Laminated material comprising an outer sealing layer of thermoplastic material
US4264668A · kind A · utility
42Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Jun 20, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sealable laminated material which consists of an outer thermoplastic layer with a lamination layer arranged adjoining the said layer containing fine-grain carbon material, so-called carbon black, and a binder. The laminated material moreover may contain a carrier layer of e.g. paper, cardboard or plastic material. The outer thermoplastic layer of the laminated material which is intended to act as a sealing layer, can be heated up to sealing temperature in that heat is generated in the adjoining layer containing powdered coal when the latter is subjected to the effect of a high-frequency electric field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.