Standard No.:	GB/T 29848-2018
English Name:	Ethylene--vinyl acetate copolymer (EVA) film for PV module
Chinese Name:	光伏组件封装用乙烯-醋酸乙烯酯共聚物(EVA)胶膜
Chinese Classification:	L90    Special electronic technology material
Professional Classification:	GB    National Standard
Issued by:	SAMR and SAC
Issued on:	2018-12-28
Implemented on:	2019-4-1
Status:	valid
Superseding:	GB/T 29848-2013 Ethylene-vinyl acetate copolymer(EVA)film for encapsulant solar module
Language:	English
File Format:	PDF
Word Count:	8500 words
Price(USD):	140.0
Delivery:	via email in 1 business day

Ethylene-vinyl acetate copolymer (EVA) film for encapsulant solar module 1 Scope This standard specifies the terms and definitions, requirements, test methods, inspection rules, packaging, marking, transportation and storage of ethylene-vinyl acetate copolymer (EVA) film for ground encapsulant solar module (hereinafter referred to as "EVA film"). This standard is applicable to the film used for encapsulant solar module, formed by melt processing, with EVA as the main raw material and added with various additives. 2 Normative references The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendment) applies. GB/T 1033.1-2008 Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method liquid pyknometer method and titration method GB/T 1410-2006 Methods of test for volume resistivity and surface resistivity of solid insulating materials GB/T 1695-2005 Rubber, vulcanized — Determination of electrical breakdown strength and voltage resistant at commercial power frequency GB/T 2410-2008 Determination of the luminous transmittance and haze of transparent plastics GB/T 2423.3-2006 Environmental testing for electric and electronic products — Part 2: Testing method — Test Cab: Damp heat, steady state GB/T 2790 Adhesives, 180° peel strength test method for a flexible-bonded-to-rigid test specimen assembly GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection GB/T 2918 Plastics — Standard atmospheres for conditioning and testing GB/T 6672 Plastics film and sheeting — Determination of thickness by mechanical scanning GB/T 19394-2003 UV test for photovoltaic (PV) modules ASTME 313 Standard practice for calculating yellowness and whiteness indices from instrumentally measured color coordinates 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 ethylene-vinyl acetate copolymer (EVA) film film used for ground encapsulant solar module, formed by melt processing, with EVA as the main raw material and added with various additives 3.2 crosslinking degree degree to characterize the crosslinking of polymer chains Note: Generally, the crosslinking degree of EVA film is expressed by gel content, i.e. the percentage of crosslinking polymer chain in the total EVA.

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Requirements 5 Test methods 6 Inspection rules 7 Packaging, marking, transportation and storage Annex A (Normative) Content determination of VA in EVA film by hydrolysis and back titration method