Stretch blow molded container and production process thereof
US6001439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Apr 25, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24992
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a stretch blow molded container formed from a thermoplastic resin material which comprises polyglycolic acid having PA1 (a) a repeating unit represented by the following formula (1): ##STR1## (b) a melt viscosity, .eta.* [as measured at a temperature of (the melting point, Tm of the polymer+20.degree. C.) and a shear rate of 100/sec] of 500-100,000 Pa.multidot.s; PA1 (c) a melting point, Tm of at least 180.degree. C.; PA1 (d) a melt enthalpy, .DELTA.Hm of at least 20 J/g; and PA1 (e) a density of at least 1.50 g/cm.sup.3 as measured in an unoriented, crystallized form, wherein the stretch blow molded container has tensile strength (in a circumferential direction) of at least 100 MPa and a carbon dioxide permeability (as measured at a temperature of 23.degree. C. and 80% relative humidity; in terms of the thickness of 50 .mu.m) of 300 cc/m.sup.2 .multidot.day.multidot.atm or smaller at the body sidewall thereof, and a production process thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.