Directly printable pressure-sensitive adhesive tape
AssigneeMinnesota Mining and Manufacturing Company
InventorMaan-shii S. Wu
Life of this patent
Estimating the term…
Abstract
A directly printable backsize coating composition for a pressure-sensitive adhesive tape comprising a layer of a low adhesion backsize compound, an ink anchoring resin, and a primer resin wherein the surface free energy of the ink anchoring resin and the primer are within about 10 percent of the surface free energy of the low adhesion backsize compound.
Claims8
A pressure-sensitive tape comprising a non-fibrous backing, a layer of normally tacky and pressure-sensitive adhesive coated over and firmly adherently bonded to the face side of said backing, and a low adhesion backsize composition coated over and firmly adherently bonded to the backside of said backing, said low adhesion backsize composition being a mixture of
- at least one low adhesion backsize compound, wherein said low adhesive backsize compound comprises at least about 10 percent by weight of said composition and is selected from the group consisting of (A) a higher-alkyl acrylate or higher-alkyl methacrylate ester copolymerized with at least one ethylenically unsaturated monomer, and (B) a terpolymer of (1) an ethylenically unsaturated monomer containing a fluoroalkyl group of at least 6 carbon atoms, (2) an ethylenically unsaturated monomer containing a free carboxylic acid group, and (3) an ethylenically unsaturated monomer containing a functional group which forms a conjugated system with its ethylenically unsaturated bond and is hydrolyzable to a free carboxylic group,
- an ink anchoring resin, comprising a cellulose ester having at least about 0.5 percent by weight of hydroxyl groups and comprising from about 5 to about 50 percent by weight of said composition, and
- a primer selected from the group consisting of chlorinated polyolefin and copolyester resin, wherein said ink anchoring resin and said primer have free surface energies within about 10 percent of the free surface energy of said low adhesion backsize compound.
A composition capable of providing a backsize coating on the backing of a pressure-sensitive adhesive tape comprising a mixture of
- at least one low adhesion backsize compound, wherein said low adhesion backsize compound comprises at least about 10 percent by weight of said composition and is selected from the group consisting of (A) a higher-alkyl acrylate or higher-alkyl methacrylate ester copolymerized with at least one ethylenically unsaturated monomer, and (B) a terpolymer of (1) an ethylenically unsaturated monomer containing a fluoroalkyl group of at least 6 carbon atoms, (2) an ethylenically unsaturated monomer containing a free carboxylic acid group, and (3) an ethylenically unsaturated monomer containing a functional group which forms a conjugated system with its ethylenically unsaturated bond and is hydrolyzable to a free carboxylic group,
- an ink anchoring resin, comprising a cellulose ester having at least about 0.5 percent by weight of hydroxyl groups and comprising from about 5 to about 50 percent by weight of said composition, and
- a primer selected from the group consisting of chlorinated polyolefin and copolyester resin, said mixture being capable of providing a directly printable surface on said backing, wherein the surface free energy of said ink anchoring resin and said primer are within about 10 percent of the surface free energy of said low adhesion backsize compound.
Dependencies are inferred from the claim text.