Method for manufacturing laminate, and laminate

Patent metadata

Field	Value
Publication number	US-10137665-B2
Application number	US-201615394211-A
Country	US
Kind code	B2
Filing date	Dec 29, 2016
Priority date	Jan 14, 2016
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

After bringing a water-containing peeling liquid in contact with a thin flat film formed on a substrate, a support film including a cover film having one main surface thereof is laminated onto the flat film, such that the support film is in contact with the flat film, a cover film-attached laminate composed of a support film and a cover film is then separated from the substrate, and the laminate including the flat film and the support film is separated from the cover film-attached film.

First claim

What is claimed is:

1. A laminate comprising a flat film and a support film, wherein:
the flat film has a thickness of 1000 nm or less, and does not have through-pores with an opening diameter of 1 nm or more;
the support film is a porous film having a surface roughness of 100 nm or less;
a plurality of openings in the main surface of the support film have an average diameter below 1000 nm; and
the main surface of the support film has an opening ratio of 40 area % or less.

2. The laminate according to claim 1 , wherein the support film has continuous pores that are spherical or substantially spherical and are in communication with each other.

3. The laminate according to claim 2 , wherein the pores have an average diameter below 1000 nm.

4. The laminate according to claim 1 , wherein a rate of dissolution of the flat film in water and a rate of dissolution of the support film in water are each 1 nm/sec or less.

5. The laminate according to claim 1 , wherein the support film has an air permeability of 10 to 300 sec/100 cc.

6. The laminate according to claim 1 , wherein the flat film has a tensile strength of 1 to 5 GPa.

7. The laminate according to claim 1 , wherein the support film further comprises one or more resins selected from the group consisting of polyimides, polyamide-imides, polyether sulfones and polyvinylidene fluorides.

8. A gas filter comprising the laminate according to claim 1 as a separation membrane.

9. A separation method using the filter according to claim 8 , the method comprising:
separating a gas from a mixture including a solid and the gas;
separating a gas from a mixture including a liquid and the gas; or
separating at least one gas from a mixed gas including two or more gases.

Assignees

• Tokyo Ohka Kogyo Co Ltd

Inventors

• Noguchi Takuya
• Senzaki Takahiro
• Ogata Toshiyuki

Classifications

• B32B27/286

  comprising polysulphones; polysulfides · CPC title

• B01D69/12

  Composite membranes; Ultra-thin membranes · CPC title

• B01D67/0009

  by phase separation, sol-gel transition, evaporation or solvent quenching · CPC title

• B32B2250/02

  2 layers · CPC title

• B32B2307/724

  Permeability to gases, adsorption · CPC title