Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1977-12-16
1979-12-25
Drummond, Douglas J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156322, 264 22, 264 48, B29C 1902, B65C 925, B29H 720
Patent
active
041804279
ABSTRACT:
A layer of foamed thermoplastic material, such as polystyrene foam, is coated on at least one of its surfaces with a sheet of covering material. The covering material can be kraft paper, metal foil, a fabric or similar sheet-like material. To assure adequate adherence of the covering material to the foamed material, a corona discharge is directed against the surface of the foamed material to burn away any impurities and destroy the residual monomer film. The covering material is heated to a temperature above the melting point of the foamed material and then applied to the treated surface in a way that the foam cells are not damaged. During the laminating operation, heat from the covering material aids the bonding of the foamed material to the covering material. Further, the heat transmitted to the foamed material causes it to expand and reduce in density.
REFERENCES:
patent: 3180778 (1965-04-01), Rinderspacher et al.
patent: 3333032 (1967-07-01), Dickinson
patent: 3651181 (1972-03-01), Ramaika
patent: 3823047 (1974-07-01), Colombo
patent: 3930917 (1976-01-01), Esakov
Drummond Douglas J.
Primex Plastics Co.
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