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HG/T 4993-2016: Cellular material for shoes. Determination of resilience Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
HG/T 4993-2016: Cellular material for shoes. Determination of resilience---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/HGT4993-2016HG NATIONAL CHEMICAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 61.060 Y 78 Record number. 55286-2016 Cellular material for shoes - Determination of resilience Issued on: JULY 11, 2016 Implemented on: JANUARY 01, 2017 Issued by. Ministry of Industry and Information Technology of the PRC Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Principles ... 4 4 Test devices ... 4 5 Test pieces ... 6 6 Test piece conditioning and test environment ... 7 7 Test procedures ... 7 8 Test result ... 7 9 Test report ... 8ForewordThis Standard is drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by China Petroleum and Chemical Industry Federation. This Standard shall be under the jurisdiction of Subcommittee on Rubber Shoes, China National Standardization Technical Committee on Rubber and Rubber Products (SAC/TC35/SC9). Drafting organizations of this Standard. Fujian Putian Xinda Shoes Co., Ltd., Taizhou Baolite Shoes Co., Ltd., Jinjiang Hualong Shoes Co., Ltd., Quanzhou Baofeng Shoes Co., Ltd., Comprehensive Technical Service Center of Putian Entry-Exit Inspection and Quarantine Bureau, Shanghai Warrior Shoes Co., Ltd., HengYu Instrument (China) Limited. Main drafters of this Standard. Tang Zhenhua, Tang Chaoyang, Chen Shaohua, Chen Weijun, Liu Long, Zhang Zhilei, Ma Qinghua, Xu Jianying, Zhang Yinglong. Cellular material for shoes - Determination of resilience1 ScopeThe Standard specifies the test method for resilience of cellular material for shoes. This Standard applies to the testing of cellular material for shoes.2 Normative referencesThe following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document. GB/T 2941 Rubber - General procedures for preparing and conditioning test pieces for physical test methods3 PrinciplesA pendulum of a certain mass and size falls from a fixed height to the surface of test piece. The height at which the pendulum bounces is measured. The percentage of the ratio of the bounce height of the pendulum to the falling height is calculated.4 Test devices4.1 Resilience testing machine It includes the base, test piece holder (as shown in Figure 1), impact pendulum (as shown in Figure 2), resilience angle dial. The mass of the entire equipment is at least 100 times the mass of pendulum. 4.2 Test piece holder It can hold the test piece firmly; but cannot deform the test piece (See Figure 1). 3 - Impact head; 4 - Impact hammer; 5 - Pendulum rod. Note. The impact energy of the impact pendulum applied to the test piece is 0.2 J. The impact rate is 2 m/s. Figure 2 -- Schematic diagram of impact pendulum 4.4 Resilience angle dial The dial is 1/4 of a circle, evenly divided into 90 divisions, 1° per division. 4.5 Horizontal deviation of pendulum rod Less than 0.45 mm per 100 mm length. 4.6 Damped oscillation of pendulum For free oscillation without the pointer, the number of times shall be no less than 300 times. For oscillation with the pointer, the number of times shall be no less than 35 times. 4.7 Resilience indication error The resilience indication error is ±0.5 %. 4.8 Pendulum vertical suspension The pendulum vertical suspension is 90°±10′.5 Test pieces5.1 The test piece shall have upper and lower parallel and flat surfaces. 5.2 The test piece size shall be at least 80 mm×80 mm. The thickness shall not be less than 50 mm. 5.3 If the thickness of test piece is less than 50 mm, it shall be superimposed to 50 mm. Adhesives can be used; but shall not be used in the center, shall be applied to the four sides of test piece to bond them. The bonding width shall be no more than 5 mm. For molded products, the upper skin shall be removed. 5.4 The number of test pieces is 3. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
