Method of making laminated PTFE-containing composites and products thereof
US5141800A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1991 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jun 25, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/3878
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Dispersion polymerized PTFE itself, if provided in an unfused state, is sufficiently capable of acting as a pressure sensitive adhesive to facilitate the formation of an initial mechanical bond between components of a laminate such that it may be subsequently heat treated in a relatively short period of time to produce a well-bonded final laminate. This fact makes it possible to prepare a laminate comprising at least one layer containing PTFE by the steps of: PA0 (a) preparing a first dimensionally stable laminate component having two major surfaces, at least one of said major surfaces having an exposed layer comprising unfused PTFE; PA0 (b) preparing a second dimensionally stable laminiate component having two major surfaces, at least a first of said major surfaces being capable of forming an integral bond with the unfused PTFE-containing layer; PA0 (c) bringing said first and second laminate components together so that the exposed layer comprising unfused PTFE and the surface bondable with the unfused PTFE-containing layer are in contact with each other; PA0 (d) applying pressure to the combined laminate components at moderate temperature to achieve intimate contact and form a me…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.