Written on 09.01.2013 - Technology
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Lubrizol offers soft plasticiser-free TPUs for footwear applications

The Lubrizol Corporation offers Estane soft plasticiser-free thermoplastic polyurethanes (TPUs) for athletic footwear applications. An alternative to conventional plasticised TPUs, Lubrizol says its TPUs provide an option for manufacturers sensitive to today’s more stringent environmental requirements.

According to the company, conventional soft TPUs contain a phthalate-type plasticiser that may be subject to regulation by environmental agencies. In addition, such plasticisers can gradually migrate to the surface of the moulded product, creating poor aesthetics and altering the bonding strength.

Lubrizol’s line of plasticiser-free TPUs are said to exhibit excellent flexibility, softness, abrasion resistance and mouldability. Its soft plasticiser-free Estane TPUs are available in both a polyester series (Estane T460AH, Estane T460A, Estane T465A, and Estane T470A) and a polyether series (Estane T365A and Estane T370A). The Estane soft plasticiser-free TPUs range between 60A to 77A Shore hardness and offer high transparency and UV stability versus plasticiser-containing TPUs, qualities which best fit various accessory shoe components. These products are also ideal as replacements for rubber and PVC in various moulding applications, says the company.