Modified poe photovoltaic encapsulant film, preparation method thereof and photovoltaic module

By introducing low-Tg COC and polar functionalized grafted POE into the POE photovoltaic encapsulation film, and combining it with a composite silane coupling agent, the problems of adhesive strength and water vapor transmission rate of the POE photovoltaic encapsulation film are solved, thereby improving the long-term reliability and power generation performance of photovoltaic modules.

CN121930747BActive Publication Date: 2026-06-05JIANGSU ZHONGLAI NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU ZHONGLAI NEW MATERIAL TECH CO LTD
Filing Date
2026-03-27
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Traditional POE photovoltaic encapsulation films have low adhesion strength to photovoltaic glass and high water vapor permeability, which affects the structural integrity and power generation efficiency of photovoltaic modules.

Method used

A cyclic olefin copolymer (COC) with a low glass transition temperature is used as a barrier masterbatch, combined with polar functionalized grafted POE and a composite silane coupling agent. Fine dispersion is achieved through the masterbatch process, which improves the adhesion strength between the encapsulant film and the photovoltaic glass and reduces the water vapor transmission rate.

Benefits of technology

This technology achieves ultra-high adhesion strength and extremely low water vapor transmission rate of photovoltaic encapsulation film to photovoltaic glass, improving the aging resistance, mechanical strength and anti-PID performance of photovoltaic modules, extending the service life of cells and improving photoelectric conversion efficiency.

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Abstract

The application relates to the technical field of photovoltaic packaging materials, and discloses a modified POE photovoltaic packaging adhesive film, a preparation method thereof and a photovoltaic module. The modified POE photovoltaic packaging adhesive film comprises 60-100 parts of POE resin, 8-50 parts of barrier master batch, 0.5-2 parts of composite silane coupling agent, 0.5-1.5 parts of crosslinking agent and 0.2-2 parts of auxiliary crosslinking agent; the barrier master batch comprises 5-30 parts of polar functionalized grafted POE and 3-20 parts of barrier agent; and the barrier agent is a cyclic olefin copolymer COC with Tg less than 120 DEG C. The modified POE photovoltaic packaging adhesive film has high bonding strength to photovoltaic glass and low water vapor permeability while keeping the high light transmittance and PID resistance of the existing POE adhesive film; the adhesive bonding, water blocking and light transmittance problems of the POE adhesive film are solved, the inherent processing compatibility problem between the COC and the POE matrix is overcome, and the long-term reliability of the photovoltaic module is improved.
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