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Title:
MANUFACTURE OF HYDROPHILIC HIGH-MOLECULAR FILM PRODUCT
Document Type and Number:
Japanese Patent JPS62142618
Kind Code:
A
Abstract:

PURPOSE: To mold a baggy high molecular material product by a wet system, by a method wherein the inside of a wall made of a semipermeable material has been kept impregnated with a coagulating agent, an aqueous suspension of a hydrophilic high-molecular material is brought into contact with the surface of the wall and film manufacturing is performed by coagulating the high-molecular material along the surface of the wall.

CONSTITUTION: The inside of a wall of a mold composed of a semipermeable material is impregnated beforehand with a coagulating agent suitable for coagulation of a raw high- molecular material, then a stock solution is brought into contact with the surface of this wall, the high-molecular material in the stock solution is coagulated along the surface of the wall by diffusing the coagulating agent into the stock solution in the vicinity of the surface of the wall and a coat is formed and coagulated. The semipermeable material for a molding tool to be used for the titled manufacture is a porous and permeable one such as unglazed pottery or a glass filter which possesses a thickness and strength which are necessary for a molding tool. As a hydrophilic high-molecular material to be used for the titled manufacture, a natural high-molecular material such as casein or gelatin or collagen and a synthelic high-molecular material can be used. The high-molecular material can be used in the form of a water solution produced by dissolving the same into water, of an aqueous dispersion liquid produced by dispersing the same in water by mechanical pulverization, or of a mixture solution of both. As the coagulating agent to be used, organic substance having dehydrating action such as salt, mirabilite, or ammonium sulfate, or ionic surface-active agent such as an anionic active agent or cationic active agent is included.


Inventors:
HAYADE TAKESHI
IWAMOTO KUNIHARU
FUJIMOTO TOSHIO
Application Number:
JP28328185A
Publication Date:
June 26, 1987
Filing Date:
December 17, 1985
Export Citation:
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Assignee:
NIPPI INC
International Classes:
C07K14/78; B29C33/40; B29C41/02; C07K1/00; C07K14/76; C08J5/18; B29K1/00; B29K96/00; B29L31/48; (IPC1-7): B29C33/40; B29C41/02; C07K3/00; C07K15/20; C08J5/18
Attorney, Agent or Firm:
Kyozo Yuasa



 
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