Resin composition for solar backsheet base material and preparation method

A technology of resin composition and solar backsheet, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of poor cold resistance, low water absorption, low water vapor, etc., and achieves simple and easy preparation method and excellent low temperature shock resistance performance, low water vapor transmission rate

Active Publication Date: 2016-08-03
SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since polyester is a polymer that is not resistant to hydrolysis, even with these improved technologies, it is still difficult to meet the moisture and heat aging resistance performance requirements of solar backsheets.
In the Chinese invention patent application CN102365172A, a new type of laminated polyester film added with rutile titanium oxide particles is proposed, but its adhesion with the adjacent EVA film cannot be guaranteed, and the following problems still exist: On the one hand, the fluorine-containing film layer is expensive, on the other hand, there is still a polyester film in the structure, which cannot change the problem that the solar backsheet is not resistant to heat and humidity, has high water absorption, poor electrical insulation, and is easy to embrittle.
To sum up, the polyester film (PET) or polyamide film (PA) used as the substrate material of the photovoltaic backplane so far is difficult to overcome the defects of high water absorption rate and poor moisture and heat aging resistance (brittleness) due to the structural characteristics of the material.
[0005] On the other hand, polypropylene is a general-purpose polymer material, which has excellent electrical insulation, low water absorption, low water vapor transmission rate, etc., but it has poor cold resistance and is brittle at low temperatures.
If it is directly used as the material of the solar backsheet substrate, it cannot meet its low temperature impact resistance

Method used

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  • Resin composition for solar backsheet base material and preparation method
  • Resin composition for solar backsheet base material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of resin composition for solar backboard base material, its preparation method is as follows:

[0038] (1) Preparation of toughening agent A208

[0039] 100 parts (parts by mass) of LLDPE7042 (Beijing Yanshan Petrochemical Company, whose melt flow rate is 2.0 g / 10 min at 190 °C / 2.16 kg), 2 parts of vinyltrimethoxysilane A151 (Dow Corning Corporation of the United States), 0.2 parts of DCP The initiator (Tianjin Aksu Company) was measured separately and added to the mixer for mixing and homogenization. After two hours of homogenization, it was put into a twin-screw extruder for melt extrusion and granulation; mm, length-to-diameter ratio 33, screw temperature controlled at 160~220°C, screw speed controlled at 100 rpm, residence time of the material in the screw is 2~4 minutes;) Cooling and pelletizing to obtain granular toughening agent A208, Its melt flow rate at 190°C / 2.16kg is 0.2g / 10min;

[0040] The LLDPE7042 (Beijing Yanshan Petrochemical Company) is a lin...

Embodiment 2

[0044] A kind of resin composition for solar backboard base material, its preparation method is as follows:

[0045] (1) Preparation of toughening agent A208, see Example 1;

[0046] (2) 25 parts of A208, 75 parts of block copolymer polypropylene K8303, and 10 parts of wollastonite were measured and mixed uniformly, and put into a twin-screw extruder for melt extrusion and granulation; the twin-screws used exhaust screws, The diameter of the screw is 75 mm, the aspect ratio is 33, the temperature of the screw is controlled at 160~220°C, the speed of the screw is controlled at 100 rpm, and the residence time of the material in the screw is 2~4 minutes; the material is cooled, pelletized and dried. The finished product S2 has a melt flow rate of 1.0 g / 10 min at 230°C / 2.16 kg, and the material performance test is shown in Table 1.

Embodiment 3

[0048] A kind of resin composition for solar backboard base material, its preparation method is as follows:

[0049] (1) Preparation of toughening agent A208, see Example 1;

[0050] (2) 33 parts of A208 and 67 parts of polypropylene 1300 (Beijing Yanshan Petrochemical Company, whose melt flow rate is 1.5 g / 10 min at 230 °C / 2.16 kg), and 10 parts of wollastonite were measured and mixed uniformly, and put into Melting extrusion granulation is carried out in the twin-screw extruder; the twin-screw adopts exhaust screw, the screw diameter is 75 mm, the aspect ratio is 33, the screw temperature is controlled at 160~220 ° C, the screw speed is controlled at 100 rpm, and the material The residence time in the screw is 2~4 minutes; the material is finished product S3 after being cooled, pelletized and dried, and its melt flow rate at 230℃ / 2.16kg is 0.9g / 10min.

[0051] The polypropylene 1300 is a homopolypropylene produced by Beijing Yanshan Petrochemical Company, with a DSC melting...

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Abstract

The invention discloses a resin composition for a solar back panel base material. The base material comprises the following components in parts by mass: 100 parts of a component A, 20-100 parts of a silane grafted polyethylene flexibilizer and 1-100 parts of filler, wherein the component A is homo-polypropylene, polypropylene block copolymer or a mixture of homo-polypropylene and polypropylene block copolymer. The novel resin composition for a solar back panel base material developed by the invention, the obtained final product has excellent low-temperature impact resistance, aging resistance, in particular high-temperature damp-heat aging resistance, low saturated water absorption rate, low vapor transmission rate and excellent electrical insulation, and can be used for manufacturing a solar back panel.

Description

technical field [0001] The invention relates to a resin composition and a preparation method for a solar back plate base material, which can be used to prepare a solar cell back plate. Background technique [0002] Solar energy is the most abundant renewable energy resource, with unique advantages and huge potential for development and utilization. Solar power generation is a new technology in the way of solar energy utilization. Its power generation principle is to use the quantum effect of semiconductors such as silicon to directly convert the light energy of sunlight into electrical energy. However, if the silicon wafer is directly exposed to the atmosphere, its photoelectric conversion function will be attenuated. Therefore, in the prior art, EVA (ethylene-vinyl acetate copolymer) film is generally used as the packaging material to encapsulate the silicon wafer, and it is bonded with the upper protective material (such as low-iron tempered glass) and the lower protectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L53/00C08L51/06C08F255/02C08K13/02C08K3/34C08K3/22C08L77/00C08L67/00B29C47/92H01L31/049B29C48/92
CPCB29C48/022B29C48/92B29C2948/92209B29C2948/926B29C2948/92704
Inventor 罗吉江符书臻
Owner SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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