Abstract Process for manufacturing draw blow-molded bottles of saturated polyester, which involves the treatment of strengthening the neck of a bottle. In molding according to draw blowing using beads (1), the treatment of strengthening the bottle neck is conducted by effecting injection introduction of saturated polyester into metal mold (2) through inlet (3) provided on the side of bottle neck (1a) as well as through ordinary inlet (4) provided on the bottle bottom side so as to cause the molten material to run along the inside surface of the metal mold, thereby to impart centrifugal force and realize molecular orientation.
A process for producing a saturated polyester bottle by orientation blow molding which comprises preparing a parison by injecting a molten resin into the mold of neck part in such a manner that the injected molten resin circulates vigorously in the cavity, in addition to injecting a molten resin into the mold of bottom and body parts in the conventional manner, and subsequently subjecting thus prepared parison to orientation blow molding.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.