Special 3C epoxy glass fiber composite board for reverse bow veneer

Abstract

The utility model discloses a 3C epoxy glass fiber composite board special for reverse arch veneer, and belongs to the technical field of 3C epoxy glass fiber composite boards, the 3C epoxy glass fiber composite board comprises a 3C epoxy glass fiber composite board body and a leather material, the 3C epoxy glass fiber composite board body is formed by pressing five prepregs, the prepregs comprise a first layer, a second layer, a third layer, a fourth layer and a fifth layer which are arranged from top to bottom, and the first layer, the second layer, the third layer, the fourth layer and the fifth layer are arranged in a staggered mode. The leather material is positioned at the top of the first layer of the prepreg; the 3C epoxy glass fiber composite board is novel in design and ingenious in device, the 3C epoxy glass fiber composite board body is composed of five prepregs, the thicknesses of the prepregs on the upper layer and the lower layer of the 3C epoxy glass fiber composite board body are asymmetrically designed, the upper layer is the first layer, the lower layer is the fifth layer, the 3C epoxy glass fiber composite board body is made into a curved shape, and the thickness of the prepregs on the upper layer and the thickness of the prepregs on the lower layer are asymmetrically designed. The mobile phone leather is attached to the reverse arch face of the 3C epoxy glass fiber composite board body, after the leather is attached, bonded and formed, the 3C epoxy glass fiber composite board body can be pulled to be flat through reverse pulling force generated by leather shrinkage, and the practicability of the device is greatly improved.

Description

Technical Field

[0001] This application relates to the field of 3C epoxy fiberglass composite board technology, and in particular to a 3C epoxy fiberglass composite board specifically for reverse-curve veneer. Background Technology

[0002] Mobile electronic products such as mobile phones are pursuing thinner and lighter designs. The materials for mobile phone back covers have been changed from composite boards, glass, and metal to epoxy fiberglass materials. Epoxy fiberglass materials have advantages such as being lightweight, high-strength, and thin.

[0003] Currently, there are two technical processes for using epoxy fiberglass material for mobile phone back covers. One is to use epoxy fiberglass prepreg to mold and then print and spray the desired colors and patterns. The other, simpler process is to directly attach leather to epoxy fiberglass composite boards.

[0004] The second type of veneer process requires the adhesive on the leather to be bonded to the fiberglass composite board at 150-170℃ for 30-60 seconds for hot pressing and curing. During the high-temperature process, the leather will expand, and after it cools down after bonding, the leather will shrink, causing the product to bend towards the leather side. This results in poor product flatness and low installation efficiency.

[0005] Therefore, this application proposes a 3C epoxy fiberglass composite board specifically for reverse bow veneer. Utility Model Content

[0006] This application proposes a 3C epoxy fiberglass composite board specifically for reverse-curve skin application to solve the problems mentioned in the background art. The 3C epoxy fiberglass composite board body is composed of five semi-cured sheets, with an asymmetrical thickness design between the upper and lower layers of semi-cured sheets (the upper layer being the first layer and the lower layer the fifth layer). The 3C epoxy fiberglass composite board body is made into a curved shape. The mobile phone skin is applied to the reverse-curve surface of the 3C epoxy fiberglass composite board body. After the skin is bonded and formed, the shrinkage of the skin will pull the 3C epoxy fiberglass composite board body flat, greatly improving the practicality of the device.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A 3C epoxy fiberglass composite board for reverse bow veneer includes a 3C epoxy fiberglass composite board body and a veneer. The 3C epoxy fiberglass composite board body is composed of five prepreg sheets pressed together. The prepreg sheets include a first layer, a second layer, a third layer, a fourth layer, and a fifth layer, arranged from top to bottom. The veneer is located on top of the first layer of the prepreg sheets.

[0009] In a preferred embodiment, the thicknesses of the first and fifth layers are asymmetrically designed, wherein the thickness of the first layer is 0.11 mm and the thickness of the fifth layer is 0.15 mm.

[0010] The sheet is made of a PP sheet with a thickness of 0.11 mm on top and a thickness of 0.15 mm on the bottom. After the sheet is hot-pressed, it is bent towards the side with the 0.15 mm thickness. The bending degree is controlled between 0.5 and 1.5 mm. The leather is bonded to the bent side. The shrinkage of the leather and the tensile force of its asymmetrical structure flatten the bent sheet, thereby improving the practicality of the device.

[0011] In a preferred embodiment, the thickness of the second, third, and fourth layers is 0.13 mm.

[0012] Five semi-cured PP sheets are laminated together using a 0.65mm sheet material. The middle three layers are 0.13mm thick, the first layer is 0.11mm thick, and the fifth layer is 0.15mm thick. After the sheet material is hot-pressed, it bends towards the 0.15mm thicker side, with the curvature controlled between 0.5-1.5mm. A leather veneer is then bonded to the curved surface. The shrinkage of the veneer and the tensile force of its asymmetrical structure flatten the curved sheet material, resulting in a very flat overall product and thus improving the practicality of the device.

[0013] In one preferred embodiment, the 3C epoxy fiberglass composite board body is hot-pressed and bent towards the side with a thickness 0.15 mm thicker, with the bending degree controlled between 0.5 and 1.5 mm.

[0014] After the sheet material is hot-pressed, it is bent towards the side that is 0.15 mm thicker, with the bending degree controlled between 0.5 and 1.5 mm. The leather is then bonded to the reverse curved surface. The shrinkage of the leather and the tensile force of its asymmetrical structure flatten the bent sheet material, resulting in a very good overall product flatness, which improves the practicality of the device.

[0015] In one preferred embodiment, the 3C epoxy fiberglass composite board body is made into an arc shape and integrally pressed into shape;

[0016] By designing the thickness of the upper and lower semi-cured sheets of the 3C epoxy fiberglass composite board body to be asymmetrical, with the upper layer being the first layer and the lower layer being the fifth layer, the 3C epoxy fiberglass composite board body is made into an arc shape, thereby improving the practicality of the device.

[0017] In a preferred embodiment, the leather is applied to the reverse side of the 3C epoxy fiberglass composite board body and bonded to the first layer of the prepreg.

[0018] By attaching a mobile phone leather patch to the reverse arched surface of the 3C epoxy fiberglass composite board, the shrinkage of the leather patch will pull the 3C epoxy fiberglass composite board flat, thereby improving the practicality of the device.

[0019] The beneficial effects of this application are:

[0020] 1. This special 3C epoxy fiberglass composite board for reverse-bow veneer is made by pressing five semi-cured PP sheets together with a 0.65mm sheet. The middle three sheets are 0.13mm thick, the top sheet is 0.11mm thick, and the bottom sheet is 0.15mm thick. After the sheet is hot-pressed, it bends towards the 0.15mm thicker side, and the bending degree is controlled between 0.5-1.5mm, which greatly improves the practicality of the device.

[0021] 2. This type of 3C epoxy fiberglass composite board for reverse-bow skin application consists of five semi-cured sheets. The thickness of the upper and lower semi-cured sheets is asymmetrically designed, with the upper layer being the first layer and the lower layer being the fifth layer. The 3C epoxy fiberglass composite board is made into a bow shape. The mobile phone skin is applied to the reverse-bow surface of the 3C epoxy fiberglass composite board. After the skin is bonded and formed, the shrinkage of the skin will pull the 3C epoxy fiberglass composite board flat, greatly improving the practicality of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main body of the device in this application;

[0023] Figure 2 This is a cross-sectional schematic diagram of the device described in this application;

[0024] Figure 3 This is a front view of the device of this application.

[0025] Numbered in the diagram: 1. 3C epoxy fiberglass composite board body; 11. Prepreg; 111. First layer; 112. Second layer; 113. Third layer; 114. Fourth layer; 115. Fifth layer; 12. Leather. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0027] Reference Figure 1-3 A 3C epoxy fiberglass composite board for reverse bow veneer includes a 3C epoxy fiberglass composite board body 1 and a veneer 12. The 3C epoxy fiberglass composite board body 1 is composed of five prepreg sheets 11 pressed together. The prepreg sheets 11 include a first layer 111, a second layer 112, a third layer 113, a fourth layer 114 and a fifth layer 115, arranged from top to bottom. The veneer 12 is located on top of the first layer 111 of the prepreg sheets 11.

[0028] The first layer 111 and the fifth layer 115 have an asymmetrical thickness design, with the first layer 111 being 0.11 mm thick and the fifth layer 115 being 0.15 mm thick. The upper PP sheet is 0.11 mm thick and the lower sheet is 0.15 mm thick. After the sheet is hot-pressed, it bends towards the 0.15 mm thicker side, with the curvature controlled between 0.5 and 1.5 mm. The skin is bonded to the curved surface. The shrinkage of the skin 12 and the tension of its asymmetrical structure flatten the curved sheet, thereby improving the practicality of the device.

[0029] The second layer 112, the third layer 113, and the fourth layer 114 are all 0.13 mm thick. Five semi-cured PP sheets are pressed together using a 0.65 mm sheet material. The middle three layers are 0.13 mm thick, the first layer 111 is 0.11 mm thick, and the fifth layer 115 is 0.15 mm thick. After the sheet material is hot-pressed, it bends towards the 0.15 mm thicker side, with the bend controlled between 0.5 and 1.5 mm. The skin is bonded to the reverse bend. The shrinkage of the skin material 12 and the tension of its asymmetrical structure flatten the bend of the sheet material, resulting in a very good overall product flatness, which improves the practicality of the device.

[0030] The 3C epoxy fiberglass composite board body 1 is hot-pressed and bent towards the side with a thickness 0.15 mm thicker, with the bending degree controlled between 0.5 and 1.5 mm. After the board is hot-pressed, it bends towards the side with a thickness 0.15 mm thicker, with the bending degree controlled between 0.5 and 1.5 mm. The skin is bonded to the reverse curved surface. The shrinkage of the skin 12 and the tensile force of its own asymmetrical structure flatten the bent board, resulting in a very good overall product flatness, thereby improving the practicality of the device.

[0031] The 3C epoxy fiberglass composite board body 1 is made into an arc shape and integrally pressed. By designing the thickness of the upper and lower semi-cured sheets 11 of the 3C epoxy fiberglass composite board body 1 to be asymmetrical, with the upper one being the first layer 111 and the lower one being the fifth layer 115, the 3C epoxy fiberglass composite board body 1 is made into an arc shape, thereby improving the practicality of the device.

[0032] The leather material 12 is applied to the reverse arched surface of the 3C epoxy fiberglass composite board body 1 and bonded to the first layer 111 of the semi-cured sheet 11. After the leather material 12 is applied to the reverse arched surface of the 3C epoxy fiberglass composite board body 1 and bonded and formed, the shrinkage of the leather material 12 will pull the 3C epoxy fiberglass composite board body 1 flat, thereby improving the practicality of the device.

[0033] Working principle: Five semi-cured PP sheets are pressed together using a 0.65mm sheet material. The three middle sheets are 0.13mm thick, the top sheet is 0.11mm thick, and the bottom sheet is 0.15mm thick. After the sheet material is thermo-pressed, it bends towards the 0.15mm thicker side, with the curvature controlled between 0.5-1.5mm. The skin is bonded to the reverse curved surface. The shrinkage of the skin material 12 and the tensile force of its asymmetrical structure flatten the curved sheet material, resulting in a very good overall product flatness.

[0034] The 3C epoxy fiberglass composite board body 1 is composed of five semi-cured sheets 11. The thickness of the upper and lower semi-cured sheets 11 of the 3C epoxy fiberglass composite board body 1 is asymmetrically designed, with the upper one being the first layer 111 and the lower one being the fifth layer 115. The 3C epoxy fiberglass composite board body 1 is made into an arc shape. The mobile phone leather material 12 is attached to the reverse arc surface of the 3C epoxy fiberglass composite board body 1. After the leather material 12 is attached and bonded, the shrinkage of the leather material 12 will pull the 3C epoxy fiberglass composite board body 1 flat.

[0035] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and the inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A 3C epoxy fiberglass composite board for reverse-curve veneer, comprising a 3C epoxy fiberglass composite board body (1) and a veneer (12), characterized in that, The 3C epoxy fiberglass composite board body (1) is composed of five semi-cured sheets (11) pressed together. The semi-cured sheets (11) include a first layer (111), a second layer (112), a third layer (113), a fourth layer (114) and a fifth layer (115), arranged from top to bottom. The leather material (12) is located on top of the first layer (111) of the semi-cured sheet (11).

2. The 3C epoxy fiberglass composite board for reverse-curve veneer as described in claim 1, characterized in that, The thickness of the first layer (111) and the fifth layer (115) is asymmetrical, with the first layer (111) having a thickness of 0.11 mm and the fifth layer (115) having a thickness of 0.15 mm.

3. The 3C epoxy fiberglass composite board for reverse-curve veneer as described in claim 1, characterized in that, The thickness of the second layer (112), the third layer (113) and the fourth layer (114) is 0.13 mm.

4. The 3C epoxy fiberglass composite board for reverse-curve veneer as described in claim 1, characterized in that, The 3C epoxy fiberglass composite board body (1) is hot-pressed and bent towards the side with a thickness of 0.15 mm, with the curvature controlled between 0.5 and 1.5 mm.

5. The 3C epoxy fiberglass composite board for reverse-curve veneer as described in claim 1, characterized in that, The 3C epoxy fiberglass composite board body (1) is made into an arc shape and integrally pressed.

6. The 3C epoxy fiberglass composite board for reverse-curve veneer as described in claim 1, characterized in that, The leather (12) is attached to the reverse arch surface of the 3C epoxy fiberglass composite board body (1) and bonded to the first layer (111) of the prepreg (11).

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