Foam laminate product and process for production thereof
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United States of America Patent
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Mar 8, 2011
Grant Date -
Jan 27, 2005
app pub date -
Jul 22, 2004
filing date -
Jul 25, 2003
priority date (Note) -
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Abstract
A laminate product comprising a foam core having a pair of opposed major surfaces and a cover layer secured with respect to each major surface is described. The cover layer is essentially free of fibreglass and comprises a polymeric substrate having disposed therein a plurality of porous material layers. It has been found that the use of fibreglass as a reinforcing material (and other sheet materials having a tensile modulus of greater than or equal to about 0.5 GPa when measured pursuant to ASTM D 5034) in a foam laminate product can be avoided by using a porous material layer in place of the fibreglass. In a preferred embodiment of the invention, the porous material layer has a tensile modulus less than that of fibreglass mat yet can be used to produce a foam laminate product having significantly higher strength properties.
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