CN103345012A - Brightening diffusion film and preparation method thereof - Google Patents
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- CN103345012A CN103345012A CN2013103307695A CN201310330769A CN103345012A CN 103345012 A CN103345012 A CN 103345012A CN 2013103307695 A CN2013103307695 A CN 2013103307695A CN 201310330769 A CN201310330769 A CN 201310330769A CN 103345012 A CN103345012 A CN 103345012A
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Abstract
The invention relates to the technical field of optical films and in particular relates to a brightening diffusion film and a preparation method thereof. In order to solve the problems that the cost is high and the coating performance is poor because diffusion microbeads on the surface of a conventional diffusion film are large in particle size, the invention provides a brightening diffusion film and a preparation method thereof. The diffusion film comprises a transparent base material, wherein a diffusion layer is arranged on the upper surface of the transparent base material; a protective coating is arranged on the lower surface of the transparent base material; the diffusion layer comprises an adhesive and diffusion particles; the diffusion particles are adhered to the transparent base material through the adhesive; the diffusion particles include large diffusion particles and small diffusion particles; the diffusion particles form bulges on the surface of the diffusion layer; each bulge has the height of 10-200 microns. According to the provided brightening diffusion film, the positive brightness of a backlight module can be improved, and the diffusion film has the advantages of atomizing a light source and reducing the cost; moreover, the preparation method is simple in process and easy to operate.
Description
Technical field
The present invention relates to optical film technology field, relate in particular to a kind of brightened type diffusion barrier and preparation method thereof.
Background technology
Module backlight steps into high-speed development period along with the develop rapidly of digital product as one of key component of LCD.For constantly bringing forth new ideas of digital product, such as products such as mobile phone, panel computer, notebook computer, LCD TV are more and more higher to its brightness, requirements of saving energy, and this is for module backlight, and this just need improve brightness on the basis that does not increase the lamp source.
The main effect of module backlight is for display provides evenly, area source efficiently, and diffusion barrier is as one of important composition of module backlight, and main effect is diffusion light, atomizing light source, raising brightness, and generally each module backlight needs 2-5 sheet diffusion barrier.When the brightness of diffusion barrier was improved, the overall brightness of module backlight had also obtained increasing considerably.
The preparation method of general diffusion barrier is at transparent base coating adhesive and diffusion microballon, each diffusion microballon forms projection not of uniform size one by one on the diffusion barrier surface, light by these by single diffusion microballon form protruding the time, reflect, improved front face brightness.When diffusion microballon particle diameter was more big, the brightness of diffusion barrier was more high, yet the cost of big diffusion microballon is also more high, and in coating process, face is easy to generate scratch, the situation of crawling.
Summary of the invention
For the particle diameter of the diffusion microballon that solves existing diffusion barrier surface bigger, cause the high and relatively poor problem of coating performance of cost, the invention provides a kind of brightened type diffusion barrier and preparation method thereof, brightened type diffusion barrier provided by the invention can improve the front face brightness of module backlight, and have atomizing light source, the advantage that reduces cost, and, its preparation method technology is simple, easy operating.
In order to reach above-mentioned technical purpose, the invention provides following technical scheme:
The invention provides a kind of brightened type diffusion barrier; described diffusion barrier comprises transparent base; described transparent base upper surface is provided with diffusion layer; lower surface is provided with protective finish; described diffusion layer comprises adhesive and diffusion particle; described diffusion particle coheres on described transparent base by adhesive, makes diffusion particle form projection on the diffusion layer surface, and the height of described projection is 10-200 μ m.
Further, described each projection comprises a plurality of big diffusion particles.Further, described each projection comprises at least 3 big diffusion particles.Further, described each projection comprises at least 5 big diffusion particles.
Further, described diffusion layer comprises the adhesive of 100 weight portions, the big diffusion particle of 50-150 weight portion and the little diffusion particle of 10-60 weight portion.Described big diffusion particle refers to that particle diameter is more than or equal to the diffusion particle of 10 μ m.Described little diffusion particle refers to that particle diameter is less than the diffusion particle of 10 μ m.The particle diameter of described big diffusion particle is 10-40 μ m, 10-15 μ m, 20-25 μ m or 30 μ m.The particle diameter of described little diffusion particle is 0.1-9 μ m, 0.5 μ m, 1 μ m, 2-3 μ m or 7-8 μ m.
Described diffusion particle is selected from the combination of a kind of in polymethylmethacrylate, poly-n-butyl methacrylate, polystyrene, polyorganosiloxane resin, titania, calcium carbonate, barium sulphate, the silicon dioxide granule or at least two kinds; Described adhesive is selected one or both the potpourri in the agent of acrylic acid gluing, adhesive for polyurethane, the agent of epoxy resin gluing for use.
Above-mentioned brightened type diffusion barrier is Chemical composition that, and wherein, the principal element that influences brightness comprises adhesive in the diffusion layer and the material of diffusion particle, refractive index; The addition of big diffusion particle, the particle diameter of big diffusion particle, the addition of little diffusion particle, the height of projection, the material of transparent base, thickness.In general, the particle diameter of big diffusion particle is more big, and brightness is more good, and height of projection is more high, and brightness is more good.When but the height of projection is too big, can make film thick, be unsuitable for the thickness requirement of ultra-thin assembly.
Further, the height of described projection is 25-150 μ m.
Further, the height of described projection is 150-200 μ m.
Further, described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 0.1-5 weight portion.Described adhesive is selected from one or both the combination in the agent of acrylic acid gluing, adhesive for polyurethane, the agent of epoxy resin gluing.The described anti-stick particle that connects is organic filler, and described organic filler is selected from the combination of a kind of in polymethylmethacrylate, poly-n-butyl methacrylate, polystyrene, the polyorganosiloxane resin or at least two kinds.
Further, described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 1-5 weight portion.Further, described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 1-3 weight portion.Further, described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 3-5 weight portion.The described anti-stick particle that connects is selected from polymethylmethacrylate or polystyrene.
Further, described transparent base is selected from a kind of in polycarbonate (PC), polyethylene terephthalate (PET), polyamide (PA), polystyrene (PS), tygon (PE), the polymethylmethacrylate (PMMA).Described transparent base refractive index is 1.4-1.75.
Further, the thickness of described transparent base is 10-300 μ m.Preferably, the thickness of described transparent base is 15-25 μ m, 35-50 μ m, 60-80 μ m, 95-150 μ m or 170-250 μ m.Preferably, the thickness of described transparent base is 50-150 μ m.
Further, described transparent base is selected from a kind of in polyamide (PA), polycarbonate (PC), tygon (PE), polyethylene terephthalate (PET) or the polymethylmethacrylate (PMMA); Described diffusion particle is selected from the combination of a kind of in polymethylmethacrylate, poly-n-butyl methacrylate, polystyrene, the calcium carbonate particle or at least two kinds; Described adhesive is selected one or both the potpourri in the agent of acrylic acid gluing, adhesive for polyurethane, the agent of epoxy resin gluing for use; The thickness of described transparent base is 50-150 μ m; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 80-120 weight portion and the little diffusion particle of 20-50 weight portion, the particle diameter of described big diffusion particle are 15-25 μ m, and the particle diameter of described little diffusion particle is 1-9 μ m; The height of described projection is 25-200 μ m.
Further, described transparent base is selected from polyamide (PA) or polyethylene terephthalate (PET); Described diffusion particle is selected from the combination of a kind of in polymethylmethacrylate, polystyrene, the calcium carbonate or at least two kinds; Described adhesive is selected from adhesive for polyurethane or the agent of epoxy resin gluing; Described anti-stick even particle is polystyrene; The thickness of described transparent base is 50-150 μ m; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 100-120 weight portion and the little diffusion particle of 20-30 weight portion, the particle diameter of described big diffusion particle are 15-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 100-200 μ m.
Further, described transparent base is polyethylene terephthalate (PET), and described adhesive is adhesive for polyurethane, and described big diffusion particle is polymethylmethacrylate, and described little diffusion particle is calcium carbonate, and described anti-stick even particle is polystyrene; The thickness of described transparent base is 50-150 μ m; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 120 weight portions and the little diffusion particle of 20 weight portions, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 150-200 μ m.
The present invention also provides the preparation method of above-mentioned brightened type diffusion barrier, and described preparation method comprises the steps:
(1) preparation diffusion layer coating fluid: in adhesive, add diffusion particle, stir, add solvent, allotment coating fluid viscosity;
(2) coating diffusion layer: the coating fluid of step (1) gained is coated on the transparent base, and with applicator roll the coating fluid coating is opened, coated film needs aging 0.5-3h in 60-120 ℃ baking oven;
(3) preparation protective finish coating fluid: in adhesive, add the anti-stick particle that connects, stir, add solvent, allotment coating fluid viscosity;
(4) coating protective seam: the protective finish coating fluid is coated on the lower surface of film, and the 0.5-3h that in 60-120 ℃ baking oven, wears out.
In above-mentioned steps (1) and step (3), add an amount of solvent adjustment coating fluid degree of being stained with, the viscosity of coating fluid is convenient to coating process with coating fluid and is advisable.
Further, in above-mentioned steps (2), described applicator roll surface is provided with rough decorative pattern, makes the diffusion barrier surface form projection.The height of described projection is more than or equal to the particle diameter of big diffusion particle.Preferably, the height of described projection is greater than the particle diameter of big diffusion particle.
Further, in above-mentioned steps (2), 0.5-3h preferably wears out in 80 ℃ baking oven.
Further, in above-mentioned steps (4), 0.5-3h preferably wears out in 80 ℃ baking oven.
The big or small stochastic distribution of above-mentioned projection, these convex to form lenticule one by one, have good spotlight effect, and this structure has significant gain effect to brightness.
The brightening effect of diffusion barrier of the prior art is the microballon (being diffusion particle) in the diffusion layer, and these microballons itself independently form projection one by one on diffusion layer surface, has the effect of optically focused, and when the particle diameter of microballon was more big, spotlight effect was more good.But big microballon cost height, and in coating process, be difficult for coating evenly, easily cause bad phenomenon such as face scratch.
Compared with prior art, brightened type diffusion barrier provided by the invention adopts the less big diffusion particle of particle diameter, and by the surperficial rough decorative pattern that arranges of applicator roll, make diffusion barrier face formation projection one by one, comprise a plurality of big diffusion particles in each projection, like this, namely can increase brightness effectively, do not increase simultaneously cost, and be easy to carry out coating process, make its preparation method technology simple, easy operating.
Description of drawings
Fig. 1 is the structural representation of brightened type diffusion barrier provided by the invention.
Wherein, 101 is diffusion layer, and 102 is transparent base, and 103 is protective finish, and 104 is projection, and 1011 is big diffusion particle, and 1012 is little diffusion particle.
Embodiment
As shown in Figure 1; brightened type diffusion barrier provided by the invention comprises transparent base 102; described transparent base 102 upper surfaces are provided with diffusion layer 101; lower surface is provided with protective finish 103; described diffusion layer 101 comprises adhesive and diffusion particle; described diffusion particle coheres on described transparent base by adhesive, and described diffusion particle comprises big diffusion particle 1011 and little diffusion particle 1012, and described diffusion particle forms projection 104 on diffusion layer 101 surfaces.
Test the optical property of diffusion barrier provided by the invention in the following manner.
Mist degree test: get the diffusion barrier sheet to be measured of an A4 size, put into the mist degree tester and record its mist degree, light transmittance values.
Luminance test: get the diffusion barrier sheet to be measured of an A4 size, put into module backlight according to test structure, under the voltage of 24V, light, test its brightness with the briliancy instrument.
Embodiment 1
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, transparent base is PET, contain in the diffusion layer: 100 parts by weight of acrylic adhesives, the particle diameter of 80 weight portions is the big diffusion particle of 15 μ m, the particle diameter of 30 weight portions is the little diffusion particle of 5 μ m, and described big diffusion particle and little diffusion particle are the PMMA material.Described diffusion layer surface has formed the projection of 15-100 μ m, and described base material lower surface is provided with protective finish.
Embodiment 2
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, transparent base is PET, contain in the diffusion layer: the adhesive for polyurethane of 100 weight portions, the particle diameter of 100 weight portions is the big diffusion particle of 20 μ m, the particle diameter of 20 parts by weight is the little diffusion particle of 5 μ m, and described big diffusion particle and little diffusion particle are the PMMA material.Described diffusion layer surface has formed the projection of 25 μ m-150 μ m.Described base material lower surface is provided with protective finish.
Embodiment 3
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, transparent base is PC, contain in the diffusion layer: the adhesive for polyurethane of 100 weight portions, the particle diameter of 120 weight portions is the big diffusion particle of 20-25 μ m, the particle diameter of 50 parts by weight is the little diffusion particle of 1-3 μ m, and the material of described big diffusion particle and little diffusion particle is PS.Described diffusion layer surface has formed the projection of 20-80 μ m.Described base material lower surface is provided with protective finish.
Embodiment 4
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, transparent base is PET, and the thickness of transparent base is 10 μ m; Contain in the diffusion layer: 100 parts by weight of acrylic adhesives, the big diffusion particle of 50 weight portions and the little diffusion particle of 10 weight portions, the particle diameter of described big diffusion particle is 10 μ m, and described little diffusion particle particle diameter is 0.1-1 μ m, and described big diffusion particle and little diffusion particle are the PMMA material.Described diffusion particle has formed the projection of 10-50 μ m on the diffusion layer surface.Described base material lower surface is provided with protective finish, and described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 0.1 weight portion.Described anti-stick even particle is polymethylmethacrylate.
Embodiment 5
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, transparent base is PA, and the thickness of transparent base is 300 μ m; Contain in the diffusion layer: the adhesive for polyurethane of 100 weight portions, the big diffusion particle of 150 weight portions and the little diffusion particle of 60 weight portions, the particle diameter of described big diffusion particle is 35-40 μ m, described little diffusion particle particle diameter is 7-9 μ m, described big diffusion particle is polystyrene particle, and described little diffusion particle is the PMMA material.Described diffusion particle has formed the projection of 150-200 μ m on the diffusion layer surface.Described base material lower surface is provided with protective finish, and described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 5 weight portions.Described anti-stick even particle is polystyrene particle.
Embodiment 6
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, transparent base is PC, and the thickness of transparent base is 150 μ m; Contain in the diffusion layer: 100 parts by weight of epoxy resin adhesives, the big diffusion particle of 100 weight portions and the little diffusion particle of 35 weight portions, the particle diameter of described big diffusion particle is 20-25 μ m, described little diffusion particle particle diameter is 5-7 μ m, described big diffusion particle is polystyrene particle, and described little diffusion particle is the barium sulphate particle.Described diffusion particle has formed the projection of 80-120 μ m on the diffusion layer surface.Described base material lower surface is provided with protective finish, and described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 3 weight portions.Described anti-stick even particle is polyorganosiloxane resin.
Embodiment 7
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is polyethylene terephthalate; The thickness of transparent base is 50 μ m; Described big diffusion particle is poly-n-butyl methacrylate; Described little diffusion particle is the barium sulphate particle; Described adhesive is the agent of acrylic acid gluing; Described anti-stick even particle is polymethylmethacrylate; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 80 weight portions and the little diffusion particle of 20 weight portions, the particle diameter of described big diffusion particle are 15-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 25-70 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 1 weight portion.
Embodiment 8
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is tygon; The thickness of transparent base is 150 μ m; Described big diffusion particle is polystyrene; Described little diffusion particle is calcium carbonate; Described adhesive is the agent of epoxy resin gluing; Described anti-stick even particle is polystyrene; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 120 weight portions and the little diffusion particle of 50 weight portions, the particle diameter of described big diffusion particle are 15-25 μ m, and the particle diameter of described little diffusion particle is 7-9 μ m; The height of described projection is 100-200 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 3 weight portions.
Embodiment 9
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is polymethylmethacrylate; The thickness of described transparent base is 100 μ m; Described big diffusion particle is polymethylmethacrylate; Described little diffusion particle is calcium carbonate; Described adhesive is adhesive for polyurethane; Described anti-stick even particle is polystyrene; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 100 weight portions and the little diffusion particle of 35 weight portions, the particle diameter of described big diffusion particle are 15-25 μ m, and the particle diameter of described little diffusion particle is 5-6 μ m; The height of described projection is 80-120 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 5 weight portions.
Embodiment 10
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is polyamide; The thickness of described transparent base is 100 μ m; Described big diffusion particle is polystyrene; Described little diffusion particle is calcium carbonate; Described adhesive is adhesive for polyurethane; Described anti-stick even particle is polystyrene; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 110 weight portions and the little diffusion particle of 25 weight portions, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 100-200 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 3 weight portions.
Embodiment 11
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is polyamide; The thickness of described transparent base is 60 μ m; Described big diffusion particle is polymethylmethacrylate; Described little diffusion particle is calcium carbonate; Described adhesive is adhesive for polyurethane; Described anti-stick even particle is polystyrene; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 100 weight portions and the little diffusion particle of 20 weight portions, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 100-200 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 1 weight portion.
Embodiment 12
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is polyethylene terephthalate; The thickness of described transparent base is 120 μ m; Described big diffusion particle is polystyrene; Described little diffusion particle is polymethylmethacrylate; Described adhesive is the agent of epoxy resin gluing; Described anti-stick even particle is polystyrene; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 120 weight portions and the little diffusion particle of 30 weight portions, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 100-200 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 5 weight portions.
Embodiment 13
Prepare brightened type diffusion barrier provided by the invention according to the method described above, wherein, described transparent base is polyethylene terephthalate, and the thickness of described transparent base is 100 μ m; Described adhesive is adhesive for polyurethane, and described big diffusion particle is polymethylmethacrylate, and described little diffusion particle is calcium carbonate, and described anti-stick even particle is polystyrene; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 120 weight portions and the little diffusion particle of 20 weight portions, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 150-200 μ m.Described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 3 weight portions.
Comparative Examples 1:
It is PET that this Comparative Examples is selected transparent base for use, and the thickness of transparent base is 100 μ m.Contain in the diffusion layer: 100 parts by weight of acrylic adhesives, the particle diameter of 80 weight portions are the big diffusion particle of 15 μ m, and the particle diameter of 30 weight portions is the little diffusion particle of 5 μ m, and described big diffusion particle and little diffusion particle are the PMMA material.Described diffusion layer upper surface does not have the projection that is higher than big diffusion particle particle diameter.Described base material lower surface is provided with protective finish.
Table 1: the optical performance test data of the diffusion barrier that the brightened type diffusion barrier that the embodiment of the invention provides and Comparative Examples provide
| ? | Mist degree | Transmittance | Brightness (cd/m 2） |
| Embodiment 1 | 89.12% | 90.63% | 2812 |
| Embodiment 2 | 91.31% | 89.91% | 2964 |
| Embodiment 3 | 92.33% | 90.73% | 2763 |
| Embodiment 4 | 88.12% | 91.63% | 2712 |
| Embodiment 5 | 93.31% | 89.91% | 2864 |
| Embodiment 6 | 92.33% | 91.73% | 2963 |
| Embodiment 7 | 90.12% | 92.63% | 2912 |
| Embodiment 8 | 91.31% | 90.71% | 2964 |
| Embodiment 9 | 92.33% | 90.93% | 2950 |
| Embodiment 10 | 92.83% | 92.73% | 3107 |
| Embodiment 11 | 93.33% | 91.63% | 3098 |
| Embodiment 12 | 92.93% | 92.02% | 3120 |
| Embodiment 13 | 94.33% | 94.53% | 3206 |
| Comparative Examples 1 | 89.21% | 89.42% | 1872 |
Can be drawn by data shown in the table 1, brightened type diffusion barrier provided by the invention can improve the front face brightness of module backlight, and has mist degree and transmittance preferably.Wherein, the brightened type diffusion barrier that embodiment 10-13 provides can better improve the front face brightness of module backlight, and has mist degree and transmittance preferably.Especially, the brightened type diffusion barrier that embodiment 13 provides can better improve the front face brightness of module backlight, and has better mist degree and transmittance.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and all is encompassed in the claim of the present invention.
Claims (10)
1. brightened type diffusion barrier; it is characterized in that; described diffusion barrier comprises transparent base; described transparent base upper surface is provided with diffusion layer, and lower surface is provided with protective finish, and described diffusion layer comprises adhesive and diffusion particle; described diffusion particle coheres on transparent base by adhesive; described diffusion particle comprises big diffusion particle and little diffusion particle, and described diffusion particle forms projection on the diffusion layer surface, and the height of described projection is 10-200 μ m.
2. brightened type diffusion barrier according to claim 1 is characterized in that, described diffusion layer comprises the adhesive of 100 weight portions, the big diffusion particle of 50-150 weight portion and the little diffusion particle of 10-60 weight portion.
3. brightened type diffusion barrier according to claim 2 is characterized in that, the height of described projection is 25-150 μ m.
4. brightened type diffusion barrier according to claim 2 is characterized in that, the height of described projection is 150-200 μ m.
5. brightened type diffusion barrier according to claim 1 is characterized in that, described protective finish comprises the adhesive of 100 weight portions and the anti-stick particle that connects of 0.1-5 weight portion.
6. brightened type diffusion barrier according to claim 1 is characterized in that, described transparent base is selected from a kind of in polyamide, polycarbonate, tygon, polyethylene terephthalate or the polymethylmethacrylate; Described diffusion particle is selected from the combination of a kind of in polymethylmethacrylate, poly-n-butyl methacrylate, polystyrene, calcium carbonate, the barium sulphate particle or at least two kinds; Described adhesive is selected one or both the potpourri in the agent of acrylic acid gluing, adhesive for polyurethane, the agent of epoxy resin gluing for use; The thickness of described transparent base is 50-150 μ m; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 80-120 weight portion and the little diffusion particle of 20-50 weight portion, the particle diameter of described big diffusion particle are 15-25 μ m, and the particle diameter of described little diffusion particle is 1-9 μ m; The height of described projection is 25-200 μ m.
7. brightened type diffusion barrier according to claim 1 is characterized in that, described transparent base is selected from polyamide or polyethylene terephthalate; Described diffusion particle is selected from the combination of a kind of in polymethylmethacrylate, polystyrene, the calcium carbonate or at least two kinds; Described adhesive is selected from adhesive for polyurethane or the agent of epoxy resin gluing; Described anti-stick even particle is polystyrene; The thickness of brown transparent base be 50-150 μ m; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 100-120 weight portion and the little diffusion particle of 20-30 weight portion, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 100-200 μ m.
8. brightened type diffusion barrier according to claim 1, it is characterized in that, described transparent base is polyethylene terephthalate, described adhesive is adhesive for polyurethane, described big diffusion particle is polymethylmethacrylate, described little diffusion particle is calcium carbonate, and described anti-stick even particle is polystyrene; The thickness of described transparent base is 50-150 μ m; Described diffusion layer comprises the adhesive of 100 weight portions, and the big diffusion particle of 120 weight portions and the little diffusion particle of 20 weight portions, the particle diameter of described big diffusion particle are 20-25 μ m, and the particle diameter of described little diffusion particle is 1-5 μ m; The height of described projection is 150-200 μ m.
9. according to the preparation method of the described brightened type diffusion barrier of one of claim 1-8, it is characterized in that described preparation method comprises the steps:
(1) preparation diffusion layer coating fluid: in adhesive, add diffusion particle, stir, add solvent, allotment coating fluid viscosity;
(2) coating diffusion layer: the coating fluid of step (1) gained is coated on the transparent base, and with applicator roll the coating fluid coating is opened, coated film needs aging 0.5-3h in 60-120 ℃ baking oven;
(3) preparation protective finish coating fluid: in adhesive, add the anti-stick particle that connects, stir, add solvent, allotment coating fluid viscosity;
(4) coating protective seam: the protective finish coating fluid is coated on the lower surface of film, and the 0.5-3h that in 60-120 ℃ baking oven, wears out.
10. the preparation method of brightened type diffusion barrier according to claim 9 is characterized in that, in step (2), described applicator roll surface is provided with rough decorative pattern, makes the diffusion barrier surface form projection.
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| CN107976730A (en) * | 2016-10-21 | 2018-05-01 | 苏州今道创业投资有限公司 | A kind of diffusion barrier |
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