申请人:Mitsui Chemicals, Inc.
公开号:EP1095979A1
公开(公告)日:2001-05-02
An olefinic thermoplastic elastomer capable of producing a sheet applicable for preparing a covering skin sheet for interior furnishings in automobile superior in the formability, heat resistance, mechnical properties, tensile characteristics, strain restorability and repulsive elasticity together with superior grain retention performance upon a male vacuum forming of the sheet, the said olefinic thermoplastic elastomer comprising an olefinic resin and an olefinic copolymer rubber and having a characteristic feature that it satisfies, when a grained sheet made of the said elatomer is subjected to a male vacuum forming at least at a point of sheet temperature within the range of 130 - 150 °C, the condition that the grain retention rate expressed by the proportion of the grain depth of the sheet retained after the male vacuum forming relative to the grain depth before the male vacuum forming represented by percent meets the relation defind by the following equation (1)% retention of grain ≧ 100 - 2.0× (T-120) in which T represents the sheet temperature upon the male vacuum forming.
一种烯烃类热塑性弹性体,能够制造出适用于制备汽车内饰覆盖表皮的片材,该片材在顺式真空成型时具有优异的成型性、耐热性、机械性能、拉伸特性、应变恢复性和排斥弹性,以及优异的颗粒保持性能,所述烯烃类热塑性弹性体由烯烃树脂和烯烃共聚橡胶组成,并具有满足以下要求的特征、当由所述弹性体制成的粒状片材至少在片材温度 130 - 150 °C 范围内的某一点上进行顺抽真空成型时,以顺抽真空成型后保留的片材粒度深度相对于顺抽真空成型前粒度深度的比例(用百分比表示)表示的粒度保留率满足下式定义的条件 (1)% 粒度保留率 ≧ 100 - 2.0× (T-120),其中 T 代表真空顺压成形时的板材温度。