Liquid repellent cloth, liquid repellent film, umbrella, and product

Patent metadata

Field	Value
Publication number	US-2021289899-A1
Application number	US-202017096704-A
Country	US
Kind code	A1
Filing date	Nov 12, 2020
Priority date	Mar 23, 2020
Publication date	Sep 23, 2021
Grant date	—

Abstract

A liquid repellent cloth or liquid repellent film according to an embodiment includes abase fabric selected from a fiber cloth or a synthetic resin film, and a liquid repellent membrane supported on at least one principal face of the base fabric. The liquid repellent membrane is a monomolecular membrane of a fluorine-containing organic compound that binds to a surface of the base fabric through a binding moiety represented by —Z—O—* (wherein Z represents an atomic group containing a Si atom, and * represents a binding site to the surface of the base fabric) and includes a perfluoroalkyl group having 4 or less carbon atoms at a terminal, and the fluorine-containing organic compound undergoes intermolecular bonding between the fluorine-containing organic compounds adjacent to each other by mutual binding of Z in the formula.

First claim

What is claimed is:

1 . A liquid repellent cloth or liquid repellent film comprising:
a base fabric selected from a fiber cloth or a synthetic resin film; and a liquid repellent membrane supported on at least one principal face of the base fabric, wherein the liquid repellent membrane is a monomolecular membrane of a fluorine-containing organic compound that binds to a surface of the base fabric through a binding moiety represented by —Z—O—* (wherein Z represents an atomic group comprising a Si atom, and * represents a binding site to the surface of the base fabric) and includes a perfluoroalkyl group having 4 or less carbon atoms at a terminal, and the fluorine-containing organic compound undergoes intermolecular bonding between the fluorine-containing organic compounds adjacent to each other by mutual binding of Z in the formula.

2 . The cloth or film according to claim 1 , wherein
Z in the formula is an atomic group comprising the Si atom and a C atom that binds to the O atom in the formula, and the intermolecular bond formed by mutual binding of the Z is a —C—Si—C—Si— chain or Z in the formula is an atomic group comprising an O atom and the Si atom that binds to the O atom in the formula, and the intermolecular bond formed by mutual binding of the Z is a —Si—O—Si—O— chain.

3 . The cloth or film according to claim 1 , wherein the perfluoroalkyl group binds to a residual moiety of the fluorine-containing organic compound through an ether bond.

4 . The cloth or film according to claim 1 , wherein the base fabric is a fiber cloth comprising a synthetic fiber, a semi-synthetic fiber, a regenerated fiber, and/or a natural fiber.

5 . The cloth or film according to claim 1 , wherein the base fabric is a synthetic resin film comprising a polyester-based film, a polyamide-based film, and/or a polyolefin-based film.

6 . The cloth or film according to claim 1 , wherein the base fabric is a synthetic resin film comprising an ethylene-vinyl alcohol copolymer resin (EVOH) or an ethylene-vinyl acetate copolymer resin (EVA).

7 . The cloth or film according to claim 1 , wherein the base fabric is a synthetic resin film having a thickness of from 50 μm to 200 μm.

8 . The cloth or film according to claim 1 , wherein the liquid repellent membrane is a film having a thickness of from 10 nm to 100 nm.

9 . The cloth or film according to claim 1 , wherein the base fabric has a surface that is modified to comprise hydroxy groups by ion plasma treatment.

10 . An umbrella, comprising the liquid repellent cloth or liquid repellent film according to claim 1 .

11 . A product, comprising the liquid repellent cloth or liquid repellent film according to claim 1 .

Assignees

• Toshiba Tec Kk

Inventors

• Seki Masashi

Classifications

• A45B25/18 Primary

  Covers (detachable A45B15/00); Means for fastening same · CPC title

• D06M15/657 Primary

  containing fluorine · CPC title

• D06M2200/10

  Repellency against liquids · CPC title

• D06M2200/12

  Hydrophobic properties · CPC title

• D06M10/08

  Organic compounds · CPC title