SEARCH Articles Figures Tables Index of Federal Specifications and Standards STANDARDS, STANDARD SPECIFICATIONS, AND GUIDES Standard Specification for Polyethylene Plastics Molding and Extrusion Materials Standard Specification for Polyethylene Plastics Molding and Extrusion Materials from Recycled Postconsumer (HDPE) Sources Standard Specification for Polypropylene Injection and Extrusion Materials Standards, specification Test Methods, Specifications, and Standards