Theory of Markedness in Generative Grammar

A powder of a polyolefin, such as a normal polyethylene, having a melt index of between 2 and 20 is oxidized slightly and thereafter is sintered into a layer which will adhere strongly by thermal fusion to a polyolefin surface and also to a polar surface such as that of a layer or article composed of a polyamide, polyurethane or polyester resin. Large industrial articles such as containers and building construction elements can be produced with desired strength and surface properties by use of a sintered layer of that oxidized polyolefin powder to join to a polyolefin layer a layer of a polar resin or a different polyolefin layer. By being sintered in the presence of a blowing agent, the slightly oxidized powder forms a foamed bonding layer which will securely join together layers having different thermal expansion coefficients.