| 摘要 |
<p>Disclosed is a process for producing non-blocking slats of normally tacky amorphous propylene copolymers. The process entails coextrudiing the normally tacky amorphous propylene copolymer with a low viscosity polyolefin such as a polyethylene wax forming a core of amorphous propylene copolymer covered with a sheath of polyethylene wax. The coextruded article is cooled, cut (while exposing less than 40 percent of the core) and then coated with a non-tacky powder; thereby, forming non-blocking slats. Disclosed is also a novel amorphous propylene copolymer composition containing no more than 90 weight percent propylene and up to 70 weight percent of an alpha olefin comonomer having a needle penetration greater than 70 to less than 100 dmm at 23 °C and a Brookfield Thermosel Viscosity below 1000 cP at 190 °C.</p> |
