Please download the dossier by clicking on the dossier button x
×

METHOD OF PRODUCING TRANSDERMAL ABSORPTION SHEET

  • US 20180029258A1
  • Filed: 07/07/2017
  • Published: 02/01/2018
  • Est. Priority Date: 07/27/2016
  • Status: Active Grant
First Claim
Patent Images

1. A method of producing a transdermal absorption sheet comprising:

  • an apparatus preparing step of preparing a mold having needle-like recessed portions and having an angle of 120°

    or more and 160°

    or less inside the mold, the angle being formed between a flat portion of a surface and an inlet portion of the needle-like recessed portion, and a liquid feeding apparatus including a slit-shaped opening portion formed at a nozzle tip end portion and a lip land portion;

    a filling step of filling the needle-like recessed portions with a solution by feeding the solution to the mold from the liquid feeding apparatus and moving the liquid feeding apparatus while, when a travelling direction of the liquid feeding apparatus is set to a primary side and a direction opposite to the travelling direction is set to a secondary side, bringing at least a rear end of the lip land portion on the secondary side into contact with the mold; and

    a sheet portion forming step of forming needle portions and a sheet portion using a polymer solution,wherein in the filling step, when the rear end of the lip land portion on the secondary side of the liquid feeding apparatus matches with a secondary side inlet of the needle-like recessed portion, the shortest length of a distance from a primary side inlet of the needle-like recessed portion to the lip land portion on the secondary side or a wall surface of a secondary side block of the opening portion of the liquid feeding apparatus is 220 μ

    m or less.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×