Titanum filter for syringes and its manufacturing method
AssigneeHanatech Co., Ltd.
InventorsChang Hwan BAE, Gun Suk IN, Hong Jin KIM, Kwon Ung HWANG
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Abstract
Provided is a titanium filter for syringes and its manufacturing method, more particularly, a titanium filter for syringes which has an improved filtering power and high safety and its manufacturing method. The titanium filter for syringes comprises: a first body having a hollow hole formed on the inner side thereof; and a second body configured to extend in the longitudinal direction of the first body and to cover one side of the hollow hole, wherein the first body and the second body are composed of titanium powders.
Claims9
A titanium filter for syringes, comprising:
- a first body having a hollow hole formed on the inner side thereof;
- and
- a second body configured to extend in the longitudinal direction of the first body and to cover one side of the hollow hole,
- wherein the first body and the second body are composed of titanium powders,
- wherein the titanium powders have a composition ratio of irregular square powders:spherical powders of 70 to 90%:10 to 30%,
- wherein the titanium powders are a mixture of 37 to 67% of square powders with a particle size of 75 μm to 150 μm, 14 to 44% of square powders with a particle size of 0 μm to 75 μm, and 10 to 30% of spherical powders with a particle size of 0 μm to 75 μm,
- wherein the spherical powders improve fluidity and facilitates obtaining pores, and the mixture of square powders with a particle size of 75 μm to 150 μm and square powders with a particle size of 0 μm to 75 μm improves Green strength and further improve fluidity of powders, and
- wherein the titanium filter is subjected to vacuum heat treatment so that it has a density of 2.5 g/cm3 of 4.0 g/cm3 so as to filter at least 90% of the foreign substances contained in a liquid medicine within 4 to 25 seconds.
A manufacturing method of a titanium filter for syringes, comprising the steps of:
- a) mixing titanium powders and a molding lubricant to form a mixture;
- b) charging the mixture into a mold and applying a molding pressure to form a molded body;
- c) degreasing the molded body, which has been formed, under vacuum in a vacuum furnace;
- and
- d) sintering the product, which has been degreased under vacuum, to form a titanium filter,
- wherein, in step a),
- the titanium powders have a composition ratio of irregular square powders:spherical powders of 70 to 90%:10 to 30%,
- the titanium powders are a mixture of 37 to 67% of square powders with a particle size of 75 μm to 150 μm, 14 to 44% of square powders with a particle size of 0 μm to 75 μm, and 10 to 30% of spherical powders with a particle size of 0 μm to 75 μm, and
- the spherical powders improve fluidity and facilitates obtaining pores, and the mixture of square powders with a particle size of 75 μm to 150 μm and square powders with a particle size of 0 μm to 75 μm improves Green strength and further improve fluidity of powders, and
- wherein, in step d),
- the titanium filter is subjected to vacuum heat treatment so that it has a density of 2.5 g/cm3 of 4.0 g/cm3 so as to filter at least 90% of the foreign substances contained in a liquid medicine within 4 to 25 seconds.
Dependencies are inferred from the claim text.