Plaque board with polyurethane core and method for construction

Details Plaque board with polyurethane core and method for construction Plaque board with polyurethane core and method for construction

1974-07-15

1975-05-25

Dier, Philip

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

428 45, 428322, 264 465, B32B 518, B32B 104

Patent

active

039590500

ABSTRACT:
A plague board comprises a solid polyurethane core enclosed by a high grade wood which forms all exterior surfaces thereof. A wooden frame is secured between the peripheries of a pair of spaced panels formed of flat sheets of veneer. The polyurethane core fills the interior of the frame between the veneer panels and is firmly bonded to the wooden frame and veneer. A method disclosed for constructing the plaque board and other like articles comprises inserting a measured amount of liquid polyurethane foam in the interior space between the attached frame and panels and pressing the opposite veneer panels inwardly as the polyurethane expands outwardly to solidify and become bonded to the frame and panels.

REFERENCES:
patent: 2924861 (1960-02-01), Viets
patent: 3090078 (1963-05-01), Ackles
patent: 3215581 (1965-11-01), Carlson et al.
patent: 3240846 (1966-03-01), Voelker
patent: 3560285 (1971-02-01), Schroter et al.
patent: 3697633 (1972-10-01), Edgar

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