CN111320942A

CN111320942A - AB glue applied to mobile phone screen with fingerprint identification under screen and preparation method thereof

Info

Publication number: CN111320942A
Application number: CN201811541676.6A
Authority: CN
Inventors: 金国华
Original assignee: Zhejiang Xinlin New Material Technology Co ltd
Current assignee: Zhejiang Xinlin New Material Technology Co ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-06-23

Abstract

The invention discloses an AB adhesive applied to a fingerprint identification mobile phone screen under the screen, which comprises an upper release film layer, a high-viscosity acrylic adhesive layer, a using base film layer, an installing silica gel layer and a lower release film layer from top to bottom in sequence, and is characterized in that the using base film layer is made of one of PC, ABS, PMMA, COP, PP, SRF, TPU and TAC optical plastic films, the thickness of the using base film layer is 25-360 mu m, and the phase difference in a single direction within the angle range of 0-90 degrees is less than 30 nm. The AB glue can effectively improve the recognition degree and response speed of fingerprints.

Description

AB glue applied to mobile phone screen with fingerprint identification under screen and preparation method thereof

Technical Field

The invention relates to an AB adhesive, in particular to an AB adhesive applied to a fingerprint identification mobile phone screen under the screen and a preparation method thereof.

Background

AB glue for toughened glass of mobile phones in the current market is mainly based on PET. The AB glue production process mainly comprises the steps of firstly coating silica gel on one surface of a PET substrate and then coating a film, and coating a high-viscosity glue and coating a film on the other surface of the PET substrate. The coating process is complicated, two-time coating is needed, and the thickness is increased, so that the common toughened film cannot be applied to the fingerprint identification mobile phone under the screen.

Disclosure of Invention

The invention aims to provide the AB glue applied to the mobile phone screen with the underscreen fingerprint identification, which has high speed and high identification accuracy, and the preparation method thereof.

The invention aims to provide an AB adhesive applied to a mobile phone screen for identifying fingerprints under the screen, which comprises an upper release film layer, a high-viscosity acrylic adhesive layer, a using base film layer, an installing silica gel layer and a lower release film layer from top to bottom in sequence, and is characterized in that the using base film layer is made of one of PC, ABS, PMMA, COP, PP, SRF, TPU and TAC optical plastic films, the thickness of the using base film layer is 25-360 mu m, and the phase difference in a single direction within the angle range of 0-90 degrees is less than 30 nm.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized in that the upper release film layer is made of one of ABS, PMMA, COP, PP, SRF and a low-shrinkage PET optical plastic film, the thickness is 25-360 mu m, and the release force is 1-50 g; the lower release film layer is made of one of ABS, PMMA, COP, PP, SRF and PET optical plastic film with low shrinkage rate, the thickness is 25-360 mu m, and the release force is 1-50 g.

Further, the AB adhesive applied to the fingerprint identification mobile phone screen under the screen is characterized in that the high-viscosity acrylic adhesive layer is one of a high-viscosity acrylic adhesive layer, a high-viscosity polyurethane adhesive layer, a high-viscosity polyester adhesive layer and a high-viscosity adhesive layer, the thickness of the AB adhesive layer is 8-150 mu m, the peeling force to a steel plate is 5-3000g, the light transmittance is 89.5-92.5%, and the haze is 0.2-2.5%.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized in that the attaching and tearing force of the installation silica gel layer and the liquid crystal screen with the water drop angle of 115 degrees is larger than 15g, the peeling force is 2-800g, the light transmittance is 88-96%, and the haze is 0.2-2.5%.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized in that the upper release film layer is a PET silicone oil release film, the thickness of the PET silicone oil release film is 50-188 mu m, and the release force of the PET silicone oil release film is 3-8 g; the high-viscosity acrylic adhesive layer is a high-viscosity adhesive layer with the thickness of 15-50 mu m, the peeling force to the steel plate is 200-2000g, the light transmittance of the high-viscosity acrylic adhesive layer is 89.5-92.5%, and the haze is 0.5-1.5%; the thickness of the used base film layer is 50-188 μm, and the phase difference in a single direction of 0 degree or 90 degrees is less than 30 nm; the attaching and tearing force of the mounting silica gel layer and the liquid crystal screen with the water drop angle of 115 degrees is more than 20g, the peeling force is 2-10g, the light transmittance is 89.5% -92.5%, and the haze is 0.5% -1.5%; the lower release film layer is a PET fluorine release film, the thickness of the lower release film layer is 50-188 mu m, and the release force is 3-8 g.

Further, according to the AB glue applied to the fingerprint identification mobile phone screen under the screen, when the peeling force of the silica gel layer is within 15g, the non-processed surface of the PET release film with the flat surface is used as the release surface of the lower release film.

Further, the AB adhesive applied to the mobile phone screen for identifying the fingerprint under the screen comprises a plurality of layers of used base films, when the number of the used base films is more than 2, the used base films are bonded together through an adhesive layer formed by mixing an optical-grade adhesive layer or an optical-grade OCA with one or more of acrylic pressure-sensitive adhesive, polyurethane adhesive and polyester adhesive, and the peeling force range of the adhesive layer is 500-3000 g; the light transmittance is 88% -96%, and the haze range of the viscose layer is 0.1% -2.5%; the peeling force range of the adhesive layer is 500-5000 g; the light transmittance is 88% -96%, and the haze range of the viscose layer is 0.1% -2.5%.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen has the peeling force range of 1000-2000 g; the light transmittance of the viscose layer is 91.5% -95.5%; the haze range of the adhesive layer is 0.15% -0.5%.

The invention also aims to provide a method for preparing the AB adhesive applied to the mobile phone screen with the fingerprint identification function under the screen, which is formed by sequentially laminating and pressing a lower release film layer and a functional layer and specifically comprises the following steps: firstly, coating a silica gel layer on a lower release film layer, volatilizing a solvent through an oven and baking; after drying, coating a substrate layer and a high-viscosity acrylic adhesive layer on the silica gel mounting layer, and then drying; and coating a protective silica gel layer on the high-viscosity acrylic adhesive layer, and coating a release film layer.

Has the advantages that: the AB glue applied to the mobile phone screen for identifying the fingerprints under the screen adopts the base film layer with low phase difference in a single direction, particularly the phase difference in the single direction is less than 30nm, so that the luminous flux in the single direction can be maximized, and the identification degree and the response speed of the fingerprints are effectively improved. After the mobile phone screen is pasted with the film, if a user wears polarized glasses (sunglasses), the user can normally watch the screen, and the problem of color ghost (distortion) of the screen when the user wears the sunglasses before watching the screen can be avoided.

Drawings

Fig. 1 is a schematic view of a first structure of the AB glue applied to an underscreen fingerprint identification mobile phone screen (the used base film layer includes a single-layer used base film).

Fig. 2 is a schematic diagram of a second structure of the AB glue applied to the screen of the fingerprint identification mobile phone of the invention (the used base film layer includes a double-layer used base film).

Reference numerals: 1. The upper release film layer, the 2 high-viscosity acrylic adhesive layer, the 3 use base film layer, the 31 use base film layer, the 32 adhesive layer, the 4 installation silica gel layer and the 5 lower release film layer.

Detailed Description

The following describes in detail the AB glue applied to the screen of the mobile phone with fingerprint identification under the screen according to the drawings and the embodiments of the present disclosure.

As shown in fig. 1 and 2, an object of the present invention is to provide an AB glue applied to a fingerprint recognition mobile phone screen under the screen, which comprises an upper release film layer 1, a high-viscosity acrylic glue layer 2, a used base film layer, an installation silica gel layer 4 and a lower release film layer 5 sequentially from top to bottom, and is characterized in that the used base film layer is made of one of PC, ABs, PMMA, COP, PP, SRF, TPU and TAC optical plastic films, has a thickness of 25 to 360 μm, and has a phase difference of less than 30nm in a single direction at an angle of 0 to 90 °.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized in that the upper release film layer 1 is made of one of ABS, PMMA, COP, PP, SRF and a low-shrinkage PET optical plastic film, the thickness is 25-360 mu m, and the release force is 1-50 g; the lower release film layer 5 is made of one of ABS, PMMA, COP, PP, SRF and PET optical plastic films with low shrinkage rate, the thickness is 25-360 mu m, and the release force is 1-50 g.

Further, the high-viscosity acrylic adhesive layer 2 is one of a high-viscosity acrylic adhesive layer, a high-viscosity polyurethane adhesive layer, a high-viscosity polyester adhesive layer and a high-viscosity adhesive layer 32, the thickness of the high-viscosity acrylic adhesive layer is 8-150 mu m, the peeling force to a steel plate is 5-3000g, the light transmittance is 89.5% -92.5%, and the haze is 0.2% -2.5%.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized in that the attaching and tearing force of the silica gel layer 4 and the liquid crystal screen with the water drop angle of 115 degrees is larger than 15g, the peeling force is 2-800g, the light transmittance is 88-96%, and the haze is 0.2-2.5%.

Further, the AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized in that the upper release film layer 1 is a PET silicone oil release film, the thickness of the PET silicone oil release film is 50-188 mu m, and the release force of the PET silicone oil release film is 3-8 g; the high-viscosity acrylic adhesive layer 2 is a high-viscosity adhesive layer 32, the thickness of the high-viscosity acrylic adhesive layer is 15-50 mu m, the peeling force to a steel plate is 200-2000g, the light transmittance of the high-viscosity acrylic adhesive layer 2 is 89.5-92.5%, and the haze is 0.5-1.5%; the thickness of the used base film layer is 50-188 μm, and the phase difference in a single direction of 0 degree or 90 degrees is less than 30 nm; the attaching and tearing force of the silica gel layer 4 and the liquid crystal screen with the water drop angle of 115 degrees is more than 20g, the peeling force is 2-10g, the light transmittance is 89.5% -92.5%, and the haze is 0.5% -1.5%; the lower release film layer 5 is a PET fluorine release film with the thickness of 50-188 μm and the release force of 3-8 g.

Further, according to the AB glue applied to the mobile phone screen for identifying the fingerprint under the screen, when the peeling force of the silica gel layer is within 15g, the non-processed surface of the PET release film with the flat surface is adopted as the release surface of the lower release film in the lower release film layer 5.

Further, the AB adhesive applied to the mobile phone screen for identifying the fingerprint under the screen comprises a plurality of layers of used base films 31, when the used base films 31 are more than 2, the used base films 31 are bonded together through adhesive layers 32 formed by mixing optical-grade adhesive layers 32 or optical-grade OCA and one or more adhesives of acrylic pressure-sensitive adhesive, polyurethane adhesive and polyester adhesive, and the peeling force range of the adhesive layers 32 is 500-3000 g; the light transmittance is 88% -96%, and the haze range of the adhesive layer 32 is 0.1% -2.5%; the peeling force range of the adhesive layer 32 is 500-5000 g; the light transmittance is 88% -96%, and the haze range of the adhesive layer 32 is 0.1% -2.5%.

Further, the adhesive AB applied to the fingerprint identification mobile phone screen under the screen has the peeling force range of 1000-2000 g; the light transmittance of the adhesive layer 32 is 91.5% -95.5%; the haze range of the adhesive layer 32 is 0.15% -0.5%.

The invention also aims to provide a method for preparing the AB adhesive applied to the mobile phone screen with the fingerprint identification function under the screen, which is formed by sequentially laminating and pressing the lower release film layer 5 and the functional layer, and specifically comprises the following steps: firstly, coating a silica gel layer 4 on a lower release film layer 5, volatilizing a solvent through an oven and drying; after drying, coating the base layer and the high-viscosity acrylic adhesive layer 2 on the silica gel mounting layer 4, and then drying; and coating a protective silica gel layer on the high-viscosity acrylic adhesive layer 2, and coating a release film layer 1.

The AB glue applied to the screen of the mobile phone with the underscreen fingerprint identification is used for unlocking the mobile phone with the underscreen fingerprint which is popular in the current market, for example: the screen unlocking method has the advantages that the screen unlocking method can effectively improve the fingerprint identification rate and the response speed of fingerprint identification by virtue of the vivo X21, the vivoneX, the HUAWEI mate20, the millet mix 2S and the like, and has revolutionary improvement on the success rate and the response speed of screen unlocking. The recognition rate is more than 2 times of that of the protective film made of common optical materials (such as common PET, PP, PE, PI, TAC, TPU and the like), the recognition rate can reach 99.99 percent, and the corresponding recognition speed can be improved to be within 0.2m second.

When the mobile phone is used by a user, the lower release film layer 5 is removed, the mounting silica gel layer 4 is attached to a mobile phone screen (certainly, the mobile phone screen can also be applied to a camera and the like), the protective silica gel layer and the mounting adhesive layer are respectively arranged on the upper surface and the lower surface of the high-viscosity acrylic adhesive layer 2, the silica gel has strong adsorption capacity and can automatically exhaust and attach to the mobile phone, the high-viscosity acrylic adhesive layer 2 has good attachment performance with glass, can effectively absorb the acting force of impact and collision, reduces the impact force and the collision force of the screen, is beneficial to protecting the screen from being damaged or broken, cannot crack and explode, avoids unnecessary personal injury, simultaneously prevents the screen from being replaced, and reduces the use cost; and the protective film has good adhesiveness and scratch resistance, scratches can not directly act on the screen, and the screen can not be damaged. The adhesive property and the exhaust property of the silica gel layer are good, the use effect of the protective film is ensured, and no residue is left when the screen is peeled off after use; the high-viscosity acrylic adhesive layer 2 is high-temperature resistant, and can keep good adhesion in a high-temperature and high-humidity environment; the outermost side is provided with a protective silica gel layer, so that the using effect of the protective film is guaranteed again.

Because the base film 31 is a resin protective film with low phase difference in two directions, the recognition degree and the corresponding speed of fingerprints can be effectively improved, and the success rate and the reaction speed of screen unlocking are improved revolutionarily. For example, when the fingerprint unlocking mobile phone is used on a popular off-screen fingerprint unlocking mobile phone in the current markets such as vivoX21, millet mix 2S and the like, the fingerprint identification rate and the response speed of fingerprint identification can be effectively improved, the identification rate is more than 2 times of that of a common optical material (such as PET, PP, PE, PI, TAC, TPU and the like) protective film, the identification rate can reach 99.99%, and the corresponding identification speed can be improved to be within 0.2m second. After the protective film is pasted on the mobile phone screen, a user can normally watch the screen even wearing polarized glasses (sunglasses), and the problem of color ghost (distortion) of the screen when watching the screen after wearing the sunglasses in the prior art can be avoided.

The AB glue is used for adhering common toughened glass on the market at present and used as a substrate material of a toughened film, can effectively improve the recognition degree and the corresponding speed of fingerprints, and has revolutionary improvement on the success rate and the response speed of screen unlocking. The problem that a common toughened film in the market cannot be applied to a fingerprint identification mobile phone under a screen at present can be solved; the toughened glass of different radians of laminating, it is applicable in 2.5D 3.0D 4D screen protection film, can accomplish full laminating by the hot pressing, the product is used for a long time after the shaping and is not bounce-back, wrap up the screen comprehensively, prevent effectively that the cell-phone screen from dropping and leading to the phenomenon that the screen falls bad, play comprehensive guard action, simultaneously with the adhesion of cell-phone screen strong, especially also can produce high adhesion with the cell-phone screen of taking the AF function, excellent economic benefits and market value have.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims

1. The AB glue applied to the fingerprint identification mobile phone screen under the screen is characterized by comprising an upper release film layer, a high-viscosity acrylic glue layer, a using base film layer, an installing silica gel layer and a lower release film layer from top to bottom in sequence, wherein the using base film layer is made of one of PC, ABS, PMMA, COP, PP, SRF, TPU and TAC optical plastic films, the thickness of the using base film layer is 25-360 mu m, and the phase difference in a single direction within the angle range of 0-90 degrees is less than 30 nm.

2. The AB glue applied to the mobile phone screen with the lower fingerprint identification function of the claim 1, wherein the upper release film layer is made of one of ABS, PMMA, COP, PP, SRF and PET optical plastic film with low shrinkage rate, the thickness is 25-360 μm, and the release force is 1-50 g; the lower release film layer is made of one of ABS, PMMA, COP, PP, SRF and PET optical plastic film with low shrinkage rate, the thickness is 25-360 mu m, and the release force is 1-50 g.

3. The AB glue applied to the fingerprint recognition mobile phone screen under the screen as claimed in claim 1, wherein the high-viscosity acrylic glue layer is one of a high-viscosity acrylic glue layer, a high-viscosity polyurethane glue layer, a high-viscosity polyester glue layer and a high-viscosity viscose glue layer, the thickness of the AB glue layer is 8-150 μm, the peeling force to a steel plate is 5-3000g, the light transmittance is 89.5% -92.5%, and the haze is 0.2% -2.5%.

4. The AB glue applied to the fingerprint identification mobile phone screen under the screen as claimed in claim 1, wherein the attaching and tearing force of the installation silica gel layer and the liquid crystal screen with a 115-degree water drop angle is greater than 15g, the peeling force is 2-800g, the light transmittance is 88% -96%, and the haze is 0.2% -2.5%.

5. The AB glue applied to the fingerprint identification mobile phone screen below the screen according to claim 1, wherein the upper release film layer is a PET silicone oil release film with a thickness of 50-188 μm and a release force of 3-8 g; the high-viscosity acrylic adhesive layer is a high-viscosity adhesive layer with the thickness of 15-50 mu m, the peeling force to the steel plate is 200-2000g, the light transmittance of the high-viscosity acrylic adhesive layer is 89.5-92.5%, and the haze is 0.5-1.5%; the thickness of the used base film layer is 50-188 μm, and the phase difference in a single direction of 0 degree or 90 degrees is less than 30 nm; the attaching and tearing force of the mounting silica gel layer and the liquid crystal screen with the water drop angle of 115 degrees is more than 20g, the peeling force is 2-10g, the light transmittance is 89.5% -92.5%, and the haze is 0.5% -1.5%; the lower release film layer is a PET fluorine release film, the thickness of the lower release film layer is 50-188 mu m, and the release force is 3-8 g.

6. The AB glue applied to the screen of the mobile phone with the fingerprint identification function below the screen of claim 1, wherein the thickness of the base film layer is 50-188 μm, and the phase difference in a single direction of 0 ° or 90 ° is less than 15 nm.

7. The AB glue applied to the fingerprint identification mobile phone screen below the screen according to claim 5, wherein when the peeling force of the silicone layer is within 15g, the non-treated surface of the PET release film with a flat surface is adopted as the release surface of the lower release film on the lower release film layer.

8. The AB adhesive applied to the screen of the mobile phone with the fingerprint identification function under the screen of any one of claims 1 to 7, wherein the usage base film layer comprises a plurality of usage base films, when the usage base films comprise more than 2 usage base films, the usage base films are bonded together through an adhesive layer formed by mixing an optical-grade adhesive layer or an optical-grade OCA with one or more of acrylic pressure-sensitive adhesive, polyurethane adhesive and polyester adhesive, and the peeling force of the adhesive layer ranges from 500 g to 3000 g; the light transmittance is 88% -96%, and the haze range of the viscose layer is 0.1% -2.5%; the peeling force range of the adhesive layer is 500-5000 g; the light transmittance is 88% -96%, and the haze range of the viscose layer is 0.1% -2.5%.

9. The AB glue applied to the fingerprint identification mobile phone screen under the screen as claimed in claim 8, wherein the peeling force of the glue layer is in the range of 1000-2000 g; the light transmittance of the viscose layer is 91.5% -95.5%; the haze range of the adhesive layer is 0.15% -0.5%.