Abstract: A laminated film or sheet structure composed of (i) an adhesive layer (A), (ii) synthetic resin film layers (B.sub.1) and (B.sub.2) monoaxially oriented in a direction oblique to the longitudinal direction of the film, said layers (B.sub.1) and (B.sub.2) being located on both surfaces of said layer (A) in contact therewith, the directions of the orientations of said layers (B.sub.1) and (B.sub.2) crossing each other, and (iii) a substantially non-oriented synthetic resin film layer (C.sub.1) and/or a substantially non-oriented synthetic resin film layer (C.sub.2), said layers (C.sub.1) and/or (C.sub.2) being melt-adhered to both or one of said layers (B.sub.1) and (B.sub.2), said layers (C.sub.o) and/or (C.sub.2) having a lower orientation temperature than said layers (B.sub.1) and (B.sub.2); and a process for production thereof.

Abstract: A laminated film or sheet structure composed of (i) an adhesive layer (A), (ii) synthetic resin film layers (B.sub.1) and (B.sub.2) monoaxially oriented in a direction oblique to the longitudinal direction of the film, said layers (B.sub.1) and (B.sub.2) being located on both surfaces of said layer (A) in contact therewith, the directions of the orientations of said layers (B.sub.1) and (B.sub.2) crossing each other, and (iii) a substantially non-oriented synthetic resin film layer (C.sub.1) and/or a substantially non-oriented synthetic resin film layer (C.sub.2), said layers (C.sub.1) and/or (C.sub.2) being melt-adhered to both or one of said layers (B.sub.1) and (B.sub.2), said layers (C.sub.c) and/or (C.sub.2) having a lower orientation temperature than said layers (B.sub.1) and (B.sub.2); and a process for production thereof.

Abstract: A copolymer consisting essentially of ethylene and an .alpha.-olefin with 5 to 18 carbon atoms, said copolymer having(i) a density of 0.90 to 0.94 g/cm.sup.3,(ii) an intrinsic viscosity [.eta.] of 0.8 to 4.0 dl/g,(iii) a maximum melting point, determined by differential thermal analysis, of 115.degree. to 130.degree. C., and(iv) a g.sub..eta. *(=[.eta.]/[.eta.].sub.l) value of 0.05 to 0.78, in which formula [.eta.] is the intrinsic viscosity of the copolymer and [.eta.].sub.l is the intrinsic viscosity of a linear polyethylene having the same weight average molecular weight determined by the light scattering method as said copolymer.