Patent ID: 6527995
Filing Date: 2003-03-04
Classification: C08G

Abstract:
A process for producing a thermoplastic polyurethane film comprising sintering in a heated mould at least one particulate thermoplastic polyurethane, wherein said thermoplastic polyurethane has:(i) a melt index of 20 to 100, measured at 190Â° C. and under an applied force of 21.2N; (ii) a relative solution viscosity of 1.15 to 1.45, the relative solution viscosity being determined by, measuring the viscosity (a) of a solution of 0.4 grams of said thermoplastic polyurethane in 99.7 grams N-methyl-2-pyrrolidone containing 0.1% dibutylamine at 25Â° C., measuring the viscosity (b) of N-methyl-2-pyrrolidone containing 0.1% dibutylamine at 25Â° C., and dividing viscosity (a) by viscosity (b); and (iii) a Shore A hardness of 80 to 98.