Pressure sensitive adhesive tear tape

Details Pressure sensitive adhesive tear tape Pressure sensitive adhesive tear tape

C - Chemistry, Metallurgy

09

J

117/26

C09J 7/02 (2006.01)

Patent

CA 2314456

A tear tape for attachment to an overwrap material is formed by longitudinally drawing a bi-axially oriented film of a polymeric material, preferably polyester so as to effect further orientation in the longitudinal direction. After drawing a layer of a pressure sensitive adhesive is applied on one surface and a release coat is applied to the other surface so as to provide a release action when contacting the pressure sensitive adhesive. The film is longitudinally slit with the adhesive layer thereon into a plurality of side by side tapes which are wound into individual supply packages for supply to an end use machine. The additional drawing can be carried out at a draw ratio and at a temperature such that the heat shrink characteristics of the tape are matched to the overwrap material for heat shrinking of the overwrap onto the underlying product without puckering. The extra longitudinal strength imparted by the drawing allows the formation of a thinner tape while matching the absolute strength value required to carry out the tearing action.

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