Methods for blow molding solid-state cellular thermoplastic articles
US8591799B2 · kind B2 · utility
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3References
15Claims
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Key dates
| Filing date | Mar 26, 2012 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Mar 26, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1376
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing cellular thermoplastic articles. The process comprises the steps of treating a solid parison made from a thermoplastic material with a saturating gas at an elevated pressure for a period of time to provide a gas-saturated parison; heating the gas-saturated parison to prepare a cellular parison; placing the cellular parison in a mold; and blowing a molding gas into the cellular parison to expand the cellular parison into the shape of the mold to provide a shaped cellular article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.