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GB/T 45939-2025: Co-extrusion encapsulant film for photovoltaic module
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GB/T 45939-2025: Co-extrusion encapsulant film for photovoltaic module

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ICS 31.030 CCSL90 National Standard of the People's Republic of China Co-extruded film for photovoltaic module encapsulation Released on August 1, 2025 Implementation on November 1, 2025 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Requirement 2 4.1 Appearance 2 4.2 Specifications and deviations 2 4.3 Physical properties 2 5 Test Method 3 5.1 Sampling method 3 5.2 Test conditions 3 5.3 Appearance Inspection 3 5.4 Specifications and deviation determination 3 5.5 Physical properties determination 5 6 Inspection Rules 12 6.1 Inspection categories 12 6.2 Inspection Item 13 7 Packaging, labeling, transportation and storage 13 7.1 Packaging 13 7.2 Sign 14 7.3 Transportation 14 7.4 Storage 14 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Technical Committee for Semiconductor Equipment and Materials Standardization (SAC/TC203). This document was drafted by. Hangzhou Foster Applied Materials Co., Ltd., Changzhou Swick Photovoltaic New Materials Co., Ltd., Wuxi Municipal Procuratorate Inspection and Certification Research Institute, Suzhou Foster Photovoltaic Materials Co., Ltd., China Electronics Technology Standardization Institute, Wanhua Chemical Group Co., Ltd. Co., Ltd., Yida New Energy Technology Co., Ltd., Zhejiang Dilong Optoelectronic Materials Co., Ltd., JA Solar Technology Co., Ltd., Zhejiang JinkoSolar Co., Ltd., Chint New Energy Technology Co., Ltd., Zhejiang Xiangbang Technology Co., Ltd., Suzhou Yisheng Optical Materials Co., Ltd., Hangzhou Xinzi Optoelectronics Technology Co., Ltd., Suqian Taijing New Materials Technology Co., Ltd., Lvkang (Yushan) Film Materials Co., Ltd. Company, Hainan Beiouyi Technology Co., Ltd., Tianyang New Materials (Shanghai) Technology Co., Ltd., Huangshan Fule New Energy Technology Co., Ltd., Shanghai Electric Group Hengxi Photovoltaic Technology (Nantong) Co., Ltd., Hangzhou Fumao Photovoltaic Materials Co., Ltd., and Zhejiang Guoneng Technology Co., Ltd. The main drafters of this document are. Sang Yan, Mu Danhua, Hou Hongbing, Zhou Guangda, Ji Zhichao, Tian Qianqian, Sun Xiaoyang, Wang Chenyi, Chen Xiaoda, Liang Xiaomin, Dai Jianfang, Zhang Chuanji, Zhang Jun, Tao Wusong, He Chenxu, Wu Qian, Zhou Zhiying, Pan Jun, Ma Jianhua, Ma Lei, Huang Hanjin, Zhao Yongchen, Huang Shengyang, Zhang Wei, Li Chen, Bian Haihua, and Song Zhiguo. Co-extruded film for photovoltaic module encapsulation

1 Scope

This document defines the terms and definitions of co-extruded films for photovoltaic module encapsulation (hereinafter referred to as "co-extruded films"), and specifies the requirements, inspection regulations, It also describes the rules, packaging, labeling, transportation and storage, and the corresponding test methods. This document is applicable to co-extruded films for crystalline silicon photovoltaic module encapsulation and is used as a reference for films for thin-film module encapsulation.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 1033.1 Plastics - Determination of density of non-cellular plastics - Part 1.Immersion method, pycnometer method and titration method GB/T 1408.1 Test methods for electric strength of insulating materials Part 1.Tests at power frequency GB/T 2410 Determination of light transmittance and haze of transparent plastics GB/T 2790 Adhesives - 180° peel strength test method - Flexible materials to rigid materials GB/T 2828.1 Sampling procedures for inspection by attributes Part 1.Sampling plans for batch inspection based on acceptance quality limit (AQL) GB/T 4207 Determination of tracking resistance index and relative tracking index of solid insulating materials GB/T 29848-2018 Ethylene-vinyl acetate copolymer (EVA) film for photovoltaic module encapsulation GB/T 31838.2 Dielectric and resistive properties of solid insulating materials Part 2.Resistance properties (DC method) Volume resistance and Volume resistivity GB/T 39822 Determination of yellowness index and its variation value of plastics GB/T 41203-2021 Accelerated aging test method for photovoltaic module packaging materials IEC 61215-2.2021 Terrestrial photovoltaic modules design qualification and type approval Part 2.Test procedures

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 co-extrusion film Ethylene-vinyl acetate copolymer (EVA) resin and polyolefin elastomer (POE) resin are used as two main raw materials, and multiple The additives are melt-extruded, compounded and co-cast to form a packaging film with a multi-layer structure. Note. Polyolefin elastomers mainly refer to copolymers of ethylene and α-olefins (1-butene, 1-hexene, 1-octene, etc.). 3.2 surface density surfacedensity The mass per unit area of co-extruded film. Note 1.Also known as gram weight. Note 2.The unit is grams per square meter (g/m2). ...