Standard No.:	GB/T 4456-2026
English Name:	Polyethylene blown film for packaging applications
Chinese Name:	包装用聚乙烯吹塑薄膜
Chinese Classification:	G33    Plastic profile
Professional Classification:	GB    National Standard
ICS Classification:	83.140.10 83.140.10    Films and sheets 83.140.10
Source Content Issued by:	SAMR, SAC
Issued on:	2026-7-30
Implemented on:	2027-2-1
Status:	to be valid
Superseding:	GB/T 4456-2008 Polyethylene blown film for packaging applications
Target Language:	English
File Format:	PDF
Word Count:	6500 words
Translation Price(USD):	195.0
Delivery:	via email in 1~3 business day

GB/T 4456-2026 Polyethylene blown film for packaging applications English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS National Standard of the People's Republic of China ‌GB/T 4456-2026 Polyethylene blown film for packaging applications 包装用聚乙烯吹塑薄膜 Issue date: 2026-08-27 Implementation date: 2027-09-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 5 Requirements 6 Test Methods 7 Inspection Rules 8 Marking, Packaging, Transportation and Storage Polyethylene Blown Films for Packaging 1 Scope This document specifies the product classification, requirements, inspection rules, marking, packaging, transportation and storage of polyethylene blown films for packaging (hereinafter referred to as films), and describes the test methods. This document applies to the production, inspection and sale of films for direct packaging and films used as substrates for composite films, which are manufactured by the blown film process mainly from resins and blends such as low density polyethylene (PE-LD), linear low density polyethylene (PE-LLD), medium density polyethylene (PE-MD) and high density polyethylene (PE-HD). 2 Normative References The following documents contain provisions which, through normative reference in this text, constitute indispensable provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 1037 Plastics — Film and sheeting — Determination of water vapour transmission rate — Gravimetric (dish) method GB/T 1038.1 Plastics — Film and sheeting — Test method for gas transmission — Part 1: Differential-pressure method GB/T 1040.3 Plastics — Determination of tensile properties — Part 3: Test conditions for films and sheets GB/T 2410-2008 Determination of luminous transmittance and haze of transparent plastics 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 2913 Test method for whiteness of plastics GB/T 2918 Plastics — Standard atmosphere for conditioning and testing of specimens GB/T 6672 Plastics — Film and sheeting — Determination of thickness — Mechanical scanning method GB/T 6673 Plastics — Film and sheeting — Determination of length and width GB/T 9639.1-2008 Plastics — Film and sheeting — Test method for impact resistance by free-falling dart — Part 1: Staircase method GB/T 10006 Plastics — Film and sheeting — Determination of coefficient of friction GB/T 14216 Plastics — Film and sheeting — Determination of wetting tension GB/T 26253 Plastics — Film and sheeting — Determination of water vapour transmission rate — Infrared detector method GB/T 35773 Evaluation of odour for packaging materials and products QB/T 2358 Test method for heat seal strength of plastic film bags 3 Terms and Definitions No terms and definitions are required to be defined in this document. 4 Classification Films are classified into PE-LD film, PE-LLD film, PE-MD film and PE-HD film according to the type of raw material with the largest proportion in the blend. Films are divided into films for direct packaging and films used as substrates for composite films according to application. According to slitting process, they are classified into slit-cut method and shear-cut method. 5 Requirements 5.1 Dimensions 5.1.1 Width Tolerance The width tolerance of films for direct packaging (including width tolerance of folded width of tubular film, width tolerance of films slit by slit-cut method, width tolerance of films slit by shear-cut method) shall comply with Table 1. The width tolerance of films used as substrates for composite films shall comply with Table 2. 5.1.2 Thickness Tolerance Thickness tolerance shall comply with Table 3. 5.1.3 Number of Segments per Roll and Length per Segment The length of each segment shall not be less than 200 m, and obvious marks shall be made at joints. The number of joints shall comply with Table 4. 5.2 Appearance The appearance of films shall comply with Table 5. The appearance of film rolls shall comply with Table 6. 5.3 Physical and Mechanical Properties Physical and mechanical properties shall comply with Table 7. 5.4 Other Properties Requirements for coefficient of friction, luminous transmittance, haze, whiteness, odour, water vapour transmission rate and gas transmission rate shall be agreed between the supplier and purchaser.