A device for producing electrospun polymer short fibers has a dosing electrode (1) and a collector medium (3) opposite the dosing electrode (1) in the dosing direction (2). In order to create a device that enables continuous production of electrospun polymer short fibers, a cutting grid (5), which can be heated at least to the softening temperature of the polymer and which has a mesh size that corresponds to the minimum fiber length, is arranged upstream of the collector medium (3) in the dosing direction (2).

A device for producing electrospun polymer short fibers has a dosing electrode (1) and a collector medium (3) opposite the dosing electrode (1) in the dosing direction (2). In order to create a device that enables continuous production of electrospun polymer short fibers, a cutting grid (5), which can be heated at least to the softening temperature of the polymer and which has a mesh size that corresponds to the minimum fiber length, is arranged upstream of the collector medium (3) in the dosing direction (2).

Staple fibers and filament yarns formed from cellulose esters, such as cellulose acetate, are described herein, along with methods of making the fibers and their use in nonwoven fabrics and articles. The filament yarns and fibers described herein may be coated with at least one finish and, in some cases, may be coated with two or more finishes selected to enhance the properties of the fibers. Staple fibers as described herein may be used to produce nonwoven webs that are strong, soft, absorbent, and biodegradable, and may be used in wet or dry nonwoven articles for a variety personal care, medical, industrial, and commercial applications.

Staple fibers and filament yarns formed from cellulose esters, such as cellulose acetate, are described herein, along with methods of making the fibers and their use in nonwoven fabrics and articles. The filament yarns and fibers described herein may be coated with at least one finish and, in some cases, may be coated with two or more finishes selected to enhance the properties of the fibers. Staple fibers as described herein may be used to produce nonwoven webs that are strong, soft, absorbent, and biodegradable, and may be used in wet or dry nonwoven articles for a variety personal care, medical, industrial, and commercial applications.

A method of making a pilling-resistant fabric is provided. In one instance, the method comprises (a) blending a cellulose acetate (CA) staple fiber with a non-CA staple fiber to form a blended yarn comprising 20 to 80 wt % of the CA staple fiber and (b) forming a pilling-resistant fabric comprising the blended yarn. In another instance, the method comprises (a) providing a first yarn comprising at least 20 wt % of a CA staple fiber and (b) forming a pilling-resistant fabric comprising the first yarn and a second yarn comprising a non-CA staple fiber. The CA staple fiber has (i) a round or closed-C cross-sectional shape, (ii) a cut length of 20 to 80 mm, (iii) a crimp frequency of 4 to 24 crimps per inch (CPI), and (iv) a denier per filament (DPF) of 0.5 to 4.0. The pilling-resistant fabric has a higher pilling resistance rating than a fabric made without the CA staple fiber.

A method of making a pilling-resistant fabric is provided. In one instance, the method comprises (a) blending a cellulose acetate (CA) staple fiber with a non-CA staple fiber to form a blended yarn comprising 20 to 80 wt % of the CA staple fiber and (b) forming a pilling-resistant fabric comprising the blended yarn. In another instance, the method comprises (a) providing a first yarn comprising at least 20 wt % of a CA staple fiber and (b) forming a pilling-resistant fabric comprising the first yarn and a second yarn comprising a non-CA staple fiber. The CA staple fiber has (i) a round or closed-C cross-sectional shape, (ii) a cut length of 20 to 80 mm, (iii) a crimp frequency of 4 to 24 crimps per inch (CPI), and (iv) a denier per filament (DPF) of 0.5 to 4.0. The pilling-resistant fabric has a higher pilling resistance rating than a fabric made without the CA staple fiber.

Staple fibers and compositions formed from staple fibers are disclosed herein. The fibers are functionalized with molecules that render fabrics comprising the disclosed fibers hydrophobic, hydrophilic, and/or release molecules upon exposure to an external stimulus. Also presented are methods of synthesizing the same and a fabric comprising woven yarns including the staple fiber.

Staple fibers and compositions formed from staple fibers are disclosed herein. The fibers are functionalized with molecules that render fabrics comprising the disclosed fibers hydrophobic, hydrophilic, and/or release molecules upon exposure to an external stimulus. Also presented are methods of synthesizing the same and a fabric comprising woven yarns including the staple fiber.

The present disclosure is directed toward an improved nanofibrous electret filtration media of which the stand-alone electret nanofibrous web comprises a single source randomly intermingled fiber network that yields high breathability due to the high porosity and improved filtration efficiency for use as improved filtration media for respiratory devices and face masks.

The present disclosure is directed toward an improved nanofibrous electret filtration media of which the stand-alone electret nanofibrous web comprises a single source randomly intermingled fiber network that yields high breathability due to the high porosity and improved filtration efficiency for use as improved filtration media for respiratory devices and face masks.