Container closure seal and container closure

By using polymer compound compositions without PVC, especially TPS and co-PP, the migration problem of container closures in fat-containing or oil-containing fillers is solved, and the container closure seal is realized without migration, cutting and good sealing properties is achieved at high temperature, which is suitable for rapid closure and heat treatment of large open containers.

CN120464049APending Publication Date: 2025-08-12ACTEGA DS GMBH
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Patent Information

Application Number
CN202510515375.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2019-12-10
Filing Date
2020-03-18
Publication Date
2025-08-12

AI Technical Summary

Technical Problem

Existing PVC-based container closure seals have migration problems in fat- or oil-containing fillers, and do not comply with environmental protection and legal provisions, especially in large open containers, which are difficult to maintain sealing and thermal stability.

Method used

Using PVC-free polymer compound compositions, including specific types of TPS and co-PP, seals are formed by extrusion and stamping processes to ensure that no migration at high temperatures and good sealing properties are maintained.

Benefits of technology

It realizes container closure sealing parts that do not migrate, do not cut off, have good sealing and comply with environmental protection regulations at high temperatures, and are suitable for rapid closure and heat treatment of large open containers.

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Abstract

The invention relates to a container closure seal, in particular for fat-containing fillers, comprising a polymer compound which substantially or completely constitutes the seal, a) wherein the polymer compound is free of PVC and comprises at least one TPS, the polymer compound comprises at least two different co-PP or at least one co-PP having a Shore A hardness of at most 80, a crystallization enthalpy of at most 30 J / g and a melting point of at least 155 DEG C, b) and the polymer compound typically has a Shore A hardness of between 30 and 85 at 70 DEG C and a melt flow rate of less than 20 g / 10 min (5 kg / 190 DEG C).
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Citation Information

Patent Citations

  • Polymer compound for seals for use with fat-containing filling materials

    EP2470435A1

  • Appliance and process for introducing sealing compound into lug caps

    US5763004A

  • Pvc-free closures

    WO2012152329A1