EXPANDABLE SHEET MATERIAL MANUFACTURE

摘要

The material (for use in acoustic or RF attenuation) is made by: a) providin g a mixture comprising a matrix of elastomer having mixed therewith a sublimab le foaming agent which can sublime to produce at least one gaseous decompositio n product which is reactive with the matrix to produce at least one solid reaction product; and b) forming the mixture into at least one sheet.