Filter medium and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-9174152-B2
Application number	US-201314038756-A
Country	US
Kind code	B2
Filing date	Sep 27, 2013
Priority date	Jun 28, 2013
Publication date	Nov 3, 2015
Grant date	Nov 3, 2015

Abstract

Provided is a method of fabricating a filter medium including the following steps. An assembly of first fiber is formed by a first spinning device. A plurality of second fiber is formed by a second spinning device. On a reception device is collected a film having a three-dimensional non-woven structure constructed by the first fibers and the second fibers. Each of the first fibers has a diameter of 1-50 μm. Each of the second fibers has a diameter of 1-1000 nm. The second spinning device is positioned between the first spinning device and the reception device. The first fibers and the second fibers stack with each other in a random manner to form the three-dimensional non-woven structure.

First claim

What is claimed is:

1. A method of fabricating a filter medium, comprising:
forming a plurality of first fibers by a first spinning device;
forming a plurality of second fibers by a second spinning device;
collecting, on a reception device, a film having a three-dimensional non-woven structure constructed by the first fibers and the second fibers, wherein
each of the first fibers has a diameter of 1-50 μm; each of the second fibers has a diameter of 1-1000 nm; the second spinning device is located between the first spinning device and the reception device; the first fibers and the second fibers stack with each other in a random manner to form the three-dimensional non-woven structure; wherein the first spinning device is a melt-blowing apparatus and the second spinning device is an electro-spinning apparatus.

2. The method of claim 1 , wherein each of the first fibers is a continuous long fiber or a short fiber having a length greater than 3 mm.

3. The method of claim 1 , wherein each of the second fibers is a continuous long fiber.

4. The method of claim 1 , wherein the first fibers are drew by a hot air having a pressure of 10-20 psi during the formation of the first fibers by the melt-blowing apparatus.

5. The method of claim 1 , wherein the electro-spinning apparatus has a linear electrode connected to a high-voltage power supply, and is capable of producing continuous nano-fibers which then incorporates into a structure formed by the first fibers.

6. A filter medium, comprising:
a supporting layer constructed by a plurality of first fibers, wherein each of the first fibers has a diameter of 1-50 μm, and each of the first fibers is a continuous long fiber or a short fiber having a length greater than 3 mm; and
a plurality of second fibers dispersed in the supporting layer, wherein each of the second fibers has a diameter of 1-1000 nm, and the second fibers and the first fibers stack with each other in a random manner to form a three-dimensional composite structure combining a nano-structure and a micro-structure; wherein the first fibers are formed by a skill of melt-blowing, and the second fibers are formed by an electro-spinning process.

7. The filter medium of claim 6 , wherein each of the first fibers has a diameter of 1.0-50.0 μm, and each of the second fibers has a diameter greater than or equal to 1.0 nm and less than 1000.0 nm.

8. The filter medium of claim 6 , wherein a content of the second fibers is 0.1-50.0% based on a total weight of the first fibers and the second fibers.

9. The filter medium of claim 6 , wherein the supporting layer has a weight per unit area of 0.5-300.0 g/m 2 .

10. An air conditioning equipment comprising the filter medium of claim 6 .

Assignees

• Taiwan Textile Res Inst

Inventors

• Dai Chung-Feng
• Chien Huan-Sheng

Classifications

• Y10T442/615

  Strand or fiber material is blended with another chemically different microfiber in the same layer · CPC title

• B01D39/1623 Primary

  of synthetic origin · CPC title

• B01D2239/065

  More than one layer present in the filtering material · CPC title

• B01D2239/1233

  Fibre diameter · CPC title

• B01D2239/1225

  Fibre length · CPC title