Extensible nonwovens facilitate contouring of the material to the respective application:
- Hygiene products: In diaper ears and other stretch applications, elastic nonwovens enhance this characterisation. They flexibly adapt to the wearer’s body, adjusting to any movement and optimising comfort in use. Extensible under a low load, with excellent recovery properties.
- Automotive, technical applications & home textiles: Malleability is a key requisite when nonwovens have to follow a contour. These nonwovens facilitate processing and dependably insulate or protect complex components.
- Construction: Used in repairs to a façade for example, elastic nonwovens are applied in crack bridging. They adapt to expansion or shrinkage of building materials and are capable of recovering their original dimensions, offering a long-term solution to construction defects.
Extensibility is measured by determining the maximum tensile force and the maximum elongation according to WSP 110.4 in machine direction and cross machine direction. Sandler performs these tests in our in-house laboratory.
Elastic properties are determined by employing the so-called hysteresis test following DIN 53835. During these tests, the material is repeatedly stretched up to a defined maximum tensile force. The maximum elongation achieved at the predefined force as well as the material’s permanent set are measured. The ideal permanent set value is required to be as low as possible, signifying that the material does not wear out during use. These tests are also performed in Sandler’s in-house laboratory.