A manufacturing method for manufacturing a biodegradable resin container includes at least: an injection molding process of injection molding a preform made of a biodegradable resin in an injection molding mold; a temperature adjustment process of adjusting a temperature of the preform in a temperature adjustment mold; and a blow molding process of manufacturing a container by blow molding the preform after temperature adjustment in a blow mold, in which a temperature of the injection molding mold is set to 40° C. or lower.

A medical stent mold includes a tube having an interior passage sized and dimensioned to receive a stent assembly disposed at least partially about a central portion of a stent balloon. The medical stent mold may also include a housing forming a chamber through which the tube extends. The tube may include a thermally conductive material and may have a body portion that extends within the chamber and an end portion that is proximate the body portion and that extends away from the housing. Forced convection may be used to quickly heat and cool the tube. Methods of increasing retention of an expandable stent assembly on a stent balloon and of detecting a leak in a stent balloon are also included.

This invention discloses a process for preparation of a balloon expandable biodegradable polymer stent with thin struts (strut thickness 130 m or less, preferably 100-110 m) with high fatigue and radial strength. The invention discloses a process for the preparation of a biodegradable polymer stent which involves deforming an extruded biodegradable polymer tube axially at a first predefined temperature by applying an axial force for a first predefined time interval. The process further includes radially expanding the axially stretched tube at a second predefined temperature by pressurizing the tube with an inert gas in one or more stages, the pressure applied in each successive stage being higher than the pressure applied in a previous stage.

This invention discloses a process for preparation of a balloon expandable biodegradable polymer stent with thin struts (strut thickness 130 m or less, preferably 100-110 m) with high fatigue and radial strength. The invention discloses a process for the preparation of a biodegradable polymer stent which involves radially deforming the biodegradable polymer tube by applying pressure to it with an inert gas at a predefined temperature in multiple stages with each successive stage having a pressure higher than the pressure applied in a previous stage. The process further involves maintaining the predefined temperature and pressure conditions of each stage for a specified time period after application of the pressure.

A medical stent mold includes a tube having an interior passage sized and dimensioned to receive a stent assembly disposed at least partially about a central portion of a stent balloon. The medical stent mold may also include a housing forming a chamber through which the tube extends. The tube may include a thermally conductive material and may have a body portion that extends within the chamber and an end portion that is proximate the body portion and that extends away from the housing. Forced convection may be used to quickly heat and cool the tube. Methods of increasing retention of an expandable stent assembly on a stent balloon and of detecting a leak in a stent balloon are also included.

A temperature adjustment mold for adjusting a temperature of an injection-molded bottomed preform made of resin includes: an air introduction member that is inserted into the preform and cools the preform by introducing compressed air from an air supply port into an interior of the preform; a cavity mold that accommodates the preform inside and performs heat exchange in contact with an outer peripheral surface of the preform into which the compressed air has been introduced; and a heating mechanism that heats a first portion of the cavity mold facing the air supply port more than a second portion of the cavity mold located on a downstream side of a flow path of the compressed air than the first portion.

A manufacturing method for manufacturing a biodegradable resin container includes at least: an injection molding process of injection molding a preform made of a biodegradable resin in an injection molding mold; a temperature adjustment process of adjusting a temperature of the preform in a temperature adjustment mold; and a blow molding process of manufacturing a container by blow molding the preform after temperature adjustment in a blow mold, in which a temperature of the injection molding mold is set to 40 C. or lower.