CN106496902A - A kind of light scattering thermoplastic polyester composition - Google Patents
A kind of light scattering thermoplastic polyester composition Download PDFInfo
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- CN106496902A CN106496902A CN201611016042.XA CN201611016042A CN106496902A CN 106496902 A CN106496902 A CN 106496902A CN 201611016042 A CN201611016042 A CN 201611016042A CN 106496902 A CN106496902 A CN 106496902A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention provides a kind of light scattering thermoplastic polyester resin composition, and the thermoplastic resin composition includes：（A）Transparent matrix material, its are selected from plexiglass and its copolymer, such as polymethyl methacrylate, styrene-methyl methacrylate copolymer, methyl methacrylate and methyl acrylate copolymer etc.；（B）Diffuser material, pet resin.Matrix material of the polyethylene terephthalate relative to 100 mass parts, from 1 ~ 50 mass parts, preferably 0.03 20 μm of its average particle size.The light diffuser plate prepared using the thermoplastic polyester resin composition（Film, piece）, the requirement of good light transmittance and haze can be met, it is adaptable to lampshade, skylight, advertising lamp box, Pointing sign board and field of liquid crystal etc..
Description
Technical field
The present invention relates to a kind of light scattering polyester and resin composition, can meet the requirement of high transmission rate and haze, it is suitable for
In lampshade, skylight, advertising lamp box, Pointing sign board and field of liquid crystal etc..
Background technology
As energy crisis and problem of environmental pollution are increasingly severe, energy-conservation, the theme of low-carbon (LC) penetrate into people's life gradually
Every aspect living.At present, solid light source progressively replaces due to having higher photoelectric transformation efficiency and environment friendly, just and passes
The light sources such as the daylight lamp of system, tengsten lamp, electricity-saving lamp.The main element of solid light source is light emitting diode（Abbreviation LED）, LED
As running voltage is low, low-power consumption, rich color, life-span length and the advantages of few environmental pollution, widely welcome,
The illumination of 21 century and display field will be played an important role.But LED is high due to its brightness, intensity is big, and light radiating surface is narrow,
Evenness is relatively low, and light source directivity is strong, is also easy to produce dazzle, and visual effect is not so good as high-pressure mercury lamp, and these defects hinder answering for LED
With and promote；The use of polymer matrix light-scattering material can solve these problems.Therefore, with LED lighting technology
Develop rapidly and extensively apply, it is new that the polymer matrix light-scattering material with haze and high transmission rate becomes Material Field
Study hotspot.
Polymer matrix light-scattering material refer to a class can pass light through and can effectively scattered light polymer matrix be combined
Material.The generally transparent thermoplastic resin of conventional polymeric matrix, such as polycarbonate resin, polyethylene terephthalate
Ester, plexiglass and its copolymer, polystyrene resins, polyolefin resin etc..Wherein poly- methyl-prop
Without phenyl ring in e pioic acid methyl ester resin and its copolymer molecule, ultraviolet light, good weatherability is not absorbed；Add its excellent printing opacity
Performance so that plexiglass and its copolymer have Research Significance and practicality as the matrix of light-scattering material
It is worth.
When plexiglass and its copolymer are as matrix material, need to add scattering particless to improve light
Scattering property, being commonly used for its scattering object mainly has：Inorganic scattering particless（As Calcium Carbonate, silicon dioxide, barium sulfate, aluminium hydroxide,
Glass microballoon, Muscovitum, white carbon, magnesium silicate, Titanium Dioxide etc.）, organic scattering particless（As crosslinked polymethylmethacrylaparticles,
Organic siliconresin etc.）, combination scattering particle and polymer scattering object.
Patent CN 1916041A reports doping SiO2The lucite light-scattering material of nanometer powder, can be used as light load
Body is widely used in illumination, various light sources and daylighting building.
Patent CN 101059568A is prepared for PMMA/SiO2Light scattering light conducting board, first synthesis contain SiO2Crystallite is by changing
The light scattering composite that key is connected with PMMA base materials is learned, then it is guide-lighting light scattering to be prepared by extrusion molding, injection or casting
Plate.
Patent CN 1591116A by the methyl acrylate copoly of the methyl methacrylate of 95% weight and 5% weight close with
Transparent thermoplastic resin is prepared, adds the Merlon of 3% weight as light scattering agent, light transmittance is 58.25%, and mist degree is
93.81%；And when adding the calcium carbonate granule of 3% weight as light scattering agent, light transmittance is 55.20%, and mist degree is 93.39%；Plus 3%
When the barium sulfate particle of weight is as light scattering agent, light transmittance is 55.96%, and mist degree is 93.14%.
Patent CN 101162274A coordinates the mineral-types different from its refractive index or organic light diffusing agent in PMMA
To adjust the light transmittance and mist degree of monolayer light diffusing sheet, it is prepared for that light transmittance from top to bottom gradually increases, mist degree is gradually lowered
Optical diffusible methyl crylic acid ester resin multilayer plate, wherein an embodiment multi-layer sheet light transmittance are 53.5%, and mist degree is 99.1%, lead to
Cross clear layer to show depth in light diffusion layer and there is feeling of high class, light diffusing can be excellent.
However, inorganic particle is when as light diffusing particles, with following weakness：1. material mist degree is being improved
Light transmittance can be made to decline by a relatively large margin simultaneously.2. the poor compatibility with matrix material, is difficult to be dispersed in matrix material.③
The inorganic particulate of larger addition will cause the mechanical property of material to be deteriorated.4. inorganic particulate hardness is bigger, can make to equipment
Into certain abrasion.5. some inorganic particulates have stronger absorption to the light of certain wave band, are unfavorable for producing scattering, and some
Particle is unfavorable for the stability of light scattering property to heat, oxygen and ultraviolet-sensitive.
Organic scattering object particle, and the compatibility of macromolecule matrix is preferably, the light-scattering material for preparing can have concurrently compared with
High light transmittance and mist degree.But conventional organic scattering object particle preparation cost is higher, and as inorganic particulate, material is being improved
While mist degree its light transmittance can decline, while non-deformable in forming process, obtained be isotropism light scattering
Material, this cause waste to a certain extent and limit which and apply to the energy.
A kind of new light diffuser plate resin combination is present inventors have developed, which includes：(1) transparent matrix material,
Which is selected from plexiglass and its copolymer, such as polymethyl methacrylate, Methyl Methacrylate-Styrene
Copolymer, methyl methacrylate and methyl acrylate copolymer etc.；(2) diffuser material, polyethylene terephthalate tree
Fat.From polymer as scattering object, there is incomparable advantage with respect to inorganic scattering particless and organic scattering particless：①
Similar with organic scattering particless, the light-scattering material of high transmission rate and haze can be obtained；2. scattering object size, form and take
Can be regulated and controled according to molding mode, moulding process to degree, and then each of light scattering is regulated and controled to the same opposite sex, can be prepared
Isotropism light-scattering material is obtained, also anisotropy light-scattering material can be prepared, this can make light efficiency be fully utilized；
3. equipment is not caused damage in production preparation process；Synergism can be produced with matrix material, some lack to matrix material
Row complementation is trapped into, the improvement important role to material property, so that overcome the resin combination for being generally used for light diffuser plate
The shortcoming of thing, with important theoretical and practical values.
Content of the invention
The present invention is carried out based on above-mentioned idea, and the purpose of the present invention is a kind of new light scattering polyester resin group of exploitation
Compound, material based on plexiglass and its copolymer, with general polymer poly terephthalic acid second two
Alcohol ester resin is diffuser material, using production cost relatively low, prepare simple method, overcome with inorganic particulate and organic
Particle prepares the defect of light-scattering material as light-scattering body, prepares the polymethyl methacrylate base of high transmission rate and haze
Light-scattering material.
The light scattering polyester and resin composition is relative to 100 mass parts（A）Polymethyl methacrylate and its copolymerization
Thing adds（B）Light scattering agent polyethylene terephthalate（1-50 mass parts）With（C）Additive composite is formed.Using
The light scattering polyester and resin composition can machine-shaping after melt blending（As compression molding, injection moulding, extrusion molding,
Moulding by casting etc.）Light-scattering material is obtained, preparation method is simple, with low cost, harmless to equipment in preparation process.
By foregoing illustrations and descriptions, it is an advantage of the invention that obviously：
1. the light scattering polyester and resin composition that the present invention is provided, its main base polymethyl methacrylate and its copolymer,
Strand can pass through major part ultraviolet, minimum to light absorption, and raw material sources are extensively, and cost is relatively low.
2. the light scattering polyester and resin composition that the present invention is provided, its light scattering agent polyethylene terephthalate,
With low cost, can be evenly distributed in matrix resin, and deformable or orientation during machine-shaping, prepare anisotropy
Light-scattering material.
3. the light scattering composite that the present invention is provided, its light transmittance, mist degree and light scattering property can be scattered by regulation and control
Bulk concentration, matrix and scattering object ratio of viscosities, processing conditionss and Effective Regulation.
4. the present invention can be obtained that light scattering property is excellent, any surface finish light-scattering material, obtained light-scattering material tool
There are preferable outward appearance and light stability.
5. the light scattering polyester and resin composition that the present invention is provided, its light scattering agent polyethylene terephthalate energy
Improve the thermostability under tensile strength, elongation at break and the high temperature of matrix plexiglass and its copolymer
And dimensional stability.
6. the light-scattering material that the present invention is provided, it is adaptable to multiple molding modes, such as compression molding, injection moulding, extrusion
Molding, moulding by casting etc., operation is simple, safe and reliable, can be mass-produced, and harmless to equipment in preparation process.
Description of the drawings
Fig. 1 is obtained dispersion effect of the pure polymethyl methacrylate light diffusion sheet to point source of light in comparative example
Photo.
Fig. 2 is obtained dispersion effect photo of the polymethyl methacrylate light diffusion sheet to point source of light in embodiment 1.
Fig. 3 is obtained dispersion effect photo of the polymethyl methacrylate light diffusion sheet to point source of light in embodiment 2.
Fig. 4 is obtained dispersion effect photo of the polymethyl methacrylate light diffusion sheet to point source of light in embodiment 3.
Fig. 5 is obtained dispersion effect photo of the polymethyl methacrylate light diffusion sheet to point source of light in embodiment 4.
Fig. 6 is obtained dispersion effect photo of the polymethyl methacrylate light diffusion sheet to point source of light in embodiment 5.
Specific embodiment
According to a kind of light scattering thermoplastic polyester composition of the present invention, the thermoplastic resin composition includes：（A）Transparent
Matrix material, its are selected from plexiglass and its copolymer, such as polymethyl methacrylate, methyl methacrylate
Ester-styrol copolymer, methyl methacrylate and methyl acrylate copolymer etc.；（B）Diffuser material, poly terephthalic acid
Glycol ester resin.
The pet resin of 5 ~ 40 mass parts is preferably used in substrate（B）, and its average grain grain
Footpath is preferably 0.03-20 μm, more preferably 0.1-15 μm.
The present invention will be described in as follows：
With light scattering thermoplastic polyester composition by the modes such as compression molding, injection moulding, extrusion molding or moulding by casting into
The light-diffusing films that type is obtained（Piece, plate）The fields such as lampshade, skylight, advertising lamp box, Pointing sign board and liquid crystal display are used in, are used for
Transmission, scattering from light source light.The generally transparent thermoplastic resin of the matrix of the thermoplastic polyester composition, such as poly- carbonic acid
Ester resin, polyethylene terephthalate, plexiglass and its copolymer, polystyrene resins, poly-
Olefine kind resin etc..Specifically, phenyl ring is not contained in plexiglass and its copolymer molecule, do not absorb ultraviolet
Light, good weatherability, and with excellent light transmission, the present invention is from plexiglass and its copolymer conduct
Matrix material prepares light-diffusing films（Piece, plate）.
The method is mainly characterized in that using common polymer poly ethylene glycol terephthalate as scattering object not
It is used as matrix.When polyethylene terephthalate is used as the scattering object for preparing light diffuser plate, it is variable in process
Shape or orientation, relative to the inorganic and organic scattering particless of tradition, the light-scattering material for preparing shows superior optical
Can be with effective Modulatory character of light scattering property.It is additionally, since polyethylene terephthalate less expensive, manufacturing cost can be big
Width reduces.
The light scattering polyester and resin composition and its light-scattering material of preparation that the present invention is provided is described in detail as follows：
（A）Matrix material
In the present invention, preferred plexiglass and its copolymer are used as matrix material, such as poly-methyl methacrylate
Ester, copolymer of methyl methacrylatestyrene, methyl methacrylate and methyl acrylate copolymer etc., select wherein one
Plant the mixture of polymer or two or more copolymers.The matrix material is transparent resins.
Transparent plexiglass and its copolymer resin are mainly by methacrylate（Such as metering system
Sour methyl ester, ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate etc.）, third
Olefin(e) acid ester（Such as acrylic acid methyl ester., ethyl acrylate, butyl acrylate, cyclohexyl acrylate etc.）, styrene, acrylonitrile, horse
Carry out at least two monomer of the monomers such as anhydride, styrene-butadiene latex to be polymerized.This can be easily made by those of ordinary skill in the art
Polymer or copolymer.
Transparent plexiglass and its copolymer resin must be dried process before processing, dry temperature
80-95 DEG C of prioritizing selection of degree.
（B）Diffuser material
The present invention is from general polymer polyethylene terephthalate as scattering object.Due to polyethylene terephthalate
Ester has good light transmission, thermostability, mechanical performance, rub resistance, dimensional stability etc., and therefore it has better than traditional light
The effect of scattering diluent.Also, polyethylene terephthalate is used as a kind of common polymer, with polymethyl methacrylate
Resin and its copolymer resin are incompatible, and in the range of certain interpolation, polyethylene terephthalate is with spherical, ellipsoid
The forms such as shape, fusiform, threadiness are dispersed in matrix resin.During machine-shaping, polyethylene terephthalate
The controllable such as the form of ester, particle diameter, draw ratio, number concentration, therefore can regulate and control light diffuser plate with this（Piece, film）Light scattering
Performance, such as regulation and control light diffuser plate（Piece, film）Light transmittance, mist degree, light scattering angle, light scattering effect, light scattering isotropism, light
Scattering anisotropy etc..
, used as a kind of common polymer, its price is far below conventional light scattering grain for polyethylene terephthalate
Son, even below matrix material, can be greatly lowered the cost of light-scattering material.
Polyethylene terephthalate is uniformly distributed in matrix resin as scattering object, in process, its
Hardness is less than traditional light diffusing particles（Inorganic scattering particles or organic scattering particles are not melted in the range of processing temperature, hardness
Higher）, therefore it will not in preparation process injury device.
As the polyethylene terephthalate of scattering object, the preferably characteristic in the range of processing temperature with matrix material
Viscosity ratio is 1.01 5, more preferably selects 1.01 3.
Relative to the matrix resin of 100 mass parts, as preferred diffuser material, polyethylene terephthalate
Content selects 1-50 mass parts, preferentially selects 1-40 mass parts.But specific addition depends on the thickness for preparing light-scattering material
Degree and the requirement to light transmittance and mist degree.When polyethylene terephthalate less than about 1 mass parts for using, light source will
It is transmitted many and scatters few；But if the polyethylene terephthalate for using is more than about 50 mass parts, light transmission will be big
Amplitude reduction.
In matrix, the average-size of scattering object polyethylene terephthalate depends on its consumption, can make in the present invention
About preferably 0.03 20 μm of the average particle size of polyethylene terephthalate, more preferably selects 0.1 15 μm.
Diffuser material polyethylene terephthalate must be dried process, baking temperature prioritizing selection before processing
80-120℃.
Except above-mentioned matrix resin and scattering object polymerization beyond the region of objective existence, it is the every physics and chemistry for improving light scattering thermoplastic polyester composition
Performance, can also blend various additives as needed, such as antioxidant, UV absorbers, releasing agent, antistatic additive, fire-retardant
Agent, UV absorbers etc., add species and weight can be readily carried out by those of ordinary skill in the art.
The light scattering polyester and resin composition of the present invention, can by compression molding, injection mo(u)lding, extrusion molding, pour into
The modes such as type prepare required light diffuser plate（Piece, film）.Preparation process depends on light diffuser plate（Piece, film）Purposes and select
Select, can be readily carried out by those of ordinary skill in the art.
Embodiment
With reference to following examples, the present invention can be better understood from.If do not done specified otherwise, it is poly- that following examples are used
Ethylene glycol terephthalate intrinsic viscosity is more than matrix resin.These embodiments are for the purpose of illustration, it is impossible to by any side
Formula is construed to limitation of the scope of the invention, and the scope of the invention is determined by appended claim.Sample in following embodiments
The WGT-S light transmittance mist degree instrument that light transmittance and mist degree are produced using Shanghai Precision Scientific Apparatus Co., Ltd is measured.
Embodiment 1
The plexiglass of 100 mass parts, the polyethylene terephthalate of 2 mass parts and conventional additives
Light scattering polyester and resin composition is obtained after torque rheometer melt blending.By the complex in 265 DEG C of compression molding systems
Obtain the thick light diffusion sheets of 0.60mm.It is 77.5% to measure its light transmittance, and mist degree is 88.90%.After point source of light is through the light diffusion sheet,
Dispersion effect is as shown in Figure 2.
Embodiment 2
The plexiglass of 100 mass parts, the polyethylene terephthalate of 6 mass parts and conventional additives
Light scattering polyester and resin composition is obtained after torque rheometer melt blending.By the complex in 265 DEG C of compression molding systems
Obtain the thick light diffusion sheets of 0.60mm.It is 64.2% to measure its light transmittance, and mist degree is 94.41%.After point source of light is through the light diffusion sheet,
Dispersion effect is as shown in Figure 3.
Embodiment 3
The plexiglass of 100 mass parts, the polyethylene terephthalate of 10 mass parts and conventional interpolation
Agent obtains light scattering polyester and resin composition after torque rheometer melt blending.By the complex in 265 DEG C of compression moldings
The thick light diffusion sheets of prepared 0.60mm.It is 58.9% to measure its light transmittance, and mist degree is 94.65%.Point source of light is through the light diffusion sheet
Afterwards, dispersion effect is as shown in Figure 4.
Embodiment 4
The plexiglass of 100 mass parts, the polyethylene terephthalate of 30 mass parts and conventional interpolation
Agent obtains light scattering polyester and resin composition after torque rheometer melt blending.By the complex in 265 DEG C of compression moldings
The thick light diffusion sheets of prepared 0.60mm.It is 64.8% to measure its light transmittance, and mist degree is 94.56%.Point source of light is through the light diffusion sheet
Afterwards, dispersion effect is as shown in Figure 5.
Embodiment 5
The plexiglass of 100 mass parts, the polyethylene terephthalate of 30 mass parts and conventional interpolation
Agent obtains light scattering polyester and resin composition after torque rheometer melt blending.By the complex in 265 DEG C of compression moldings
The thick light diffusion sheets of prepared 0.30mm.It is 70.8% to measure its light transmittance, and mist degree is 94.51%.Point source of light is through the light diffusion sheet
Afterwards, dispersion effect is as shown in Figure 6.
Comparative example
The plexiglass of 100 mass parts and conventional additives obtain light after torque rheometer melt blending and dissipate
Penetrating property polyester and resin composition.The complex is obtained the thick light diffusion sheets of 0.60mm in 265 DEG C of compression moldings.Measure its printing opacity
Rate is 92.5%, and mist degree is 3.24%.After point source of light is through the light diffusion sheet, dispersion effect is as shown in Figure 1.
Claims (9)
1. a kind of light scattering thermoplastic polyester composition, the thermoplastic resin composition include：
（A）Transparent matrix material, its are selected from plexiglass and its copolymer, such as polymethyl methacrylate,
Copolymer of methyl methacrylatestyrene, methyl methacrylate and methyl acrylate copolymer etc.；
（B）Diffuser material, pet resin.
2. light scattering polymer blend as claimed in claim 1, wherein described diffuser material polyethylene terephthalate
Ester resin, relative to the matrix material of 100 mass parts, from 1 ~ 50 mass parts.
3. light scattering polymer blend as claimed in claim 2, wherein described diffuser material polyethylene terephthalate
Ester resin, relative to the matrix material of 100 mass parts, preferentially selects 1 ~ 40 mass parts.
4. light scattering polyester and resin composition as claimed in claim 1, wherein described diffuser material poly terephthalic acid second
About 0.03 20 μm of the average particle size of terephthalate resin.
5. light scattering polyester and resin composition as claimed in claim 4, wherein described diffuser material poly terephthalic acid second
About 0.1 15 μm of the average particle size of terephthalate resin.
6. light scattering polyester and resin composition as claimed in claim 1, wherein described diffuser material poly terephthalic acid second
The intrinsic viscosity of terephthalate resin is 1.01 5 with the ratio of matrix material intrinsic viscosity in the range of the processing temperature.
7. light scattering polyester and resin composition as claimed in claim 6, wherein described diffuser material poly terephthalic acid second
The intrinsic viscosity of terephthalate resin is preferably 1.01 3 with the ratio of matrix material intrinsic viscosity in the range of the processing temperature.
8., such as the light scattering polyester and resin composition that right 1 is required, wherein described light scattering polyester and resin composition can pass through
Compression molding, injection mo(u)lding, extrusion molding, moulding by casting etc. prepare required light diffuser plate（Film, piece）.
9. using any one of 1～8 obtained light-scattering material, it is adaptable to lampshade, skylight, advertising lamp box, Pointing sign board and liquid
The light diffuser plate in the fields such as crystal display（Film, piece）.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109021528A (en) * | 2018-05-24 | 2018-12-18 | 四川大学 | A method of it improving anisotropy light-scattering material short axle and scatters direction angle of scattering |
| CN109575489A (en) * | 2018-12-11 | 2019-04-05 | 苏州双象光学材料有限公司 | A kind of preparation method of PMMA composite material |
| CN109721955A (en) * | 2017-10-27 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of antistatic car light lampshade |
| CN109721962A (en) * | 2017-10-30 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of high light transmission car light lampshade |
| CN109721961A (en) * | 2017-10-30 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of high intensity car light lampshade |
| CN109721960A (en) * | 2017-10-30 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of antiultraviolet electric car lamp lampshade |
| CN111875747A (en) * | 2020-08-04 | 2020-11-03 | 无锡龙友光学材料有限公司 | Method for manufacturing light guide plate with dot-matrix-free light guide characteristic |
| WO2021137093A1 (en) * | 2019-12-30 | 2021-07-08 | 3M Innovative Properties Company | Bulk diffuser |
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| CN101675116A (en) * | 2007-02-26 | 2010-03-17 | 东曹株式会社 | Resin composition for optical film, and optical film comprising the same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109721955A (en) * | 2017-10-27 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of antistatic car light lampshade |
| CN109721962A (en) * | 2017-10-30 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of high light transmission car light lampshade |
| CN109721961A (en) * | 2017-10-30 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of high intensity car light lampshade |
| CN109721960A (en) * | 2017-10-30 | 2019-05-07 | 江苏瑞凌新能源科技有限公司 | A kind of antiultraviolet electric car lamp lampshade |
| CN109021528A (en) * | 2018-05-24 | 2018-12-18 | 四川大学 | A method of it improving anisotropy light-scattering material short axle and scatters direction angle of scattering |
| CN109021528B (en) * | 2018-05-24 | 2020-12-11 | 四川大学 | Method for improving short axis scattering direction scattering angle of anisotropic light scattering material |
| CN109575489A (en) * | 2018-12-11 | 2019-04-05 | 苏州双象光学材料有限公司 | A kind of preparation method of PMMA composite material |
| WO2021137093A1 (en) * | 2019-12-30 | 2021-07-08 | 3M Innovative Properties Company | Bulk diffuser |
| CN111875747A (en) * | 2020-08-04 | 2020-11-03 | 无锡龙友光学材料有限公司 | Method for manufacturing light guide plate with dot-matrix-free light guide characteristic |
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