The present invention relates to a method for the preparation of fibers from a catalyst solution by electrospinning and further to articles comprising such fibers.

The present invention relates to a method for the preparation of fibers from a catalyst solution by electrospinning and further to articles comprising such fibers.

A method of preparing antimicrobial-containing polymeric products is provided, the method involving electrospinning a dispersion comprising a dispersible polymer, a fiberizing polymer, and one or more antimicrobial agents. The electrospun material is heated to remove solvent and the fiberizing polymer, giving a nonwoven polymeric material having antimicrobial agent incorporated therein. The material can be in the form of, for example, a non-woven sheet, tube, or covering.

A method of preparing antimicrobial-containing polymeric products is provided, the method involving electrospinning a dispersion comprising a dispersible polymer, a fiberizing polymer, and one or more antimicrobial agents. The electrospun material is heated to remove solvent and the fiberizing polymer, giving a nonwoven polymeric material having antimicrobial agent incorporated therein. The material can be in the form of, for example, a non-woven sheet, tube, or covering.

Provided is a hydrophilic fluororesin sheet having significantly improved properties such as filtering performance which includes primary fibers and secondary fibers having a smaller fiber diameter than a fiber diameter of the primary fibers, the secondary fibers crosslinking in each of the primary fibers and/or crosslinking between different primary fibers in such a manner that no knots are formed at crosslinking points, the primary fibers and the secondary fibers including fluororesin fibers including polytetrafluoroethylene [PTFE], wherein a surface of the sheet to which hydrophilization treatment has been applied.

Provided is a hydrophilic fluororesin sheet having significantly improved properties such as filtering performance which includes primary fibers and secondary fibers having a smaller fiber diameter than a fiber diameter of the primary fibers, the secondary fibers crosslinking in each of the primary fibers and/or crosslinking between different primary fibers in such a manner that no knots are formed at crosslinking points, the primary fibers and the secondary fibers including fluororesin fibers including polytetrafluoroethylene [PTFE], wherein a surface of the sheet to which hydrophilization treatment has been applied.

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.

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.

The present invention relates to a method for preparing polymer film, comprising the following steps: i) forming at least one polymer as a first membrane by electrospinning; ii) forming a first mixture by dispersing at least one mid-infrared radiation reflective material into a first liquid; iii) filtering said first mixture, wherein said first membrane is used as a filter membrane, thereby depositing said at least one mid-infrared radiation reflective material on said first membrane to form a second membrane, and iv) drying said second membrane to form a third membrane; characterized in that, said at least one polymer is selected from polyvinylidene fluoride and/or polyurethane.

The present invention relates to a method for preparing polymer film, comprising the following steps: i) forming at least one polymer as a first membrane by electrospinning; ii) forming a first mixture by dispersing at least one mid-infrared radiation reflective material into a first liquid; iii) filtering said first mixture, wherein said first membrane is used as a filter membrane, thereby depositing said at least one mid-infrared radiation reflective material on said first membrane to form a second membrane, and iv) drying said second membrane to form a third membrane; characterized in that, said at least one polymer is selected from polyvinylidene fluoride and/or polyurethane.