CN114656708A - Polymer sheet and preparation method and application thereof - Google Patents

Polymer sheet and preparation method and application thereof Download PDF

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CN114656708A
CN114656708A CN202210226797.1A CN202210226797A CN114656708A CN 114656708 A CN114656708 A CN 114656708A CN 202210226797 A CN202210226797 A CN 202210226797A CN 114656708 A CN114656708 A CN 114656708A
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transparent
polymer
polymer sheet
transparent organic
organic microparticles
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CN114656708B (en
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姜文
赵振虎
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Jiangsu Yongxin Material Technology Co ltd
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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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
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    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
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    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
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    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
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    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2425/00—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
    • C08J2425/02—Homopolymers or copolymers of hydrocarbons
    • C08J2425/04—Homopolymers or copolymers of styrene
    • C08J2425/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
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    • C08J2433/00—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/04—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2433/06—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2433/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2433/12—Homopolymers or copolymers of methyl methacrylate
    • 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
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2483/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C08K5/134—Phenols containing ester groups
    • C08K5/1345—Carboxylic esters of phenolcarboxylic acids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The invention provides a polymer sheet, a preparation method and application thereof, wherein the polymer sheet comprises a transparent polymer and transparent organic microparticles, and the mass ratio of the transparent polymer to the transparent organic microparticles is 1: 0.01 to 0.5. In addition, the selected transparent organic micron particles and the selected transparent polymer have proper refractive index difference, and the polymer sheet disclosed by the invention has high light transmittance, so that the light transmittance of agricultural greenhouse films, photovoltaic cell panel packaging films, transparent photovoltaic back plates and the like can be improved, the light loss is reduced, and the light application efficiency is improved.

Description

Polymer sheet and preparation method and application thereof
Technical Field
The invention relates to the field of optics, in particular to a polymer sheet and a preparation method and application thereof.
Background
The agricultural plastic greenhouse can reduce heat loss while irradiating sunlight to plants in the greenhouse, so that the temperature in the greenhouse is increased, the growth of crops is facilitated, the contribution to agricultural production is huge, and the problem of effective supply of crops such as vegetables, flowers and the like in low-temperature areas or winter is particularly solved. However, when sunlight passes through plastic greenhouse films (mostly made of PE and EVA), the light transmittance is always reduced, which causes loss of sunlight energy, and the solar energy cannot be utilized most sufficiently.
The photovoltaic cell panel is formed by bonding and fixing toughened glass and a cell piece, the cell piece and a back plate by using EVA and POE (ethylene vinyl acetate elastomer), and is generally called as packaging in the industry. The sunlight can irradiate the power generation main body-cell piece to generate power through the EVA and POE layers after passing through the glass, and the influence of the EVA and POE layers on the light transmittance can also cause the loss of solar energy.
The photovoltaic backboard has the functions of sealing, insulating, waterproofing and the like, in recent years, in order to utilize reflected sunlight on the back of the solar electromagnetic plate, the transparent backboard begins to appear, the transparent photovoltaic backboard made of materials such as PET double-sided fluorine coating, PET/fluorine film compounding, PP, EVA compounding and the like gradually becomes the market mainstream, but the light transmittance of the transparent backboard is required to be improved, and the influence on the photoelectric conversion efficiency of the solar panel is obvious.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a polymer sheet having higher light transmittance, a method for producing the same, and use thereof.
To achieve the above objects and other related objects, the present invention is achieved by the following technical solutions.
The first aspect of the present invention provides a polymer sheet, which comprises a transparent polymer and transparent organic microparticles, wherein the transparent organic microparticles are present in a mass ratio of 1: 0.01-0.5, and the preferable mass ratio is 1: 0.01 to 0.1.
In a second aspect, the present invention provides a method for preparing a polymer sheet, comprising the steps of: s1, mixing the components in a mass ratio of 1: 0.01-0.5: 0-0.01: 0-0.01 providing a transparent polymer, transparent organic microparticles, a light stabilizer and an antioxidant; s2, preparing master batches from the transparent organic micron particles, the light stabilizer, the antioxidant and the partially transparent polymer mixture; and S3, mixing the master batch in the S2 with the residual transparent polymer, and preparing the polymer sheet.
The third aspect of the invention provides the use of the polymer sheet in agricultural greenhouse cultivation, and/or the use of the polymer sheet in photovoltaic EVA, POE adhesive films, and/or the use of the polymer sheet on photovoltaic transparent back sheets.
Drawings
FIG. 1 is a schematic diagram showing the structure of a polymer flake added with transparent organic microparticles according to the present invention
Wherein the reference numerals in figure 1 are as follows:
1 is a transparent polymer
2 is a transparent organic microparticle
Detailed Description
The inventor of the invention finds out through a large number of experiments that: transparent organic microparticles with different refractive indexes and specific proportion and specific particle size are added into a transparent polymer, and a pure polymer sheet with the light transmittance higher than that of the same thickness and without the transparent organic microparticles with different refractive indexes is prepared. On the basis of this, the present invention has been completed.
The first aspect of the present invention provides a polymer sheet, which includes a transparent polymer and transparent organic microparticles, wherein the mass ratio of the transparent polymer to the transparent organic microparticles is 1: 0.01-0.5, and the preferable mass ratio is 1: 0.01-0.1, optionally 1: 0.01-0.06, 1: 0.0.6-0.1, 1: 0.1-0.2, 1: 0.2 to 0.5. Or the mass of the transparent organic microparticles is not more than 50 wt% of the mass of the transparent polymer, preferably, the addition amount of the transparent organic microparticles is not more than 10 wt% of the mass of the transparent polymer, and more addition amount easily causes increase of cost and change of mechanical properties of the sheet.
The transparent polymer is a polymer for conventional film making, and generally comprises one or more of PE (polyethylene), PP (polypropylene) and EVA (ethylene-vinyl acetate copolymer) PET (polyethylene terephthalate).
In a preferred embodiment, the transparent organic microparticles are uniformly distributed in the transparent polymer, the transparent organic microparticles are spherical, preferably regular spherical, the regular spherical transparent organic microparticles are easy to synthesize, and secondly, after the particles are freely distributed in the polymer, only one point facing to the light source generates total reflection light theoretically, and the influence on the light transmittance is minimized. Meanwhile, the regular spherical particles have high fluidity and are easy to disperse. In the case of other shapes, such as a cube, a reflection surface facing the light source inevitably appears after being freely distributed in the polymer, resulting in a decrease in light transmittance.
In a preferred embodiment, the average particle size of the transparent organic microparticles is 2 to 50 μm, and the preferred average particle size of the transparent organic microparticles is 2 to 40 μm.
In a preferred embodiment, the ratio of the refractive index of the transparent polymer to the transparent organic microparticles is 1: 0.8 to 1.
In a preferred embodiment, the refractive index of the transparent polymer is 1.40-1.60, and preferably, the refractive index of the transparent polymer is 1.45-1.59.
In a preferred embodiment, the refractive index of the transparent organic microparticles is 1.40-1.59, the refractive index of the transparent organic microparticles is suitably different from the refractive index of the transparent polymer, and the transmittance is improved by adding the transparent microparticles with different refractive indexes into the transparent polymer as described in reference to the embodiment.
In a preferred embodiment, the transparent organic microparticles are preferably made of one or more of polysiloxane, Polymethylmethacrylate (PMMA), polyethylene terephthalate (PET), polyethylene terephthalate-1, 4-cyclohexanedimethanol ester (PETG), Polycarbonate (PC), polyamide resin (PA), Polystyrene (PS), styrene-acrylonitrile copolymer (SAN).
In a specific embodiment, the transparent organic microparticles are made of polysiloxane and have a refractive index of 1.40-1.43, the transparent organic microparticles are made of polycarbonate and have a refractive index of 1.585, the transparent organic microparticles are made of polystyrene and have a refractive index of 1.585, the transparent organic microparticles are made of polyethylene terephthalate-1, 4-cyclohexanedimethanol terephthalate and have a refractive index of 1.57, and the transparent organic microparticles are made of styrene-acrylonitrile copolymer and have a refractive index of 1.57.
In a preferred embodiment, the polymer sheet further comprises a light stabilizer and/or an antioxidant. The proportion of the light stabilizer and the antioxidant can be compounded according to the requirement.
In a preferred embodiment, the mass ratio of the transparent polymer, the light stabilizer and the antioxidant is 1: 0-0.01: 0-0.01, preferably, the sum of the addition amounts of the light stabilizer and the antioxidant does not exceed 1 wt% of the mass of the transparent polymer.
In a preferred embodiment, each of the light stabilizers and/or antioxidants is independently selected from at least one of hindered amines, hindered phenols, or phosphites, or is compounded. For example, 944, 783, 788, 622, 362, 360, 119 and XT100, T68, T69 etc. can be used as hindered amine, and B215, B225, B900, 1076, 1010, 168 etc. can be used as antioxidant.
The second aspect of the present invention provides a method for producing the above polymer sheet: s1, dividing the transparent polymer into a first part of transparent polymer and a second part of transparent polymer, mixing the transparent organic micron particles, the light stabilizer, the antioxidant and the first part of transparent polymer according to a ratio to obtain master batches, and specifically, extruding the master batches through a screw extruder;
s2, mixing the master batch in the S1 with a second part of transparent polymer, and preparing the polymer sheet, specifically preparing the polymer sheet by using film preparing equipment. Uniformly mixing a part of transparent polymer and transparent organic micron particles, and jointly extruding to form master batches; the film is then formed into a polymer sheet in such a way that the transparent organic microparticles are uniformly distributed in the polymer sheet ultimately formed from the transparent polymer.
In a preferred embodiment, in the step S1, the mass ratio of the first partially transparent polymer to the second partially transparent polymer is 0.1 to 0.5: 1, optionally 0.1-0.2: 1, 0.2-0.3: 1, 0.3-0.4: 1, 0.4-0.5: 1.
the third aspect of the invention provides the application of the polymer sheet or the polymer sheet prepared by the preparation method in agricultural greenhouse planting, and/or the application of the polymer sheet in photovoltaic EVA and POE adhesive films, and/or the application of the polymer sheet on photovoltaic transparent back plates.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not noted in the following examples are generally performed under conventional conditions or conditions recommended by each manufacturer.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition to the specific methods, devices, and materials used in the examples, any methods, devices, and materials similar or equivalent to those described in the examples may be used in the practice of the invention in addition to the specific methods, devices, and materials used in the examples, in keeping with the knowledge of one skilled in the art and with the description of the invention.
Example 1
The embodiment discloses a polymer sheet with the thickness of 80 mu m, and the polymer sheet comprises the following components in percentage by mass:
Figure BDA0003539556210000041
the polyethylene is a film grade high-transparency polyethylene grade: 2420D, manufactured by Zhonghai oil shell, Inc., refractive index 1.45; the transparent organic microparticles are made of polysiloxane (specifically organic elastomer) with the average particle size of 3.0 μm, and are produced by the Dow chemical company, and the trade name is as follows: DOWSILTMEP-5500, refractive index 1.41.
The specific manufacturing method comprises the following steps: firstly, 2.5 portions of transparent organic micron particles DOWSILTMEP-5500, 25 parts of film-grade high-transparency polyethylene 2420D, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010 are uniformly mixed and prepared into master batches by a screw extruder, then the master batches are added into the rest 72 parts of film-grade high-transparency polyethylene and uniformly mixed, and a film with the content of transparent organic micron particles of 2.5 percent and the thickness of 80 microns is prepared by film-making equipment.
Example 2
The embodiment discloses a polymer sheet with the thickness of 100 micrometers, which comprises the following components in percentage by mass:
Figure BDA0003539556210000042
the EVA (ethylene-vinyl acetate copolymer) is a film-grade high-transparency EVA with the following mark: 3130, manufactured by DuPont, USA, refractive index 1.48; the transparent organic micron particles are made of PMMA material with the average particle size of 15 microns, are products of Suzhou comprehensive research company, and are provided with the trade names: MX-1500H, refractive index 1.49.
The specific manufacturing method comprises the following steps: uniformly mixing 5.0 parts of transparent organic micron particles MX-1500H with 30 parts of EVA resin, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, extruding by a screw extruder to obtain master batches, adding the master batches into the remaining 64.5 parts of EVA resin, uniformly mixing, and preparing a film with the content of the transparent organic micron particles of 5.0 wt% and the thickness of 100 microns by using film-making equipment.
Example 3
The embodiment discloses a polymer sheet with the thickness of 80 microns, which comprises the following components in percentage by weight:
Figure BDA0003539556210000051
the polypropylene is homopolymerized polypropylene, and the mark is as follows: s1003, manufactured by petrochemical engineering Limited liability company of Shanghai Seikeke, and has a refractive index of 1.49; the organic spherical microparticles are made of polysiloxane with the average particle size of 20 microns, are products of Yongqi materials technology (Shanghai) Limited company and are provided with the following brands:
Figure BDA0003539556210000052
HL620, refractive index 1.41.
The specific manufacturing method comprises the following steps: firstly, 3 parts of transparent organic micron particles
Figure BDA0003539556210000053
HL620, 20 parts of polypropylene S1003, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, uniformly mixing the mixture, extruding the mixture through a screw extruder to obtain master batches, adding the master batches into the rest 66.5 parts of polypropylene, uniformly mixing, and preparing a polymer sheet with the content of transparent organic micron particles of 3 percent and the thickness of 80 microns through film preparation equipment.
Example 4
The embodiment discloses a polymer sheet with the thickness of 70 micrometers, which comprises the following components in percentage by weight:
Figure BDA0003539556210000054
the polyethylene is a film-grade high-transparency polyethylene grade: 2420D, manufactured by Zhonghai oil shell, Inc., refractive index 1.45; the organic spherical transparent organic microparticles are made of polystyrene with the average particle size of 3.0 microns, are products of Nanjing Jielansi New Material Co., Ltd, and are provided with the trade names: JNS-PC02-3.0, refractive index 1.585.
The specific manufacturing method comprises the following steps: uniformly mixing 3.0 parts of transparent organic micron particle JNS-PC02-3.0, 20 parts of film-grade high-transparency polyethylene, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, extruding the mixture by a screw extruder to prepare master batches, adding the master batches into the rest 66.5 parts of film-grade high-transparency polyethylene, uniformly mixing, and preparing a polymer sheet with the content of the transparent organic micron particles of 3.0 percent and the thickness of 70 microns by film-making equipment.
Example 5
The embodiment discloses a polymer sheet with the thickness of 90 microns, which comprises the following components in percentage by weight:
Figure BDA0003539556210000061
the EVA (ethylene-vinyl acetate copolymer) is a film-grade high-transparency EVA mark: 3130, manufactured by DuPont, USA, refractive index 1.48; the polyethylene is a film-grade high-transparency polyethylene grade: 2420D, manufactured by Zhonghai oil shell, Inc., refractive index 1.45. The transparent organic microparticles are made of polysiloxane with an average particle size of 30.0 microns, and are manufactured by Yongqi materials technology (Shanghai) company Limited, and the trade name is as follows:
Figure BDA0003539556210000062
HL630, refractive index of 1.41.
The specific manufacturing method comprises the following steps: firstly, 4 parts of transparent organic micron particles
Figure BDA0003539556210000063
HL630 and 18 parts of film-grade high-transparency polyethylene 2420D are uniformly mixed and extruded by a screw extruder to prepare master batches, and then the master batches are added into the rest 50 parts of film-grade high-transparency polyethyleneAnd 37.5 parts of EVA (ethylene-vinyl acetate copolymer) are uniformly mixed, and a polymer sheet with the content of organic spherical transparent organic micron particles of 4.0 percent and the thickness of 90 microns is manufactured through film making equipment.
Comparative example 1
This comparative example discloses a polymer sheet having a thickness of 80 microns, the polymer sheet having the following composition and proportions:
polyethylene: 99.5 parts
Light stabilizer 788: 0.4 part
Antioxidant 1010: 0.1 part of
The polyethylene is a film-grade high-transparency polyethylene grade: 2420D, manufactured by Zhonghai oil shell, Inc., refractive index 1.45;
the specific manufacturing method comprises the following steps: firstly, uniformly mixing 25 parts of polyethylene, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, extruding the mixture by a screw extruder to prepare master batches, then adding the master batches into the rest of the thin-film-grade high-transparency polyethylene, uniformly mixing, and preparing a polymer sheet with the thickness of 80 microns by using film-making equipment.
Comparative example 2
The embodiment discloses a polymer sheet with the thickness of 100 micrometers, which comprises the following components in percentage by weight:
EVA: 99.5 parts of
Light stabilizer 788: 0.4 part
Antioxidant 1010: 0.1 part
The EVA (ethylene-vinyl acetate copolymer) is a film-grade high-transparency EVA with the following mark: 3130, manufactured by DuPont, USA, with a refractive index of 1.48.
The specific manufacturing method comprises the following steps: uniformly mixing 30 parts of EVA resin, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, extruding the mixture by a screw extruder to obtain master batches, adding the master batches into the rest 69.5 parts of EVA resin, uniformly mixing, and manufacturing a film with the thickness of 100 microns by film-making equipment.
Comparative example 3
The embodiment discloses a polymer sheet with the thickness of 80 microns, which comprises the following components in percentage by weight:
polypropylene: 99.5 parts
Light stabilizer 788: 0.4 part
Antioxidant 1010: 0.1 part of
The polypropylene is homopolymerized polypropylene, and the mark is as follows: s1003, manufactured by Shanghai Seikeke petrochemical Limited liability company, refractive index 1.49.
The specific preparation method comprises the following steps: firstly, uniformly mixing 20 parts of polypropylene S1003, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, extruding the mixture by using a screw extruder to obtain master batches, then adding the master batches into the remaining 79.5 parts of polypropylene, uniformly mixing, and preparing a polymer sheet with the thickness of 80 microns by using film-making equipment.
Comparative example 4
The embodiment discloses a polymer sheet with the thickness of 70 micrometers, which comprises the following components in percentage by weight:
polyethylene: 99.5 parts
Light stabilizer 788: 0.4 part
Antioxidant 1010: 0.1 part of
The polyethylene is a film-grade high-transparency polyethylene grade: 2420D, manufactured by Zhonghai oil shell, Inc., refractive index 1.45.
The specific manufacturing method comprises the following steps: firstly, uniformly mixing 20 parts of film-grade high-transparency polyethylene, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010, extruding the mixture by a screw extruder to prepare master batches, then adding the master batches into the residual 79.5 parts of film-grade high-transparency polyethylene, uniformly mixing, and preparing a polymer sheet with the thickness of 70 microns by using film-making equipment.
Comparative example 5
The embodiment discloses a polymer sheet with the thickness of 90 microns, which comprises the following components in percentage by weight:
Figure BDA0003539556210000081
the EVA (ethylene-vinyl acetate copolymer) is a film grade high-transparency EVA mark: 3130, manufactured by DuPont, USA, refractive index 1.48; the polyethylene is a film-grade high-transparency polyethylene grade: 2420D, manufactured by Zhonghai oil shell, Inc., refractive index 1.45.
The specific manufacturing method comprises the following steps: firstly, 18 parts of film-grade high-transparency polyethylene 2420D, 0.4 part of light stabilizer 788 and 0.1 part of antioxidant 1010 are uniformly mixed and extruded by a screw extruder to prepare master batches, then the master batches are added into the remaining 52.85 parts of film-grade high-transparency polyethylene and 28.65 parts of EVA for uniform mixing, and a polymer sheet with the thickness of 90 microns is prepared by film-making equipment.
Table 1 shows the light transmittance of the transparent organic microparticle-containing flakes of examples 1-5 compared to the same thickness of non-microparticle flakes.
Figure BDA0003539556210000082
As is evident from table 1 above: compared with polymer sheets with the same thickness and the same material, the light transmittance of the polymer sheet containing the transparent organic microparticles formed in the technical scheme disclosed by the application is obviously improved.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (9)

1. A polymer sheet comprising a transparent polymer and transparent organic microparticles;
the mass ratio of the transparent polymer to the transparent organic microparticles is 1: 0.01-0.5, and the preferable mass ratio is 1: 0.01 to 0.1.
2. The polymer flake of claim 1, wherein the transparent organic microparticles have a particle size of 2.0 to 50 μm;
and/or, the transparent organic microparticles are spherical;
and/or, the transparent organic microparticles are uniformly distributed in the transparent polymer.
3. The polymer sheet according to claim 1, wherein the ratio of refractive index of the transparent polymer to the transparent organic microparticles is 1: 0.8 to 1;
and/or the refractive index of the transparent polymer is 1.40-1.60;
and/or the refractive index of the transparent organic microparticles is 1.40-1.59.
4. The polymer sheet according to claim 1, wherein the transparent polymer is made of one or more of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, or polyethylene terephthalate;
and/or the transparent organic microparticles are prepared from one or more of polysiloxane, polymethyl methacrylate, polyethylene terephthalate 1, 4-cyclohexanedimethanol ester, polycarbonate, transparent polyamide resin, polystyrene and styrene-acrylonitrile copolymer.
5. Polymer sheet according to any of claims 1 to 4, wherein said polymer sheet further comprises light stabilizers and/or antioxidants.
6. The polymer sheet according to claim 5, wherein the transparent polymer, the light stabilizer and the antioxidant are present in a mass ratio of 1: 0-0.01: 0 to 0.01;
and/or, the light stabilizer and/or antioxidant are each independently selected from at least one of hindered amine, hindered phenol, or phosphite.
7. Process for the preparation of a polymer sheet according to any of claims 1 to 6, comprising the steps of:
s1, dividing the transparent polymer into a first part of transparent polymer and a second part of transparent polymer, and mixing the transparent organic micron particles, the light stabilizer, the antioxidant and the first part of transparent polymer according to the proportion to obtain master batches;
and S2, mixing the master batch in the S1 with a second part of transparent polymer, and preparing a polymer sheet.
8. The method for producing a polymer sheet according to claim 7, wherein in the step S1, the mass ratio of the first partially transparent polymer to the second partially transparent polymer is 0.1 to 0.5: 1.
9. use of the polymer sheet according to any one of claims 1 to 6 in agricultural greenhouse cultivation, and/or use of the polymer sheet in photovoltaic EVA, POE adhesive films, and/or use of the polymer sheet on photovoltaic transparent back sheets.
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Citations (1)

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Publication number Priority date Publication date Assignee Title
CN108570178A (en) * 2018-04-12 2018-09-25 涌奇材料技术（上海）有限公司 A kind of diffusing scattering film and its preparation method and application

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108570178A (en) * 2018-04-12 2018-09-25 涌奇材料技术（上海）有限公司 A kind of diffusing scattering film and its preparation method and application

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