Abstract: Useful composites and methods of using such composites are provided. The composites include an outer layer containing a first polymeric material, an intermediate layer circumscribed by the outer layer and containing a second polymeric material, and an inner layer circumscribed by the intermediate layer and containing a third polymeric material. The inner layer, in combination with the intermediate layer, is structured and effective to reinforce the composite relative to a substantially identical composite without the inner layer. The present composites can be produced using co-extrusion processing.

Abstract: Polymer processing systems are provided including an extrusion assembly, a specially configured decompression chamber assembly, and a die assembly. Such systems are effective to provide shaped polymer products having reduced extrusion markings.

Abstract: Polymer processing systems are provided including an extrusion assembly, a specially configured decompression chamber assembly, and a die assembly. Such systems are effective to provide shaped polymer products having reduced extrusion markings. Methods of using such systems are also provided.

Abstract: Composite fence and decking components, for example, rails, posts and planks, are provided which generally include a weatherable outer layer, a core layer made of a thermoplastic polymeric composition and a wood component in an amount effective as a filler, and an inner layer made of a thermoplastic material. The layers are configured so as to form a generally central hollow space. The components are light weight and inexpensive to manufacture. The components can be manufactured by using a single coextrusion process to produce a cylindrical form. The cylindrical form is passed through a reshaping die to form a composite having a desired cross sectional form, for example, a composite with a substantially square or rectangular cross section.

Abstract: Composite fence and decking components, for example, rails, posts and planks, are provided which generally include a weatherable outer layer, a core layer made of a thermal plastic polymeric composition and a wood component in an amount effective as a filler, and an inner layer made of a thermal plastic material. The layers are configured so as to form a generally central hollow space. The components are light weight and inexpensive to manufacture. The components can be manufactured by using a single coextrusion process to produce a cylindrical form. The cylindrical form is passed through a reshaping die to form a composite having a desired cross sectional form, for example, a composite with a substantially square or rectangular cross section.