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AssigneeRoyal Group Technologies Limited
InventorsChengjie Zhang, Bruno Casciato
Estimating the term…
Fiber reinforced composite plastic materials for use in injection and compression molding and extrusion processing produced from waste materials, the composite material includes an effective amount of high melting point polymer fiber material and a sufficient amount of low melting point plastic material to coat and bind the high melting point fiber material together and method of producing same.
A fiber reinforced composite plastic material for use in injection and compression molding and extrusion processing produced from waste materials, said composite material comprising pellets incorporating an effective amount of high melting point waste polymer fiber material comprising polyethylene terephthalate and/or nylon coated and bound together by fused waste plastic material having a melting point substantially below the melting point of said fiber material, said pellets further incorporating particles of an inorganic filler of a size to pass through injection molding and extrusion equipment without damaging same coated and bound together by said waste plastic material, said inorganic filler particles comprising particles of waste construction material selected from one or more of the group consisting of glass, brick;
A fiber reinforced composite plastic material for use in injection and compression molding and extrusion processing produced from waste materials, said composite material comprising pellets incorporating an effective amount of high melting point waste polymer fiber material coated and bound together by fused waste plastic material having a melting point substantially below the melting point of said fiber material, said high melting point fiber material in said pellets comprising a network of lengths of fiber having a melting point substantially above 200° C. bound together by said fused fiber coating plastic material with said fused fiber coating plastic material having a melting point in the range of about 125° C. to 200° C., said composite material pellets further include coated and bound sawdust particles with said high melting point fiber material comprising about 45% by weight of said composite material in said pellets, said sawdust particles comprising about 10% by weight of said composite material in said pellets and said fiber coating plastic material comprising about 45% by weight of said composite material in said pellets.
A method of producing from waste material a fiber reinforced composite material for use in injection and compression molding and extrusion processes, said method comprising receiving separately streams of waste material from construction sites, from households, from retail stores disposing of unsaleable plastic products and from industrial sites, downsizing the waste material in each stream into small particles and storing suck particles from each stream separately in silos ready for blending, said silos providing sources of the following types of materials comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Of polymers: without chemical reactions
Recovery of plastics or other constituents of waste material containing plastics: by agglomeration or compacting
Floor coverings: carpets
Reuse, recycling or recovery technologies: plastics recycling; Rubber recycling
Term ended 28 Jan 2024 (estimated)
This invention relates to useful composite plastic materials produced from consumer, construction, commercial and industrial waste and, more particularly, to composite plastic materials adapted for injection and compression molding and extrusion processes produced from such waste material and their method of production.
There is today a widespread effort to use recycled and waste materials to produce useful products with the object of both producing products at lower cost while making an environmental contribution by using waste materials which would otherwise be discarded into dumps or landfill waste areas.
Such efforts to process waste materials have had limited success, utilizing minimal amounts of selected waste material and have not led to large scale production of a wide range of low cost acceptable composite products.
The waste materials from the various sources as outlined above are handled in the order in which they are received.
In the case of construction waste, the waste consists mainly of brick, slabs of concrete, wood members and structures, dry wall, minor amounts of plastics and other contaminants, as well as various metal items, ferrous and non-ferrous. This material is put through a line of down sizing equipment including one or more shredders, grinders, hammer mills and pulverizes. The non-melting materials, such as glass, concrete, brick, drywall, etc.are broken up with particles of a size, eg. 1/16th inch or less, which will easily pass through all processing equipment such as extrusion equipment and injection molding equipment and can be uniformly distributed in melting plastics. During the downsizing, the various metal materials are discarded or removed along the way as they are difficult to reduce to the desired particle size without exceptionally powerful pulverizers.
In the case of blue box curb side waste which is made up of all plastics used in households on a daily basis along with some ferrous and non-metal ferrous contamination as well as paper and a small percentage of organic waste, the material is downsized to the order of particles of 3/16th of an inch or less, the metal again being removed along the way.