Method and apparatus for producing dope and solution casting method
AssigneeFuji Photo Film Co., Ltd.
InventorHiromasa Tanaka
Life of this patent
Estimating the term…
Abstract
An additive is fed in a tube which is connected to a pipe for feeding a polymer solution, and a nozzle is provided in a front end of the tube. On a front end of the nozzle, a slit like slit is formed so as to extend in a diameter direction of the pipe. The front end is almost perpendicular to an upstream end of the nearest element of a static mixer. When the additive is added to the polymer solution through the slit, the additive is separated enough from a forward side of the static mixer, and the addition is made without rotation of the additive. Thus the mixing and stirring of the polymer solution and the additive is effectively made.
Claims10
A method of producing a dope comprising steps of:
- dissolving a polymer to a, solvent, so as to obtain a polymer solution;
- passing said polymer solution through a pipe;
- adding to said polymer solution an additive through a slit disposed in said pipe, said slit extending in a diameter direction of said pipe;
- and
- mixing and stirring a mixture of said polymer solution and said additive by an inline mixer, such that said dope may be obtained.
A solution casting method for producing a polymer film, comprising steps of:
- dissolving a polymer to a solvent, so as to obtain a polymer solution;
- passing said polymer solution through a pipe;
- adding to said polymer solution an additive through a slit disposed in said pipe, said slit extending in a diameter direction of said pipe;
- mixing and stirring a mixture of said polymer solution and said additive, such that a dope may be obtained;
- and
- casting said dope on a support, so as to form said polymer film.
An apparatus for producing a dope, comprising:
- a pipe for passing a polymer solution through which a polymer is dissolved to a solvent;
- an addition nozzle disposed in said pipe, for feeding an additive out to said polymer solution, a slit of said addition nozzle extending in a diameter direction of said pipe;
- and
- an inline mixer for mixing said polymer solution and said additive such that said dope may be obtained.
Dependencies are inferred from the claim text.