Printable magnetic receptive composite sheet and method of making
Printable magnetic receptive composite sheets are made by calendering a thin layer of a magnetic composition and bonding it to a top printable layer on one or both sides of the magnetic layer wherein the calendered layer has a thickness up to 10 mils.
1. A flexible printable magnetic receptive composite sheet comprising:
a calendered magnetic receptive sheet containing a thermoplastic binder and a ferrous powder having a front side and a back side, wherein the amount of ferrous powder is about 50% to 60% by weight and the amount of the thermoplastic binder is about 60% to 40% by weight, and
a printable substrate laminated to at least one of said sides, wherein said calendered magnetic receptive sheet has a thickness up to 10 mils;
said printable substrate having a universal coating for solvent, eco-solvent, latex, UV or epoxy ink printing with the magnetic receptive composite sheet.
2. The flexible composite sheet of claim 1 wherein said calendered magnetic receptive sheet has a thickness from about 6 to 10 mils.
3. The flexible composite sheet of claim 1 wherein said printable substrate is selected from the group of a polymeric material, cotton, textile or a paper product.
4. The flexible composite sheet of claim 3 having an indefinite length and a width of up to about 60 inches with a total thickness of up to about 20 mils.
5. The flexible composite sheet of claim 3 wherein the polymeric material is a thermoplastic polymer.
6. The flexible composite sheet of claim 5 wherein said polymer is a polyester or PVC.
7. The flexible composite sheet of claim 6 wherein the polyester is polyethylene terephthalate.
8. The flexible composite sheet of claim 1 wherein said printable coating has a silicon dioxide or a titanium oxide pigment dispersed in a polymeric binder selected from the group of a water-based polyurethane, water-based ethylene vinyl acetate polymer and polyacrylic emulsion.
9. The flexible composite sheet of claim 1 wherein the said thermoplastic binder is a polymer with a monomeric group of an olefin, vinyl halide and vinyl acetate, and copolymers thereof.
10. The flexible composite sheet of claim 1 wherein the thermoplastic binder is a chlorinated polyethylene, ethylene vinyl acetate, or polyolefin elastomer, and mixtures thereof.
11. The flexible composite sheet of claim 1 wherein the flexible calendered magnetic receptive sheet is laminated to the printable substrate with the aid of an adhesive.
12. The flexible composite sheet of claim 1 wherein said calendered magnetic receptive sheet contains an anaerobic prodegradant.
13. The flexible composite sheet of claim 12 wherein said anaerobic prodegradant is a monomeric adduct of an organotitanate or organozirconate.