Nylon based filaments, yarns, and fabrics

1. A multifilament comprising:

a filament that comprises a composite material comprising (i) a main structural component consisting of a mixture of one or more aliphatic nylons and one or more semiaromatic nylons, and optionally (ii) an additive component mixed with the main structural component,

wherein the filament has a draw ratio which is at least 20% greater than that of an otherwise equivalent filament having a main structural component consisting of the one or more aliphatic nylons, and

wherein the one or more semiaromatic nylons are present in the composite material in an amount of from about 2 percent, by weight, to about 10 percent, by weight.

2. The multifilament of claim 1 , wherein:

the one or more aliphatic nylons are selected from nylon 6,6, nylon 6, nylon 6,69, nylon 6,66, nylon 66,6, nylon 6,12, nylon 6,10, nylon 11, nylon 12, and mixtures thereof, and

the one or more semiaromatic nylons are selected from MXD6, 6I/6T, 6T/6I, DT/DI, DI/DT, 6I/6T/DI/DT, 6I/DI, 6T/DT, Dicycan-I, Dimetyldicycan-I, Dimethyldicycan-T, and Dicycan-T.

3. The multifilament of claim 1 , wherein the one or more semiaromatic nylons are present in the composite material in an amount of from about 2 percent, by weight, to about 6 percent, by weight.

4. The multifilament of claim 1 , wherein the additive component is present in the composite material in an amount of from about 0.1 percent, by weight, to about 3 percent, by weight.

5. The multifilament of claim 1 , wherein the filament has a greater tenacity than a filament consisting of the one or more aliphatic nylons.

6. A multifilament comprising:

a filament that comprises a composite material comprising (i) a main structural component consisting of a mixture of one or more base nylons and one or more secondary nylons, and optionally (ii) an additive component mixed with the main structure component,

wherein the one or more base nylons and the one or more secondary nylons are present in amounts such that the filament has a greater tenacity than an otherwise equivalent filament having a main structural component consisting of the one or more base nylons,

wherein the one or more base nylons consist of one or more aliphatic nylons and the one or more secondary nylons consist of one or more semiaromatic nylons,

wherein the filament has a draw ratio which is at least 20% greater than that of an otherwise equivalent filament having a main structural component consisting of the one or more aliphatic nylons, and

wherein the one or more secondary nylons are present in the composite material in an amount of from about 2 percent, by weight, to about 10 percent, by weight.

7. The multifilament of claim 6 , wherein:

the one or more aliphatic nylons are selected from nylon 6,6, nylon 6, nylon 6,69, nylon 6,66, nylon 66,6, nylon 6,12, nylon 6,10, nylon 11, nylon 12, and mixtures thereof, and

the one or more semiaromatic nylons are selected from MXD6, 6I/6T, 6T/6I, DT/DI, DI/DT, 6I/6T/DI/DT, 6I/DI, 6T/DT, Dicycan-I, Dimetyldicycan-I, Dimethyldicycan-T, and Dicycan-T.

8. The multifilament of claim 6 , wherein the one or more secondary nylons are present in the composite material in an amount of from about 2 percent, by weight, to about 6 percent, by weight.

9. The multifilament of claim 6 , wherein the additive component is present in the composite material in an amount of from about 0.1 percent, by weight, to about 3 percent, by weight.

10. The multifilament of claim 6 , wherein the one or more secondary nylons have a glass transition temperature of at least 80° C.

11. The multifilament of claim 10 , wherein the one or more base nylons have a glass transition temperature of less than 80° C.

12. The multifilament of claim 10 , wherein the one or more base nylons have a glass transition temperate in the range of about 15° C. to about 75° C.

13. The multifilament of claim 6 , wherein the multifilament has a tenacity of from about 3 to about 11 grams per denier.

14. A fabric comprising:

a multifilament comprising a plurality of filaments formed from a composite material comprising (i) a main structural component consisting of a mixture of one or more base nylons and one or more secondary nylons, and optionally (ii) an additive component mixed with the main structural component,

wherein the one or more base nylons and the one or more secondary nylons are present in the filaments in amounts such that each filament has a greater tenacity than an otherwise equivalent filament having a main structural component consisting of the one or more base nylons,

wherein the one or more base nylons consist of one or more aliphatic nylons and the one or more secondary nylons consist of one or more semiaromatic nylons,

wherein the one or more base nylons and the one or more secondary nylons are present in the filaments in amounts such that each filament has a draw ratio which is at least 20% greater than that of an otherwise equivalent filament having a main structural component consisting of the one or more aliphatic nylons, and

wherein the one or more secondary nylons are present in the composite material in an amount of from about 2 percent, by weight, to about 10 percent, by weight.

15. The fabric of claim 14 , wherein:

the one or more aliphatic nylons are selected from nylon 6,6, nylon 6, nylon 6,69, nylon 6,66, nylon 66,6, nylon 6,12, nylon 6,10, nylon 11, nylon 12, and mixtures thereof, and

the one or more semiaromatic nylons are selected from MXD6, 6I/6T, 6T/6I, DT/DI, DI/DT, 6I/6T/DI/DT, 6I/DI, 6T/DT, Dicycan-I, Dimetyldicycan-I, Dimethyldicycan-T, and Dicycan-T.

16. The fabric of claim 14 , wherein the filaments each have a denier per fiber of from about 0.1 dpf to about 3.5 dpf.