CN114163679A - Micro-foaming diffusion plate - Google Patents

Micro-foaming diffusion plate Download PDF

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Publication number
CN114163679A
CN114163679A CN202111397045.3A CN202111397045A CN114163679A CN 114163679 A CN114163679 A CN 114163679A CN 202111397045 A CN202111397045 A CN 202111397045A CN 114163679 A CN114163679 A CN 114163679A
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CN
China
Prior art keywords
layer
micro
light
layers
foaming
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Pending
Application number
CN202111397045.3A
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Chinese (zh)
Inventor
吴恺
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Changzhou Aozhi Polymer New Material Co ltd
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Changzhou Aozhi Polymer New Material Co ltd
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Priority to CN202111397045.3A priority Critical patent/CN114163679A/en
Publication of CN114163679A publication Critical patent/CN114163679A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0228—Aromatic vinyl resin, e.g. styrenic (co)polymers
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/06—CO2, N2 or noble gases
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/08—Supercritical fluid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene

Abstract

The invention discloses a micro-foaming diffusion plate, which belongs to the field of diffusion plates and comprises a light PS layer and two PS layers, wherein the two PS layers are respectively positioned at the top and the bottom of the light PS layer, the two light PS layers are compounded by a three-layer co-extrusion technology, and carbon dioxide bubbles are arranged in the light PS layer and the two PS layers. According to the invention, the specific gravity of the PS diffusion plate is reduced from 1.05g/cm3 to 0.85g/cm3 by a supercritical carbon dioxide micro-foaming technology. Thereby reduce material cost, because the refractive index difference of bubble core and substrate, the quantity of diffusant can effectively be reduced to same luminousness and thickness diffuser plate, further reduce cost, through carbon dioxide microfoaming, the bubble core particle diameter is little, and even, and is effectual to the diffusion of panel, can guarantee the optical effect of surface hardness and secondary diffusion through three-layer coextrusion technique, because the bubble core exists, there is tension in the diffuser plate internal material interfacial bubble, can improve the bending strength and the rigidity of panel.

Description

Micro-foaming diffusion plate
Technical Field
The invention relates to the field of diffusion plates, in particular to a micro-foaming diffusion plate.
Background
The most important characteristic of the diffuser plate is that the diffuser plate causes great interference to light, no matter how many degrees of the originally designed light distribution curve are, as long as the light passes through the diffuser plate, the light beam angle is 160-176 degrees, so when viewed from the side, the lamp plate surface has a fog feeling, from this point, the light beam angle is as large as 160-176 degrees, the best evidence proves that the larger the light beam angle is, the lower the illumination is, some light can be filtered, some wavelengths can not penetrate, color cast is caused, if the surface is subjected to light interference treatment again (such as frosting and pressing lines), the light transmittance is lower due to the natural phenomenon of geometrical optics, so the base material for making the diffuser plate should be selected to have the lower refractive index, and the lower the light interference is.
On the premise that the price of raw materials is increasing day by day, the material structure performance is changed, so that the material cost is effectively reduced, the mechanical strength and the optical performance can be improved, the market competitiveness is high, and the development direction of the backlight material in the future is shown.
Disclosure of Invention
The invention aims to provide a micro-foaming diffusion plate aiming at solving the problems of low economy and insufficient performance of the diffusion plate.
In order to solve the above problems, the present invention adopts the following technical solutions.
A micro-foaming diffusion plate comprises a light PS layer and two PS layers, wherein the two PS layers are respectively positioned at the top and the bottom of the light PS layer, the two light PS layers are compounded by a three-layer co-extrusion technology, and carbon dioxide bubbles are arranged in the light PS layer and the two PS layers.
As a further description of the above technical solution:
the light PS layer and the two PS layers are both made of polystyrene and are extruded and molded by an extruding machine; wherein the polystyrene is added with filler and special auxiliary agent.
As a further description of the above technical solution:
the proportion of the polystyrene, the filler and the special auxiliary agent is 10000: 1: 8.
as a further description of the above technical solution:
the light PS layer and the two PS layers form carbon dioxide bubbles by adopting a carbon dioxide micro-foaming technology, and the carbon dioxide micro-foaming technology comprises the following processes:
s1, injecting supercritical CO into the pressure container2Liquid, dissolving part of polystyrene raw material in supercritical CO2Obtaining supercritical CO from liquid2(ii) a melt-swollen PS liquid;
s2, extruding in the first section, mixing the residual polystyrene and the diffusion particle master batch, and extruding by a single screw to obtain a solution;
s3, extruding the second section, injecting supercritical CO through the injection hole after the solution enters the second section single screw rod2(ii) a melt-swollen PS liquid;
s4 solution mixed supercritical CO2Then slowly foaming in the screw, wherein the supercritical CO is precisely controlled2The amount of the filler (B) is controlled to control the foaming ratio of the intermediate layer.
As a further description of the above technical solution:
and (4) extruding the solution foamed in the step (S4) through different auxiliary screws simultaneously, extruding the plate through a three-layer in-mold co-extrusion die, and cooling to form the diffusion plate.
As a further description of the above technical solution:
the filler is rutile titanium dioxide.
As a further description of the above technical solution:
the special auxiliary agent is organic silicon micro powder.
Compared with the prior art, the invention has the advantages that:
(1) according to the scheme, the specific gravity of the PS diffusion plate is reduced from 1.05g/cm3 to 0.85g/cm3 through a supercritical carbon dioxide micro-foaming technology, so that the material cost is reduced.
(2) According to the scheme, due to the refractive index difference between the bubble core and the base material, the diffusion plate with the same light transmittance and thickness can effectively reduce the using amount of the diffusing agent, and the cost is further reduced.
(3) According to the scheme, the carbon dioxide micro-foaming is adopted, the particle size of the bubble core is small and uniform, and the diffusion effect on the plate is good
(4) According to the scheme, the optical effects of surface hardness and secondary diffusion can be guaranteed through a three-layer co-extrusion technology.
(5) According to the scheme, due to the existence of bubble nuclei, tension exists among bubbles on the interface of materials in the diffusion plate, and the bending strength and the rigidity of the plate can be improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic cross-sectional structure of the present invention.
The reference numbers in the figures illustrate:
1. a light PS layer; 2. a PS layer; 3. carbon dioxide bubbles.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention;
referring to fig. 1 and 2, in the present invention, a micro-foaming diffuser plate includes a light PS layer 1 and two PS layers 2, the two PS layers 2 are respectively located at the top and the bottom of the light PS layer 1, and the two light PS layers are formed by combining three-layer co-extrusion technology, wherein carbon dioxide bubbles 3 are respectively disposed in the light PS layer 1 and the two PS layers 2.
In the invention, the specific gravity of the diffusion plate is reduced from 1.05g/cm3 to 0.85g/cm 3. Thereby reduce material cost, because the refractive index difference of bubble nucleus and substrate, the quantity of diffusant can effectively be reduced to same luminousness and thickness diffuser plate, further reduce cost, bubble nucleus particle diameter is little, and even, and is effectual to the diffusion of panel, because bubble nucleus exists, there is tension in diffuser plate internal material interface bubble, can improve the bending strength and the rigidity of panel
Wherein: the light PS layer 1 and the two PS layers 2 are both made of polystyrene and are extruded and molded by an extruding machine; wherein the polystyrene is added with filler and special auxiliary agent.
In the invention, polystyrene is glossy and transparent particles, has the advantages of light weight, low price, low water absorption, good colorability, dimensional stability, good electrical property, transparent product and easy processing, and the physical property and the chemical property of the polystyrene are improved by adding the filler and the special auxiliary agent.
Wherein: the proportion of the polystyrene, the filler and the special auxiliary agent is 10000: 1: 8.
in the invention, the proportion is scientific, and the diffusion effect and the use stability of the diffusion plate are ensured.
Wherein: the light PS layer 1 and the two PS layers 2 form carbon dioxide bubbles 3 by adopting a carbon dioxide micro-foaming technology, and the carbon dioxide micro-foaming technology comprises the following processes:
s1, injecting supercritical CO into the pressure container2Liquid, dissolving part of polystyrene raw material in supercritical CO2Obtaining supercritical CO from liquid2(ii) a melt-swollen PS liquid;
s2, extruding in the first section, mixing the residual polystyrene and the diffusion particle master batch, and extruding by a single screw to obtain a solution;
s3, extruding the second section, injecting supercritical CO through the injection hole after the solution enters the second section single screw rod2(ii) a melt-swollen PS liquid;
s4 solution mixed supercritical CO2Then slowly foaming in the screw, wherein the supercritical CO is precisely controlled2The amount of the filler (B) is controlled to control the foaming ratio of the intermediate layer.
In the invention, the specific gravity of the PS diffusion plate is reduced from 1.05g/cm3 to 0.85g/cm3 by a supercritical carbon dioxide micro-foaming technology, so that the material cost is reduced.
Wherein: and (4) extruding the solution foamed in the step (S4) through different auxiliary screws simultaneously, extruding the plate through a three-layer in-mold co-extrusion die, and cooling to form the diffusion plate.
In the invention, the surface hardness and the optical effect of secondary diffusion of the diffusion plate can be ensured by a three-layer co-extrusion technology.
Wherein: the filler is rutile titanium dioxide.
In the invention, the strength, the anti-aging capability and the filling effect of the diffusion plate are improved by adding the rutile titanium dioxide.
Wherein: the special auxiliary agent is organic silicon micro powder.
In the invention, the density of the organic silicon micro powder is lower, and the light diffusion effect of the diffusion plate can be improved, and the production quality of the diffusion plate is improved.
The working principle is as follows: the specific gravity of the PS diffusion plate is reduced from 1.05g/cm3 to 0.85g/cm3 by a supercritical carbon dioxide micro-foaming technology. Thereby reduce material cost, because the refractive index difference of bubble core and substrate, the quantity of diffusant can effectively be reduced to same luminousness and thickness diffuser plate, further reduce cost, through carbon dioxide microfoaming, the bubble core particle diameter is little, and even, and is effectual to the diffusion of panel, can guarantee the optical effect of surface hardness and secondary diffusion through three-layer coextrusion technique, because the bubble core exists, there is tension in the diffuser plate internal material interfacial bubble, can improve the bending strength and the rigidity of panel.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims (7)

1. A micro-foaming diffusion plate is characterized in that: the composite material comprises a light PS layer (1) and two PS layers (2), wherein the two PS layers (2) are respectively positioned at the top and the bottom of the light PS layer (1), the two light PS layers are formed by compounding through a three-layer co-extrusion technology, and carbon dioxide bubbles (3) are arranged in the light PS layer (1) and the two PS layers (2).
2. A micro-foam diffuser plate as recited in claim 1, wherein: the light PS layer (1) and the two PS layers (2) are both made of polystyrene and are extruded and molded by an extruding machine; wherein the polystyrene is added with filler and special auxiliary agent.
3. A micro-foam diffuser plate as recited in claim 2, wherein: the proportion of the polystyrene, the filler and the special auxiliary agent is 10000: 1: 8.
4. a micro-foam diffuser plate as recited in claim 1, wherein: the light PS layer (1) and the two PS layers (2) both adopt a carbon dioxide micro-foaming technology to form carbon dioxide bubbles (3), and the carbon dioxide micro-foaming technology comprises the following processes:
s1, injecting supercritical CO into the pressure container2Liquid, dissolving part of polystyrene raw material in supercritical CO2Obtaining supercritical CO from liquid2(ii) a melt-swollen PS liquid;
s2, extruding in the first section, mixing the residual polystyrene and the diffusion particle master batch, and extruding by a single screw to obtain a solution;
s3, extruding the second section, injecting supercritical CO through the injection hole after the solution enters the second section single screw rod2(ii) a melt-swollen PS liquid;
s4 solution mixed supercritical CO2Then slowly foaming in the screw, wherein the supercritical CO is precisely controlled2The amount of the filler (B) is controlled to control the foaming ratio of the intermediate layer.
5. The micro-foam diffuser plate of claim 4, wherein: and (4) extruding the solution foamed in the step (S4) through different auxiliary screws simultaneously, extruding the plate through a three-layer in-mold co-extrusion die, and cooling to form the diffusion plate.
6. A micro-foam diffuser plate as recited in claim 2, wherein: the filler is rutile titanium dioxide.
7. A micro-foam diffuser plate as recited in claim 2, wherein: the special auxiliary agent is organic silicon micro powder.
CN202111397045.3A 2021-11-23 2021-11-23 Micro-foaming diffusion plate Pending CN114163679A (en)

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Application Number Priority Date Filing Date Title
CN202111397045.3A CN114163679A (en) 2021-11-23 2021-11-23 Micro-foaming diffusion plate

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Application Number Priority Date Filing Date Title
CN202111397045.3A CN114163679A (en) 2021-11-23 2021-11-23 Micro-foaming diffusion plate

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CN114163679A true CN114163679A (en) 2022-03-11

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007083549A (en) * 2005-09-22 2007-04-05 Mitsubishi Plastics Ind Ltd Perforated laminate and its manufacturing method
CN108638618A (en) * 2018-04-16 2018-10-12 江苏恒隆通新材料科技有限公司 A kind of expansion type diffuser plate and preparation method thereof
CN111439010A (en) * 2020-05-06 2020-07-24 南通创亿达新材料股份有限公司 Optical function board and preparation method thereof
CN112389057A (en) * 2020-10-28 2021-02-23 合肥华聚微科新材料有限责任公司 Novel optical diffusion material with multilayer composite microporous structure for flat panel display
CN112646282A (en) * 2020-12-03 2021-04-13 浙江碳景科技有限公司 Foaming light diffusion plate and preparation method and application thereof
CN214151118U (en) * 2021-01-22 2021-09-07 惠州市凯帝智光电科技有限公司 Foaming type multifunctional composite board

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007083549A (en) * 2005-09-22 2007-04-05 Mitsubishi Plastics Ind Ltd Perforated laminate and its manufacturing method
CN108638618A (en) * 2018-04-16 2018-10-12 江苏恒隆通新材料科技有限公司 A kind of expansion type diffuser plate and preparation method thereof
CN111439010A (en) * 2020-05-06 2020-07-24 南通创亿达新材料股份有限公司 Optical function board and preparation method thereof
CN112389057A (en) * 2020-10-28 2021-02-23 合肥华聚微科新材料有限责任公司 Novel optical diffusion material with multilayer composite microporous structure for flat panel display
CN112646282A (en) * 2020-12-03 2021-04-13 浙江碳景科技有限公司 Foaming light diffusion plate and preparation method and application thereof
CN214151118U (en) * 2021-01-22 2021-09-07 惠州市凯帝智光电科技有限公司 Foaming type multifunctional composite board

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Application publication date: 20220311