CN212269972U - 3D protective film capable of being subjected to heat setting or UV irradiation setting - Google Patents
3D protective film capable of being subjected to heat setting or UV irradiation setting Download PDFInfo
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- CN212269972U CN212269972U CN202021359518.1U CN202021359518U CN212269972U CN 212269972 U CN212269972 U CN 212269972U CN 202021359518 U CN202021359518 U CN 202021359518U CN 212269972 U CN212269972 U CN 212269972U
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Abstract
But 3D protection film of heat design or UV irradiation design relates to cell-phone protection film technical field, and it includes the protection film body, the protection film body includes the optical film substrate, the lower surface coating of optical film substrate has one deck base film layer, the shrinkage factor of base film layer is higher than the shrinkage factor of optical film substrate, the optical film substrate is curtain coating or coating fashioned TPU or PMMA film, base film layer is at the optical film substrate surface and through TPU or the ya keli material of UV solidification or thermosetting, the upper surface coating of optical film substrate has one deck self-repair coating or sclerosis scratch-resistant layer, the complex has one deck PET protection film on self-repair coating or the sclerosis scratch-resistant layer, the lower surface coating of base film layer has one deck exhaust glue film, the lower surface complex of exhaust glue film has one deck PET release film. The utility model discloses can guarantee the sensitivity of fingerprint unblock under the screen to improve processing procedure yield and production efficiency to a very big degree.
Description
Technical Field
The utility model relates to the technical field, especially, indicate a but 3D protection film of heat setting or UV irradiation design.
Background
With the development of science and technology, the underscreen fingerprint identification technology becomes a development trend of an unlocking mode of a smart phone, and more curved-surface-screen mobile phones are currently unlocked by adopting the underscreen fingerprint identification technology.
The existing protective film of the curved-surface screen mobile phone unlocked by applying the lower fingerprint of the screen mostly adopts an optical protective film made of an SRF (semi-circular polarized Filter) substrate, the production process of the protective film material is complex, the SRF substrate has a certain polarization angle, fixed-angle die cutting is needed in the production process, and the angle accuracy of all products after die cutting cannot be guaranteed, so that the problems of poor fitting degree and unlocking sensitivity are easily caused after the protective film is matched with a mobile phone screen, in addition, the transverse tearing strength of the SRF substrate is extremely poor, the thermal bending is easily cracked, the stability of the mass production is poor, the production process flow is complicated, and the steps of finding the polarization angle, adjusting and typesetting, die cutting, thermal bending, laminating and the like are included. Some curved-surface screen mobile phones applying unlocking of lower finger marks of the screen adopt a zero-deviation angle PET substrate or a TPU substrate as a protective film, but the loss of the zero-deviation angle PET is extremely high, the die-cut pieces of the curved-surface screen mobile phones need to be subjected to hot bending and shaping, the process yield is low, the production efficiency is low, and the mass production performance is poor; the TPU substrate has poor anti-imprint effect, and cannot meet the application requirements of consumers.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a but heat setting or UV shine the 3D protection film of design, the sensitivity of fingerprint unblock under the assurance screen to improve processing procedure yield and production efficiency in very big degree.
In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a but 3D protection film of heat finalization or UV irradiation finalization, includes the protection film body, the protection film body includes the optical film substrate, the lower surface coating of optical film substrate has one deck base film layer, the shrinkage factor of base film layer is higher than the shrinkage factor of optical film substrate, the optical film substrate is curtain coating or coating fashioned TPU or PMMA film, base film layer is coating at optical film substrate surface and through UV solidification or thermosetting TPU or ya keli material, the upper surface coating of optical film substrate has one deck self-repair coating or sclerosis scratch-resistant layer, the complex has one deck PET protection film on self-repair coating or the sclerosis scratch-resistant layer, the lower surface coating of base film layer has one deck exhaust glue film, the lower surface complex of exhaust glue film has one deck PET release film.
Preferably, the thickness of the optical film substrate is 25-75um, the light transmittance is more than or equal to 92%, the haze is less than or equal to 1%, the shrinkage rate is 150 ℃ for 30min or less 0.2%, the hardness is more than or equal to 65D, the tensile elongation at break is more than or equal to 200%, and the breaking strength is more than or equal to 30 MPa.
More preferably, the base film layer is a TPU material coated on the optical film substrate and UV-cured or thermally cured, and the TPU material is an aliphatic TPU or a polyether urethane.
Wherein the thickness of the base film layer is 15-75um, the ultraviolet absorptivity is more than or equal to 70 percent, the shrinkage rate at 80 ℃ is 0.3-2 percent, and the hardness is more than or equal to 90A.
Preferably, the self-repairing coating is a polyurethane acrylic coating, the thickness of the coating is 20-50um, and the hardness/load is as follows: 1H/200g, the water drop angle is more than or equal to 108 degrees, and the dynamic friction coefficient u is less than or equal to 0.15.
More preferably, the thickness of the hardened scratch-resistant layer is 1-5um, the water drop angle is more than or equal to 108 degrees, and the dynamic friction coefficient u is less than or equal to 0.1.
More preferably, the PET protective film is an acrylic protective film, and the thickness of the PET protective film is 25-85 um.
More preferably, the exhaust rubber layer is silica gel or acrylic rubber, and the hardness of the exhaust rubber layer is more than or equal to 65A.
More preferably, the protective film body further comprises a blue light prevention layer, wherein the blue light prevention layer is positioned between the optical film substrate and the base film layer or between the base film layer and the exhaust glue layer; or a blue light absorbent is added in any layer of the structure in the protective film body.
More preferably, the total thickness of the protective film body is 0.07-0.2 mm, the light transmittance is more than or equal to 91%, the haze is less than or equal to 1%, and the luminous flux is more than or equal to 90%.
The beneficial effects of the utility model reside in that: the optical film base material of the TPU or PMMA film and the base film layer of the TPU or acrylic material form a main base layer structure, and because no polarization angle exists, the luminous flux of the optical film base material at any angle is consistent, so that the problem that the processing angle is inaccurate due to the fact that the existing SRF and other materials need to be subjected to fixed-angle type die cutting processing is solved, the fit degree of the 3D protective film and a mobile phone screen is guaranteed after the 3D protective film is matched, and the sensitivity of fingerprint unlocking under the screen is further guaranteed; in addition, the processing flow of the 3D protective film can be completed only by die cutting, attaching, reheating setting or UV irradiation setting, and compared with the existing SRF substrate process flow, the processing flow is more simplified and optimized, and the process yield and the production efficiency can be improved to a great extent.
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 structural diagram of embodiment 3 of the present invention;
fig. 4 is another schematic structural diagram of embodiment 3 of the present invention.
The reference signs are:
1-optical film substrate 2-base film layer 3 a-self-repairing coating
3b hardening anti-scraping layer 4 PET protective film 5 exhaust glue layer
6-PET release film 7-blue light prevention 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.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly but via another feature. 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. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, the heat-settable or UV irradiation-settable 3D protective film comprises a protective film body, the protective film body comprises an optical film substrate 1, a base film layer 2 is coated on the lower surface of the optical film substrate 1, the shrinkage rate of the base film layer 2 is higher than that of the optical film substrate 1, the optical film substrate 1 is a cast or coated TPU or PMMA thin film, the base film layer 2 is a TPU or acrylic material coated on the surface of the optical film substrate 1 and cured or thermoset by UV, a self-repairing coating layer 3a is coated on the upper surface of the optical film substrate 1, a PET protective film 4 is compounded on the self-repairing coating layer 3a, an exhaust adhesive layer 5 is coated on the lower surface of the base film layer 2, and a PET release film 6 is compounded on the lower surface of the exhaust adhesive layer 5.
The 3D protection film capable of being heat-set or UV irradiation-set provided by the embodiment forms a main base layer structure by adopting the optical film substrate 1 of the TPU or PMMA film and the base film layer 2 of the TPU or acrylic material, and because no polarization angle exists, the luminous flux of the protection film at any angle is consistent, the problem that the processing angle is not accurate due to the fact that the existing materials such as SRF need to be subjected to fixed-angle die cutting processing, and the like is solved, so that the matching degree of the 3D protection film and a mobile phone screen is ensured, the sensitivity of finger-mark unlocking under the screen is further ensured, and rapid finger-mark identification under the screen is realized.
In addition, the processing flow of the 3D protective film can be completed only by die cutting, attaching, reheating setting or UV irradiation setting, and compared with the existing SRF substrate process flow, the processing flow is more simplified and optimized, and the process yield and the production efficiency can be improved to a great extent. It should be noted that, as the base film layer 2 is closer to the mobile phone screen, the shrinkage rate of the base film layer 2 on the lower surface of the optical film substrate 1 is set to be higher than that of the optical film substrate 1, so that the base film layer 2 can shrink to a relatively greater extent when heat-set or UV-irradiation-set into a 3D structure, so as to achieve good fit with the mobile phone screen and maintain good regularity with the optical film substrate 1 above the base film layer.
Preferably, the optical film substrate 1 can be produced by a thermal curing or photo-curing method, has few crystal points and sub-points, high flatness and good yellowing resistance, has the thickness of 25-75um, the light transmittance of more than or equal to 92 percent, the haze of less than or equal to 1 percent, the shrinkage of 150 ℃ for 30min of less than or equal to 0.2 percent, is temperature-resistant and low in shrinkage, the hardness of more than or equal to 65D, the tensile breaking elongation of more than or equal to 200 percent and the breaking strength of more than or equal to 30 MPa.
More preferably, when the base film layer 2 is selected from TPU materials coated on the surface of the optical film substrate 1 and subjected to UV curing or thermal curing, the TPU materials may be aliphatic TPU or polyether urethane, which has good yellowing resistance.
The thickness of the base film layer 2 in the embodiment is 15-75um, the ultraviolet absorption rate is more than or equal to 70%, the shrinkage rate at 80 ℃ is 0.3-2%, the hardness is more than or equal to 90A, and the 3D protective film has good shaping and softening effects after heating or UV irradiation, so that the 3D protective film does not need to be subjected to a hot bending forming process like the existing harder material.
Preferably, the self-repairing coating 3a is a polyurethane acrylic coating with good repairing effect and high resilience effect, the thickness of the coating is 20-50um, the resilience time is less than or equal to 10s (hardness/load: 1H/200 g), the water drop angle is more than or equal to 108 degrees, and the dynamic friction coefficient u is less than or equal to 0.15.
More preferably, the PET protective film 4 is a low-viscosity PET protective film having good air release and no precipitation, has a thickness of 25 to 85um, and may be preferably an acryl protective film, which is resistant to temperature and low in precipitation, can ensure sufficient water drop angle on the surface and good slip property, and has a touch feeling consistent with that of the existing SRF material, tempered glass, and the like.
More preferably, the degassing adhesive layer 5 is a degassing pressure sensitive adhesive, which may be a silicone adhesive or an acryl adhesive, having a good adhesion effect to the AF screen, an AF adhesion force is equal to or greater than 30gf (AF water drop angle 118 deg.), and the hardness of the degassing adhesive layer 5 is equal to or greater than 65A.
In addition, in the embodiment, the total thickness of the protective film body is 0.07-0.2 mm, the light transmittance is not less than 91%, the haze is not more than 1%, and the luminous flux at different angles is not less than 90%.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 only in that the structure of the self-repair coating 3a is replaced by a hardened scratch-proof layer 3b, that is, the structure between the optical film substrate 1 and the PET protective film 4 is the hardened scratch-proof coating 3b, wherein the thickness of the hardened scratch-proof layer 3b is 1-5um, the water drop angle is not less than 108 °, the dynamic friction coefficient u is not more than 0.1, the 3D protective film of the present embodiment is attached to the mobile phone screen after the PET release film 6 and the PET protective film 4 are torn off, the uppermost hardened scratch-proof coating 3b can have good fingerprint resistance and scratch resistance, the specific material thereof can be selected from commercially available hardened scratch-proof coatings, and in the present embodiment, the wear resistance of the hardened scratch-proof coating 3b formed by coating can meet not less than 2500 times (0000 # steel wool, 1 kg).
Based on the structures of the above-mentioned embodiment 1 and embodiment 2, the present application performed tests on each of them, and the results obtained are shown in the following table:
it can be seen through the data that table was last, the performance after this 3D protection film shaping is good, be applied to the curved surface screen of fingerprint unblock under the screen that is current and can be fine the 3D protection film of material forms such as the present SRF of substitution, simultaneously because the process steps can be effectively reduced, consequently, the advantage of the 3D protection film of this application is more obvious, market prospect is good, and the PET material of the high zero angle of deviation of loss, this 3D protection film is more durable, can effectively protect electronic equipment's such as cell-phones screen, prolong its life.
Example 3
The present embodiment is different from embodiment 1 or embodiment 2 only in that a structure for preventing blue light is added, and specifically includes the following three types of structures: as shown in fig. 3, the protective film body further includes a blue light-proof layer 7, and the blue light-proof layer 7 is located between the optical film substrate 1 and the base film layer 2; secondly, as shown in fig. 4, the protective film body further comprises a blue light prevention layer 7, and the blue light prevention layer 7 is positioned between the base film layer 2 and the exhaust glue layer 5; and thirdly, a blue light resisting layer is not independently added, but a blue light absorbent is added in any layer of structure in the protective film body. The blue light absorbent can be selected from commercially available blue light absorbents, which are not specifically limited in the present application, and the specific structure of the blue light preventing layer 7 can also be a separate coating layer containing the blue light absorbent, so that a person skilled in the art has no technical obstacle to the arrangement of the blue light preventing layer 7 to achieve the blue light preventing effect. This implementation increases the effect of preventing blue light on the basis of embodiment 1 or embodiment 2, can absorb the high-energy blue light that the screen gived off effectively to protect electronic product user's eyes.
The above-mentioned embodiment is 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 (10)
1. But 3D protection film of heat setting or UV irradiation design, including the protection film body, its characterized in that: the protective film body comprises an optical film substrate (1), the lower surface of the optical film substrate (1) is coated with a base film layer (2), the shrinkage rate of the base film layer (2) is higher than that of the optical film substrate (1), the optical film substrate (1) is a TPU or PMMA film formed by casting or coating, the base film layer (2) is a TPU or acrylic material which is coated on the surface of the optical film base material (1) and is subjected to UV curing or thermosetting, the upper surface of the optical film substrate (1) is coated with a self-repairing coating (3 a) or a hardening anti-scraping layer (3 b), a PET protective film (4) is compounded on the self-repairing coating (3 a) or the hardening anti-scraping layer (3 b), the lower surface of the base film layer (2) is coated with an exhaust glue layer (5), the lower surface of the exhaust adhesive layer (5) is compounded with a layer of PET release film (6).
2. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the thickness of the optical film substrate (1) is 25-75um, the light transmittance is more than or equal to 92%, the haze is less than or equal to 1%, the shrinkage rate is 150 ℃ for 30min or less 0.2%, the hardness is more than or equal to 65D, the tensile elongation at break is more than or equal to 200%, and the breaking strength is more than or equal to 30 MPa.
3. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the base film layer (2) is a TPU material which is coated on the surface of the optical film base material (1) and is subjected to UV curing or thermosetting, and the TPU material is aliphatic TPU or polyether polyurethane.
4. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the thickness of the base film layer (2) is 15-75um, the ultraviolet absorptivity is more than or equal to 70 percent, the shrinkage rate at 80 ℃ is 0.3-2 percent, and the hardness is more than or equal to 90A.
5. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the self-repairing coating (3 a) is a polyurethane acrylic coating, the thickness of the coating is 20-50um, and the hardness/load is as follows: 1H/200g, the water drop angle is more than or equal to 108 degrees, and the dynamic friction coefficient u is less than or equal to 0.15.
6. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the thickness of the hardened scratch-resistant layer (3 b) is 1-5um, the water drop angle is more than or equal to 108 degrees, and the dynamic friction coefficient u is less than or equal to 0.1.
7. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the PET protection film (4) is an acrylic protection film, and the thickness of the PET protection film is 25-85 um.
8. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the exhaust rubber layer (5) is silica gel or acrylic rubber, and the hardness of the exhaust rubber layer (5) is more than or equal to 65A.
9. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the protective film body further comprises a blue light prevention layer (7), and the blue light prevention layer (7) is located between the optical film substrate (1) and the base film layer (2) or the blue light prevention layer (7) is located between the base film layer (2) and the exhaust glue layer (5).
10. The heat-settable or UV-radiation-settable 3D protective film according to claim 1, wherein: the total thickness of the protective film body is 0.07-0.2 mm, the light transmittance is larger than or equal to 91%, the haze is smaller than or equal to 1%, and the luminous flux is larger than or equal to 90%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662649A (en) * | 2020-07-13 | 2020-09-15 | 衡山县佳诚新材料有限公司 | 3D protective film capable of being subjected to heat setting or UV irradiation setting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662649A (en) * | 2020-07-13 | 2020-09-15 | 衡山县佳诚新材料有限公司 | 3D protective film capable of being subjected to heat setting or UV irradiation setting |
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