阅读说明：本技术 一种双层纹理背壳的制备工艺 (Preparation process of double-layer texture back shell ) 是由 胡珊珊 于 2021-02-02 设计创作，主要内容包括：本发明提供了一种双层纹理背壳的制备工艺,包括如下步骤：一：制备炫光纹理层,二：制备渐变纹理层；三：将炫光纹理层和渐变纹理层利用透光胶粘结,并在炫光纹理层的上部粘结透光板材。本发明采用了渐变效果和底层效果双层复合的背壳的纹理显示,在渐变的效果基础上增加了纹理显示,使得渐变效果与炫光纹理形成复合显示,增加了显示的多样性。(The invention provides a preparation process of a double-layer texture back shell, which comprises the following steps: firstly, the method comprises the following steps: preparing a glare texture layer, II: preparing a gradient texture layer; thirdly, the method comprises the following steps: and bonding the dazzling texture layer and the gradual change texture layer by using a light-transmitting adhesive, and bonding a light-transmitting plate on the upper part of the dazzling texture layer. The back shell adopts the texture display of the back shell with the double-layer composite of the gradual change effect and the bottom layer effect, and the texture display is added on the basis of the gradual change effect, so that the gradual change effect and the dazzling texture form composite display, and the display diversity is increased.)

1. A preparation process of a double-layer texture back shell is characterized by comprising the following steps:

firstly, the method comprises the following steps: preparing a glare texture layer:

A1) printing dazzling textures on a substrate to prepare a mask plate;

A2) arranging a cauterizing layer on the mask plate with the glare texture surface, and making a light transmitting area and a light non-transmitting area on the cauterizing layer according to the glare texture;

A3) step A2), placing the photoresist mask into a photoetching machine for ultraviolet exposure, irradiating ultraviolet rays on a photoresist plate at the lower part of the mask plate through a light transmitting area, and carrying out non-contact exposure on the position of the mask plate with the light transmitting area of the photoresist to ensure that the photoresist on the photoresist plate corresponding to the light transmitting area generates photochemical reaction;

A4) step A3), completely immersing the mask plate into a developing solution for developing, flushing with plasma water and drying, and dissolving and dropping the photoresist on the rubber plate corresponding to the light transmitting area;

A5) step A4), placing the film into a baking oven for baking and shaping to form a dazzling texture layer;

II, secondly: preparing a gradient texture layer:

B1) transferring the dazzling texture obtained in the step A1) onto a PC (personal computer) board by using glue by using photoresist as a master template so as to copy into a sub-template, and transferring the dazzling texture onto a PET (polyethylene terephthalate) board by using the sub-template;

B2) setting an effect picture needing gradual change by using graphic software, setting the effect picture needing gradual change according to the dazzling texture, adjusting ink, putting the ink into a Heidelberg printing machine, and printing the gradual change effect on a CTP plate to form a gradual change texture layer;

B3) placing the CTP plate on a UV curing machine for curing after the step B2), copying the CTP plate by using the master mold glue to form a daughter plate after curing, performing at least one off-line curing on the copied daughter plate, taking the cured daughter plate as a mold,

B4) placing the PET board obtained in the step B1) in a mould in the step B3), transferring the gradually-changed texture layer of the daughter board to the PET board by using transfer glue, and plating an Ag layer on the other surface of the PET board;

thirdly, the method comprises the following steps: and bonding the dazzling texture layer and the Ag gradient texture layer by using a light-transmitting adhesive, and bonding a light-transmitting plate on the upper part of the dazzling texture layer.

2. The process for preparing a double-textured backshell according to claim 1, wherein in step a2), the light-transmitting and light-blocking regions are defined on the sear layer according to the glare texture using a line width spacing of 0.25 to 0.5 μm.

3. The process for preparing a double-textured back shell according to claim 1, wherein in step A3), the depth of the glare texture is controlled by the thickness of the photoresist plate.

4. The process for preparing the double-textured back shell as claimed in claim 1, wherein in the step A5), the baking temperature is 100-150 ℃ and the baking time is 20-40 min.

5. The process for preparing a double-textured back shell according to claim 1, wherein in the step B3), a 5-50 μm CTP plate is adopted, and the gradient effect is printed at least once on the CTP plate during printing.

6. The process for preparing a double-textured back shell according to claim 1, wherein in the step B3), the CTP plate is placed on a UV curing machine for curing at least 3 times.

7. The process for preparing a double-textured backshell according to claim 1, wherein the gradient texture layer has a gradient texture curve corresponding to a glare texture curve.

8. The process for preparing a double-textured back shell according to claim 1 or 7, wherein the gradient texture curve is composed of a plurality of parallel curves which are sequentially from deep to light and have a line width distance of 0.25 to 0.5 μm in the same direction and in the same color.

9. The process for preparing a double-textured back shell according to claim 1 or 7, wherein the gradient texture curve is composed of a plurality of parallel curves which are sequentially arranged from dark to light in a plurality of colors in the same direction and have a line width distance of 0.25 to 0.5 μm.

Technical Field

The invention relates to the technical field of back shells, in particular to a preparation process of a back shell of electronic equipment, and specifically relates to a preparation process of a back shell with double textures.

Background

Along with the development of electronic products, the appearance is more and more light and thin, and the surface treatment of electronic products is also more and more meticulous, in order not to scrape colored cell-phone surface, often purchase a backshell for electronic products's surface, current backshell generally utilizes transparent or the translucent material flexible material who takes the color to make, and to dazzling the selection of various texture, refer to in the technique disclosed at present and disclose the number: the patent of "CN 111497512A" discloses a preparation method of a single-layer gradient color 3D glare texture decorative sheet, which changes a composite structure of two layers of materials into one layer, so that the production process of the product is reduced, the cost is reduced, the structure is thinner, and the ultrathin design trend of electronic products such as mobile phones is better met; and the diversification of the gradual change effect is realized, the stability of the production color can be ensured, and the production efficiency is high.

However, in effect, the single-layer gradient color 3D dazzling texture decorative sheet has a single gradient effect, and does not have a rich dazzling effect.

Disclosure of Invention

The invention aims to provide a preparation process of a double-layer texture back shell.

In order to achieve the purpose, the invention provides the following technical scheme:

a preparation process of a double-layer texture back shell comprises the following steps:

firstly, the method comprises the following steps: preparing a glare texture layer:

A1) printing dazzling textures on a substrate to prepare a mask plate;

A2) arranging a cauterizing layer on the mask plate with the glare texture surface, and making a light transmitting area and a light non-transmitting area on the cauterizing layer according to the glare texture;

A3) step A2), placing the photoresist mask into a photoetching machine for ultraviolet exposure, irradiating ultraviolet rays on a photoresist plate at the lower part of the mask plate through a light transmitting area, and carrying out non-contact exposure on the position of the mask plate with the light transmitting area of the photoresist to ensure that the photoresist on the photoresist plate corresponding to the light transmitting area generates photochemical reaction;

A4) step A3), completely immersing the mask plate into a developing solution for developing, flushing with plasma water and drying, and dissolving and dropping the photoresist on the rubber plate corresponding to the light transmitting area;

A5) step A4), placing the film into a baking oven for baking and shaping to form a dazzling texture layer;

II, secondly: preparing a gradient texture layer:

B1) transferring the dazzling texture obtained in the step A1) onto a PC (personal computer) board by using glue by using photoresist as a master template so as to copy into a sub-template, and transferring the dazzling texture onto a PET (polyethylene terephthalate) board by using the sub-template;

B2) setting an effect picture needing gradual change by using graphic software, setting the effect picture needing gradual change according to the dazzling texture, adjusting ink, putting the ink into a Heidelberg printing machine, and printing the gradual change effect on a CTP plate to form a gradual change texture layer;

B3) placing the CTP plate on a UV curing machine for curing after the step B2), copying the CTP plate by using the master mold glue to form a daughter plate after curing, performing at least one off-line curing on the copied daughter plate, taking the cured daughter plate as a mold,

B4) placing the PET board obtained in the step B1) in a mould in the step B3), transferring the gradually-changed texture layer of the daughter board to the PET board by using transfer glue, and plating an Ag layer on the other surface of the PET board;

thirdly, the method comprises the following steps: and bonding the dazzling texture layer and the Ag gradient texture layer by using a light-transmitting adhesive, and bonding a light-transmitting plate on the upper part of the dazzling texture layer.

Preferably, in step A2), light-transmitting and non-light-transmitting areas are defined on the branded layer according to the glare texture using a line width spacing of 0.25-0.5 μm.

Preferably, in step a3), the depth of the glare texture is controlled by the thickness of the photoresist plate.

Preferably, in the step A5), the baking temperature is 100-150 ℃, and the baking time is 20-40 min.

Preferably, in step B3), 5-50 μm CTP plate is used, and the gradient effect is printed at least once on the CTP plate when printing.

Preferably, in step B3), the CTP plate is cured at least 3 times by placing it on a UV curing machine.

Preferably, the gradient texture layer has a gradient texture curve corresponding to the glare texture curve.

Preferably, the gradient texture curve is composed of a plurality of parallel curves with the depth to the light and the line width distance of 0.25-0.5 μm in sequence according to the same direction and the same color.

Preferably, the gradient texture curve is formed by sequentially forming a plurality of parallel curves with the depth of the curve to the light of the curve and the line width distance of the curve to be 0.25-0.5 μm in a plurality of colors according to the same direction.

The back shell adopts the texture display of the back shell with the double-layer composite of the gradual change effect and the bottom layer effect, and the texture display is added on the basis of the gradual change effect, so that the gradual change effect and the dazzling texture form composite display, and the display diversity is increased.

Drawings

FIG. 1 is a general process flow diagram of the present invention;

FIG. 2 is a process flow diagram for preparing a glare texture layer in accordance with the present invention;

FIG. 3 is a flow chart of a process for preparing a graded texture layer according to the present invention.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1 to 3, the present invention provides a process for preparing a double-textured back shell, comprising the steps of: firstly, the method comprises the following steps: preparing a glare texture layer:

A1) printing dazzling textures on a substrate to prepare a mask plate;

A2) arranging a cauterizing layer on the mask plate with the glare texture surface, and making a light transmitting area and a light non-transmitting area on the cauterizing layer according to the glare texture;

A3) step A2), placing the photoresist mask into a photoetching machine for ultraviolet exposure, irradiating ultraviolet rays on a photoresist plate at the lower part of the mask plate through a light transmitting area, and carrying out non-contact exposure on the position of the mask plate with the light transmitting area of the photoresist to ensure that the photoresist on the photoresist plate corresponding to the light transmitting area generates photochemical reaction;

A4) step A3), completely immersing the mask plate into a developing solution for developing, flushing with plasma water and drying, and dissolving and dropping the photoresist on the rubber plate corresponding to the light transmitting area;

A5) step A4), placing the film into a baking oven for baking and shaping to form a dazzling texture layer;

II, secondly: preparing a gradient texture layer:

B1) transferring the dazzling texture obtained in the step A1) onto a PC (personal computer) board by using glue by using photoresist as a master template so as to copy into a sub-template, and transferring the dazzling texture onto a PET (polyethylene terephthalate) board by using the sub-template;

B2) setting an effect picture needing gradual change by using graphic software, setting the effect picture needing gradual change according to the dazzling texture, adjusting ink, putting the ink into a Heidelberg printing machine, and printing the gradual change effect on a CTP plate to form a gradual change texture layer;

B3) placing the CTP plate on a UV curing machine for curing after the step B2), copying the CTP plate by using the master mold glue to form a daughter plate after curing, performing at least one off-line curing on the copied daughter plate, taking the cured daughter plate as a mold,

B4) placing the PET board obtained in the step B1) in a mould in the step B3), transferring the gradually-changed texture layer of the daughter board to the PET board by using transfer glue, and plating an Ag layer on the other surface of the PET board;

thirdly, the method comprises the following steps: and bonding the dazzling texture layer and the Ag gradient texture layer by using a light-transmitting adhesive, and bonding a light-transmitting plate on the upper part of the dazzling texture layer.

Preferably, in step A2), light-transmitting and non-light-transmitting areas are defined on the branded layer according to the glare texture using a line width spacing of 0.25-0.5 μm.

Preferably, in step a3), the depth of the glare texture is controlled by the thickness of the photoresist plate.

Preferably, in the step A5), the baking temperature is 100-150 ℃, and the baking time is 20-40 min.

Preferably, in step B3), 5-50 μm CTP plate is used, and the gradient effect is printed at least once on the CTP plate when printing.

Preferably, in step B3), the CTP plate is cured at least 3 times by placing it on a UV curing machine.

Preferably, the gradient texture layer has a gradient texture curve corresponding to the glare texture curve.

Preferably, the gradient texture curve is composed of a plurality of parallel curves with the depth to the light and the line width distance of 0.25-0.5 μm in sequence according to the same direction and the same color.

Preferably, the gradient texture curve is formed by sequentially forming a plurality of parallel curves with the depth of the curve to the light of the curve and the line width distance of the curve to be 0.25-0.5 μm in a plurality of colors according to the same direction.

Example 1

When the concrete preparation is implemented, the following process is selected,

a preparation process of a double-layer texture back shell comprises the following steps:

firstly, the method comprises the following steps: preparing a glare texture layer:

A1) selecting high-transmittance glare textures to draw the glare textures on a substrate, and manufacturing a mask plate, wherein the mask plate is made of soda glass, one surface of the soda glass contains a chromium layer, a light transmitting area and a light non-transmitting area are set on the chromium layer according to the patterns of the glare textures, and the wide line spacing is generally 0.25-0.5 um;

A2) the method comprises the following steps of carrying out ultraviolet exposure by adopting a photoetching machine manufactured by Chinese academy of sciences, arranging a photoresist plate (the thickness of the photoresist plate determines the depth of texture) below a mask plate, irradiating the ultraviolet rays on the photoresist plate through a light transmitting area, carrying out non-contact exposure on a blank mask plate with the photoresist plate (namely carrying out non-contact exposure on the position of the mask plate with the light transmitting area of the photoresist), and irradiating a required graphic area on the mask plate to enable the photoresist in the area to generate photochemical reaction;

A3) completely immersing the mask plate exposed in the step 2) into a developing solution for developing, then washing with deionized water and drying, dissolving and dropping the photoresist in an exposure area after developing and drying, exposing a chromium layer below, dissolving a soluble area on the photoresist by a chemical developer, and keeping the photoresist in a non-exposure area because the photoresist in the non-exposure area does not generate a chemical reaction during exposure and does not have such acid-base neutralization during developing;

A4) baking and shaping are carried out after the step 3), so that the lines are smooth, the whole is soft, the baking temperature is 135 ℃, the baking time is 30min, and the texture content is actually taken as the standard;

II, secondly: preparing a gradient texture layer:

B1) transferring the dazzling texture obtained in the step A1) onto a PC (personal computer) board by using glue by taking photoresist as a master template to form a sub-template, and copying the fine structure of the texture by using the phenomenon of ultraviolet curing, wherein in the same way, the texture is transferred onto the PET (or required material) board by using the sub-template, three-edge positioning is needed during transfer printing, the distance of a glue inlet needs to be consistent with the distance of a flat-plate typesetting (calculating a flat-plate printing seam), otherwise, the positions are not aligned, and the size after cutting the glue outlet needs to be consistent with the size of a material of a mixing machine on a flat-plate printing machine;

B2) drawing a desired gradient effect on drawing software, washing a machine with a lithographic gradient, installing a CTP plate on the machine, pouring ink, printing the gradient by using a four-color machine for lithography, putting a material with a texture into a feed inlet, and printing on the CTP plate by pressing a start key, wherein if the printing is not deep enough for the first time, the number of the machine operation can be continuously added, and the lithographic machine adopts a high castle printer which only has five (CMYK + special) printers or seven Heidelberg (CMYK +3 special) printers.

B3) Placing the CTP plate on a UV curing machine for curing after the step B2), copying the CTP plate by using the master mold glue to form a daughter plate after curing, and performing at least one off-line curing on the copied daughter plate to take the cured daughter plate as a mold;

B4) putting the PET plate obtained in the step B1) in a mould obtained in the step B3), transferring the Ag gradient texture layer of the daughter plate onto the PET plate by using transfer glue, and plating an Ag layer on the other surface of the PET plate;

thirdly, the method comprises the following steps: and bonding the dazzling texture layer and the Ag gradient texture layer by using a light-transmitting adhesive, and bonding a light-transmitting plate on the upper part of the dazzling texture layer.

The structure of the plate sheet prepared by the gradient texture is as follows: the uppermost layer is a transparent plate, the lower part of the base material is provided with a dazzling texture, and the lower part of the dazzling texture is provided with a gradual change effect layer.

The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.