US 12,337,553 B2
Composite material molded article and method for manufacturing same
Yasutaka Shinoura, Tokyo (JP); Takayuki Kobayashi, Tokyo (JP); Takuya Miyauchi, Tokyo (JP); and Takeshi Ishikawa, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Sep. 22, 2020, as Appl. No. 17/027,796.
Application 17/027,796 is a continuation of application No. PCT/JP2019/013101, filed on Mar. 27, 2019.
Claims priority of application No. 2018-060422 (JP), filed on Mar. 27, 2018; application No. 2018-128580 (JP), filed on Jul. 5, 2018; application No. 2018-159083 (JP), filed on Aug. 28, 2018; and application No. 2018-159482 (JP), filed on Aug. 28, 2018.
Prior Publication US 2021/0002436 A1, Jan. 7, 2021
Int. Cl. B29C 70/46 (2006.01); B29C 70/14 (2006.01); C08J 5/04 (2006.01); C08K 3/04 (2006.01); C08K 7/06 (2006.01); B29K 105/14 (2006.01); B29K 307/04 (2006.01)
CPC B29C 70/46 (2013.01) [B29C 70/14 (2013.01); B29C 70/465 (2013.01); C08J 5/042 (2013.01); C08K 3/04 (2013.01); C08K 7/06 (2013.01); B29K 2105/14 (2013.01); B29K 2307/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A composite material molded article, comprising:
a molded product of a molding material containing a resin and fibers,
wherein an average of the following fiber orientation degree f in the following region A of the molded product is 0.20 or more and 1 or less,
region A: in a case where a distance between one point at each of edges of a surface of a first end portion of the molded product and edges of the other end portion is measured along a vertical direction perpendicular to lateral faces of the first end portion within a surface of the molded product, and points separated from the one point by a distance equivalent to 3.0% of the distance measured from the one point are connected with a line along the edges of the first end portion of the molded product, a region surrounded with the line and edges of the molded product is regarded as a region A,
fiber orientation degree f: in a case where the vertical direction is named 90° direction, a direction orthogonal to the vertical direction is named 0° direction, and an X-ray diffracted at a diffraction angle 2θ of 25.4° is detected by X-ray diffraction, a fiber orientation degree based on the 0° direction that is calculated from the following Equations (1), (2), and (3) is a fiber orientation degree f,

OG Complex Work Unit Math
a in Equation (1) is a coefficient of orientation expressed by Equation (2), I(φi) is a luminance at an i-th rotation angle (φi) in the X-ray diffraction and is normalized such that an integrated intensity expressed by Equation (3) becomes 10,000, N in Equation (3) is the number of measurement points, and the number of measurement points is a value obtained by dividing 360(°) by a step size (°) that is an angle by which a molded product as a measurement target is rotated whenever the X-ray diffraction is measured, do in the same equation represents a micro-region of the rotation angle around the molded product as a measurement target, and do equals a value of the step size,
wherein the following function of the region A of the molded product has a negative slope,
function: a linear function obtained by measuring the fiber orientation degree f for two points at both end portions of a straight line extending in the vertical direction in the region A and for two or more points closer to the inside than the two points, plotting a distance (mm) between each of the points and the lateral faces of the first end portion on an x axis, plotting the fiber orientation degree f on a y axis, and performing linear approximation by a least square method.