Reclaiming waste plastics
US4033907A · kind A · utility
21Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 7, 1975 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Jul 7, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In reclaiming thermoplastic materials, process improvements wherein ground particles having molecular orientation are heated sufficiently to relieve orientation stresses and reduce surface area, thereby facilitating subsequent washing, separating and melt processing steps. When refabrication into other articles is intended, the materials can be exposed to a hot caustic solution to eliminate bacteria and mold growth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.