Process for the production of materials characterized by a continuous web matrix or force point bonding
Patent 5019311 Issued on May 28, 1991. Estimated Expiration Date: 
December 22, 2009. 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.
December 22, 2009. 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 3375933 3538020 3796778 3864124 3919369 Filter of polytetrafluoroethylene fibers Adsorbent body and method for making same Article of fibrillated polytetrafluoroethylene containing high volumes of particulate material and methods of making and using same Micro-bits of expanded flexible polyurethanes Process to produce inorganic hollow fibers InventorAssigneeApplicationNo. 455997 filed on 12/22/1989US Classes:264/122, Utilizing diverse solid particles55/524, With coating, impregnant, or bonding agent55/527, Fibrous or strand form156/283, Adhesive applied as dry particles156/296, Strands, rods, tubes or sticklike bodies to each other only210/502.1, Sorptive component containing210/503, Diverse granular or fibrous210/505, Including fibers210/506, Coated or impregnated, e.g., adhesively bound210/508, Fibrous264/115With liberating or forming of particlesExaminersPrimary: Weston, CalebAssistant: Aftergut, Jeff H. Attorney, Agent or FirmForeign Patent References
International ClassesB01D 027/04B32B 031/00 AbstractA method of forming a composite material by providing a quantity of first particles of a binder material and a quantity of second particles of a primary material having softening temperature substantially in excess of the softening temperature of the binder material. The first and second quantities of particles are combined into a substantially uniform mixture. The uniform mixture is heated in the absence of pressure or shear sufficient to convert the binder particles, to a temperature substantially above the softening point of the binder material but less than the softening temperature of the primary material. Thereafter, pressure and shear are applied to the heated mixture sufficient substantially immediately to convert at least a portion of the binder material particles into a substantially continuous webbing structure or force the formation of point-bonds. Substantially immediately after formation of the binder particles into this unique structure, the mixture is rapidly cooled to below the softening point of the binder material to retain the converted binder material in its continuous form or forced point-bonded condition. This produces the composite material composed of primary particles, a binder resin phase forming a continuous web matrix or point bonds, and a volume of empty pores. Also disclosed are products formed by the method.Field of SearchAdhesive applied as dry particlesStrands, rods, tubes or sticklike bodies to each other only Joining tube ends to form torus Utilizing diverse solid particles With liberating or forming of particles Sorptive component containing Bound, fused or matted, e.g., porous shapes, sponges, etc. Diverse granular or fibrous Including fibers Coated or impregnated, e.g., adhesively bound Fibrous Porous unitary mass With coating, impregnant, or bonding agent Fibrous or strand form SPECIFIC MEDIA MATERIAL | |
