CN211079022U

CN211079022U - High-hardness hot-bending formed PET (polyethylene terephthalate) protective film

Info

Publication number: CN211079022U
Application number: CN201922328452.3U
Authority: CN
Inventors: 杨浩
Original assignee: Dongguan Comprehensive Research Aerospace Coating Technology Co ltd
Current assignee: Dongguan Comprehensive Research Aerospace Coating Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-24
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a high-hardness hot-bending formed PET protective film, which comprises a PET substrate, wherein the PET substrate is provided with a photocuring hardening coating, the hardening coating is covered with a silica gel cover film, the silica gel cover film is bonded with a release upper film through an OCA (optical clear adhesive) layer, and the bottom end of the PET substrate is bonded with a release bottom film through a silica gel layer; the thickness of the PET protective film is 130-215 micrometers, the thickness of the PET base material is 50-125 micrometers, the thickness of the hardening coating is 8-12 micrometers, and the thickness of the silica gel cover film is 60-75 micrometers. The utility model discloses a hardness of PET protection film is high, is difficult for the bounce-back after PET protection film radian is stereotyped.

Description

High-hardness hot-bending formed PET (polyethylene terephthalate) protective film

Technical Field

The utility model belongs to the technical field of the protection film and specifically relates to a fashioned PET protection film of high rigidity heat is bent.

Background

3D curved screen cell-phones are getting more and more popular with consumers and cell-phone manufacturers. The main problems of the existing 3D curved screen are as follows: if the 3D curved surface display screen is damaged, the maintenance cost is ultrahigh, and therefore the 3D curved surface display screen needs to be protected in an all-round mode. In the prior art, a 3D curved display screen is protected by a glass film (a tempered film) and a PET protective film. However, for 3D curved screen protection, both glass films and PET films have the defects of complex production and processing technology, insufficient product stability and the like.

In the prior art, a hot-bending PET protective film is commonly used for protecting a 3D curved display screen, most of the common hot-bending PET protective films in the market have the hardness of 2H pencil, the hot-bending PET protective films approximately need the high temperature of 150 degrees of hot bending, and the problem of arc rebound after the hot bending exists.

In the related art, a better technical solution for solving the above problems is still lacking.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to the defect of existence among the above-mentioned prior art, provide a fashioned PET protection film of high rigidity heat bending, the hardness of this PET protection film is high, difficult bounce-back behind the shaping of PET protection film radian.

In order to solve the technical problem, the utility model adopts the following technical scheme that the high-hardness hot-bending formed PET protective film comprises a PET substrate, wherein a photocuring hardened coating is arranged on the PET substrate, a silica gel cover film covers the hardened coating, a release upper film is bonded on the silica gel cover film through an OCA (optical clear adhesive) layer, and a release bottom film is bonded at the bottom end of the PET substrate through a silica gel layer; the thickness of the PET protective film is 130-215 micrometers, the thickness of the PET base material is 50-125 micrometers, the thickness of the hardening coating is 8-12 micrometers, and the thickness of the silica gel cover film is 60-75 micrometers.

As a further elaboration of the above technical solution:

in the above technical solution, the hardened coating is one of an epoxy resin coating, a polyester resin coating, and a furan resin coating.

In the technical scheme, the PET substrate is a PET film with the thickness of 50 μm or 100 μm or 125 μm.

In the above technical scheme, the silica gel cover film is a black PET silica gel cover film.

In the technical scheme, the silica gel cover film is a black PET silica gel cover film with the thickness of 60 μm or 75 μm.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a PET protection film is adopting at PET substrate glazing curing sclerosis coating and on the sclerosis coating silica gel epiphragma to through the postcure shaping, make the hardness of PET protection film reach 5H, the fashioned PET protection film stability of hot bending is high.

Drawings

FIG. 1 is a structural level diagram of the PET protective film of the present invention;

fig. 2 is a structural level diagram of the PET protective film composite release film.

In the figure, 100, a PET substrate, 200, a hardening coating, 300, a silica gel cover film, 400, an OCA glue layer, 500, a release upper film, 600, a silica gel layer, and 700, a release bottom film.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a lesser level than the second feature

FIG. 1 is a structural level diagram of the high hardness PET protective film of the present invention; fig. 2 is a structure level diagram of the high hardness PET protective film composite release protective film. The illustrated high-hardness hot-bending formed PET protective film is mainly used for protecting 3D curved-surface screen mobile phones and the like, and the high-hardness hot-bending formed PET protective film of the embodiment comprises a PET base material 100, wherein the thickness of the PET base material 100 in the embodiment is 50-125 μm, in practice, the PET base material 100 is PET base materials with three thickness specifications, namely 50 μm, 100 μm and 125 μm, and the PET base materials 100 are PET films; the PET substrate 100 is provided with a photocuring hardened coating 200, the thickness of the hardened coating 200 in the embodiment is 8-12 μm, in an optional embodiment of the embodiment, the hardened coating 200 can be one of an epoxy resin coating, a polyester resin coating and a furan resin coating, and in the actual processing process, the hardened coating 200 is formed by spraying hardening liquid and then performing UV photocuring; the hardened coating 200 is covered with the silica gel cover film 300, in the embodiment, the thickness of the silica gel cover film 300 is 60-75 μm, in the optional embodiment of the embodiment, the silica gel cover film 300 is a black PET silica gel cover film, and in practice, the black PET silica gel cover film can be selected from black PET silica gel cover films with two thickness specifications, specifically, black PET silica gel cover films with 60 μm and 75 μm thickness specifications can be selected, and the black PET silica gel cover film is selected for covering, so that the hardened coating 200 can be prevented from being additionally hardened by illumination in the transportation and processing processes; in order to prevent dust before the PET protective film is attached to the PET protective film, the silicone cover film 300 is bonded with the release upper film 500 through the OCA glue layer 400, the bottom end of the PET substrate 100 is bonded with the release bottom film 700 through the silicone layer 600, when the PET protective film is actually used, the release upper film 500 on the silicone cover film 300 is firstly torn off, then the whole PET protective film is bonded on a 3D curved-surface screen mobile phone, and then the release bottom film 700 on the PET substrate 100 is torn off; the total thickness of the PET protective film in the embodiment is 130-215 μm.

The PET protective film of the utility model semi-solidifies the hardened layer on the surface of the PET substrate 100 by adopting a semi-UV solidification mode, then is formed by punching and hot bending, and then is secondarily solidified; the hardness of the PET substrate 100 is about 1H due to semi-curing of the primary curing, so that the hot bending temperature can be reduced to about 110 ℃, the energy is saved, the efficiency is improved, and meanwhile, the hot bending forming is easier; and then, coating a black PET silica gel cover film on the hardened coating 200, performing secondary curing and full-curing setting, wherein the hardness of the PET protective film can be improved to 5H through the secondary fixing setting, and the radian of the PET protective film is not easy to rebound after the secondary curing setting.

The above description is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The high-hardness hot-bending-formed PET protective film is characterized by comprising a PET base material, wherein a photocuring hardening coating is arranged on the PET base material, a silica gel cover film covers the hardening coating, a release upper film is bonded on the silica gel cover film through an OCA (optically clear adhesive) layer, and a release bottom film is bonded at the bottom end of the PET base material through a silica gel layer; the thickness of the PET protective film is 130-215 micrometers, the thickness of the PET base material is 50-125 micrometers, the thickness of the hardening coating is 8-12 micrometers, and the thickness of the silica gel cover film is 60-75 micrometers.

2. A high-hardness hot-roll formed PET protective film according to claim 1, wherein the hardened coating is one of an epoxy resin coating, a polyester resin coating and a furan resin coating.

3. The protective film according to claim 1, wherein the PET substrate is a PET film with a thickness of 50 μm or 100 μm or 125 μm.

4. The high-hardness hot-bending PET protective film according to claim 1, wherein the silicone cover film is a black PET silicone cover film.

5. The high-hardness hot-bending PET protective film according to claim 4, wherein the silicone cover film is a black PET silicone cover film with a thickness of 60 μm or 75 μm.