| abstract |
TURF-LIKE SURFACING FORMED FROM SOFT ELASTOMERIC BASE LAYER ADHERED TO RIGID SUBSTRATE FORMED FROM 100% SOLIDS POLYURETHANE HAVING SHORE A2 HARDNESS OF BETWEEN 5 AND 404 AND CONTAINING 15 TO 75% BY VOLUME OF VOIDS, THE MAJOR PORTION OF WHICH ARE IN THE 1/16 TO 1/4 DIAMETER RANGE AND TOP SURFACE OF TOUGH PILE FABRIC ADHERED BY MEANS OF ADHESIVE WHICH PENETRATES THE BACK OF SAID FABRIC AND EMBEDS THE LOWER PORTION OF THE FIBERS THEREIN, THE BASE LAYER PROVIDING BOTH VISCOUS AND ELASTIC RESPONSE TO COMPRESSION AND BEING CAPABLE OF SLOW RECOVERY FROM INDENTATION OVER A 2- TO 20-SECOND PERIOD. |