Door seal and manufacturing method thereof

Abstract

The invention relates to a door seal and a manufacturing method thereof. The door seal comprises a door seal part and an elastic part which are formed by co-extrusion heat fusion, wherein the elastic part is mounted on a door; one end of the door seal part is in integral seamless connection with the elastic part, and the other end of the door seal part is arranged on a door frame in a pressure welding manner; the door seal part is made of PVC; the elastic part is made of a thermoplastic elastomer material; a cavity is formed between the door seal part and the elastic part; and a magnetic stripe is arranged in the cavity. As the door seal is made of the elastomer material, the door seal and a refrigerator have excellent airtightness, and accordingly, the quality problems of seam forming, untight closure, condensation and the like of the door seal of the refrigerator are effectively reduced; no physical or chemical reaction occurs between the elastomer material and a coating on a side plate of the refrigerator, so that the problem of adhesion between the side plate of the refrigerator and the door seal is solved; as the two materials are combined through co-extrusion, the process cost and the energy consumption are low; and as the structure of the door seal is not changed, the die cost is not increased.

Description

technical field [0001] The invention relates to the technical field of door seal materials for refrigerators and freezers, in particular to a door seal and a preparation method thereof. Background technique [0002] At present, most of the sealing strips used in refrigerators and freezers are made of soft PVC materials, and for PVC sealing strips, the main components are PVC powder resin, plasticizers, seasonings and some stabilizers. The plasticizer in the PVC door seal is easy to move out under high temperature and high humidity conditions, and most of the side panels of refrigerators or freezers are PCM or VCM boards, because the surfaces of PCM or VCM boards have polymer coatings. The research results show that the plasticizer in the traditional PVC door seal is easy to migrate with the side panel coating, and the PVC door seal is easy to stick to the side panel of the refrigerator or freezer under high temperature and high humidity conditions, and it cannot be opened; ...

AI Technical Summary

Problems solved by technology

The research results show that the plasticizer in the traditional PVC door seal is easy to migrate with the side panel coating, and the PVC door seal is easy to stick to the side panel of the refrigerator or freezer under high temperature and high humidity conditions, and it cannot be opened; The plasticizer in the PVC door seal formula is easy to migrate out under wet conditions, and the PVC door seal material has poor elasticity and poor sealing performance

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