-
-
公开(公告)号：EP3335871A1
公开(公告)日：2018-06-20
申请号：EP17208509.4
申请日：2017-12-19
申请人： Adler Evo S.r.l.
IPC分类号： B32B5/02 , B32B5/08 , B32B5/18 , B32B5/24 , B32B5/26 , B32B23/04 , B32B23/10 , B32B27/06 , B32B27/12 , B32B27/32 , B32B37/06
摘要： The present invention relates to a multilayer structure comprising: - a layer α1; - a porous fibrous layer α2 comprising: (i) a fibrous felt material selected from the group consisting of a fiber mixture composition of a synthetic fiber and a glass fiber, a fiber mixture composition of a synthetic fiber and a natural fiber; a natural fiber being said fibrous felt material in amount of at most 70% by weight of the total weight of the porous fibrous layer; and (ii) a phenolic thermosetting resin in amount of at most 30% by weight of the total weight of the porous fibrous layer; - a porous-cellular layer β comprising a semirigid, thermoformable polyurethane foam obtainable by a polyether and diphenylmethane diisocyanate,and - a layer γ, wherein the elastic modulus E of said structure is proportional to the value of the following formula (1) wherein SW is the superficial weight (g/m 2 ) of each layer; n is the number of layers in structure; α is the sound absorption coefficient, for normal angle wave incidence, at specified frequency; t max is the maximum final thickness of the structure and λ is the total thermal conductivity. The present invention relates also to an automotive component made of the multilayer structure according to the invention.
-
搜索结果
2 条记录 (耗时 0.008 秒)
