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US 12,643,762 B2Granted
Method for manufacturing short fibers, method for manufacturing nonwoven fabric, short fiber manufacturing device, and nonwoven fabric manufacturing device
AssigneeDaicel Corporation
InventorMasato Shigematsu
Life of this patent
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Abstract
A method for manufacturing short fibers includes relaxing entanglement of crimped cellulose acetate fibers in a tow band by applying a tension in a predetermined transfer direction to the tow band transferred in the transfer direction, the tow band containing the crimped cellulose acetate fibers and being impregnated with moisture, and forming short fibers by cutting the tow band in which the entanglement is relaxed.
Claims10
A method for manufacturing short fibers, the method comprising:
- relaxing entanglement of crimped cellulose acetate fibers in a tow band by applying a tension in a predetermined transfer direction to the tow band transferred in the transfer direction, the tow band containing the crimped cellulose acetate fibers and being impregnated with moisture;
- and
- forming short fibers by cutting the tow band in which the entanglement is relaxed, wherein
- in the relaxing entanglement, the tow band is impregnated with the moisture by bringing a mist into contact with the tow band, the mist containing superheated water vapor heated to a temperature of 100° C. or higher to relax the entanglement of the crimped cellulose acetate fibers.
1 more element
A short fiber manufacturing device comprising:
- an entanglement relaxing structure configured to relax entanglement of crimped cellulose acetate fibers in a tow band by applying a tension in a predetermined transfer direction to the tow band transferred in the transfer direction, the tow band containing the crimped cellulose acetate fibers and being impregnated with moisture by bringing a mist into contact with the tow band, the mist containing superheated water vapor heated to a temperature of 100° C. or higher to relax the entanglement of the crimped cellulose acetate fibers;
- and
- a short fiber forming structure configured to form short fibers by cutting the tow band in which the entanglement is relaxed.
Dependencies are inferred from the claim text.