TWI449631B - Method for forming color gradual changing coating on housing - Google Patents

Description

Method for forming a gradation color pattern on a surface of a casing

The present invention relates to a method of fabricating a gradation color pattern, and more particularly to a method of forming a gradation color pattern on a surface of a casing.

With the improvement of consumption standards, consumers' demand for electronic products not only pays attention to their quality, but also pays more and more attention to the decorative effect of their surface. Electronic products with colorful decorative effects are very competitive in the market.

At present, the decoration of the electronic product casing gradually tends to form a multi-color pattern or a gradation color pattern to attract the eye of the consumer. Conventionally, a method of forming a gradation pattern on a casing has digital printing. However, digital printing requires a special printing machine, which is costly and difficult for a general user to implement.

In view of this, it is necessary to provide a simple and easy way to form a gradation pattern on the surface of the casing.

A method for forming a gradation color pattern on a surface of a casing, comprising the steps of: providing a screen and a film, the screen is formed with an eyelet, the film is coated with an opaque agent, and the granule of the opaque agent is in the film Spreading from dense to thin; applying the screen to the photosensitive agent; attaching the film to the screen, and coating the film on the screen with the agent facing the screen; Providing a light beam, projecting the light beam to the film, partially curing the photosensitive agent on the screen to fill a part of the aperture of the screen, and the unfilled aperture of the screen is gradually distributed from dense to thin; removing the film, clearing A photosensitive agent on a screen; the ink layer is printed on the casing using a screen.

The invention adopts the method of screen printing to form a gradient color pattern on the surface of the casing, and the manufacturing method thereof is simple and easy, and the manufacturing cost is low.

The invention adopts the method of screen printing to form a gradient color pattern on the surface of the casing. The housing can be a housing of an electronic device such as a mobile phone, a computer, a game machine, a camera, or the like, or can be a cover or a container-like product, such as a glasses case, a case, etc., and the specific manufacturing method is as follows: A screen printing screen 10 is provided, and the screen 10 is provided with a plurality of fine holes for ink to pass through. The screen 10 includes a first surface 101 and a second surface 103 opposite the first surface 101.

Referring to FIGS. 2 through 3, a film 12 is provided. The film 12 includes a film base 122 and a medicament 124 disposed on the substrate 122. The base 122 is a transparencies that are comparable to the area of the screen 10. The medicament 124 is formed by applying an opaque photosensitive glue to the substrate 122, and the medicament 124 comprises the medicament particles 1241. The photosensitive glue may comprise a bonding system and a photosensitive system. The main component of the bonding system is epoxy resin, and the main components of the photosensitive system are silver bromide (AgBr) and polyvinyl alcohol (PVA). The medicament 124 can also be coated with an opaque glue Formed on a substrate 122, the opaque glue comprising an epoxy resin. The film substrate 122 is provided with a drug film region 121 and a non-drug film region 123. The drug agent 124 is applied to the drug film region 121, and the drug film region 121 faces the non-drug film region 123. The number gradually decreases, and the distribution of the drug particles 1241 in the film area 121 gradually becomes denser and denser in this direction, forming a gradual effect.

A photosensitive agent is applied to the first surface 101 of the screen 10 such that the aperture of the screen 10 is filled with the photosensitive agent. The photosensitive agent may be an opaque photosensitive glue which may be the same as the photosensitive glue used for the agent 124 coated on the film 12.

The film 12 is attached to the first surface 101 of the screen 10 with one side of the coated medicament 124 facing the first surface 101.

Provide a beam of light. The light beam is projected on the surface of the film 12 opposite to the first surface 101. At this time, the non-film region 123 of the film 12 is allowed to pass the light beam to illuminate the light on the photoresist 10 of the screen 10, and the photosensitive glue The silver bromide in the photosensitive layer is combined with the hydroxyl group of the polyvinyl alcohol to form a water-insoluble polymer compound, and is firmly adhered to the pores of the screen 10. The region of the film region 121 of the film 12 that is not covered by the drug particles 1241 is also allowed to pass through the light beam so that the photosensitive glue filled in the hole corresponding to the screen plate 10 forms a water-insoluble polymer compound. The light beam in the area covered by the drug particles 1241 on the film 12 cannot pass, and the photosensitive glue filled in the hole corresponding to the screen 10 does not form a water-insoluble polymer compound.

Uncovering the film base 122 of the film 12 and rinsing the screen 10 with water, The photosensitive glue on the screen 10 on which the water-insoluble polymer compound is not formed is washed away, so that the perforations of the screen 10 are unobstructed. At this time, the apertures on the screen 10 are gradually filled, and the distribution of the unfilled apertures on the screen 10 is gradually changed from dense to dense. When the screen 10 is used to print a pattern, the pattern exhibits a color. Deep and light gradient effect.

Referring to FIG. 4, the second surface 103 of the screen 10 is attached to the casing 14, and a color ink is placed on the first surface 101 of the screen 10, and the ink is passed through the screen 10 by a certain pressure. The filled aperture forms a first ink layer 141 on the housing 14. The first ink layer 141 includes first ink particles 1411, and the number of the first ink particles 1411 is gradually decreased from one end of the first ink layer 141 toward the other end thereof, and the first ink particles 1411 are correspondingly oriented in this direction. The distribution gradually becomes thinner, so that the color of the first ink layer 141 is gradually changed from deep to light from one end toward the other end to form a gradation effect.

Another screen is produced in the above manner, and the unfilled apertures on the other screen are placed in the area where the apertures are filled with respect to the screen 10. Using the other screen, a second ink layer 143 having a color different from that of the first ink layer 141 is printed on the casing 14, and the second ink layer 143 and the first ink layer 141 are coupled to each other and overlap each other in the joint region. A common area 145 is formed.

Referring to FIG. 4, the number of the first ink particles 1411 of the first ink layer 141 is gradually decreased from the first ink layer 141 toward the common region 145, and the distribution of the first ink particles 1411 is gradually changed in this direction. Thin, so that the color of the first ink layer 141 is changed from deep to light in a direction toward the common area 145; the second ink layer 143 contains the second oil The ink particles 1431, the number of the second ink particles 1431 is gradually decreased from the second ink layer 143 toward the common area 145, and the distribution of the second ink particles 1431 is gradually thinned in this direction, so that the second ink layer 143 is The direction of the color toward the common area 145 is changed from deep to light to form a gradation effect, and a gradation effect of two different colors is formed in the common area 145.

More color gradient ink layers or patterns can also be formed on the housing 14 by the above method.

The interface between the film region 121 of the film 12 and the non-drug film region 123 can also be arranged in various patterns to make the two color gradient regions on the casing 14 more beautiful.

The invention adopts the method of screen printing to form a gradient color pattern on the surface of the casing, and the manufacturing method thereof is simple and easy, and the manufacturing cost is low.

Screen version ‧ ‧10

First surface ‧‧‧101

Second surface ‧‧‧103

Film ‧‧12

Membrane area ‧‧121

Non-membrane area ‧‧‧123

Pharmacy particles ‧‧‧1241

‧‧‧122

Pharmacy ‧‧‧124

Housing ‧‧14

First ink layer ‧‧‧141

Second ink layer ‧‧‧143

First ink particle ‧‧‧1411

Second ink particle ‧‧‧1431

Common area ‧ ‧ 145

1 is a schematic perspective view of a screen of a preferred embodiment of the present invention.

2 is a schematic perspective view of a film of a preferred embodiment of the present invention.

Figure 3 is an enlarged cross-sectional view of the film in Figure 2 along the III-III direction.

4 is a cross-sectional view of a housing in accordance with a preferred embodiment of the present invention.

Housing ‧‧14

First ink layer ‧‧‧141

First ink particle ‧‧‧1411

Second ink layer ‧‧‧143

Second ink particle ‧‧‧1431

Common area ‧ ‧ 145

Claims (11)

A method for forming a gradation color pattern on a surface of a casing, comprising the steps of: providing a screen and a film, the screen is formed with an eyelet, the film is coated with an opaque agent, and the granule of the opaque agent is in the film Spreading from dense to sparsely; applying the screen to the photosensitive agent; attaching the film to the screen, and coating the film with a side of the agent facing the screen; providing a beam of light to project the beam onto the film, The photosensitive agent on the screen is partially cured to fill a part of the perforation of the screen, and the unfilled perforations on the screen are gradually distributed from dense to thin; the film is removed, and the photosensitive agent on the screen is removed; An ink layer is printed on the housing. A method for forming a gradation color pattern on a surface of a casing as described in claim 1, wherein the screen comprises a first surface and a second surface opposite to the first surface, the film comprising a transparent sheet And a drug film region and a non-drug film region disposed on the substrate, wherein the drug film region is coated with a drug. The method for forming a gradation color pattern on a surface of a casing as described in claim 2, wherein the medicinal agent is formed by applying a photosensitive glue on a film area of the film base, the photosensitive glue comprising a bonding system and a Photosensitive system. Forming a gradient on the surface of the casing as described in item 2 of the patent application A method of coloring a pattern, wherein the agent is formed by applying a glue to a film area of a substrate, the glue comprising an epoxy resin. A method for forming a gradation color pattern on a surface of a casing as described in claim 3, wherein a main component of the bonding system is an epoxy resin, and a main component of the photosensitive system is a mixture of silver bromide and polyvinyl alcohol. . A method for forming a gradation color pattern on a surface of a casing as described in claim 1, wherein the sensitizing agent is coated on a first surface of the screen and filled in a hole of the screen, the sensitizing agent is opaque A photosensitive glue comprising silver bromide and polyvinyl alcohol. A method of forming a gradation color pattern on a surface of a casing as described in claim 1, wherein the film is attached to the first surface of the screen, and the film is coated with a surface of the agent facing the first surface. A method for forming a gradation color pattern on a surface of a casing as described in claim 1, wherein the light beam is projected on a surface opposite to the first surface of the screen and the light beam is transmitted through the film. The region having the drug is irradiated onto the photosensitive agent of the screen, and the photosensitive agent is chemically reacted to form a polymer compound insoluble in water to fill the pores of the screen. A method of forming a gradation color pattern on a surface of a casing as described in claim 1 wherein the screen photographic agent is rinsed with water. A method for forming a gradation color pattern on a surface of a casing as described in claim 1, wherein a first oil is printed on the casing using a screen An ink layer and a second ink layer, the first ink layer and the second ink layer are partially overlapped, and the colors of the first ink layer and the second ink layer are different. A method for forming a gradation color pattern on a surface of a casing as described in claim 1 wherein the casing is a casing or a cover of an electronic device and a container-like article.