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Highlighted Companies

  • Eagle Eyes China Inspection Company (China): Eagle Eyes (CHINA) Quality Inspection Co.,Ltd. is a professional Third Party China Inspection company, offering...
  • Upper Leather Flexing Tester Iso 4643 - China

    price: contact company for price

    meet the standard

    gb/t20991-2007 - en iso230344-2012 - satra tm25 - iso 4643 and other standards.

    main uses

    vamp vamp leather extension testing machine with a certain frequency of zigzag test, observe the change of the surface of the test piece, whether the surface of the wrinkle and crack and its severity to evaluate the zigzag resistance of the test material.

    product advantages

    measures key durability: evaluates the flexing endurance and resistance to cracking of shoe upper materials, a crucial factor for footwear lifespan and appearance.

    standard compliant: designed to meet relevant national and international standards (satra tm25 - iso 4643 - gb/t 20991 - en iso 20344 sections on upper flexing) for testing upper material flexing resistance.

    simulates wear on upper materials: replicates the bending and stretching stresses experienced by the shoe vamp during walking.

    evaluates resistance to wrinkles/cracks: provides a method to assess the material's propensity to develop surface damage from flexing.

    provides objective visual assessment criteria: evaluation is based on observing and assessing the severity of wrinkles and cracks according to standard criteria after testing.

    multiple testing stations: available with options for testing multiple samples simultaneously (4 or 12), increasing testing throughput.

    controllable test parameters: allows for precise control of flexing speed, stroke, and clamping angle.

    quantitative result: results are based on the number of flexing cycles performed until a specified damage level or after a fixed number of cycles.

    technical specifications

    1 - expansion speed: (300±30)r/min 2 - expansion stroke: (19±1.5)mm 3 - sample size: (64±1)mm*(64±1)mm 4 - number of test pieces: 4 - 12 samples 5 - clamping angle: (40±1)° 6 - volume: 70cm*36cm*37cm 7 - power source: ac220v, 10a


    Company Contact:


    • Phone: 15715691047

    • Address: Jindu Road, Minhang District, Shanghai , China

    • Email: Email


    Published date: October 21, 2025

    • Business Description: standard international group (hk) limited was established in 2003 and headquartered in hong kong.

      the branch company in mainland is shanghai general standard textile testing technical company.

      in changsha, wuhan, jinan, shenyang, chengdu, hangzhou and other places, standard groups has set up offices and after-sales service centers.

      standard groups is an integrated supplier specialized in providing material test instruments and “the whole laboratory program” solutions.

      the main products cover many areas: textile and apparel, leather and footwear, flammability testing, filter material testing, automotive interior, toy testing, non-woven and geo-membrane, carpet testing, luggage/furniture/office furniture testing, material and parts of automotive, weathering and light stability testing, ovens and environmental testing chambers, salt fog chambers, materials testing machines, 3d body scanning and manikin, air quality monitoring and measurement, package material testing, electrical safety testing, optical and spectroscopy instruments, lighting and color assessment, microscopy and legal inspection, and relative testing services.

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