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Flexible packaging composite film for solar cell backboard film and preparation method

A solar cell, flexible packaging technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of acid and alkali resistance, poor water resistance, etc., and achieve the effect of high hinge characteristics, high impact resistance, and excellent moisture resistance.

Inactive Publication Date: 2021-09-24
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the polyurethane material has good elasticity, it is easy to degrade and has poor water resistance. It will be hydrolyzed when it interacts with water for a long time, and it is not resistant to acid and alkali. Therefore, it is necessary to modify the polyurethane film to overcome the technical defects of the polyurethane film.

Method used

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  • Flexible packaging composite film for solar cell backboard film and preparation method
  • Flexible packaging composite film for solar cell backboard film and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a flexible packaging composite film, comprising the steps of:

[0031] (1) Weighing: Weigh according to the following raw material composition in parts by weight: 20 parts of hexamethylene diisocyanate; 16 parts of ethylene glycol; 1 part of graphene oxide, set aside;

[0032] (2) Preparation of polyurethane prepolymer: mix hexamethylene diisocyanate, catalyst dibutyltin dilauric acid and ethylene glycol, react at 75°C for 2 hours, stop heating and cool to room temperature, wash with ethanol and water After obtaining the polyurethane prepolymer;

[0033] (3) Preparation of flexible bottom film: mix the polyurethane prepolymer prepared in step (2) with graphene oxide, then heat and reflux at 80°C for 6h, stop heating, cast to form a film, and obtain a flexible bottom film after drying ;

[0034] (4) Preparation of flexible packaging composite film: use atomic layer deposition equipment to deposit an inorganic interlayer film on the surface of the...

Embodiment 2

[0036] A method for preparing a flexible packaging composite film, comprising the steps of:

[0037] (1) Weighing: Weigh according to the following raw material compositions in parts by weight: 25 parts of tetramethylene diisocyanate; 14 parts of pentylene glycol; 2 parts of graphene oxide, set aside;

[0038] (2) Preparation of polyurethane prepolymer: After mixing tetramethylene diisocyanate, catalyst dibutyltin dilauric acid and pentylene glycol, react at 85°C for 1.5h, stop heating and cool to room temperature, wash with ethanol, Obtain polyurethane prepolymer after washing with water;

[0039] (3) Preparation of flexible base film: mix the polyurethane prepolymer prepared in step (2) with graphene oxide, then heat and reflux at 100°C for 4.5 hours, stop heating, cast a film, and obtain a flexible base after drying membrane;

[0040] (4) Preparation of flexible packaging composite film: use atomic layer deposition equipment to deposit an inorganic interlayer film on the ...

Embodiment 3

[0042] A method for preparing a flexible packaging composite film, comprising the steps of:

[0043] (1) Weighing: Weighing according to the raw material composition of following parts by weight: 30 parts of isophorone diisocyanate; 12 parts of glycerol; 3 parts of graphene oxide, set aside;

[0044] (2) Preparation of polyurethane prepolymer: After mixing isophorone diisocyanate, catalyst dibutyltin dilauric acid and glycerin, react at 90°C for 1 hour, stop heating and cool to room temperature, After washing with ethanol and washing with water, a polyurethane prepolymer is obtained;

[0045] (3) Preparation of flexible bottom film: mix the polyurethane prepolymer prepared in step (2) with graphene oxide, then heat and reflux at 120°C for 3 hours, stop heating, cast to form a film, and obtain a flexible bottom film after drying ;

[0046](4) Preparation of flexible packaging composite film: use atomic layer deposition equipment to deposit an inorganic interlayer film on the ...

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Abstract

The invention relates to a flexible packaging composite film for a solar cell backboard film and a preparation method, the flexible packaging composite film comprises an outer protective film, an inorganic intermediate film and a flexible bottom film which are sequentially stacked from top to bottom, and the flexible bottom film is prepared from the following raw materials in parts by weight: 20-30 parts of diisobutyronitrile; 12 to 16 parts of polyol; and 1-3 parts of graphene oxide. The composite film is prepared by adopting an organic layer-inorganic layer-organic layer laminating mode, the outer protection film is used for outer layer protection, the inorganic middle film is used for water and oxygen blocking, the graphene is used for modifying polyurethane, the defects of polyurethane are overcome, and the flexible packaging composite film which is resistant to corrosion, high in strength and capable of blocking water and oxygen is obtained.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and relates to a flexible packaging composite film used for solar battery backplane films and a preparation method. Background technique [0002] With the astonishing increase in the output of solar cells in my country, the research and development of packaging materials and packaging technology has attracted more and more attention. Since solar cells cannot be directly exposed to natural conditions such as sunlight and rain, in order to realize the practical application of solar cells , it is necessary to protect the solar cells and form a battery module; solar cells are extremely sensitive to oxygen and water, so the packaging protective film has excellent water and oxygen barrier properties, and the packaging technology of solar cells is mainly divided into glass packaging and non-glass packaging. Packaging, glass packaging uses glass as the base material for packaging, and non-glass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/048H01L31/049H01L31/18
CPCH01L31/0481H01L31/049H01L31/1876Y02E10/50Y02P70/50
Inventor 白丹冯虎虎冉晨鑫黄维
Owner NORTHWESTERN POLYTECHNICAL UNIV