US 12,473,415 B2
Polyolefin-based resin expanded beads, molded article of polyolefin-based resin expanded beads and method for producing polyolefin-based resin expanded beads
Takumi Sakamura, Sano (JP); Naoki Mochida, Narita (JP); and Akinobu Hira, Yokkaichi (JP)
Assigned to JSP CORPORATION, Tokyo (JP)
Appl. No. 17/439,258
Filed by JSP CORPORATION, Tokyo (JP)
PCT Filed Mar. 9, 2020, PCT No. PCT/JP2020/010123
§ 371(c)(1), (2) Date Apr. 6, 2022,
PCT Pub. No. WO2020/189389, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-051216 (JP), filed on Mar. 19, 2019.
Prior Publication US 2023/0203263 A1, Jun. 29, 2023
Int. Cl. C08J 9/18 (2006.01); C08J 3/22 (2006.01); C08J 9/00 (2006.01); C08J 9/12 (2006.01); C08J 9/228 (2006.01); C08K 3/38 (2006.01); B29C 44/44 (2006.01); B29K 23/00 (2006.01); B29K 105/04 (2006.01)
CPC C08J 9/18 (2013.01) [C08J 3/226 (2013.01); C08J 9/0004 (2013.01); C08J 9/122 (2013.01); C08J 9/228 (2013.01); C08K 3/38 (2013.01); B29C 44/44 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29K 2105/048 (2013.01); C08J 2203/06 (2013.01); C08J 2203/22 (2013.01); C08J 2323/14 (2013.01); C08K 2003/387 (2013.01)] 10 Claims
OG exemplary drawing
 
1. Polyolefin-based resin expanded beads obtained by expanding polyolefin-based resin particles including one or two or more metal borates selected from zinc borate and magnesium borate,
wherein the particles of the metal borate has an arithmetic average particle diameter based on the number of particles of 1 μm or more, and a number rate of the particles of the metal borate having a particle diameter of 5 μm or more is 20% or less, and
wherein a content of the metal borate in the expanded beads is 50 ppm by mass or more and 5000 ppm by mass or less.