Sughrue, Mion, Zinn, Macpeak & Seas
Foamed particles of propylene-type polymer
 Foamed particles of propylene-type polymer of substantially non-crosslinked type, wherein the propylene-type polymer particles have a Melt Index of from 0.1 to 20, said polymer is at least one member selected from the group consisting of: PA1 (a) a soft polypropylene homopolymer having an <mmmm> partial rate of a stereoregular pentad partial rate by .sup.13 C-NMR Spectrum of from 45 to 85% and a fusion heat quantity of from 5 to 22 cal/g; and PA1 (b) a random copolymer of propylene and an .alpha.-olefin having a carbon number of 4 or more, or a random copolymer of propylene, an .alpha.-olefin having a carbon number of 4 or more, and ethylene, in which the content of the .alpha.-olefin having a carbon number of 4 or more is from 7 to 30 mol %, the content of ethylene is 5 mol % or less, and the cold xylene-soluble matter of said copolymer is from 15 to 60 wt %, said polymer particles being foamed with the use of an evaporation type blowing agent. 
Sumitomo Chemical Company, Limited
C C
C08J C08J
inventional additional
Satoru Tadatoshi Hideaki
Hosoda Ogawa Yamada