KR20200121581A - Plastic parts including concealed lighting projection region and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a plastic part including a concealed lighting projection unit, which allows the lighting projection unit to shine only when a light is turned on while making the lighting projection unit not to be visually recognized from the outside when a light included in the plastic part is turned off, and to a method of manufacturing the same.

Description

Plastic parts including concealed lighting projection region and manufacturing method thereof

The present invention relates to a plastic component in which the illumination projection unit is concealed so that the illumination projection unit included in the plastic component is not visible from the outside when the illumination is turned off, and the illumination projection unit shines only when the illumination is on, and a manufacturing method thereof.

Conventional plastic parts including a lighting projection unit have the effect that when applying lighting, the part corresponding to the shape of characters, pictures, symbols, etc. (hereinafter, the illumination projection unit) shines brightly, so that it has excellent visibility and an aesthetic function. Even in the turned off state, the shape of the illumination projection was visible from the outside, so there was a problem that the appearance was not neat when the lighting was turned off.

Republic of Korea Patent Registration No. 10-0921306 has a coating layer formed on the upper surface and a combination of pictures or characters and pictures on the lower surface, but prints a logo part formed by spraying ink of a predetermined color on the rest of the area except for the area where characters or pictures will be generated. A decorative device for a door scuff including a pattern member and a lighting means is disclosed, but this is a problem in that the logo portion is transparent or translucent, and the logo portion is visually confirmed even when the lighting is turned off, so that the appearance is not neat.

The present invention was conceived to solve the above problems, and the appearance of the illumination projection part, which is a part corresponding to the shape of a letter, picture, or symbol included in a plastic part, is not easily visible with the naked eye when the lighting is off. Its purpose is to provide a plastic part that is clean and luxurious, and provides a different aesthetic by realizing a different appearance in both the off and on the lights, and thus has excellent aesthetics.

As a means for solving the aforementioned problems,

The plastic part in which the illumination projection part of the present invention is concealed includes a substrate, a shielding coating surface formed on the upper surface of the substrate, a concealing coating surface formed on the upper surface of the shielding coating surface, and a clear coating surface formed on the upper surface of the concealed coating surface. , The shielding painting surface is characterized in that it comprises a shielding painting portion and an illumination projection.

In addition, the concealed painted surface is characterized in that it contains more than 0% by weight and 5% by weight or less of the pigment.

In addition, the shielding coating surface is characterized in that the thickness is 8 to 12㎛.

In addition, the concealed painted surface is characterized in that the thickness is 4 to 8㎛.

In addition, the clear coating surface is characterized in that the thickness is 20 to 26㎛.

In addition, the concealed painted surface includes a pigment, and the particle size of the pigment is characterized in that 200 to 400 nm.

In addition, the shielding coating surface and the concealing coating surface are characterized in that they contain pigments of the same color.

In addition, the color is characterized in that black.

The method of manufacturing a plastic part in which the illumination projection part of the present invention is concealed comprises the steps of: (1) forming a shielding coating surface on one surface of a substrate; (2) forming an illumination projection part by etching a part of the shielding painted surface with a laser; (3) forming a concealed painted surface on the shielding painted surface; And And (4) forming a clear painted surface on the top of the concealed painted surface.

In addition, it characterized in that it further comprises a; suction and discharge the residue of the shielding paint generated by the laser etching after the step (2) by a vacuum suction machine.

In addition, the concealed painted surface is characterized in that it contains more than 0% by weight and less than 5% by weight of the pigment and the remainder of the clear.

In the plastic part in which the lighting projection part of the present invention is concealed, the lighting projection part corresponding to the shape of characters, pictures, symbols, etc. is concealed when the lighting is off, so that it is not easily confirmed with the naked eye. A symbol or the like appears.

Therefore, when the lighting is off, characters or designs are not exposed on the exterior of the plastic part, so that the appearance is clean and luxurious.

Only when the light is on, the light passes through only the text or design shape from the outside, so the visibility and readability of the text are excellent in both daytime and nighttime, and information transmission is effective.

In addition, different aesthetics are provided by implementing different appearances when the lights are turned off and on, and thus, the aesthetics are also excellent.

The plastic parts of the present invention can be applied to various parts, such as the exterior of a home appliance, a button cover, and an automobile part, and there are no restrictions on the use, application part, or size.

1 is a cross-sectional view schematically showing the configuration of a plastic part according to the present invention.
2 is a cross-sectional view schematically illustrating a case in which a light source is coupled to a plastic part according to the present invention.
3 is an exemplary view showing plastic parts in a state in which (a) lights are turned off and (b) lights are turned on in the prior art.
4 is an exemplary view showing a plastic part in a state in which (a) the lighting is turned off and (b) the lighting is turned on according to the present invention.
5 is an image showing a plastic part in a state in which (a) the lighting is turned off and (b) the lighting is turned on according to the present invention.
6A to 6E are images showing the amount of concealment according to the change in the pigment content of the concealed painted surface of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the drawings, the thicknesses are enlarged to clearly express various layers and regions. In addition, the thicknesses of some layers and regions are exaggerated in the drawings for convenience of description.

Plastic parts

The plastic part according to the present invention is made using a thermoplastic resin or a thermosetting resin, which is a polymer compound made by combining raw materials extracted from petroleum, and refers to all articles used in parts of machinery and machinery. The plastic part according to the present invention is not limited in its use, and can be applied to all fields in which plastic can be used, such as home appliances, furniture, and automobile interior materials.

1 is a cross-sectional view showing a laminated structure of a plastic component 100 of the present invention.

The plastic part 100 in which the illumination projection part of the present invention is concealed includes a substrate 10, a shielding coating surface 20 formed on the upper surface of the substrate 10, and a concealing coating surface formed on the upper surface of the shielding coating surface 20 ( 30) and a clear painting surface 40 formed on an upper surface of the concealed painting surface 30, and the shielding painting surface 20 includes an illumination projection part 21 and a shielding painting part 22.

The plastic component 100 according to the present invention comprises a substrate 10. The substrate 10 is preferably a transparent material through which light can be transmitted. The substrate 10 may include at least one selected from polyethylene terephthalate (PET), glycol modified polyethylene terephthalate (PET-G), and polycarbonate (PC).

A shielding coating surface 20 is laminated on the upper surface of the substrate 10. The shielding coating surface 20 is formed by curing a shielding paint to which a large amount of pigment is added. A black pigment may be used as an example of the pigment included in the shielding coating surface 20, and the black pigment may include carbon black, titanium dioxide, and an extender pigment.

The shielding painted surface 20 includes an illumination projection 21 that is a portion etched through laser processing. The illumination projection unit 21 is an area that allows light irradiated to the plastic part 100 to be transmitted, and the surface of the substrate 10 is exposed because the shielding paint has been peeled off, so that it is transparent. It is etched into the shape of.

The shielding painting surface 20 includes a shielding painting part 22. A portion of the shielding painting surface 20 excluding the illumination projection part 21 is a shielding painting part 22, and the shielding painting part 22 serves to block light irradiated from an external light source, It blocks light from leaking to other parts other than the part to be expressed such as symbols.

The thickness of the shielding coating surface 20 is 8 to 12 μm. If it is less than 8㎛, the light shielding effect is insufficient, and if it is more than 12㎛, the shielding effect is better, but the remaining residue of the shielding paint remains as thick as the thickness during laser processing, so that smooth work cannot be achieved.

A concealed coating surface 30 is stacked on the upper surface of the shielding coating surface 20. The concealed coating surface 30 is formed by curing a concealed coating in which a small amount of pigment is added. The concealing paint may be filled in the illumination projection part 21, which is a portion of the shielding painting surface 20 etched by a laser.

The concealed painted surface 30 contains more than 0% by weight and 5% by weight or less of the pigment, and includes clearing the balance. The clear may include at least one of acrylic resin and vinyl resin. As the content of the pigment contained in the concealing painting surface 30 increases, the concealing effect of the shape of the illumination projection unit 21 becomes excellent, so that more pigment may be added to increase the hiding power, and the content is Is not limited to However, when the content of the pigment contained in the concealed painting surface 30 is too high, a problem of serving as a light-shielding layer more than the concealing effect appears, and thus it can be adjusted to be included within an appropriate range.

Black pigment may be used as the pigment, and the blackout effect can be maximized and the hiding effect can be enhanced by using the same color as the pigment included in the shielding coating surface. In this case, the color is preferably black because it has excellent light-shielding properties. As the pigment, pigments of various colors other than black may be used, or two or more types of pigments may be used to exhibit patterns such as color blur and color classification.

As an embodiment of the pigment used in the concealed coating surface 30, a black colorant may be used, and the pigment included in the concealed coating surface 30 serves to reduce the amount of light transmitted from an external light source.

The concealed coating surface 30 according to the present invention plays a role of concealing the shape of the illumination projection unit 21 so that it is not easily visible from the outside, whereas, unlike the shielding coating surface 20, it must be able to transmit light. . Therefore, unlike the shielding painting surface 20, by using only a small amount of pigment, it is preferable to show only 50 to 70% of the light shielding performance assuming that the shielding painting part 22 has 100% light shielding performance.

The pigment included in the concealed painting surface 30 is preferably a nano-sized, preferably 200 to 400 nm, in order not to feel a particle sensation by light passing through the illumination projection 21. When the particle size of the pigment is in the range of 200 to 400 nm, even when light is irradiated by a light source, the particle sensation of the pigment included in the concealed coating surface 30 is not felt, so the appearance is excellent.

The concealed painting surface 30 may further include a solvent. The solvent may include at least one selected from ketone-based and ester-based solvents.

The thickness of the concealed painted surface 30 is 4 to 8 μm. If it is less than 4 μm, the concealing effect of the illumination projection unit 21 is lowered, and when it is more than 8 μm, the light is not easily transmitted to the illumination projection unit 21 by implementing a shading performance other than the hiding power.

As the thickness of the concealed coating surface 30 increases within the above range, the concealing power becomes excellent. Therefore, it is desirable to form the concealed painting surface 30 by robot painting to make the thickness uniform.

A clear painting surface 40 is stacked on the upper surface of the concealed painting surface 30. The clear paint surface 40 is formed by curing a clear paint. The clear painted surface 40 may include a resin such as an acrylate oligomer and an acrylate monomer.

The clear painting surface 40 is intended to improve the appearance of plastic parts to increase marketability, and has light resistance, chemical resistance, and scratch resistance to protect the concealed painting surface 30 from being damaged, and it is colorless and transparent so that light passes through it. It has the effect of realizing a glossy gloss (high gloss gloss effect) and blocking ultraviolet rays.

The thickness of the clear painted surface 40 is 20 to 26 μm. If the thickness is less than 20㎛, the protection and UV blocking effect of the concealed paint surface 30 is poor, and the glossiness and smoothness are deteriorated. If the thickness is more than 26㎛, the thickness of the clear paint surface becomes excessively thick due to excessive use. Appearance defects such as pooling or condensation of paint occur.

The shielding coating surface 20, the concealed coating surface 30 and the clear coating surface 40 of the present invention may further include an additive. The additive may be used in an effective amount within a range not impairing the advantageous aspects of the present invention, examples of which include a dispersant, a photoinitiator, a leveling agent, a UV additive, and the like.

2 is a cross-sectional view showing a case in which the light source 50 is coupled to the plastic part of the present invention.

The light source 50 is not limited as long as it emits light such as illumination. The light source 50 is preferably an LED (Light Emitting Diode), and serves to irradiate light to the plastic component 100.

The light source 50 may be laminated on the lower surface of the substrate 10 or may be coupled through an adhesive means such as an adhesive tape.

The light from the light source 50 passes through the substrate 10, passes through the illumination projection unit 21 of the shielding coating surface 20, and then passes through the concealed coating surface 30 and the clear coating surface 40. It is visualized by emitting light from the outside of the plastic part 100 in the form of letters, pictures, and symbols.

3 is an exemplary view showing a case where the light of a conventional plastic panel is turned off and the light is turned on. As shown in (b) of FIG. 3, when the light is turned on, the character part contained in the plastic part emits light and can be identified by the naked eye. As shown in (a) of FIG. 3, the character part can be identified even when the light is turned off. I did.

In contrast, when the lighting of the plastic panel 100 of the present invention of FIG. 4 is turned off and the lighting is turned on, the character part is concealed when the lighting is turned off as shown in FIG. 4 (a). Although the part is not clearly identified, the character part emits light only when the light is turned on, as shown in FIG. 4B, so that it can be clearly identified with the naked eye. Specifically, FIG. 5 shows an actual image when the lighting of the plastic panel 100 of the present invention is turned off and when the lighting is turned on, and the plastic part 100 of the present invention is illuminated as shown in FIG. 5(a). In the turned off state, it is only seen as a single-colored plastic part, but it can be seen that the numeric part emits light and becomes visible only when the illumination is turned on as shown in FIG. 5B.

Manufacturing method of plastic parts

In one embodiment according to the present invention, (1) forming a shielding coating surface 20 on one surface of the substrate 10; (2) forming an illumination projection part 21 by etching a part of the shielding painted surface 20 with a laser; (3) forming a concealed coating surface 30 on the upper part of the shielding coating surface 20; And (4) forming a clear painted surface 40 on the concealed painted surface 30; It provides a manufacturing method of the plastic part 100 including the illumination projection is concealed.

The illumination projection part 21 is formed by peeling off the shielding paint by laser etching the shielding painting surface 20 in the shape of letters, pictures, symbols, etc. Laser etching has the advantage of excellent process efficiency because the processing speed is high. The laser etching may be performed using a known method without limitation.

The method of manufacturing a plastic part in which the illumination projection part is concealed according to the present invention includes the steps of suctioning and discharging the residue of the shielding paint generated by laser etching after the step (2) by a vacuum suction device; It may further include.

The concealed painted surface contains more than 0% by weight and less than 5% by weight of pigment and the balance of clear. The clear may include at least one of acrylic resin and vinyl resin. As the content of the pigment contained in the concealing painting surface 30 increases, the concealing effect of the shape of the illumination projection unit 21 becomes excellent, so that more pigment may be added to increase the hiding power, and the content is Is not limited to However, when the content of the pigment contained in the concealed painting surface 30 is too high, a problem of serving as a light-shielding layer more than the concealing effect appears, and thus it can be adjusted to be included within an appropriate range.

Hereinafter, the present invention will be described in detail through specific examples, and these examples are for illustrative purposes only and should not be construed as limiting the scope of the present invention.

Example

5 to 8% by weight of carbon black, 1 to 2% by weight of titanium dioxide and 15 to 20% by weight of extender pigment on a substrate containing other permeable raw materials such as transparent PC (Poly Carbonate) or PET-G (glycol modified polyethylene terephthalate) A black pigment containing and a shielding paint containing 15 to 20% by weight of an acrylic resin were mixed in a 10:1 weight ratio and applied, and cured at 80° C. for 40 minutes to form a shielding coated surface having a thickness of 10 μm.

The shielding coating surface is irradiated with a laser to remove the shielding coating in the shape of numbers '3' and '2', so that the surface of the substrate is exposed. On top of that, resins including acrylic resins and vinyl resins, and particle sizes of 200 to 400 A masking paint containing 0 to 5% by weight of a black colorant pigment of nm is applied and cured at 25° C. for 8 minutes to form a concealed coating surface having a thickness of 5 μm.

Apply a clear paint containing an acrylate oligomer and an acrylate monomer on the concealed painted surface, pre-heat at 60° C. for about 4 minutes, and then UV cure at a peak power of 200 mW and an amount of light of 2,000 J/cm ² . Plastic parts are completed by forming a clear painted surface with a thickness of 25㎛.

Tables 1 and 6 show the amount of concealment of the illumination projection unit according to the pigment content of the concealed painted surface of the plastic part manufactured according to the above example.

division a b c d e Pigment content of the concealed painted surface (% by weight) 0 1.25 2.5 3.75 5 Concealment amount ^* (%) 0 25 50 75 100

* The amount of concealment is based on a visual measurement, and the amount of concealment is set to 0% when 0% by weight of the pigment is contained on the concealed coating surface, and 100% when the amount of concealed is contained in 5% by weight of the pigment. The relative hiding amount according to the change in the pigment content is shown in %.

As can be seen in Tables 1 and 6, as the content of the pigment included in the concealed painted surface 30 increases, the concealing effect of the illumination projection unit is excellent.

10: description
20: shielding painted surface
21: light projection unit
22: shielding coating part
30: concealed painted surface
40: clear painting surface
50: light source
100: plastic parts

Claims (11)

A substrate, a shielding coating surface formed on the upper surface of the substrate, a concealed coating surface formed on the upper surface of the shielding coating surface, and a clear coating surface formed on the upper surface of the concealed coating surface, wherein the shielding coating surface is a shielding coating part and a light projection A plastic part in which the illumination projection part is concealed, comprising a part.
The plastic part according to claim 1, wherein the concealed painted surface comprises more than 0% by weight and less than 5% by weight of pigment and the balance of clear.
The plastic part of claim 1, wherein the shielding coating surface has a thickness of 8 to 12 μm.
The plastic part of claim 1, wherein the concealed painted surface has a thickness of 4 to 8 μm.
The plastic part of claim 1, wherein the clear painted surface has a thickness of 20 to 26 μm.
The plastic part of claim 1, wherein the concealed painted surface contains a pigment, and the particle size of the pigment is 200 to 400 nm.
The plastic component of claim 1, wherein the shielding paint surface and the hidden paint surface contain pigments of the same color.
8. The plastic part of claim 7, wherein the color is black.
(1) forming a shielding coating surface on one surface of the substrate;
(2) forming an illumination projection part by etching a part of the shielding painted surface with a laser;
(3) forming a concealed painted surface on the shielding painted surface; And
(4) Forming a clear painting surface on the top of the concealed painting surface; The method of manufacturing a plastic part concealed lighting projection comprising a.
The method of claim 9, further comprising: suctioning and discharging the residue of the shielding paint generated by laser etching after the step (2) by a vacuum aspirator; .
10. The method according to claim 9, wherein the concealed painted surface contains more than 0% by weight and less than 5% by weight of pigment and clear of the remainder.

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