US 11,951,662 B2
Foamed sheet, product, and method for producing foamed sheet
Taichi Nemoto, Shizuoka (JP); Shizuka Hashida, Kanagawa (JP); Yoshimitsu Kumai, Kanagawa (JP); Ryo Miyakoshi, Kanagawa (JP); and Tomoharu Miki, Kanagawa (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Filed by Taichi Nemoto, Shizuoka (JP); Shizuka Hashida, Kanagawa (JP); Yoshimitsu Kumai, Kanagawa (JP); Ryo Miyakoshi, Kanagawa (JP); and Tomoharu Miki, Kanagawa (JP)
Filed on Nov. 23, 2021, as Appl. No. 17/533,124.
Claims priority of application No. 2020-194084 (JP), filed on Nov. 24, 2020; application No. 2021-087826 (JP), filed on May 25, 2021; application No. 2021-158455 (JP), filed on Sep. 28, 2021; and application No. 2021-189692 (JP), filed on Nov. 22, 2021.
Prior Publication US 2022/0161467 A1, May 26, 2022
Int. Cl. B29B 7/90 (2006.01); B29C 44/02 (2006.01); B29C 44/34 (2006.01); B29K 67/00 (2006.01); B29K 105/16 (2006.01); B29L 7/00 (2006.01)
CPC B29C 44/3442 (2013.01) [B29B 7/90 (2013.01); B29C 44/02 (2013.01); B29K 2067/046 (2013.01); B29K 2105/16 (2013.01); B29L 2007/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A foamed sheet comprising:
a polylactic acid; and
a filler, wherein
the foamed sheet when measured at a compressive stress of 0.2 MPa or less has a cushioning coefficient of 10 or less, and
the foamed sheet measured at a thickness of 2 mm has a puncture strength of 2 N or more.
 
19. A product, comprising:
a polylactic acid; and
a filler, wherein
the product when measured at a compressive stress of 0.2 MPa or less has a cushioning coefficient of 10 or less, and
the product measured at a thickness of 2 mm has a puncture strength of 2 N or more.