A polyolefin base resin composition (A) comprising [I] a 1-butene base polymer
in an amount of 1 to 99% by weight, [II] a propylene base resin in an amount of
99 to 1% by weight and a nucleus-forming agent in an amount of 10 ppm or more,
wherein [I] the 1-butene base polymer satisfies the requirements of a melting point,
a stereospecific index, a molecular weight distribution and a weight average molecular
weight. The polyolefin base resin composition (A) provides a film which is excellent
in a flexibility and an impact resistance and which rises in a crystal stabilizing
rate, and the multilayer laminate in which at least one of outermost layers is
constituted from a polyolefin resin composition (B) provides a multilayer film
which is improved in a low temperature heat sealing property and a hot tacking
property making the best use of an excellent characteristic of crystalline polyolefin.
