Fabrication compression/resiliency

Resilience of textile fabrics when compressed in the bent state is related to wrinkle resistance and retention of shape, drape, and hand. Resilience is an important parameter for evaluating blankets, wearing apparel in which warmth is a factor, pUe fabrics including carpets, and bulk fiber utilization in mattresses, cushions, etc. The general method for determining compressional resilience is to compress and unload the material cycHcahy, creating a plot of compressive force versus fabric thickness. 

Disclosed are ethylene-vinyl acetate/ethylene-styrene interpolymer blends, which are useful in preparing foams exhibiting improved compression set resistance, dimensional stability and rebound resilience at similar foam densities than known foam systems, e.g. EVA. The crosslinked foams are particularly useful in fabricating footwear and gaskets. 

Elastic recovery or resilience is the recoveiy of length upon release of stress after e xtension or compression. A fiber, fabric, or carpet must possess this property in order to spring back to its original shape after being crushed or wrinkled, Polyolefin fibers have poorer resilience than nylon this is thought to be partially related to the creep properties of the polyolefins. 

For small samples, it is recommended that polypropylene [e.g. Nalgene ] bottles be used with a cap insert inside the neck. This type of plastic packaging is extremely resilient to compression and damage. Glass bottles should be avoided where possible. All very small quantities should be shipped as a combination package - an inner package in a UN approved box containng a suitable fabric adsorbent... 

Thermoplastic polyurethane elastomers are polymers that bridge the gap between rubbers and plastics. They can be used in a wide range of properties, from hard rubbers to soft engineering thermoplastics as they are elastic and melt-processable. They can be processed on extrusion as well as injection, blow and compression molding equipment. They can be vacuum-formed or solution-coated and are suited for a wide variety of fabrication methodologies. They provide a considerable number of physical property combinations high resilience, good compression set, resistance to abrasions, tears, impacts, weather, and even hydrocarbons. Such materials... 

Thermal Wrap - an easy to handle aerogel fabric blanket delivered in rolls that provide multiple options for rapid and automated installation in various applications. The wrap is compressible and conformable, without sacrificing tensile strength and resilience (Figure 38.9). 

Flexible polyurethane foams are principally characterized by physical properties of density, compression set or indentation modulus, and resiliency. These properties are important in end uses such as cushioning in home, office, and automotive seating fabric backing and insulation carpet underlay and packaging. The end-use requirements of these applications relate well to the elastomeric and load-bearing properties of such foams. 

---