Gypsum wallboard and process for making same
Hardenable sheet materials
Oil sorbing mat
Plastic reinforcement of concrete Patent #: 4168924
ApplicationNo. 05/971065 filed on 12/19/1978
US Classes:442/386, Including a layer derived from a water-settable material (e.g., cement, gypsum, etc.)156/276, With mass application of nonadhesive fibers or particles between laminae156/42, With embedding of reinforcing material during or subsequent to core formation264/136, Impregnation of batt, sheet, or filament264/146, Slitting longitudinally264/257, One component is a fibrous or textile sheet, web, or batt264/258, Joining a plurality of superposed fibrous or textile layers264/333, Inorganic hydraulic settable material shaping428/910PRODUCT WITH MOLECULAR ORIENTATION
ExaminersPrimary: Dixon, William R. Jr.
Attorney, Agent or Firm
International ClassesC04B 16/00 (20060101)
C04B 16/06 (20060101)
B28B 23/00 (20060101)
Foreign Application Priority Data1977-12-30 NL
AbstractAn improved process for the manufacture of shaped articles from water-hardening materials reinforced with multiple layers of a fibrillated organic film. A plurality of networks are formed from fibrillated organic films and are simultaneously advanced into contact with a water-hardening material to form a composite layer of the networks impregnated with the water-hardening material. This layer is thereafter formed into the desired configuration for the shaped article, and allowed to set. The average number of meshes within the networks with a minimum of two per square centimeter and the number of networks within the layer are such that the average number of meshes per cubic centimeter of the final shaped article is at least 100.