TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The crosslinking catalyst has a melting point of at least 50 degrees C. The crosslinking catalysis occurs primarily at lamination temperature conditions and not at lower temperatures. The crosslinking catalyst has a chemical formula of R-SO3H, R2Sn(IV)(OZ')2, (R2Sn(IV)(OZ'))2O, a group of formula (ia), R1R2R3R4Ti(IV), or R1R2R3R4Zr(IV) (preferably R2Sn(IV)(OZ')2 or (R2Sn(IV)(OZ'))2O; especially selected from 1,3-diacetoxy-1,1,3,3-tetrabutyldistannoxane and dibutyltin maleate).R=a monovalent 1-24C hydrocarbyl;R1 to R4=monovalent 1-24C alkoxy, 1-24C aryloxyl, or 1-24C carboxyl;X and Y'=divalent 1-6C alkoxy, 1-6C aryloxyl, or 1-6C carboxyl;Z'=1-24C containing organic group having a functional group that can form a coordinate bond with Sn.    TECHNOLOGY FOCUS - POLYMERS - Preferred Film: The film has at least two thermoplastic polyolefin copolymer layers where prior to lamination: the film comprises at least one thermoplastic polyolefin copolymer surface layer comprising the alkoxysilane groups; and regarding the crosslinking catalyst (i) the layer or layers comprising the alkoxysilane groups, including surface layer(s), comprise the crosslinking catalyst, and/or (ii) layer or layers comprising alkoxysilane groups do not contain crosslinking catalyst and have a facial surface in adhering contact with a layer of a thermoplastic polyolefin copolymer comprising the crosslinking catalyst (preferably two alkoxysilane-containing surface layers according to (ii) which do not contain crosslinking catalyst and each have an interior facial surface in adhering contact with a facial surface of a catalyst-containing layer). The film also comprises catalyst-containing layer(s) that are an ethylene/ alpha -olefin copolymer that has a density less than 0.93 g/cm3 and a melt index less than 75 g/10 minutes. The film comprises a layer including crosslinking catalyst (0.001-0.01 wt.%). The crosslinking catalyst and alkoxysilane groups are not in the same layers and are in separate alternating layers that have facial surfaces in adhering contact and the film comprises at least 5 total layers. Preferred Components: The thermoplastic polyolefin copolymer in the alkoxysilane-containing layers is a thermoplastic polyolefin copolymer grafted with alkoxysilane compound, and the polyolefin copolymer is an ethylene/ alpha -olefin copolymer that, before grafting, has a density less than 0.93 g/cm3 and a melt index less than 75 g/10 minutes. EXAMPLE - No suitable example given.