Polyoxymethylene compositions containing at least one encapsulated nucleating agent

摘要

Incorporation of an encapsulated nucleant made from an encapsulant polymer and a nucleant, wherein the encapsulant polymer is selected from linear low density polyethylene, high density polyethylene, and polypropylene, into polyoxymethylene compositions results in a decrease in the center line porosity of polyoxymethylene extruded stock shape parts, without also reducing the rate of extrusion. The compositions are especially useful for extrusion into stock shape parts, such as rod, slab, sheet, and tube stock, which are used for machined parts (like artificial limbs and complex gears), die cut parts (like washers and gaskets), and control cable inners.