{"id":7189,"date":"2026-09-08T11:01:40","date_gmt":"2026-09-08T03:01:40","guid":{"rendered":"https:\/\/taiteleather.com\/?p=7189"},"modified":"2026-09-08T14:14:46","modified_gmt":"2026-09-08T06:14:46","slug":"synthetic-leather-flex-test","status":"publish","type":"post","link":"https:\/\/taiteleather.com\/pt\/synthetic-leather-flex-test\/","title":{"rendered":"Synthetic Leather Flex Test: The Essential Durability Guide"},"content":{"rendered":"
\"\u5f53\u524d\u56fe\u7247\uff1asynthetic<\/figure>\n\n\n\n

A synthetic leather flex test<\/strong> answers a question that appearance alone never can: how many times can the material bend before its surface starts to crack, peel, or fade? Bag handles, shoe vamps, and seat fold lines all flex thousands of times in real use, and that repeated bending is where cheaper PU leather quietly fails. This guide explains how the test works, which standards apply, and how buyers should read the results.<\/p>\n\n\n\n

What Is a Synthetic Leather Flex Test?<\/h2>\n\n\n\n

A synthetic leather flex test measures how well a material withstands repeated bending. A sample is clamped and flexed back and forth many times, then examined for damage to the surface coating and the backing fabric. The goal is to simulate months or years of real-world folding in a controlled, repeatable way.<\/p>\n\n\n\n

This matters because flex cracking is one of the most common early failure modes in finished products. A panel can look flawless on the roll yet develop hairline cracks at the fold within weeks of use. Static inspection cannot reveal that weakness, so a synthetic leather flex test is the only reliable way to expose it before mass production.<\/p>\n\n\n\n

How the Bally Flexometer Method Works<\/h2>\n\n\n\n

The most widely used approach for a synthetic leather flex test is the Bally flexometer method. A rectangular specimen is mounted between two clamps, formed into a fold, and then flexed repeatedly through an angle of about 22.5\u00b0<\/strong>. The machine counts cycles automatically, so testing can run to tens of thousands of flexes without manual effort.<\/p>\n\n\n\n

Room temperature vs cold flex<\/h3>\n\n\n\n

Flexing can be run at room temperature or at low temperature. Cold (low-temperature) flexing is more demanding because coatings become stiffer and more brittle in the cold, which better predicts performance in winter climates or refrigerated environments.<\/p>\n\n\n\n

Dry vs wet conditions<\/h3>\n\n\n\n

Tests may also be run dry or wet. Wet flexing simulates exposure to perspiration, rain, or humid conditions, which can accelerate coating breakdown compared with a dry sample.<\/p>\n\n\n\n

Test Standards: ISO 5402-1 and ISO 32100<\/h2>\n\n\n\n

Two international standards govern flex testing of leather-like materials. ISO 5402-1<\/strong> (current edition EN ISO 5402-1:2022) specifies the flexometer method for leather and its surface finish, while ISO 32100<\/strong> covers the flex testing of coated fabrics, which includes most PU and PVC synthetic leather. You can review the scope on the official ISO 5402-1 standard page.<\/a><\/p>\n\n\n\n

One important point: there is no universal “pass” number of cycles. The required cycle count and acceptance criteria depend on the end use and the customer’s specification \u2014 a wallet, a work boot, and a car seat have very different demands. Treat any single headline figure with caution and always define the target against the actual application.<\/p>\n\n\n\n

How to Read Synthetic Leather Flex Test Results<\/h2>\n\n\n\n

After the agreed number of cycles, the flexed area is inspected against several criteria:<\/p>\n\n\n\n