ISO 7854 Coated Fabric Flex Durability Test - Crumple Method

ISO 7854

Coated Fabric Flex Test and Crumple Method

ISO 7854 defines standardized methods to evaluate the resistance of rubber- or plastics-coated fabrics to damage by repeated flexing. These materials are widely used in products like rainwear, inflatable structures, protective clothing, and medical materials. Flexing, folding, or twisting during use can lead to cracks, delamination, or coating failure, so assessing their flex durability is crucial for product performance and lifespan.

Get Quote

Understanding ISO 7854 and Its Importance

The standard includes three different test methods, with Method C – the Crumple/Flex method – being one of the most comprehensive approaches. It simulates real-world flexing conditions by subjecting coated fabrics to continuous twisting and compression, making it essential for industries where mechanical stress and repeated motion are common.

The Crumple Flex Tester and Method C Explained

The crumple flex tester is the key apparatus for ISO 7854 Method C. In this method, a rectangular coated fabric sample is sewn into a cylindrical shape and mounted between two rotating and reciprocating discs.

During the crumple method test:

  • One disc oscillates through a 90° angle, applying a twisting motion.
  • The other disc moves axially, compressing the cylinder lengthwise.
  • These combined actions simulate repeated bending, twisting, and compressing, similar to stresses encountered in actual product use.

The test continues for a specified number of cycles or until visible cracks, coating breakdown, or material failure appear. The results provide a quantifiable measure of flex resistance and material durability.

Coated Fabric Flex Test and Its Objectives

The coated fabric flex test measures how well a coated textile withstands deformation without surface damage or loss of functionality. The main objectives include:

  • Determining the resistance to cracking or coating separation during repeated flexing.
  • Comparing material performance under simulated usage conditions.
  • Ensuring product reliability in demanding applications such as automotive interiors, medical packaging, and outdoor gear.

By following ISO 7854, manufacturers can ensure consistent quality, improve product design, and validate supplier materials against recognized international benchmarks.

Assessing Results: Indicators of Flex Durability

After testing, samples are visually examined for:

  • Surface cracks or coating delamination
  • Color or gloss change
  • Loss of adhesion or waterproofing

A higher number of cycles before damage indicates better flex durability. These results guide quality control teams and material engineers in optimizing formulations, coatings, and substrate combinations.

Applications of the ISO 7854 Flex Resistance Test

The flex resistance test plays an important role in industries such as:

  • Textiles and coated fabrics: for tents, tarpaulins, and protective garments.
  • Medical devices and packaging: ensuring material reliability in sterilization wraps or blood pressure cuffs.
  • Automotive and aerospace: evaluating flexible interior materials and seals.
  • Consumer goods: such as raincoats, footwear, and upholstery.

By adopting ISO 7854-compliant testing, companies ensure that their coated fabrics can maintain functionality and aesthetics under repeated stress.

Choosing the Right Crumple Flex Tester

For laboratories and manufacturers needing reliable ISO 7854 Method C testing, Cell Instruments offers the GFT Crumple Flex Tester.

The GFT is designed for accurate, repeatable flex resistance evaluation of coated fabrics, laminates, and similar flexible materials. It features:

  • Precisely controlled oscillation and compression mechanisms.
  • Adjustable speed and stroke settings for standard or custom test conditions.
  • Automated cycle counting and safety functions.
  • Compatibility with ISO 7854, ASTM F392, and related flex durability standards.

With Cell Instruments GFT, users can ensure accurate and efficient crumple flex testing while maintaining compliance with global testing norms.

ASTM F392

Contact Us Get ISO 7854 Testing Solution

Choosing a dependable instrument like Cell Instruments’ GFT not only improves testing efficiency but also enhances credibility in material evaluation. For industries where coated fabric reliability matters, ISO 7854 flex durability testing is a key step in ensuring consistent quality and customer satisfaction.

en_USEN
es_ESES de_DEDE fr_FRFR it_ITIT arAR ko_KRKO jaJA ru_RURU pt_PTPT viVI id_IDID belBE bg_BGBG bs_BABS cs_CZCS da_DKDA elEL etET fiFI he_ILHE hi_INHI hrHR hu_HUHU kkKK lt_LTLT lvLV ml_INML my_MMMY nn_NONN nl_NLNL pl_PLPL ro_RORO sk_SKSK sr_RSSR sv_SESV ta_LKTA sl_SISL ukUK uz_UZUZ tr_TRTR sqSQ en_USEN
滚动至顶部

GEt a free offer and method?

Fill out the form below, and we will be in touch shortly.