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公开(公告)号:US20230040449A1
公开(公告)日:2023-02-09
申请号:US17872016
申请日:2022-07-25
申请人: Carl Freudenberg KG
发明人: Sarah Ziem , Mauro Davanzo
摘要: A fiberball includes: a core region; and a shell region. A fiber density in the core region is higher than a fiber density in the shell region. At least 50% by weight of fibers contained in the fiberball, based on a total weight of the fibers contained in the fiberball, have a length of at least 60 mm.