초록 ▼

Rotational mold grade resin is made by subjecting polyolefin to the following process: (1) polyolefin granules are blended with additives to form a masterblend; (2) the masterblend is intensively mixed with additional resin granules to shape the granules, reduce particle size and disperse additives;

Rotational mold grade resin is made by subjecting polyolefin to the following process: (1) polyolefin granules are blended with additives to form a masterblend; (2) the masterblend is intensively mixed with additional resin granules to shape the granules, reduce particle size and disperse additives; (3) the intermixed material is cooled and (4) large particles are removed and recycled.

대표청구항 ▼

A method of finishing polyolefin thermoplastic granules for rotomolding, which comprises: (a) blending polyolefin thermoplastic granules and additive material at a temperature below the softening point of the thermoplastic to form a masterblend; (b) introducing the masterblend and additional polyole

A method of finishing polyolefin thermoplastic granules for rotomolding, which comprises: (a) blending polyolefin thermoplastic granules and additive material at a temperature below the softening point of the thermoplastic to form a masterblend; (b) introducing the masterblend and additional polyolefin thermoplastic granules into an intensive mixer in an additional resin/masterblend weight ratio between about 5:1 and 50:1, and mixing the same (i) until the temperature of the resin reaches its softening point but below its fluxing temperature whereby the additive material is incorporated into or onto substantially all of the granules (ii) until the particle size of the granules is reduced to the extent that at least about 80 weight percent of the granules are smaller than about 30 mesh, and (iii) until the bulk density of the granules is increased by at least 10%; (c) withdrawing the granules from the intensive mixer and cooling the particles below the fusion temperature of the additive and below the softening point of the resin; and (d) removing essentially all of the particles larger than 30 mesh.