GB/T 19787-2025Packaging materials — Heat-shrinkable polyolefine films (English PDF)

Foreword

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.

This document replaces GB/T 19787-2005 "Polyolefin heat shrinkable film for packaging materials". Compared with GB/T 19787-2005, In addition to structural adjustments and editorial changes, the main technical changes are as follows.

— Changed the scope (see Chapter 1, Chapter 1 of the 2005 edition);

— Deleted product specifications (see Chapter 3 of the 2005 edition);

— Added classification (see Chapter 4);

— Changed the technical requirements for width deviation (see 5.2.1, 4.1 of the 2005 edition);

— Added relevant requirements for polyolefin heat shrinkable films with nominal thickness of 8µm<=e< 12µm, 30µm<=e<=52µm (see 5.2.2, 5.3 and Table 3);

— Deleted product grade (see 4.2 and 4.3 of the 2005 edition);

— Changed the physical and mechanical properties requirements (see 5.3, 4.4 of the 2005 edition);

— Added gloss item (see 5.3);

— Changed the right-angle tear load to tear resistance (see 5.3, 4.4 of the 2005 edition);

— Changed the coefficient of kinetic friction (film to film) (see 5.3, 4.4 of the 2005 edition);

— Deleted the hygienic performance (see 4.5 of the 2005 edition);

— Changed the test method for thickness deviation (see 6.4, 5.3 of the 2005 edition);

— Changed the test method and test temperature for thermal shrinkage (see 6.8, 5.8 of the 2005 edition).

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 is proposed and coordinated by the National Technical Committee for Packaging Standardization (SAC/TC49).

This document was drafted by: Zhejiang Zhongcheng Packaging Materials Co., Ltd., Jiangsu Libin New Materials Technology Co., Ltd., Xiamen Changsu Industry Co., Ltd., Shandong Huihe Plastic Industry Co., Ltd., Guangzhou Biaoji Packaging Equipment Co., Ltd., Shandong Product Quality Inspection Institute, Suqian Jin Tian Plastic Industry Co., Ltd., Yiwu Wanrui Plastic Products Co., Ltd., Zhejiang Jiuteng Packaging Materials Co., Ltd., Zhanjiang Packaging Materials Enterprise Co., Ltd.

Company, Hubei Huanggang Zhongda High-tech Packaging Materials Co., Ltd., Shandong Yaxin Plastic Packaging Co., Ltd., Shandong Yongju Pharmaceutical Technology Co., Ltd.

Company, Dawn Zhou (Qingdao) Composite Packaging Materials Co., Ltd., Jinan Languang Electromechanical Technology Co., Ltd., China Export Commodity Packaging Research Institute, Chengdu Product Quality Supervision and Inspection Institute, Zhejiang Fangyuan Testing Group Co., Ltd., Hebei Product Quality Supervision and Inspection Institute, Shandong Media Vocational College, Anhui Zijin New Materials Technology Co., Ltd., Shandong Liman Packaging and Printing Co., Ltd., Beijing Chunfeng Pharmaceutical Co., Ltd.

Co., Ltd., Jiangsu Yushi Film Technology Co., Ltd., Zhejiang Jingbo Polyolefin New Materials Co., Ltd., Hangzhou Jinhang New Materials Co., Ltd., Ningbo Yingrui Polymer Technology Co., Ltd. and Hebei Runte New Materials Technology Group Co., Ltd.

The main drafters of this document are: Yang Xuejun, Zhang Zhili, Zhou Wanru, Zhao Yang, Gao Yong, Zhan Yueqiang, Zhou Maomao, Shao Dehua, Chen Xi, Xu Zichao, Zhao Jinchao, You Xinxin, Wang Lei, Fu Jinbei, Jin Zhiping, Chen Zhibin, Huo Yanjun, Zhao Junlian, Li Shuangli, Hao Wenjing, Wang Guanzhong, Feng Qingzheng, Li Xiao, Huang Rong, Liu Jinpeng, Li Hui, Yue Lei, Zhu Lei, Li Xiaoming, Huang Xusheng, Xiao Liwei, Zheng Wei, Qin Youwen, Shang Huihua, Yuan Wenbo, Wang Sixuan, Shao Zheng, Wu Guoqian.

The previous versions of this document and the documents it replaces are as follows.

— First published in 2005 as GB/T 19787-2005;

— This is the first revision.

1 Scope

This document specifies the requirements for polyolefin heat shrinkable films (hereinafter referred to as films), describes the corresponding test methods, and specifies the inspection specifications.

It specifies the rules, marking, packaging, transportation and storage, and gives the product classification.

This document is applicable to the use of polyethylene, polypropylene and other resins as the main raw materials, through the tube film method multi-layer co-extrusion cooling to make the film embryo, and then Film with heat shrinkage function made by biaxial synchronous stretching, etc.

2 Normative references

GB/T 1040.3

GB/T 2410

GB/T 2828.1

GB/T 2918

GB/T 6672

GB/T 6673

GB/T 8807

GB/T 10006

GB/T 16578.2

3 Terms and Definitions

There are no terms or definitions that require definition in this document.

4 Categories

According to the process, it is divided into ordinary type and cross-linked type.

— Ordinary type refers to the polyolefin heat shrinkable film produced by the tubular film method and synchronous biaxial stretching process.

— Cross-linked type refers to a polyolefin that is cross-linked in its molecular chain by electron irradiation based on the synchronous biaxial stretching process of the tubular film method. Hydrocarbon heat shrink film.

5 Requirements