Techniques are described for controlling widths of nanofiber sheets drawn from a nanofiber forest. Nanofiber sheet width can be controlled by dividing or sectioning the nanofiber sheet in its as-drawn state into sub-sheets as the sheet is being drawn. A width of a sub-sheet can be controlled or selected so as to contain regions of uniform nanofiber density within a sub-sheet (thereby improving nanofiber yarn consistency) or to isolate an inhomogeneity (whether a discontinuity is the sheet (e.g., a tear) or a variation in density) within a sub-sheet. Techniques for dividing a nanofiber sheet into sub-sheets includes mechanical, corona, and electrical arc techniques.

A method of manufacturing a wearable material made from interweaving a primary yarn of recycled sheets of plasticized material and a water-proof companion yarn is provided. The wearable material may be rendered into articles of clothing as well as protective gear such as face masks or face mask covers.

The invention relates to a polymer-based artificial turf fiber comprising substances (216) adapted for protecting the fiber against UV radiation. The substances comprise a hindered amine light stabilizerHALS and a first and a second UV-absorbent substance. The molecular weights of the first and the second UV-absorbent substances differ from each other by at least 100 g/mol.

The present disclosure relates to a polyethylene resin composition exhibiting excellent processability and bubble stability, which can provide a film or fiber having excellent physical properties through various processes. The polyethylene resin composition includes a first polyethylene resin having a density of 0.950 g/cm.sup.3 to 0.960 g/cm.sup.3, a weight average molecular weight of 80000 g/mol to 100000 g/mol and a molecular weight distribution of 3.3 to 4.0; and a second polyethylene resin having a density of 0.950 g/cm.sup.3 to 0.960 g/cm.sup.3, a weight average molecular weight of 500000 g/mol to 600000 g/mol and a molecular weight distribution of 1.3 to 2.0.

A GDL cutting system of a fuel cell includes: a laser-cutting device that forms a gas diffusion layer by radiating a laser on the surface of a GDL fabric panel moving on a conveyer; an adsorbing-conveying device that adsorbs and conveys at least two gas diffusion layers cut by the laser-cutting device; a first vision sensor that senses an upper side of the gas diffusion layers cut by the laser-cutting device; and a second vision sensor that senses a lower side of the gas diffusion layers adsorbed and conveyed by the adsorbing-conveying device.

A GDL cutting system of a fuel cell includes: a laser-cutting device that forms a gas diffusion layer by radiating a laser on the surface of a GDL fabric panel moving on a conveyer; an adsorbing-conveying device that adsorbs and conveys at least two gas diffusion layers cut by the laser-cutting device; a first vision sensor that senses an upper side of the gas diffusion layers cut by the laser-cutting device; and a second vision sensor that senses a lower side of the gas diffusion layers adsorbed and conveyed by the adsorbing-conveying device.

Polyethylene (PE) and porous PE filaments and methods of manufacturing such filaments are disclosed for various applications, including dental floss, medical sutures, and in garments or other textile fabrics. The PE filaments may be expanded, folded, and/or otherwise manipulated to achieve desired characteristics, including porosity. The PE filaments may be light-weight, easy to grip, easy-gliding, non-shredding, and comfortable.

A consumable material for use in an extrusion-based digital manufacturing system, the consumable material comprising a length and a cross-sectional profile of at least a portion of the length that is axially asymmetric. The cross-sectional profile is configured to provide a response time with a non-cylindrical liquefier of the extrusion-based digital manufacturing system that is faster than a response time achievable with a cylindrical filament in a cylindrical liquefier for a same thermally limited, maximum volumetric flow rate.

A Japanese paper yarn manufacturing device according to the present invention that provides a method for mass-production of inexpensive Japanese paper yarns by saving labor includes a slitter that slits a Japanese paper sheet fed out from a Japanese paper roll into a plurality of Japanese paper tapes each having a narrow width in a feeding direction, and a distributing section that distributes the plurality of slit Japanese paper tapes. An air flow section feeds air into a plurality of the tubes of the distributing section, so that the distributed Japanese paper tapes are sent in a floating manner to a plurality of yarn processing device units.

The present invention relates to a tape comprising a composition comprising a copolyester comprising polymeric units derived from ethylene glycol and terephthalic acid or a diester thereof and >0.50 and <5.00 wt % of polymeric units with regard to the total weight of the polyester derived from an oligomeric dihydroxy compound having a number average molecular weight of >500 g/mol and <5000 g/mol. Such tape has an improved tensile-impact strength and a reduced proneness to splitting during weaving.