Title:
【発明の名称】低粘性ポリオレフィンを含む粘着性アモルファスプロピレンコポリマー組成物を共押出しする方法およびそれから製造された製品
Document Type and Number:
Japanese Patent JP3457328
Kind Code:
B2
Abstract:
Disclosed is a process for producing non-blocking slats of normally tacky amorphous propylene copolymers. The process entails coextruding 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.
Inventors:
Somers, Marc Stacey
Application Number:
JP53410296A
Publication Date:
October 14, 2003
Filing Date:
April 25, 1996
Export Citation:
Assignee:
Eastman Chemical Company
International Classes:
B29C48/18; C08L23/14; B29C48/00; B29C48/04; (IPC1-7): C08J3/12; B29B9/06
Other References:
【文献】欧州特許出願公開410914(EP,A1)
【文献】英国特許出願公開2220209(GB,A)
【文献】英国特許出願公開2220209(GB,A)
Attorney, Agent or Firm:
Takashi Ishida (3 others)