| 摘要 |
The inventive closure unit for a container for storing and handling flowable products is made from at least two thermoplastic materials and areas made from different materials fulfil different functions. A basic material (A.2) is used for sealing against the container (G.2), whilst additional materials (B.2,C) e.g. fulfil additional sealing functions, increase mechanical stability, have a reduced permeability, an increased elasticity for an additional opening and closing and/or absorption characteristics. The inventive closure unit is produced by the multimaterial injection moulding process, so that contact surfaces between the different materials can be interconnected by reversible or irreversible positive engagement and/or by more or less pronounced melting into one another. The inventive closure unit is in two parts and comprises a pouring part (1.2) and a closure part (2.2), or is in one part. The two-part closure unit is produced in a single operation in the closed state.
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