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US 9,708,478 B2Granted
Sealing compounds with barrier properties
AssigneeActega DS GmbH
InventorsWaldemar Eichler, Rüdiger Wittenberg
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Abstract
The invention relates to a polymer compound for a PVC-free sealing system for container closures, which is equipped with at least one oxygen-consuming compound, in which the Shore D hardness of the polymer compound is at least 20 and the polymer compound has a melt flow index (190° C., 5 kg) of at least 5.
Claims31
A polymer-containing composition for a PVC-free sealing insert for a container closure which comprises a blend comprising:
- at least one polymer that has barrier properties to oxygen and volatile compounds;
- at least one oxygen depleting compound;
- and
- optionally at least one additive
- wherein the polymer-containing composition:
- contains no more than 10% by weight of an oil;
- has a Shore D hardness of at least 20;
- and
- a melt flow index (190° C., 5 kg) of at least 5.
6 more elements
Dependencies are inferred from the claim text.