| abstract |
A weatherstrip in which the sliding part of a lip in sliding contact with window glass is covered by a sliding member, wherein the sliding member is composed of a weatherstrip composition containing a polymer A group and a polymer B group, 40 to 100 wt % of the total weight of this composition is accounted for by the polymer A group, and 0 to 40 wt % by the polymer B group, the polymer A group is made up of a domain 1 consisting of crosslinked product of ethylene polymer and the like, and a domain 2 consisting of crosslinked product of ethylene polymer or ethylene/α-olefin copolymer, the storage elastic modulus E′ of domain 1 is at least 3 GPa and less than 9 GPa, and the loss tangent tan δ is from 0.1 to 0.4, the storage elastic modulus E′ of domain 2 is at least 9 GPa and no more than 13 GPa, and the loss tangent tan δ is from 0.1 to 0.3, and the ratio of domain 1 and domain 2 in the polymer A group (domain 1:domain 2) is from 50:50 to 5:95 (wt %), and the polymer B group is made up of a propylene polymer or other thermoplastic resin, in which the storage elastic modulus E′ is from 5 to 17 GPa, and the loss tangent tan δ is greater than 0.4 and no more than 0.7. |