PURPOSE: To provide an installation in which a use of composit strip is at least enabled to be used in manufacturing a sterile packaging by a method wherein the prior art disadvantages are reduced or removed and a sterile container is manufactured without wasting a protection strip used in manufacturing a thermoplastic container.

CONSTITUTION: There is provided a composite strip for use in manufacturing a sterile packaging thermally formed for liquid and/or semi-liquid substance. The strip is comprised of a protective strip which is adhered by a method wherein a layer defining an inner section of the packaging of its 'inner' surface is made of thermoplastic, heat-sealable and sterile first single layer or multi-layers and a second heat sealed inner surface or sterile surface layer can be separately peeled off. The protective strip is comprised of second single layer or multi-layer strips 102, 19, 146 and 156 in which their compositions are coincided with those of first single layer or multi-layer strips 2, 19, 46 and 58, the inner thermoplastic materials of sterile inner surfaces 108, 147 and 159 are sealed and they can be separately peeled off from the sterile inner surfaces 8, 47 and 59 of inner thermoplastic material of the first single layer or multi- layer strip.