The hook type fastener generally has an integral film backing {HEAD ~ which film backing} has {TAIL ~ a porosity} of from 0.0001 to 0.005 cm3, a backing thickness of from 25 to 200 μm, a stiffness of from 10 to 2000 Gurley units and a hook or projection containing surface area of at least 10 cm2 
The hook type fastener generally has an integral film backing { HEAD ~ which film backing } has { TAIL ~ a porosity } of from 0.0001 to 0.005 cm3 , a backing thickness of from 25 to 200 μm , a stiffness of from 10 to 2000 Gurley units and a hook or projection containing surface area of at least 10 cm2
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH