QB/T 2224-2012 PDF EnglishUS$115.00 · In stock · Download in 9 seconds
QB/T 2224-2012: Footwear. Performance requirement for uppers low-temperature flexing resistance Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid QB/T 2224: Historical versions
QB/T 2224-2012: Footwear. Performance requirement for uppers low-temperature flexing resistance---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QBT2224-2012QB LIGHT INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 61.060 Classification No.. Y78 Record No.. 36727-2012 Replacing QB/T 2224-1996 Footwear - Performance Requirement for Uppers Low- Temperature Flexing Resistance Issued on: MAY 24, 2012 Implemented on: NOVEMBER 1, 2012 Issued by. Ministry of Industry and Information Technology of the People’s Republic of China Table of ContentsForeword... 3 1 Scope... 4 2 Normative References... 4 3 Terms and Definitions... 4 4 Requirements... 4 5 Cold Resistance Tester... 5 6 Sampling and Environmental Conditioning... 5 7 Test Procedures... 5 8 Inspection Rules... 6 9 Judgement... 6 Footwear - Performance Requirement for Uppers Low- Temperature Flexing Resistance1 ScopeThis Standard specifies the performance requirements, test methods, and inspection rules for the low-temperature flexing resistance of footwear uppers. This Standard applies to various upper materials.2 Normative ReferencesThe following documents are essential to the application of 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. GB/T 2703 Footwear - Vocabulary GB/T 22049 Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear QB/T 1187 Footwear - Principle of Inspection and Marking, Package, Transportation, and Storage3 Terms and DefinitionsFor the purposes of this Document, the terms and definitions given in GB/T 2703 and the following apply. 3.1 Flexing resistance at low temperature The upper material's resistance to repeated flexing under low temperature conditions.4 RequirementsConduct a flexing resistance test on upper materials at a temperature of (-10±2) °C, requiring superior products to be flexed for no less than 60,000 times, and qualified products to be flexed for no less than 30,000 times. When various material components reach the specified flexing times, no visually observable cracks or ruptures (including pulp or surface cracks) shall appear on the specimens.5 Cold Resistance Tester5.1 The temperature control in the refrigeration chamber shall meet (-10±2) °C with an accuracy of 1.0°C. 5.2 The V-shaped clamps in the refrigeration chamber shall meet the following conditions. 5.2.1 The axes of each pair of clamps shall be collinear. 5.2.2 The clamps shall be installed in the refrigeration chamber (5.1) with an adjustable bending angle from 0° ~ 90°, with an error of ±2°. 5.2.3 Each pair of clamps shall consist of a fixed clamp and a movable clamp. When the cold resistance tester is in operation, the movable clamp reciprocates, causing the distance between the two clamps to repeatedly change, thereby repeatedly flexing the specimen. 5.2.4 When the two clamps are moving apart, they shall be (28.5±1.0) mm apart; and when they are moving closely, they shall be (9.5±1.5) mm apart, resulting in a stroke of (19.0±2.5) mm.6 Sampling and Environmental Conditioning6.1 Number of specimens. When sampling, there shall be no fewer than 4 specimens (2 in the horizontal and 2 in vertical directions); the specimen is 70 mm long and 65 mm wide. 6.2 Specimens must not exhibit defects such as scratches, impurities, stains, or abrasions. 6.3 Specimen thickness must be the original material thickness. Specimens with a thickness of no more than 2.5 mm are recommended for testing.7 Test Procedures7.1 Adjust the clamps to the extended position and securely clamp the test pieces in the clamps. Position the test pieces symmetrically with the outer layer facing outward, with the length of ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of QB/T 2224-2012 be delivered?Answer: The full copy PDF of English version of QB/T 2224-2012 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of QB/T 2224-2012_English with my colleagues?Answer: Yes. The purchased PDF of QB/T 2224-2012_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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