A production process for a double-layer coated single-textured ceramic effect mobile phone back cover sheet

Abstract

The present invention discloses a production process for a double-layer coated single-textured ceramic effect mobile phone back cover sheet, which is realized by the following steps: step one: film preparation process, step two: electroplating a silicon layer, a niobium pentoxide layer, a silicon dioxide layer and a niobium pentoxide layer on one side of a transparent explosion-proof film; step three: UV embossing texture treatment on the niobium pentoxide layer, and rolling up to obtain a UV embossed roll after treatment; step four: electroplating treatment, step five: silk screen treatment, step six: pulling out the silk screen roll of step five for cutting, and cleaning after cutting to obtain a mobile phone back cover sheet with a double-layer coated single-textured ceramic visual effect. The present invention discloses a production process for a double-layer coated single-textured mobile phone back cover sheet, which, through specific secondary electroplating and UV embossing glue, enables the entire sheet to have a double-coated single-textured effect, and cooperates with the first electroplating double-layer structure to enable the entire sheet to also have a ceramic visual effect, with simple operation procedures and low production costs.

Description

Technical Field

[0001] The invention relates to a production process for mobile phone accessories, in particular to a molding process for a mobile phone rear cover sheet. Background Art

[0002] Existing mobile phone back cover sheets are generally made of plastic, and most of them are processed by in-mold injection molding, which makes the texture of the mobile phone back cover sheets more colorful. Then the production process of the mobile phone back cover sheets made by in-mold injection molding is to prepare the base film-embossing texture treatment-electroplating-silk screen printing-cutting-sheet cleaning. For this kind of mobile phone back cover sheet, the UV glue hardness is high during the embossing texture treatment, and UV embossing cannot be performed on the electroplating layer. Therefore, the existing mobile phone back cover sheet has only one texture layer and an electroplating layer on the texture layer, and cannot present a double-plating effect, so that customers are not satisfied with the appearance of the mobile phone back cover sheet. If the double-plating effect is to be achieved, only two films can be prepared and the two electroplated films can be bonded together to achieve the effect of double-layer coating and single texture. In this way, the entire processing procedure is relatively cumbersome and the cost is also high.

[0003] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which led to the emergence of this case. Summary of the invention

[0004] The purpose of the present invention is to provide a production process for a double-layer coated single-textured ceramic effect mobile phone back cover sheet material, so as to solve the problem that the existing production process is relatively complicated and costly.

[0005] In order to achieve the above object, the present invention adopts such technical solution:

[0006] The production process of a double-layer coated single-textured ceramic effect mobile phone back cover sheet of the present invention is achieved by the following steps:

[0007] Step 1: Film preparation process, prepare a roll of transparent explosion-proof film;

[0008] Step 2: Pull out the transparent explosion-proof film roll of step 1, and electroplate a silicon layer, a niobium pentoxide layer, a silicon oxide layer, and a niobium pentoxide layer on one side of the transparent explosion-proof film in sequence, and then roll it up after electroplating to obtain a rolled ceramic film roll;

[0009] Step 3: Transfer the roll of the coated ceramic film in step 2 to the UV embossing production line, pull out the roll of coated ceramic film, perform UV embossing texture treatment on the fourth layer of niobium pentoxide layer on the roll of coated ceramic film, and roll up after treatment to obtain a UV embossed roll; during the UV embossing texture treatment, the UV glue used is composed of a photoinitiator, an acrylic monomer, a polyurethane acrylate resin, a polyester acrylic resin, a phosphate acrylate resin and a silane coupling agent, wherein: the photoinitiator accounts for 1.5-2.5 parts of the total weight, the acrylic monomer accounts for 36-38 parts of the total weight, the polyurethane acrylate resin accounts for 18-21 parts of the total weight, the polyester acrylic resin accounts for 34-36 parts of the total weight, the phosphate acrylate resin accounts for 2.5-4.5 parts of the total weight, and the silane coupling agent accounts for 2.5-4.5 parts of the total weight;

[0010] Step 4: Pull out the UV embossed roll in step 3, perform a second electroplating treatment and reel it up to obtain a secondary electroplated roll;

[0011] Step 5: Pull out the secondary electroplating coil in step 4, perform silk screen processing and reel it up to obtain a silk screen coil;

[0012] Step six: Pull out the silk-screen roll from step five for cutting, and clean it after cutting to obtain a mobile phone back cover sheet with a double-coated single-texture ceramic visual effect.

[0013] The total thickness of the silicon layer and the niobium pentoxide layer is 245-255 nm.

[0014] The polyurethane acrylate resin accounts for 22 parts by weight, the phosphate acrylate resin accounts for 3.5 parts by weight, and the silane coupling agent accounts for 3.5 parts by weight.

[0015] In the above step 2, the pulled transparent explosion-proof film is transported to the electroplating production line, with the transport direction of the transparent explosion-proof film in the electroplating production line being the left and right direction. The above electroplating production line has four target positions arranged side by side on the left and right, and the four target positions are sequentially loaded with silicon, niobium pentoxide, silicon oxide layer and niobium pentoxide from left to right.

[0016] By adopting the above technical scheme, a production process for a double-layer coated single-texture ceramic effect mobile phone back cover sheet of the present invention is provided. By electroplating a silicon layer, a niobium pentoxide layer, a silicon oxide layer, and a niobium pentoxide layer on the base film, one side of the transparent explosion-proof film has high hardness, excellent anti-fingerprint effect, and a high-brightness ceramic effect. Then, the UV embossing glue developed by the inventor is used to adhere to the inorganic material, so that the UV embossing glue can be UV embossed on the roll-plated ceramic film. In this way, in the whole process, both sides of the UV embossed texture layer have an electroplating layer, so that the whole sheet has a double-coated single-texture effect, and the double-layer structure of the first electroplating makes the whole sheet also have a ceramic visual effect. The whole process only needs to add an electroplating operation to the original process. The operation process is simple, and there is no need to use two membranes, which greatly reduces the production cost. DETAILED DESCRIPTION

[0017] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0018] The present invention discloses a production process for a double-layer coated single-textured ceramic effect mobile phone back cover sheet, which is realized by the following steps:

[0019] Step 1: Film preparation process, prepare a roll of transparent explosion-proof film; this transparent explosion-proof film is an existing well-known product.

[0020] Step 2: Pull out the transparent explosion-proof film roll of step 1 and perform four-layer electroplating on one side of the transparent explosion-proof film in sequence, wherein the first layer is a silicon layer, the second layer is a niobium pentoxide layer, the third layer is a silicon oxide layer, and the fourth layer is a niobium pentoxide layer. After electroplating, the film is rolled up to obtain a rolled ceramic film roll with a total thickness of 245-255nm, preferably 253nm. In this step, the pulled transparent explosion-proof film is conveyed to the electroplating production line, with the conveying direction of the transparent explosion-proof film in the electroplating production line being the left and right direction. The electroplating production line has four target positions arranged side by side on the left and right. Silicon, niobium pentoxide, silicon oxide and niobium pentoxide are sequentially installed in the four target positions from left to right. This electroplating method is well known, and the only difference is that only four target positions are used.

[0021] Step 3: Transfer the roll of coated ceramic film in step 2 to a UV embossing production line, pull out the roll of coated ceramic film, perform UV embossing texture treatment on the niobium pentoxide layer of the fourth layer of the roll coated ceramic film, and roll up after treatment to obtain a UV embossed roll; during the UV embossing texture treatment, the UV glue used is composed of a photoinitiator, an acrylic monomer, a polyurethane acrylate resin, a polyester acrylic resin, a phosphate acrylate resin and a silane coupling agent, wherein: the total weight parts of the photoinitiator, the acrylic monomer, the polyurethane acrylate resin, the polyester acrylic resin, the phosphate acrylate resin and the silane coupling agent is 100 parts, and the photoinitiator The weight of the hair dryer accounts for 1.5-2.5 parts of the total weight, preferably 2.5 parts by weight, the weight of the acrylic monomer accounts for 36-38 parts of the total weight, preferably 37 parts by weight, the weight of the polyurethane acrylate resin accounts for 18-21 parts of the total weight, preferably 19.5 parts by weight, the weight of the polyester acrylic resin accounts for 34-36 parts of the total weight, preferably 34 parts by weight, the weight of the phosphate acrylic resin accounts for 2.5-4.5 parts of the total weight, preferably 3.5 parts by weight, and the weight of the silane coupling agent accounts for 2.5-4.5 parts of the total weight, preferably 3.5 parts by weight.

[0022] Step 4: Pull out the UV embossed roll in step 3 for a second electroplating treatment and rewind to obtain a secondary electroplated roll; this electroplating treatment is a conventional electroplating treatment in the existing mobile phone back cover sheet processing process, which will not be repeated here;

[0023] Step 5: Pull out the secondary electroplating coil of step 4, perform silk screen printing and reel it up to obtain a silk screen coil; this silk screen printing process is a conventional silk screen printing process in the existing mobile phone back cover sheet processing process, which will not be repeated here;

[0024] Step six: Pull out the silk screen roll from step five for cutting, and clean it after cutting to obtain a mobile phone back cover sheet with a double-coated single-texture ceramic visual effect. The cutting and cleaning operations are conventional cutting and cleaning processes in the existing mobile phone back cover sheet processing process.

[0025] By adopting the above technical scheme, a production process of a double-layer coated single-textured ceramic effect mobile phone back cover sheet of the present invention is provided. By electroplating four layers on the base film, namely, a silicon layer, a niobium pentoxide layer, a silicon oxide layer and a niobium pentoxide layer in sequence, one side of the transparent explosion-proof film has high hardness, excellent anti-fingerprint effect and a high-brightness ceramic effect. According to tests, the anti-fingerprint effect of the entire sheet is excellent. Then, the UV embossing glue developed by the inventor is used to make the UV embossing glue adhere to the inorganic material, so that the UV embossing glue can be UV embossed on the roll-plated ceramic film. In this way, in the whole process, both sides of the UV embossed texture layer have an electroplating layer, so that the entire sheet has It has a double-coating single-texture effect, and the double-layer structure of the first electroplating makes the entire sheet also have a ceramic visual effect. The entire process only needs to add an electroplating operation to the original process. The operation process is simple and there is no need to use two films, which greatly reduces the production cost. In the entire UV glue formula, in addition to the photoinitiator, acrylic monomer, polyurethane acrylate resin and polyester acrylic resin in the existing UV glue, phosphate acrylate resin and silane coupling agent are added to increase the adhesion of inorganic materials. At the same time, the amount of polyurethane acrylate resin needs to be reduced by about half, and the entire UV glue can be attached to the electroplating and used, thereby achieving the effect of double electroplating.

[0026] The above embodiments do not limit the production methods of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A production process for a double-layer coated single-textured ceramic effect mobile phone back cover sheet, characterized in that: This is accomplished by the following steps: Step 1: Film preparation process, prepare a roll of transparent explosion-proof film; Step 2: Pull out the transparent explosion-proof film roll of step 1, and electroplate a silicon layer, a niobium pentoxide layer, a silicon oxide layer, and a niobium pentoxide layer on one side of the transparent explosion-proof film in sequence, and then roll it up after electroplating to obtain a rolled ceramic film roll; Step 3: Transfer the roll of the coated ceramic film in step 2 to the UV embossing production line, pull out the roll of coated ceramic film, perform UV embossing texture treatment on the fourth layer of niobium pentoxide layer on the roll of coated ceramic film, and roll up after treatment to obtain a UV embossed roll; during the UV embossing texture treatment, the UV glue used is composed of a photoinitiator, an acrylic monomer, a polyurethane acrylate resin, a polyester acrylic resin, a phosphate acrylate resin and a silane coupling agent, wherein: the photoinitiator accounts for 1.5-2.5 parts of the total weight, the acrylic monomer accounts for 36-38 parts of the total weight, the polyurethane acrylate resin accounts for 18-21 parts of the total weight, the polyester acrylic resin accounts for 34-36 parts of the total weight, the phosphate acrylate resin accounts for 2.5-4.5 parts of the total weight, and the silane coupling agent accounts for 2.5-4.5 parts of the total weight; Step 4: Pull out the UV embossed roll in step 3, perform a second electroplating treatment and reel it up to obtain a secondary electroplated roll; Step 5: Pull out the secondary electroplating coil in step 4, perform silk screen processing and reel it up to obtain a silk screen coil; Step six: Pull out the silk-screen roll from step five for cutting, and clean it after cutting to obtain a mobile phone back cover sheet with a double-coated single-texture ceramic visual effect.

2. The production process of a double-layer coated single-textured ceramic effect mobile phone back cover sheet according to claim 1, characterized in that: The total thickness of the silicon layer and the niobium pentoxide layer is 245-255 nm.

3. The production process of a double-layer coated single-textured ceramic effect mobile phone back cover sheet according to claim 1, characterized in that: The polyurethane acrylate resin accounts for 22 parts by weight, the phosphate acrylate resin accounts for 3.5 parts by weight, and the silane coupling agent accounts for 3.5 parts by weight.

4. The production process of a double-layer coated single-textured ceramic effect mobile phone back cover sheet according to claim 1, characterized in that: In the above step 2, the pulled transparent explosion-proof film is transported to the electroplating production line, with the transport direction of the transparent explosion-proof film in the electroplating production line being the left and right direction. The above electroplating production line has four target positions arranged side by side on the left and right, and the four target positions are sequentially loaded with silicon, niobium pentoxide, silicon oxide layer and niobium pentoxide from left to right.