Abstract: Disclosed is a multiple-layer film having a support film, a first double film laminated thereto, which is formed from a single-ply blown tube collapsed by atmospheric pressure. The support film and the double film laminated thereto are perforated with pinholes. On the side opposite the support film the double film is laminated to a barrier film and the latter is laminated to a weldable layer of film.

Abstract: A mutilayer film, as shown in FIG. 3, consists of a support film (6) and a blown, coextruded composite film (1), which is joined to the support films (6) by means of an adhesive (5) and is interlocked into a tube (1'). The layers of the composite film (1) consist of polyethylenes or polyethylene copolymers of different mechanical shock resistance. At least one of the polyethylenes or polyethylene copolymers has a mechanical shock resistance of more than 100 cN. The composite film (1), interlocked into a tube (1'), has two outer layers (A, A') of corresponding material and thickness and two inner layers, (B, B') of corresponding material thickness. The inner layers (B, B') are connected by interlocking and the outer layers (A, A') are connected to the inner layers (B, B') by melt bonding.

Abstract: A multilayer film and containers made thereof, the film being composed of a four layer composite film produced by flattening upon itself, a two layer coextruded blown tube, the outer layer of said tube being linear polyethylene or high density polyethylene, and the inner layer of said tube being ethylene methacrylic acid copolymer crosslinked with metal ions or an ethylene vinylacetate copolymer, said outer layer and said inner layer of said tube being secured to one another by melt-bonding, whereas the surfaces of said inner layer being secured to one another by a mechanical, detachable heat-bonding, said heat-bonding being achieved by flattening said tube and contacting said surfaces under the influence of heat and pressure.