Compositions and articles comprising a non-woven matrix for use as anti-microbial filters are provided. In some embodiments, the non-woven matrix comprises nanofibers suitable for capturing a droplet comprising a microbe (e.g. a virus particle). In some embodiments, the non-woven matrix comprises a biocide suitable for reducing propagation and/or inactivating a microbe.

Compositions and articles comprising a non-woven matrix for use as anti-microbial filters are provided. In some embodiments, the non-woven matrix comprises nanofibers suitable for capturing a droplet comprising a microbe (e.g. a virus particle). In some embodiments, the non-woven matrix comprises a biocide suitable for reducing propagation and/or inactivating a microbe.

A nonwoven article includes a plurality of electrospun polycrystalline, aluminosilicate ceramic filaments that form a cohesive nonwoven mat. Each of the aluminosilicate ceramic filaments in the mat have an average diameter of about 200 nm to about 1000 nm as determined with electron microscopy, and the aluminosilicate ceramic filaments have an average crystalline mullite content of about 15 wt % to about 80 wt %.

A nonwoven article includes a plurality of electrospun polycrystalline, aluminosilicate ceramic filaments that form a cohesive nonwoven mat. Each of the aluminosilicate ceramic filaments in the mat have an average diameter of about 200 nm to about 1000 nm as determined with electron microscopy, and the aluminosilicate ceramic filaments have an average crystalline mullite content of about 15 wt % to about 80 wt %.

A colored nonwoven fabric that contains a colorant and nanofibers, in which the colored nonwoven fabric has an uneven shape on at least part of a surface thereof, and an L*.sub.1 value of convex portions of the uneven shape is higher than an L*.sub.2 value of concave portions of the uneven shape; a colored nonwoven fabric set; and a process for producing the colored nonwoven fabric.

A colored nonwoven fabric that contains a colorant and nanofibers, in which the colored nonwoven fabric has an uneven shape on at least part of a surface thereof, and an L*.sub.1 value of convex portions of the uneven shape is higher than an L*.sub.2 value of concave portions of the uneven shape; a colored nonwoven fabric set; and a process for producing the colored nonwoven fabric.

The present invention relates to a process for producing a colored nonwoven fabric that contains a colorant and nanofibers, which includes the step of injecting a polymer compound A by an electrospinning method to deposit the nanofibers on a surface of a collector, in which the surface of the collector on which the nanofibers are deposited is at least partially formed into an uneven shape.

The present invention relates to a process for producing a colored nonwoven fabric that contains a colorant and nanofibers, which includes the step of injecting a polymer compound A by an electrospinning method to deposit the nanofibers on a surface of a collector, in which the surface of the collector on which the nanofibers are deposited is at least partially formed into an uneven shape.

The present invention relates to [1] a concavo-convex plate for an electrospinning method, in which a surface resistivity of the concavo-convex plate is not more than 1×10.sup.−2Ω/□, and the concavo-convex plate has an uneven structure on at least a part of a surface thereof, and [2] a process for producing a nonwoven fabric containing nanofibers by an electrospinning method using the concavo-convex plate for an electrospinning method according to the aforementioned [1] as a collector, which includes the step of depositing the nanofibers on a surface of the concavo-convex plate on which the uneven structure is formed.

A material includes nonwoven fibers and a surface modification that crosslinks the nonwoven fibers together. The surface modification can include chemical reactive groups. The reactive groups can be selected from diisocyanates, alcohols, epoxides, imides, amides, imines, amines, diacrylates, disiloxanes and disilazanes. A method of forming the material electrospins fiber material in the form of fibers into a nonwoven material. A surface modification is introduced to the fibers either by modifying the fiber material before the electrospinning or by modifying the fiber surface after the electrospinning. The fibers are crosslinked to form the crosslinked nonwoven material.