Invention Grant
- Patent Title: Hot press cushioning material
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Application No.: US15714535Application Date: 2017-09-25
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Publication No.: US11077642B2Publication Date: 2021-08-03
- Inventor: Takamitsu Ozeki , Akira Yoshida
- Applicant: YAMAUCHI CORPORATION
- Applicant Address: JP Osaka
- Assignee: YAMAUCHI CORPORATION
- Current Assignee: YAMAUCHI CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Ditthavong, Steiner & Mlotkowski
- Priority: JPJP2012-180927 20120817
- Main IPC: B32B5/26
- IPC: B32B5/26 ; D04H1/4342 ; D04H1/4374 ; D04H1/498 ; B30B15/06 ; B32B5/06 ; B32B5/02 ; B32B7/02 ; B29C43/20 ; B29C43/36

Abstract:
A hot press cushioning material includes: a first nonwoven fabric forming an inner layer; and second nonwoven fabrics placed on both surfaces of the first nonwoven fabric and forming outer layers. Copolymerized para-aramid fibers having a basis weight of 80 to 400 g/m2 are used as a material of the second nonwoven fabrics. Fibers that are more rigid than the copolymerized para-aramid fibers are used as a material of the first nonwoven fabric. Each of the first nonwoven fabric and the second nonwoven fabrics has a heat resistant temperature of 270° C. or more.
Public/Granted literature
- US20180015690A1 HOT PRESS CUSHIONING MATERIAL Public/Granted day:2018-01-18
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