High smelting point, heat resistant and transparent polyethylene membrane

A technology of polyethylene film and high melting point, which is applied in the field of polyethylene film, can solve the problems of reducing the melting point of materials, reducing the crystallinity of polyolefin materials, and reducing the use temperature of materials, so as to improve creep resistance, enhance heat resistance, The effect of increasing crystallinity

Inactive Publication Date: 2018-11-06
CHANGZHOU HUITIAN NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the synergy of white EVA on components and the improvement of cell efficiency, the use temperature of the backsheet has increased. The heat resistance of traditional polyolefin materials is insufficient, and it is difficult to meet the requirements of continuous use of materials at high temperatures (80~95°C).
Polyethylene material has good thermal stability, but its melting point is low, melting occurs above 120°C
In order to improve the heat resistance of polyethylene materials, it is usually necessary to add some high-melting point PP for modification. However, PP materials have poor thermal stability and require high formulation design. In order to improve the heat resistance of PP, it i

Method used

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  • High smelting point, heat resistant and transparent polyethylene membrane
  • High smelting point, heat resistant and transparent polyethylene membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Examples:

[0042] Raw material grade quantity

[0043] Low-density polyethylene (LDPE) PE046 (produced by Spanish repsol company) 100

[0044] mPE 6040 (Total, France) 40

[0045] Ionomer resin 1065 (Dow DuPont) 20

[0046] Antioxidant 1010 1.2

[0047] Place the ionomer resin in a blast oven at 80°C and fully dry it for 24 hours. After the material is dry, add antioxidant 1010 in proportion, add 0.1% paraffin oil as the antioxidant auxiliary dispersant, and in the high-mix test machine , Stir at low speed for 3~5min to make the paraffin oil evenly distributed on the surface of the particles. After the antioxidant is uniformly adsorbed on the surface of the ionomer resin, it is put into the twin-screw extruder for granulation, and the extrusion temperature is controlled at 150~200℃. After the strip is out of the mold, water-cooled and pelletized to prepare the antioxidant masterbatch;

[0048] After drying the above-mentioned anti-oxidation masterbatch in a blast oven at 80℃ for...

Example

[0057] After manual corona for PV PET film with a thickness of 250μm, sample 1 and sample 2, make the surface dyne value> 52, and use commercially available PV polyurethane glue to manually apply glue to the PET film. Control the thickness of the glue to 8~10 Then, the glued PET and the corona-coated film samples 1 and 2 are composited. After the composite sample is allowed to stand at room temperature for 24 hours, it is then placed in an oven at 50°C and cured for two days to prepare backplane sample 1 (Example 1), backplane sample 2 (embodiment sample 2), test the peeling force between the backplane and the polyurethane glue;

[0058] 2. Production of laminate samples:

[0059] Stack photovoltaic glass, high-transmittance EVA (Foster F806), ultraviolet high-cut EVA (Foster F406), and back sheet samples (back sheet sample 1, back sheet sample 2) and place them in the laminate to make Laminate sample 1, laminate sample 2 (see Table 1 for lamination parameters), test the peeling f...

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Abstract

The invention relates to the technical field of polyethylene membranes, and particularly relates to a high smelting point, heat resistant and transparent polyethylene membrane. The high smelting point, heat resistant and transparent polyethylene membrane comprises the components of main resin, auxiliary resin, ionomer resin and an antioxidant. According to the high smelting point, heat resistant and transparent polyethylene membrane, an ionomer is utilized for crosslinking, and metal ions in the ionomer and a chain section of a polymer act on each other, the chain section of the polymer is limited to move, and a physical crosslinking point is formed, and the creep resistance of the polymer is improved; moreover, the polyethylene material is promoted to crystal through the ionomer, so thatthe crystallizing degree is improved; the heat resistance of the material is improved; a high heat resisting formula is adopted; the ionomer is used to crosslink, so that that smelting point and the softening temperature of the polyethylene material are increased; compared with other type of polyethylene membranes, the polyethylene glue membrane is simple in formula, outstanding in heat resistance, high in adhering intensity relative to EVA, and particularly high in matching performance with white EVA.

Description

technical field [0001] The invention relates to a polyethylene film, in particular to a heat-resistant transparent polyethylene film with a high melting point. Background technique [0002] The solar cell module is composed of 5-layer structure, photovoltaic glass, high-transparency EVA, battery sheet, high-ultraviolet high-blocking EVA, and photovoltaic backplane; the photovoltaic backplane is used as the packaging material for the backplane of the module, which mainly plays the role of insulation, water vapor barrier, and increased reflection. . [0003] Conventional solar backsheets are composed of multiple layers of materials. Taking the most common composite KPE backsheet on the market as an example, its structure is three layers, the outermost layer (the air contact surface of the backsheet) is PVDF, the middle layer is PET, and The layer material (EVA adhesive layer) is a modified polyolefin film. Since the inner layer material of the backsheet is in direct contact ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/12C08J5/18C08J3/22
CPCC08J3/226C08J5/18C08J2323/06C08J2423/06C08J2423/08
Inventor 张宪哲何甜甜石娜姚元毅
Owner CHANGZHOU HUITIAN NEW MATERIALS
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