Method for the lamination of foam including a reinforcing scrim
AssigneeThe Dow Chemical Company
InventorRobert A. Hay, II
Life of this patent
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Abstract
Thermoplastic foam bodies are readily generally continuously laminated together wherein the joint therebetween contains a reinforcing scrim. Friction on each of the foam bodies is generally equalized by positioning the scrim relative to both major faces of the heating element employed for the lamination to obtain a desired degree of curvature in the laminate.
Claims10
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent foam surfaces of adjacent foam bodies are heated by means of a generally planar heating element having first and second opposed heating surfaces to a temperature sufficient that on contact of the adjacent foam surfaces and cooling thereof, a rigid bond is achieved between the bodies, the improvement which comprises positioning the scrim relative to the major surfaces of the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent foam surfaces of adjacent foam bodies are heated by means of a generally planar heating element having first and second opposed heating surfaces to a temperature sufficient that on contact of the adjacent foam surfaces and cooling thereof, a rigid bond is achieved between the bodies, the improvement which comprises passing the reinforcing scrim, the scrim being in the form of one scrim folded over the heating element or the scrim comprising two separate portions, a portion disposed on each of the major heating surfaces, over the major surfaces of the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent surfaces of adjacent foam bodies are heated by means of a generally planar heating element to a temperature sufficient that on contact of the adjacent surfaces and cooling thereof, a rigid bond is achieved between the bodies therein, the improvement which comprises passing the reinforcing scrim through the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
Dependencies are inferred from the claim text.