Method for producing filler-loaded thermoplastic resin composite
Patent 4491553 Issued on January 1, 1985. Estimated Expiration Date: 
June 25, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 25, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2991508 3054761 3528879 3533930 3838092 3908038 Gasket and sealing structures of filled polytetrafluoroethylene resins Method of making polytetrafluoroethylene composite sheet Method for producing free flowing particles of elastomeric material Article of fibrillated polytetrafluoroethylene containing high volumes of particulate material and methods of making and using same InventorsAssigneeApplicationNo. 06/392062 filed on 06/25/1982US Classes:264/51, By gas forming or expanding264/117, Agitating to form larger particles (i.e., accretion or agglomeration)264/118, With subsequent cutting, grooving, breaking, or comminuting264/122, Utilizing diverse solid particles264/127, Fluorocarbon resin264/349, MISCELLANEOUS264/517Bulk deposition of particles by differential fluid pressureExaminersPrimary: Lowe, JamesAttorney, Agent or FirmInternational ClassesC08J 3/20 (20060101)C08L 101/00 (20060101) C08J 9/00 (20060101) C08L 27/18 (20060101) C08L 27/00 (20060101) Foreign Application Priority Data1979-07-17 JPAbstractThe invention provides an improved method for producing a filler-loaded thermoplastic resin composite by mixing a thermoplastic resin with a filler, making it possible to be applied to molding machine such as extrusion and injection molding machines without the disadvantage of segregation between the resin and the filler otherwise inevitable leading to inferior uniformity of the shaped articles. The invention is characterized by the presence of a fibrillatable polytetrafluoroethylene during the mixing under mechanical shearing forces, wherein the thermoplastic resin is melted in one case and not melted in other case. The invention is also effective for shaping cellular foamed bodies of a filler-loaded thermoplastic resin with fine and uniform cellular structure. | |
