Patent ID: 9586390
Date: 2017-03-07
CPC Classifications: B26D,B32B,B65H,Y10T

Claim:
1. A method for the production of slit tape from a master roll of a continuous sheet of prepreg material comprising: a) unwinding the master roll of prepreg material; b) feeding the continuous sheet of prepreg material with a liner overlaying and attached to at least one surface of the continuous sheet into and through a slitter, thereby simultaneously slitting the prepreg sheet and liner, and c) winding the so formed slit tape, with liner attached; wherein the liner is a polymer film which 1) has a thickness of 0.1 to about 12 mils, a lengthwise tensile strength of 500 psi to 40,000 psi, and a transverse tensile strength of 500 psi to 30,000 psi, 2) resists elongation and/or the creation of stress fractures in the film under the stress of winding, and 3) manifests a sufficient adhesive or peel strength with the prepreg material so as avoid separating from the prepreg material under the stresses of the unwinding, slitting and winding processes.