公开(公告)号：US4915885A

公开(公告)日：1990-04-10

申请号：US210261

申请日：1988-06-23

申请人： Nadka V. Avramova ,  Isak A. Avramov ,  Stoyko C. Fakirov ,  Jerold M. Schultz

发明人： Nadka V. Avramova ,  Isak A. Avramov ,  Stoyko C. Fakirov ,  Jerold M. Schultz

IPC分类号： B29C55/00 ,  B29C71/02 ,  C08J5/18 ,  C08L67/02

CPC分类号： C08J5/18 ,  B29C55/005 ,  C08L67/02 ,  B29C2071/022 ,  B29C71/02 ,  B29K2067/00 ,  C08J2367/02

摘要： A process of preparing a homogeneous amorphous polymeric blend of polyethyleneterephthalate (PET) and polybutyleneterephthalate (PBT) which includes intimately mixing the PET and PBT at a weight ratio of about 10:90-90:10, melting the mixture at 290.degree.-330.degree. C., cooling the mixture to 0.degree.--194.degree. C. by extruding it onto rollers maintained in a cooling bath and orienting the polymer of the resulting continuous shaped object at room temperature to a draw ratio of about 5:1, with subsequent annealing at about 120.degree.-180.degree. C. for about one hour.