公开(公告)号：JPH08252871A

公开(公告)日：1996-10-01

申请号：JP5623295

申请日：1995-03-15

Applicant: MITSUI PETROCHEMICAL IND

Inventor： HATA ISAO ,  OGATA OSAMU ,  HAMA TAKASHI

IPC: B65D21/08 ,  B29C49/04 ,  B29C49/08 ,  B29D22/00 ,  B29K67/00 ,  B29L22/00 ,  B65D1/02

Abstract: PURPOSE: To obtain a foldable hollow vessel having an excellent pressure resistance strength by orientation blow molding in a mold having a bellows like cavity. CONSTITUTION: A polyester hollow vessel has a port 1 and a bellows like body 3 is such a manner that the thickness of the body 3 preferably has a range of 70 to 200μm or preferably 90 to 120μm. If the thickness of the body has the range, it has excellent flavor barrier properties, and even if the vessel is repeatedly used and folded, the decrease in the strength of the vessel is small. When the vessel is molded by using the mold having a bellows like cavity by a blow molding method or preferably a biaxial drawing blow molding method, it is desired that the drawing magnification of the body is 10 times or more or preferably 12 to 20 times, and the longitudinal drawing magnification is twice to four times, and the lateral drawing magnification is preferably 2.5 to 6 times.

公开(公告)号：JPH05105807A

公开(公告)日：1993-04-27

申请号：JP4677991

申请日：1991-03-12

Applicant: MITSUI PETROCHEMICAL IND

Inventor： OGATA OSAMU ,  HATAHO SUSUMU

IPC: B29B11/08 ,  B29K67/00 ,  C08L67/00 ,  C08L67/02

Abstract: PURPOSE:To provide a polyester composition having a climbing-temperature crystallization temperature lower than that of the starting polyester and a preform and a blow molding made therefrom and having excellent transparency and heat resistance. CONSTITUTION:A polyester comprising a starting polyester and another polyester prepared by passing a starting polyester in a hot molten state through a molding machine, wherein the latter polyester is present in an amount of 2-20wt.%. A preform made therefrom. A blow molding made therefrom.