Patent ID: 6323269
Filing Date: 2001-11-27
Classification: B29C,B82Y,C01P,C04B,C08F,C08J,C08K,C09C

Abstract:
A mineral-containing thermoplastic granule for incorporation in a thermoplastic material to produce a thermoplastic end product, the granule comprising 85% to 92% by weight of an inorganic particulate material having a particle size distribution in accordance with the equation:cumulative percent finer than D=(D.sup.n -D.sub.S.sup.n)/(D.sub.1.sup.n -D.sub.S.sup.n).cndot.100where D=particle size, D.sub.S =smallest particle size and is in the range of 10 to 0.1 .mu.m, D.sub.1 =largest particle size and is in the range of 100 to 1.0 .mu.m, and n=distribution modulus and has a value appropriate for carbonate particles assumed to be approximately spherical, at least 0.1% by weight of an additive comprising a blowing agent, and the balance comprising a thermoplastic binder.