CN112882142A - Friction-resistant light diffusion film and manufacturing method thereof - Google Patents
Friction-resistant light diffusion film and manufacturing method thereof Download PDFInfo
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- CN112882142A CN112882142A CN202011576300.6A CN202011576300A CN112882142A CN 112882142 A CN112882142 A CN 112882142A CN 202011576300 A CN202011576300 A CN 202011576300A CN 112882142 A CN112882142 A CN 112882142A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
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- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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Abstract
The invention discloses a friction-resistant light diffusion film which comprises a PET (polyethylene terephthalate) base material layer, wherein a light diffusion layer is arranged on the upper surface of the PET base material layer, an isolation layer is arranged on the lower surface of the PET base material layer, the isolation layer comprises a first resin coating and a plurality of Microsoft particles, the first resin coating is fixed on the lower surface of the PET base material layer in a coating mode, the Microsoft particles are embedded on the surface of the first resin coating, the Microsoft particles enable the surface of the isolation layer to form an uneven plane, an anti-friction layer is arranged on one side, far away from the PET base material layer, of the isolation layer, and the anti-friction layer covers the first resin coating and the surface. The invention provides a friction-resistant light diffusion film, which can better protect particles on the surface of a light diffusion film isolation layer, reduce the friction coefficient of the light diffusion film and improve the friction resistance of the light diffusion film. The invention also provides a preparation method of the friction-resistant light diffusion film.
Description
Technical Field
The invention relates to the technical field of light diffusion films, in particular to a friction-resistant light diffusion film and a manufacturing method thereof.
Background
The diffusion film is mainly used for a backlight source part of an LCD module, mainly plays a role of correcting a diffusion angle in a backlight source structure, can increase a light radiation area, but reduces light intensity of a unit area, namely luminance. After the light source is diffused by the diffusion material, it can become a 2-order light source with larger area, better uniformity and stable chromaticity. The light scattering plate has the function of diffusing light, namely, the light can be scattered on the surface of the light scattering plate, and the light can be diffused out softly and uniformly; the basic structure of most diffuser films is to coat the transparent substrate, such as PET, with optically diffusing particles on both sides.
The diffusion barrier mainly used cell-phone backlight through the scattering effect of diffusion barrier, reaches the even of luminance in a poor light, divide into 3 layers through optical diffusion, and the first layer is the light diffusion layer, and the second floor is the PET substrate layer, and the third layer is the isolation layer, in order to improve the anti-scratch effect of isolation layer particle, can choose the PA that coefficient of friction is lower promptly the nylon particle for use, even the teflon particle. Because the surface friction coefficient of the particles is low, the bonding firmness is relatively poor when the glue is cured, and the particles are easy to fall off and damage in the using process, so that the light diffusion film does not have good friction resistance.
Disclosure of Invention
The invention aims to provide a friction-resistant light diffusion film and a manufacturing method thereof, which can ensure that particles on the surface of a separation layer of the light diffusion film can be well protected, reduce the friction coefficient of the light diffusion film and improve the friction resistance of the light diffusion film.
The invention discloses a friction-resistant light diffusion film and a preparation method thereof, and the technical scheme adopted by the invention is as follows:
the utility model provides a antifriction light diffusion membrane, includes the PET substrate layer, PET substrate layer upper surface is equipped with the light diffusion layer, PET substrate layer lower surface is equipped with the isolation layer, the isolation layer includes first resin coating and a plurality of Microsoft particle, first resin coating adopts the coating mode to fix at PET substrate layer lower surface, Microsoft particle inlays in first resin coating surface, Microsoft particle makes the isolation layer surface form unevenness's plane, PET substrate layer one side is kept away from to the isolation layer is equipped with the antifriction layer, the antifriction layer covers in the first resin coating and the Microsoft particle surface of isolation layer.
Preferably, the light diffusion layer comprises a second resin coating and a plurality of diffusion particles, the second resin coating is fixed on the upper surface of the PET base material in a coating mode, and the diffusion particles are embedded in the surface of the second resin coating.
Preferably, the thickness of the PET base material layer is 38-100 μm, the thickness of the light diffusion layer is 9-11 μm, the thickness of the isolation layer is 8-10 μm, and the thickness of the anti-friction layer is 1-2 um.
Preferably, the microsoft particles are PBMA microspheres.
A preparation method of a friction-resistant light diffusion film comprises the following steps:
s1, preparing a coating, namely preparing a light diffusion layer coating, an isolation layer coating and an anti-friction layer coating in advance;
s2, coating the light diffusion layer, namely coating the light diffusion layer paint prepared in the S1 on the upper surface of the PET base material layer;
s3, drying the light diffusion layer, and drying the upper surface of the PET substrate layer coated in the step S2 to cure the light diffusion layer coating on the upper surface of the PET substrate layer;
s4, coating the isolation layer, namely coating the prepared isolation layer coating of S1 on the lower surface of the PET substrate layer;
s5, drying the isolation layer, and drying the lower surface of the PET substrate layer coated in the step S4 to cure the isolation layer coating on the lower surface of the PET substrate layer;
s6, coating the anti-friction layer, namely coating the anti-friction layer coating prepared in the step S1 on the surface of the isolation layer formed by the step S5 in a curing mode;
s7, drying the anti-friction layer, and drying the anti-friction layer coating coated in the step S6 to form the anti-friction layer on the surface of the isolation layer;
and S8, detecting the finished product dried in the S7 mode to obtain the finished product meeting the detection requirement, and forming the anti-friction light diffusion film.
Preferably, the weight percentage of the raw materials of the light diffusion layer coating is 100 parts of hydroxyl acrylic resin, 20-25 parts of ethyl acetate, 10-20 parts of butyl acetate, 5-10 parts of PMMA, and 1-3 parts of curing agent. Mixing PMMA particles with a diluent, dispersing by using a high-speed dispersing machine, adding hydroxyl acrylic resin, continuously dispersing by using a high-speed dispersing agent, finally adding a curing agent, and dispersing by using the high-speed dispersing agent to finish the coating preparation process of the coating diffusion layer.
According to a preferable scheme, the weight percentage of the raw materials of the isolating layer coating is that acrylic resin is 100, ethyl acetate is 40-50, PBMA particle resin is 25-35 and curing agent is 1-3, PBMA particles and diluent are dispersed by using a high-speed dispersion machine, then acrylic resin is added for continuous dispersion, and finally curing agent is added for continuous dispersion for 10 minutes, so that the coating preparation process of the isolating layer is completed.
Preferably, the anti-friction layer coating comprises a main agent and a curing agent, wherein the mass percentage ratio of the main agent to the curing agent is 8-10: 1; the main agent comprises the following components in percentage by weight: 55-60% of tetrafluoro resin, 1-3% of film forming additive, 25-32% of filler and 5-19% of solvent; the curing agent comprises: and (3) adding the tetrafluoro resin, the film-forming assistant, the filler and the solvent into the high-speed dispersion machine for dispersion, and then adding the curing agent into the high-speed dispersion machine for continuous dispersion for 10 minutes to finish the preparation process of the coating for coating the anti-friction layer.
Preferably, the tetrafluoro resin is a vinyl tetrafluoro resin.
As a preferred scheme, the drying treatment adopts multi-gradient drying treatment, comprises 6 sections of drying boxes, and adopts different temperatures to carry out multi-gradient drying treatment.
The invention discloses a friction-resistant light diffusion film which has the beneficial effects that: be equipped with the light diffusion layer at PET substrate layer upper surface, play the effect of light diffusion through the light diffusion layer, be equipped with the isolation layer below the PET substrate layer, the isolation layer mainly plays spaced effect, prevent that antifriction light diffusion membrane from forming the condition of pasting and covering the interference with PC, and still be equipped with anti friction layer on the isolation layer surface, anti friction layer covers in the first resin coating and the microsoft particle surface of isolation layer, anti friction layer mainly reduces light diffusion membrane coefficient of surface friction, it is more smooth to make light diffusion membrane surface, the effect of difficult fish tail light guide plate simultaneously, and can also protect the microsoft particle on the isolation layer, avoid taking place to drop between microsoft particle and the first resin coating, thereby the microsoft particle that makes antifriction light diffusion membrane isolation layer surface obtains better protection.
Drawings
FIG. 1 is a schematic view of the structure of a friction-resistant light diffusion film according to the present invention.
Detailed Description
The invention will be further elucidated and described with reference to the embodiments and drawings of the specification:
referring to fig. 1, a friction-resistant light diffusion film includes a PET substrate layer 10, a light diffusion layer 20 disposed on an upper surface of the PET substrate layer 10, and an isolation layer 30 disposed on a lower surface of the PET substrate layer 10.
The isolation layer 30 comprises a first resin coating 31 and a plurality of microsoft particles 32, wherein the first resin coating 31 is fixed on the lower surface of the PET substrate layer 10 in a coating mode, the microsoft particles 32 are embedded on the surface of the first resin coating 31, and the microsoft particles 32 enable the surface of the isolation layer 30 to form an uneven plane.
An anti-friction layer 40 is arranged on one side of the isolation layer 30, which is far away from the PET substrate layer 10, and the anti-friction layer 40 covers the surfaces of the first resin coating 31 and the Microsoft particles 32 of the isolation layer 30.
The upper surface of the PET base material layer 10 is provided with a light diffusion layer 20, and the light diffusion layer 20 plays a role in light diffusion; an isolation layer 30 is arranged below the PET base material layer 10, and the isolation layer 30 mainly plays a role in spacing and prevents the friction-resistant light diffusion film from being attached to the PC to interfere with the PC.
And the surface of the isolation layer 30 is also provided with an anti-friction layer 40, the anti-friction layer 40 covers the surfaces of the first resin coating 31 and the microsoft particles 32 of the isolation layer 30, and the anti-friction layer 40 mainly reduces the surface friction coefficient of the light diffusion film, so that the surface of the light diffusion film is smoother, and the light guide plate is not easy to scratch. The microsoft particles 32 on the isolation layer 30 can be protected, and the microsoft particles 32 and the first resin coating 31 are prevented from falling off, so that the microsoft particles 32 on the surface of the friction-resistant light diffusion film isolation layer 30 are well protected.
The light diffusion layer 20 comprises a second resin coating 21 and a plurality of diffusion particles 22, the second resin coating 21 is fixed on the upper surface of the PET base material by adopting a coating mode, and the diffusion particles 22 are embedded in the surface of the second resin coating 21. The diffusion particles 22 are fixed by the second resin coating layer 21, so that the diffusion particles 22 are prevented from loosening, and the upper surface of the PET substrate layer 10 can be protected by the second resin coating layer 21.
In the scheme, the thickness of the PET substrate layer 10 is 38-100 μm, the thickness of the light diffusion layer 20 is 9-11 μm, the thickness of the isolation layer 30 is 8-10 μm, and the thickness of the anti-friction layer 40 is 1-2 um. People can select the PET substrate layer 10 with different thicknesses according to different backlight sources to carry out coating treatment, thereby forming optical diffusion films with different thicknesses, and the optical diffusion films are applied to different backlight sources, and the thicknesses of the light diffusion layer 20, the isolation layer 30 and the anti-friction layer 40 can be controlled, so that the phenomenon that the use is influenced due to the overlarge thickness of the anti-friction light diffusion film is avoided.
The microsoft particle 32 adopts the PBMA microsphere, and the PBMA microsphere has better elasticity, thereby having the anti-compression effect.
A preparation method of a friction-resistant light diffusion film comprises the following steps:
firstly, preparing a coating, namely preparing a light diffusion layer coating, an isolation layer coating and an anti-friction layer coating in advance; thereby facilitating subsequent multiple different coating treatments of the PET substrate layer.
And secondly, coating the light diffusion layer, namely coating the light diffusion layer paint prepared in the first step on the upper surface of the PET substrate layer.
And thirdly, drying the light diffusion layer, and drying the upper surface of the PET substrate layer coated in the second step to cure the light diffusion layer coating on the upper surface of the PET substrate layer. Thereby forming a light diffusion layer on the upper surface of the PET base material layer.
And fourthly, coating the isolation layer, and coating the isolation layer coating prepared in the first step on the lower surface of the PET substrate layer.
And fifthly, drying the isolation layer, and drying the lower surface of the PET substrate layer coated in the fourth step to cure the isolation layer coating on the lower surface of the PET substrate layer.
And sixthly, coating the anti-friction layer, namely coating the anti-friction layer coating prepared in the first step on the surface of the isolation layer formed by curing in the fifth step.
And seventhly, drying the anti-friction layer coating coated in the sixth step to form an anti-friction layer on the surface of the isolation layer, and protecting the isolation layer by using the anti-friction layer.
And eighthly, detecting the finished product dried in the seventh step to obtain the finished product meeting the detection requirement, namely the formed friction-resistant light diffusion film.
In the actual production and processing process, the sequential coating sequence of the upper surface and the lower surface of the PET substrate layer does not influence the final coating effect, and the sequential coating sequence can be adjusted according to the actual production requirement.
In addition, in the whole coating process, automatic coating equipment can be adopted for coating treatment, so that the coating efficiency is improved, the labor is reduced, and the product quality is improved.
Wherein the weight percentage of the raw materials of the light diffusion layer coating is 100 percent of hydroxyl acrylic resin, 20-25 percent of ethyl acetate, 10-20 percent of butyl acetate, 5-10 percent of PMMA, and 1-3 percent of curing agent. Mixing PMMA particles with a diluent, dispersing by using a high-speed dispersing machine, adding hydroxyl acrylic resin, continuously dispersing by using a high-speed dispersing agent, finally adding a curing agent, and dispersing by using the high-speed dispersing agent to finish the coating preparation process of the coating diffusion layer.
The light diffusion film has excellent light diffusion function, high optical brightness, good haze and light transmittance, high aging resistance and stable quality. The PMMA particles are mainly used for light diffusion, the acrylic resin is used for fixing the PMMA particles, and the diluent is mainly used for controlling the viscosity and the solid content.
The weight percentage of the raw materials of the isolating layer coating is that acrylic resin 100, ethyl acetate 40-50, PBMA particle resin 25-35 and curing agent 1-3, PBMA particles and diluent are dispersed by using a high-speed dispersion machine, then acrylic resin is added for continuous dispersion, finally the curing agent is added for continuous dispersion for 10 minutes, and the coating preparation process of the isolating layer is completed. The particles required by the isolation layer have certain elasticity, and the soft particle PBMA microspheres can be better elastically deformed by selecting the material of the particles, so that the light guide plate is prevented from being crushed.
The anti-friction layer coating comprises a main agent and a curing agent, wherein the mass percentage of the main agent to the curing agent is 8-10: 1; the main agent comprises the following components in percentage by weight: 55-60% of tetrafluoro resin, 1-3% of film forming additive, 25-32% of filler and 5-19% of solvent; the curing agent of (1) comprises: and (3) adding the tetrafluoro resin, the film-forming assistant, the filler and the solvent into the high-speed dispersion machine for dispersion, and then adding the curing agent into the high-speed dispersion machine for continuous dispersion for 10 minutes to finish the preparation process of the coating for coating the anti-friction layer.
And the tetrafluoro resin is vinyl tetrafluoro resin, and the fluororesin is a thermoplastic resin containing fluorine atoms in an edited molecular structure. Has the characteristics of excellent high and low temperature resistance, dielectric property, chemical stability, weather resistance, incombustibility, non-adhesiveness, low friction coefficient and the like. By utilizing the non-adhesiveness and the low friction coefficient of the fluororesin, the product is smoother as the friction coefficient is lower, and the PC board is not easy to scratch.
Above-mentioned drying process adopts many gradients drying process, including 6 sections stoving casees, adopts different temperatures to carry out many gradients drying process. The temperature range of the drying box is that the temperature of the drying box in section 1 is 40-60 ℃, the temperature of the drying box in section 2 is 60-90 ℃, the temperature of the drying box in section 3 is 70-90 ℃, the temperature of the drying box in section 4 is 90-110 ℃, the temperature of the drying box in section 5 is 70-90 ℃, and the temperature of the drying box in section 6 is 30-50 ℃. Thereby enabling better curing of different coatings.
The coated finished product is subjected to haze and light transmittance tests, hundred-grid adhesion tests, friction resistance tests, compression resistance tests, pencil hardness tests, aging resistance tests, environment RA tests, yellowing resistance tests and the like, and the finished product with good quality can be used or sold.
The following table shows the friction coefficient comparison after the friction resistant layer is adopted in the scheme:
| serial number | Isolation layer particle material | Coefficient of dynamic friction | Coefficient of static friction | Remarks for note |
| 1 | PMMA | 0.288 | 0.180 | Rubbing against PC board |
| 2 | PU | 0.293 | 0.193 | Rubbing against PC board |
| 3 | PA | 0.247 | 0.157 | Rubbing against PC board |
| 4 | This scheme | 0.153 | 0.102 | Rubbing against PC board |
Thereby reducing the friction coefficient of the light diffusion film and improving the friction resistance of the light diffusion film.
The invention provides a friction-resistant light diffusion film, wherein a light diffusion layer is arranged on the upper surface of a PET (polyethylene terephthalate) base material layer and plays a role in light diffusion, an isolation layer is arranged below the PET base material layer and mainly plays a role in spacing to prevent the friction-resistant light diffusion film from forming a pasting interference with PC (polycarbonate), an anti-friction layer is also arranged on the surface of the isolation layer and covers a first resin coating and the surfaces of Microsoft particles of the isolation layer, the anti-friction layer mainly reduces the surface friction coefficient of the light diffusion film, so that the surface of the light diffusion film is smoother, the light guide plate is not easily scratched, the Microsoft particles on the isolation layer can be protected, and the shedding between the Microsoft particles and the first resin coating is avoided, so that the Microsoft particles on the surface of the friction-resistant light diffusion film isolation layer are better protected.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a antifriction light diffusion membrane, its characterized in that, includes the PET substrate layer, PET substrate layer upper surface is equipped with the light diffusion layer, PET substrate layer lower surface is equipped with the isolation layer, the isolation layer includes first resin coating and a plurality of Microsoft particle, first resin coating adopts the coating mode to fix at PET substrate layer lower surface, Microsoft particle inlays in first resin coating surface, Microsoft particle makes isolation layer surface form unevenness's plane, PET substrate layer one side is kept away from to the isolation layer is equipped with the antifriction layer, the antifriction layer covers in the first resin coating and the Microsoft particle surface of isolation layer.
2. The abrasion-resistant light diffusion film according to claim 1, wherein the light diffusion layer comprises a second resin coating layer and a plurality of diffusion particles, the second resin coating layer is fixed on the upper surface of the PET base material by coating, and the diffusion particles are embedded in the surface of the second resin coating layer.
3. The abrasion-resistant light diffusion film according to claim 2, wherein the thickness of the PET base layer is 38 to 100 μm, the thickness of the light diffusion layer is 9 to 11 μm, the thickness of the spacer layer is 8 to 10 μm, and the thickness of the anti-friction layer is 1 to 2 μm.
4. The abrasion-resistant light diffusion film of claim 1, wherein the microsoft particles are PBMA microspheres.
5. The preparation method of the friction-resistant light diffusion film is characterized by comprising the following steps of:
s1, preparing a coating, namely preparing a light diffusion layer coating, an isolation layer coating and an anti-friction layer coating in advance;
s2, coating the light diffusion layer, namely coating the light diffusion layer paint prepared in the S1 on the upper surface of the PET base material layer;
s3, drying the light diffusion layer, and drying the upper surface of the PET substrate layer coated in the step S2 to cure the light diffusion layer coating on the upper surface of the PET substrate layer;
s4, coating the isolation layer, namely coating the prepared isolation layer coating of S1 on the lower surface of the PET substrate layer;
s5, drying the isolation layer, and drying the lower surface of the PET substrate layer coated in the step S4 to cure the isolation layer coating on the lower surface of the PET substrate layer;
s6, coating the anti-friction layer, namely coating the anti-friction layer coating prepared in the step S1 on the surface of the isolation layer formed by the step S5 in a curing mode;
s7, drying the anti-friction layer, and drying the anti-friction layer coating coated in the step S6 to form the anti-friction layer on the surface of the isolation layer;
s8, detecting the finished product after the drying of S7, and forming the anti-friction light diffusion film of the claims 1-4 after the finished product meets the detection requirements.
6. The method for preparing a friction-resistant light diffusion film according to claim 5, wherein the weight percentage of the raw materials of the light diffusion layer coating is 100 parts of hydroxyl acrylic resin, 20-25 parts of ethyl acetate, 10-20 parts of butyl acetate, 10-10 parts of PMMA5, 1-3 parts of curing agent;
mixing PMMA particles with a diluent, dispersing by using a high-speed dispersing machine, adding hydroxyl acrylic resin, continuously dispersing by using a high-speed dispersing agent, finally adding a curing agent, and dispersing by using the high-speed dispersing agent to finish the coating preparation process of the coating diffusion layer.
7. The method for preparing a friction-resistant light diffusion film according to claim 5, wherein the raw materials of the isolating layer coating comprise, by weight, 100% of acrylic resin, 40-50% of ethyl acetate, 25-35% of PBMA particle resin and 1-3% of a curing agent, the PBMA particles and the diluent are dispersed by using a high-speed dispersion machine, then the acrylic resin is added for continuous dispersion, and finally the curing agent is added for continuous dispersion for 10 minutes, thereby completing the coating preparation process of the isolating layer.
8. The preparation method of the friction-resistant light diffusion film according to claim 5, wherein the anti-friction layer coating comprises a main agent and a curing agent, and the mass percentage of the main agent to the curing agent is 8-10: 1; the main agent comprises the following components in percentage by weight: 55-60% of tetrafluoro resin, 1-3% of film forming additive, 25-32% of filler and 5-19% of solvent; the curing agent comprises: and (3) adding the tetrafluoro resin, the film-forming assistant, the filler and the solvent into the high-speed dispersion machine for dispersion, and then adding the curing agent into the high-speed dispersion machine for continuous dispersion for 10 minutes to finish the preparation process of the coating for coating the anti-friction layer.
9. The method of claim 5, wherein the tetrafluoro resin is a vinyl tetrafluoro resin.
10. The method for preparing a rubbing-resistant light diffusion film as claimed in claim 1, wherein the drying treatment is a multi-gradient drying treatment comprising 6 drying boxes, and the multi-gradient drying treatment is performed at different temperatures.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779378A (en) * | 2022-06-17 | 2022-07-22 | 宁波长阳科技股份有限公司 | Layered coating type scratch-resistant coating reflective film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114779378A (en) * | 2022-06-17 | 2022-07-22 | 宁波长阳科技股份有限公司 | Layered coating type scratch-resistant coating reflective film and preparation method thereof |
| CN114779378B (en) * | 2022-06-17 | 2022-09-09 | 宁波长阳科技股份有限公司 | Layered coating type scratch-resistant coating reflective film and preparation method thereof |
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