GB/T 42258-2022 English PDF

US$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42258-2022: Flexible cellular polymeric materials - Determination of fatigue by a constant-strain procedure
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42258-2022	199	Add to Cart	3 days	Flexible cellular polymeric materials - Determination of fatigue by a constant-strain procedure	Valid

Similar standards

GB/T 36363   GB/T 20786   GB 18241.1   GB/T 42267   GB/T 42266   

Basic data

Standard ID: GB/T 42258-2022 (GB/T42258-2022)
Description (Translated English): Flexible cellular polymeric materials - Determination of fatigue by a constant-strain procedure
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G47
Classification of International Standard: 83.140.99
Word Count Estimation: 10,147
Date of Issue: 2022-12-30
Date of Implementation: 2023-04-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42258-2022: Flexible cellular polymeric materials - Determination of fatigue by a constant-strain procedure

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 83.140.99 CCSG47 National Standards of People's Republic of China flexible porous polymer material Determination of Fatigue Properties by Constant Deformation Method (ISO 24999.2008, MOD) Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

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 is modified to adopt ISO 24999.2008 "Determination of fatigue properties of flexible porous polymer materials by constant deformation method". Compared with ISO 24999.2008, this document has made the following structural adjustments. --- The chapter "Terms and Definitions" has been added; ---A.3.1 corresponds to A.3.2 of ISO 24999.2008; ---A.3.2 corresponds to A.3.1 and A.3.3 of ISO 24999.2008; The technical differences between this document and ISO 24999.2008 and their reasons are as follows. ---The stroke of the equipment is specified as compressing to 50% of the initial thickness of the thinnest sample (d1), and returning to the initial thickness of the thickest sample (d1), avoiding Avoid possible disputes (see Chapter 7); ---The precision of ISO 24999.2008 is based on ISO /T R9272, but ISO /T R9272 has been adopted by ISO.19983. 2017 instead, this document is reworked based on ISO.19983.2017, ISO 5725-2.2019 and GB/T 6379.6-2009 Precision test (see A.1 in Appendix A). The following editorial changes have been made to this document. --- Replaced ISO /T R9272 with the informative reference ISO.19983.2017, and added the informative reference document ISO 5725-2. 2019 (see A.1), to be consistent with international standards; --- Added an informative reference to GB/T 6379.6-2009 (see A.1) to be consistent with our standards. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Petroleum and Chemical Industry Federation. This document is sponsored by the National Rubber and Rubber Products Standardization Technical Committee Rubber Miscellaneous Subcommittee (SAC/TC35/SC7) Focus on. This document is drafted by. Shandong Yinuowei Polyurethane Co., Ltd., Shaanxi Changmei Technology Co., Ltd., Qingdao Xinxi Plastic Co., Ltd. Co., Ltd., Hubei Xiangyuan New Material Technology Co., Ltd., Beijing Huateng Testing and Certification Co., Ltd. The main drafters of this document. Xu Jun, Chen Hailiang, Zhang Faming, Dong Anzhong, Wei Qiong, Guo Yongsheng, Wang Longfei, Nian Yingjun, Duan Jianping, Wang Yaxiong. flexible porous polymer material Determination of Fatigue Properties by Constant Deformation Method WARNING --- Personnel using this document should be familiar with basic laboratory procedures. This document is not intended to address all problems in using There are security concerns. It is the user's responsibility to establish appropriate safety and health regulations and ensure compliance with national regulatory conditions.

1 Scope

This document describes a method for the determination of the fatigue properties of flexible porous polymeric materials expressed in terms of thickness loss under repeated constant deformation compression. This document applies to quality control during the production of flexible porous polymeric materials. ISO 3385 [2] has specified another fatigue performance test method. by applying constant pressure instead of constant deformation to the sample to determine Fatigue Behavior of Flexible Porous Polymeric Materials. The material classification system in ISO 5999 [4] is based on this approach. These two fatigue performance testing methods are complementary and both can be used to predict end-use performance. The methods and equipment used in this document allow for the testing of multiple specimens at one time, whereas the compression equipment in ISO 3385 [2] only allows for one test a sample.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 6342 Determination of linear dimensions of foamed plastics and rubber (GB/T 6342-1996, ISO 1923.1981, IDT)

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 principles

Repeatedly act on the entire surface of the sample with a constant deformation to measure the final thickness of the sample.

5 instruments

The compression testing machine used should have the following structures and functions. ---Have two parallel square plates, the size of which is at least 10mm longer than the sample; ---The upper and lower plates vibrate in the vertical direction to pressurize the sample, and the distance between the two plates can be adjusted; --- The lower plate has exhaust holes with a diameter of about 6mm and an interval of about 20mm, so that the gas during the compression process is discharged from the sample. A typical design of the compression testing machine is shown in Figure 1. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42258-2022_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42258-2022_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42258-2022_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42258-2022_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.