CN212115384U

CN212115384U - Protective film for curved mobile phone

Info

Publication number: CN212115384U
Application number: CN202021142423.4U
Authority: CN
Inventors: 李辉; 钟维刚; 庄缵生; 白玉霞; 陈业昌
Original assignee: Dongguan Chaozhi New Material Co ltd
Current assignee: Dongguan Chaozhi New Material Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-12-08
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a protection film for curved mobile phone, which comprises a substrate layer, the substrate layer has upper surface and lower surface, the upper surface is equipped with sclerosis layer and acrylic glue system protection film in proper order, the lower surface is equipped with dual cure glue film, silica gel layer and leaves the type layer in proper order, dual cure glue film is the elder generation thermocuring and then photocuring makes, just the thickness on sclerosis layer is less than the thickness on dual cure glue film. The application of the protective film for the curved-surface mobile phone is good in laminating performance with the curved-surface screen of the curved-surface mobile phone, the white edge phenomenon cannot occur, the edge of the cambered surface is not prone to warping and wrinkling, the preparation process is simple, the processing difficulty is low, and the processing cost can be reduced.

Description

Protective film for curved mobile phone

Technical Field

The utility model relates to a protection film technical field, more specifically relate to a protection film for curved surface cell-phone.

Background

Along with the popularization of smart phones, the demand of mobile phone films is increased, the plastic mobile phone films which are produced at first are gradually eliminated by the market due to various defects of performance, and the toughened glass films can completely cover the original screen surface, prevent the original screen surface from being damaged and scratched by external force, further increase the impact absorbability and cannot influence the video effect of the screen, so that the toughened films occupy more and more in the mobile phone film market, but the toughened films are used for 3D curved-surface mobile phone protective films, and on one hand, the glass is difficult to form by hot bending and have high reject ratio; on the other hand, the glass material has an influence on unlocking of the finger print under the screen.

Nowadays, the body edge and the screen of many mobile phones are designed into an arc shape to form a curved mobile phone, and the requirement for a curved mobile phone protective film is more and more strict. At present, a protective film is generally formed by hot bending and forming after an AB adhesive is attached to a PET film while the PET film is hardened, but the protective film has poor adhesion with a screen, the edge of a cambered surface is easy to warp and generate a white edge, and the problem of warping is easy to occur particularly in some environments with high temperature and high humidity. Chinese patent CN209940890 discloses a 3D protective film, which comprises a film coating layer, a UV hardened layer, a heating-UV dual-curing adhesive layer, a PET layer, a silica gel layer and a peeling layer, which are sequentially stacked from top to bottom. However, the processing difficulty is high due to the direct combination of the UV hardening layer and the heating-UV dual-curing adhesive layer, so that the preparation efficiency is low, the production cost is high, and the process is complex.

Therefore, there is a need to provide a protective film for a curved-surface mobile phone to solve the above-mentioned deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a curved surface is protection film for cell-phone, it is good with the curved surface screen laminating nature of curved surface cell-phone, and the cambered surface edge is difficult for appearing warpage and play white limit, and preparation simple process, the processing degree of difficulty is low, reduces the processing cost.

In order to realize the above-mentioned purpose, the utility model discloses a protection film for curved mobile phone, including the substrate layer, the substrate layer has upper surface and lower surface, the upper surface is equipped with sclerosis layer and acrylic glue system protection film in proper order, the lower surface is equipped with dual cure glue film, silica gel layer in proper order and leaves the type layer, dual cure glue film is that the thermosetting surface is dry and follow-up photocuring design is made again, just the thickness on sclerosis layer is less than the thickness on dual cure glue film.

Compared with the prior art, the protective film for the curved-surface mobile phone has the advantages that when the protective film is not needed to be used, the acrylic adhesive protective film is used for protection, and dust is prevented from polluting a hardening layer; when in use, the acrylic adhesive protective film is torn, and the hardened layer provides better wear resistance and anti-fouling performance; due to the introduction of the dual-curing adhesive layer, the edges of the cambered surface can be effectively prevented from warping and forming white edges; be equipped with the substrate layer between sclerosis layer and two solidification glue films, great reduction processing degree of difficulty. After tearing the release layer, with the help of silica gel layer and curved surface screen laminating, the air discharge is good, and the laminating is level and smooth. Therefore, the protective film for the curved-surface mobile phone can be well attached to the curved-surface screen of the curved-surface mobile phone, the edge of the curved surface is not prone to warping and whitening, the preparation process is simple, the processing difficulty is low, and the processing cost is reduced.

Preferably, an OCA optical adhesive layer and a PET optical film layer are sequentially arranged between the double-curing adhesive layer and the silica gel layer from top to bottom.

Preferably, the thickness of the OCA optical adhesive layer is 50-120 μm.

Preferably, the substrate layer is selected from any one of a PET film layer, a TAC film layer and an SRF film layer.

Preferably, the thickness of the substrate layer is 20-100 μm.

Preferably, the thickness of the hardened layer is 3 to 7 μm.

Preferably, the thickness of the dual-curing glue layer is 30-80 μm.

Preferably, the thickness of the silica gel layer is 20-70 μm.

Preferably, the hardened layer is an anti-fingerprint polyurethane acrylic resin hardened layer.

Preferably, the dual-curing glue layer is made of aliphatic polyurethane acrylate.

Drawings

Fig. 1 is the structure schematic diagram of the protective film for the curved surface mobile phone of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the protective film for a curved-surface mobile phone according to the present invention.

Description of the symbols:

the protective film for the curved-surface mobile phone comprises a protective film 100 for the curved-surface mobile phone, a substrate layer 10, a hardening layer 20, an acrylic adhesive protective film 30, a dual-curing adhesive layer 40, a silica gel layer 50, a release layer 60, an OCA (optical clear adhesive) layer 70 and a PET (polyethylene terephthalate) optical film layer 80.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Referring to fig. 1, the protective film 100 for a curved-surface mobile phone of the present application includes a substrate layer 10, the substrate layer 10 has an upper surface and a lower surface, the upper surface is sequentially provided with a hardened layer 20 and an acrylic adhesive protective film 30, the lower surface is sequentially provided with a dual-curing adhesive layer 40, a silica gel layer 50 and a release layer 60, the dual-curing adhesive layer 40 is formed by heat curing, surface drying and then light curing, and the thickness of the hardened layer 20 is smaller than that of the dual-curing adhesive layer 40. It is understood that a heat-curable and light-curable material is coated on the upper surface of the base material layer 10, and a heat curing process and a light curing process are performed to form the hardened layer 20. Preferably, the hardened layer 20 is made using a photo-curing process. An acryl glue-based protective film 30 is provided on an upper surface of the hardened layer 20 to protect the hardened layer 20, and it should be understood that the acryl glue-based protective film 30 is a protective film with acryl glue. The lower surface of the substrate layer 10 is coated with a material which can be firstly thermally cured and then photo-cured, and the dual-curing adhesive layer 40 is obtained by firstly performing a thermal curing process and surface drying and then performing a photo-curing process for shaping. And coating a silica gel material on the other side of the double-curing adhesive layer 40 to form a silica gel layer 50, and then attaching a release layer 60. The thickness of the hardened layer 20 is 3-7 μm, for example, the thickness of the hardened layer 20 can be, but is not limited to, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm. Since the dual cure adhesive layer 40 serves as a main support layer, the thickness of the hardened layer 20 is smaller than that of the dual cure adhesive layer 40. In a preferred embodiment, the hardened layer 20 is a fingerprint-proof polyurethane acrylic resin hardened layer 20, and the polyurethane acrylic resin is photo-cured to form the fingerprint-proof hardened layer 20, i.e. a fingerprint-proof structure is disposed on the surface of the hardened layer 20, and the protection of the acrylic adhesive protective film 30 is matched to prevent the fingerprint-proof effect from being affected. The thickness of the dual cured glue layer 40 is 30-80 μm, such as the thickness of the dual cured glue layer 40 can be, but is not limited to, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm. In a preferred embodiment, the dual-cure adhesive layer 40 is made of aliphatic urethane acrylate through thermal curing and surface drying, and then through photo-curing and shaping. The thickness of the silicone gel layer 50 is 20-70 μm, for example, the thickness of the silicone gel layer 50 may be, but is not limited to, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm.

Referring to fig. 2, an OCA optical adhesive layer 70 and a PET optical film layer 80 are sequentially disposed between the dual curing adhesive layer 40 and the silicone layer 50 from top to bottom. Because the tackiness on silica gel layer 50 is lower, silica gel layer 50 is used for with the laminating of curved surface screen simultaneously, should not too thick, adopts less time probably to lead to silica gel layer 50 and dual cure glue film 40 cohesion relatively poor, leads to droing. OCA optical adhesive layer 70's gluey stickness is stronger than silica gel layer 50, adopts OCA optical adhesive layer 70 and the combination of two solidification glue films 40, and two solidification glue films 40 combine with the help of PET optical film layer 80 and silica gel layer 50, avoids the emergence of above-mentioned condition, and can promote the discharge of air, improves the stability of silica gel layer 50 and curved surface screen laminating. Further, the thickness of the OCA optical adhesive layer 70 is 50-120 μm. For example, the thickness of OCA optical glue layer 70 may be, but is not limited to, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm.

With continued reference to fig. 1, the substrate layer 10 is selected from any one of a PET film layer, a TAC film layer, and an SRF film layer. In one embodiment, the substrate layer 10 is selected from PET film layers, and preferably PET film layers with high transparency. In another embodiment, the substrate layer 10 is selected from a TAC (triacetyl cellulose) film layer or an SRF film layer, which can effectively improve the identification of fingerprints under the screen. In addition, the TAC film layer or the SRF film layer is used as the substrate layer 10, when the PET optical film layer 80 can be matched, the UV forming processing is easy, the rebound is avoided, and the laminating performance with a curved screen is good. Further, the thickness of the substrate layer 10 is 20-100 μm, for example, the thickness of the substrate layer 10 may be, but is not limited to, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm.

Compared with the prior art, the protective film 100 for the curved-surface mobile phone has the advantages that when the protective film is not needed to be used, the acrylic adhesive protective film 30 is used for protection, and dust is prevented from polluting the hardened layer 20; when in use, the acrylic adhesive protective film 30 is torn, and the hardening layer 20 provides better wear resistance and anti-fouling performance; due to the introduction of the double-curing glue layer 40, the edges of the cambered surface can be effectively prevented from warping and forming white edges; be equipped with substrate layer 10 between sclerosis layer 20 and two solidification glue films 40, great reduction processing degree of difficulty. After the release layer 60 is torn, the silica gel layer 50 is attached to the curved screen, so that the air exhaust performance is good, and the attachment is smooth. Therefore, the protective film 100 for the curved-surface mobile phone can be well attached to the curved-surface screen of the curved-surface mobile phone, the edge of the curved surface is not prone to warping and whitening, the preparation process is simple, the processing difficulty is low, and the processing cost is reduced.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. The utility model provides a protection film for curved surface cell-phone, a serial communication port, including the substrate layer, the substrate layer has upper surface and lower surface, the upper surface is equipped with sclerosis layer and ya keli in proper order and glues the system protection film, the lower surface is equipped with dual cure glue film, silica gel layer and leaves the type layer in proper order, dual cure glue film is that the thermosetting surface is dry and follow-up photocuring design is made again earlier, just the thickness on sclerosis layer is less than the thickness on dual cure glue film.

2. The protective film for curved mobile phones according to claim 1, wherein an OCA optical adhesive layer and a PET optical film layer are sequentially disposed between the dual curing adhesive layer and the silicone layer from top to bottom.

3. The protective film for curved mobile phones according to claim 2, wherein the thickness of the OCA optical adhesive layer is 50 to 120 μm.

4. The protective film for curved mobile phones according to claim 1, wherein the substrate layer is any one selected from the group consisting of a PET film layer, a TAC film layer, and an SRF film layer.

5. The protective film for curved mobile phones according to claim 1, wherein the thickness of the base material layer is 20 to 100 μm.

6. The protective film for curved mobile phones according to claim 1, wherein the hardened layer has a thickness of 3 to 7 μm.

7. The protective film for curved mobile phones according to claim 1, wherein the thickness of the dual cure adhesive layer is 30 to 80 μm.

8. The protective film for curved mobile phones according to claim 1, wherein the thickness of the silicone rubber layer is 20 to 70 μm.

9. The protective film for a curved-surface mobile phone of claim 1, wherein the hardened layer is a fingerprint-proof urethane acrylic hardened layer.

10. The protective film for curved mobile phones according to claim 1, wherein the dual cure adhesive layer is made of aliphatic urethane acrylate.