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公开(公告)号：US12122900B2
公开(公告)日：2024-10-22
申请号：US16760089
申请日：2018-10-30
Applicant: DAICEL POLYMER LTD.
Inventor： Takafumi Ueda , Hirotomo Katano , Hiroshi Katayama
CPC classification number: C08K7/06 , C08F110/06 , C08K3/04 , C08L23/12 , H01Q17/00 , H05K9/0081 , C08K2201/004 , C08L2205/025
Abstract: Provided is an electromagnetic wave shielding and absorbing molded article which has an excellent shielding property and absorbency of electromagnetic waves of specific frequencies. The electromagnetic wave shielding and absorbing molded article includes a thermoplastic resin composition containing a thermoplastic resin and carbon fibers. The carbon fibers have a weighted average fiber length in the molded article in a range from 0.05 to 8.0 mm, and the content ratio of the carbon fibers in the molded article is from 0.05 to 45 mass %. The electromagnetic wave shielding and absorbing molded article has a thickness from 0.01 mm to 5 mm, a shielding property of 10 dB or greater and an absorbency of 5% or greater for electromagnetic waves having any frequency in a frequency domain from 59 GHz to 100 GHz.
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公开(公告)号：US11515644B2
公开(公告)日：2022-11-29
申请号：US16760097
申请日：2018-10-30
Applicant: DAICEL POLYMER LTD.
Inventor： Takafumi Ueda , Hirotomo Katano , Hiroshi Katayama
Abstract: Provided is an electromagnetic wave shielding and absorbing molded article which has excellent shielding properties and absorbency for electromagnetic waves having a specific frequency. The electromagnetic wave shielding and absorbing molded article includes a thermoplastic resin composition including stainless steel fibers, and the content ratio of the stainless steel fibers in the molded article is from 0.5 to 20 mass %. The electromagnetic wave shielding and absorbing molded article has a thickness from 0.5 mm to 5 mm, and a shielding property of 10 dB or greater and an absorbency of 25% or greater for electromagnetic waves having any frequency in a frequency domain from 59 GHz to 100 GHz.
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