Nonwoven fabric and test tool

Patent metadata

Field	Value
Publication number	US-2016258092-A1
Application number	US-201514938469-A
Country	US
Kind code	A1
Filing date	Nov 11, 2015
Priority date	Mar 6, 2015
Publication date	Sep 8, 2016
Grant date	—

Abstract

A nonwoven fabric includes a fiber including a first portion and a second portion connected to the first portion. A first fiber diameter of the first portion is smaller than a reference fiber diameter. A second fiber diameter of the second portion is equal to or greater than the reference fiber diameter. The reference fiber diameter is smaller than 1 μm. A ratio of a maximum fiber diameter of the second portion to a length of a linear line connecting both end portions of the second portion is from 1/10 to ⅓.

First claim

What is claimed is:

1 . A nonwoven fabric comprising:
a fiber including a first portion and a second portion connected to the first portion, wherein a first fiber diameter (D1) of the first portion is smaller than a reference fiber diameter (Dx), a second fiber diameter (D2) of the second portion is equal to or greater than the reference fiber diameter (Dx), the reference fiber diameter (Dx) is smaller than 1 μm, and a ratio (D2 max /L2) of a maximum fiber diameter (D2 max ) of the second portion to a length (L2) of a linear line (S2) connecting both end portions of the second portion is from 1/10 to ⅓.

2 . The nonwoven fabric according to claim 1 ,
wherein the maximum fiber diameter (D2 max ) is from 2 to 50 times the reference fiber diameter (Dx).

3 . The nonwoven fabric according to claim 1 ,
wherein the reference fiber diameter (Dx) is from 50 nm to 900 nm.

4 . The nonwoven fabric according to claim 1 ,
wherein the second portion has a spindle shape formed such that the second fiber diameter (D2) becomes smaller towards the both ends.

5 . The nonwoven fabric according to claim 4 ,
wherein a maximum acute angle (θ2) formed by the linear line (S2) and a tangent line of an outer periphery of the second portion is from 5 degrees to 45 degrees, when the nonwoven fabric is viewed from a normal direction of the nonwoven fabric.

6 . The nonwoven fabric according to claim 1 ,
wherein two or more second portions exist in a square region (R) having one side which is 100 times the reference fiber diameter (Dx), when the nonwoven fabric is viewed from a normal direction of the nonwoven fabric.

7 . The nonwoven fabric according to a claim 1 ,
wherein the second portion has a plurality of peak values of the second fiber diameter (D2).

8 . The nonwoven fabric according to claim 1 ,
wherein the fiber further includes a third portion, a third fiber diameter (D3) of the third portion is equal to or greater than the reference fiber diameter (Dx), a ratio (D3 max /L3) of a maximum fiber diameter (D3 max ) of the third portion to a length (L3) of a linear line (S3) connecting both end portions of the third portion is greater than ⅓, and the number of second portions included in a square region (R) having one side which is 100 times the reference fiber diameter (Dx) is greater than the number of third portions included in the square region (R), when the nonwoven fabric is viewed from a normal direction of the nonwoven fabric.

9 . The nonwoven fabric according to claim 1 , further comprising a fiber including the first portion and a third portion connected to the first portion,
wherein a third fiber diameter (D3) of the third portion is equal to or greater than the reference fiber diameter (Dx), a ratio (D3 max /L3) of a maximum fiber diameter (D3 max ) of the third portion to a length (L3) of a linear line (S3) connecting both end portions of the third portion is greater than ⅓, and the number of second portions included in a square region (R) having one side which is 100 times the reference fiber diameter (Dx) is greater than the number of third portions included in the square region (R), when the nonwoven fabric is viewed from a normal direction of the nonwoven fabric.

10 . A test tool which quantitatively or qualitatively detects a test substance in a test solution, the test tool comprising:
the nonwoven fabric according to claim 1 ; a base sheet which is bonded to one main surface of the nonwoven fabric; and a reagent which reacts with the test substance carried in the nonwoven fabric.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yoshioka Yuki
• Yamaguchi Takayoshi
• Kurokawa Takahiro

Classifications

• G01N33/54306

  Solid-phase reaction mechanisms · CPC title

• D04H3/018 Primary

  characterised by the shape · CPC title

• D04H1/43918

  nonlinear fibres, e.g. crimped or coiled fibres · CPC title

• D04H13/00 Primary

  Other non-woven fabrics · CPC title

• D04H1/728

  by electro-spinning {(electro-spinning methods and apparatus D01D5/0007)} · CPC title