Fiber article

Patent metadata

Field	Value
Publication number	US-12104300-B2
Application number	US-202017637599-A
Country	US
Kind code	B2
Filing date	Aug 28, 2020
Priority date	Aug 30, 2019
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A fiber article includes a plurality of first fibers and a plurality of second fibers each having an outer diameter smaller than that of each of the first fibers, the plurality of second fibers being supported in a dispersed state by the first fibers. A ratio D1/D2 of an outer diameter D1 of the first fiber to an outer diameter D2 of the second fiber is set to a value in a range of 15.0 or greater to 1666.7 or less. The outer diameter D1 is set to a value in a range of 5.0 μm or greater to 50.0 μm or less, and the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 1.0 μm or less.

First claim

The invention claimed is:

1. A fiber article, comprising:
a plurality of first fibers; and
a plurality of second fibers each having an outer diameter smaller than that of each of the first fibers, the second fibers being supported in a dispersed state by the first fibers,
wherein the first fibers consist of one of rayon, polypropylene, polyethylene terephthalate, polyethylene, or cellulose acetate, and the second fibers include at least one of polytetrafluoroethylene, polypropylene, polyethylene, or polyamide, where the first fibers consist of a material different from that of the second fibers,
a ratio D1/D2 of an outer diameter D1 of the first fiber to an outer diameter D2 of the second fiber is set to a value in a range of 15.0 or greater to 1666.7 or less,
the outer diameter D1 is set to a value in a range of 14.64 μm or greater to 50.0 μm or less, and
the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 800 nm or less.

2. The fiber article according to claim 1 , wherein the outer diameter D1 is set to a value in a range of 20.0 μm or greater to 30.0 μm or less.

3. The fiber article according to claim 1 , wherein the first fibers are crimped.

4. The fiber article according to claim 1 , wherein gaps between the plurality of first fibers and gaps between the plurality of second fibers are formed inside the fiber article in a state where the second fibers are attached to the first fibers.

5. The fiber article according to claim 1 , being formed into a sheet shape having a thickness dimension of 3.0 mm or greater.

6. A fiber article comprising:
a plurality of first fibers;
a plurality of second fibers each having an outer diameter smaller than that of each of the first fibers, the second fibers being supported in a dispersed state by the first fibers; and
resin particles attached to the first fibers and made of a composition similar to that of the second fibers,
wherein the second fibers include at least one of polytetrafluoroethylene, polypropylene, polyethylene, or polyamide,
the first fibers include a material different from that of the second fibers,
a ratio D1/D2 of an outer diameter D1 of the first fiber to an outer diameter D2 of the second fiber is set to a value in a range of 15.0 or greater to 1666.7 or less,
the outer diameter D1 is set to a value in a range of 14.64 μm or greater to 50.0 μm or less,
the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 800 nm or less, and
a ratio V1/V2 of a total volume V1 of the first fibers and a total volume V2 of the second fibers and the resin particles is set to a value in a range of 1.9 or greater to 124.0 or less.

7. The fiber article according to claim 1 , wherein a pressure loss when air is passed through the fiber article at a flow rate of 5.3 cm/sec. is set to a value in a range of 3 Pa or greater to 35 Pa or less.

8. The fiber article according to claim 1 , wherein the second fibers are made of a polymer that can be fiberized.

9. The fiber article according to claim 1 , wherein a water contact angle is a value in a range of 10° or greater to 40° or less.

10. A fiber article comprising:
a plurality of first fibers; and
a plurality of second fibers each having an outer diameter smaller than that of each of the first fibers, the second fibers being supported in a dispersed state by the first fibers,
wherein the second fibers mainly include polytetrafluoroethylene,
the first fibers include a material different from that of the second fibers,
a ratio D1/D2 of an outer diameter D1 of the first fiber to an outer diameter D2 of the second fiber is set to a value in a range of 15.0 or greater to 1666.7 or less,
the outer diameter D1 is set to a value in a range of 14.64 μm or greater to 50.0 μm or less, and
the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 800 nm or less.

Assignees

• Daicel Corp
• Daikin Ind Ltd

Inventors

• Ito Yoshitaka
• Omura Masaya
• Makino Junko
• Hara Satoshi
• Shintani Hiroaki

Classifications

• D10B2505/04

  Filters · CPC title

• D04H1/4318

  Fluorine series · CPC title

• B01D2239/1291

  Other parameters · CPC title

• B01D2239/1233

  Fibre diameter · CPC title

• B01D2239/0645

  Arrangement of the particles in the filtering material · CPC title