TPE material magnetic gasket for refrigerator and freezer and manufacture method thereof

Abstract

The invention discloses a TPE material magnetic gasket for a refrigerator and a freezer, comprising a TPE elasticity gasket gum cover provided a magnetic strip which passes through the gum cover. The TPE elasticity gasket gum cover mainly comprises the following raw materials according to the parts by weight: 40 to 45 parts of SEBS, 15 to 18 parts of PP, 3 to 5 parts of PE, 25 to 30 parts of white oil, 5 to 8 parts of CaCO3, 1.3 to 1.5 parts of lubricant, and 0.2 to 0.8 part of antioxidant. The magnetic gasket is applicable to the refrigerator, the freezer and other refrigerating equipment, and has the advantages of environmental protection, insensitiveness to adverse temperature changes, excellent sealing performance and elasticity maintenance, energy consumption, long service life and the like. The invention also provides a method for preparing the TPE material magnetic gasket, which has the advantages of simple process, being applicable to mass production and the like.

Description

technical field [0001] The invention relates to the technical field of magnetic door seals for refrigerators and freezers, in particular to a magnetic door seal made of TPE. The material of the TPE magnetic door seal is a thermoplastic elastomer blended with SEBS / PP. Background technique [0002] At present, most of the door seal materials for refrigerators and freezers sold on the market are made of soft PVC. Due to the characteristics of the material itself, there will be the following deficiencies in the process of use and installation: (1) , Its low temperature resistance is poor, and the PVC rubber sleeve will become brittle below -25°C, and it is quite affected by the change of environmental temperature difference. The temperature changes from ±4 to 5°C, and its Shore A hardness will change accordingly by ±1 degree. Therefore, the temperature difference between summer and winter is likely to affect the sealing performance of its refrigerator door seal, resulting in an ...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the door seal materials for refrigerators and freezers sold on the market are made of soft PVC. Due to the characteristics of the material itself, there will be the following deficiencies in the process of use and installation: (1) , Its low temperature resistance is poor, and the PVC rubber sleeve will become brittle below -25°C, and it is quite affected by the change of environmental temperature difference. The temperature changes from ±4 to 5°C, and its Shore A hardness will change accordingly by ±1 degree. Therefore, the temperature difference between summer and winter is likely to affect the sealing performance of its refrigerator door seal, resulting in an increase in energy consumption; (2), its anti-migration performance is poor, and the plasticizer in PVC is easy to migrate to the absorption of ABS and HIPS. Plastic parts, or the sprayed paint surface of the refrigerator, which will cause the rupture of the plastic parts, or cause corrosion marks with the sprayed paint surface, and seriously cause adhesion; (3), its anti-aging performance is poor, because soft PVC is It is composed of a variety of plasticizers or auxiliary materials. Due to the prolongation of use time, its PVC door seal rubber sleeve will become hard, discolored and aged, which will affect the sealing and appearance and shorten its service life; (4), PVC is polyvinyl chloride The abbreviation of PVC, which itself contains vinyl chloride monomer, is a halogen-containing plastic material and is classified as a non-environmental protection material internationally; (5), due to the low mechanical strength of general soft PVC, the elongation at break is below 200%, The tensile strength is 8N / MM2, and the switch test life of the refrigerator generally does not exceed 100,000 times, which affects its service life; (5), the soft PVC door seal has poor elasticity and is easily affected by processing, packaging, storage, and transportation. Various reasons in the process cause deformation, resulting in poor sealing and running cold, which seriously affect the cooling effect of the refrigerator and increase energy consumption.

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