US 11,951,692 B2
Fiber-reinforced resin material, molded article, method and device for manufacturing fiber-reinforced resin material, and fiber bundle group inspection device
Hiroshi Iwata, Tokyo (JP); Nobuyuki Yamamoto, Tokyo (JP); Hajime Okutsu, Tokyo (JP); Ryuichi Ishikawa, Tokyo (JP); Koichi Akiyama, Tokyo (JP); and Takayuki Kobayashi, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Jan. 18, 2023, as Appl. No. 18/155,773.
Application 18/155,773 is a division of application No. 16/374,875, filed on Apr. 4, 2019, granted, now 11,597,165.
Application 16/374,875 is a division of application No. 15/738,380, granted, now 10,343,352, issued on Jul. 9, 2019, previously published as PCT/JP2016/068862, filed on Jun. 24, 2016.
Claims priority of application No. 2015-126814 (JP), filed on Jun. 24, 2015; application No. 2015-160158 (JP), filed on Aug. 14, 2015; and application No. 2015-252244 (JP), filed on Dec. 24, 2015.
Prior Publication US 2023/0150210 A1, May 18, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 70/12 (2006.01); B29B 11/16 (2006.01); B29B 15/08 (2006.01); B29B 15/12 (2006.01); B29C 43/48 (2006.01); B29C 43/58 (2006.01); C08J 5/04 (2006.01); G01N 21/84 (2006.01); G01N 23/00 (2006.01)
CPC B29C 70/12 (2013.01) [B29B 11/16 (2013.01); B29B 15/08 (2013.01); B29B 15/122 (2013.01); B29C 43/48 (2013.01); B29C 43/58 (2013.01); C08J 5/042 (2013.01); C08J 5/043 (2013.01); G01N 21/84 (2013.01); G01N 23/00 (2013.01); C08J 2300/24 (2013.01); G01N 2021/8416 (2013.01); G01N 2021/8444 (2013.01); G01N 2021/845 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A sheet-shaped fiber-reinforced resin material comprising dispersed carbon fiber bundles impregnated with a thermosetting resin and having a longitudinal direction and a width direction, wherein a diffracted X-ray at a diffraction angle 2θ of 25.4° is detected by an X-ray diffraction method, and a roughness β obtained by the following Formulas (1) to (3) is in a range of 0.5 to 4.5,

OG Complex Work Unit Math
wherein:
f(ϕi) is a luminance obtained by subtracting an average luminance from a luminance (I(ϕi)) at an i-th rotation angle (ϕi) in X-ray diffraction measurement represented by the following Formula (2),
dϕ is a step width of the X-ray diffraction measurement, I(ϕi) is normalized so that an integration strength represented by the following Formula (3) becomes 10000:

OG Complex Work Unit Math