Elastomer molded body for medical device, method of manufacturing of elastomer molded body for medical device, and medical device
AssigneeOlympus Corporation
InventorIssei MAEDA
Life of this patent
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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.
Claims12
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 m2/g or more and 10 m2/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.
A method of manufacturing of an elastomer molded body for a medical device, comprising:
- kneading a molding material containing an uncrosslinked fluorine-based elastomer and filler particles, the particles having an aspect ratio of 5 or more and specific surface area of 3 m21g or more and 10 m2/g or less to form a kneaded material having a Mooney viscosity ML1-10 (100° C.) of 30 M or more and 40 M 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;
- and
- injecting the kneaded material into 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.
Dependencies are inferred from the claim text.