Abstract:
A HIGH TEAR STRENGTH SPONGE RUBBER CARPET UNDERPAD COMPOSITE COMPRISED OF A LAYER OF SPONGE OR BLOWN ELASTOMER WHICH PREFERABLY HAS A PLURALITY OF FORMED BULGES OR PATTERNED CONTOURS AND A SPUNBONDED NON-WOVEN FABRIC EMBEDDED IN THE ELASTOMER TO A DEPTH LESS THAN THE FABRIC THICKNESS, THE FABRIC CONSISTING OF CONTINUOUS NYLON FILAMENTS WHICH ARE FREE OF SIZING COATINGS, LUBRICANTS, ETC., AND WHICH HAVE ETCHED SURFACES, THE FILAMENTS BEING AUTOGENOUSLY BONDED TOGETHER AT A SUBSTANTIAL NUMBER OF TOUCHING CROSS-POINTS.
Abstract:
FLEXIBLE FIBER-REINFORCED FOAM PRODUCTS, COMPRISED OF UNITARY CELLULAR STRUCTURE FOAM BODIES, THE FOAM BODIES HAVING A FIBER CONTENT COMPRISING A MULTIPLICITY OF STAPLE FIBERS RANDOMLY ORIENTED IN A MULTI-DIRECTIONAL PATTERN AND DISTRIBUTED WITH UNIFORM RANDOMNESS THROUGHOUT THE BODY, THE FIBER CONTENT PER UNIT AREA BEING AT LEAST THE AMOUNT DETERMINED WITH RESPECT TO THE DENIER BY THE EQUATION:
WHERE Y=FIBER DENIER AND X=WEB WEIGHT IN OUNCES PER SQUARE YARD, ARE PRODUCED BY FORMING A NONWOVEN WEB CONSISTING OF RANDOMLY ORIENTED FIBERS OF CONTROLLED INTERFIBER COHESION AND POROSITY, DISPENSING A FOAMABLE MIXTURE ONTO THE WEB, AND THEN COMPRESSING THE FOAM-COVERED WEB.