Patent ID: 6769512
Filing Date: 2004-08-03
Classification: B29C,B29K,B29L,B32B,E04B,G10K

Abstract:
A process for molding an acoustic laminate, comprising the steps:a. layering a mat of sound absorbing material, a porous polyolefin film and at least one face cloth; b. indexing said sound absorbing material, said porous polyolefin film, and said face cloth into a molding cavity; c. molding said sound absorbing material, said porous polyolefin film, and said face cloth in said mold cavity having a pre-selected temperature and pressure to form a laminate; d. said pre-selected temperature and pressure varying a density of said polyolefin film and shape of at least one flow-through aperture; e. said molding causing each of said at least one flow-through aperture to grow from an initial size up to about 600 percent of said initial size.