Patent ID: 8349425
Filing Date: 2013-01-08
Classification: B29B,B29C,B65D,Y10T

Abstract:
1. A biaxially stretched polyester bottle having a bottle body portion obtained by biaxially stretch-blow-molding a preform of a polyester resin, wherein the bottle body portion has an average thickness of not larger than 250 μm, a central part of the bottle body portion elongates more in the circumferential direction than in the longitudinal direction in a tensile test at room temperature, and has an elongation factor in the circumferential direction of not smaller than 100%, wherein said biaxially stretched polyester bottle is produced by a method of stretching a polyester preform heated at a stretching temperature by using a stretch rod, further, followed by stretching by blowing the air, wherein the air is blown into the preform at such a flow rate that the preform does not come in contact with the stretch rod but an end thereof and does not come in contact with the surface of a metal mold at the time of effecting the stretching by using said stretch rod.