Title:
MICRONEEDLE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/151961
Kind Code:
A1
Abstract:
Provided are: a microneedle having excellent performance; and a method for producing the microneedle.
A microneedle array which is produced using polyglycolic acid as a material, wherein the degree of crystallinity of polyglycolic acid is 21% or more, and the rate of shrinkage of a tip part of the microneedle array is 99% or more as measured in the axis direction; and a method for producing a microneedle array in which the degree of crystallinity of polyglycolic acid is 21% or more and the rate of shrinkage of a tip part of the microneedle array is 99% or more as measured in the axis direction, said method comprising carrying out the ejection molding of polyglycolic acid at a cylinder temperature of 230 to 280ºC, a mold temperature of 60 to 130ºC and an ejection pressure of 1000 to 1500 KPa.
Inventors:
QUAN YING-SHU (JP)
LI YING-ZHE (JP)
SAITO MIO (JP)
KITAOKA SHOUTA (JP)
KAMIYAMA FUMIO (JP)
LI YING-ZHE (JP)
SAITO MIO (JP)
KITAOKA SHOUTA (JP)
KAMIYAMA FUMIO (JP)
Application Number:
PCT/JP2015/084690
Publication Date:
September 29, 2016
Filing Date:
December 10, 2015
Export Citation:
Assignee:
COSMED PHARMACEUTICAL CO LTD (JP)
International Classes:
A61M37/00
Domestic Patent References:
| WO2014126052A1 | 2014-08-21 |
Foreign References:
| JP2010247535A | 2010-11-04 | |||
| JP5050130B2 | 2012-10-17 | |||
| JP2014151122A | 2014-08-25 | |||
| US20140276589A1 | 2014-09-18 |
Other References:
See also references of EP 3275500A4
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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