An anti-counterfeiting yarn includes a uniformly distributed up-conversion fluorescent material and a polymer, wherein the up-conversion fluorescent material comprises a maximum weight percent of about 1.8%. A method of preparing an anti-counterfeiting yarn includes mixing functional polymer chips containing up-conversion fluorescent material with polymer chips not containing up-conversion fluorescent material in a ratio such that the fluorescent material is uniformly distributed in the mixture, melting the mixture, extruding the melt into filaments, and producing anti-counterfeiting yarn through spinning and drawing the filaments.

An anti-counterfeiting yarn includes a uniformly distributed up-conversion fluorescent material and a polymer, wherein the up-conversion fluorescent material comprises a maximum weight percent of about 1.8%. A method of preparing an anti-counterfeiting yarn includes mixing functional polymer chips containing up-conversion fluorescent material with polymer chips not containing up-conversion fluorescent material in a ratio such that the fluorescent material is uniformly distributed in the mixture, melting the mixture, extruding the melt into filaments, and producing anti-counterfeiting yarn through spinning and drawing the filaments.

Disclosed are a polyester hollow fiber with excellent sound absorption and a method of manufacturing the same. The polyester hollow fiber may have a hollow ratio of about 27% to 35% compared to the cross-sectional area, and the value of the following equation (1) may be about 1.5 or greater, and the hollow in the cross-section preferably may be a three-lobed type and preferably may correspond to the following equation (1).

[00001]$\begin{array}{cc}\frac{P}{\sqrt{4\Pi A}}& \left(1\right)\end{array}$

In the above equation (1), A is the cross-sectional area (μm.sup.2) of the fiber, and P is the length (μm) around the cross-section of the fiber.

Disclosed are a polyester hollow fiber with excellent sound absorption and a method of manufacturing the same. The polyester hollow fiber may have a hollow ratio of about 27% to 35% compared to the cross-sectional area, and the value of the following equation (1) may be about 1.5 or greater, and the hollow in the cross-section preferably may be a three-lobed type and preferably may correspond to the following equation (1).

[00001]$\begin{array}{cc}\frac{P}{\sqrt{4\Pi A}}& \left(1\right)\end{array}$

In the above equation (1), A is the cross-sectional area (μm.sup.2) of the fiber, and P is the length (μm) around the cross-section of the fiber.

A fabrication method for a water-absorbent filter includes obtaining a homogenized tragacanth suspension by dissolving tragacanth in a solvent, where the solvent may include distilled water, ethyl acetate, acetic acid, and formic acid, obtaining a support layer by coating a stainless steel mesh with a thin layer of a hydrophobic polymer, coating a stainless steel mesh with the thin layer of the hydrophobic polymer comprising electrospinning a hydrophobic polymer solution onto the stainless steel mesh, forming a tragacanth nanofibrous web on the support layer by electrospinning the homogenized tragacanth suspension onto the support layer, and cross-linking the tragacanth nanofibrous web by exposing the tragacanth nanofibrous web to a saturated vapor of a cross-linking agent.

A fabrication method for a water-absorbent filter includes obtaining a homogenized tragacanth suspension by dissolving tragacanth in a solvent, where the solvent may include distilled water, ethyl acetate, acetic acid, and formic acid, obtaining a support layer by coating a stainless steel mesh with a thin layer of a hydrophobic polymer, coating a stainless steel mesh with the thin layer of the hydrophobic polymer comprising electrospinning a hydrophobic polymer solution onto the stainless steel mesh, forming a tragacanth nanofibrous web on the support layer by electrospinning the homogenized tragacanth suspension onto the support layer, and cross-linking the tragacanth nanofibrous web by exposing the tragacanth nanofibrous web to a saturated vapor of a cross-linking agent.

The invention relates to a regenerated cellulose fiber in the form of a solid viscose flat fiber having the following properties: The fiber consists of cellulose by more than 98%. The ratio of width B to thickness D of the fiber is 10:1 or higher. The fiber surface is essentially smooth. The fiber is essentially transparent.
The fiber according to the invention is particularly suitable for the production of paper.

The invention relates to a regenerated cellulose fiber in the form of a solid viscose flat fiber having the following properties: The fiber consists of cellulose by more than 98%. The ratio of width B to thickness D of the fiber is 10:1 or higher. The fiber surface is essentially smooth. The fiber is essentially transparent.
The fiber according to the invention is particularly suitable for the production of paper.

The invention concerns a composite material comprising a carbon-based material and a non-continuous film comprising a plurality of regions of a metal-based wetting material associated with the carbon-based material, the non-continuous film of the wetting material being configured to tune the carbon-based material to adhesively receive thereon a film of at least one polymeric material.

The present invention provides a lyocell fiber with increased water retention value and decreased crystallinity as well as a method for producing same and products comprising same.