Methods and systems of the present invention use mixed textile feedstock, which may include post-consumer waste garments, scrap fabric and/or other textile materials as a raw feed material to produce isolated cellulose and other isolated molecules having desirable properties that can be used and be used in the textile and apparel industries, and in other industries. A multi-stage process is provided, in which mixed textile feed material is subjected to one or more pretreatment stages, followed by at least two pulping treatments for isolating cellulose molecules and other molecular constituents, such as polyester. The isolated cellulose and polyester molecules may be used in a variety of downstream applications. In one application, isolated cellulose and polyester molecules are extruded to provide regenerated cellulose fibers and regenerated polyester fibers having desirable (and selectable) properties that are usable in various industrial applications, including textile production.

The present invention provides a medical dressing article and a method of manufacturing the same, which comprises: (a) a first layer comprised of polycaprocaptone fibers having a PCL fiber diameter of 0.5 μm and 2.9 μm; (b) a second layer, deposited directly on the first layer, including a mixture of polycaprolactone and poloxamer fibers (PCL and POX fibers) wherein a PCL and POX fiber diameter is between 0.1 μm and 4 μm; and (c) a third layer, deposited directly on the second layer, further comprising a mixture of gelatin and silver nitrate (AgNO.sub.3).

A lightweight heat-preserving fiber and a preparation method thereof are provided, wherein the fiber is prepared by measuring, composite spinneret's extruding, cooling, oiling, drawing, heat setting and winding a polyester melt. The composite spinneret has a hollow spinning hole and a circular spinning hole. The ratio of the micropore length of hollow spinning hole to circular spinning hole equals to the ratio of the equivalent diameter of hollow spinning hole to circular spinning hole multiplies the coefficient K, and the equivalent diameter is the ratio of the cross-sectional area to the circumference of the cross-section, the coefficient K ranges from 0.97 to 1.03. The oil agent contains a crown ether, and the content of the crown ether ranges from 67.30 to 85.58 wt %. The thermal conductivity of a knitted fabric having a basis weight of 100 g/m.sup.2 prepared by lightweight heat-preserving fiber is no larger than 0.150 W/m.Math.K.

A lightweight heat-preserving fiber and a preparation method thereof are provided, wherein the fiber is prepared by measuring, composite spinneret's extruding, cooling, oiling, drawing, heat setting and winding a polyester melt. The composite spinneret has a hollow spinning hole and a circular spinning hole. The ratio of the micropore length of hollow spinning hole to circular spinning hole equals to the ratio of the equivalent diameter of hollow spinning hole to circular spinning hole multiplies the coefficient K, and the equivalent diameter is the ratio of the cross-sectional area to the circumference of the cross-section, the coefficient K ranges from 0.97 to 1.03. The oil agent contains a crown ether, and the content of the crown ether ranges from 67.30 to 85.58 wt %. The thermal conductivity of a knitted fabric having a basis weight of 100 g/m.sup.2 prepared by lightweight heat-preserving fiber is no larger than 0.150 W/m.Math.K.

A method for preparing a carbon nanodot-fluorescent polymer composite includes subjecting a reactant and a biological component to a reaction at 260° C. to 290° C., so as to obtain the carbon nanodot-fluorescent polymer composite containing a polymer and carbon nanodots dispersed in the polymer. The biological component includes at least one of collagen, chitin, gelatin, and sodium alginate. The reactant is selected from a reaction component or a polycondensate formed therefrom. The reaction component includes terephthalic acid having carboxylic acid groups and ethylene glycol capable of reacting with such groups. Also disclosed are the carbon nanodot-fluorescent polymer composite and a carbon nanodot-fluorescent composite fiber including the same.

Fibrous structures, for example pre-moistened fibrous structures, having a novel contact surface (micro protrusion surface) and methods for using the fibrous structures and making the fibrous structures are provided.

Fibrous structures, for example pre-moistened fibrous structures, having a novel contact surface (micro protrusion surface) and methods for using the fibrous structures and making the fibrous structures are provided.

A temperature-sensing and humidity-controlling fiber includes a hydrophilic material and a temperature-sensing material. The temperature-sensing material has a lower critical solution temperature (LCST) between 31.2° C. and 32.5° C. when a light transmittance thereof is in a range from 3% to 80%, in which a wavelength of the light is between 450 nm and 550 nm.

A temperature-sensing and humidity-controlling fiber includes a hydrophilic material and a temperature-sensing material. The temperature-sensing material has a lower critical solution temperature (LCST) between 31.2° C. and 32.5° C. when a light transmittance thereof is in a range from 3% to 80%, in which a wavelength of the light is between 450 nm and 550 nm.

Method and system for manufacturing bulked continuous filament having tonal coloring from PET comprising: an extruder (202); a static mixing assembly (208) coupled to the extruder and comprising a housing and one or more individual static mixing elements disposed within the housing; the method and system further comprising a plurality of colorant ports along a length of the static mixing assembly such that each of the plurality of colorant ports is configured to provide colorant (204) to a polymer stream at a different location along the length of the static mixing assembly, and one or more spinning machines (212) positioned downstream of the static mixing assembly and coupled to the static mixing assembly to receive the colored polymer stream. The spinning machine(s) may be configured to form the colored polymer stream into bulked continuous carpet filament having a tonal color effect.