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GB/T 6344-2008 English PDF (GB/T 6344-1996, GB/T 6344-1986)

GB/T 6344-2008_English: PDF (GB/T6344-2008)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 6344-2008English105 Add to Cart 0--9 seconds. Auto-delivery Flexible cellular polymeric materials -- Determination of tensile strength and elongation at break Valid GB/T 6344-2008
GB/T 6344-1996English199 Add to Cart 3 days [Need to translate] Polymeric materials, cellular flexible--Determination of tensile strength and elongation at break Obsolete GB/T 6344-1996
GB/T 6344-1986EnglishRFQ ASK 3 days [Need to translate] Polymeric materials, cellular flexible--Determination of tensile strength and elongation at break Obsolete GB/T 6344-1986


BASIC DATA
Standard ID GB/T 6344-2008 (GB/T6344-2008)
Description (Translated English) Flexible cellular polymeric materials. Determination of tensile strength and elongation at break
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G31
Classification of International Standard 83.080.01
Word Count Estimation 7,789
Date of Issue 2008-08-19
Date of Implementation 2009-05-01
Older Standard (superseded by this standard) GB/T 6344-1996
Quoted Standard GB/T 6342; ISO 7500-1: 2004; ISO 9513; ISO 23529
Adopted Standard ISO 1798-2008, IDT
Drafting Organization Beijing Technology and Business University
Administrative Organization National Plastics Standardization Technical Committee
Regulation (derived from) National Standard Approval Announcement 2008 No.14 (Total No.127)
Proposing organization China Light Industry Federation
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the tensile strength and elongation at break of soft foam polymeric materials to fracture at a constant rate tensile testing methods. This standard applies to soft foam polymeric material tensile strength and elongation at break test for.

BASIC DATA
Standard ID GB/T 6344-1996 (GB/T6344-1996)
Description (Translated English) Polymeric materials, cellular flexible--Determination of tensile strength and elongation at break
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G31
Classification of International Standard 83.1
Word Count Estimation 5,547
Date of Issue 1996/4/10
Date of Implementation 1996/12/1
Older Standard (superseded by this standard) GB 6344-1986
Quoted Standard GB/T 6342,
Adopted Standard ISO 1798-1983, IDT
Regulation (derived from) Announcement of Newly Approved National Standards 2008 No. 14 (No. 127 overall)

BASIC DATA
Standard ID GB/T 6344-1986 (GB/T6344-1986)
Description (Translated English) Polymeric materials, cellular flexible--Determination of tensile strength and elongation at break
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G31
Date of Issue 1986/4/28


GB/T 6344-2008 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.080.01 G 31 GB/T 6344-2008 / ISO 1798:2008 Replacing GB/T 6344-1996 Flexible cellular polymeric materials – Determination of tensile strength and elongation at break (ISO 1798:2008, IDT) ISSUED ON: AUGUST 19, 2008 IMPLEMENTED ON: MAY 01, 2009 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 5 4 Apparatus ... 6 5 Test pieces ... 6 6 Procedure ... 8 7 Calculation ... 8 8 Test report ... 9 Foreword This Standard is identical to the International Standard ISO 1798:2008 Flexible cellular polymeric materials - Determination of tensile strength and elongation at break. It is completely identical to ISO 1798:2008 in terms of technical content and text structure, with only the following editorial changes: ⎯ Delete the Foreword of the International Standard; ⎯ Delete the Table of Contents of the International Standard; ⎯ Delete the general warning terms for laboratory operators in the International Standard. This Standard replaces GB/T 6344-1996, Polymeric materials, cellular flexible - Determination of tensile strength and elongation at break. Compared with GB/T 6344-1996, the main changes of this Standard are as follows: ⎯ Modify part of Clause 4; ⎯ Delete 4.1 Thickness gauge; add relevant requirements for "Tensile-testing machine"; ⎯ Add Type 1A test pieces to 5.2; ⎯ In 5.4, add relevant provisions that materials shall be tested 16 h or 48 h after manufacture; ⎯ Change "average tensile strength" to "tensile strength” in 7.1; ⎯ In Formula (1), use "TS” instead of "σt" to represent the tensile strength; ⎯ In Formula (2), use "Eb" instead of "εt" to represent the elongation at break. This Standard was proposed by China National Light Industry Council. This Standard shall be under the jurisdiction of National Technical Committee 48 on Plastic Products of Standardization Administration of China. Drafting organizations of this Standard: Beijing Technology and Business University, Gansu Leather and Plastics Research Institute, National Light Industry Plastics Product Quality Supervision and Inspection Lanzhou Station, Gansu Leather and Plastic Quality Supervision and Inspection Station, Sinomax Kuka (Zhejiang) Foam Co., Ltd. Main drafters of this Standard: Lian Qin, Chen Qian, Yuan Liqun, Wang Xiaopeng, Zhang Dingjun, Qian Hongxiang. Flexible cellular polymeric materials — Determination of tensile strength and elongation at break 1 Scope This Standard specifies a method for determining the strength and deformation properties of flexible cellular materials when a test piece is extended at a constant rate until it breaks. This Standard applies to the testing of tensile strength and elongation at break of flexible cellular polymeric materials. 2 Normative references The terms in the following documents become the terms of this Standard by reference to this Standard. For dated references, all subsequent amendments (not including errata content) or revisions do not apply to this standard. However, parties to agreements that are based on this Standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this Standard. GB/T 6342, Cellular plastics and rubbers - Determination of linear dimensions (GB/T 6342-1993, IDT ISO 1923:1981) ISO 7500-1:2004, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification of calibration of the force-measuring system ISO 9513, Metallic materials - Calibration of extensometer systems used in uniaxial testing ISO 23529, Rubber - General procedures for preparing and conditioning test pieces for physical test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tensile strength 27 °C ± 2 °C, (65 ± 5) % relative humidity. 5.4.3 In the case of quality-control tests, test pieces can be taken a shorter time (down to a minimum of 12 h) after manufacture and testing carried out after conditioning for a shorter period (down to a minimum of 6 h) in one of the atmospheres specified above. 6 Procedure 6.1 After conditioning as specified in 5.4, measure the thickness of the material at five evenly distributed points in the area from which the test pieces are to be cut. These measurements shall be made in accordance with GB 6342 (ISO 1923) and shall not vary from each other by more than ±2%. If desired, thickness measurements can be performed on cut test pieces, but test pieces whose thickness falls outside these limits shall be rejected. 6.2 Mark the gauge length on each test piece with two reference lines, using a marker with two parallel marking edges. Measure the distance between the inside edges of the lines to an accuracy of ±1% (these lines shall be 25 mm ~ 50 mm apart for type 1 test pieces and not more than 40 mm apart for type 1A test pieces). 6.3 Set the load-indicating device to zero and place a test piece in the grips of the tensile- testing machine, taking care to mount the test piece symmetrically so that the tension will be distributed uniformly over its cross-section. A preload stress of up to 0.1 kPa or a preload extension of up to 0.5% may be applied. When using an extensometer, zero it on completion of the preload. Start the machine at a jaw-separation rate of 500 mm/min ± 50 mm/min and record the maximum force (measured to ±1%) and the distance between the inside edges of the two reference lines (measured to ±1.25 mm) immediately prior to break of the test piece. Reject test pieces which break outside the gauge length, and continue testing until five satisfactory results are obtained. Sufficient material will have to be available to ensure that retesting can be carried out. 6.4 Carry out the test at the same temperature and humidity as that used for conditioning the test material. Note: To reduce break times outside the gauge length, type 1A test pieces are recommended. In the case of the type 1 cutter, the probability of test pieces being rejected can be minimized by selecting a gauge length close to the maximum permitted value of 50 mm. 7 Calculation 7.1 Tensile strength Calculate the average thickness of each test piece. Chinese Standards This is an excerpt of the PDF (Some pages are marked off intentionally) Full-copy PDF can be purchased from 1 of 2 websites: 1. https://www.ChineseStandard.us  SEARCH the standard ID, such as GB 4943.1-2022.  Select your country (currency), for example: USA (USD); Germany (Euro).  Full-copy of PDF (text-editable, true-PDF) can be downloaded in 9 seconds.  Tax invoice can be downloaded in 9 seconds.  Receiving emails in 9 seconds (with download links).  SEARCH the standard ID, such as GB 4943.1-2022.  Full-copy of PDF (text-editable, true-PDF) can be downloaded in 9 seconds.  Receiving emails in 9 seconds (with PDFs attached, invoice and download links). Translated by: Field Test Asia Pte. Ltd. (Incorporated & taxed in Singapore. Tax ID: 201302277C) Linkin: https://www.linkedin.com/in/waynezhengwenrui/ ------ The End ------ ......

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