{"id":6521,"date":"2025-02-27T16:21:52","date_gmt":"2025-02-27T08:21:52","guid":{"rendered":"https:\/\/www.qualitester.com\/?post_type=product&p=6521"},"modified":"2025-02-27T16:43:52","modified_gmt":"2025-02-27T08:43:52","slug":"crumple-flex-tester-astm-f392","status":"publish","type":"product","link":"https:\/\/www.qualitester.com\/nl\/product\/crumple-flex-tester-astm-f392\/","title":{"rendered":"GFT Kreukel Flex Tester"},"content":{"rendered":"

De crumple flex tester<\/strong> is designed to simulate the mechanical stresses that packaging materials endure when subjected to flexing, twisting, and compression. These actions often lead to flex cracks and perforations, which can compromise the packaging’s integrity and the product’s safety. The tester helps manufacturers gauge the material’s resistance to these stresses and evaluate its performance under repeated strain.<\/p>\n

The primary purpose of the crumple flex tester<\/strong> is to assess the flex durability of flexible barrier materials, such as plastic films, coated papers, and laminates, which are commonly used in packaging. The tester operates by subjecting samples to a combination of twisting and linear compression motions that simulate the physical forces a package might face during handling, transport, and distribution.<\/p>\n

ASTM F392 and the Gelbo Flex Test Method<\/h3>\n

De ASTM F392<\/strong><\/a> standard, titled “Standard Test Method for Flex Durability of Flexible Barrier Materials,” is the benchmark for evaluating the flex durability of materials used in flexible packaging. The crumple flex tester complies with this standard and uses the Gelbo Flex Test Method<\/strong> to quantify how well materials resist damage when subjected to repeated flexing.<\/p>\n

De Gelbo Flex Test Method<\/strong> evaluates the material’s ability to withstand flexing over time, which is crucial in preventing packaging failure. The method involves repeatedly flexing a sample, usually a film or coating, through a twisting and compression motion. Over time, this flexing can cause microscopic cracks or perforations, which the tester identifies, providing critical data on the material’s durability.<\/p>\n

How the Crumple Flex Tester Works<\/h3>\n

The crumple flex tester works by mounting a sample, typically measuring 200 mm by 280 mm, on mandrels. These mandrels then initiate the flexing process, which involves a twisting motion of 440 degrees over 90 mm of the stroke followed by horizontal compression. This process is repeated at a speed of 45 cycles per minute, allowing the tester to simulate real-world conditions accurately.<\/p>\n

The tester offers different testing modes based on the ASTM F392<\/strong> standard:<\/p>\n