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US 2003/0151160 A1Published application
Pellet formulation
OwnerThomas C. Faerberinventor
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OwnerThomas C. Faerberinventor
Estimating the term…
This invention generally relates to the formulation of thermoplastic pellets from a combination of raw sludge material from a paper mill with thermoplastic material from post industrial or consumer sources. Initially, waste raw sludge material is transported via a conveyor to a dryer for removal of excess water. The waste thermoplastic material is preferably shredded into a desired size and transported to a densifier. The dried sludge is added to the densifier where the shredded thermoplastic material and dried sludge is suitably mixed with additive agents. The mixed sludge and shredded thermoplastic material is then transported to a grinder for grinding. The ground material is then transported to a hopper for introduction into an extruder. The ground combined material is then subjected to an extrusion process for the formulation of thermoplastic pellets having supplemental fibers to enhance the properties for use as starting material in an injection molding process.
A method of formulating thermoplastic pellets for use in an injection molding process comprising the following steps:
A method of formulating thermoplastic pellets for use in injection molding processes comprising:
The thermoplastic pellets of claim 26 wherein 25 percent by weight of the total weight of the thermoplastic pellets is formed of the dried sludge material.
Thermoplastic pellets suitable for use in an injection molding process, the thermoplastic pellets comprising a combination of materials, the materials comprising polystyrene foam, polypropylene, dried sludge material and saw dust.
Thermoplastic pellets suitable for use in an injection molding process comprised of predetermined percentages by weight of the following materials:
Dependencies are inferred from the claim text.