GB/T 1040.2-2022Plastics – Determination of Tensile Properties – Part 2: Test Conditions for Moulding and Extrusion Plastics (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.

This Document is Part 2 of GB/T 1040 Plastics – Determination of Tensile Properties, which has published the following parts:

--- Part 2: Test Conditions for Molding and Extrusion Plastics;

--- Part 3: Test Conditions for Films and Sheets;

--- Part 5: Test Conditions for Unidirectional Fiber-Reinforced Plastic Composites.

This Document replaced GB/T 1040.2-2006 Plastics - Determination of Tensile Properties - Part 2: Test Conditions for Moulding and Extrusion Plastics. Compared with GB/T 1040.2- 2006, the major technical changes are as follows besides the structural adjustments and editorial modifications:

--- Add the 75mm gauge length of the specimen (see 5.2 of this Edition);

--- Add the requirements for the accuracy of the extensometer when using different gauge lengths to determine the modulus (see 5.2 of this Edition);

--- Add the inter-lab precision data in China (see B.3 of this Edition).

This Document modified and adopts ISO 527-2:2012 Plastics – Determination of Tensile Properties – Part 2: Test Conditions for Mouilding and Extrusion Plastics.

The major technical differences and their causes between this Document and ISO 527-2:2012 are as follows:

--- For the Normative References, this Document has made adjustments with technical differences to adapt to the technical conditions of China. The adjustments are reflected in Clause 2 “Normative References”. The specific adjustments are as follows:

⚫ Use GB/T 1040.1-2018 that equivalently adopts the international standard to replace ISO 527-1:2012;

⚫ Use GB/T 5471 that equivalently adopts the international standard to replace ISO 295;

⚫ Use GB/T 9352 that equivalently adopts the international standard to replace ISO 293;

⚫ Use GB/T 17037.1 that modifies and adopts the international standard to replace ISO 291-1;

⚫ Use GB/T 37426 that modifies and adopts the international standard to replace ISO 20753;

⚫ Use GB/T 39812 that equivalently adopts the international standard to replace ISO 2818.

--- Add the requirements for the accuracy of the extensometer when using different gauge lengths to determine the modulus (see 5.2 of this Document), which is consistent with ISO 527-1:2019.

--- Add the inter-lab precision data in China as the content of B.3, so that adapt to the actual situation of China.

Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents.

This Document was proposed by China Petroleum and Chemical Industry Federation.

This Document shall be under the jurisdiction of National Technical Committee on Plastics of Standardization Administration of China (SAC/TC 15).

Drafting organizations of this Document: Zhonglan Chenguang Chengdu Detection Technology Co., Ltd.; China Energy Yulin Chemical Co., Ltd.; Shandong Wanda Chemical Industries Co., Ltd.; PetroChina Sichuan Petrochemical Co., Ltd.; Guangzhou Synthetic Materials Research Institute Co., Ltd.; Shandong Chambroad Petrochemical Co., Ltd.; PetroChina Daqing Refining & Petrochemical Company; Shandong Nonmetallic Materials Institute; Shaanxi Yanchang Coal Yulin Energy and Chemical Co., Ltd.; CGN-Delta (Taicang) Testing Technology Co., Ltd.; Kingfa Sci. & Tech. Co., Ltd.; Shandong Dawn Polymer Co., Ltd.; Shenzhen Wance Testing Machine Co., Ltd.; Weihai Lianqiao New Material Science and Technology Co., Ltd.; Chengde Precision Testing Machine Co., Ltd.; SINOPEC Shanghai Petrochemical Company Limited; Fujian Example EOE Group Co., Ltd.; Suzhou SUNPOLY Co., Ltd.; CGN Juner (Zhejiang) New Materials Co., Ltd.; Zhejiang Xinli New Material Co., Ltd.; Institute of Analysis and Testing, Beijing Academy of Science and Technology (Beijing Center for Physical & Chemical Analysis); Qingdao Product Quality Supervision and Testing Research Institute; SINOPEC Research Institute of Petroleum Processing; Beijing C-Plast Chenguang Technology Co., Ltd.;

Beijing Yanshan Petrochemical High-Tech Company Limited; Guangzhou Quality Supervision and Testing institute; SINOPEC Yanshan Branch, Beijing Research Institute of Chemical Industry; Qingdao Aohairuitai Industrial Co., Ltd.; SINOPEC Shanghai Gaoqiao Petrochemical Co., Ltd.; Pingdingshan Shenma Engineering Plastics Co., Ltd.; PetroChina PetroChemical Research Institute; Chongqing Yuntianhua Tianju New Material Co., Ltd.; Xinjiang Turpan Natural Environmental Test Research Center; PetroChina Lanzhou Petrochemical Industry Company; Suzhou Runjia Engineering Plastics Co., Ltd.; Orinko Advanced Plastics Co., Ltd.; SINOPEC Qilu Company; Shanghai Huace Pinbiao Testing Technology Co., Ltd.; Ningbo Customs District Technology Center; and PetroChina Daqing Petrochemical Industry Company.

Chief drafting staffs of this Document: Wang Boen, Liu Lirong, Zhang Yachun, Xie Fengming, Zhang Zhongming, Liu Xiaodan, Zhao Yongchen, Xu Peng, Meng Xiangyan, Wang Huineng, Li Jianxi, Tong Wei, Zhao Lei, Mou Xiufa, Geng Jianjia, Wang Xinhua, Quan Naijia, Zhang Musheng, Wang Haili, Zhang Lei, Ye Yaoting, Guo Xia, Cheng Dong, Huang Qizhong, Guo Lingxiao, Wang Xinglian, Zhou Cheng, Zhang Mei, Yu Feng, Chen Hongyuan, Xing Jin, Zhang Yaoyue, Chen Weili, Li Xiaozeng, Guo Xi, Xing Guizheng, Shou Weidong, Qin Xinying, Zhang Cuiling, Pu Xuetao, Guo Chunyun, Song Dan, Wang Liwen, Yi Qingfeng, luan Ling, Jin Feng, Luo Chuan, Wang Xiaobing, Zhang Wei, and Liu Xuesong.

This Document was first-time published in 1979; first-time revised in 1992; second-time revised in 2006; and it is third-time revised hereby.

Introduction

GB/T1040 specifies the method for determining the tensile properties of plastics and composite materials. As the basic method of plastic testing, the formulation and revision of this series of standards not only conforms to the actual situation in China, but also helps to promote the healthy development of the industry. GB/T 1040 consists of the following parts:

--- Part 1: General Principles (This Document specifies general principles for determining the tensile properties of plastics and composite materials under defined conditions, and specifies several test specimens of different shapes for use with different types of materials);

--- Part 2: Test Conditions for Molding and Extrusion Plastics (This Document specifies the test conditions for determining the tensile properties of molded and extruded materials on the basis of GB/T1040.1);

--- Part 3: Test Conditions for Films and Sheets (This Document specifies the test conditions for determining the tensile properties of plastic films or sheets with a thickness of less than 1mm on the basis of GB/T1040.1);

Composites ((This Document specifies the test conditions for the determination of isotropic and orthotropic fiber-reinforced composite materials on the basis of GB/T1040.1);

Document specifies the test conditions for unidirectional fiber-reinforced composite materials on the basis of GB/T1040.1).

GB/T 1040.1 has been revised in 2018. Because the corresponding terms and definitions have undergone major changes, GB/T 1040.2-2006 no longer matches GB/T1040.1. For the overall coordination of the basic national standard system, GB/T1040.2-2006 was revised this time.

1 Scope

This Document specifies the test conditions for determining the tensile properties of moulding and extrusion plastics, based upon the general principles given in GB/T 1040.1.

This Document is applicable to the following range of materials:

— rigid and semi-rigid thermoplastics moulding, extrusion and cast materials, including compounds filled and reinforced by, for example, short fibers, small rods, plates or granules but excluding textile fibers (see GB/T 1040.4 and GB/T 1040.5). See GB/T 1040.1-2018, Clause 3 for the definition of “rigid” and “semi-rigid”.

— rigid and semi-rigid thermosetting moulding and cast materials, including filled and reinforced compounds but excluding textile fibers as reinforcement (see GB/T 1040.4 and GB/T 1040.5);

This Document is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. For rigid cellular materials see GB/T 9641.

This Document is not suitable for flexible films and sheets, of thickness smaller than 1 mm, see GB/T 1040.3.

This Document applied using specimens which may be either moulded to the chosen dimensions or machined, cut or punched from injection‑ or compression‑moulded plates. The multipurpose test specimen is preferred (see GB/T 37426).

2 Normative References

The provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document.

3 Terms and Definitions

4 Principle and Methods

The principle and methods described in GB/T 1040.1-2018 is applicable to this Document.

5 Apparatus

6 Test Specimens

7 Conditioning

8 Procedure

For measurement of the tensile modulus (see GB/T 1040.1-2018, 3.9), the speed of testing shall be 1 mm/min for specimen types 1A and 1B (see Figure 1). This corresponds to a strain rate of approximately 1 % min-1. For small specimens see Annex A.

9 Calculation and Expression of Results

10 Precision

11 Test Report

The test report shall include the following information:

a) a reference to this Document, including the type of specimen and the testing speed according to:

, resulting from l1, r, b1 and b2, but within the indicated tolerances.