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Microfilament manufacturing method and manufacturing apparatus therefor

外国特許コード F110005744
整理番号 P07-001US
掲載日 2011年9月13日
出願国 アメリカ合衆国
出願番号 52269808
公報番号 20100148406
公報番号 8057730
出願日 平成20年1月9日(2008.1.9)
公報発行日 平成22年6月17日(2010.6.17)
公報発行日 平成23年11月15日(2011.11.15)
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
  • 特願2007-000964 (2007.1.9) JP
  • 特願2007-227981 (2007.9.3) JP
  • 2008WO-JP50103 (2008.1.9) WO
発明の名称 (英語) Microfilament manufacturing method and manufacturing apparatus therefor
発明の概要(英語) (US8057730)
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).
特許請求の範囲(英語) [claim1]
1. A method for manufacturing a microfilament, comprising the steps of supplying an original filament to an orifice under P1 pressure using a filament transfer means, then heating the filament under P2 pressure (P1>P2) using an infrared light beam and drawing the filament, wherein drawing tension is generated by a gas flow derived from a pressure difference between P1 and P2, wherein the center of said infrared light beam is radiated on the original filament within 30 mm of the exit of the orifice, and wherein the pressure difference between P1 and P2 before and after said orifice is P1 >= 2P2.
[claim2]
2. A method for manufacturing a microfilament according to claim 1, wherein the draw ratio in said drawing step is at least 10,000, and the filament diameter after the drawing is less than 1 mu m.
[claim3]
3. A method for manufacturing a microfilament according to claim 1, wherein said pressure P2 is lower than 101.3 kPa.
[claim4]
4. A method for manufacturing a microfilament according to claim 1, wherein the air speed inside said orifice is at least 342 m/sec.
[claim5]
5. A method for manufacturing a microfilament according to claim 1, wherein said infrared light beam is used to heat the center of said original filament within a 4 mm range up and down along the filament axis.
[claim6]
6. A method for manufacturing a microfilament according to claim 1, wherein when the internal diameter D of the exit section and the diameter d of said original filament satisfies the relationship 1.2d<D<10d.
[claim7]
7. A method for manufacturing a non-woven fabric comprising the microfilament according to claim 1, obtained by accumulating said drawn filament on a moving conveyer.
[claim8]
8. 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.
[claim9]
9. A method for manufacturing a microfilament according to claim 1, wherein said drawn filament is continuously wound.
[claim10]
10. A manufacturing apparatus for a microfilament comprising; an original filament supply chamber under pressure P1 containing a means to transfer the original filament,
an orifice positioned in said original filament supply chamber through which said original filament passes,
a drawing chamber, connected to said original filament supply chamber through said orifice, within which said original filament that passed through said orifice is heated using an infrared light beam and drawn, and wherein the drawing chamber under pressure P2 wherein the pressure difference between P1 and P2 is P1 >= 2P2 and drawing tension is generated by a gas flow derived from the pressure difference,
and an infrared ray irradiation device that radiates said infrared light beam so that the center of the light beam focuses on said original filament within 30 mm of the exit of said orifice.
[claim11]
11. A manufacturing apparatus for a microfilament according to claim 10, wherein the pressure difference is set so that the air speed inside said orifice is at least 342 m/sec.
[claim12]
12. A manufacturing apparatus for a microfilament according to claim 10, wherein said original filament supply chamber is under atmospheric pressure and said drawing chamber is under reduced pressure.
[claim13]
13. A manufacturing apparatus for a microfilament according to claim 10, wherein the apparatus is constructed so that the light beam radiated from said infrared light beam irradiation device focuses on the center of said original filament within 4 mm range up and down along the filament axis direction.
[claim14]
14. A manufacturing apparatus for a microfilament according to claim 10, wherein said infrared light beam is a laser beam and said infrared ray irradiation device is a laser emitter.
[claim15]
15. A manufacturing apparatus for a microfilament according to claim 10, wherein said infrared ray irradiation device contains a mirror that reflects the same light beam and irradiates said original filament from multiple locations on said original filament.
[claim16]
16. A manufacturing apparatus for a microfilament according to claim 10, wherein said infrared ray irradiation device contains multiple light sources that irradiate said original filament from multiple locations.
[claim17]
17. A manufacturing apparatus for a microfilament according to claim 10, wherein the internal diameter D of said orifice exit, said original filament diameter is d and D and d satisfy the relationship 1.2d<D<10d.
[claim18]
18. A manufacturing apparatus for non-woven fabrics comprising the microfilament according to claim 10, wherein said apparatus is constructed so that a moving conveyer is installed in said drawing chamber and said drawn filament is allowed to accumulate on said conveyer.
[claim19]
19. A manufacturing apparatus for a microfilament according to claim 10, wherein said drawing chamber is equipped with a filament winding device.
  • 発明者/出願人(英語)
  • SUZUKI AKIHIRO
  • UNIVERSITY OF YAMANASHI
国際特許分類(IPC)
米国特許分類/主・副
  • D02J001/22
  • D04H003/00
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