Filter and container having microbicidal activity

Patent metadata

Field	Value
Publication number	US-2016121005-A1
Application number	US-201514897252-A
Country	US
Kind code	A1
Filing date	Mar 12, 2015
Priority date	Apr 28, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

A sterilization filter includes a synthetic polymer film, the synthetic polymer film having a surface which has a plurality of first raised portions, a two-dimensional size of the plurality of first raised portions being more than 20 nm and less than 500 μm when viewed in a normal direction. The synthetic polymer film is arranged in a predetermined shape. In the arrangement of the predetermined shape, an inclination of a normal to the surface varies depending on a position over the surface, and an inclination of a normal to a surface opposite to the surface varies depending on a position over the opposite surface. At least part of the surface is capable of coming into contact with a gas or liquid.

First claim

1 . A sterilization filter comprising a synthetic polymer film, the synthetic polymer film having a surface which has a plurality of first raised portions, a two-dimensional size of the plurality of first raised portions being more than 20 nm and less than 500 μm when viewed in a normal direction,
wherein the synthetic polymer film is arranged in a predetermined shape,
in the arrangement of the predetermined shape, an inclination of a normal to the surface varies depending on a position over the surface, and an inclination of a normal to a surface opposite to the surface varies depending on a position over the opposite surface, and
at least part of the surface is capable of coming into contact with a gas or liquid.

2 . The sterilization filter of claim 1 wherein, in the arrangement of the predetermined shape, a cross section of the synthetic polymer film forms at least one ring.

3 . The sterilization filter of claim 1 wherein, in the arrangement of the predetermined shape, a cross section of the synthetic polymer film forms a spiral.

4 . The sterilization filter of claim 1 , wherein the predetermined shape is a bellows-like shape.

5 . The sterilization filter of claim 1 , wherein the surface further has a plurality of spacer portions.

6 . The sterilization filter of claim 5 , wherein a height of the plurality of spacer portions is not less than 1 μm.

7 . The sterilization filter of claim 5 , wherein the plurality of spacer portions have a pillar-like shape.

8 . The sterilization filter of claim 1 , further comprising a spacer,
wherein the spacer is arranged so as to form a space above the surface of the synthetic polymer film.

9 . The sterilization filter of claim 8 , wherein the spacer is in the form of a thread.

10 . The sterilization filter of claim 1 , further comprising at least one electrode which is in contact with the synthetic polymer film.

11 . The sterilization filter of claim 1 , wherein at least part of the surface of the synthetic polymer film is positively charged.

12 . The sterilization filter of claim 1 , wherein at least part of a surface opposite to the surface of the synthetic polymer film is negatively charged.

13 . The sterilization filter of claim 1 , wherein
the predetermined shape is a cylindrical shape, the synthetic polymer film demarcates a cylinder, and a plurality of synthetic polymer film pieces are provided in the cylinder, each of the plurality of synthetic polymer film pieces having a surface which has the plurality of first raised portions.

14 . The sterilization filter of claim 13 , wherein a sum of an area per 1 cm 3 of an inner volume of the cylinder of the surface of the synthetic polymer film and an area per 1 cm 3 of an inner volume of the cylinder of the surfaces of the plurality of synthetic polymer film pieces is not less than 4.4 cm 2 .

15 . The sterilization filter of claim 1 , wherein
the synthetic polymer film further has a plurality of second raised portions superimposedly formed over the plurality of first raised portions, and a two-dimensional size of the plurality of second raised portions is smaller than the two-dimensional size of the plurality of first raised portions and does not exceed 100 nm.

16 . A container comprising a synthetic polymer film on an inner wall or a bottom surface, the synthetic polymer film having a plurality of first raised portions over its surface, a two-dimensional size of the plurality of first raised portions being more than 20 nm and less than 500 nm when viewed in a normal direction.

Assignees

• Sharp Kk

Inventors

• Nakahara Takahiro
• Yamada Miho
• Minoura Kiyoshi
• Takami Seiji

Classifications

• B01D2323/48

  Influencing the pH · CPC title

• B01D29/31

  Self-supporting filtering elements · CPC title

• A61L2209/14

  Filtering means · CPC title

• B01D46/0028

  provided with antibacterial or antifungal means · CPC title

• B01D2279/65

  for the sterilisation of air · CPC title