1169 results about "Plastic foam" patented technology

The invention provides a hollow floor system made of a steel bar and foam combined filled member. The hollow floor system comprises an upper flange, a rib beam, a lower flange and the steel bar and foam combined filled member, wherein the steel bar and foam combined filled member consists of a plastic foam body and a steel bar body; the steel bar body comprises an isolation steel bar and support steel bars; the isolation steel bar and the support steel bars of the steel bar body are integrally manufactured or welded into a whole; the isolation steel bar is arranged on the upper surface of the plastic foam body; the support steel bars pass through the plastic foam body; the length of the support steel bars is greater than the height of the plastic foam body; and support points of the support steel bars are positioned on a template of the hollow floor system. A top plate steel bar and a bottom plate steel bar of the hollow floor system can be prevented from contacting or sinking into the plastic foam body, and the problem of insufficient bond stress of the steel bars and cast-in-situ concrete in the prior art is effectively solved; and cost can be saved, and the floor system is more conveniently and quickly constructed and has a more reasonable structure.

The invention relates to surface-modified nanoparticles composed of metal or semimetal oxides or hydroxides and having been reacted on their surface with a modifier, with formation of covalent bonds. The modifier is a polysiloxane. The invention also relates to a process for preparing the nanoparticles, to their use as fillers in coating materials, plastics, foams and nail varnishes, and to dispersions which comprise the nanoparticles.

This invention relates to a method for preparing polylactic acid foamed plastic, especially polylactic acid foamed plastic sheet material for sucking-plasticization. The raw materials for the sheet material are: polylactic acid resin 100 parts, chain extender 0.2-2 parts, nucleating agent 0.1-5 parts, foamer 0.3-2.5 parts, toughener 0.5-15 parts, reinforcer 0.5-5 parts, and antioxidant 0.1-1 part. The method comprises: extruding the raw materials without the foamer to obtain master batch, adding the foamer, extruding, stretching unidirectionally, and shaping, cutting, spreading, coiling and packaging. The foamed plastic sheet material has good mechanical properties and obstructive ability, and is biodegradable, thus the cost performance is high. The sucking-plasticized products can be used to manufacture bottles for cosmetics, pesticides and drinks, food packaging containers, dishwares, trays and vacuum-shaped products.