The invention discloses an
ethylene-
ethylene-
vinyl acetate copolymer (EVA) refrigerator door seal particle which is composed of an EVA,
polyethylene (PE), modified
polyethylene,
polypropylene (PP), modified
polypropylene, an
ethylene-olefin
copolymer (POE), a mineral filler, a
foaming agent, a nucleating agent, a
lubricant, an
antioxidant, a
photoinitiator, a cross-linking agent, an antibacterial and
mildew-proof agent, a
pigment and the like. The invention further discloses a preparation method of the micro-foaming type EVA refrigerator door seal particles capable of being directly extruded. The preparation method comprises the steps of weighing,
grinding, pre-crosslinking, mixing, banburying and extruding
granulation. The material is ground and pre-crosslinked, and the
foaming agent and the nucleating agent are added, so that when the material is used for producing the refrigerator door sealing strip, direct
extrusion molding can be realized, high-temperature
vulcanization and mold pressurization are not needed, and the micro-foaming refrigerator door sealing material can be prepared. The product is smooth in surface, contains a large number of
microbubbles in the middle, and is high in material tearing strength, large in weld fillet tension, good in rebound resilience, resistant to low temperature, resistant to aging, good in sealing performance and good in heat preservation effect.