Mico-crosslinking thermoplastic elastomer and preparation method thereof

The invention relates to the technical field of high-molecular materials, and provides a mico-crosslinking thermoplastic elastomer and a preparation method thereof. The mico-crosslinking thermoplastic elastomer comprises the following components: a styrene type thermoplastic elastomer, synthetic rubber, white mineral oil, a foaming agent, a crosslinking agent, an antioxidant, a light stabilizer, zinc oxide, zinc stearate, abrasion-resistant agent and nano calcium carbonate. The preparation method comprises the following steps: placing the component materials into an internal mixer, and carrying out internal mixing for 10-15 minutes; controlling discharge temperature at 130-135 DEG C; then pressing into a uniform flaky shape by virtue of a double-roller open mill for discharge; finally cutting a material into a specified dimension, placing into a large-flake vulcanizing machine, carrying out vulcanizing forming, and controlling vulcanizing temperature at 170-175 DEG C and vulcanizing time at 180-350 seconds so as to obtain the mico-crosslinking thermoplastic elastomer. The mico-crosslinking thermoplastic elastomer disclosed by the invention has the characteristics of low density, high abrasion resistance, uniformity in froth, good low temperature flexibility, dimensional stability and the like.