A nonwoven fabric and a method of making thereof. The nonwoven fabric includes a plurality of randomly-oriented fibers, the plurality of randomly-oriented fibers including: at least 60 wt % of oxidized polyacrylonitrile fibers; and from to less than 40 wt % of reinforcing fibers having an outer surface comprised of a (co)polymer with a melting temperature of from 100° C. to 450° C.; and a fluoropolymer binder on the plurality of randomly-oriented fibers; wherein the plurality of randomly-oriented fibers is bonded together to form the nonwoven fabric, optionally wherein the nonwoven fabric has a thickness of one millimeter or less.

A flame-retardant fiber composite includes an acrylic fiber A containing an acrylic copolymer and an aramid fiber. The acrylic fiber A is substantially free of an antimony compound, and the flame-retardant fiber composite forms a surface-foamed char layer when burned. A flame-retardant work clothing includes the flame-retardant acrylic fiber. A highly flame-retardant fiber composite and highly flame-retardant work clothing include an acrylic fiber, and are capable of exhibiting high flame retardancy while suppressing environmental impacts caused by a flame retardant.

A sound-absorbing material nonwoven fabric includes: 30 to 80 mass % of short fibers A having a fineness of 0.4 to 0.9 dtex; and 20 to 70 mass % of short fibers B having a fineness of 1.1 to 20.0 dtex. A carding passage coefficient of the short fibers A calculated from equation (1) is in a range of 15 to 260. The equation (1) is carding passage coefficient=(fineness×strength×√elongation percentage×√number of crimps×√crimping degree)/(fiber length).

A sound-absorbing material nonwoven fabric includes: 30 to 80 mass % of short fibers A having a fineness of 0.4 to 0.9 dtex; and 20 to 70 mass % of short fibers B having a fineness of 1.1 to 20.0 dtex. A carding passage coefficient of the short fibers A calculated from equation (1) is in a range of 15 to 260. The equation (1) is carding passage coefficient=(fineness×strength×√elongation percentage×√number of crimps×√crimping degree)/(fiber length).

The present invention provides an anisotropic, thermal conductive, electromagnetic interference (EMI) shielding composite including a plurality of aligned polymer nanofibers to form a polymer mat or scaffold having a first and second planes of orientation of the polymer nanofibers. The first plane of orientation of the polymer nanofibers has a thermal conductivity substantially the same as or similar to that of the second plane, and the thermal conductivity of the first or second plane of orientation of the polymer nanofibers is at least 2-fold of that of a third plane of orientation of the polymer nanofibers which is about 90 degrees out of the first and second planes of orientation of the polymer nanofibers, respectively, while the electrical resistance of each of the first and second planes is at least 3 orders lower than that of the third plane. A method for preparing the present composite is also provided.

The present invention provides compositions comprising aligned fibers of electrospun PNIPAAm and poly (ϵ-caprolactone) (PCL) (denoted PNIPAAm/PCL fibers). The PNIPAAm/PCL compositions enable enhanced growth and detachment of intact anisotropic cell sheets. The compositions do not require chemical modification or resource-intensive techniques, thus saving time and expense, and have the potential to generate tissue-specific, aligned cell sheets for transplant studies.

The present invention provides compositions comprising aligned fibers of electrospun PNIPAAm and poly (ϵ-caprolactone) (PCL) (denoted PNIPAAm/PCL fibers). The PNIPAAm/PCL compositions enable enhanced growth and detachment of intact anisotropic cell sheets. The compositions do not require chemical modification or resource-intensive techniques, thus saving time and expense, and have the potential to generate tissue-specific, aligned cell sheets for transplant studies.

This application provides a Cu-containing non-woven fabric with antibacterial and antiviral properties and application thereof. The preparation method includes the following steps: web-forming, pre-wetting, and spunlace bonding a fiber in sequence to obtain the spunlace non-woven base fabric; padding and sizing the spunlace non-woven base fabric in an organic copper complex solution to obtain a Cu-containing spunlace non-woven fabric, wherein the Cu-containing spunlace non-woven fabric contains copper of ≥500 ppm; and drying and winding the Cu-containing spunlace non-woven fabric after being padded and sized. The method is simple and easy to achieve industrialization. This application also provides a Cu-containing non-woven fabric with antibacterial and antiviral properties having excellent antibacterial and antivirus properties. This application also provides an application of the Cu-containing non-woven fabric with antibacterial and antiviral properties which has an advantage of being widely used.

Fibrous elements, such as filaments and/or fibers, and more particularly to fibrous elements that contain a non-hydroxyl polymer, fibrous structures made therefrom, and methods for making same are provided.

Fibrous elements, such as filaments and/or fibers, and more particularly to fibrous elements that contain a non-hydroxyl polymer, fibrous structures made therefrom, and methods for making same are provided.