SHAPE RETAINING FILM AND PRODUCTION METHOD THEREFOR, LAMINATED FILM-TAPE, SELF-ADHESIVE FILM-TAPE, ANISOTROPIC THERMAL CONDUCTIVE FILM, AND SHAPE RETAINING FIBER

摘要

The purpose of the present invention is to provide a shape retaining film excellent in shape retention, and further having high tensile elasticity and good longitudinal tear resistance. The shape retaining film is composed of at least one base material layer containing an ethylene polymer that has the density of 900 kg/m3 or more, and the weight-average molecular weight (Mw)/number-average molecular weight (Mn) of 5 to 20, and at least one soft layer containing a high polymer material. The ethylene polymer is an ethylene homopolymer or an ethylene-alpha-olefin copolymer in which the content of a-olefin unit having 3 to 6 carbon atoms is less than 2% by weight, The high polymer material has the melting point (Tm2) lower than the melting point (Tm1) of the ethylene polymer, the tensile elasticity of 10 to 50 GPa, and the recovery angle of 65° or less as a result of 180° bending, test.