Microneedle and method for producing same
AssigneeCosmed Pharmaceutical Co., Ltd.
InventorsYing-shu Quan, Ying-zhe Li, Mio Saito, Shouta Kitaoka, Fumio Kamiyama
Life of this patent
Estimating the term…
Abstract
Provided are a microneedle with excellent performance and a method for manufacturing the microneedle. A microneedle array in which a polyglycolic acid is used as a material, crystallinity of the polyglycolic acid is 21% or more and axial contraction rate of tips is 99% or more, and a manufacturing method in which a polyglycolic acid are injection-molded at a cylinder temperature of 230-280° C., a metal mold temperature of 60-130° C., and an injection pressure of 1000-1500 KPa so as to manufacture a microneedle array in which crystallinity of the polyglycolic acid is 21% or more and an axial contraction rate of tips is 99% or more.
Claims10
A microneedle array, wherein:
- polyglycolic acid is used as a material;
- crystallinity of the polyglycolic acid is 21% or more;
- and
- an axial contraction rate of tips is 99% or more.
A manufacturing method of a microneedle array, wherein
- polyglycolic acid is injection-molded at a cylinder temperature of 230-280° C., a metal mold temperature of 60-130° C., and an injection pressure of 1000-1500 KPa, so as to manufacture the microneedle array in which crystallinity of the polyglycolic acid is 21% or more, and an axial contraction rate of tips is 99% or more.
A percutaneous absorption preparation, wherein
- a drug is held on a range of 500 μm from tips of a microneedle array
- in which polyglycolic acid, whose crystallinity is 21% or more and an axial contraction rate of tips is 99% or more, is used as a material.
Dependencies are inferred from the claim text.