Process for preparing EVA foam
US6346207B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jul 23, 2001 |
| Grant date | Feb 12, 2002 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing EVA foam includes the steps of placing an amount of a kneaded composition in a mold such that the volume ratio of the kneaded composition to the mold cavity is about 0.15 to 0.5 and such that the kneaded composition is laid on the lower mold half, heating upper and lower mold halves of the mold in a manner that the temperatures of the upper and lower mold halves are not less than a reaction temperature, at which foaming and curing of the kneaded composition take place, and raising the temperature of the upper mold half to be higher than that of the lower mold half when the kneaded composition expands to a volume such that the volume ratio of the kneaded composition to the mold cavity is about 0.9 to 0.95.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.