Patent Number: 6,251,497

Title: Foam board

Abstract: A foam board, for fabrication of sandwich panels made of a face sheets bonded over each side of the foam board, has two opposed planar faces having an embossed pattern in the faces. The embossed pattern has three series of parallel linear indentations, each of the series intersecting the other two series at an angle of 60.degree., such as a series of interlinked equilateral triangles angularly offset from the other two series. The indentations into the surface of the foam boards are sufficiently deep and close together to provide escape paths for volatiles generated during the bonding. In this way, the face sheets may be bonded over the foam board and the escape paths vent the volatiles and prevents the development of excessive pressure between the face sheets that otherwise would interfere with the bonding.

Inventors: Hoopingarner; Neil L. (Everett, WA), Matin; Barry D. (Maple Valley, WA)

Assignee: The Boeing Company

International Classification: B32B 37/14 (20060101); B32B 5/26 (20060101); B32B 5/22 (20060101); B32B 37/16 (20060101); B29C 70/34 (20060101); B29D 24/00 (20060101); B29D 31/00 (20060101); B29C 59/04 (20060101); B29C 70/04 (20060101); B29C 61/06 (20060101); B32B 003/30 ()

Expiration Date: 06/26/2018