Preform for biaxial stretching blow molding, and container
AssigneeDiscma AG
InventorsTamotsu TOYODA, Masaaki SASAKI, Shinichi TABATA
Life of this patent
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Abstract
A preform for biaxial stretching blow molding. The preform being formed into a closed-end cylinder by direct blow molding and which is to be shaped into a container using a pressurizing liquid medium. The preform has either a single-layer or a multilayer structure constituted of one of a polyethylene resin having an MFR of 1.0-1.5 g/10 min. or a polypropylene resin having an MFR of 0.8 to 2.3 g/10 min.
Claims18
A preform shaped by direct blow molding for biaxial stretching blow molding into a container using a pressurizing liquid medium, preform comprising:
- a closed end generally cylindrical body having at least one layer thereof being constituted of a polyethylene resin having an MFR of 1.0 to 1.5 g/10 min.
A preform shaped by direct blow molding for biaxial stretching blow molding into a container by using a pressurizing liquid medium, comprising:
- a closed-end generally cylindrical body of a polypropylene resin having an MFR of 0.8 to 2.3 g/10 min.
A method of forming a container from a preform, the method comprising:
- extruding a resin tube structure, the resin being one of a polyethylene resin having an MFR of 1.0 to 1.5 g/10 min. and polypropylene resin having an MFR of 0.8 to 2.3 g/10 min.;
- forming a preform from the tube structure by direct blow molding using pressurized air as the blowing medium, the preform having a closed end generally cylindrical body;
- and
- forming a container from the preform by biaxial stretching blow molding the preform into the container using a pressurizing liquid as the blowing medium.
Dependencies are inferred from the claim text.