Fine fiber producing method and fine fiber producing apparatus
AssigneeYamashin-Filter Corp.
InventorsHiroshi Makino, Akihiro Saito
Life of this patent
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Abstract
A fine fiber production method and a fine fiber production apparatus are provided. The fine fiber production method includes: discharging a flowable polymer compound from a discharge port provided at an extruder; forming fibers having a fiber diameter of from 50 nm to 15 μm by spraying, in a direction intersecting with a discharge direction of the flowable polymer compound, a pressurized gas from an air nozzle to the discharged flowable polymer compound, the air nozzle including a temperature control member and a spindle-shaped nozzle or a De Laval nozzle; and collecting the fibers using a collection member provided downstream in a gas spraying direction.
Claims12
A method of producing fine fibers, the method comprising:
- discharging a flowable polymer compound from a discharge port provided at an extruder;
- forming fibers having a fiber diameter of from 50 nm to 15 μm by spraying, in a direction intersecting with a discharge direction of the flowable polymer compound, a pressurized gas discharged from an air nozzle to the discharged flowable polymer compound, the air nozzle being provided on a gravity-direction lower side of the discharge port and comprising a temperature control member and a spindle-shaped nozzle or a De Laval nozzle, and the temperature control member being configured to control a temperature of the pressurized gas;
- and
- collecting the fibers using a collection member provided downstream in a gas spraying direction.
An apparatus for producing fine fibers, the apparatus comprising:
- an extruder that comprises a plurality of discharge ports and that is configured to discharge a flowable polymer compound from each of the discharge ports;
- an air nozzle member that is provided on a gravity-direction lower side that is in a vicinity of the plurality discharge ports of the extruder and that comprises a De Laval nozzle or a spindle-shaped nozzle, the air nozzle member being equipped with a gas pressurization unit that is configured to pressurize a gas to be discharged from the air nozzle member and sprayed, to the discharged flowable polymer compound, in a direction intersecting with a discharge direction of the flowable polymer compound discharged from the discharge ports, and a temperature control member that is configured to control a temperature of the gas;
- and
- a collection member provided downstream in a gas spraying direction and configured to collect formed fibers.
Dependencies are inferred from the claim text.