The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 2001
Filed:
May. 14, 1999
Applicant:
Inventors:
John Leslie Cawse, Cambs, GB;
Ayub Khan, Cambs, GB;
Graham Kemp, Cambs, GB;
Terence Charles Webb, Saffron Walden, GB;
Assignee:
Hexcel Corporation, Dublin, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/00 ; B21D 3/500 ;
U.S. Cl.
CPC ...
C08J 9/00 ; B21D 3/500 ;
Abstract
Expanded cellular structures are formed from dense nonporous cellulose paper with an air permeance of less than 30 ml/min which cellular structure is provided with a shape retention of at least 90%. The shape stability is obtained by forming the cellular structure, spraying with an aqueous liquid and heating, the amount of liquid, time and temperature of heating being selected and sufficient to provide the desired shape retention. The minimum amount of water is at least 30 weight % of dry paper more usually at least 75% with minimum heating of 1 minute at 100° C.