Synthetic resin bottle and process for manufacturing the same
US8980390B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2010 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Sep 5, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A biaxially stretched, blow molded bottle made of a resin comprising at least one of polyethylene terephthalate and a copolymerized polyester comprising ethylene terephthalate. The bottle neck is formed, just as the bottle body is formed, by expanding a body of a preform in a shape of a test tube in a stretching step of the molding process. The bottle neck has an average thickness in a range of 0.6 to 1.8 mm, and at the bottle neck, the resin is partially crystallized and is in an oriented crystallized state. A ratio of an absolute value of crystallization enthalpy, ΔHc, to melting enthalpy, ΔHm (|ΔHc|/ΔHm) of the bottle neck is a value less than 0.1, and a rate of dimensional change in the outer diameter of the bottle neck is 0.2% or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.