KR20230012719A - Realwood film applicable to vehicle built-in materials and its manufacturing method - Google Patents

Abstract

Provided are a real wood film applicable to interior materials for a vehicle and a preparation method thereof. The real wood film of the present invention comprises: a transparent resin layer made of a transparent material; a shielding layer disposed on a top of the transparent resin layer to block the penetration of light occurring from an inner side of the transparent resin layer; and a film layer disposed on a top of the shielding layer to include a real wood layer with a veneer texture, wherein the shielding layer includes: a heat-resistant paint layer that can prevent the film layer from being damaged by high temperature when the transparent resin layer is injected; a shielding paint layer that can block the penetration of the light occurring from the inner side of the transparent resin layer into the film layer; and an adhesive paint layer that can impart adhesion such that the shielding layer and the transparent resin layer can firmly adhere to each other.

Description

Real wood film applicable to vehicle interior materials and manufacturing method thereof

The present invention relates to a real wood film applicable to vehicle interior materials and a manufacturing method thereof.

Vehicle interior materials require a beautiful exterior and luxurious texture. Natural and real materials such as real wood, real aluminum, carbon weave, and mother-of-pearl are used as decoration materials for conventional vehicle interior materials. Among them, real wood has characteristics that can realize high-end vehicles and eco-friendly images, so it is often manufactured and used in the form of a sheet. More specifically, real wood is widely used in vehicle door trim garnishes, door trim switches, and other interior decoration parts.

Prior art related to this is Korean Patent Publication No. 10-2018-0088060 (published on August 3, 2018). This prior art press-forms sequentially stacked natural wood, adhesives, and reinforcing materials at once to form a multi-layered upper molding, and after cutting, forms a lower molding through insert injection molding to integrate with the upper molding to form an automobile interior material. Discloses a method for manufacturing and an interior material for automobiles.

The present prior art is formed of a layered structure in which a lower molding, a dimensional stability reinforcing layer, an adhesive layer, and a natural wood layer are sequentially laminated. The natural wood layer may be protected by coating a surface on top of the natural wood layer. That is, the lower molding may be installed in contact with the vehicle body, and the natural wood layer may be disposed on the surface and exposed to the outside.

However, such conventional interior materials for automobiles have limitations in their use as functional interior parts for automobiles that exhibit various functions due to lack of light transmission performance. In addition, since a separate adhesive is not used during injection molding of the real wood film for product molding, adhesion is poor, and real wood veneer has a problem in that quality is deteriorated such as discoloration and defects due to low light resistance. In addition, there is a limit to reflecting the feeling of real material only with real wood veneer.

Patent Publication No. 10-2018-0088060 (2018. 08. 03. Publication)

An object of the present invention is to provide a real wood film and a method for manufacturing the same, which can be applied to the interior material of a vehicle to realize a high-end and eco-friendly image, and have improved marketability because light transmission is possible.

According to one aspect of the present invention, a transparent resin layer formed of a transparent material; and a shielding layer disposed on the upper side of the transparent resin layer to block the transmission of light generated from the inside of the transparent resin layer; and a film layer disposed on the upper side of the shielding layer and including a real wood layer having a veneer texture, wherein the shielding layer can prevent damage to the film layer from a high temperature when the transparent resin layer is injected. a heat-resistant paint layer; and a shielding paint layer capable of blocking transmission of light generated inside the transparent resin layer to the film layer; And an adhesive paint layer capable of adding adhesiveness so that the shielding layer and the transparent resin layer can be firmly adhered; containing, a real wood film can be provided.

According to another aspect of the present invention, forming a film layer by sequentially applying a real wood layer, an adhesive layer, and a nonwoven fabric layer; and attaching a release film to the film layer; and a heat-resistant paint layer on the film layer, shielding Forming a shielding layer by sequentially applying a paint layer and an adhesive paint layer; and Laser cutting a portion of the shielding layer to form a laser processing unit; And Using a preforming mold to perform preforming and trimming. and inserting the film layer and the shielding layer to which the release film is attached to a mold; and forming a transparent resin layer by injecting a resin of a transparent material into the mold; and removing the release film from the film layer. removing; And forming a top coat layer covering the film layer; a manufacturing method of a real wood film comprising a may be provided.

A real wood film applicable to interior materials for vehicles and a manufacturing method thereof according to embodiments of the present invention configures a shielding layer with an adhesive paint layer, a shielding paint layer, and a heat-resistant paint layer, so that the adhesiveness is improved and the film layer is protected from high temperatures. can protect In addition, a part of the adhesive paint layer and the shielding paint layer may be laser-cut to form a laser-processed part, thereby applying a light transmissive part. In addition, a top coat layer is coated on top of the film layer, so that the wood texture of the film layer can be improved. Discoloration of the film layer can be prevented by the light resistance of the top coat layer. In addition, the emotional quality of the vehicle can be improved by applying the real wood film having a wood veneer texture as an interior part of the vehicle.

1 is a cross-sectional view of a real wood film according to an embodiment of the present invention.
Figure 2 is a block diagram showing a manufacturing method of the real wood film shown in Figure 1.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be noted that the following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited to the following examples. The following embodiments are provided to more completely explain the present invention to those with average knowledge in the relevant technical field, and detailed descriptions are given for well-known configurations that may unnecessarily obscure the technical gist of the present invention. to omit

1 is a cross-sectional view of a real wood film according to an embodiment of the present invention.

Referring to FIG. 1, the real wood film 100 of this embodiment may be formed such that a transparent resin layer 110, a shielding layer 120, a film layer 130, and a top coat layer 140 are sequentially stacked. . The real wood film 100 can be applied to the interior material of a vehicle to improve the emotional quality of the vehicle. More specifically, the real wood film 100 may be applied to a door trim garnish, a door trim switch, and other interior decoration parts of a vehicle. A touch-type switch is placed on the real-wood film 100 by disposing a light-transmitting touch-type part inside the real-wood film 100 and laser cutting a part of the shielding layer 120 so that light can be transmitted in a unique shape. can be applied

Specifically, the real wood film 100 of this embodiment includes a transparent resin layer 110 capable of molding a light transmissive part, a shielding layer 120 capable of blocking light, and a film layer 130 capable of expressing a wood texture and a top coat layer 140 that may be coated on top of the film layer 130.

The transparent resin layer 110 is disposed at the bottom of the real wood film 100, and may be formed of a transparent material. A light transmissive part (not shown) may be molded on the transparent resin layer 110 , or a light transmissive part may be disposed inside the transparent resin layer 110 . For example, all or part of the transparent resin layer 110 is made of polycarbonate, styrene acrylonitrile, polymethyl methacrylate, polypropylene, polyethylene, and PETG. (Glycol Modified Polyethylene Terephthalate). Since the transparent resin layer 110 is injected at a high temperature, a heat-resistant paint layer 123 may be disposed on the shielding layer 120 to prevent the film layer 130, which will be described later, from being damaged by the high temperature.

The light transmissive component (not shown) may be disposed inside the transparent resin layer 110 or included in the transparent resin layer 110 . The light-transmitting part may be interlocked with a controller (not shown) of the vehicle to adjust the temperature of the seat, connect to Bluetooth, and adjust the lock state of the vehicle. The light transmissive part emits light for each control button, so that the user can recognize the position of the button.

More specifically, a touch-type switch (not shown) that can be used by a user in a touch-type manner is disposed on the surface of the real wood film 100, and the touch-type switch is interlocked with a light transmissive part to provide illumination through a user's touch manipulation. Transmissive parts can be manipulated. For example, a touch type switch is included in the real wood layer 133 and can detect a user's touch. The touch type switch is disposed at a position corresponding to the laser processing unit 120a so that the user can determine the location of the touch type switch through light transmitted through the laser processing unit 120a. Preferably, the touch type switch may be disposed below the real wood layer 133 and not exposed to the outside, or may be formed of a transparent material to have a neat and beautiful appearance.

The shielding layer 120 is disposed on top of the transparent resin layer 110, and may be formed of a material capable of blocking light. The shielding layer 120 is disposed between the transparent resin layer 110 and the film layer 130 to be described later to prevent light introduced through the transparent resin layer 110 from being transmitted to the film layer 130. there is. For example, when a light-transmitting component is disposed inside the transparent resin layer 110, a certain portion of the shielding layer 120 is removed by laser cutting the shielding layer 120 into a unique shape, and light transmits through the deleted portion. It can be. Specifically, the shielding layer 120 protects the adhesive paint layer 121 for bonding with the transparent resin layer 110, the shielding paint layer 122 capable of blocking light, and the film layer 130 to be described later from high temperatures. A heat-resistant paint layer 123 may be included.

The adhesive paint layer 121 may be disposed between the transparent resin layer 110 and the shielding paint layer 122 to adhere the shielding paint layer 122 to the transparent resin layer 110 . In detail, the conventional real wood film 10 has a problem of poor adhesiveness because a separate adhesive for attaching the transparent paint layer 12 and the shielding paint layer 11 is not used. However, in the real wood film 100 of this embodiment, an adhesive paint layer 121 is added between the transparent resin layer 110 and the shielding paint layer 122, so that the transparent resin layer 110 and the shielding paint layer 122 ) can be improved compared to the prior art.

The shielding paint layer 122 may be attached to the transparent resin layer 110 by the adhesive paint layer 121 . The shielding paint layer 122 is formed of a material capable of blocking light, and light introduced through the transparent resin layer 110 can be blocked.

The heat-resistant paint layer 123 is disposed on top of the shielding paint layer 122 to protect the film layer 130, which will be described later, from high temperatures. For example, since the temperature is very high when the transparent resin layer 110 is injected, the heat-resistant paint layer 123 may be disposed to prevent the film layer 130 from being deformed by the high temperature. Preferably, a paint having a high molecular weight may be used for the heat-resistant paint layer 123 .

In addition, when the light transmissive component is disposed inside the transparent resin layer 110, a portion of the shielding layer 120 may be laser cut into a unique shape and removed. Preferably, among the shielding layer 120, the adhesive paint layer 121 and the shielding paint layer 122 may be laser cut to form a laser-processed part 120a. That is, light generated inside the transparent resin layer 110 is transmitted through the laser processing unit 120a so that the film layer 130 emits light in a unique shape.

Meanwhile, the film layer 130 is disposed on top of the shielding layer 120 and may be formed in a wood veneer texture. Specifically, the film layer 130 is a non-woven fabric layer 131 as a reinforcing member, an adhesive layer 132 capable of attaching the non-woven fabric layer 131 and the real wood layer 133, and real wood formed of a wood veneer texture sheet. Layer 133 may be included.

The nonwoven fabric layer 131 may be attached to the real wood layer 133 through an adhesive layer 132 . The non-woven fabric layer 131 is attached to the real wood layer 133 to prevent breakage of the real wood layer 133 and maintain the preformed shape, and can serve as a reinforcing member capable of reinforcing the real wood layer 133. . For example, during the manufacturing process of the real wood film 100, the nonwoven fabric layer 131 may absorb moisture and dry. Preferably, the non-woven fabric layer 131 is formed to be as thin and light as possible to minimize curling.

For example, all or part of the nonwoven fabric layer 131 may be formed by one or more of chemical bonding, needle punching, spunlace, calendering, melt brown, spunbond, and airlaid processes. More specifically, the nonwoven fabric layer 131 includes at least one of glass fibers, carbon fibers, polyester fibers, polyamide fibers, polyurethane fibers, acrylic fibers, polyolefin fibers, polyethylene terephthalate fibers, cellulose fibers, and pulp fibers. It can be formed into a composition. The nonwoven fabric layer 131 may have a weight of 10 to 100 g/m ² .

The adhesive layer 132 may be disposed between the nonwoven fabric layer 131 and the real wood layer 133 to adhere the nonwoven fabric layer 131 and the real wood layer 133 .

The real wood layer 133 may be formed of a wood veneer textured sheet. For example, the real wood layer 133 may be formed of wood veneer thinly laminated with natural wood or may include laminated veneer obtained by integrating and cutting natural wood. Preferably, the real wood layer 133 is formed with a thin thickness, so that light introduced through the laser processing unit 120a can be seen through. Preferably, the real wood layer 133 may be formed to a thickness of 0.1 to 0.5 mm.

More specifically, the real wood layer 133 is disposed on top of the film layer 130 that can be seen by the user, so that the emotional quality of the vehicle can be improved. The real wood layer 133 may absorb moisture and dry over time due to the nature of the wood material. Therefore, a release film may be used to prevent the real wood layer 133 from being curled during the manufacturing process of the real wood film 100 .

That is, in the real wood film 100 of this embodiment, among the shielding layer 120, only the shielding paint layer 122 and the adhesive paint layer 121 selectively form the laser processing part 120a, so that the transmitted light passes through the film layer. (130). At this time, since the film layer 130 is not laser-cut, a separate shape does not appear on the film layer 130 when the light transmissive part does not emit light, and when the light transmissive part emits light, the film layer ( 130), light may be emitted in the shape of the laser processing unit 120a. That is, the real wood film 100 of this embodiment may have a clean and beautiful appearance because the shape of the laser processing unit 120a does not always appear, but only when a touch-type switch is needed or used.

Meanwhile, the top coat layer 140 may be disposed on top of the real wood layer 133 so that the real wood layer 133 is not directly exposed. The top coat layer 140 is formed of a transparent or semi-transparent material, so that light transmission is possible so that the real wood layer 133 can be seen from the outside. In addition, the top coat layer 140 is formed of a material having light resistance, so that discoloration of the real wood layer 133 can be prevented. The top coat layer 140 is coated on the curved portion formed on the surface of the real wood layer 133, so that the wood texture of the real wood layer 133 can be further improved. More specifically, since the real wood layer 133 may absorb moisture and dry due to the nature of the wood material, the top coat layer 140 is applied to the surface of the real wood layer 133 to obtain a real wood layer ( 133) is prevented from being directly exposed to the outside, and moisture is prevented from being absorbed into the real wood layer 133, so that deformation of the real wood layer 133 can be prevented.

Preferably, the top coat layer 140 may be formed in a two-component type by mixing a base material and a curing agent. More specifically, it may include at least one of urethane paint, acrylic paint, epoxy paint, and polyester-based paint, and may be formed by mixing a curing agent or thinner with the paint.

For example, the top coat layer 140 may include protrusions or patterns on its surface. On the surface of the top coat layer 140, there are repetitive circular or polygonal protrusions or stripes. By including a pattern shape such as a checkered pattern, slipping can be prevented and a grip feeling can be improved when a user touches.

On the other hand, the real wood film 100 of this embodiment may include a sensor unit (not shown). The sensor unit may be disposed on the film layer 130 or disposed close to the film layer 130 . The sensor unit is interlocked with a light transmissive component (not shown), so that when a user approaches the real wood film 100 closely, the sensor unit detects and emits light from the light transmissive component. For example, when a user brings his/her hand close to the real-wood film 100 to manipulate the real-wood film 100, the sensor unit recognizes the hand and transmits a signal to the light-transmitting part so that light is emitted to the laser processing unit ( Light may be emitted through 120a). That is, in normal times, no light is emitted to the real wood layer 133, so it can have a clean and beautiful appearance, and when the user tries to operate the touch-type switch through the light transmission type part, light is emitted so that the user can recognize the switch. can

Figure 2 is a block diagram showing a manufacturing method of the real wood film shown in Figure 1.

Referring to Figure 2, the manufacturing method of the real wood film 100 of this embodiment is described as follows.

First, the film layer 130 is formed by sequentially stacking the nonwoven fabric layer 131, the adhesive layer 132, and the real wood layer 133 (S-1). A release film (not shown) is attached to the film layer 130 (S-2). The heat-resistant paint layer 123, the shielding paint layer 122, and the adhesive paint layer 121 are sequentially applied to the next stage of the nonwoven fabric layer 131 of the film layer 130 to form the shielding layer 120 (S -3). By laser cutting the shielding layer 120, parts of the adhesive paint layer 121 and the shielding paint layer 122 of the shielding layer 120 are cut into a unique shape, and a laser processing part 120a is formed in the shielding layer 120. Form (S-4).

Using a pre-forming mold, pre-forming and trimming of the film layer 130 and the shielding layer 120 are performed (S-5). The film layer 130 and the shielding layer 120 to which the release film is attached are inserted into the mold (S-6). A transparent resin layer 110 is formed on the next stage of the shielding layer 120 by injecting a transparent resin into the mold (S-7). The release film is removed from the film layer 130 (S-8). A top coat layer 140 covering the film layer 130 is formed on the upper side of the film layer 130 (S-9) to complete the real wood film 100.

At this time, the release film may be attached during the manufacturing process to prevent the phenomenon of absorbing moisture and drying over time due to the nature of the real wood layer 133 . For example, since the degree of shrinkage of the real wood layer 133 and the nonwoven fabric layer 131 is different for each temperature, the phenomenon of curling during the manufacturing process may become more severe. When manufacturing the real wood film 100, since defects may occur during processing due to curling of the film layer 130, this should be minimized. That is, in order to prevent the real wood layer 133 from curling, a release film may be attached during the manufacturing process of the real wood film 100 and removed before applying the top coat layer 140 .

As described above, the real wood film applicable to the vehicle interior material and the manufacturing method thereof according to the embodiments of the present invention configure the shielding layer with an adhesive paint layer, a shielding paint layer, and a heat-resistant paint layer, so that the adhesiveness is improved, It can block light and protect the film layer from high temperatures. The adhesive paint layer may be disposed between the shielding layer and the transparent resin layer to provide adhesiveness so that the shielding paint layer and the heat-resistant paint layer can be firmly adhered to the transparent resin layer. On the other hand, during injection molding of the transparent resin layer, it is injected at a high temperature, but damage to the film layer by the transparent resin layer melted by the heat-resistant paint layer can be prevented.

In addition, a part of the adhesive paint layer and the shielding paint layer may be laser-cut to form a laser-processed part, thereby applying a light transmissive part. Part of the adhesive paint and shielding paint layer can be removed in a unique shape. Light is selectively transmitted through the laser-processed part of the adhesive paint and the shielding paint, so that the light-transmitting part can be disposed.

In addition, since the top coat layer is coated on top of the film layer, the wood texture of the film layer is improved, and discoloration of the film layer can be prevented by the light resistance of the top coat layer.

In addition, a real wood film with a wood veneer texture can be applied as an interior part of a vehicle to improve the emotional quality of the vehicle. For example, real wood film can be applied to the interior and decoration parts of a vehicle, so that the interior of the vehicle can be implemented in a high quality and eco-friendly manner. In addition, a light transmission type part is disposed inside the real wood film, and a touch type switch capable of controlling the vehicle by touching the real wood film is applied, so that the inside of the vehicle can be easily controlled.

Although the embodiments of the present invention have been described above, those skilled in the art can add, change, delete, or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention can be variously modified and changed by the like, and this will also be said to be included within the scope of the present invention.

100: real wood film 110: transparent resin layer
120: shielding layer 120a: laser processing unit
121: adhesive paint layer 122: shielding paint layer
123: heat-resistant paint layer 130: film layer
131: non-woven fabric layer 132: adhesive layer
133: real wood layer 140: top coat layer

Claims (6)

A transparent resin layer 110 formed of a transparent material;
a shielding layer 120 disposed on the upper side of the transparent resin layer 110 to block transmission of light generated inside the transparent resin layer 110; and
A film layer 130 disposed on the upper side of the shielding layer 120 and including a real wood layer 133 having a veneer texture;
The shielding layer 120,
a heat-resistant paint layer 123 capable of preventing damage to the film layer 130 from high temperatures when the transparent resin layer 110 is injected;
a shielding paint layer 122 capable of blocking light generated inside the transparent resin layer 110 from being transmitted through the film layer 130; and
A real wood film comprising: an adhesive paint layer 121 capable of adding adhesiveness so that the shielding layer 120 and the transparent resin layer 110 can be firmly bonded. The method of claim 1,
A top coat layer disposed on the surface of the film layer 130 and formed of a material having light resistance to prevent discoloration of the film layer 130 and improve the texture of the real wood layer 133 ( 140); further comprising a real wood film. The method of claim 1,
The transparent resin layer 110,
All or part of one or more of Polycarbonate, Styrene Acrylonitrile, Polymethyl Methacrylate, Polypropylene, Polyethylene and PETG (Glycol Modified Polyethylene Terephthalate) Characterized in that the injection molding, including a real wood film. The method of claim 1,
The shielding layer 120,
A laser processing unit 120a for processing a portion of the shielding layer 120 to be deleted so that the light generated inside the transparent resin layer 110 can be transmitted to the film layer 130; , Realwood Films. The method of claim 2,
The top coat layer 140,
A real wood film comprising at least one of urethane paint, acrylic paint, epoxy paint, and polyester-based paint, and formed by mixing a curing agent or thinner with the paint. In producing the real wood film disclosed in claim 1,
Forming a film layer 130 by sequentially applying the real wood layer 133, the adhesive layer 132, and the nonwoven fabric layer 131 (S-1);
attaching a release film to the film layer 130 (S-2);
forming a shielding layer 120 by sequentially applying a heat-resistant paint layer 123, a shielding paint layer 122, and an adhesive paint layer 121 to the film layer 130 (S-3);
Forming a laser processing part 120a by laser cutting a portion of the shielding layer 120 (S-4);
Performing preforming and trimming using a preforming mold (S-5);
inserting the film layer 130 and the shielding layer 120 to which the release film is attached into a mold (S-6);
Forming a transparent resin layer 110 by injecting a resin of a transparent material into the mold (S-7);
removing the release film from the film layer 130 (S-8); and
Forming a top coat layer 140 covering the film layer 130 (S-9); manufacturing method of a real wood film, including.

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