A kind of polyolefin film, preparation method and solar battery backplane

A polyolefin film, polyolefin technology, applied in the field of film, can solve the problems of complex process, limited effect, affecting the adhesion of polyolefin materials, etc.

Active Publication Date: 2021-09-14
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN104868003A discloses a technical scheme in which metal layers such as aluminum foil, iron foil, tin foil, and zinc foil are arranged in the backplane as a barrier layer. The good barrier properties of metal materials are used to improve the water vapor barrier properties of the backplane, which greatly The water vapor transmission rate is reduced, but the cost is high, and the insulation performance of the backplane is greatly reduced
Chinese patent CN106903959A adds inorganic fillers such as nano-montmorillonite and mica flakes to the substrate used to improve the water vapor barrier of the backsheet, but the effect is limited and the process is complicated, which is not conducive to mass application
For example, Chinese patent CN106867239A prepared a polar polymer / phosphate glass composite material for improving the oxygen resistance and toughness of polyolefin materials, but there are the following deficiencies: first, inorganic tin-fluorophosphate glass has not After surface modification, it has poor compatibility with organic polymers, resulting in poor dispersion; secondly, polar polymer masterbatches have poor compatibility with non-polar polyolefin materials, and it is difficult to process them for modified polyolefin materials; thirdly, it is necessary to Using a special layer multiplier, this equipment is not a conventional polymer processing equipment, expensive, not conducive to popularization and application; finally, the filling of inorganic tin-fluorophosphate materials will inevitably affect the adhesion of polyolefin materials, which is not satisfactory as a photovoltaic Application Requirements for Backsheet Materials

Method used

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  • A kind of polyolefin film, preparation method and solar battery backplane
  • A kind of polyolefin film, preparation method and solar battery backplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] i) Select low-density polyethylene (LDPE), phosphate glass powder treated with silane, and PE-MAH as raw materials, and vacuum-dry in an oven at 85° C. for 24 hours to remove adsorbed moisture.

[0044] ii) Granulation: Weigh 100kg PE-MAH and 100kg phosphate glass powder respectively, mix them uniformly and add them into a twin-screw extruder for melt blending, cool and pelletize after extrusion to obtain PE-MAH / phosphate Glass masterbatch. The temperature in each zone of the extruder was 220°C.

[0045] iii) Co-extrusion: Take 50kg of the masterbatch obtained in step (i) and mix it evenly with 50kg of polyethylene slices, add A-layer extruder to extrude the middle layer of polyolefin film; 89kg of polyethylene slices, 2kg of anti-hydrolysis agent , 3kg of UV absorber, 1kg of light stabilizer, and 5kg of titanium dioxide are mixed evenly, and added to the B-layer extruder to extrude the polyolefin layer arranged on both sides;

[0046] iv) Cast sheet and biaxial stret...

Embodiment 2

[0051] i) Use polypropylene (PP), phosphate glass powder treated with silane, and PP-MAH as raw materials, and vacuum-dry in an oven at 85° C. for 24 hours to remove adsorbed moisture.

[0052] ii) Granulation: Weigh 400kg PE-MAH and 100kg phosphate glass powder respectively, mix them evenly and add them into a twin-screw extruder for melt blending, cool and pelletize after extrusion to obtain PE-MAH / phosphate Glass masterbatch. The temperature in each zone of the extruder was 220°C.

[0053] iii) Co-extrusion: Take 90kg of the masterbatch obtained in step (i) and mix it with 10kg polyethylene slices evenly, and add it to the A-layer extruder to extrude the middle layer of polyolefin film; 97kg polyethylene slices, 0.2kg anti-hydrolysis agent, 0.5kg UV absorber, 0.5kg light stabilizer, and 0.5kg titanium dioxide are mixed evenly, and added to the B-layer extruder to extrude the polyolefin layer arranged on both sides;

[0054] iv) Cast sheet and biaxial stretching: the three...

Embodiment 3

[0059] i) Use polypropylene (PP), phosphate glass powder treated with silane, and PP-MAH as raw materials, and vacuum-dry in an oven at 85° C. for 24 hours to remove adsorbed moisture.

[0060] ii) Granulation: Weigh 200kg PE-MAH and 100kg phosphate glass powder respectively, mix them uniformly and add them into a twin-screw extruder for melt blending, cool and pelletize after extrusion to obtain PE-MAH / phosphate Glass masterbatch. The temperature in each zone of the extruder was 220°C.

[0061] iii) Co-extrusion: Take 45kg of the masterbatch obtained in step (i) and mix it evenly with 10kg of polyethylene slices, and add it to the A-layer extruder to extrude the middle layer of polyolefin film; 93kg of polyethylene slices, 1.1kg of anti-hydrolysis Agent, 1.75kg UV absorber, 0.75kg light stabilizer, 3.4kg titanium dioxide are mixed evenly, and added to the B-layer extruder to extrude the polyolefin layer arranged on both sides;

[0062] iv) Cast sheet and biaxial stretching:...

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Abstract

The invention relates to a polyolefin film, a preparation method and a solar cell backboard. The polyolefin film is an ABA three-layer structure, wherein the B layer is made of the following components by weight: phosphate glass 5‑20, polyolefin 50‑90, compatibilizer 5‑20. Due to the addition of tungsten-tin-fluorophosphate glass filler in the present invention, its sheet structure can effectively block the penetration of harmful gases such as water vapor and oxygen, so that the barrier performance of the made back sheet is significantly improved, the compatibility of the system is good, and the It improves the processing performance and can meet the all-weather application requirements of photovoltaic backplanes.

Description

technical field [0001] The invention relates to the field of film technology, in particular to a polyolefin film. Background technique [0002] As an important packaging material for photovoltaic modules, solar cell backsheets have water and oxygen resistance that directly affect the safety, durability, and power generation efficiency of the modules; especially when used in high-humidity environments such as fishing and light complementarity, water vapor and oxygen are easy to pass through The backsheet penetrates into the interior of the module, causing delamination due to the failure of the adhesive film package during long-term operation, which causes erosion of the cells and ribbons, thereby seriously reducing the power generation efficiency and service life of the photovoltaic module. Therefore, in order to further expand the application range of photovoltaic modules, it is urgent to improve the barrier properties of the backsheet. [0003] At present, the technical so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B27/20B32B27/06B32B7/12B32B7/02H01L31/048H01L31/049C08J5/18C08L23/06C08L23/12C08L51/06C08K9/06C08K3/32B29C69/02B29C48/08B29C48/16B29C55/12B29B9/06
CPCB29B9/06B32B7/02B32B7/12B32B27/08B32B27/20B32B27/32B32B2307/7244B32B2307/7246B32B2457/10B32B2457/12B29C48/0018B29C48/08B29C48/18C08J5/18C08J2323/06C08J2323/12C08J2451/06C08K9/06C08K2003/321H01L31/0481H01L31/049Y02E10/50
Inventor 司朋飞赫茂垒梁宏陆邸喜强田勇董丽荣张伊玮景改峰
Owner 乐凯胶片股份有限公司
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