex portion.

For example, the molding may be formed so that the width of the concave portion is about 0.01 mm to about 50 mm, and the molding may be formed such that the width of the convex portion is about 0.01 mm to about 200 mm.

In addition, the molding may be formed so that the depth of the concave portion is about 0.01 mm to about 20 mm, and the molding may be formed so that the height of the convex portion is about 0.01 mm to about 20 mm.

By forming the concave portion or the convex portion at a depth or height within the range, printing can be performed more precisely by the printing method using the blanket, while providing sufficient three-dimensional effect to improve freedom of design.

As shown in FIG. 2, in this specification, the width W ₁ of the convex portion is assumed to be a planar shape rather than an uneven shape, and the maximum width of the convexly projected portion from the surface of the virtual plane shape. Meaning, the width W _{2 of the} concave portion means the maximum width of the concave portion, and the height H ₁ or the depth H ₂ of the convex portion is most convex from the surface of the imaginary plane shape. It may mean the length of the waterline to the protruding point or the most concave point.

In addition, when a part of the surface of the molding is formed as an uneven surface, the proportion occupied by the uneven surface among the entire area of the surface of the molding may be, for example, about 20% to about 100%, and, for example, about 30 % To about 60%.

The uneven shape included in the uneven surface may include, for example, at least one selected from the group consisting of a triangular pattern, a square pattern, a pentagonal pattern, a hexagonal pattern, a curved pattern, and combinations thereof, and the desired design. In order to implement it may be included in any combination, but is not limited thereto.

The total thickness of the base layer may be appropriately selected according to the purpose and use of the invention, and is not particularly limited.

In the above manufacturing method, for example, a resin composition is prepared by mixing at least two or more selected from the group consisting of thermoplastic resins, thermosetting resins, solvents, inorganic fillers, other additives, and combinations thereof, and injection molding the resin composition. Can form.

The process conditions during injection molding may vary depending on the type of resin used therein, for example, may be performed within a temperature range of about 120 ° C to about 350 ° C, but is not limited thereto. In addition, the pressure in the process conditions can be appropriately adjusted according to the specific shape or thickness of the injection molding.

The thermoplastic resin is, for example, polyvinyl chloride resin (PVC), polystyrene, polyethylene, polypropylene, acrylonitrile butadiene styrene, polycarbonate, polyamide, acrylic, nylon, vinyl acetate thermoplastic polyolefin resin (TPO), thermoplastic polyurethane Resin (TPU), and combinations thereof may include at least one selected from the group consisting of.

The thermosetting resin is, for example, phenol, epoxy, polyester, polyurethane, melamine, urea resin, and the like, and may include at least one selected from the group consisting of combinations thereof.

The thermoplastic resin and the thermosetting resin may be mixed in the composition such that they are included in, for example, about 10% to about 99% by weight.

The organic solvent is toluene, xylene, dibutyl ether, isopropyl ether, dioxane, tetrahydrofuran, acetone, diethyl ketone, methyl ethyl ketone, methyl isobutyl ketone, methyl propyl ketone, cyclohexanone and these It may include at least one selected from the group consisting of, but is not limited thereto.

The other additives may include at least one selected from the group consisting of flame retardants, water repellents, antistatic agents, sunscreens, and combinations thereof, but are not limited thereto.

In the above manufacturing method, a primer layer may be formed, and specifically, the primer layer may be formed on the base layer.

The primer layer may be formed by applying and drying a composition for forming a primer layer on the substrate.

The composition for forming the primer layer is, for example, as a base resin, polyester resin, fluorine resin, acrylic resin, vinyl chloride resin, polyester resin, epoxy resin, phenol resin, polyamide resin, poly It may include at least one selected from the group consisting of urethane-based, copolymers of vinyl chloride and vinyl acetate, copolymers of styrene and butadiene, and combinations thereof.

The base resin may include from about 0.5% to about 20% by weight.

In addition, the composition for forming the primer layer may further include an organic solvent, a curing agent, an adsorbent, and a reinforcing material.

For the application, for example, one of a die coating method, a gravure coating method, a knife coating method, a bar coating method, and a spray coating method may be used, specifically, a spray coating method may be used, and a spray coater Etc. can be used.

The drying may be performed under, for example, a temperature of 60 ° C to 90 ° C and a time condition of 15 minutes to 120 minutes.

The primer layer may be formed to have an average thickness of 0.1 μm to 50 μm.

Forming a thickness within the above range can sufficiently improve the adhesion of two different layers stacked on both sides thereof, and may not increase the total thickness of the vehicle interior material.

In addition, the step of forming the primer layer may be repeated a plurality of times, for example, may be repeated about 1 to 20 times, but is not limited thereto.

In the manufacturing method, forming the base layer and the primer layer sequentially, and forming a color interference complementary layer on the primer layer; may further include a.

As described above, by forming the color interference complementary layer, it is possible to effectively prevent the color interference phenomenon that the color of the printed layer is not properly implemented due to the inherent color of the base layer. At the same time, the color interference complementary layer is positioned between the primer layer and the printing layer to make them adhere more firmly, thereby effectively increasing the adhesion between the conventional substrate and the printing surface.

In the step of forming the color interference complementary layer, in the group consisting of (meth) acrylic resin, urethane resin, alkyd resin, polyol, linseed oil resin, nitrocellulose, and combinations thereof The color interference complementary layer may be formed by applying and curing the composition for forming the complementary layer containing the binder including at least one selected on the primer layer.

The composition for forming the complementary layer may be cured by, for example, room temperature curing, thermal curing, photocuring, or a combination method thereof.

The composition for forming the complementary layer may contain the binder in an amount of about 0.1% to about 10% by weight, and specifically, about 0.1% to about 3.0% by weight.

In addition, the composition for forming the complementary layer may further include at least one selected from the group consisting of a coloring agent, extender pigment, curing agent, antioxidant, solvent, and combinations thereof.

The colorant may include, for example, a colorant of the same kind as the colorant included in the print layer, a white colorant, or both. Accordingly, it may be easy to realize a color to be expressed by the print layer.

The white-based colorant may include, for example, a white pigment comprising at least one selected from titanium dioxide, zinc oxide, zinc sulfide, calcium carbonate, clay, lidophone (a mixture of barium sulfate and zinc sulfide), and combinations thereof. It can contain.

The extender pigments are calcium carbonate, talc, bentonite, clay, magnesium silicate, barium sulfate, silica, boron nitride, aluminum nitride, zinc nitride, alumina, and the like. It may include at least one selected from the group consisting of a combination.

The colorant may optionally include from about 0.01 parts to about 80 parts by weight based on 100 parts by weight of the binder.

By including the content within the above range, color interference by the base layer can be sufficiently compensated, while adhesion between the base layer and the print layer can also be effectively improved.

In addition, the extender pigment may optionally include from about 0.01 parts to about 90 parts by weight based on 100 parts by weight of the binder.

By including the content within the above range, it is possible to stably form the color interference complementary layer and realize excellent workability.

For example, the average thickness of the color interference complementary layer may be formed to about 0.1㎛ to 50㎛.

By forming a thickness within the above range, the color interference complementary effect and adhesion can be sufficiently implemented without excessively increasing the thickness of the vehicle interior material.

In addition, the step of forming the color interference complementary layer may be repeated multiple times, for example, may be repeated about 1 to 20 times, but is not limited thereto.

In addition, in the above manufacturing method, a printed layer may be formed on the color interference complementary layer by using a predetermined blanket. The blanket may also be referred to as a so-called pad. The blanket and a method of manufacturing the same can use the types and methods disclosed in known prior documents. The color interference complementary layer may also be formed in the same way as the method for forming the printed layer, and may be specifically formed using a predetermined blanket.

The blanket may be, for example, a silicone rubber material, but is not limited thereto.

Further, the surface of the blanket may have a surface roughness of about 0.5 μm to about 2.0 μm, but is not limited thereto.

In addition, the blanket may have a semi-circular, conical, or angular shape in the shape of a portion in contact with the printing original plate, but is not limited thereto.

In the step of forming the printing layer, the ink is applied to a predetermined printing original plate, the ink is transferred to the blanket while pressing and removing the blanket on the printing original plate to which the ink is applied, and then the blanket to which the ink is transferred The ink can be transferred to the surface of the color interference complementation layer by pressing and then peeling off the surface of the color interference supplementation layer.

The printing disc may be formed of a material known in the art, for example, plastic, metal, wood, or the like, but is not limited thereto.

In the above production method, the ink is prepared by mixing at least two or more selected from the group consisting of photocurable resins, pigments, additives, solvent colorants, photoinitiators, tackifiers, coupling agents, surfactants, and combinations thereof, and the ink Can be applied to the printing disc.

The ink may use a kind known in the art.

The photocurable resin may include, for example, (meth) acrylic resin.

The colorant may suitably include colorants of various colors known in the art according to the purpose and use of the invention, for example, titanium dioxide colorants, zinc oxide colorants, graphite colorants, iron oxide colorants, anthra Quinone-based colorants, cobalt oxide-based colorants, and the like, but are not limited thereto.

When the surface of the base layer includes an uneven surface, the color interference complementary layer is formed by applying and curing the composition for forming the complementary layer along the surface of the base layer, so that the color interference complementary layer of the base layer It may be formed to include an uneven surface corresponding to the uneven surface included in the surface.

Accordingly, when the surface of the substrate layer includes an uneven surface, each surface that the substrate layer and the color interference complementary layer contact each other includes an uneven surface having opposite shapes, so that one surface adheres closely to the other surface. have.

In addition, according to the step of forming the printed layer when the color interference complementary layer includes an uneven surface, the printing layer is formed by applying and curing the ink composition along the surface of the color interference complementary layer, The printing layer may be formed to include an uneven surface corresponding to the uneven surface included in the surface of the color interference complementary layer.

As a result, as shown in FIG. 2, when the surface of the substrate layer includes a concave-convex surface, each surface of the color interference complementary layer and the print layer is in contact with each other by including concave-convex surfaces of opposite shapes. It can be adhered to close to the other side.

In one embodiment, the printed layer is formed to exhibit a different color from the base layer, and includes the color interference complementary layer and the print layer on a part of the upper portion of the base layer, and on the other part of the base layer It may be formed not to include the color interference complementary layer and the print layer.

Accordingly, since the portion on which the print layer is formed and the portion on which the print layer is not formed may exhibit different colors in the exterior of the vehicle interior material, the print layer is not formed on the surface of the base layer as a whole, so that the color is less. Various decorative effects can be realized while using ink.

In the manufacturing method, the step of performing a gloss coating, matt coating or both on the printed layer; may further include. Accordingly, it is possible to sufficiently protect the surface of the molded article on which the ink layer is formed, while providing a glossy or matte effect.

The gloss coating or the matte coating may include, for example, (meth) acrylic resins, epoxy resins, urethane resins, polyester resins, base resins such as fluororesin resins, gloss or matting agents, flame retardants, water repellents, antistatic agents, and It may be performed by coating a coating composition comprising at least one selected from the group consisting of.

The glossy coating or the matte coating is performed using, for example, a method such as a gravure coating method, a slot die coating method, a spin coating method, a spray coating method, a bar coating method, or a deposition coating method. It can, but is not limited to this.

The matte coating may be formed by applying and curing the composition for matte coating. The matte coating composition may include, for example, at least one resin, matting agent, curing agent, wax selected from the group consisting of acrylic-modified polyurethane polyol resins, (meth) acrylate-based resins, polyurethane resins, and combinations thereof. Diluents and the like may be included, and the matting agent may include SiO ₂ beads, TiO ₂ beads, ZnO beads, polymethyl methacrylate beads, glass beads, Teflon beads, etc., wherein the wax is paraffin wax, candelilla Wax, synthetic wax, and the like, the curing agent may include toluene diisocyanate (TDI), diphenyl methane diisocyanate (MDI), hexamethylene diisocyanate (HMDI), etc., and the diluent is methyl ethyl ketone (MEK), ethyl acetate (EAc), isopropyl alcohol (IPA), and the like, but are not limited thereto.

The glossy coating may be formed in the same way as the matte coating, and their curing conditions may be appropriately selected according to the purpose and use of the invention, and is not particularly limited.

The composition for the gloss coating may not contain a matting agent and wax compared to the composition for the matt coating.

In another embodiment of the present invention, there is provided a vehicle interior material manufactured according to the method for manufacturing the vehicle interior material.

The vehicle interior material may include, for example, a base layer; One or more primer layers; And a structure in which a printed layer is stacked, and may further include, for example, one or more color interference complementary layers between the primer layer and the printed layer. Each of the base layer, the primer layer, the color interference complementary layer, and the printed layer is as described above in one embodiment.

The substrate layer may include a molded article including a flat surface, an uneven surface, or both, or may be the molded product. 2 schematically shows a cross section of the interior material for a vehicle when the base layer includes an uneven surface.

The primer layer may have an average thickness of 0.1 μm to 50 μm, and when the plurality of primer layers are included, the total thickness of the plurality of primer layers may be about 0.1 μm to about 200 μm.

In addition, the color interference complementary layer may have an average thickness of about 0.1 μm to 50 μm, and when the plurality of color interference complementary layers are included, the total thickness of the plurality of color interference complementary layers combined is about 0.1 μm to It may be about 200㎛.

In addition, the vehicle interior material may further include a coating layer on the printed layer, the coating layer may include a glossy morting, matte coating or both.

The thickness of the coating layer may be, for example, about 0.5 μm to about 20 μm, and preferably about 1 μm to about 5 μm.

The vehicle interior material can realize excellent printing precision, excellent workability, and excellent economical efficiency, and can implement a desired pattern with a high resolution, so that it is possible to create various indoor atmospheres that meet the needs of customers, while forming the color interference complementary layer. Thus, there is an advantage that can effectively prevent the color interference phenomenon caused by the inherent color of the base layer.

The vehicle interior material may be, for example, a vehicle interior material, specifically, a center fascia, a door trim, a garnish, a console box, an armrest, or a steering wheel, but is not limited thereto. It can be applied to interior decoration materials.

Hereinafter, specific embodiments of the present invention are presented. However, the examples described below are only for specifically illustrating or describing the present invention, and the present invention is not limited thereto.

Example

Example  One

After preparing a molding composition comprising a polycarbonate resin, an acrylonitrile butadiene styrene resin, and a black pigment, the resin composition is then injected into an injection mold made of a metal material, and the temperature is about 230 ° C to about 260 ° C and about 100kgf / cm ^The substrate layer was formed by injection molding under a pressure condition of ² to about 150 kgf / cm ² to form a molded article, wherein both surfaces of the substrate layer were formed in a flat shape.

A primer layer having a thickness of 1 to 30 µm was formed by applying a composition for forming a primer layer on the upper surface of the base layer by spray coating and drying at a temperature of 60 ° C. and a time condition of 20 minutes.

Subsequently, a composition for forming a complementary layer was applied on the upper surface of the primer layer, and cured for 5 to 30 minutes at room temperature to form a color interference complementary layer having an average thickness of 1 to 30 μm.

Subsequently, a direct printing was performed using a blanket (manufactured by Shuho, Japan) on the upper surface of the color interference complementary layer to form a 0.1 to 20 μm thick print layer. In addition, the interior of the vehicle was manufactured by forming a coating layer having a thickness of 0.5 to 20 μm by performing a matt coating on the surface of the molding formed with the printed layer.

Example  2

A vehicle interior material was manufactured according to the same conditions and methods as in Example 1, except that about 60% of the entire surface of the substrate layer was formed to include an uneven shape.

At this time, the concavo-convex shape includes a convex portion and a concave portion, and the width of the concave portion is about 5 mm to about 20 mm, the depth is about 0.1 mm to about 5 mm, and the convex portion is provided on the assumption that the width of the convex portion is larger than the width of the concave portion. The width was about 5.0 mm to about 20 mm, the height was about 0.1 mm to about 10 mm, and the pitch was formed within a range of about 0.1 mm to about 10 mm.

Comparative Example 1 (no primer layer)

A vehicle interior material was manufactured under the same conditions and methods as in Example 1, except that the color interference complementary layer was formed directly on the base layer without the primer layer.

Comparative Example 1 (does not include the color interference complementary layer)

Excluding a color interference complementary layer, a printed layer was formed directly on the primer layer, and Example 2 and Example 2 except that the width of the convex portion was narrower than the width of the concave portion on the uneven surface included in the surface of the substrate layer. The vehicle interior material was manufactured under the same conditions and methods.

Experimental example

The properties of the vehicle interior materials according to Examples 1 and 2 and Comparative Examples 1 and 2 were evaluated and are shown in Table 1 below.

Assessment Methods

Experimental example  1: Interlayer adhesion and moisture resistance

Measurement method: The interior materials for vehicles according to Examples 1 and 2 and Comparative Examples 1 and 2 were put in a constant temperature and humidity chamber and left for 170 hours under a temperature of 50 ° C. and a humidity of 95% RH, and then pulled out and each layer peeled off from each other It was observed with the naked eye whether there was a missing part.

Accordingly, when there was a portion where peeling occurred, it was evaluated as inferior to the interlayer adhesion and moisture resistance, and indicated as “Χ”. When there was no portion where peeling occurred, it was evaluated as having excellent interlayer adhesion and moisture resistance, and marked as “○”. .

Experimental example  2: Color interference  phenomenon

Measurement method: In the interior materials for vehicles according to Examples 1 and 2 and Comparative Examples 1 and 2, the appearance color of each printed layer was observed with a loupe (Peak, 816) and the naked eye, respectively, and in any case, If the original color of the printed layer is not properly implemented due to the black color, color interference is indicated as “○”. If the original color of the printed layer is properly implemented, color interference does not occur. ”.

Experimental example  3: Appearance evaluation

Measurement method: For the vehicle interior material according to Example 2 and Comparative Example 2, when the appearance of the printed layer is observed with a loupe (Peak, 816), the printing accuracy is relatively high. The case where it was stably transferred to the original position is evaluated as excellent and marked with “○”, and when the printing accuracy is relatively low, for example, the ink is smeared or the case that it is not properly transferred is evaluated as inferior and “Ⅹ ”.

Interlayer adhesion and moisture resistance Color interference phenomenon
Occurrence Appearance evaluation Example 1 ○ Ⅹ - Example 2 ○ Ⅹ ○ Comparative Example 1 Ⅹ ○ - Comparative Example 2 Ⅹ Ⅹ Ⅹ

As shown in Table 1, it was confirmed that the interior materials for vehicles according to Examples 1 and 2 were excellent in interlayer adhesion and moisture resistance, and at the same time, no color interference occurred and desired color sense was realized.

On the other hand, it was confirmed that the interior materials for vehicles according to Comparative Examples 1 and 2 were peeled off, resulting in inferior interlayer adhesion and moisture resistance, and particularly, in Comparative Example 1, color interference occurred.

On the other hand, the printing layer of the vehicle interior material according to the second embodiment, the ink is not smeared during printing, is stably transferred, and the printing precision is excellent, so that a desired image can be realized at a high resolution and texture can be effectively expressed.

On the other hand, the print layer of the vehicle interior material according to the comparison 2 was forced to create an artificial atmosphere with low image resolution because the ink did not smudge or transfer properly.

100: vehicle interior material
110: printing layer 120: color interference complementary layer 130: base layer 140: coating layer
d: thickness of the printed layer P: pitch of irregularities
W ₁ : Width of convex portion W ₂ : Width of concave portion
H ₁ : Depth of concave part H ₂ : Height of convex part

Claims (16)

Forming a base layer;
Forming a primer layer on the upper surface of the base layer; And
Forming a color interference complementary layer by applying a composition for forming a supplementary layer containing a binder on an upper surface of the primer layer; And
Including the step of forming a printed layer using a blanket (blanket) on the upper surface of the color interference complementary layer;
The surface of the base layer includes an uneven surface, the uneven surface includes a concave portion and a convex portion, and the width of the convex portion is greater than the width of the concave portion,
The width of the concave portion is 0.01mm to 50mm, the depth is 0.01mm to 20mm, the width of the convex portion is 0.01mm to 200mm and the height is 0.01mm to 20mm,
The ratio of the uneven surface to the total area of the surface of the substrate layer is 30% to 60%
Method for manufacturing interior materials for vehicles.
delete According to claim 1,
The composition for forming the complementary layer containing the binder is in the group consisting of (meth) acrylic resin, urethane resin, alkyd resin, polyol, linseed oil resin, nitrocellulose, and combinations thereof Containing at least one selected
Method for manufacturing interior materials for vehicles.
According to claim 1,
The thickness of the primer layer is formed to 0.1㎛ 50㎛
Method for manufacturing interior materials for vehicles.
According to claim 3,
The composition for forming the complementary layer further includes at least one selected from the group consisting of coloring agents, extender pigments, curing agents, antioxidants, solvents, and combinations thereof.
Method for manufacturing interior materials for vehicles.
According to claim 1,
The color interference complementary layer has an average thickness of 0.1 μm to 50 μm.
Method for manufacturing interior materials for vehicles.
delete delete delete According to claim 1,
In the step of forming the printing layer, the ink is applied to a predetermined printing original plate, the ink is transferred to the blanket while pressing and removing the blanket on the printing original plate to which the ink is applied, and then the blanket to which the ink is transferred Is pressed on the surface of the color interference complementary layer and then peeled off to transfer the ink to the surface of the color interference complementary layer to perform printing.
Method for manufacturing interior materials for vehicles.
The method of claim 10,
The ink is prepared by mixing at least one selected from the group consisting of photo-curable resins, pigments, additives, solvent colorants, photoinitiators, tackifiers, coupling agents, surfactants, and combinations thereof. Applied to
Method for manufacturing interior materials for vehicles.
According to claim 1,
Further comprising; performing a glossy coating, matt coating or both on the printed layer;
Method for manufacturing interior materials for vehicles.
A vehicle interior material manufactured according to a method for manufacturing a vehicle interior material according to any one of claims 1, 3 to 6, and 10 to 12.
The method of claim 13,
Base layer; One or more primer layers; And a structure in which a printed layer is stacked.
Automotive interior materials.
The method of claim 14,
Further comprising at least one color interference complementary layer between the primer layer and the printed layer
Automotive interior materials.
The method of claim 13,
Interior materials for vehicles that are center fascia, door trim garnish, console box, armrest or steering wheel.

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