CN109116451A - A kind of diffusion barrier and preparation method - Google Patents
A kind of diffusion barrier and preparation method Download PDFInfo
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- CN109116451A CN109116451A CN201811121794.1A CN201811121794A CN109116451A CN 109116451 A CN109116451 A CN 109116451A CN 201811121794 A CN201811121794 A CN 201811121794A CN 109116451 A CN109116451 A CN 109116451A
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- diffusion layer
- diffusion
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- diffusion barrier
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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
- G02B5/0221—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 the surface having an irregular structure
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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
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The present invention provides a kind of diffusion barriers and preparation method thereof, and wherein diffusion barrier includes substrate and is located at the positive positive diffusion layer of substrate, and the positive diffusion layer is realized by mold, and the meat thickness of the positive diffusion layer is 3-10um.It applies the technical scheme of the present invention, the diffusion layer with roughness, the diffusion layer of relative diffusion particle mode is prepared by using the mode of mold, more stable, anti-falling sphere performance is more preferable, thick by control meat, the cushion performance of diffusion layer is increased, that is, further improves anti-falling sphere ability.
Description
Technical field
The present invention relates to optical film fields, in particular to a kind of diffusion barrier and preparation method thereof.
Background technique
Display technology includes LCD technology, OLED technology, QD technology etc. at present, OLED and QD technology belongs to emerging skill
Art, accounts for that market ratio is smaller, and mainstream technology is still LCD technology.In LCD technology, the critical component of display is backlight module, back
Optical mode group is generally made of reflecting piece, light guide plate, diffusion barrier, prismatic lens etc..Diffusion barrier is important component, and main effect is
Point light source is become into area source.Diffusion barrier has large effect for the luminance of mould group entirety.In the mould group of small size, terminal
It is higher to the anti-falling sphere performance requirement of diaphragm.
The manufacturing process of diffusion barrier is as follows at present: diffusion particle, mist degree model are coated in the PET base material of different-thickness range
It encloses for 60-99%, the diffusion particle of low particle density is then coated in another side, mist degree range is generally less than 10%, examines simultaneously
Consider the friction condition of same light guide plate or polaroid, and the antistatic property that should have, in formula, joined different
Auxiliary agent.The mist degree range of the diffusion barrier prepared through the above steps is between 65-99%.
But there is anti-falling sphere ability difference in diffusion barrier prepared by such mode.
In addition, the diffusion barrier of diffusion particle coating method preparation, the risk for thering is particle to fall off in use.
Summary of the invention
The main purpose of the present invention is to provide a kind of diffusion barriers and preparation method thereof, to solve asking for anti-falling sphere performance difference
Topic.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of diffusion barrier, the diffusion barrier include
Substrate and it is located at the positive positive diffusion layer of substrate, by mold realization, the meat thickness of the positive diffusion layer is the positive diffusion layer
3-10um。
Preferably, the diffusion barrier include substrate and be located at substrate front and back sides positive diffusion layer and back diffusion layer,
The back diffusion layer realizes that the roughness Ra of the positive diffusion layer is not less than 35um, described to carry on the back the coarse of diffusion layer by mold
It spends Ra and is not less than 3um.
Preferably, the refractive index of glue used in the diffusion layer is 1.42-1.53.
Preferably, the viscosity of glue used in the diffusion layer is 5000-15000cPa.s.
Preferably, glue used in the diffusion layer includes: trifunctional polyurethane acroleic acid oligomer 30-50%, adjacent phenyl
Phenol epoxy acrylate 20-30%, phenoxyethyl acrylate 30-40% and initiator 2-5%.
Preferably, the substrate is any one of PET, PP, TAC.
Preferably, the substrate with a thickness of 50-250um.
Another aspect of the present invention additionally provides a kind of preparation method of diffusion barrier, which comprises substrate at least
Upper on one side to form diffusion layer by mold, the meat thickness of the diffusion layer is 5-10um.
Preferably, which comprises formed respectively in the front and back sides of the substrate by front master mold and back side master mold
Positive diffusion layer and back diffusion layer, the roughness of the front master mold are not less than 35um, and the roughness of the back side master mold is not less than
3um。
Preferably, which comprises the refractive index of glue used in the diffusion layer is 1.42-1.53.
It applies the technical scheme of the present invention, the diffusion layer with roughness is prepared by using the mode of mold, it is opposite to expand
The diffusion layer of shot submode, more stable, anti-falling sphere performance is more preferable, thick by control meat, increases the cushion performance of diffusion layer,
Further improve anti-falling sphere ability.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of diffusion barrier according to the present invention.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
It should be understood that when element (such as layer, film, region or substrate) is described as at another element "upper", this yuan
Part can be directly on another element, or intermediary element also may be present.Moreover, in specification and claims, when
When description has element " connected " to another element, which " can be directly connected to " to another element, or pass through third element
" electrical connection " is to another element.
Currently, generally believing that the influence factor of anti-falling sphere performance is glue type, the particle kind of diffusion barrier, particle/glue
Water ratio and particle by the level of coverage etc. of glue, even if but these combined factors are adjusted sometimes, product is also not achieved anti-
The requirement of falling sphere performance.Thus the present invention provides a kind of new diffusion barrier, it is molded and forms diffusion layer meat thickness
To improve the anti-falling sphere performance of product.
As shown in Figure 1, the present invention provides a kind of diffusion barrier, the diffusion barrier includes substrate 11 and is located at substrate front
Positive diffusion layer, the positive diffusion layer realizes that the meat thickness of the positive diffusion layer is 3-10um by mold.What mould profile was formed
Diffusion barrier, diffusion layer are rough surface random structure, similar diffusion particle effect, and particle will not occur and fall off thing
Part, the performances such as anti-falling sphere are more stable.Further, it is thick to form diffusion layer meat.Diffusion layer meat thickness is that substrate is tied at random with diffusion layer
Levelling blanket thickness between structure, it is usually identical as diffusion layer random structure, and be integrally formed, such as it is subsequent mention pass through control
The mode of press roller processed makes the glue of segment thickness form diffusion layer random structure, and the glue of remainder thickness forms meat
It is thick.The formation of meat thickness increases cushion performance when small ball impact, improves anti-falling sphere performance.
In a preferred embodiment, diffusion barrier includes substrate 11 and the positive diffusion layer 12 for being located at substrate front and back sides and back
The roughness of diffusion layer 13, the positive diffusion layer is not less than 35um, is preferably not less than 38um, the roughness of the back diffusion layer
Not less than 3um.Pass through
The meat thickness of wherein at least positive diffusion layer 12 is 3-10um (14 are expressed as in figure), preferably 5um.More optimal solution
In, positive diffusion layer 12 and back diffusion layer 13 all have meat thickness to further increase anti-falling sphere performance.Back diffusion layer meat thickness is 1-
3um.
Guarantee that anti-falling sphere performance and product luminance, the refractive index of glue used in the diffusion layer are 1.42-1.53 to be comprehensive,
UV energy 300-500mJ/cm2.
In preferred embodiment, the viscosity of glue used in diffusion layer is 5000-15000cPa.s, ensure that product itself has
Higher resilience.On this basis, thick in conjunction with diffusion layer meat, substantially increase the anti-falling sphere performance of product.
In the preferred embodiment of the present invention, glue used in diffusion layer includes: trifunctional polyurethane acroleic acid oligomer 30-
48%, o-phenyl phenol epoxy acrylate 20-30%, phenoxyethyl acrylate 30-40% and initiator 2-5%.
In above-described embodiment, substrate can be optical grade thin polymer film, such as any one of PET, PP, TAC.Substrate
With a thickness of 50-250 μm.
Another aspect of the present invention additionally provides a kind of preparation method of diffusion barrier, which comprises substrate just on
It is formed by mold and just dissipates layer, the meat thickness for just dissipating layer is 3-10um.
To further increase optics and anti-falling sphere performance, can respectively in the front and back sides of the substrate by front master mold and
Back side master mold forms positive diffusion layer and back diffusion layer, and the roughness of the front master mold is not less than 35um, the back side master mold
Roughness is not less than 3um.Wherein at least positive diffusion layer has meat thickness, preferably 3-10um.In more optimal solution, positive diffusion layer and
Back diffusion layer all has meat thickness to further increase anti-falling sphere performance.
The overmolded technique for forming positive diffusion layer especially by mold is as follows: master mold is placed in structure wheel, it, will by glue groove
The glue of height rebound is transferred to positive diffusion master mold, and the PET of certain thickness such as 25-50um is at a predetermined velocity such as the speed of 5-15m/min
Degree, under the action of press roller, by the shape transfer of master mold, obtains negative engraved film, and after UV lamp, by stripper roll, winding is obtained
The product of positive diffusion layer is had after to overmolded.The distance between press roller and mold are adjusted, the meat that can form predetermined thickness is thick.
The overmolded technique for forming back diffusion layer especially by mold is as follows:: master mold is placed in structure wheel, by glue groove,
The glue of height rebound is transferred to back diffusion master mold, the product with positive diffusion layer with the speed of certain speed such as 5-15m/min,
Under the action of press roller, by the shape transfer of master mold, negative engraved film is obtained, after UV lamp, by stripper roll, winding is obtained
Finished product.For press roller by controlling its dynamics, the meat that can form predetermined thickness is thick.
The following is an embodiment of the present invention and comparative example, to illustrate the effect of the present invention:
Embodiment 1:
Glue formula used in diffusion layer is as follows:
Polyurethane (methyl) acrylate of 25% weight, 30% weight bisphenol type epoxy (methyl) acrylate, 20%
Phenoxy group polyethylene glycol (methyl) acrylate, 20% weight bisphenol-A polyethoxy glycol, two (methyl) acrylate of weight
And 5% weight initiator.
The technique of positive overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, by the glue of refractive index 1.42
It is transferred to diffusion master mold, the PET of 50um is with the speed of 10min, and under the action of press roller, the shape transfer of master mold obtains
Negative engraved film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Front roughness Ra is 40um, meat thickness 3um.
The technique of back side overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, by the glue of refractive index 1.49
It is transferred to diffusion master mold, the PET after positive overmolded is with the speed of 10in, under the action of press roller, by the shape transfer of master mold,
Negative engraved film is obtained, after UV lamp, by stripper roll, winding obtains product after overmolded.
Back side Ra is 4um, meat thickness 1um.
Embodiment 2:
Glue formula used in diffusion layer is as follows:
Polyurethane (methyl) acrylate of 25% weight, 30% weight bisphenol type epoxy (methyl) acrylate, 20%
Phenoxy group polyethylene glycol (methyl) acrylate, 20% weight bisphenol-A polyethoxy glycol, two (methyl) acrylate of weight
And 5% weight initiator.
The technique of overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, the glue of refractive index 1.42 is shifted
To diffusion master mold, the PET of 50um is with the speed of 10min, under the action of press roller, by the shape transfer of master mold, obtains negative quarter
Film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Positive Ra is 60um, meat thickness 3um.
The technique of back side overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, by the glue of refractive index 1.49
It is transferred to diffusion master mold, the PET of 50um is with the speed of 10min, and under the action of press roller, the shape transfer of master mold obtains
Negative engraved film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Back side Ra is 4um, meat thickness 1um.
Embodiment 3:
Glue formula used in diffusion layer is as follows:
Polyurethane (methyl) acrylate of 25% weight, 30% weight bisphenol type epoxy (methyl) acrylate, 20%
Phenoxy group polyethylene glycol (methyl) acrylate, 20% weight bisphenol-A polyethoxy glycol, two (methyl) acrylate of weight
And 5% weight initiator.
The technique of overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, the glue of refractive index 1.42 is shifted
To diffusion master mold, the PET of 50um is with the speed of 10min, under the action of press roller, by the shape transfer of master mold, obtains negative quarter
Film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Positive Ra is 40um, meat thickness 6um.
The technique of back side overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, by the glue of refractive index 1.49
It is transferred to diffusion master mold, the PET of 50um under the action of press roller, by the shape transfer of master mold, obtains yin with the speed of 10min
Engraved film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Back side Ra is 4um, meat thickness 1um.
Embodiment 4
Glue formula used in diffusion layer is as follows:
Trifunctional polyurethane acroleic acid oligomer 40%, o-phenyl phenol epoxy acrylate 25%, acrylic acid phenoxy group
Ethyl ester 31% and initiator 4%.
The technique of overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, the glue of refractive index 1.42 is shifted
To diffusion master mold, the PET of 50um is with the speed of 10min, under the action of press roller, by the shape transfer of master mold, obtains negative quarter
Film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Positive Ra is 40um, meat thickness 6um.
The technique of back side overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, by the glue of refractive index 1.49
It is transferred to diffusion master mold, the PET of 50um under the action of press roller, by the shape transfer of master mold, obtains yin with the speed of 10min
Engraved film, after UV lamp, by stripper roll, winding obtains product after overmolded.
Back side Ra is 4um, meat thickness 1um.
Comparative example 1:
The comparison diffusion barrier face-coating is made of following component:
Ethyl acetate: 20.8 mass parts；Butyl acetate: 24.5 mass parts；It is acrylic resin modified: 20.7 mass parts；Expand
Powder: 17.3 mass parts；Additive: 0.03 mass parts；Curing agent: 1.4 mass parts.
The diffusion barrier back coating is made of following component:
Ethyl acetate: 45 mass parts；It is acrylic resin modified: 45 mass parts；Diffusant: 4 mass parts；Additive: 1 mass
Part；Curing agent: 5 mass parts.
It is positive to apply using 50umPET as substrate, it is dry by baking oven with the speed of 30m/min using gravure roll coating method
Dry solvent, winding.
Backsize uses the positive painting semi-finished product of previous step, and using gravure roll coating method, 35m/min speed is by drying
Case dries solvent, winding.
Finished product is cured in 60 DEG C of curing chambers, after curing for 24 hours, is tested.
Comparative example 2
The comparison diffusion barrier face-coating is made of following component:
Ethyl acetate: 20.8 mass parts；Butyl acetate: 24.5 mass parts；It is acrylic resin modified: 20.7 mass parts；, expand
Powder: 17.3 mass parts；Additive: 0.03 mass parts；Curing agent: 1.4 mass parts.
It is positive to apply using 50umPET as substrate, it is dry by baking oven with the speed of 30m/min using gravure roll coating method
Dry solvent, winding.
The technique of back side overmolded is as follows: diffusion master mold being placed in structure wheel, by glue groove, by the glue of refractive index 1.49
It is transferred to diffusion master mold, by the semi-finished product of a step with the speed of 10min, under the action of press roller, the shape of master mold is turned
Print, obtains negative engraved film, and after UV lamp, by stripper roll, winding obtains product after overmolded.
Finished product is cured in 60 DEG C of curing chambers, after curing for 24 hours, is tested.
Above-mentioned test includes haze, t.t., anti-falling sphere, the indexs such as wear-resisting.
The test method of anti-falling sphere is as follows:
Diaphragm monomer is placed under simulation liquid crystal board (comprising polaroid, multilayer PET, diffuser plate), using the steel of different grammes per square metres
Ball is fallen with different distances, after bead falls, (is placed in 10.1 cun of backlights and is visually sentenced every whether 10s observation sample has to injure by a crashing object
Fixed, whether there is or not sentence).This item data in following table is the critical point that sample injures by a crashing object.
Haze, t.t. test equipment: NDH-2000, testing standard: JIS7136
Wear-resisting test method is as follows: diaphragm to be measured is placed in platform to be measured, 0000# steel wool is fixed on reference test bar,
Increase counterweight, the weight 0-20000g of counterweight on reference test bar, reference test bar rubs back and forth on piece to be measured, and test result is abrasion
Reach counterweight weight when identical standard.
Test result is as follows:
| Number | Anti- falling sphere | haze | t.t. | It is wear-resisting |
| Embodiment 1 | 160g,15cm | 95.48, | 75.23 | 600g |
| Embodiment 2 | 160g,18cm | 93.00, | 76.14 | 500g |
| Embodiment 3 | 160g,25cm | 95.34 | 75.00 | 600g |
| Embodiment 4 | 160g,27cm | 95.2 | 75.5 | 600g |
| Comparative example 1 | 160g,10cm | 95.33 | 75.13 | 20g |
| Comparative example 2 | 160g,12cm | 95.36 | 75.89 | 20g |
It applies the technical scheme of the present invention, the diffusion layer with roughness is prepared by using the mode of mold, it is opposite to expand
The diffusion layer of shot submode, more stable, anti-falling sphere performance is more preferable, thick by control meat, increases the cushion performance of diffusion layer,
Further improve anti-falling sphere ability
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of diffusion barrier, which is characterized in that the diffusion barrier includes substrate and is located at the positive positive diffusion layer of substrate, described
Positive diffusion layer realizes that the meat thickness of the positive diffusion layer is 3-10um by mold.
2. diffusion barrier as described in claim 1, which is characterized in that the diffusion barrier includes substrate and is located at substrate just
The positive diffusion layer and back diffusion layer, the back diffusion layer of reverse side realize that the roughness Ra of the positive diffusion layer is not small by mold
It is not less than 3um in the roughness Ra of 35um, the back diffusion layer.
3. diffusion barrier as described in claim 1, which is characterized in that the refractive index of glue used in the diffusion layer is 1.42-
1.53。
4. diffusion barrier as described in claim 1, which is characterized in that the viscosity of glue used in the diffusion layer is 5000-
15000cPa.s。
5. diffusion barrier as described in claim 1, which is characterized in that glue used in the diffusion layer includes: trifunctional polyurethane
Acrylic acid oligomer 30-50%, o-phenyl phenol epoxy acrylate 20-30%, phenoxyethyl acrylate 30-40% and draw
Send out agent 2-5%.
6. diffusion barrier as described in claim 1, which is characterized in that the substrate is any one of PET, PP, TAC.
7. diffusion barrier as described in claim 1, which is characterized in that the substrate with a thickness of 50-250um.
8. a kind of preparation method of diffusion barrier, which is characterized in that the described method includes: passing through mold in at least one side of substrate
Positive diffusion layer is formed, the meat thickness of the positive diffusion layer is 3-10um.
9. the preparation method of diffusion barrier as claimed in claim 8, which is characterized in that the described method includes: respectively in the base
The front and back sides of material form positive diffusion layer and back diffusion layer by front master mold and back side master mold, and the roughness of the front master mold is not
Less than 35um, the roughness of the back side master mold is not less than 3um.
10. the preparation method of diffusion barrier as claimed in claim 8 or 9, which is characterized in that the described method includes: the diffusion
The refractive index of glue used in layer is 1.42-1.53.
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| CN106233166A (en) * | 2014-04-21 | 2016-12-14 | 松下知识产权经营株式会社 | Optics and illuminating cover |
| CN106908871A (en) * | 2016-03-08 | 2017-06-30 | 宁波长阳科技股份有限公司 | A kind of preparation method for transferring diffusion barrier |
| CN107942420A (en) * | 2017-11-29 | 2018-04-20 | 宁波激智科技股份有限公司 | A kind of diffusion barrier for improving the anti-ball falling impact of light guide plate and preparation method thereof |
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2018
- 2018-09-26 CN CN201811121794.1A patent/CN109116451A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200639519A (en) * | 2005-01-25 | 2006-11-16 | Kolon Inc | Light-diffusion plate |
| KR20080037905A (en) * | 2006-10-27 | 2008-05-02 | 주식회사 엘지화학 | Diffusion film and method for preparing thereof |
| US20080192353A1 (en) * | 2007-02-14 | 2008-08-14 | Sony Corporation | Anti-glare film, method for manufacturing the same, and display device using the same |
| TW201122566A (en) * | 2009-12-23 | 2011-07-01 | Optivision Technology Inc | A diffuser sheet in a back light module |
| CN106233166A (en) * | 2014-04-21 | 2016-12-14 | 松下知识产权经营株式会社 | Optics and illuminating cover |
| CN106908871A (en) * | 2016-03-08 | 2017-06-30 | 宁波长阳科技股份有限公司 | A kind of preparation method for transferring diffusion barrier |
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Application publication date: 20190101 |