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Microfilament manufacturing method and manufacturing apparatus

外国特許コード F110005747
整理番号 P07-001EP
掲載日 2011年9月13日
出願国 欧州特許庁(EPO)
出願番号 08702974
公報番号 2103723
公報番号 2103723
出願日 平成20年1月9日(2008.1.9)
公報発行日 平成21年9月23日(2009.9.23)
公報発行日 平成26年3月12日(2014.3.12)
国際出願番号 JP2008050103
国際公開番号 WO2008084797
国際出願日 平成20年1月9日(2008.1.9)
国際公開日 平成20年7月17日(2008.7.17)
優先権データ
  • 2008JP050103 (2008.1.9) WO
  • 特願2007-000964 (2007.1.9) JP
  • 特願2007-227981 (2007.9.3) JP
発明の名称 (英語) Microfilament manufacturing method and manufacturing apparatus
発明の概要(英語) The objective of the present invention is to enable a microfilament that is a nanofilament to be manufactured continuously and consistently from all thermoplastic polymers without requiring a specialized high precision.high performance apparatus and also to present the nanofilament manufactured as described.
The present invention comprises a microfilament in a nanofilament region and the manufacturing means thereof wherein a original filament transferred using a filament transfer means is supplied to an orifice under pressure P1 and is heated and drawn using an infrared light beam directly under the orifice under pressure P2 (P1>P2).(see diagramm)
特許請求の範囲(英語) [claim1]
1. A method for manufacturing a microfilament, comprising the steps of: (i) transferring an original filament (1) by using a filament transfer means; (ii) drawing the original filament (1) by supplying said original filament (1) from an original filament supply chamber (15) under P1 pressure to an orifice (14) and introducing said original filament (1) to a drawing chamber (21) maintained under P2 pressure, while
(ii-1) setting a pressure difference between P1and P2 before and after said orifice (14) such that P1 >= 2P2; and
(ii-2) heating original filament (1) in said drawing chamber (21) under P2 pressure using an infrared light beam (48).
[claim2]
2. A method for manufacturing nanofilament according to claim 1, wherein the draw ratio in said drawing is at least 10,000, and the filament diameter after the drawing is less than 1 micron m.
[claim3]
3. A method for manufacturing nanofilament according to claim 1, wherein said pressure P2 in said drawing is reduced pressure (lower than 101.3 kPa).
[claim4]
4. A method for manufacturing nano-filament according to claim 1, wherein the air speed inside said orifice in said drawing is at least 342 m/sec.
[claim5]
5. A method for manufacturing microfilament according to claim 1, wherein the drawing of said filament is conducted near the exit from said orifice at a distance of 30 mm or closer.
[claim6]
6. A method for manufacturing microfilament according to claim 1, wherein said infrared light beam (48) is used to heat the center of said original filament (1) within a 4 mm range up and down along the filament axis.
[claim7]
7. A method for manufacturing microfilament according to claim 1, wherein 1.2d<D<10d when the internal diameter of the exit section of said orifice is D and the diameter of said original filament is d.
[claim8]
8. A method for manufacturing a non-woven fabrics comprising the microfilament according to claim 1, obtained by accumulating said drawn filament on a moving conveyer (51).
[claim9]
9. A method for manufacturing a laminated material and a cloth-like material of the microfilament according to claim 1, obtained by accumulating said drawn filament on said cloth-like material in motion.
[claim10]
10. A method for manufacturing microfilament according to claim 1, wherein said drawn filament is continuously wound.
[claim11]
11. A manufacturing apparatus for microfilament comprising; - an original filament supply chamber (15) under pressure P1 containing a means to transfer the original filament (1), - an orifice (14) positioned in said original filament supply chamber (15) through which said original filament (1) passes, - a drawing chamber (21) under pressure P2 wherein the pressure difference between P1 and P2 before and after said orifice is P1 >= 2P2 that is connected to said original filament supply chamber (15) through said orifice (14) in which said original filament (1) that passed through said orifice (14) is heated using an infrared light beam (48) and drawn, and - an infrared ray irradiation device (47) that radiates said infrared light beam (48).
[claim12]
12. A manufacturing apparatus for microfilament according to claim 11, wherein the pressure difference is set so that the air speed inside said orifice is at least 342 m/sec.
[claim13]
13. A manufacturing apparatus for microfilament according to claim 11, wherein said original filament supply chamber (15) is under atmospheric pressure and said drawing chamber (21) is under reduced pressure.
[claim14]
14. A manufacturing apparatus for microfilament according to claim 11, wherein the apparatus is constructed so that the center of the light beam (48) radiated from said infrared light beam irradiation device (47) focuses on said original filament (1) within 30 mm from the exit of said orifice.
[claim15]
15. A manufacturing apparatus for microfilament according to claim 11, wherein the apparatus is constructed so that the light beam (48) radiated from said infrared light beam irradiation device (47) focuses on the center of said original filament (1) within 4 mm range up and down along the filament axis direction.
[claim16]
16. A manufacturing apparatus for microfilament according to claim 11, wherein said infrared light beam (48) is a laser beam (6) and said infrared ray irradiation device is a laser emitter (5).
[claim17]
17. A manufacturing apparatus for microfilament according to claim 11, wherein said infrared ray irradiation device (47) contains a mirror that reflects the same light beam and irradiates said original filament (1) from multiple locations on said original filament.
[claim18]
18. A manufacturing apparatus for microfilament according to claim 11, wherein said infrared ray irradiation device (47) contains multiple light sources that irradiate said original filament (1) from multiple locations.
[claim19]
19. A manufacturing apparatus for microfilament according to claim 11, wherein the internal diameter of said orifice (14) exit is D and 1.2d<D<10d when said original filament diameter is d.
[claim20]
20. A manufacturing apparatus for non-woven fabrics comprising the microfilament according to claim 12, wherein said apparatus is constructed so that a moving conveyer (51) is installed in said drawing chamber (21) and said drawn filament is allowed to accumulate on said conveyer (51).
[claim21]
21. A manufacturing apparatus for microfilament according to claim 12, wherein said drawing chamber (21) is equipped with a filament winding device.
  • 出願人(英語)
  • UNIVERSITY OF YAMANASHI
  • 発明者(英語)
  • SUZUKI AKIHIRO
国際特許分類(IPC)
欧州特許分類/主・副
  • D02J001/22
  • D04H003/00
指定国 Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
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