Papers containing fibrids derived from diamino diphenyl sulfone

1. A printable thermally stable uncoated paper, comprising:

a) non-granular, fibrous or film-like polymer fibrids in the form of very finely-divided filmy or irregular fibrous shape particles comprising a polymer or copolymer derived from an amine monomer selected from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof, the fibrids having an average maximum dimension of 0.1 to 1 mm, a ratio of maximum to minimum dimension of 5:1 to 10:1, and a thickness of no more than 2 microns;

b) at least one high performance floc selected from the group of para-aramid, meta-aramid, carbon, glass, liquid crystalline polyester, polyphenylene sulfide, polyether-ketone-ketone, polyether-ether-ketone, polyoxadiazole, polybenzazole, and mixtures thereof, the floc having a length of from 2.0 to 25 mm; and

c) at least one floc selected from the group of polyester, aliphatic polyamide, viscose and mixtures thereof

wherein the weight ratio of fibrids to floc in the paper composition is from 95:5 to 10:90; and

wherein the polymer fibrids are present in the paper in an amount of at least 20 weight percent and provide sites for accepting a printing ink on a surface of the paper.

2. The paper of claim 1 , further comprising:

d) at least one floc containing a polymer or copolymer derived from a monomer selected from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof.

3. The paper of claim 1 wherein the meta-aramid fiber is poly (metaphenylene isophthalamide) fiber.

4. The paper of claim 1 , further comprising a second non-granular, fibrous or film-like polymer binder.

5. The paper of claim 4 wherein the polymer binder is selected from the group of meta-aramid fibrids, para-aramid fibrids, and mixtures thereof.

6. The paper of claim 5 wherein the meta-aramid is poly (metaphenylene isophthalamide).

7. The paper of claim 1 wherein the polyester is polyethylene terephthalate or polyethylene naphthalate.

8. The paper of claim 1 wherein the aliphatic polyamide is selected from the group of nylon 6, nylon 66, nylon 610, nylon 11 and mixtures thereof.

9. A heat resistant tag or label, or security paper comprising the paper of claim 1 .

10. A wire or conductor wrapped with the paper of claim 1 .

11. A laminate structure comprising the paper of claim 1 .

12. A honeycomb structure comprising the paper of claim 1 .

13. A motor, transformer, or power equipment having an electrical insulating wrapping for wires and/or conductors, the electrical insulating wrapping comprising a printable thermally stable uncoated paper comprising:

a) non-granular, fibrous or film-like polymer fibrids in the form of very finely-divided filmy or irregular fibrous shape particles comprising a polymer or copolymer derived from an amine monomer selected from the group consisting of 4,4′diaminodiphenyl sulfone, 3,3′diaminodiphenyl sulfone, and mixtures thereof, the fibrids having an average maximum dimension of 0.1 to 1 mm, a ratio of maximum to minimum dimension of 5:1 to 10:1, and a thickness of no more than 2 microns:

b) at least one high performance floc selected from the group of para-aramid, meta-aramid, carbon, glass, liquid crystalline polyester, polyphenylene sulfide, polyether-ketone-ketone, polyether-ether-ketone, polyoxadiazole, polybenzazole, and mixtures thereof, the floc having a length of from 2.0 to 25 mm; and

c) at least one floc selected from the group of polyester, aliphatic polyamide, viscose and mixtures thereof;

wherein the weight ratio of fibrids to floc in the paper composition is from 95:5 to 10:90; and

wherein the polymer fibrids are present in the paper in an amount of at least 20 weight percent and provide sites for accepting a printing ink on a surface of the paper.