	US 12,433,970 B2
	Method for manufacturing medical device
Rumiko Kitagawa, Otsu (JP); and Masataka Nakamura, Otsu (JP)
Assigned to TORAY INDUSTRIES, INC., Tokyo (JP)
Appl. No. 17/620,197
Filed by TORAY INDUSTRIES, INC., Tokyo (JP)
PCT Filed Aug. 19, 2020, PCT No. PCT/JP2020/031219 § 371(c)(1), (2) Date Dec. 17, 2021, PCT Pub. No. WO2021/039519, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-154480 (JP), filed on Aug. 27, 2019.
Prior Publication US 2022/0249731 A1, Aug. 11, 2022
Int. Cl. B29D 11/00 (2006.01); A61L 15/24 (2006.01); A61L 29/08 (2006.01); A61L 29/12 (2006.01); A61L 29/14 (2006.01); A61L 31/10 (2006.01); A61L 31/12 (2006.01); A61L 31/14 (2006.01); G02C 7/04 (2006.01)

CPC A61L 15/24 (2013.01) [A61L 29/08 (2013.01); A61L 29/12 (2013.01); A61L 29/14 (2013.01); A61L 31/10 (2013.01); A61L 31/12 (2013.01); A61L 31/14 (2013.01); G02C 7/04 (2013.01)]

11 Claims

1. A method of manufacturing a medical device comprising a substrate and a hydrophilic polymer layer, comprising the steps of:

placing the substrate in a solution containing a hydrophilic polymer and a normal salt in an amount ranging from 3.0 to 20% by mass; and

heating the solution at a temperature ranging from 50° C. to 140° C.,

wherein the normal salt contains one or more selected from the group consisting of BaSO₄, BaCO₃, CaSO₄, CaCO₃, (CH₃COO)₂Ca, NaCl, Na₂CO₃, Na₂SO₄, NaNO₃, CH₃COONa, KCl, K₂SO₄, K₂CO₃, KNO₃, CH₃COOK, LiCl, LiSO₄, LiCO₃, LiNO₃, and CH₃COOLi, and

wherein the hydrophilic polymer comprises an amide group and an acidic group.