CN111458774A - Multilayer superposed polymer composite light diffusion plate and production process thereof - Google Patents
Multilayer superposed polymer composite light diffusion plate and production process thereof Download PDFInfo
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- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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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
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
Abstract
The invention discloses a multilayer superposed polymer composite light diffusion plate, which belongs to the field of light diffusion plates. And the light incident layer is used for reducing incident light reflection and is positioned on the first surface of the basic layer. And the action layer contains second-type light diffusion particles with second concentration and is used for realizing the Lambert-type light distribution function, and the action layer is positioned on the second surface of the base layer. The multilayer superposed polymer composite light diffusion plate disclosed by the invention adopts a multilayer light diffusion plate body with more than three layers similar to a sandwich structure and different functions, so that the uniform diffusion of light is ensured, and further, the optical effects of high light efficiency, high haze, high uniformity, high color rendering property and the like are achieved, and the problem of poor light efficiency, haze and light transmittance in the prior art is solved.
Description
Technical Field
The invention relates to the field of light diffusion plates, in particular to a multilayer superposed polymer composite light diffusion plate and a production process for the light diffusion plate.
Background
The light diffusion plate is a material with light diffusion property, and mainly has the main functions of adjusting light rays and enabling the light rays to be refracted, reflected and scattered in different directions so as to change the traveling route of the light.
The Chinese patent document publication No. CN110261943A discloses a multilayer co-extrusion composite light diffusion plate and a preparation method thereof, the multilayer co-extrusion composite light diffusion plate is a three-layer co-extrusion plate consisting of a1 st light diffusion material layer and a 3 rd light diffusion material layer on the front and back surfaces and a2 nd transparent material layer in the middle, the light diffusion material layer is compounded on the surface of the transparent material layer on a transparent material layer body in a multi-layer co-extrusion compounding mode, the transparent material layer is formed by one or more of PC, PMMA and PS, and the light diffusion material layer is a light diffusion PC material layer, a light diffusion PMMA and a light diffusion PS material layer.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a multilayer laminated polymer composite light diffusion plate, which adopts a multilayer light diffusion plate body with more than three layers similar to a sandwich structure and different functions, so as to ensure the uniform diffusion of light, further achieve the optical effects of high luminous efficiency, high haze, high uniformity, high color rendering property and the like, and solve the problem of poor luminous efficiency, haze and light transmittance in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a multilayer superposed polymer composite light diffusion plate, which comprises:
the base layer contains first-class light diffusion particles with first concentration and is used for secondary refraction and scattering treatment of incident light. And the light incident layer is used for reducing incident light reflection and is positioned on the first surface of the basic layer. And the action layer contains second-type light diffusion particles with second concentration and is used for realizing the Lambert-type light distribution function and effectively refracting and scattering, and the action layer is positioned on the second surface of the base layer.
The thickness of the base layer is greater than that of the light incident layer, the thickness of the base layer is greater than that of the active layer, the second concentration is greater than the first concentration, and the base layer, the light incident layer and the active layer are made of the same material.
According to the further technical scheme provided by the invention, the thickness of the base layer is greater than that of the light incident layer, the thickness of the base layer is greater than that of the action layer, the thickness of the light incident layer is controlled to be 1-10% of the overall thickness of the composite light diffusion plate, and the thickness of the action layer is controlled to be 5-20% of the overall thickness of the composite light diffusion plate.
According to a further technical scheme provided by the invention, the particle size of the second type of light diffusion particles is larger than that of the first type of light diffusion particles.
According to the further technical scheme provided by the invention, the particle size and the first concentration of the first type of light diffusion particles in the basic layer are adjusted by adding light diffusers with different particle sizes and different contents; or the particle diameter and the first concentration of the first type light diffusion particles in the base layer are adjusted by subjecting the base layer to a micro-foaming treatment.
According to the further technical scheme provided by the invention, the base layer is subjected to micro-foaming treatment to form bubbles with the diameter of 1-10 microns, and the refractive index between small bubbles and diffusion particles formed by the micro-foaming treatment of the base layer is larger, so that the scattering effect is better.
According to the further technical scheme provided by the invention, the light incident surface of the light incident layer is subjected to microstructure processing; and/or performing microstructure processing on the light-emitting surface of the action layer.
According to the further technical scheme provided by the invention, the thickness of the light incident layer is smaller than that of the action layer, and the number of the light incident layer, the number of the base layer and the number of the action layer are more than two.
According to a further technical scheme provided by the invention, the light incident layer, the base layer and the action layer are all made of GPPS; or the light incident layer, the base layer and the action layer are all made of PMMA; or the light incident layer, the base layer and the action layer are all made of PC.
The invention provides a production process for the multilayer superposed polymer composite light diffusion plate, which is implemented according to the following steps:
and setting the thicknesses of the light incident layer, the base layer and the action layer according to a preset thickness.
One of three materials of GPPS, PMMA and PC is selected as the raw material of the optical layer.
And adding a first type of light diffusion agent into the light layer raw material of the base layer to form first type of light diffusion particles.
And adding a second type of light diffusion agent into the light layer raw material of the action layer to form first type of light diffusion particles.
The first light diffusing agent and the second light diffusing agent can be light diffusing agents with different types and specifications or different types of light diffusing agents, and when the first light diffusing agent and the second light diffusing agent are light diffusing agents with different types and specifications, the particle size of the first light diffusing agent is smaller than that of the second light diffusing agent. When the first type of light diffusing agent and the second type of light diffusing agent are different types of light diffusing agents, the different light diffusing agents usually have different transparencies and different light reflection and refraction capabilities, and the particle size of the first type of light diffusing agent is still required to be smaller than that of the second type of light diffusing agent. Therefore, the light permeability of the base layer is more excellent, and the optical performance of the multilayer light diffusion plate body is improved.
The light diffusion agent of the invention adopts conventional inorganic light diffusion agents and organic light diffusion agents, the conventional light diffusion agent usually takes the inorganic light diffusion agent as the main component, and the inorganic light diffusion agents comprise: the inorganic light diffusant is extremely tiny solid micro-beads seen from a microscopic view, is almost nano-particles, and can be refracted or reflected for countless times when contacting the surfaces of the solid micro-beads, so that the effect of light uniformization is achieved. Since light cannot pass through the solid micro-beads, the light energy loss is large. The incremental effect of the composite light diffuser plate using the inorganic light diffuser is generally not sufficient, and only an improvement in light softness can be obtained. Therefore, the organic light diffusing agent is preferable in the present application, and common organic light diffusing agents include: the light diffusing agent is usually a fine transparent sphere, can transmit light, can well solve the problems of light homogenizing and light transmitting, and can uniformly disperse strong light through refraction. The invention provides a production process for the multilayer superposed polymer composite light diffusion plate, which does not limit the use of inorganic light diffusant or organic light diffusant, and can effectively improve the light transmission effect of the plate body by adopting the technical scheme of the invention no matter which light diffusant is adopted.
The first type of light diffusing agent is added in an amount such that the first type of light diffusing particles in the base layer are at a first concentration; the second type of light diffusing agent is added in an amount such that the second type of light diffusing particles in the base layer is at a second concentration, the second concentration being greater than the first concentration.
And generating the composite light diffusion plate comprising the light incident layer, the base layer and the action layer by adopting multilayer co-extrusion equipment.
According to a further technical scheme provided by the invention, the production process for the multilayer superposed polymer composite light diffusion plate further comprises the step of performing microstructure treatment on the light incident surface of the light incident layer and/or the light emergent surface of the action layer. The microstructure processing means that the array arrangement of the micro-feature structures on the surfaces of the light inlet surface of the light inlet layer and/or the light outlet surface of the action layer is changed, so that light rays are refracted in different directions when passing through, the traveling route of the light is changed, the incident light is fully dispersed, the emergent light is softer and more uniform, the materials of the light inlet surface and the action layer are high-light-transmittance materials, the high-light-transmittance characteristics can be continued after the microstructure processing is carried out on the light inlet surface and the action layer, and the light inlet surface and the action layer after the microstructure processing have the characteristic of low light loss. Common array arrangements of microfeatures include the following: 1. a V-shaped groove array; 2. a U-shaped tongue array; 3. a pyramid array; 4. an array of circular rings; 5. a microlens array.
The invention has the beneficial effects that:
the multilayer superposed polymer composite light diffusion plate provided by the invention is provided with a base layer, a light incident layer positioned on the first surface of the base layer and an action layer positioned on the second surface of the base layer. The incident layer needs to ensure that the reflectivity of incident light must be reduced, so that all light incident on the surface of the incident layer can pass through the incident layer with the maximum efficiency, and the problem of poor light transmittance in the prior art is solved. The base layer needs to maintain the characteristics of high light efficiency and high haze of the plate body, which is the guarantee of the overall physical performance of the plate body, and the base layer also needs to reduce the light absorption rate as much as possible. The active layer is mainly used for realizing a Lambertian light distribution function, so that light is fully refracted and scattered, and full diffuse reflection is realized. The light diffusant, the microstructure, the size thickness and the like of the base layer, the light incident layer and the action layer are reasonably arranged, so that the composite light diffuser plate achieves the optical effects of high lighting effect, high haze, high uniformity, high color rendering property and the like. In addition, the multilayer laminated polymer composite light diffusion plate provided by the invention uses a sandwich multilayer coextrusion composite forming diffusion plate, and the diffusion effect can reach the ideal indexes of high light efficiency, high haze, high uniformity and high color rendering property by adjusting the structure, thickness, light diffusant type, addition amount and other processes of three layers of materials and the change of the surface microstructure shapes of the light incident surface and the light emergent surface, so that the problems of low haze and light transmittance and the like which cannot be solved by the traditional process are solved.
Drawings
FIG. 1 is a flow chart of a process for fabricating a multi-layer laminated polymer composite diffuser plate according to an embodiment;
FIG. 2 is a schematic structural diagram of a multi-layer laminated polymer composite diffuser plate according to an embodiment.
In the figure: 1. a light incident layer; 2. a base layer; 3. and an action layer.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
As shown in fig. 1 and fig. 2, in the first embodiment, the multilayer laminated polymer composite diffuser plate includes a base layer 2, a light incident layer 1, and an active layer 3, where the light incident layer 1 is located on a first surface of the base layer 2, and the active layer 3 is located on a second surface of the base layer 2. The base layer 2, the light incident layer 1 and the action layer 3 are made of the same material, the production cost can be greatly reduced and the production efficiency can be improved by adopting the same material, and the optical effects of high luminous efficiency, high haze, high uniformity, high color rendering property and the like can be achieved by adopting multiple materials or multiple additives in the prior art.
The relevant theoretical basis is as follows: from the beer-lambert law a-lg (1/T) -Kbc, b is the thickness of the absorbing layer, c is the concentration of the light absorbing substance, and both b and c are proportional to the absorbance a. Therefore, the absorbance A of the composite diffusion plate can be changed by properly adjusting the values of "b" and "c" in the three layers of the base layer 2, the light incident layer 1 and the active layer 3.
When light is reflected and refracted on two medium surfaces according to a Fresnel (Fresnel) formula, the reflectivity and the refractive index of the light are related to the refractive index properties and the incidence angle of the two materials. Therefore, the reflection and refraction effects of the incident light of the composite light diffusion plate can be adjusted by adjusting the material properties, the incident angle and the like, so that the light transmittance of the plate body is changed, and in the embodiment, the light transmittances of the base materials of the base layer 2, the light incident layer 1 and the active layer 3 are utilized, and different functions are given by considering the cooperation of the base layer 2, the light incident layer 1 and the active layer 3.
And a light entrance layer 1 for reducing reflection of incident light. Preferably, carry out micro-structure processing to entering light layer 1, micro-structure processing makes the reflection light of foundation layer 2 become random because its unevenness, refracts and reflection light reduces to promote the luminousness of entering light layer 1, and then change the plate body light efficiency. Moreover, the light entering layer 1 should ensure that the reflected light is as little as possible and the light passing through is as much as possible, so if a light diffusing agent is added to the light entering layer 1, the reflection effect of the light entering layer 1 is inevitably increased, and therefore, the light transmittance of the light entering layer 1 can be greatly reduced by adopting a mode of performing micro-structural treatment on the outer surface of the light entering layer 1.
The base layer 2 contains a first concentration of first light diffusion particles for secondary refraction and scattering of incident light. The light refraction and scattering effects are changed by adjusting the number of the first concentration and the particle size of the first type of light diffusion particles, so that the optical properties such as the light effect and the haze of the plate body are improved. The base layer 2 is also a supporting layer for the physical properties of the whole material, and can most represent the physical properties of the whole material of the board body material, for example: the integral conductivity, impact resistance, flatness and other plate body strength performances of the plate body of the composite light diffusion plate. The base layer 2 no longer needs to keep enough light incidence with respect to the light-entering layer 1, but should change the light refraction and scattering effect as much as possible while keeping good light transmittance or light transmittance. Therefore, the first type of light diffusion particles should not be too much or too large, because the light transmittance is affected, and the light refraction and scattering needs to be changed, so the thickness of the first type of light diffusion particles is relatively thick, and the light refraction and scattering are sufficient and uniform.
And an active layer 3 containing a second type of light diffusion particles at a second concentration for realizing a Lambertian light distribution function. The second concentration is greater than the first concentration, that is, the concentration of the second type of light diffusion particles of the active layer 3 is greater than that of the first type of light diffusion particles of the base layer 2, which is mainly because the active layer 3 mainly aims to make the diffuse reflection effect more sufficient and ensure that the plate body has the characteristic of high haze. The action layer 3 is used as the last threshold, the diffuse reflection effect is required to be more sufficient, and because the action layer 3 is also provided with the light incident layer 1 and the base layer 2, the light emitted from the action layer 3 is difficult to emit from the light incident layer 1, the light is very easy to turn back after passing through the base layer 2 with thicker thickness, the light is easy to enter the high-molecular composite light diffusion plate through the matching of the three layers, but the light is very difficult to exit from the light incident layer 1, and only can be sufficiently reflected, refracted or scattered, and the light passing through the action layer 3 is sufficiently diffuse reflected, so that the haze characteristic of the plate body is greatly improved. The light distribution performance of the plate body is close to ideal Lambert-type light distribution through the action of the action layer 3. The lambertian radiator refers to a radiation source in which the radiation brightness of the radiation source in all directions is unchanged, and the radiation intensity follows the cosine law along with the change of an included angle theta between the observation direction and the normal line of a surface source, and is an ideal diffuse reflection source.
The first-type light diffusion particles and the second-type light diffusion particles referred to in this embodiment are particles capable of reflecting or refracting light, and they may be formed of the first-type light diffusing agent and the first-type light diffusing agent, respectively, or may be formed of bubbles formed by micro-foaming, or may be a mixture of both.
Preferably, the thickness of the base layer 2 is greater than that of the light incident layer 1, and the thickness of the base layer 2 is greater than that of the active layer 3, and since the base layer 2 is a support layer for physical properties of the whole material, the base layer 2 needs to be added appropriately, so that the overall performance of the bulk of the multilayer laminated polymer composite light diffusion plate is closer to the expected performance. The thickness of the light incident layer 1 is controlled to be 1-10% of the overall thickness of the composite light diffusion plate, the thickness of the action layer 3 is controlled to be 5-20% of the overall thickness of the composite light diffusion plate, and the rest is the base layer 2. The arrangement mode not only reserves the overall performance composite expected performance of the body of the composite light diffusion plate through the base layer 2, but also fully utilizes the respective advantages of the light incident layer 1 and the action layer 3, and particularly avoids the reflection of light rays in the process of full diffuse reflection of the action layer 3, so that the overall performance of the multilayer superposed high-molecular composite light diffusion plate is greatly improved, and further optical effects of high light efficiency, high haze, high uniformity, high color rendering property and the like are achieved.
Preferably, the particle size of the second type of light-diffusing particles is larger than the particle size of the first type of light-diffusing particles. The particle diameter difference of basic unit 2 and active layer 3 can make the printing opacity ability of plate body change, and basic unit 2 both will guarantee the printing opacity, will guarantee good haze performance again, and active layer 3 then mainly is in order to reach good refraction, scattering effect, and active layer 3 needs to have stronger diffuse reflection effect, so the particle diameter of its second type light diffusion particle is greater than the particle diameter of first type light diffusion particle, is favorable to promoting the diffuse reflection effect of active layer 3.
In order to achieve the predetermined optical effect of the base layer 2, one way is to adjust the particle size and the first concentration of the first type of light diffusion particles in the base layer 2 by adding light diffusers with different particle sizes and different contents. In another embodiment, the particle diameter and the first concentration of the first type light diffusion particles in the base layer 2 are adjusted by subjecting the base layer 2 to a micro-foaming treatment. The final purpose is to make the particle size and the first concentration of the first type of light diffusion particles inside the base layer 2 reach a preset level, and the preset level is usually set according to the index requirements of customers, so that the overall optical performance of the base layer 2 is improved. Further preferably, the base layer 2 is micro-foamed to form bubbles with a diameter of 1-10 μm, and the bubbles are first light diffusion particles, and the first light diffusion particles mainly have light refraction and diffuse reflection effects.
The thickness of the base layer 2 is adjusted to a preset thickness, and the concentration of the first type light diffusion particles is adjusted to a first concentration by adding the first type light diffusion agent. The preset thickness of the base layer 2 is equal to the thickness of the multilayer superposed polymer composite light diffusion plate minus the thicknesses of the light incident layer 1 and the active layer 3, and is about 70-94% of the whole thickness of the plate body. Preferably, the second type of light diffusing agent is added to adjust the concentration of the second type of light diffusing particles in the active layer 3 to a second concentration until the haze of the active layer 3 is adjusted to the preset haze. As can be seen, the active layer 3 is a treated layer for adjusting the haze of the entire plate body. Preferably, the first type of light diffusing agent and the second type of light diffusing agent are only one type of light diffusing agent with different specifications, so that the procurement cost of the plate body can be further reduced.
The light diffusion agent adopts conventional inorganic light diffusion agents and organic light diffusion agents, the conventional light diffusion agent generally takes the inorganic light diffusion agent as the main material, and the inorganic light diffusion agents comprise: the inorganic light diffusant is extremely tiny solid micro-beads seen from a microscopic view, is almost nano-particles, and can be refracted or reflected for countless times when contacting the surfaces of the solid micro-beads, so that the effect of light uniformization is achieved. Since light cannot pass through the solid micro-beads, the light energy loss is large. The incremental effect of the composite light diffuser plate using the inorganic light diffuser is generally not sufficient, and only an improvement in light softness can be obtained. Therefore, the organic light diffusing agent is preferable in the present application, and common organic light diffusing agents include: the light diffusing agent is usually a fine transparent sphere, can transmit light, can well solve the problems of light homogenizing and light transmitting, and can uniformly disperse strong light through refraction. The invention provides a production process for the multilayer superposed polymer composite light diffusion plate, which does not limit the use of inorganic light diffusant or organic light diffusant, and has the improvement effect by adopting the technical scheme of the invention no matter which light diffusant is adopted.
Preferably, the thickness of the light incident layer 1 is smaller than that of the active layer 3, and the number of light incident layers 1, the number of base layers 2, and the number of active layers 3 are two or more. Suppose that: the light incident layer 1, the base layer 2 and the active layer 3 of the multilayer laminated polymer composite light diffusion plate are respectively a layer A, a layer B and a layer C, and multilayer extension such as A1A 2/B1B 2/C1C 2 can be performed on the basis of the three layers of the layer A, the layer B and the layer C, and the multilayer extension can be classified according to the bearing functions and roles of the layer A, the layer B and the layer C.
Preferably, the light entrance layer 1, the base layer 2 and the active layer 3 are all made of GPPS or the light entrance layer 1, the base layer 2 and the active layer 3 are all made of PMMA or the light entrance layer 1, the base layer 2 and the active layer 3 are all made of PC. That is, the light incident layer 1, the base layer 2 and the active layer 3 are usually made of the same material, and the factors such as microstructure, light diffusing agent and thickness are different, so that the light incident layer achieves better optical characteristics. It can be known that the light incident layer 1, the base layer 2 and the active layer 3 are made of the same material, which can greatly reduce the production cost of the multilayer laminated polymer composite light diffusion plate.
Example two
As shown in fig. 1, the second embodiment of the present invention provides a process for manufacturing the above-mentioned multilayer laminated polymer composite diffuser plate, which includes the following steps:
the thicknesses of the light incident layer 1, the base layer 2, and the active layer 3 are set to a predetermined thickness.
One of three materials of GPPS, PMMA and PC is selected as the raw material of the optical layer.
A first light diffusion agent is added to the raw material of the optical layer of the base layer 2 to form first light diffusion particles.
A second type of light diffusion agent is added to the light layer raw material of the active layer 3 to form second type of light diffusion particles.
The first type of light diffusing agent and the first type of additive are added in such an amount that the first type of light diffusing particles in the base layer 2 are at a first concentration; the second type of light diffusing agent and the second type of additive are added in such amounts that the second type of light diffusing particles in the base layer 2 are at a second concentration, the second concentration being greater than the first concentration.
And a multilayer co-extrusion device is adopted to generate the composite light diffusion plate comprising the light incident layer 1, the base layer 2 and the action layer 3. The multilayer co-extrusion equipment can simultaneously form the light incident layer 1, the base layer 2 and the action layer 3 at one time, and can also effectively reduce the production cost of the multilayer superposed polymer composite light diffusion plate.
The production process for the multilayer superposed polymer composite diffuser plate further includes performing microstructure processing on the light incident surface of the light incident layer 1 and/or the light emergent surface of the active layer 3, which is described above, and the microstructure processing function performed on the light incident surface of the light incident layer 1 is not described herein again, and the main function of the microstructure processing performed on the light emergent surface of the active layer 3 is to further enhance the diffuse reflection effect of the active layer 3. The microstructure treatment of the light incident surface of the light incident layer 1 and/or the light emergent surface of the action layer 3 means that the array arrangement of the micro-feature structures on the surfaces of the light incident surface of the light incident layer and/or the light emergent surface of the action layer is changed, so that light rays are refracted in different directions when passing through, the traveling route of the light is changed, the incident light is fully dispersed, the emergent light is softer and more uniform, the light incident surface and the action layer are made of high-light-transmittance materials, the high-light-transmittance characteristics can be continued after the microstructure treatment of the light incident surface and the action layer, and the light incident surface and the action layer after the microstructure treatment also have the characteristic of low light loss. Common array arrangements of microfeatures include the following: 1. a V-shaped groove array; 2. a U-shaped tongue array; 3. a pyramid array; 4. an array of circular rings; 5. a microlens array.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (10)
1. A multilayer laminated polymer composite light diffuser plate is characterized by comprising:
the basic layer contains first-class light diffusion particles with first concentration and is used for secondary refraction and scattering treatment of incident light;
a light entry layer for reducing reflection of incident light, the light entry layer being located on a first surface of the base layer;
the action layer contains second-type light diffusion particles with second concentration and is used for realizing a Lambert-type light distribution function, and the action layer is positioned on the second surface of the base layer;
the second concentration is greater than the first concentration;
the base layer, the light incident layer and the active layer are made of the same material.
2. The multilayer laminated polymer composite diffuser plate of claim 1, wherein:
the thickness of the base layer is larger than that of the light incident layer;
the thickness of the base layer is greater than that of the active layer;
the thickness of the light incident layer is controlled to be 1-10% of the whole thickness of the composite light diffusion plate;
the thickness of the action layer is controlled to be 5-20% of the whole thickness of the composite light diffusion plate.
3. The multilayer laminated polymer composite light diffuser plate of claim 1 or 2, wherein:
the particle size of the second type of light diffusion particles is larger than that of the first type of light diffusion particles.
4. The multilayer laminated polymer composite diffuser plate of claim 3, wherein:
adjusting the particle size and the first concentration of the first type of light diffusion particles in the base layer by adding light diffusing agents with different particle sizes and different contents; or the particle diameter and the first concentration of the first type light diffusion particles in the base layer are adjusted by subjecting the base layer to a micro-foaming treatment.
5. The multilayer laminated polymer composite diffuser plate of claim 4, wherein:
and carrying out micro-foaming treatment on the base layer to form bubbles with the diameter of 1-10 mu m.
6. The multilayer laminated polymer composite diffuser plate of claim 1, wherein:
carrying out microstructure processing on the light incident surface of the light incident layer; and/or
And carrying out microstructure processing on the light-emitting surface of the action layer.
7. The multilayer laminated polymer composite diffuser plate of claim 1, wherein:
the thickness of the light incident layer is smaller than that of the action layer;
the number of the light incident layers, the number of the base layers and the number of the action layers are all more than two.
8. The multilayer laminated polymer composite diffuser plate of claim 1, wherein:
the light incident layer, the base layer and the action layer are all made of GPPS; or
The light incident layer, the base layer and the action layer are all made of PMMA; or
The light incident layer, the base layer and the action layer are all made of PC.
9. A process for producing the multilayer laminated polymer composite diffuser plate as claimed in any one of claims 1 to 8, which comprises the following steps:
setting the thicknesses of the light incident layer, the base layer and the action layer according to a preset thickness;
selecting one of GPPS, PMMA and PC as a light layer raw material;
adding a first type of light diffusion agent into the light layer raw material of the base layer to form first type of light diffusion particles;
adding a second type of light diffusion agent into the light layer raw material of the action layer to form second type of light diffusion particles;
the first type of light diffusing agent is added in an amount such that the first type of light diffusing particles in the base layer are at a first concentration; the second type of light diffusion agent and the second type of additive are added in an amount such that the second type of light diffusion particles in the base layer are at a second concentration, the second concentration being greater than the first concentration;
and generating the composite light diffusion plate comprising the light incident layer, the base layer and the action layer by adopting multilayer co-extrusion equipment.
10. The production process according to claim 9, characterized in that:
and the micro-structure processing is carried out on the light incident surface of the light incident layer and/or the light emergent surface of the action layer.
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