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Position: Chinese Standard in English/GB/T 29848-2018
GB/T 29848-2018   Ethylene--vinyl acetate copolymer (EVA) film for PV module (English Version)
Standard No.: GB/T 29848-2018 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 8500 words Price(USD):140.0 remind me the price change

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Implemented on:2019-4-1 Delivery: via email in 1 business day
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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; 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
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is drafted in accordance with the rules given in GB/T 1.1-2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This standard was proposed by and is under the jurisdiction of the National Technical Committee on Semiconductor Equipment and Materials of Standardization Administration of China (SAC/TC 203). 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. 3.3 shrinkage rate percentage of the length reduction of a material after treatment (water immersion, heat setting or resin treatment, etc.) in its original length 4 Requirements 4.1 Specifications The specifications of a single roll of products shall meet those specified in Table 1. Table 1 Specifications No. Item Specification 1 Thickness/mm 0.2~0.8 2 Density (g/cm3) 0.95~0.96 Note: Special specifications may be implemented as per contracts. 4.2 Appearance The products shall be smooth in the appearance, without visible impurities or bubbles and with clear embossing. 4.3 Physical properties The physical properties of products shall meet those specified in Table 2.   Table 2 Physical properties No. Item Indicator 1 Content of vinyl acetate (mass fraction/%) 26~34 2 Light transmittance % EVA film for battery front Wavelength: 380 nm~1,100 nm ≥ 90 Wavelength: 290 nm~380 nm As agreed between the supplier and the purchaser EVA film for battery back Wavelength: 380 nm~1,100 nm As agreed between the supplier and the purchaser Wavelength: 290 nm~380 nm ≤ 30 3 Crosslinking degree % ≥ 75 4 Peel strength N/cm > 50 5 Shrinkage rate % < 3.0 in the machine direction (MD) < 1.5 in the transverse direction (TD) 6 Volume resistivity Ω·cm > 6.0 × 1013 7 Electrical breakdown strength kV/mm > 28.0 8 Accelerated aging resistance by ultraviolet lamp Change in yellowness indice < 5.0 Glass peel strength > 25 N/cm 9 Steady-state damp-heat aging resistance Change in yellowness indice < 5.0 Glass peel strength > 25 N/cm 5 Test methods 5.1 Sampling method After 3~5 layers are removed from the outer layers of EVA film roll for inspection, take the EVA film section wound evenly in the middle of the roll as the specimen film under inspection. 5.2 Requirements for specimen 5.2.1 Atmospheres for conditioning and testing specimen The atmospheres for conditioning and testing specimen shall be in accordance with GB/T 2918, at an ambient temperature of 23 °C ± 2 °C and a relative humidity of 50% ± 5%. Keep the specimen on a horizontal plane for not less than 24 h and conduct a test under this condition.  5.2.2 Back board for specimen The back board for tests in this standard shall meet the following requirements: its surface is made of fluorine-contained materials, and the water vapor transmission rate is less than 2.5 g/(m2·d); after an accelerated aging test by ultraviolet lamp at an irradiation intensity of 120 kW·h/m2, the yellowness indice of the back board is changed by less than 2.0, and the back board is free of interlayer separation after steady-state damp-heat aging test.
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
Referred in GB/T 29848-2018:
*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 electrical 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 2790-1995 Adhesives, 180°peel strength test method for a flexible-bonded-to-rigid test specimen assembly
*GB/T 2828.1-2012 Sampling procedures for inspection by attributea-Part1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection
*GB/T 2918-2018 Plastics--Standard atmospheres for conditioning and testing
*GB/T 6672-2001 Plastics film and sheeting--Determination of thickness by mechanical scanning
*GB/T 19394-2003 UV test for photovoltaic (PV) modules
Code of China
Standard
GB/T 29848-2018  Ethylene--vinyl acetate copolymer (EVA) film for PV module (English Version)
Standard No.GB/T 29848-2018
Statusvalid
LanguageEnglish
File FormatPDF
Word Count8500 words
Price(USD)140.0
Implemented on2019-4-1
Deliveryvia email in 1 business day
Detail of GB/T 29848-2018
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
Professional Classification
GB
ICS Classification
Issued by
SAMR; SAC
Issued on
2018-12-28
Implemented on
2019-4-1
Status
valid
Superseded by
Superseded on
Abolished on
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
Keywords
GB/T 29848-2018, GB 29848-2018, GBT 29848-2018, GB/T29848-2018, GB/T 29848, GB/T29848, GB29848-2018, GB 29848, GB29848, GBT29848-2018, GBT 29848, GBT29848
Introduction of GB/T 29848-2018
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is drafted in accordance with the rules given in GB/T 1.1-2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This standard was proposed by and is under the jurisdiction of the National Technical Committee on Semiconductor Equipment and Materials of Standardization Administration of China (SAC/TC 203). 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. 3.3 shrinkage rate percentage of the length reduction of a material after treatment (water immersion, heat setting or resin treatment, etc.) in its original length 4 Requirements 4.1 Specifications The specifications of a single roll of products shall meet those specified in Table 1. Table 1 Specifications No. Item Specification 1 Thickness/mm 0.2~0.8 2 Density (g/cm3) 0.95~0.96 Note: Special specifications may be implemented as per contracts. 4.2 Appearance The products shall be smooth in the appearance, without visible impurities or bubbles and with clear embossing. 4.3 Physical properties The physical properties of products shall meet those specified in Table 2.   Table 2 Physical properties No. Item Indicator 1 Content of vinyl acetate (mass fraction/%) 26~34 2 Light transmittance % EVA film for battery front Wavelength: 380 nm~1,100 nm ≥ 90 Wavelength: 290 nm~380 nm As agreed between the supplier and the purchaser EVA film for battery back Wavelength: 380 nm~1,100 nm As agreed between the supplier and the purchaser Wavelength: 290 nm~380 nm ≤ 30 3 Crosslinking degree % ≥ 75 4 Peel strength N/cm > 50 5 Shrinkage rate % < 3.0 in the machine direction (MD) < 1.5 in the transverse direction (TD) 6 Volume resistivity Ω·cm > 6.0 × 1013 7 Electrical breakdown strength kV/mm > 28.0 8 Accelerated aging resistance by ultraviolet lamp Change in yellowness indice < 5.0 Glass peel strength > 25 N/cm 9 Steady-state damp-heat aging resistance Change in yellowness indice < 5.0 Glass peel strength > 25 N/cm 5 Test methods 5.1 Sampling method After 3~5 layers are removed from the outer layers of EVA film roll for inspection, take the EVA film section wound evenly in the middle of the roll as the specimen film under inspection. 5.2 Requirements for specimen 5.2.1 Atmospheres for conditioning and testing specimen The atmospheres for conditioning and testing specimen shall be in accordance with GB/T 2918, at an ambient temperature of 23 °C ± 2 °C and a relative humidity of 50% ± 5%. Keep the specimen on a horizontal plane for not less than 24 h and conduct a test under this condition.  5.2.2 Back board for specimen The back board for tests in this standard shall meet the following requirements: its surface is made of fluorine-contained materials, and the water vapor transmission rate is less than 2.5 g/(m2·d); after an accelerated aging test by ultraviolet lamp at an irradiation intensity of 120 kW·h/m2, the yellowness indice of the back board is changed by less than 2.0, and the back board is free of interlayer separation after steady-state damp-heat aging test.
Contents of GB/T 29848-2018
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
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Keywords:
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