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GB/T 1685-2008 English PDF

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GB/T 1685-2008: Rubber, vulcanized or thermoplastic -- Determination of stress relaxation in compression at ambient and at elevated temperatures
Status: Valid

GB/T 1685: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 1685-2008209 Add to Cart 3 days Rubber, vulcanized or thermoplastic -- Determination of stress relaxation in compression at ambient and at elevated temperatures Valid
GB/T 1685-1982RFQ ASK 3 days Rubber vulcanized--Determination of stress relaxation in compression at normal and elevated temperature Obsolete

Similar standards

GB/T 1683   GB/T 1689   GB/T 1690   GB/T 1687.4   GB/T 1685.2   GB/T 1687.1   

Basic data

Standard ID: GB/T 1685-2008 (GB/T1685-2008)
Description (Translated English): Rubber, vulcanized or thermoplastic -- Determination of stress relaxation in compression at ambient and at elevated temperatures
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G40
Classification of International Standard: 83.060
Word Count Estimation: 9,999
Date of Issue: 2008-05-15
Date of Implementation: 2008-11-01
Older Standard (superseded by this standard): GB/T 1685-1982; GB/T 13643-1992
Quoted Standard: GB/T 528; GB/T 1690; GB/T 2941; GB/T 3452.1; GB/T 3512; GB/T 14838; ISO 4287
Adopted Standard: ISO 3384-2005, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the vulcanized rubber or thermoplastic rubber at the specified test temperature and compressed to keep the two measurement methods under a constant strain state force reduction. Sample is divided into two kinds of cylindrical and ring. Samples of different sizes and shapes of the different test results obtained, only samples of the same shape and size, the test results can be compared. Ring specimens is especially suitable for measuring stress relaxation in a liquid environment. This standard does not specify a temperature lower than the standard laboratory tests. This method can be used for low temperature test. However, the reliability of the test results were not confirmed.

GB/T 1685-2008: Rubber, vulcanized or thermoplastic -- Determination of stress relaxation in compression at ambient and at elevated temperatures


---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.
Rubber, vulcanized or thermoplastic.Determination of stress relaxation in compression at ambient and at elevated temperatures ICS 83.060 G40 National Standards of People's Republic of China Replacing GB/T 13643-1992, GB/T 1685-1982 Vulcanized rubber or thermoplastic rubber at room temperature and Determination of compression stress relaxation at high temperatures (ISO 3384.2005, MOD) Posted 2008-05-15 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts the International Standard ISO 3384.2005 "vulcanized rubber or thermoplastic rubber compression at room temperature and high temperature stress loose Determination of relaxation "(in English). This standard replaces GB/T 13643-1992 "vulcanized rubber or thermoplastic rubber ring compression stress relaxation measurement sample" and GB/T 1685-1982 "vulcanized rubber at room temperature and high temperature Determination of compression stress relaxation." This standard is based on ISO 3384.2005 re-drafted. This standard is the international standard ISO 3384.2005 and its main difference causes changes reg structured as follows. --- Normative references, the present standard with GB/T 14838-1993 "Rubber and rubber products standard test method precision The degree of certainty "instead of ISO /T R9272, the correspondence between the two non-equivalent; --- Added a cylindrical Ⅰ type specimens, such a requirement is mainly combined with China's national conditions. For ease of use, this standard made editorial changes. a) "this International Standard" be replaced by "this standard"; b) use a decimal point instead of a decimal comma ",". ","; c) Remove the preface to international standards. This standard and GB /and GB/T 1685-1982 compared to T 13643-1992 main changes are as follows. --- Increasing the Introduction (Excerpts of the introduction); --- Remove the ring sample test method C method (GB/T 13643-1992 6.5); --- Test Method made new provisions (GB/T 13643-1992 of 6, GB/T 1685-1982 5); --- Adjust the compression device and the measuring device requirements (GB/T 1685-1982, GB/T 13643-1992 3; 5 edition); --- Increases the thermal and mechanical adjustment to adjust the sample requirements (edition 6.5); --- Increasing the content and accuracy of the test report (edition of 10, 11). Appendix A of this standard is an informative annex. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standards Commission rubber rubber physical and chemical test methods Chapter (SAC/TC35/SC2) centralized. This standard by the National Standards Commission rubber rubber physical and chemical test methods Chapter (SAC/TC35/SC2) responsible for the interpretation. This standard drafting of the main unit. Rubber Group in Shenyang Rubber Research Institute, Northwest Rubber Plastics Industry Research and Design Institute. The main drafters of this standard. Yu Kai Jiang, Zhu Wei, Zhao Bodan. This standard replaces the standards previously issued as follows. --- GB/T 13643-1992; --- GB/T 1685-1979, GB/T 1685-1982.

Introduction

When the rubber is applied to a constant strain, maintaining the force required to strain is not constant, but decreases with the increase of time, which Phenomenon is known as stress relaxation, contrary rubber when subjected to constant stress, strain is increased over time increases, a phenomenon known as Creep. In essence, stress relaxation is mainly due to the physical and chemical processes. And under normal conditions two processes will also exist, but Is at room temperature or low temperature and (or) under short conditions, stress relaxation is mainly caused by physical processes; when at high temperature and (or) conditions for extended periods Under stress relaxation is mainly caused by chemical processes. If the study of material life, according to GB/T 20028 "vulcanized rubber or thermoplastic rubber applications A tired Nieuwpoort and VfB projected life Maximum use temperature "of the provisions in the air oven aging test. Stress relaxation tests in addition to a predetermined temperature and time interval required, but also the provisions of the forces and the initial stress of the sample, as these will Effects of stress relaxation tests, particularly for the filler-containing rubber. When stress relaxation test, keeping the temperature constant and the amount of compression is to get a good test repeatability and reproducibility of the most important factor. Vulcanized rubber or thermoplastic rubber at room temperature and Determination of compression stress relaxation at high temperatures

1 Scope

This standard specifies the vulcanized rubber or thermoplastic rubber at a predetermined test temperature and compressed to keep the action at a constant strain state Two methods to reduce the force. And an annular cylindrical specimens divided into two kinds. Different specimen sizes and shapes, different test results, only the same shape and size Sample, the test results can be compared. Ring specimens especially for the determination of stress relaxation in a liquid environment. The standard does not specify a temperature lower than the standard laboratory tests. This method can be used for low-temperature test, but the reliability of the test results did not It has been confirmed.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 528 vulcanized rubber or thermoplastic rubber tensile stress strain properties (GB/T 528-1998, eqv ISO 37.1994) GB/T 1690 vulcanized rubber or thermoplastic rubber resistant liquid test method (GB/T 1690-2006, ISO 1817.2005, MOD) GB/T 2941 rubber physical test method for preparing and conditioning General Procedure (GB/T 2941-2006, ISO 23529.2004, IDT) GB/T 3452.1 hydraulic and pneumatic rubber O-ring Part 1. Dimensions, tolerances (GB/T 3452.1-2005, ISO 3601-1.2002, MOD) GB/T 3512 vulcanized rubber or thermoplastic rubber hot air and heat accelerated aging test (GB/T 3512-2001, eqv ISO 188.1998) GB/T 14838 Test Method for Rubber and rubber products - Determination of precision standard (GB/T 14838-1993, neq ISO /T R9272. 1986) ISO 4287 Geometrical Product Specifications (GPS) - Surface texture. Profile method - Terms surface structure, definitions and parameters

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Means that after the application of a constant compressive deformation, the compression force decreases with increasing phenomenon with time, expressed as a percentage of the initial force. Principle 4 In the specified test temperature, the compression vulcanized rubber or thermoplastic rubber samples to and maintained at a constant state of strain, pressure measurement Reduce shrinkage force.
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