Medical device and method for manufacturing the same
AssigneeTerumo Kabushiki Kaisha
InventorTakeshi MATSUHASHI
Life of this patent
Estimating the term…
Abstract
A medical device with improved lubrication retaining property includes a base layer, and a lubricating layer having a first layer formed on at least a part of the base layer, and a second layer formed on at least a part of the first layer, in which the first layer includes a first copolymer having a structural unit derived from a hydrophilic monomer and a structural unit having an epoxy group, and has a swelling ratio of more than 70% and less than 1000%, and the second layer includes a second copolymer having a structural unit having an alkyl vinyl ether group and a structural unit having a carboxyl group or a salt or ester thereof.
Claims20
A medical device comprising:
- a base layer;
- two additional layers that together constitute a lubricating layer and that are successively applied to the base layer so that the two additional layers overlie the base layer, the two additional layers that are successively applied to the base layer comprising a first layer and a second layer, at least a part of the first layer being in contact with the base layer and being between the base layer and the second layer, and at least a part of the second layer being in contact with the first layer;
- the first layer comprising a first copolymer, the first copolymer comprising a structural unit derived from a hydrophilic monomer and a structural unit having an epoxy group, the first layer having a swelling ratio of at least 190% and less than 1000%;
- and
- the second layer comprising a second copolymer, the second copolymer comprising a structural unit having an alkyl vinyl ether group and a structural unit having a carboxyl group or a salt or ester thereof.
A medical device comprising:
- a base layer;
- a lubricating layer having a first layer formed on at least a part of the base layer and a second layer formed on at least part of the first layer;
- the first layer comprising a first copolymer, the first copolymer comprising a structural unit derived from a hydrophilic monomer and a structural unit having an epoxy group, the first layer having a swelling ratio of more than 70% and less than 1000%;
- and
- the second layer comprising a second copolymer, the second copolymer comprising a structural unit having an alkyl vinyl ether group and a structural unit having a carboxyl group or a salt or ester thereof.
A method for manufacturing a medical device, the method comprising:
- applying a first coating liquid comprising a first copolymer, the first polymer comprising a structural unit derived from a hydrophilic monomer and a structural unit having an epoxy group, and a solvent to at least a part of a base layer to form a first precursor layer on at least part of the base layer;
- applying a second coating liquid comprising a second copolymer, the second copolymer comprising a structural unit having an alkyl vinyl ether group and a structural unit having a carboxyl group or a salt or ester thereof, and a solvent to at least part of the first precursor layer to obtain an intermediate laminated body, in which a second precursor layer is formed on at least part of the first precursor layer;
- and
- irradiating the intermediate laminated body with an electron beam.
Dependencies are inferred from the claim text.