Patent ID: 9534153
Date: 2017-01-03
CPC Classifications: B29C,B29K,B29L,B32B,C09J,Y10T

Claim:
1. A carrier film for an adhesive tape comprising: an outermost layer containing about 50% to 100% of a polypropylene therein; an adhesive-receiving layer containing about 50% to 100% of a polypropylene therein; and a core layer consisting essentially of a polyethylene selected from the group consisting of linear medium density polyethylene, medium density polyethylene, metallocene resins thereof, and combinations thereof, the core layer being positioned between the outermost layer and the adhesive-receiving layer; wherein the outermost layer, the core, and the adhesive-receiving layer are coextruded and; are biaxially oriented; wherein the outermost layer and the adhesive-receiving layer are the same or different, and the polyethylene is about 40% to about 80% weight based on the total weight of the carrier film; wherein the carrier film has an elongation in the machine direction that is from greater than 100% to about 126% and a tensile modulus in the machine direction of about 14.7 psi (0.101 MPa) to about 15.5 psi (0.107 MPa).