Sterilizable PVC-Free Closures
AssigneeActega DS GmbH
InventorDany Mängel
Life of this patent
Estimating the term…
Abstract
The present invention relates to compositions (compounds) which can be used as seal material in vessel caps under sterilization conditions. More specifically, the invention relates to such compositions that are suitable for vessel caps or vacuum caps that can be unscrewed, such as cam screw caps and in particular Press-on/Twist-off® caps, and that demonstrate a reduced migration of undesirable substances.
Claims36
A vessel cap made of metal or plastic for a vessel for receiving foods or beverages, comprising a seal insert made of a seal material which comprises at least one polymer mixed with further substances, wherein the seal material comprises no polyvinyl chloride (PVC), wherein the seal material is composed such that the seal insert withstands a sterilization at temperatures of above 100° C. and up to 132° C., and wherein the seal material, in a dynamic mechanical thermal analysis (DMTA), demonstrates a heating curve for the phase angle tan (delta) the inflection point of which lies above the required sterilization temperature.
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A vessel cap made of metal or plastic for a vessel for receiving foods or beverages, comprising a seal insert made of a seal material which comprises at least one polymer mixed with further substances, wherein
- the seal material comprises no PVC, and
- the seal insert can be pasteurized at temperatures up to 98° C. and can be sterilized at temperatures up to 132° C.,
- the seal material comprises a thermoplastic elastomer (TPE), and optionally a PP or (co)PP and/or an oil component,
- and the vessel cap is a cam screw cap, a hooded lid, a crimp-on cap, a metal cap that can be rolled on, or a Press-on Twist-off® cap.
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Dependencies are inferred from the claim text.