Patent ID: 7250211

Claim:
A multilayered polyolefin resin laminate, wherein at least one outermost layer is made of a heat-sealing propylene homopolymer satisfying the following requirements of: (1) having a component soluble in a 25° C. hexane in a content (H25) of 0 to 80% by weight; (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (° C.) satisfying the following formula: Δ H≧ 6×( Tm− 140) wherein ΔH is a melting endotherm of 20 J/g or less, (3) having a meso pentad fraction [mmmm] of from 20 to 60 mol %, (4) having a tensile modulus of 100 MPa or lower, and wherein the heat-sealing propylene homopolymer is produced by polymerizing propylene in the presence of a polymerization catalyst comprising: (A) a transition metal compound represented by the following formula (I): wherein M is a metal element of Groups 3 to 10 or lanthanum series of the Periodic Table; E 1 and E 2 are the same or different and each independently is a ligand selected from the group consisting of substituted cyclopentadienyl, and substituted indenyl; and E 1 and E 2 are cross-linked via A 1 and A 2 ; X is a σ-bonding ligand; and a plurality of X, if any, may be same or different and each X may be cross-linked with another X, E 1 , E 2 or Y; Y is a Lewis base; and a plurality of Y, if any, may be same or different and each Y may be cross-linked with another Y, E 1 , E 2 or X; A 1 and A 2 may be the same or different divalent silylene group for cross-linking two ligands E 1 and E 2 ; q is an integer of 1 to 5 given by the formula, [(valence of M)−2]; and r is an integer of 0 to 3, and (B) at least one component selected from the group consisting of a compound (B-1) capable of forming an ionic complex by reacting with said transition metal compound (A) or a derivative thereof, and an aluminoxane (B-2).