US 11,717,988 B2
Resin pellet and method of producing resin pellet
Toshihiko Manami, Chihara (JP); and Shohei Ueno, Chihara (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Filed on Aug. 13, 2020, as Appl. No. 16/992,431.
Claims priority of application No. 2019-197407 (JP), filed on Oct. 30, 2019.
Prior Publication US 2021/0129382 A1, May 6, 2021
Int. Cl. B29B 9/12 (2006.01); B29B 9/06 (2006.01); C08L 23/06 (2006.01)
CPC B29B 9/12 (2013.01) [B29B 9/06 (2013.01); C08L 23/06 (2013.01); B29K 2023/06 (2013.01); Y10T 428/2982 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A resin pellet having a recess, wherein
when a height of the resin pellet in a case in which the resin pellet is disposed on a horizontal plane in such a manner that the recess faces the horizontal plane is defined as T1, and a maximum diameter of the resin pellet as viewed from a direction orthogonal to the horizontal plane is defined as L, an aspect ratio defined by L/T1 is 1.4 to 1.5, and
wherein when cross-sectional images of the resin pellet perpendicular to the horizontal plane and perpendicular to a direction of the maximum diameter L are obtained by an X-ray CT apparatus at regular intervals in the direction of the maximum diameter L, a width W of the recess in the cross-sectional image, in which a depth D of the recess is maximized, is 1.7 mm to 2.3 mm,
where the depth D of the recess is a distance between a tangent line tangent to two protrusions on both sides of the recess and the deepest portion of the recess in the cross-sectional image, in which a depth D of the recess is maximized, and the width W of the recess is a distance between tangent points of the two protrusions on the tangent line in the cross-sectional image, in which a depth D of the recess is maximized.