CN209987496U

CN209987496U - Novel mobile phone rear cover

Info

Publication number: CN209987496U
Application number: CN201920647572.7U
Authority: CN
Inventors: 刘文亮; 谢金沛
Original assignee: HENGSHAN COUNTY JIACHENG NEW MATERIAL Co Ltd
Current assignee: HENGSHAN COUNTY JIACHENG NEW MATERIAL Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-01-24
Anticipated expiration: 2029-05-08

Abstract

The utility model provides a novel lid behind cell-phone, relates to photoelectric product technical field, and it includes explosion-proof substrate layer and PC board layer, the aliphatic TPU film that explosion-proof substrate layer formed for curtain coating shaping or coating or for coating acrylic resin film that acrylic resin and through UV solidification formed or be the PC substrate, it forms the adhesive layer by acrylic acid pressure sensitive adhesive or hot melt adhesive to coat on the explosion-proof substrate layer, the one side coating on PC board layer has one deck sclerosis layer, the another side coating on PC board layer has one deck steam separation coating and compound with the adhesive layer. The utility model discloses can avoid in the course of working material to take place warp to very big degree to the bubble point appears in the reduction, improves the product yield.

Description

Novel mobile phone rear cover

Technical Field

The utility model relates to a photoelectric product technical field especially indicates a novel lid behind cell-phone.

Background

Along with the popularization of electronic products, electronic products such as smart phones are embedded into thousands of households and become an indispensable part of daily life, from the 2G era to the 3G era and then to the 4G era, and 5G communication to be popularized is achieved, the rear cover material of the mobile phone is made of plastic, metal, glass ceramic and a PC and PMMA composite material with good communication, and the products are continuously innovated.

In the study of the 3D cover plate of the mobile phone, the PC/PMMA composite plate becomes the hot spot. Due to the coming of the 5G era, the 3D cover plate market of the mobile phone is also confronted with the emphasis on shuffling, the glass and the ceramic are on the market, the metal is confronted with the elimination, and the traditional plastic is confronted with the 'regeneration'. The production process of the rear cover of the existing PC + PMMA mobile phone is basically as follows: PC + PMMA composite board → UV transfer texture → PVD brightening → silk screen printing ink → cutting → hot bending molding → coating hardening layer → UV curing → CNC trimming → molding, the main defects of the process are as follows: 1. the thermal shrinkage rates of the PC material and the PMMA material are different, so that the traditional PC + PMMA plate composite explosion-proof film can generate warping rebound to cause deformation when high-temperature ring measurement is carried out after UV transfer printing and wire drawing, and the traditional explosion-proof film cannot meet the four-curved-surface forming and deep-curved-surface hot bending; 2. the efficiency of sheet transfer printing and PVD coating is too low, and the cost is very high; 3. in the existing processing mode, after a PC material is subjected to hot bending and shaping, a hardened material is sprayed or dip-coated, so that large odor and bubble points are generated, the product yield is low, and the production cost is correspondingly improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that a novel lid behind cell-phone is provided, can avoid in the course of working material to take place warp to very big degree to the bubble point appears in the reduction, improves the product yield.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a novel lid behind cell-phone, includes explosion-proof substrate layer and PC board layer, the aliphatic TPU film that explosion-proof substrate layer formed for curtain coating shaping or coating or for coating acrylic resin film that acrylic resin and through UV solidification formed perhaps be the PC substrate, the coating has the one deck to form the adhesive layer by acrylic acid pressure sensitive adhesive or hot melt adhesive on the explosion-proof substrate layer, the one side coating on PC board layer has one deck sclerosis layer, the another side coating on PC board layer has one deck steam separation coating and compound with the adhesive layer.

Further, the lower surface of explosion-proof substrate layer forms one deck UV rendition layer through UV rendition texture, the lower surface on UV rendition layer forms one deck PVD brightening layer through the sputtering, the lower surface on PVD brightening layer forms one deck UV printing ink silk screen printing layer through UV printing ink silk screen printing.

Or, the lower surface of explosion-proof substrate layer forms one deck UV printing ink silk screen printing layer through UV printing ink silk screen printing, the upper surface of explosion-proof substrate layer forms one deck PVD brightening layer through the sputtering, the upper surface on PVD brightening layer forms one deck UV rendition layer through UV rendition texture, the adhesive layer coating is on UV rendition layer.

Or, the upper surface of explosion-proof substrate layer passes through UV printing ink silk screen printing and forms one deck UV printing ink silk screen printing layer, the upper surface on UV printing ink silk screen printing layer forms one deck PVD brightening layer through the sputtering, the upper surface on PVD brightening layer forms one deck UV rendition layer through UV rendition texture, the adhesive layer coating is on UV rendition layer.

Preferably, the thickness of the explosion-proof base material layer is 30-150 um; the PC board layer is an optical injection molding PC film with the thickness of 0.3-1 mm; the thickness of the adhesive layer is 10-30 um; the hardened layer is a hardened wear-resistant structure with the hardness of 4-6H, which is formed by adopting solvent-free paint or PM solvent to solidify on the surface of the PC board layer, and the thickness of the hardened layer is 8-20 um; what is needed isThe thickness of the water vapor barrier coating is 0.1-1um, and the water vapor transmission rate is less than or equal to 10mL/m²X 24 hours, oxygen barrier rate less than or equal to 1 g/m²X 24H, the dyne value of the surface is more than or equal to 42, and the hardness is 1H.

The beneficial effects of the utility model reside in that: because the explosion-proof substrate layer is an aliphatic TPU film formed by tape casting or coating, or an acrylic resin film formed by coating acrylic resin and UV curing, or a PC substrate, the explosion-proof substrate layer can be ultrathin and soft, has better stretchability and extremely small internal stress during bending, has excellent conformability when used in explosion-proof multi-curved-surface screens, and because the explosion-proof substrate layer and the PC plate layer are all made of isotropic uniform materials and do not have the condition of different shrinkage deformation, the situation that the explosion-proof layer is warped and deformed and is separated from the PC plate layer in the processing process can be avoided to the greatest extent, the joint fraction defective is far lower than that of the existing PET inner explosion-proof film (the product fraction defective can be lower than 3 percent), and in addition, because the surface of the PC plate layer is coated with a hardening layer and then is compounded with the explosion-proof substrate layer, in the subsequent hot bending processing process, relatively large odor and bubble points are not generated basically, the conditions of poor scratch and the like in the processing process can be reduced to a great extent, and compared with the existing production mode of firstly hot bending and then curtain coating of a hardening material, the product with the structure can be produced in the subsequent process production, so that the product yield can be effectively improved.

Drawings

Fig. 1 is a schematic view of the overall structure in embodiment 1 of the present invention;

fig. 2 is a schematic view of the overall structure in embodiment 2 of the present invention;

fig. 3 is a schematic view of the overall structure in embodiment 3 of the present invention.

The reference signs are:

1-explosion-proof substrate layer 2-PC board layer 3-adhesive layer

4-hardening layer 5-water vapour barrier layer 6-UV transfer printing layer

7-PVD brightening layer 8-ink screen printing layer.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

Example 1

As shown in fig. 1, a novel mobile phone rear cover, including explosion-proof substrate layer 1 and PC board layer 2, explosion-proof substrate layer 1 is the aliphatic TPU film that curtain coating shaping or coating formed or for coating acrylic resin and the acrylic resin film that forms through UV curing or for the PC substrate, it forms adhesive layer 3 by acrylic acid pressure sensitive adhesive or hot melt adhesive to coat on the explosion-proof substrate layer 1, the one side coating of PC board layer 2 has one deck sclerosis layer 4, the another side coating of PC board layer 2 has one deck steam separation coating 5 and compound with adhesive layer 3.

The novel mobile phone rear cover provided by the embodiment has the advantages that the anti-explosion substrate layer is an aliphatic TPU film formed by tape casting or coating, or an acrylic resin film formed by coating acrylic resin and UV curing, or a PC substrate, so that the novel mobile phone rear cover can be ultrathin and soft, has better tensile property and extremely small internal stress during bending, has excellent attaching property when used for explosion prevention in a multi-curved panel, is not different in shrinkage deformation because the anti-explosion substrate layer and the PC plate layer are made of uniform materials in all directions, can greatly avoid the situation that the anti-explosion layer is warped and deformed to be separated from the PC plate layer in the processing process, has the attaching reject ratio far lower than that of the existing PET inner anti-explosion film (the product reject ratio can be lower than 3%), and is not only because the surface of the PC plate layer is compounded with the anti-explosion substrate layer after being coated with the hardening layer, so in the subsequent hot bending processing process, the production method can not generate larger smell and bubble point basically, can also reduce the conditions of bad scratch and the like in the processing process to a great extent, and can effectively improve the product yield when the product with the structure is produced in the subsequent process production compared with the prior production mode of hot bending before coating of hardening material.

Further, the lower surface of explosion-proof substrate layer 1 forms one deck UV through UV rendition texture and transfers printing layer 6, and the lower surface that UV transferred printing layer 6 forms one deck PVD brightening layer 7 through the sputtering, and UV printing ink silk screen printing layer 8 is formed through UV printing ink silk screen printing to the lower surface on PVD brightening layer 7.

Preferably, the thickness of the explosion-proof base material layer 1 is 30-150 um; the PC board layer 2 is an optical injection molding PC film with the thickness of 0.3-1 mm; the thickness of the adhesive layer 3 is 10-30um, the peeling force of the adhesive layer 3 is more than or equal to 1800gf/in measured by 180-degree peeling test, and the yellowing resistance performance is good when the hot melt adhesive is selected; the hardened layer 4 is a high-hardness and high-wear-resistance structure with the hardness of 4-6H formed by adopting solvent-free paint or PM solvent to be solidified on the surface of the PC board layer 2, the steel wool friction resistance of the hardened layer can reach more than 3000 times, meanwhile, the hardened layer can be thermally bent, the hardened layer 2 is not corroded, and the thickness of the hardened layer 4 is 8-20 mu m; the thickness of the water vapor barrier coating 5 is 0.1-1um, and the water vapor transmission rate is less than or equal to 10mL/m²X 24 hours, oxygen barrier rate less than or equal to 1 g/m²And the dyne value of the surface of the coating is not less than 42 after 24H, the hardness of the coating is about 1H, the damage of the manufacturing process is convenient to avoid, and the problem of bubble precipitation can be avoided at the later stage by arranging the water vapor barrier coating 5.

Example 2

As shown in fig. 2, the novel mobile phone rear cover provided in this embodiment is different from the novel mobile phone rear cover of embodiment 1 only in the difference of the surface structure of the explosion-proof substrate layer 1, the lower surface of the explosion-proof substrate layer 1 in this embodiment forms a UV ink silk-screen layer 8 by UV ink silk-screen printing, the upper surface of the explosion-proof substrate layer 1 forms a PVD brightening layer 7 by sputtering, the upper surface of the PVD brightening layer 7 forms a UV transfer layer 6 by UV transfer texture, and the adhesive layer 3 is coated on the UV transfer layer 6.

Example 3

As shown in fig. 3, the novel mobile phone rear cover provided in this embodiment is different from the novel mobile phone rear cover of embodiment 1 only in the difference of the surface structure of the explosion-proof substrate layer 1, the upper surface of the explosion-proof substrate layer 1 in this embodiment forms a UV ink silk-screen layer 8 by UV ink silk-screen printing, the upper surface of the UV ink silk-screen layer 8 forms a PVD brightening layer 7 by sputtering, the upper surface of the PVD brightening layer 7 forms a UV transfer layer 6 by UV transfer texture, and the adhesive layer 3 is coated on the UV transfer layer 6.

The above-mentioned each embodiment does the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims

1. The utility model provides a lid behind novel cell-phone, includes explosion-proof substrate layer (1) and PC board layer (2), its characterized in that: the utility model discloses a PC board material layer, including explosion-proof substrate layer (1), acrylic resin film that the aliphatic TPU film that forms for curtain coating shaping or coating or for coating acrylic resin and the acrylic resin film that forms through the UV solidification perhaps be the PC substrate, it forms adhesive layer (3) by acrylic acid pressure sensitive adhesive or hot melt adhesive to coat on explosion-proof substrate layer (1), the one side coating of PC board material layer (2) has one deck sclerosis layer (4), the another side coating of PC board material layer (2) has one deck steam barrier coating (5) and compound with adhesive layer (3).

2. The novel mobile phone rear cover of claim 1, characterized in that: the lower surface of explosion-proof substrate layer (1) forms one deck UV through UV rendition texture and transfers printing layer (6), the lower surface of UV rendition printing layer (6) forms one deck PVD brightening layer (7) through the sputtering, the lower surface of PVD brightening layer (7) passes through UV printing ink silk screen printing and forms one deck UV printing ink silk screen printing layer (8).

3. The novel mobile phone rear cover of claim 1, characterized in that: the lower surface of explosion-proof substrate layer (1) forms one deck UV printing ink silk screen printing layer (8) through UV printing ink silk screen printing, the upper surface of explosion-proof substrate layer (1) forms one deck PVD brightening layer (7) through the sputtering, the upper surface of PVD brightening layer (7) forms one deck UV rendition layer (6) through UV rendition texture, adhesive layer (3) coating is on UV rendition layer (6).

4. The novel mobile phone rear cover of claim 1, characterized in that: the upper surface of explosion-proof substrate layer (1) forms one deck UV printing ink silk screen printing layer (8) through UV printing ink silk screen printing, the upper surface on UV printing ink silk screen printing layer (8) forms one deck PVD brightening layer (7) through the sputtering, the upper surface on PVD brightening layer (7) forms one deck UV rendition layer (6) through UV rendition texture, adhesive layer (3) coating is on UV rendition layer (6).

5. The novel mobile phone rear cover according to claim 2, 3 or 4, characterized in that: the thickness of the explosion-proof base material layer (1) is 30-150 um.

6. The novel mobile phone rear cover of claim 5, characterized in that: the PC board layer (2) is an optical injection molding PC film with the thickness of 0.3-1 mm.

7. The novel mobile phone rear cover of claim 6, characterized in that: the thickness of the adhesive layer (3) is 10-30 um.

8. The novel mobile phone rear cover of claim 7, characterized in that: harden layer (4) be 4-6H's the wear-resisting structure of sclerosis for adopting solvent-free coating or PM solvent one deck hardness that PC board layer (2) surface curing formed, the thickness on harden layer (4) is 8-20 um.

9. The novel mobile phone rear cover of claim 8, characterized in that: the thickness of the water vapor barrier coating (5) is 0.1-1um, and the water vapor transmission rate is less than or equal to 10mL/m²X 24 hours, oxygen barrier rate less than or equal to 1 g/m²X 24H, the dyne value of the surface is more than or equal to 42, and the hardness is 1H.