Thermoplastic elastomer particle for dish washing machine and preparation method

Abstract

The invention discloses a thermoplastic elastomer particle for a dish washing machine and a preparation method. The thermoplastic elastomer particle for the dish washing machine is prepared from the following components of hydrogenated styrene-butadiene block copolymer, polypropylene, ethylene-vinyl acetate copolymer, filling oil, filler, pigment, an antioxidant, a lubricant and a mildew-proof agent. The preparation method of the thermoplastic elastomer particle for the dish washing machine comprises the following steps of weighing, uniformly mixing, granulating, extruding and forming. The thermoplastic elastomer particle for the dish washing machine has the advantages that the anti-aging property is good, the oil-resistant and heat-resistant properties are good, the sealing property is good, and the service life is long; phthalate is not contained, the foreign odor is not produced in the production process, the injury to a human body is avoided, the secondary processing can be performed, the mechanical property is good, and the size stability is good; the thermoplastic elastomer particle is suitable for being popularized and applied to the manufacturing of sealing materials or sealing strips of the dish washing machine.

Description

technical field [0001] The invention relates to the field of dishwasher sealing materials and preparation methods, in particular to thermoplastic elastomer pellets used in dishwashers and a preparation method. Background technique [0002] Conventional dishwasher seals are usually prepared from ethylene propylene diene monomer (EPDM). The EPDM material has excellent heat resistance, good aging resistance, and good compression deformation performance. However, there are the following disadvantages in sealing materials for dishwashers: 1. The foamed EPDM material needs to be vulcanized and foamed successively, and the processing process is complicated; 2. For EPDM ( EPDM) material, its vulcanization and foaming process are unstable, the scrap rate is high, and the material after molding can no longer be processed again, resulting in the cost of EPDM rubber (EPDM) type sealing strip being higher than other materials; 3 . The EPDM material before foaming has poor compensation,...

AI Technical Summary

Problems solved by technology

However, there are the following disadvantages in sealing materials for dishwashers: 1. The foamed EPDM material needs to be vulcanized and foamed successively, and the processing process is complicated; 2. For EPDM ( EPDM) material, its vulcanization and foaming process are unstable, the scrap rate is high, and the material after molding can no longer be processed again, resulting in the cost of EPDM rubber (EPDM) type sealing strip being higher than other materials; 3 . The EPDM material before foaming has poor compensation, which seriously affects the sealing effect; the foamed EPDM foam holes increase liquid penetration, which seriously affects the overall sealing effect; 4. Through the oil resistance (No. 3 oil) test of various EPDM foamed and unfoamed sealing strips produced by different manufacturers, it is shown that the surface of the foamed sealing strip is prone to bulges, The overall volume expansion rate of the material is greater than 25%, and the overall volume expansion rate of the material affects the compactness of the foam

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