CN109912827A - Unlocked by fingerprint 3D screen protecting film and forming method under screen with high ductibility - Google Patents

Unlocked by fingerprint 3D screen protecting film and forming method under screen with high ductibility Download PDF

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Publication number
CN109912827A
CN109912827A CN201910276153.1A CN201910276153A CN109912827A CN 109912827 A CN109912827 A CN 109912827A CN 201910276153 A CN201910276153 A CN 201910276153A CN 109912827 A CN109912827 A CN 109912827A
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CN
China
Prior art keywords
film
screen
tpu
fingerprint
unlocked
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Pending
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CN201910276153.1A
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Chinese (zh)
Inventor
刘少飞
周艺飞
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Dongguan Saiyue New Material Technology Co Ltd
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Dongguan Saiyue New Material Technology Co Ltd
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Priority to CN201910276153.1A priority Critical patent/CN109912827A/en
Publication of CN109912827A publication Critical patent/CN109912827A/en
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Abstract

The present invention discloses unlocked by fingerprint 3D screen protecting film and forming method under a kind of screen with high ductibility, this 3D screen protecting film includes phase difference PC film transparent less than 20 modification and TPU coating, which is that direct coating is incorporated in PC film surface.It is not easy to scratch as the substrate of protective film since PC film has high rigidity and good wear-resisting property.In addition, the phase difference of PC film is extremely low, there is high transmittance, low haze is suitable for shielding lower unlocked by fingerprint.And TPU itself is coated on PC film without phase difference, will not influence the phase difference of former film, guarantees the accuracy of unlocked by fingerprint.It adds, TPU coating is flexible, realizes protective film high stretch, and protective film finished product is covered with 3D curve screens radian screen note.Also, mobile phone operates sliding on safeguard film for cellular phone, hardly leaves a trace because of TPU super-hydrophobic oleophobic effects, self-cleaning is realized.

Description

Unlocked by fingerprint 3D screen protecting film and forming method under screen with high ductibility
Technical field
The present invention relates to safeguard film for cellular phone field technology, unlocked by fingerprint 3D under a kind of screen with high ductibility is referred in particular to Screen protecting film and forming method.
Background technique
Unlocked by fingerprint identification is completed below screen glass, is mainly reached using infrared or optical technology through unlike material The process of fingerprint recognition.Light is a kind of shear wave, and the direction of propagation is consistent with direction of vibration, influences the following several because being known as of rate Point:
1, the interference of light: N light wave is mutually superimposed when meeting in space, reinforces always in some regions, in another part area Domain slackens always, will cause stable strength distribution phenomenon.
2, the polarization of light: the phenomenon that spatial distribution of light wave electric vector vibration loses symmetry for the direction of propagation of light.
3, the scattering (reflection) of light: when light passes through inhomogeneous medium, segment beam deviates former direction and dispersive propagation.
Based on this, at present on the market the material with preferable translucidus have it is following several: COP, PC, TAC, SRF and general Logical PET.Wherein, COP, PC, TAC solve light interference and light polarization, however these materials itself have again it is irremediable Defect: COP be it is armorphous, PC is linear molecule, because without the orientation of light, low phase difference can perfectly avoid light Caused by interference and polarization the problem of fingerprint recognition sensitivity decline.However, COP is frangible, PC hardness is too low (hardness < 1H).TAC Excellent optical characteristics, but it is not resistant to water, and rigidity is not enough.SRF and common PET solve the interference of light and the scattering of light, SRF high phase Potential difference, but since its material stiffness is inadequate, post-processing processing procedure performance is poor.Common PET mechanical strength with higher, but phase Difference is lower, and only △ φ is 1000~3000.
Therefore, COP, PC, TAC, SRF and common PET cannot alone serve as safeguard film for cellular phone finished product.Need this field Technical staff develops with high intensity, translucidus, suitable for the safeguard film for cellular phone of unlocked by fingerprint.
Summary of the invention
In view of this, in view of the deficiencies of the prior art, the present invention aims to provide one kind to have high extend Property screen under unlocked by fingerprint 3D screen protecting film to be modified PC as basement membrane there is high intensity, hardness > 2H, and directly will TPU coating is incorporated on PC in a manner of being coated with, and using TPU is flexible and characteristic without phase difference, will not influence after coating The phase difference of protective film ensure that the lower unlocked by fingerprint function of screen, thus overcome the deficiencies in the prior art.
The present invention also provides the forming method of unlocked by fingerprint 3D screen protecting film under a kind of screen of high ductibility, moulding process Simply, step is few, and with coating process, free sticky conjunction reduces the dielectric layer of bonding, reduces dielectric layer and does to protective film phase It disturbs, improves unlocked by fingerprint precision under the screen of protective film.
To achieve the above object, the present invention is using following technical solution:
Unlocked by fingerprint 3D screen protecting film under a kind of screen with high ductibility is thin including phase difference PC transparent less than 20 modification Film and TPU coating, the TPU coating are that direct coating is incorporated in PC film surface.
As a preferred embodiment, the PC film with a thickness of 50mm, 80 mm or 100 mm, the thickness of the TPU coating Degree is 500-100 mm.
As a preferred embodiment, under the screen of the high ductibility unlocked by fingerprint 3D screen protecting film shape and Mobile phone screen Curtain matches, including intermediate region and border area, which arches upward upwards as arc, which extends downwardly shape At boundary.
As a preferred embodiment, the TPU coating is the surface layer of protective film, and the transparent PC film of modification is protective film Middle layer, successively paste in the bottom surface of the transparent PC film of the modification has adhesive layer and release paper again.
The forming method of unlocked by fingerprint 3D screen protecting film under a kind of screen with high ductibility, comprising the following steps:
Step 1 takes the transparent PC film of the modification of phase difference < 20, is wound into PC material volume;
One end of PC material volume is placed into draw in coating machine and be unfolded by step 2, and the other end of PC material volume passes through coating mechanism and baking After case, it is wound around on the wind-up roll of coating machine wait wind;
Step 3 heats prepared TPU slurry with cartridge heater, then pumps in the crack head of heating, from crack gap head discharging jet Enter feeder channel, SRF film is directly wound on applicator roll, is dragged by applicator roll, and TPU slurry is coated directly on SRF film, TPU slurry It is struck off again through comma scraper, and the coating wet-film thickness on applicator roll is guaranteed by the gap between comma scraper and applicator roll;
Step 4, the PC film for being coated with TPU slurry enter baking oven, and the organic solvent in TPU slurry volatilizees after reaching volatilization point, TPU slurry thermoplastic film forming is attached to PC film surface.
As a preferred embodiment, in step 1, the refractive index 1.585 of the transparent PC film of modification, light transmittance 95%, 140 j/m of impact resistant strength value, 77 M scale of Rockwell hardness, 2230 Mpa of bending modulus, tensile yield point are 61 Mpa, are stretched Breaking point is 140 Mpa, phase difference 12.
As a preferred embodiment, in step 1, the transparent PC film of modification is the modified PC material of nano anti-biotic material Body.
As a preferred embodiment, in step 3, the preparation of TPU slurry be TPU modified is dissolved in it is highly polar In organic solvent, viscosity is controlled at 800-1000cps/25 DEG C.
As a preferred embodiment, after step 4, it is also necessary to follow the steps below
Step 5: it is coated with layer of silica gel on the surface of TPU membrane, is finally bonded release film;
Step 6: ruling, cut out it is large stretch of, after by sheet cutting into strips;
Step 7: single pole piece is made in pole piece by film-making;
Step 8: single pole piece integer is 3D protective film finished product by integer.
The present invention has obvious advantages and beneficial effects compared with the existing technology, specifically, by above-mentioned technical proposal It is found that 3D screen protecting film of the invention is using a kind of phase difference PC film transparent less than 20 modification as substrate, then directly It connects and is coated with TPU coating in PC film surface.Since PC film has high rigidity (hardness > 2H) and good wear-resisting property (1000g/500 times), it is not easy to scratch as the substrate of protective film.In addition, the phase difference of PC film is extremely low (phase difference < 20), have High transmittance, low haze (T >=92%, H≤0.6) are suitable for shielding lower unlocked by fingerprint.And TPU coating is flexible, realizes protection Film high stretch enables protective film finished product to cover with 3D curve screens radian screen note.Add, TPU itself without phase difference, It is coated on PC film, will not influence the phase difference of former film, guarantees the accuracy of unlocked by fingerprint.Also, because TPU it is super-hydrophobic (θ >= 110 °) oleophobic effects (anti-fingerprint greasy dirt), mobile phone operates sliding on safeguard film for cellular phone, hardly leaves a trace, realize from Clean effect.
The forming method of unlocked by fingerprint 3D screen protecting film under a kind of screen with high ductibility of the invention, with solution at Embrane method, by modified TPU(thermoplastic polyurethane resin) it is dissolved in highly polar organic solvent, it is coated using accurate coating apparatus Under specific PC membrane material surface, different oven temperature parameters, organic solvent volatilizees after reaching volatilization point in system, polyurethane Resinous thermoplastic's film forming.This TPU membrane is that direct coating is incorporated in PC film surface, so that thickness is uniform after TPU membrane film forming, surface is dry It is refreshing, while ply adhesion is good.Substitution tradition directly pastes multiple mode with TPU in this approach, exempts between TPU membrane and PC film Dielectric layer, production is more convenient, and final product quality is more preferable.Further more, phase difference < 20 PC, not two-way since TPU is accurate coating It stretches, polyurethane molecular non-polarized tends to, so will not change the high difference characteristic of PC, membrane material entirety phase difference is higher, can be with Meet and shields lower unlocked by fingerprint requirement.After TPU membrane is combined with the coating of PC film, high stretch is obtained, the mobile phone of high mechanical strength is protected Cuticula.
In order to explain the structural features and functions of the invention more clearly, come with reference to the accompanying drawing with specific embodiment to this hair It is bright to be described in detail.
Detailed description of the invention
Fig. 1 is the 3D screen protecting film cross-sectional view of embodiments of the present invention.
Fig. 2 is the layer structure schematic diagram of the 3D screen protecting film of embodiments of the present invention.
Fig. 3 is the structural schematic diagram of the TPU coating apparatus of embodiments of the present invention.
Fig. 4 is the schematic diagram of the coating mechanism of the TPU coating apparatus of embodiments of the present invention.
Description of drawing identification:
100, intermediate region 200, border area
10, PC film 20, TPU coating
30, adhesive layer 40, release paper
50, coating mechanism 51, crack head
52, applicator roll 53, comma scraper
54, feeder channel 60, baking oven
70, wind-up roll.
Specific embodiment
It please refers to shown in Fig. 1 and Fig. 2, is that one kind has that show the specific structure of the preferred embodiments of the invention Unlocked by fingerprint 3D screen protecting film under the screen of high ductibility, including phase difference PC film 10 transparent less than 20 modification and TPU(heat Plastic polyurethane resin) coating, which is that direct coating is incorporated in 10 surface of PC film.In this implementation, the TPU Coating 20 is the surface layer of protective film, and the transparent PC film 10 of modification is the middle layer of protective film, in the transparent PC film of the modification 10 bottom surface, which is successively pasted again, adhesive layer 30 and release paper 40.
Wherein, the PC film 10 with a thickness of 50mm, 80 mm or 100 mm, the TPU coating 20 with a thickness of 500- 100 mm.In the present embodiment, the refractive index 1.585 of the transparent PC film 10 of modification, light transmittance 95%, impact resistant strength value 140 j/m, 77 M scale of Rockwell hardness, 2230 Mpa of bending modulus, tensile yield point are 61 Mpa, and tension failure point is 140 Mpa, phase difference 12.Such transparent PC film 10 of modification can by buy the modified PC of existing Japanese Supreme Being people on the market expect into Row processing and fabricating.After the present inventor melts the modified PC material of the Japanese Supreme Being people of buying, then it is modified through nano silver antibacterial material, to obtain The modified PC material of nano silver antibacterial material is obtained, can effectively be killed with gold-coloured staphylococci, Escherichia coli and Candida albicans The activity of the floras such as bacterium.The PC film 10 has good translucency, high mechanical strength, impact resistance, refractive index height.Also, simultaneously And PC is linear molecule, because without the orientation of light, low phase difference can be avoided perfectly caused by interference and the polarization of light The problem of fingerprint recognition sensitivity declines.However single one layer of PC film 10 be intolerant to strong acid, highly basic, not UV resistant, therefore needs Will with it is compound with its function film, to enhance the function of protective film.
Protective film of the invention is not that 2D screen protects film, and it is a kind of 3D screen protecting film, shape that also non-2.5D screen, which protects film, Shape matches with mobile phone 3D screen, including intermediate region 100 and border area 200, which arches upward upwards as arc Shape, the border area 200 are downwardly extending boundary, so as to be bonded completely with mobile phone 3D screen.
As shown in Figure 3 and Figure 4, the present invention provides a kind of with high ductibility to realize manufacturing for the above product Screen under unlocked by fingerprint 3D screen protecting film forming method, comprising the following steps:
Step 1 takes the transparent PC film 10 of the modification of phase difference < 20, is wound into PC material volume;
One end of PC material volume is placed into draw in coating machine and be unfolded by step 2, and the other end of PC material volume passes through 50 He of coating mechanism After baking oven 60, it is wound around on the wind-up roll 70 of coating machine wait wind;
Step 3 heats prepared TPU slurry with cartridge heater, then pumps in the crack head 51 of heating, sprays from crack gap head Feeder channel 54 is flowed into, SRF film is directly wound on applicator roll 52, is dragged by applicator roll 52, and TPU slurry is coated directly on SRF film, TPU slurry strikes off through comma scraper 53 again, and guarantees the painting on applicator roll 52 by the gap between comma scraper 53 and applicator roll 52 Expect wet-film thickness;
Step 4, the PC film 10 for being coated with TPU slurry enter baking oven 60, and the organic solvent in TPU slurry is waved after reaching volatilization point Hair, TPU slurry thermoplastic film forming are attached to 10 surface of PC film.
Wherein, in step 1, the refractive index 1.585 of the transparent PC film 10 of modification, light transmittance 95%, impact resistant strength 140 j/m of value, 77 M scale of Rockwell hardness, 2230 Mpa of bending modulus, tensile yield point are 61 Mpa, and tension failure point is 140 Mpa, phase difference 12.The transparent PC film 10 of modification is the modified PC material bodies of nano anti-biotic material.
In step 3, the preparation of TPU slurry is that TPU modified is dissolved in highly polar organic solvent, and control is viscous Degree is at 800-1000cps/25 DEG C.
After step 4, it is also necessary to follow the steps below
Step 5: it is coated with layer of silica gel on the surface of TPU membrane, is finally bonded release film;
Step 6: ruling, cut out it is large stretch of, after by sheet cutting into strips;
Step 7: single pole piece is made in pole piece by film-making;
Step 8: single pole piece integer is 3D protective film finished product by integer.
Finished product obtained by above step is tested by experiment, following data is obtained, referring to table 1.
The performance test of 1 3D screen protecting film of table
It can be seen that the flexibility of rigidity and TPU of the 3D screen protecting film of the present invention with PC, and there is lower phase difference (phase difference < 20), light transmittance is high, and light is stablized, and has good polarization effect, shields lower fingerprint high sensitivity.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention, Therefore any subtle modifications, equivalent variations and modifications to the above embodiments according to the technical essence of the invention, still Belong in the range of technical solution of the present invention.

Claims (9)

1. unlocked by fingerprint 3D screen protecting film under a kind of screen with high ductibility, it is characterised in that: including phase difference less than 20 The transparent PC film (10) of modification and the TPU coating (20) without phase difference, it is thin which is that direct coating is incorporated in PC Film (10) surface.
2. unlocked by fingerprint 3D screen protecting film under the screen according to claim 1 with high ductibility, it is characterised in that: institute State PC film (10) with a thickness of 50mm, 80 mm or 100 mm, the TPU coating (20) with a thickness of 500-100 mm.
3. unlocked by fingerprint 3D screen protecting film under the screen according to claim 1 with high ductibility, it is characterised in that: institute The shape for stating unlocked by fingerprint 3D screen protecting film under the screen of high ductibility matches with mobile phone screen, including intermediate region (100) With border area (200), which arches upward upwards as arc, which is downwardly extending side Boundary.
4. unlocked by fingerprint 3D screen protecting film under the screen according to claim 1 with high ductibility, it is characterised in that: institute The surface layer that TPU coating (20) is protective film is stated, the transparent PC film (10) of modification is the middle layer of protective film, saturating in the modification The bottom surface of bright PC film (10), which is successively pasted again, adhesive layer (30) and release paper (40).
5. the forming method of unlocked by fingerprint 3D screen protecting film under a kind of screen with high ductibility, it is characterised in that: including with Lower step:
Step 1 takes the transparent PC film (10) of the modification of phase difference < 20, is wound into PC material volume;
One end of PC material volume is placed into draw in coating machine and be unfolded by step 2, and the other end of PC material volume passes through coating mechanism (50) After baking oven (60), it is wound around on the wind-up roll (70) of coating machine wait wind;
Step 3 heats prepared TPU slurry with cartridge heater, then pumps in the crack head (51) of heating, sprays from crack gap head Feeder channel is flowed into out, and SRF film is directly wound on applicator roll (52), is dragged by applicator roll (52), and TPU slurry is coated directly onto SRF On film, TPU slurry strikes off through comma scraper (53) again, and guarantees coating by the gap between comma scraper (53) and applicator roll (52) Coating wet-film thickness on roller (52);
Step 4, the PC film (10) for being coated with TPU slurry enter baking oven (60), and the organic solvent in TPU slurry reaches volatilization point After volatilize, TPU slurry thermoplastic film forming be attached to PC film (10) surface.
6. the forming method of unlocked by fingerprint 3D screen protecting film under the screen according to claim 5 with high ductibility, It is characterized in that: in step 1, the refractive index 1.585 of the transparent PC film (10) of modification, light transmittance 95%, impact resistant strength value 140 j/m, 77 M scale of Rockwell hardness, 2230 Mpa of bending modulus, tensile yield point are 61 Mpa, and tension failure point is 140 Mpa, phase difference 12.
7. the forming method of unlocked by fingerprint 3D screen protecting film under the screen according to claim 1 with high ductibility, Be characterized in that: in step 1, the transparent PC film (10) of modification is the modified PC material bodies of nano anti-biotic material.
8. the forming method of unlocked by fingerprint 3D screen protecting film under the screen according to claim 1 with high ductibility, Be characterized in that: in step 3, the preparation of TPU slurry is that TPU modified is dissolved in highly polar organic solvent, control Viscosity is at 800-1000cps/25 DEG C.
9. the forming method of unlocked by fingerprint 3D screen protecting film under the screen according to claim 1 with high ductibility, It is characterized in that: after step 4, it is also necessary to follow the steps below
Step 5: it is coated with layer of silica gel on the surface of TPU membrane, is finally bonded release film;
Step 6: ruling, cut out it is large stretch of, after by sheet cutting into strips;
Step 7: single pole piece is made in pole piece by film-making;
Step 8: single pole piece integer is 3D protective film finished product by integer.
CN201910276153.1A 2019-04-08 2019-04-08 Unlocked by fingerprint 3D screen protecting film and forming method under screen with high ductibility Pending CN109912827A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110264883A (en) * 2019-06-28 2019-09-20 云谷(固安)科技有限公司 A kind of curved face display panel laminating apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013108957A1 (en) * 2012-01-16 2013-07-25 주식회사 윅스켐 Multi-layered film for protecting display panel
CN204020146U (en) * 2014-07-23 2014-12-17 苏州斯迪克新材料科技股份有限公司 A kind of TPU explosive-proof protector film
CN204488154U (en) * 2014-12-18 2015-07-22 东莞市纳利光学材料有限公司 One has cambered surface coated guarantor's type shock resistance diaphragm
JP3215796U (en) * 2017-02-14 2018-04-12 東莞捷爾信實業有限公司 Tempered glass film for curved screen mobile phones, all intimately bonded with adhesive
CN108116020A (en) * 2018-02-05 2018-06-05 东莞市亮雅塑料制品有限公司 3D Curved screen TPU protective films and preparation method thereof
CN108943979A (en) * 2018-09-13 2018-12-07 东莞市赛越新材料科技有限公司 Unlocked by fingerprint mobile phone protects photocuring film production method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013108957A1 (en) * 2012-01-16 2013-07-25 주식회사 윅스켐 Multi-layered film for protecting display panel
CN204020146U (en) * 2014-07-23 2014-12-17 苏州斯迪克新材料科技股份有限公司 A kind of TPU explosive-proof protector film
CN204488154U (en) * 2014-12-18 2015-07-22 东莞市纳利光学材料有限公司 One has cambered surface coated guarantor's type shock resistance diaphragm
JP3215796U (en) * 2017-02-14 2018-04-12 東莞捷爾信實業有限公司 Tempered glass film for curved screen mobile phones, all intimately bonded with adhesive
CN108116020A (en) * 2018-02-05 2018-06-05 东莞市亮雅塑料制品有限公司 3D Curved screen TPU protective films and preparation method thereof
CN108943979A (en) * 2018-09-13 2018-12-07 东莞市赛越新材料科技有限公司 Unlocked by fingerprint mobile phone protects photocuring film production method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110264883A (en) * 2019-06-28 2019-09-20 云谷(固安)科技有限公司 A kind of curved face display panel laminating apparatus
CN110264883B (en) * 2019-06-28 2021-04-23 云谷(固安)科技有限公司 Curved surface display panel laminating device

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Application publication date: 20190621