PROCESS FOR THE PRODUCTION OF SPUNBONDED NONWOVEN

    公开(公告)号:US20230051927A1

    公开(公告)日:2023-02-16

    申请号:US17787028

    申请日:2020-12-11

    摘要: The invention relates to a process (100, 101) for the production of spunbonded nonwovens (1.1, 1.2, 1.3) and a device (200, 201) for the production of spunbonded nonwovens (1.1, 1.2, 1.3), wherein, in the process (100, 101), a spinning mass (2) is extruded through a plurality of nozzle holes (4.1, 4.2, 4.3) of at least a first spinneret (3.1) and a second spinneret (3.2) to form filaments (5.1, 5.2, 5.3) and the filaments (5.1, 5.2, 5.3) are drawn, in each case, in the extrusion direction, with the filaments (5.1) of the first spinneret (3.1) being deposited on the conveyor belt (9) to form a first spunbonded nonwoven (1.1) and the filaments (5.2) of the second spinneret (3.2) being deposited on the conveyor belt (9) to form a second spunbonded nonwoven (1.2) over the first spunbonded nonwoven (1.1) in order to obtain a multi-layered spunbonded nonwoven (10). For increasing the throughput of the process, it is suggested that the multi-layered spunbonded nonwoven (10) is separated into at least the first spunbonded nonwoven (1.1) and the second spunbonded nonwoven (1.2) in a subsequent step and the first and second spunbonded nonwovens (1.1, 1.2) after separation each undergo a hydroentanglement (15.1, 15.2) and optionally a drying (12) individually and/or are each wound up individually.

    NANOFIBER PRODUCTION APPARATUS AND NANOFIBER PRODUCTION METHOD

    公开(公告)号:US20210372008A1

    公开(公告)日:2021-12-02

    申请号:US17283710

    申请日:2019-10-09

    申请人: M-TECHX INC.

    摘要: A nanofiber production apparatus is provided having: a nanofiber generation device equipped with a liquid discharge nozzle for discharging a polymer solution in which a polymer has been dissolved in a solvent, and a hot air discharge nozzle for discharging a high-temperature, high-speed gas at high pressure; and a collection device for suctioning and collecting nanofibers generated by the nanofiber generation device. A flow path suppression means is provided between the nanofiber generation device and the nanofiber collection device, said flow path suppression means causing the nanofibers generated by the nanofiber generation device to float so that the flow of nanofibers generated by the nanofiber generation device do not directly fly straight into the nanofiber collection device.

    SOLUTION BLOW SPUN PROTEIN-BASED POLYMER FIBERS AND PRODUCTS COMPRISING SAME

    公开(公告)号:US20210123163A1

    公开(公告)日:2021-04-29

    申请号:US16605848

    申请日:2018-04-17

    申请人: Rowan University

    发明人: Xiao Hu Xiaoyang Mou

    摘要: The invention relates to non-woven protein fibers and to methods for forming and producing the same. In certain embodiments, the invention provides a method of processing a protein comprising dissolving a protein in a solution, optionally removing any insoluble materials from the solution, and spraying the solution under an applied pressure. In other embodiments, the protein can be derived from a range of sources, including but not limited to arthropod silks, animal keratin (e.g. hair and wool), tissue elastin, collagen, resilin, and plant protein. In certain embodiments, the methods of the invention are an alternative to electrospinning methods known in the art.

    Densification of polyacrylonitrile fiber

    公开(公告)号:US10344403B2

    公开(公告)日:2019-07-09

    申请号:US14980547

    申请日:2015-12-28

    发明人: Thomas B Taylor

    IPC分类号: D01F9/22 D01D5/14 D01D5/06

    摘要: Provided herewith is a process for improving tensile strength of precursor PAN fiber during the spinning stage in the manufacturing process. According to the process of the present invention, precursor fiber is made denser as it enters each wash bath. This progressive densification approach is useful for all PAN precursor bath draw/wash processes where a need for careful control of fiber network density and structure is required for improved carbon fiber properties.

    Blowing-assisted electrospinning
    9.
    发明授权

    公开(公告)号:US10138574B2

    公开(公告)日:2018-11-27

    申请号:US15712125

    申请日:2017-09-21

    IPC分类号: D01D7/00 D01D5/00 D01D5/14

    摘要: A method and an apparatus for fabricating nanofibrous articles is disclosed. The method may include providing a double-walled nozzle with an inner tube coaxially disposed within an outer tube. In addition, the double-walled nozzle is secured in front of a collector and an electrical field is applied between a tip of the double-walled nozzle and the collector. The method further includes preparing a spinning solution by dissolving a polymer in a solvent, mixing a vapor stream of the solvent with a stream of a pressurized gas with a predetermined ratio to obtain a pressurized solvent/gas stream feeding the spinning solution through the inner tube of the double-walled nozzle, and concurrently feeding the pressurized solvent/gas stream through the outer tube of the double-walled nozzle. The spinning solution and the pressurized solvent/gas stream may concurrently be discharged from the double-walled nozzle and drawn toward the collector being collected as nanofibrous articles on the collector.

    SPINNING DIE FOR MELT-BLOWING
    10.
    发明申请

    公开(公告)号:US20170355123A1

    公开(公告)日:2017-12-14

    申请号:US15613786

    申请日:2017-06-05

    摘要: A spinning die for melt-blowing has plastic passages, a hot air passage, and an opening surface, in which discharge ports and blowing ports open. Adjacent and closest two of the discharge ports are first and second proximate discharge ports. One of the blowing ports corresponding to the first proximate discharge port is a first proximate blowing port, and one of the blowing ports corresponding to the second proximate discharge port is a second proximate blowing port. The first proximate blowing port includes a guide portion that projects away from the center of the first proximate discharge port. The guide portion is formed such that, as the distance from the opening surface increases, the hot air flow guided by the guide portion flows to be separated away from the hot air flow blown onto the molten plastic discharged from the second proximate discharge port.