Novel migration-resistant PVC sealing material and application thereof

By introducing microbead modifiers and optimizing the plasticizer ratio into the refrigerator sealing strip, the adhesion problem caused by plasticizer migration is solved, the low-temperature performance is improved, and the cost is reduced, forming a kind of sealing strip suitable for refrigerators. High performance, low cost materials.

CN111647235AActive Publication Date: 2020-09-11HEFEI HUALING CO LTD +2
5 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2019-03-04
Publication Date
2020-09-11

AI Technical Summary

Technical Problem

The plasticizer in existing refrigerator sealing strips is easy to migrate out, causing adhesion problems. Although polyester plasticizer is not easy to migrate, it has poor low-temperature performance and high cost, which limits its large-scale application.

Method used

Introduce new microbead modifiers and screen suitable plasticizer types, optimize the ratio of microbead modifiers and plasticizers, and form a new PVC sealing material, including PVC resin, microbead modifiers, DOTP or TOTM is used as the main plasticizer, ESO and DOS are used as auxiliary plasticizers, combined with appropriate amounts of fillers and stabilizers.

Benefits of technology

It achieves the excellent migration resistance, low temperature resistance and mechanical properties of PVC sealing materials, reduces material costs, avoids adhesion problems and improves refrigerator sealing performance.

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Abstract

The invention relates to a novel migration-resistant PVC sealing material and application thereof. The PVC sealing material is prepared from, by weight, 40-50 parts of PVC resin, 20-40 parts of a plasticizer, 10-25 parts of filler, 1-5 parts of a stabilizer and 2-10 parts of a microsphere modifier. The sealing material not only has excellent migration resistance and low temperature resistance, butalso has excellent mechanical properties and good resilience, and ensures good sealing of refrigeration equipment such as refrigerators and the like; and meanwhile, the price is relatively low, costcontrol is facilitated, and the sealing strip is very suitable for being widely popularized as a refrigeration equipment sealing strip.
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Citation Information

Patent Citations

  • Microspheres

    CN101378831A

  • Thermoexpandable thermoplastic microspheres

    CN102633936A

  • Expandable microsphere filling modified polypropylene composite material and preparation method thereof

    CN103709509A

  • Microfoaming functional masterbatch, door seal, preparation method of door seal and refrigeration equipment

    CN107501789A

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    CN108084483A

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