Hot melt thermoplastic adhesive foam system
US4059714A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1976 |
| Grant date | Nov 22, 1977 |
| Priority date | — |
| Expiry date | Aug 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/269
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A novel method and several different unique modifications of apparatus are disclosed for manufacturing a novel adhesive product. The product which results from use of the foam is a pair of substrates adhered together by compressed foam. The adhesive foam is created by intimately mixing air or any relatively inert gas with thermoplastic adhesive while the adhesive is in the liquid state and then pressurizing the liquid/gas mixture so as to force the gas into solution with the liquid adhesive. The liquid adhesive is subsequently dispensed at atmospheric pressure with the result that the gas is released from the solution and becomes entrapped in the adhesive to form a homogenous closed cellular adhesive foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.