TPE door seal granular material for refrigerator door

Abstract

The invention discloses a TPE door seal granular material for a refrigerator door. The TPE door seal granular material is prepared from the following components in parts by weight: 40-50 parts of POE plastic, 30-50 parts of PP elastomer, 15-20 parts of SEBS, 5-15 parts of naphthenic oil, 0.2-0.6 part of an antioxygen, 0.2-0.6 part of a lubricant, 10-20 parts of a filler, and 0-5 parts of paint. The TPE door seal granular material has the characteristics of low temperature resistance, ageing resistance, better welding effect, high product yield, good sealing effect and the like, improves a sealing property of refrigerators and freezers, and prolongs the self service life per se.

Description

[0001] technical field [0002] The invention belongs to the technical field of magnetic door seals for refrigerators, freezers and other electrical appliances, and in particular relates to a TPE refrigerator door seal pellet with better welding effect. [0003] technical background [0004] Due to sealing requirements, magnetic door seals are used for the opening and closing of doors such as refrigerators and freezers. Most of the door seals are made of soft PVC and magnetic strips. However, affected by the characteristics of the PVC material itself, it has the following disadvantages: (1) The softness is not high, the elasticity is low, and the sealing performance is poor. (2) High and low temperature performance is poor, it becomes soft and easy to adhere to the box at high temperature, and it is brittle at low temperature, loses elasticity and is easy to damage. (3) It is not environmentally friendly. The ortho-benzene plasticizer is toxic and not suitable for contac...

AI Technical Summary

Problems solved by technology

However, affected by the characteristics of the PVC material itself, it has the following disadvantages: (1) The softness is not high, the elasticity is low, and the sealing is poor

(2) High and low temperature performance is poor, it becomes soft and easy to adhere to the box at high temperature, and it is brittle at low temperature, loses elasticity and is easy to damage

(3) Not environmentally friendly, phthalic plasticizers are toxic and not suitable for contact with food. The material requirements for parts of the plasticized part must be corrosion-resistant, wear-resistant and have high polishing performance

However, due to the light density and poor dispersion of white mineral oil, it is easy to migrate to the surface. During the welding process, white mineral oil is easy to migrate out, and the welding of TPE door seals is poor, resulting in low yield and poor tension of welding angle, which affects The sealing performance of the door seal is a waste of electric energy

Moreover, because the welding tension is too small, it will cause the welding angle to crack during the suspension or transportation process, and the welding angle will be torn if the welding angle is too small in the actual assembly, resulting in waste of materials.