Polyolefin composite and preparation method thereof
A composition, polyolefin foaming technology, applied in the direction of coating, etc., can solve the problems involving less foam core layer composition and preparation method, poor fluidity, etc., and achieve the effect of increased melt viscosity and uniform and dense bubbles
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Embodiment 1
[0045] Embodiment 1 polyolefin foaming composition, and is used for making rotomolding foamed article
[0046] a. Preparation of middle foam layer resin:
[0047] Ⅰ. Mixing: Put 100 parts by weight of linear low-density polyethylene (LLDPE) into a high-speed mixer that has been heated to 60°C in advance, start the high-speed mixer, and when the temperature of LLDPE rises to 60°C, add pre-mixed uniform cross-linked 0.5 parts by weight of foaming agent, 0.1 parts by weight of blowing agent, and 0.2 parts by weight of nucleating agent are mixed at 60°C for 5 minutes and then discharged, sealed and stored for granulation;
[0048] II Granulation: control the temperature at 10±2°C above the melting point of LLDPE, extrude and granulate, and store in a sealed container; it is used for grinding and screening;
[0049] Ⅲ Grinding and sieving: After grinding, sieve the powder with a particle size of 20-30 meshes for rotational molding;
[0050] b. Surface layer 1 resin preparation: ...
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