Method for manufacturing water-absorbent carrier

Patent metadata

Field	Value
Publication number	US-10258702-B2
Application number	US-201615082671-A
Country	US
Kind code	B2
Filing date	Mar 28, 2016
Priority date	Sep 30, 2013
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A water-absorbent carrier for moist heat sterilization can be used in a narrow space and does not have a risk of generating foreign matter. The water-absorbent carrier is obtained by embedding a water-absorbent substance in a synthetic resin. The water-absorbent carrier can be manufactured by impregnating the water-absorbent substance with a water-soluble substance, drying the water-absorbent substance, embedding the water-absorbent substance in a thermoplastic synthetic resin, and washing the water-absorbent substance to remove the water-soluble substance. Alternatively, the water-absorbent carrier can be manufactured by dispersing a water-insoluble synthetic resin in a dispersion medium, mixing the water-absorbent substance in the dispersion medium, pouring the mixture into a mold, and volatilizing the dispersion medium. A medical article to be sterilized includes the water-absorbent carrier packaged in a closed space. Moist heat sterilization (autoclave sterilization) of the medical article can be performed at a moist heat temperature exceeding 100° C.

First claim

The invention claimed is:

1. A method for manufacturing a water-absorbent carrier, comprising:
immersing a water-absorbent substance in an aqueous solution in which a water-soluble substance is dissolved to impregnate the water-absorbent substance with the water-soluble substance;
drying the water-absorbent substance impregnated with the water-soluble substance;
embedding the dried water-absorbent substance impregnated with the water-soluble substance in a thermoplastic synthetic resin to obtain a molded body; and
washing the molded body to remove the water-soluble substance.

2. The method for manufacturing a water-absorbent carrier according to claim 1 , wherein
the dried water-absorbent substance impregnated with the water-soluble substance is embedded in the thermoplastic synthetic resin in such a way that while the thermoplastic synthetic resin is heated and dissolved, the thermoplastic synthetic resin is mixed with the water-absorbent substance, and then cooled.

Assignees

• Terumo Corp

Inventors

• Watanabe Eiji
• Abe Yoshihiko

Classifications

• B01J20/327

  Polymers obtained by reactions involving only carbon to carbon unsaturated bonds · CPC title

• B01J20/3293

  Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers · CPC title

• B01J20/18

  Synthetic zeolitic molecular sieves · CPC title

• B01J20/262

  obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation (macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds per se C08G) · CPC title

• B01J20/305

  Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores · CPC title