KR20230000503A - Plastic parts and method for manufacturing the same - Google Patents

Abstract

Disclosed are a plastic part capable of manifesting an excellent sensation of decoration and a luxurious design pattern, solving a delamination issue between a printing layer and a plating layer, and having excellent reliability, and a manufacturing method thereof. In accordance with the present invention, the manufacturing method of the plastic part includes the following steps of: (a) preparing a base material; (b) forming a printing layer on the base material; (c) forming a plating layer in a state in which the printing layer is half-dried; and (d) forming a protective layer on the plating layer, wherein the step (c) of forming the plating layer in the state in which the printing layer is half-dried includes the following steps of: (c1) forming a first plating layer by performing chemical plating on the half-dried printing layer; and (c2) forming a second plating layer by electrical plating on the first plating layer.

Description

Plastic parts and manufacturing method thereof {PLASTIC PARTS AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to a plastic part in which a plating layer is formed by chemical plating and electroplating in a state in which a printed layer is semi-dried, and a manufacturing method thereof.

Plastic parts made of synthetic resin are widely used in automobile interiors and exteriors and various home appliances.

Plastic parts are manufactured to have a metal pattern or a metal pattern in order to present a sense of decoration and various designs. For example, a plastic part may be manufactured by sequentially forming a metal layer and a printing layer on a base material, forming patterns and patterns using etching or laser irradiation, and forming a protective layer.

However, when metal patterns and patterns are formed using etching or laser irradiation, there is a problem in that reliability and decorativeness are deteriorated because lifting occurs between the metal layer and the printed layer during laser irradiation. In addition, there are disadvantages in that the appearance of the injected product is flat or only available for a small area, and the etching process is complicated and the cost is increased, resulting in low economic feasibility.

Accordingly, there is a need for research on plastic parts capable of imparting excellent decorativeness and luxurious design patterns through a simple process, and improving peeling problems and reliability.

An object of the present invention is to provide a plastic part capable of exhibiting an excellent decorative feeling and a luxurious design pattern.

Another object of the present invention is to provide a plastic part capable of solving the problem of peeling between a printed layer and a plating layer.

Another object of the present invention is to provide plastic parts with excellent reliability.

Another object of the present invention is to provide a plastic part having high strength and excellent wear resistance and durability.

Another object of the present invention is to provide a method for manufacturing a plastic part that is simple in process and can reduce manufacturing cost.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

A method of manufacturing a plastic part according to the present invention includes the steps of (a) preparing a base material; (b) forming a printing layer on the base material; (c) forming a plating layer in a semi-dried state of the printed layer; and (d) forming a protective layer on the plating layer; wherein (c) forming the plating layer in a semi-dried state of the printed layer comprises (c1) chemical plating on the semi-dried printed layer. to form a first plating layer; and (c2) forming a second plating layer by electroplating on the first plating layer.

The print layer may be semi-dried at 40 to 90° C. for 20 to 60 minutes, and Equation 1 below may be satisfied.

[Equation 1]

80 ≤ drying temperature (℃) Χ drying time (minutes) ≤ 420

A plastic part according to the present invention includes a base material; a printed layer disposed on the base material; a plating layer disposed on the printed layer; and a protective layer disposed on the plating layer, wherein the plating layer includes a first plating layer and a second plating layer disposed on the first plating layer.

The plastic part according to the present invention can exhibit an excellent decorative feeling and a luxurious design pattern according to the printing pattern and plating process.

In addition, the plastic part of the present invention can solve the problem of peeling between the printed layer and the plating layer, and has an effect of excellent reliability.

In addition, the plastic part of the present invention has high strength and excellent wear resistance and durability by forming a plating layer using chemical plating and electroplating.

In addition, the manufacturing method of the plastic part of the present invention has a simple process and can reduce manufacturing cost.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a flow chart showing a method for manufacturing a plastic part according to the present invention.
2 is a cross-sectional view of a state in which a printing layer is formed on a base material according to the present invention.
FIG. 3 is a cross-sectional view of a plastic part in which a plating layer and a protective layer are formed on the printed layer shown in FIG. 2 .
4 is a plan view of a state in which a plating layer is formed in a state in which a printing layer is semi-dried and completely dried.
5 is a schematic diagram showing a plating step of a plastic part.
6 is a cross-sectional view of a plastic part in which a primer layer is further disposed between a base material and a printing layer.
7 is a simulation result of temperature and time, which are semi-drying conditions of a printed layer, for an adhesion test.
8 shows adhesion simulation results when the temperature is 90° C. and the time is 20 minutes.
9 shows adhesion simulation results when the temperature is 70° C. and the time is 20 minutes.
10 shows adhesion simulation results when the temperature is 40° C. and the time is 20 minutes.
11 shows adhesion simulation results at a temperature of 40° C. and a time of 60 minutes.
12 shows adhesion simulation results at a temperature of 70° C. and a time of 60 minutes.
13 is an exterior photograph according to Examples 1 and 2.
14 is a photograph of a state in which surface peeling occurred according to Comparative Example 1.

The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Hereinafter, plastic parts and manufacturing methods thereof according to some embodiments of the present invention will be described.

The plastic parts of the present invention can exhibit excellent decorativeness and luxurious design patterns according to the printing pattern and plating process, can solve the problem of peeling between the printed layer and the plating layer, and has excellent reliability.

In addition, in the present invention, by forming a plating layer using chemical plating and electroplating, it has high strength, excellent wear resistance and durability.

In order to achieve all of these effects, it is not solved by changing only the arrangement order of the printed layer and the plating layer, but the semi-drying condition of the printed layer must be satisfied in the manufacturing method.

A detailed description of the manufacturing method of the plastic parts of the present invention is as follows.

1 is a flow chart showing a method for manufacturing a plastic part according to the present invention.

Referring to FIG. 1, the method of manufacturing a plastic part of the present invention includes preparing a base material (S110), forming a printed layer (S120), and chemical plating and electroplating in a state in which the printed layer is semi-dried to coat the plated layer. It includes forming a step (S130) and forming a protective layer (S140).

Plastic parts are made using thermoplastic resin or thermosetting resin, which is a polymer compound made by combining raw materials extracted from petroleum, and can be applied to all fields where plastic can be used, such as home appliances, furniture, and automobile interior materials.

In particular, the plastic parts of the present invention are used as interior materials for finishing or decorating the surface of various interior products, console boxes, dashboards, door trims, and exterior garnishes of automobiles. It can be applied to exterior materials.

In the step of preparing the base material, the base material 10 is a plastic material and refers to an injection-molded material.

The base material is polycarbonate (PC), polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), ABS resin (acrylonitrile butadiene styrene resin), polyvinyl chloride (PVC), polybutylene terephthalate (PBT), polyethylene (PE), polyamide (PA) and PC/ABS blend One or more of resins (polycarbonate/acrylonitrile butadiene styrene) may be included.

Injection molding is a technology commonly used in industrial settings that melts a resin material, pours it into a mold, and hardens it to produce an injection molded product.

Between the step of preparing the base material 10 and the step of forming the printed layer 20 on the base material 10 to be described later, a pretreatment step of removing foreign substances from the surface of the base material 10 may be further included. there is.

A pretreatment step may be performed using thinner or/and IPA solvent as a degreasing process prior to painting. By further including a pretreatment step, it is possible to remove foreign substances and make a surface without oil so that the printed layer or the plating layer adheres well to the surface of the base material.

2 is a cross-sectional view of a state in which a printing layer is formed on a base material according to the present invention.

As shown in FIG. 2 , a printed layer 20 is formed on the base material 10 .

The reason why the printed layer 20 is directly formed on the base material 10 is that an image pattern can be given to a plastic part without performing etching or laser irradiation in terms of the process, and the problem of separation from the plating layer to be described later can be solved. because there is

In the step of forming the print layer, it is preferable to perform pad printing or silk screen.

Pad printing is a method of printing directly on a product using an elastic pad having elasticity such as rubber or silicon. In pad printing, when you want to print an image pattern or color on a specific location of a printed object, ink is smeared on a corrosion plate imprinted with the image pattern or a color plate on which the color is accumulated, and the ink accumulated on the image pattern or color plate imprinted on the corrosion plate. is transferred to an elastic pad, and then the elastic pad is pressed to the object (injection molded product) to transfer the image pattern or color.

In the silk screen, liquid ink is applied on a screen having a pattern, and appropriate pressure is applied while applying with a squeegee or the like so that the ink passes through only the unblocked portion of the screen and is applied.

When the printing layer is formed by performing pad printing or silk screen, it is possible to precisely print on the flat, curved, concave surface or wide area of the base material, and the desired image pattern and color can be printed at the desired location. there is.

On the other hand, when the printing layer is performed by hydraulic transfer, the desired image pattern is printed at the desired location because the water and the transfer film are used to settle the object to be printed from the upper part of the transfer film and the pattern is printed on the surface of the object by the water pressure. There are downsides to doing it. In addition, when metal is deposited on the hydraulic transfer layer, there is a disadvantage in that the pattern of hydraulic transfer does not appear due to the metal deposition.

Accordingly, it is preferable to use pad printing or silk screen in order to precisely print on the base material, print desired image patterns and colors at desired locations, and improve the texture of the design surface.

The ink used in the printing layer 20 includes acrylic resin, epoxy resin, and colored pigment as main components, and may further include one or more additives selected from among light stabilizers, antioxidants, quenchers, and catalysts. no.

FIG. 3 is a cross-sectional view of a plastic part in which a plating layer and a protective layer are formed on the printed layer shown in FIG. 2 .

As shown in FIG. 3 , after forming the plating layer 30 by depositing a metal on the printed layer 20 , the protective layer 40 is formed.

In order to solve the surface peeling between the printed layer 20 and the plating layer 30, it is important to form the plating layer 30 in a state where the printed layer 20 is semi-dried.

When the plating layer 30 is formed in a state in which the printed layer 20 is completely dried, the bonding force between the printed layer and the plating layer is weakened, resulting in peeling.

Here, complete drying means that the solvent is completely removed by performing at 80 to 90 ° C. for 30 to 120 minutes under general drying conditions.

Semi-drying referred to in the present invention means removing about 40 to 80% of the solvent by performing the drying at a lower temperature and for a shorter time than general drying conditions.

Also, the semi-dry state means a state in which ink does not stick to the hand.

4 is a plan view of a state in which a plating layer is formed in a state in which a printing layer is semi-dried and completely dried.

As shown in FIG. 4 , in a state in which the printed layer is semi-dried, the metal is well adhered to the pattern line of the printed layer as well. On the other hand, in a state in which the printed layer is completely dried, the metal is not well adhered to the pattern line of the printed layer.

That is, compared to when the printed layer is completely dried, when the printed layer is semi-dried, it provides an excellent adhesive effect without surface peeling between the printed layer and the plating layer, and thus has an advantage suitable for application to automobile parts.

Also, when the printed layer 20 is semi-dried, the adhesive strength between the patterned surface of the printed layer 20 and the plating layer 30 may be greater than the adhesive strength between the non-patterned surface and the plating layer.

Here, non-patterned surfaces refer to unprinted surfaces.

In the present invention, in order to solve the surface peeling, the print layer 20 is semi-dried at 40 to 90 ° C. for 20 to 60 minutes, and it is preferable to satisfy the following formula 1.

[Equation 1]

80 ≤ drying temperature (℃) Χ drying time (minutes) ≤ 420

The technical significance of these parameters is described as follows.

In general, in the field of plastic parts, after forming a printed layer on a plated layer, etching or laser irradiation is performed to show patterns and patterns. there was.

As peeling occurs, the reliability of plastic parts deteriorates, and there is also difficulty in displaying luxurious design patterns.

In order to solve this problem, the present inventors have selected the order of forming the plating layer on the printed layer. In addition, it was confirmed that the pattern and pattern effect were equal to or higher than the existing physical properties without irradiation of etching or laser.

In order to evaluate the peeling problem, in the process of forming the plating layer on the printed layer, the existing complete drying condition was applied as it is.

In general, it is known that the higher the drying temperature and the longer the drying time in the printing process, the more complete drying is achieved and the higher the adhesion, so that peeling can be reduced.

After the printing layer was completely dried, a plating layer was formed, but it was confirmed that surface peeling occurred as the ink was completely dried and the adhesive force with the plating layer was weakened.

In order to solve the problem of peeling, the present inventors adjusted the temperature and time of the drying condition so that the surface peeling between the printed layer and the plating layer was not made.

As a result of these studies, the present inventors can show a luxurious design pattern with a simple process by the order of arrangement of the printed layer and the plating layer, and can secure excellent adhesion of the plating layer by the semi-dry condition of the printed layer. It was confirmed that all of these problems were rectified.

Therefore, in the present invention, in order to present an excellent decorative feeling and luxurious design pattern, solve the problem of peeling between the printed layer and the plating layer, and develop a plastic part having excellent reliability, the printed layer is heated at 40 to 90 ° C for 20 to 60 minutes. While semi-drying to form a plating layer, it is preferable that the semi-dry condition satisfies Equation 1 below.

[Equation 1]

80 ≤ drying temperature (℃) Χ drying time (minutes) ≤ 420

After half-drying the print layer 20, a pretreatment step of removing foreign substances on the surface may be further included. As the solvent used for the pretreatment, IPA may be mainly used, as described above.

5 is a schematic diagram showing a plating step of a plastic part.

The step of forming a plating layer in a semi-dried state of the printed layer includes forming a first plating layer for imparting conductivity by chemical plating on the semi-dried printed layer, and forming a second plating layer by electroplating on the first plating layer. It includes steps to

Specifically, the step of chemical plating to form the first plating layer is a step of etching and then reducing the surface of the semi-dried printed layer, an activation step of adsorbing palladium (Pd) and tin (Sn) on the reduced surface, A second activation step of removing the tin (Sn) and activating the palladium (Pd), and forming a first plating layer by forming a nickel layer on the activated surface.

In this chemical plating treatment, the oxidizing agent solution selectively elutes rubber components such as butadiene from the injected product according to etching conditions to impart adhesion to the plating and form fine irregularities on the surface. Upon reduction, hexavalent chromium is reduced to trivalent chromium.

In the first stage of activation, the etched surface reacts with the catalytic metal to allow electroless plating to occur. In the activation step 2, only electroless plating is facilitated by dissolving tin components and activating palladium. The nickel layer provides conductivity by depositing metallic nickel on the catalyst layer to perform electroplating.

Forming a second plating layer by electroplating is a step of forming a copper plating layer on the first plating layer that serves as a buffer between the base material and metal, and a semi-gloss nickel layer on the copper plating layer to improve corrosion resistance and prevent corrosion. forming a polished nickel layer for imparting luster and corrosion resistance on the semi-bright nickel layer, forming an MP (microporous) nickel layer for dispersing corrosion current on the polished nickel layer, and and forming a second plating layer by forming a chromium plating layer having corrosion resistance and wear resistance on the MP nickel layer.

This electroplating treatment imparts luster and cushioning against external impact through copper plating, and prevents corrosion of the chromium layer by forming fine particles through the MP nickel layer. Finally, the colorful appearance and wear resistance of the plating are imparted through the chrome plating layer.

By forming the plating layer 30 through such chemical plating and electroplating, productivity and uniformity of the metal thin film are excellent.

In addition, it has high strength and has excellent wear resistance and durability.

The plating layer 30 may be disposed on the entire surface of the printed layer 20 to cover the printed pattern.

The plating layer 30 may be formed to a thickness of about 1 to 100 μm, preferably about 5 to 50 μm, but is not limited thereto.

The protective layer 40 serves to protect the surface of the plating layer 30 and adjust gloss.

In addition, the protective layer 40 improves the appearance of the plastic part to increase marketability, and protects the plating layer from being damaged by imparting light resistance, chemical resistance, and scratch resistance.

In addition, the protective layer 40 is colorless and transparent, allowing light to pass through, and imparting a glossy gloss effect and a UV blocking effect.

The protective layer 40 is also called a clear coating layer, and may be formed by applying a glossy, semi-glossy, or matte clear composition.

The protective layer 40 may include at least one of a vinyl resin, an epoxy resin, a polyurethane resin, an acrylic resin, an isocyanate resin, and a polyol resin, and may further include a dispersant, a photoinitiator, a UV stabilizer, and the like.

The protective layer 40 may be formed to a thickness of 10 to 50 μm, preferably 20 to 40 μm, but is not limited thereto.

6 is a cross-sectional view of a plastic part in which a primer layer is further disposed between a base material and a printing layer.

As shown in FIG. 6, between the pretreatment step of removing foreign substances from the surface of the base material 10 and the step of forming the printed layer 20 on the base material 10, the primer is placed on the pretreated base material surface. A further step of forming layer 15 may be included.

The primer layer 15 may further improve adhesion between the base material 10 and the printed layer 20 . The primer layer 15 may be formed by applying a vinyl resin, an epoxy resin, a polyurethane resin, an acrylic resin, or the like.

The plastic part of the present invention includes a base material 10, a printed layer 20 disposed on the base material 10, a plating layer 30 disposed on the printed layer 20, and a protection disposed on the plating layer 30. A layer 40 is included, and the plating layer 30 includes a first plating layer and a second plating layer disposed on the first plating layer.

A plating layer 30 may be disposed on the entire surface (patterned and non-patterned portions) to cover the pattern of the printed layer 20 .

Adhesion between the patterned surface of the printed layer 20 and the plating layer 30 may be greater than that between the non-patterned surface and the plating layer 30 . This means that since the metal deposition is performed while the printed layer 20 is semi-dried, the adhesive force on the surface of the printed pattern is relatively high.

The first plating layer may include a nickel layer.

The second plating layer includes a copper plating layer, a semi-bright nickel layer disposed on the copper plating layer, a bright nickel layer disposed on the semi-bright nickel layer, an MP nickel layer disposed on the bright nickel layer, and an MP nickel layer disposed on the MP nickel layer. It may include a chrome plating layer disposed on.

As described above, a primer layer 15 may be further disposed between the base material 10 and the printed layer 20 .

As the plating layer is disposed on the printed layer, the plastic part of the present invention has a plant pattern such as a circular or polygonal pattern, a cylinder or polygonal column pattern, a grid pattern, a stripe pattern, a dot pattern, a mosaic pattern, a dobby pattern, or a flower pattern. It can represent three-dimensional patterns such as patterns, various animal patterns, character patterns, and three-dimensional patterns, and can represent excellent decorative and luxurious design patterns. In addition, the plastic part may exhibit excellent reliability without surface peeling, and may exhibit high strength and excellent wear resistance and durability.

As described above, a specific embodiment of the plastic part and its manufacturing method is as follows.

1. Adhesion evaluation

The tape peel test was evaluated according to ISO 2409 or JIS K 5600-5-6. After firmly attaching the prescribed tape JIS Z 1522, pull the tape in a 90° direction to remove it.

The criterion for judgment is as follows. When between M1.0 and M2.5, peeling did not occur and the adhesiveness was evaluated to be excellent.

[Table 1]

7 is a simulation result of temperature and time, which are semi-drying conditions of a printed layer, for an adhesion test. After forming the ink layer by pad printing on the injection-molded plastic material, the drying temperature and drying time were adjusted.

It can be seen from FIG. 7 how temperature and time affect peeling evaluation.

In the main effect graph, the Y result value shows more than 2.5 at the temperature of 40 ~ 90 ℃, and it shows a tendency to increase as the temperature increases. From 20 to 120 minutes, as the time increases, the Y result value tends to increase with a constant slope.

The interaction graph shows the result of applying temperature and time together.

When the temperature was 40 ℃, 70 ℃, 90 ℃, the Y result value was different depending on the time.

When the temperature was 40 ° C to 70 ° C and the drying time was 20 to 60 minutes, the Y value showed M2.5 or less. It can be expected that surface peeling will not occur.

Even when the drying time was 20 minutes at a temperature of 70 ° C to 90 ° C, the Y value showed M2.5 or less.

Conversely, when the drying time is 120 minutes at 40 ° C to 90 ° C, and when the drying time is 60 minutes at more than 70 ° C to less than 90 ° C, peeling problems can be expected to occur because the Y value exceeds M2.5 .

Based on these results, adhesion simulations were performed according to the drying temperature and drying time of the printed layer. 7 to 12 are the results of applying both the drying temperature and the drying time. 8 is when the temperature is 90 ° C and the time is 20 minutes, FIG. 9 is when the temperature is 70 ° C and the time is 20 minutes, FIG. 10 is when the temperature is 40 ° C and the time is 20 minutes, FIG. is the adhesion simulation result when the temperature is 70 ° C and the time is 60 minutes.

The simulation predicted value y was derived for the target value of the Y axis, and the red solid line is displayed at the corresponding temperature and time.

8 to 12, M1.0 to M2 when semi-drying conditions of 90°C Χ 20 minutes, 70°C Χ 20 minutes, 40°C Χ 20 minutes, 40°C Χ 60 minutes, and 70°C Χ 60 minutes are satisfied. represents .5.

Example 1

An injection-molded plastic base material was prepared, and the surface of the material was degreased with IPA and foreign substances were removed.

A printed layer was formed using an ink containing an acrylic resin, an epoxy resin, and a carbon black pigment, and pad printing, and a plating layer was formed in a semi-dried state at 40° C. for 60 minutes.

The plating layer is etching (sulfuric acid H ₂ SO ₄ 10ml/L, chromium solution CrO ₃ 20ml/L), reduction (20 seconds), activation I (Pd, Sn adsorption), activation II (Sn removal), nickel plating (nickel salt Ni ²⁺ 5 g/L), chemical plating was performed.

Subsequently, copper sulfate plating (copper sulfate CuSO ₄ 10ml/L, Cl ^- 5ml/L), semi-bright nickel plating (nickel sulfate NiSO ₄ 15ml/L, nickel chloride NiCl ₂ 5ml/L, boric acid H ₃ BO ₃ 5ml/L), gloss Nickel plating (nickel sulfate NiSO ₄ 10ml/L, nickel chloride NiCl ₂ 3ml/L, boric acid H ₃ BO ₃ 5ml/L,), MP nickel plating (nickel sulfate NiSO ₄ 15ml/L, nickel chloride NiCl ₂ 5ml/L, Electroplating was performed in the order of boric acid H ₃ BO ₃ 5ml/L) and chrome plating (chrome solution CrO ₃ 50ml/L).

Subsequently, a plastic part was manufactured by applying a composition containing a vinyl resin as a main component on the plating layer and then irradiating 500 mJ/cm ² of ultraviolet rays to form a protective layer.

Example 2

A plastic part was manufactured under the same conditions as in Example 1, except that the printing layer was formed using a silk screen.

Comparative Example 1

A plastic part was manufactured under the same conditions as in Example 1, except that the print layer was completely dried at 90° C. for 60 minutes.

Comparative Example 2

An injection-molded plastic base material was prepared, and the surface of the material was degreased with IPA and foreign substances were removed.

After forming a plating layer under the chemical plating and electroplating conditions of Example 1, a laser was irradiated to form a pattern.

Subsequently, a printed layer was formed on the patterned plating layer using pad printing, and completely dried at 90° C. for 60 minutes.

Subsequently, a plastic part was manufactured by applying a composition containing a vinyl resin as a main component to form a protective layer.

Comparative Example 3

An injection-molded base material made of plastic was prepared, and the surface of the material was degreased with IPA and foreign substances were removed.

A pattern was printed on the surface of the material by hydraulic transfer using a transfer film having a predetermined pattern in a water bath, and completely dried at 90 ° C. for 60 minutes.

Subsequently, a plating layer was formed under the chemical plating and electroplating conditions of Example 1.

Subsequently, a plastic part was manufactured by applying a composition containing a vinyl resin as a main component to form a protective layer.

Table 2 below shows the results of confirming the occurrence of peeling and the decorative feeling and design pattern of Examples 1 and 2 and Comparative Examples 1, 2 and 3.

The occurrence of peeling was marked with "O" if peeling occurred between the printed layer and the metal layer when observed with the naked eye based on the criterion of Table 1, and "X" if peeling did not occur. As for decorativeness and design patterns, when observed with the naked eye, the pattern was marked as “excellent” if the three-dimensional effect and color were harmonized well, and “insufficient” if the pattern formation was crushed, looked flat, and the color was not harmonious.

[Table 2]

Referring to Table 2 and FIG. 13 , it can be confirmed that by satisfying the manufacturing method of the plastic part of the present invention, there is no peeling, and a decorative feeling and a luxurious design pattern can be displayed.

On the other hand, in Comparative Example 1, peeling occurred because the printed layer was completely dried, and in Comparative Example 2, peeling occurred because the printed layer was formed on the plating layer.

14 is a photograph of a state in which surface peeling occurred according to Comparative Example 1.

Referring to FIG. 14 , by forming a plating layer after completely drying the printing layer, air bubbles are generated on the surface and surface peeling is shown.

In Comparative Example 3, peeling did not occur when observed with the naked eye, but decorativeness and design patterns were insufficient due to hydraulic transfer.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operational effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: base material
15: primer layer
20: printing layer
30: plating layer
40: protective layer

Claims (12)

(a) preparing a base material;
(b) forming a printing layer on the base material;
(c) forming a plating layer in a semi-dried state of the printed layer; and
(d) forming a protective layer on the plating layer;
The (c) step of forming a plating layer in a state in which the printing layer is semi-dried
(c1) forming a first plating layer by chemical plating on the semi-dried printed layer; and
(c2) forming a second plating layer by electroplating on the first plating layer;
According to claim 1,
The step (c1) forming a first plating layer by chemical plating on the semi-dried printed layer
etching and then reducing the surface of the semi-dried printed layer;
adsorbing palladium (Pd) and tin (Sn) on the reduced surface;
removing the tin (Sn) and activating palladium (Pd); and
and forming a first plating layer by forming a nickel layer on the activated surface.
According to claim 1,
The (c2) step of electroplating on the first plating layer to form a second plating layer
forming a copper plating layer on the first plating layer;
forming a semi-bright nickel layer on the copper plating layer;
forming a bright nickel layer on the semi-bright nickel layer;
forming an MP (microporous) nickel layer on the bright nickel layer; and
and forming a second plating layer by forming a chrome plating layer on the MP nickel layer.
According to claim 1,
In the step of forming the printing layer, pad printing or silk screen is performed.
According to claim 1,
Method for producing a plastic part that satisfies the following formula 1 while semi-drying the print layer at 40 to 90 ° C. for 20 to 60 minutes.
[Equation 1]
80 ≤ drying temperature (℃) Χ drying time (minutes) ≤ 420
According to claim 1,
Between the (a) preparing a base material and (b) forming a printed layer on the base material,
The method of manufacturing a plastic part further comprising: (a1) a pretreatment step of removing foreign substances on the surface of the base material.
According to claim 6,
Between the (a1) pretreatment step of removing foreign substances on the surface of the base material and (b) the step of forming a printed layer on the base material,
The method of manufacturing a plastic part further comprising: (a2) forming a primer layer on the surface of the pretreated base material.
base material;
a printed layer disposed on the base material;
a plating layer disposed on the printed layer; and
Including; a protective layer disposed on the plating layer,
The plating layer includes a first plating layer and a second plating layer disposed on the first plating layer.
According to claim 8,
The first plating layer includes a nickel layer,
The second plating layer includes a copper plating layer, a semi-bright nickel layer disposed on the copper plating layer, a bright nickel layer disposed on the semi-bright nickel layer, an MP nickel layer disposed on the bright nickel layer, and an MP nickel layer disposed on the MP nickel layer. Plastic parts including a chrome plating layer disposed on.
According to claim 8,
Adhesion between the patterned surface of the printed layer and the plating layer is greater than adhesion between the non-patterned surface and the plating layer.
According to claim 8,
A plastic part further comprising a primer layer disposed between the base material and the printed layer.
According to claim 8,
The base material is polycarbonate (PC), polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), ABS resin (acrylonitrile butadiene styrene resin), polyvinyl chloride (PVC), polybutylene terephthalate (PBT), polyethylene (PE), polyamide (PA) and PC/ABS blend Plastic parts containing one or more of the resins (polycarbonate/acrylonitrile butadiene styrene).

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