CN213596199U - Low-dielectric explosion-proof film for mobile phone rear cover - Google Patents
Low-dielectric explosion-proof film for mobile phone rear cover Download PDFInfo
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- CN213596199U CN213596199U CN202022747745.8U CN202022747745U CN213596199U CN 213596199 U CN213596199 U CN 213596199U CN 202022747745 U CN202022747745 U CN 202022747745U CN 213596199 U CN213596199 U CN 213596199U
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Abstract
The utility model discloses a low dielectric rupture membrane for a mobile phone rear cover, which comprises a transparent substrate, an adhesive layer coated on the surface of one side of the transparent substrate, and a release membrane attached on the adhesive layer; the adhesive layer is formed by hot-melt coating of polyisobutylene hot melt adhesive, and the release film is a grid release film. The low dielectric explosion-proof film for the mobile phone rear cover adopts the polyisobutylene hot melt adhesive as the adhesive layer, and compared with the traditional solvent acrylic type adhesive, the low dielectric constant is low, thereby being beneficial to the transmission of 5G high-frequency and high-speed signals; and the emission is low, and the energy-saving and environment-friendly requirements advocated by the nation are met.
Description
Technical Field
The utility model relates to a membrane material technical field, concretely relates to lid is with low dielectric rupture membrane behind cell-phone.
Background
With the continuous popularization of smart phones, the smart phones are rapidly developed and advanced not only in function but also in appearance, and people can not leave the smart phones more and more in daily life and become a part of our lives. Based on the situation, the market of the mobile phone explosion-proof membrane for protecting the smart mobile phone is also developed rapidly, the mobile phone explosion-proof membrane can protect the screen of the mobile phone under the conditions that the mobile phone falls, sharp and hard objects are contacted and the like, the damage of the screen is avoided, the price of the mobile phone explosion-proof membrane is low, but a larger protection effect can be brought, so that the mobile phone explosion-proof membrane is popular with people and becomes a standard product of the smart mobile phone.
At present, the rapid development of the domestic communication technology and the 5G technology are mature day by day, and in order to avoid electromagnetic shielding, the mobile phone outer screen is mainly made of low dielectric materials such as plastics, glass and ceramics, and is beneficial to improving signal transmission. The existing explosion-proof membrane mainly adopts a solvent acrylic type adhesive, and the low-solid content adhesive has large solvent discharge amount and does not meet the energy-saving and environment-friendly requirements advocated by the state; the dielectric constant is high, and the high-frequency and high-speed signal transmission of 5G cannot be met; high initial adhesion and poor exhaust, which is not conducive to rework.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a low dielectric rupture membrane for mobile phone rear cover, which adopts polyisobutylene hot melt adhesive as adhesive layer, compared with the traditional solvent acrylic type adhesive, the rupture membrane has low dielectric constant, which is beneficial to the transmission of 5G high frequency and high speed signals; and the emission is low, and the energy-saving and environment-friendly requirements advocated by the nation are met.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a low dielectric rupture membrane for a mobile phone rear cover, which comprises a transparent substrate, an adhesive layer coated on the surface of one side of the transparent substrate, and a release membrane attached on the adhesive layer; the adhesive layer is formed by hot-melt coating of polyisobutylene hot melt adhesive, and the release film is a grid release film.
The utility model discloses in preferred scheme do, transparent substrate is PET substrate or TPU substrate.
In the preferred embodiment of the present invention, the thickness of the transparent substrate is 50 to 125 μm.
The preferable scheme in the utility model is that the coating thickness of the polyisobutylene hot melt adhesive is 25 mu m.
The utility model discloses in preferred scheme do, the net is from the type membrane, and the net size is 0.15mm, and the net degree of depth is 7-10 mu m.
The utility model discloses in preferred scheme do, the thickness that the net was from type membrane is 50-125 μm.
The preferable scheme in the utility model is that the other side surface of the transparent substrate is coated with a bottom coating.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the low dielectric explosion-proof film for the rear cover of the mobile phone adopts the polyisobutylene hot melt adhesive to replace a solvent type acrylic acid type adhesive in the traditional explosion-proof film, so that the initial viscosity of the adhesive is reduced, and rework is facilitated; on the other hand, the dielectric constant of the adhesive is reduced, which is beneficial to high-frequency and high-speed signal transmission; and the hot melting method replaces the traditional solvent coating method, so that the use and the emission of the solvent are greatly reduced, the environmental protection requirement is met, and the coating energy consumption is reduced.
2. The utility model discloses a lid is with low dielectric rupture membrane behind cell-phone, from the type membrane through laminating net, forms latticedly gluing the face, and the laminating of being convenient for is exhausted, is favorable to returning to the worker requirement.
Drawings
Fig. 1 is a schematic structural view of a low dielectric explosion-proof film for a mobile phone rear cover in an embodiment of the present invention;
the reference numbers in the figures illustrate: 1. a PET substrate; 2. an adhesive layer; 3. grid release film; 4. and (4) a base coat.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As described in the background art, at present, the 5G technology has become mature day by day in the rapid development of the domestic communication technology, and in order to avoid electromagnetic shielding, the mobile phone outer screen mainly uses low dielectric materials such as plastics, glass and ceramics, which is helpful to improve signal transmission. The existing explosion-proof membrane mainly adopts a solvent acrylic type adhesive, and the low-solid content adhesive has large solvent discharge amount and does not meet the energy-saving and environment-friendly requirements advocated by the state; the dielectric constant is high, and the high-frequency and high-speed signal transmission of 5G cannot be met; high initial adhesion and poor exhaust, which is not conducive to rework.
In order to solve the problem, the utility model provides a lid is with low dielectric rupture membrane behind cell-phone, please refer to fig. 1, this rupture membrane includes transparent substrate, coats adhesive layer 2 on a side surface of the transparent substrate, and laminate in from the type membrane on adhesive layer 2.
In the utility model discloses in, the explosion-proof membrane substrate that the field is commonly used can be selected for use to the transparent substrate, including but not limited to PET substrate 1, TPU substrate. The thickness of the transparent substrate is preferably 50 to 125. mu.m, and may be, for example, 50 μm, 80 μm, 100 μm, 125 μm. In this example, the transparent substrate was a PET substrate 1 having a thickness of 50 μm.
The utility model discloses in, adhesive layer 2 is formed by the polyisobutylene hot melt adhesive through the hot melt coating, the hot melt adhesive that the field is commonly used can be chooseed for use to the polyisobutylene hot melt adhesive. Polyisobutylene (PIB) is a saturated linear polymer, the main molecular chain of the polymer does not contain double bonds, long-chain branched chains exist, the polymer is weak in polarity, small in intermolecular force, and excellent in dielectric property and electric insulation property. The dielectric constant of common acrylic glue is generally about 4, while the dielectric constant of polyisobutylene adhesive is generally only about 2, so that the high-frequency and high-speed signal transmission is facilitated. And the change of the electrical property of the polyisobutylene adhesive along with the change of the environment is very small, so the reliability test requirement of the mobile phone can be met. In addition, the polyisobutylene adhesive also has the characteristics of low initial adhesion and high permanent adhesion, so that the polyisobutylene adhesive is beneficial to heavy rework during fitting.
In the utility model, the adhesive layer 2 is formed by hot-melt coating the polyisobutylene hot melt adhesive, and the coating thickness is preferably 25 μm. The hot melting method replaces the traditional solvent coating method, so that the use and the emission of the solvent are greatly reduced, the environmental protection requirement is met, and the coating energy consumption is reduced.
In the present invention, the release film is a grid release film 3, the thickness of the grid release film 3 is preferably 50-125 μm, for example, 50 μm, 80 μm, 100 μm, 125 μm, and the thickness of the grid release film 3 in this embodiment is 100 μm. Release film 3 through laminating net to form latticedly on gluing the face, not only be convenient for laminate the exhaust, can reduce just viscidity moreover, thereby be favorable to heavily doing over again the requirement. Preferably, the mesh size is 0.15mm by 0.15mm and the mesh depth is 7-10 μm. The grid with the specification can better meet the exhaust requirement in fitting.
In the utility model discloses, the opposite side surface coating of transparent substrate has under coat 4. The thickness of the primer layer 4 is generally in the nanometer level, and the purpose is to facilitate printing of various characters, logo patterns and the like on the back of the explosion-proof membrane.
The following table shows the performance test results of the burst films of examples and comparative examples (using a solvent-type acrylic adhesive and a general release film, and others consistent with the examples).
The results of the above table show that the utility model discloses an explosion-proof membrane, the initial viscidity is less than the comparative example, and keeps the viscidity to be higher than the comparative example to all be superior to current explosion-proof membrane in the comparative example in a plurality of indexes such as dielectric constant, anti warpage nature, air release and VOC content.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (7)
1. The utility model provides a lid is with low dielectric rupture membrane behind cell-phone, includes transparent substrate, coats adhesive layer on the surface of transparent substrate one side, and laminate in from type membrane on the adhesive layer, its characterized in that, the adhesive layer is formed by polyisobutylene hot melt adhesive through the hot melt coating, from type membrane for the net from type membrane.
2. The low dielectric explosion-proof film for the back cover of the mobile phone of claim 1, wherein the transparent substrate is a PET substrate or a TPU substrate.
3. The low dielectric explosion-proof film for the back cover of the mobile phone as claimed in claim 1, wherein the thickness of the transparent substrate is 50-125 μm.
4. The low dielectric explosion-proof film for the back cover of the mobile phone as claimed in claim 1, wherein the coating thickness of the polyisobutylene hot melt adhesive is 25 μm.
5. The low dielectric explosion-proof film for the mobile phone rear cover according to claim 1, wherein in the mesh release film, the mesh size is 0.15mm x 0.15mm, and the mesh depth is 7-10 μm.
6. The low dielectric explosion-proof film for the back cover of the mobile phone as claimed in claim 1, wherein the thickness of the grid release film is 50-125 μm.
7. The low dielectric explosion-proof film for the back cover of the mobile phone of claim 1, wherein the other side surface of the transparent substrate is coated with a primer layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022747745.8U CN213596199U (en) | 2020-11-24 | 2020-11-24 | Low-dielectric explosion-proof film for mobile phone rear cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022747745.8U CN213596199U (en) | 2020-11-24 | 2020-11-24 | Low-dielectric explosion-proof film for mobile phone rear cover |
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| CN213596199U true CN213596199U (en) | 2021-07-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023134495A1 (en) * | 2022-01-13 | 2023-07-20 | 荣耀终端有限公司 | Electronic device |
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- 2020-11-24 CN CN202022747745.8U patent/CN213596199U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023134495A1 (en) * | 2022-01-13 | 2023-07-20 | 荣耀终端有限公司 | Electronic device |
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