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A kind of pvb resin for photovoltaic and its production method and the method of using the resin powder to produce photovoltaic pvb film

A production method and photovoltaic technology, applied in the direction of photovoltaic power generation, renewable energy integration, sustainable building, etc., can solve the problems of excessive wet leakage current, excessive power attenuation, and insulation decline, so as to improve resistivity and increase Fluidity and the effect of reducing precipitation

Active Publication Date: 2021-01-15
ZHEJIANG DECENT PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the affinity of PVB for water, under long-term high temperature and high humidity conditions, its insulation will drop sharply due to the continuous absorption of moisture, resulting in the failure of the electrical performance test of photovoltaic modules, excessive wet leakage current, and power failure. Attenuation is too large, etc.

Method used

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  • A kind of pvb resin for photovoltaic and its production method and the method of using the resin powder to produce photovoltaic pvb film
  • A kind of pvb resin for photovoltaic and its production method and the method of using the resin powder to produce photovoltaic pvb film
  • A kind of pvb resin for photovoltaic and its production method and the method of using the resin powder to produce photovoltaic pvb film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Add 100kg PVB1 resin powder and various additives (antioxidant, surface tension control agent and cohesion control agent) into the powder mixer, stir at a high speed of 1000RPM for 20 minutes, and control the temperature of the material at 40°C- between 50°C. Finally, add plasticizer 3G8: 26.5kg and DBS: 11.3kg at a speed of 20RPM, and stir at a low speed for 5-10 minutes. Then put the above-mentioned mixture into the twin-screw extruder in a metered manner, the aspect ratio is 36:1, the processing temperature is set between 160-190°C, melted and plasticized at the screw speed of 80RPM, and passed A T-shaped mold with an opening of 0.5mm-0.8mm forms a PVB film with uniform thickness, which is cooled and shaped, and then coiled into a finished product.

Embodiment 2

[0061] 100kg of PVB2 resin powder, 20.2kg of 3G8, and 8.7kg of DBS were carried out according to the process in Example 1 to obtain a PVB interlayer for photovoltaic use.

Embodiment 3

[0063] Add 100kg of ordinary PVB3 resin powder and various additives (antioxidant, surface tension control agent and cohesion control agent) into the powder mixer, stir at a high speed of 1000RPM for 20 minutes, and control the temperature of the material at 40°C Between -50°C. Finally, add 4,5-epoxy tetrahydrophthalate bis(2-ethylhexyl) ester, 26.5kg of DBS, 11.3kg of plasticizer 0.2kg at a rotating speed of 20RPM, and stir at a low speed for 5- 10 minutes. Then put the above-mentioned mixture into the twin-screw extruder in a metered manner, the length-to-diameter ratio is 36:1, the processing temperature is set between 160-190°C, melted and plasticized under the condition of the screw speed of 80RPM, and passed A T-shaped mold with an opening of 0.5mm-0.8mm forms a PVB film with uniform thickness, which is cooled and shaped, and then coiled into a finished product.

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Abstract

The invention relates to photovoltaic PVB (polyvinyl butyral) resin, a production method thereof and a method for producing a photovoltaic PVB interlayer from resin powder. The production method comprises steps as follows: di(2-ethylhexyl)4,5-epoxytetrahydrophthalate is taken as an internal plasticizer, subjected to a reaction with hydroxyl on PVB and grafted to PVB molecular chains in a lateral group form finally, the self-lubricating effect is realized, and the obtained photovoltaic PVB interlayer has higher fluidity, lower hygroscopicity and higher electrical resistivity.

Description

technical field [0001] The invention relates to the field of packaging materials for photovoltaic modules, in particular to a high-fluidity photovoltaic PVB resin, a production method thereof, and a method for producing photovoltaic PVB films using the resin powder. Background technique [0002] Polyvinyl butyral (hereinafter referred to as PVB) resin is the main raw material for producing PVB diaphragms and belongs to the field of thermoplastic polymer materials. After more than half a century of development, PVB film has become an essential raw material for the production of various safety glass due to its excellent optical properties, high temperature resistance, low temperature resistance, mechanical properties and good bonding performance to inorganic glass. When subjected to a strong impact from the outside world, the PVB diaphragm can absorb the impact energy without producing broken pieces. While having safety features, it has also developed functions such as sound i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/14C08K5/1515C08J5/18H01L31/048
CPCC08J5/18C08J2329/14C08K5/1515H01L31/0481C08L29/14Y02B10/10Y02E10/50
Inventor 王验谢怀玉莫国军王博叶卫民
Owner ZHEJIANG DECENT PLASTIC