Metal crown lid internal gasket sealing material with oxygen absorbing function

Abstract

The invention relates to a metal crown lid internal gasket sealing material with an oxygen absorbing function. The metal crown lid internal gasket sealing material is prepared by respectively adding 2-30 parts by weight of single-components of different types or an oxygen absorbent of a compound component by taking a thermoplastic elastomer as a base material. The metal crown lid internal gasket sealing material can be processed into a metal crown lid gasket by adopting an existing non-oxygen absorbing gasket machining process, can absorb residual oxygen of a headspace in an absorbing bottle while keeping the original machining and sealing property of the gasket, and ensures that the oxygen concentration is reduced to a limit oxygen concentration of 0.5ml / l from 210ml / l, thereby prolonging the quality guarantee period.

Description

technical field [0001] The invention relates to a sealing material for an inner pad of a crown crown, in particular to a sealing material for an inner pad of a crown crown with an oxygen-absorbing function based on a high molecular thermoplastic elastomer. Background technique [0002] At present, there are mainly two types of materials for the inner pads of crown covers for beer and beverages in China: PVC or thermoplastic elastomers. Because PVC contains plasticizers such as phthalates, stabilizers and vinyl chloride monomer residues, etc., and there is also the problem of halogen pollution in the disposal of PVC waste products, its use is increasingly restricted. Since 2011, domestic enterprises have replaced PVC materials with thermoplastic elastomer materials for crown cover gaskets in batches. [0003] In the existing process, before the crown cap is sealed, deoxygenation measures such as carbon dioxide filling, nitrogen filling, vacuuming and adding anti-oxidant isov...

AI Technical Summary

Problems solved by technology

[0005] CN1743241A patent discloses an oxygen-absorbing and oxygen-resistant plastic beer bottle cap gasket material. The plastic bottle cap adopts a multi-layer structure, which is relatively complicated and cannot be used for crown caps.

[0006] CN101024728A patent discloses a kind of high polymer oxygen-absorbing material for food packaging and its application as packaging bottle, bag, crown cover gasket, but from its disclosed test results, the best result can only reduce the oxygen concentration to 184ml / l, actually not suitable for use as a crown gasket

However, this method can only be completed after the cap making process, because the substance similar to hemoglobin cannot withstand the high temperature above 100 ℃ for bottle mat compression molding

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