초록 ▼

A method of surface bonding elements with a two component polyurethane foam, particularly where one of the surfaces to be joined is relatively porous, including contoured fiberglass panels, carpet, foam and fibrous paneling and the resultant bonded structure. The method includes spraying the liquid

A method of surface bonding elements with a two component polyurethane foam, particularly where one of the surfaces to be joined is relatively porous, including contoured fiberglass panels, carpet, foam and fibrous paneling and the resultant bonded structure. The method includes spraying the liquid foamable polyurethane in a fine mist under pressure on one of the surfaces to be bonded to form dispersed discrete liquid polyurethane droplets; permitting the polyurethane droplets to foam and expand in discrete foam pods; applying the second surface to be joined while said polyurethane foam pods are between 20% and 60% of full cure; and, completing the cure of the polyurethane foam, preferably under moderate heat and pressure.

대표청구항 ▼

A method of bonding two elements in surface-to-surface contact, wherein at least one of the element surfaces is relatively porous, comprising the following steps: (a) spraying under pressure a fine mist of a two component foamable liquid polyurethane on one of said element surfaces forming discrete

A method of bonding two elements in surface-to-surface contact, wherein at least one of the element surfaces is relatively porous, comprising the following steps: (a) spraying under pressure a fine mist of a two component foamable liquid polyurethane on one of said element surfaces forming discrete dispersed generally spaced small droplets of liquid foamable polyurethane on said one element surface; (b) allowing said polyurethane droplets to foam and expand in discrete foam pods to between 20 and 60% of full cure, the spacing between said droplets being sufficient to permit said pods to expand and skin prior to fully contacting adjacent pods, forming said discrete urethane foam pods; and (c) applying a second element surface and completing the cure of said polyurethane pods.