Title:
FIBER-REINFORCED THERMOPLASTIC RESIN FILAMENT FOR 3D PRINTER, AND MOLDED ARTICLE THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/217929
Kind Code:
A1
Abstract:
This fiber-reinforced thermoplastic resin filament for a 3D printer is formed by impregnating a plurality of continuous reinforcement fibers in a thermoplastic resin, wherein: an average value S of a roundness parameter s of a transverse section is 60-100%, the average value S being evaluated by (i) taking a photograph of the transverse section perpendicular to the axial direction of the filament, (ii) drawing an inscribed circle and a circumscribed circle of the filament in a cross-sectional image and determining the diameter length of each, (iii) calculating the roundness parameter s defined by a formula (1), and (iv) repeating the procedures (i)—(iii) at a plurality of locations on the filament and calculating the average value S of the roundness parameter s; and the coefficient of variance of the diameter length of the circumscribed circle is 0–10%. This filament, because of high roundness, has outstanding processability and formation stability during molding by a 3D printer and has outstanding qualities of homogeneity in the void fraction and the reinforced fibers as well as straightness of the reinforcement fibers.
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Inventors:
ISHIDA SHOMA (JP)
SUZUKI KOJI (JP)
NARUSE YOSHIHIRO (JP)
SUZUKI KOJI (JP)
NARUSE YOSHIHIRO (JP)
Application Number:
PCT/JP2020/015294
Publication Date:
October 29, 2020
Filing Date:
April 03, 2020
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B29B11/16; B29C64/118; B29C64/314; B29C64/386; B33Y70/00; B33Y80/00; B29K105/08
Foreign References:
| JP2016518267A | 2016-06-23 | |||
| JP2019018399A | 2019-02-07 | |||
| JP2017128072A | 2017-07-27 | |||
| JP2013026171A | 2013-02-04 | |||
| JPH0550434A | 1993-03-02 | |||
| JP2009500194A | 2009-01-08 | |||
| JP2017128072A | 2017-07-27 |
Attorney, Agent or Firm:
BAN Toshimitsu et al. (JP)
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