Elastomer molded body for medical device, method of manufacturing of elastomer molded body for medical device, and medical device

Patent metadata

Field	Value
Publication number	US-11452799-B2
Application number	US-201916726736-A
Country	US
Kind code	B2
Filing date	Dec 24, 2019
Priority date	Jul 7, 2017
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

An elastomer molded body for a medical device includes an elastomer portion and a filler. The elastomer portion contains a crosslinked fluorine-based elastomer. The filler is formed from a plurality of particles each of which has aspect ratio of 5 or more and specific surface area of 3 m2/g or more and 10 m2/g or less. The aspect ratio is defined as a ratio of a dimension in a long axis direction thereof to a dimension in a short axis direction thereof. The filler has an uneven distribution in a surface layer part of the elastomer portion and is oriented in a direction along a surface of the elastomer molded body.

First claim

What is claimed is:

1. An elastomer molded body for a medical device, comprising:
an elastomer portion containing a crosslinked fluorine-based elastomer; and
a filler formed from a plurality of particles, each of the plurality of particles having an aspect ratio of 5 or more and specific surface area of 3 m 2 /g or more and 10 m 2 /g or less, the aspect ratio being defined as a ratio of a dimension in a long axis direction thereof to a dimension in a short axis direction thereof, the filler having an uneven distribution in a surface layer part of the elastomer portion and oriented a direction along a surface of the elastomer molded body.

2. The elastomer molded body for a medical device according to claim 1 ,
wherein the plurality of particles contain alumina.

3. The elastomer molded body for a medical device according to claim 2 ,
wherein 0.2 parts by mass or more and 1 part by mass or less of the filler is contained with respect to 100 paints by mass of the crosslinked fluorine-based elastomer.

4. The elastomer molded body for a medical device according to claim 1 ,
wherein the crosslinked fluorine-based elastomer contains a tertiary copolymer including vinylidene fluoride as a monomer.

5. The elastomer molded body for a medical device according to claim 1 ,
wherein the elastomer portion further includes a liquid fluorine-based elastomer that is not crosslinked with the crosslinked fluorine-based elastomer.

6. The elastomer molded body for a medical device according to claim 5 ,
wherein 10 parts by mass or more and 50 parts by mass of the liquid fluorine-based elastomer is contained with respect to 100 parts by mass of the crosslinked fluorine-based elastomer.

7. The elastomer molded body for a medical device according to claim 1 , further comprising
greater than 0 parts by mass and 10 parts by mass or less of a crosslinking aid with respect to 100 parts by mass of the crosslinked fluorine-based elastomer.

8. The elastomer molded body for a medical device according to claim 7 ,
wherein the crosslinking aid contains triallyl isocyanurate.

9. The elastomer molded body for a medical device according to claim 1 , further comprising
greater than 0 parts by mass and 50 parts by mass or less of a reinforcing agent with respect to 100 parts by mass of the crosslinked fluorine-based elastomer.

10. The elastomer molded body for a medical device according to claim 9 ,
wherein the reinforcing agent contains thermal black.

11. A medical device comprising the elastomer molded body for a medical device according to claim 1 .

12. A method of manufacturing of the elastomer molded body for a medical device according to claim 1 , the method comprising:
kneading a molding material containing an uncrosslinked fluorine-based elastomer and the plurality of particles having the aspect ratio of 5 or more and the specific surface area of 3 m 2 /g or more and 10 m 2 /g or less to form a kneaded material having a Mooney viscosity ML 1-10 (100° C.) of 30 M or more and 40 M or less; and
injecting the kneaded material into a molding space of a mold at a flow rate of 30 mm/min or more and 150 mm/min or less to mold the kneaded material.

Assignees

• Olympus Corp

Inventors

• Maeda Issei

Classifications

• B29L2031/753

  Medical equipment; Accessories therefor (bloodbags, medical bags B29L2031/7148; artificial eyes B29L2011/0008) · CPC title

• B29K2021/006

  Thermosetting elastomers · CPC title

• B29C70/62

  the filler being oriented during moulding (for short fibres B29C70/14) · CPC title

• A61B1/0011

  Manufacturing of endoscope parts · CPC title

• B29B7/90 Primary

  Fillers or reinforcements {, e.g. fibres} · CPC title