In the process of preparing nanofibers by using an electrospinning process and preparing micron fibers by using a flash-spinning process, an electrospinning nozzle and a flash-spinning nozzle are controlled to be located above a receiving conveyor belt, and are directly opposite to each other with a spacing of 15-40 cm, and the electrospinning nozzle is controlled to be connected to a high-voltage power supply, and the flash-spinning nozzle and the receiving conveyor belt are controlled to be grounded to prepare a product; the prepared product has a film-like structure and consists of nanofibers and micron fibers. The micron fibers are mutually entangled, curled and interpenetrated, and the nanofibers are uniformly interspersed and distributed within the micron fibers, some of the nanofibers and the micron fibers forming entangled and interpenetrated structures, with mutual bonding between the nanofibers, between the micron fibers and between the nanofibers and the micron fibers.

An antimicrobial photoactive nanofibrous polymer material with polymer nanofibers has hydrophobic domains and hydrophilic domains. At least one photoactive molecule encapsulated in the hydrophobic domains of the polymer nanofibers is a photoactive molecule being capable of releasing or generating an antimicrobially active substance after irradiation by visible light. The antimicrobial photoactive nanofibrous polymer material may be used for antimicrobial wound dressings, antimicrobial cosmetic facial masks, self-disinfecting face masks or respirators, self-disinfecting filters for filtration of gases or liquids, self-disinfecting textile and products made thereof, self-disinfecting packaging material or protective agriculture foils.

An antimicrobial photoactive nanofibrous polymer material with polymer nanofibers has hydrophobic domains and hydrophilic domains. At least one photoactive molecule encapsulated in the hydrophobic domains of the polymer nanofibers is a photoactive molecule being capable of releasing or generating an antimicrobially active substance after irradiation by visible light. The antimicrobial photoactive nanofibrous polymer material may be used for antimicrobial wound dressings, antimicrobial cosmetic facial masks, self-disinfecting face masks or respirators, self-disinfecting filters for filtration of gases or liquids, self-disinfecting textile and products made thereof, self-disinfecting packaging material or protective agriculture foils.

An improved process for forming a PTFE mat is described. The process includes providing a dispersion with PTFE, a fiberizing polymer and a solvent wherein said dispersion has a viscosity of at least 50,000 cP. An apparatus is provided which comprises a charge source and a target a distance from the charge source. A voltage source is provided which creates a first charge at the charge source and an opposing charge at the target. The dispersion is electrostatically charged by contact with the charge source. The electrostatically charged dispersion is collected on the target to form a mat precursor which is heated to remove the solvent and the fiberizing polymer thereby forming the PTFE mat.

An improved process for forming a PTFE mat is described. The process includes providing a dispersion with PTFE, a fiberizing polymer and a solvent wherein said dispersion has a viscosity of at least 50,000 cP. An apparatus is provided which comprises a charge source and a target a distance from the charge source. A voltage source is provided which creates a first charge at the charge source and an opposing charge at the target. The dispersion is electrostatically charged by contact with the charge source. The electrostatically charged dispersion is collected on the target to form a mat precursor which is heated to remove the solvent and the fiberizing polymer thereby forming the PTFE mat.

An improved process for forming a PTFE mat is described. The process includes providing a dispersion with PTFE, a fiberizing polymer and a solvent wherein said dispersion has a viscosity of at least 50,000 cP. An apparatus is provided which comprises a charge source and a target a distance from the charge source. A voltage source is provided which creates a first charge at the charge source and an opposing charge at the target. The dispersion is electrostatically charged by contact with the charge source. The electrostatically charged dispersion is collected on the target to form a mat precursor which is heated to remove the solvent and the fiberizing polymer thereby forming the PTFE mat.

The present invention relates to a method of manufacturing a hydrophilized hollow fiber membrane by a continuous process using an extruder. According to the method of the present invention, thermal curing agent in the form of a monomer or a oligomer is added to a polymer solution, and in the melt state before a separation membrane is manufactured, thermal polymerization occurs due to an initial reaction of a thermal initiator at the appropriate temperature within a cylinder of the extruder. Thus, a hydrophilic component is evenly distributed into the membrane at the micro-level, and the hydrophilic component is not washed out, resulting in very high stability. Another advantage is high economic value and efficiency because the process for hydrophilizing the membrane as well as the process for manufacturing the membrane is carried out by the continuous process using the extruder without using conventional extrusion equipment in the form of an agitator.

A fiber for artificial hair having a plurality of single fibers, in which the single fibers each contain (A) a vinyl chloride polymer, (B) an aromatic vinyl polymer, and (C) a (meth)acrylic acid-based polymer, a content of the component (B) is more than 0% by mass and 50% by mass or less on the basis of the total amount of the component (A) and the component (B), a content of the component (C) is more than 0% by mass and 8% by mass or less on the basis of the total amount of the component (A) and the component (B), and a coefficient of variation of fineness of the single fibers is 35 or less.

A fiber for artificial hair having a plurality of single fibers, in which the single fibers each contain (A) a vinyl chloride polymer, (B) an aromatic vinyl polymer, and (C) a (meth)acrylic acid-based polymer, a content of the component (B) is more than 0% by mass and 50% by mass or less on the basis of the total amount of the component (A) and the component (B), a content of the component (C) is more than 0% by mass and 8% by mass or less on the basis of the total amount of the component (A) and the component (B), and a coefficient of variation of fineness of the single fibers is 35 or less.

A vinyl chloride-based fiber includes a vinyl chloride-based resin composition. The vinyl chloride-based resin composition includes a vinyl chloride-based resin A and a vinyl chloride-based resin B. The vinyl chloride-based resin A is a copolymer of vinyl chloride and a macromonomer and the vinyl chloride-based resin B is a vinyl chloride-based resin other than the vinyl chloride-based resin A. A method for producing the vinyl chloride-based fiber includes a step of obtaining undrawn yarn by melt-spinning the vinyl chloride-based resin composition.