Pressure sensitive adhesives for use on low energy surfaces
Assignee3M Innovative Properties Company
InventorsRichard L. Peloquin, Albert I. Everaerts, Kenneth D. Wilson, Stephen J. Galick
Life of this patent
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Abstract
A vinyl graphic marking film or label coated with a pressure sensitive acrylic adhesive designed to achieve high or permanent adhesion to polymeric low energy surfaces is disclosed. In addition to good adhesion to low energy surfaces, the graphic marking film or label may have microperforated or micro-rough edges which initiate tearing when removal is attempted. The article maintains flexibility and film strength for easy fabrication in graphic marking film or label manufacture.
Claims10
A method of using an acrylic pressure sensitive adhesive, comprising the steps of:
- (a) adhering the acrylic pressure sensitive adhesive to a surface of a polymeric backing, and
- (b) adhering the acrylic pressure sensitive adhesive to a low energy surface thereby adhering the backing to the low energy surface, wherein the acrylic pressure sensitive adhesive comprises:
- a) about 100 parts by weight of an acrylic copolymer, said acrylic copolymer comprising from about 70-98% by weight of one or more monofunctional acrylates having nontertiary alkyl groups with between 1 and 14 carbon atoms and from about 30-2% by weight of a polar monomer;
- b) about 10-40 parts by weight of a tackifier;
- c) about 3-10 parts by weight of a plasticizer;
- and
- d) optionally, a crosslinker,
- wherein:
- (i) the acrylic pressure sensitive adhesive is applied to the backing as a water-based emulsion, and adhering the adhesive to the backing comprises removing the water from the emulsion prior to adhering the adhesive to a low energy surface;
- (ii) the acrylic pressure sensitive adhesive is applied to the backing as a solvent-based solution, and adhering the adhesive to the backing comprises removing the solvent from the solution prior to adhering the adhesive to a low energy surface;
- (iii) the acrylic pressure sensitive adhesive is applied to the backing as a UV or thermally curable syrup, and adhering the adhesive to the backing comprises curing the syrup prior to adhering the adhesive to a low energy surface;
- or
- (iv) the acrylic pressure sensitive adhesive is applied to the backing as a melt, and adhering the adhesive to the backing comprises allowing the melt to cool and solidify prior to adhering the adhesive to a low energy surface.
Dependencies are inferred from the claim text.