公开(公告)号：US20220290332A1

公开(公告)日：2022-09-15

申请号：US17636691

申请日：2020-08-20

Applicant: Toray Industries, Inc.

Inventor： Kenichi Harimoto ,  Kanta Tanabe ,  Hirokazu Sakaguchi

IPC: D01F6/62 ,  C08L63/08 ,  C08L101/16 ,  D01F6/92 ,  D04H1/728 ,  D04H3/011

Abstract: A fiber structure includes a biodegradable polymer fiber, the fiber structure having two or more peaks in a molecular weight distribution obtained by GPC measurement of the biodegradable polymer, and the fiber structure having one or more peaks in each of a region of 100,000 or less of molecular weight and a region of more than 100,000 of molecular weight in the molecular weight distribution obtained by GPC measurement of the biodegradable polymer.

公开(公告)号：US12202969B2

公开(公告)日：2025-01-21

申请号：US17612068

申请日：2020-05-26

Applicant: Toray Industries, Inc.

Inventor： Kenichi Harimoto ,  Kanta Tanabe ,  Kazuhiro Tanahashi ,  Hirokazu Sakaguchi

IPC: C08L67/04 ,  A61L27/26 ,  A61L27/58 ,  C08G63/08 ,  C08G63/78

Abstract: A polymer composition contains polylactic acid and a dilactide/ε-caprolactone copolymer, in which a content of the polylactic acid relative to a total of 100 mass % of the polylactic acid and the dilactide/ε-caprolactone copolymer is 20 to 40 mass %, and in which the dilactide/ε-caprolactone copolymer satisfies (1) an R value represented by a following formula is 0.45 or more and 0.99 or less: R = [ AB ] ⁢ / ⁢ ( 2 ⁡ [ A ] ⁡ [ B ] ) × 100 where [A] is a molar fraction (%) of a dilactide residue in the dilactide/ε-caprolactone copolymer, [B] is a molar fraction (%) of an ε-caprolactone residue in the dilactide/ε-caprolactone copolymer, and [AB] is a molar fraction (%) of a structure in which a dilactide residue and an ε-caprolactone residue are adjacent to each other (A-B and B-A) in the dilactide/ε-caprolactone copolymer, and (2) at least one of the dilactide residue and the ε-caprolactone residue has a degree of crystallization of less than 14%.

公开(公告)号：US20220251372A1

公开(公告)日：2022-08-11

申请号：US17612068

申请日：2020-05-26

Applicant: Toray Industries, Inc.

Inventor： Kenichi Harimoto ,  Kanta Tanabe ,  Kazuhiro Tanahashi ,  Hirokazu Sakaguchi

IPC: C08L67/04 ,  A61L27/26

Abstract: A polymer composition contains polylactic acid and a dilactide/ε-caprolactone copolymer, in which a content of the polylactic acid relative to a total of 100 mass % of the polylactic acid and the dilactide/ε-caprolactone copolymer is 20 to 40 mass %, and in which the dilactide/ε-caprolactone copolymer satisfies (1) an R value represented by a following formula is 0.45 or more and 0.99 or less: R = [ AB ] ⁢ / ⁢ ( 2 ⁡ [ A ] ⁡ [ B ] ) × 100 where [A] is a molar fraction (%) of a dilactide residue in the dilactide/ε-caprolactone copolymer, [B] is a molar fraction (%) of an ε-caprolactone residue in the dilactide/ε-caprolactone copolymer, and [AB] is a molar fraction (%) of a structure in which a dilactide residue and an ε-caprolactone residue are adjacent to each other (A-B and B-A) in the dilactide/ε-caprolactone copolymer, and (2) at least one of the dilactide residue and the ε-caprolactone residue has a degree of crystallization of less than 14%.