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Hydrophilic sheet and method of imparting ultrahigh hydrophilicity to substrate surface

A substrate surface, hydrophilic technology, applied in the direction of anti-pollution methods, chemical instruments and methods, cleaning methods and utensils, etc., can solve problems such as decreased vision, and achieve the effect of preventing fog

Inactive Publication Date: 2011-04-20
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, the mirrors used in road signs, display panels, and kitchen and bathroom facilities in the past have problems such as fogging due to the adhesion of water droplets, causing vision loss and other problems

Method used

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  • Hydrophilic sheet and method of imparting ultrahigh hydrophilicity to substrate surface
  • Hydrophilic sheet and method of imparting ultrahigh hydrophilicity to substrate surface
  • Hydrophilic sheet and method of imparting ultrahigh hydrophilicity to substrate surface

Examples

Experimental program
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Effect test

preparation example Construction

[0105] The (meth)acrylic polymer can be prepared, for example, using a mixture containing one or more monomer components, and can be carried out by an appropriate method such as a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, or a suspension polymerization method. .

[0106] In the preparation of the (meth)acrylic polymer, a polymerization initiator can be used. Examples of the polymerization initiator include peroxides such as hydrogen peroxide, benzoyl peroxide, and t-butyl peroxide.

[0107] Although the polymerization initiator is desirably used alone, it can also be used as a redox type polymerization initiator in combination with a reducing agent.

[0108] Examples of the reducing agent include ionized salts such as sulfites, bisulfites, iron salts, copper salts, and cobalt salts; amines such as triethanolamine; and reducing sugars such as aldose and ketose.

[0109] As a polymerization initiator, an azo compound is al...

Embodiment 1

[0147] (Oblique evaporation method)

[0148] Slanted columnar structures are formed using as Image 6 The coiled electron beam (EB) vacuum evaporation setup shown. A polyester film (manufactured by Toray, Lumirror S10) with a thickness of 50 μm was used as the substrate, and silicon dioxide (SiO 2 ), set the line speed to 0.2m / min, and the ultimate vacuum in the chamber is 4×10 -5 The tort and EB outputs were produced under the conditions of (emission current) 500mA and an incident angle of vapor deposition of 60 degrees.

[0149] (Production of hydrophilic sheet)

[0150] With respect to 100 parts of acrylic polymer obtained from a monomer mixture liquid composed of 100 parts of butyl acrylate and 3 parts of acrylic acid, 2 parts of polyisocyanate compound (manufactured by Nippon Polyurethane Industry, trade name: Coronate L), epoxy compound (manufactured by Mitsubishi Gas Chemical, trade name: Tetrad C) 0.6 parts were uniformly mixed to prepare an acrylic adhesive soluti...

Embodiment 2

[0154] Except that the line speed is set to 1.7m / min, the SiO of the evaporation source is made 2 Evaporate to form an inclined columnar structure on the substrate to make a hydrophilic sheet. The evaluation results are shown in Table 1. In addition, in Figure 8 The cross-sectional SEM photograph of the obtained hydrophilic sheet is shown in . In addition, in Figure 9 A photograph showing the evaluation of the anti-fogging property is shown in .

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PUM

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Abstract

Provided is a hydrophilic sheet which has high wettability by water and from which adherent fouling substances or adherent foreign substances can be easily removed by washing with water. The sheet can be prevented from fogging with waterdrop adhesion. Also provided is a method of imparting high wettability by water to a surface of any desired substrate. The hydrophilic sheet comprises a base and, formed thereon, a layer of oblique columnar structures gathered together and protruding at an angle of elevation from the surface smaller than 90 DEG , the surface of the layer having a water contact angle of 10 DEG or smaller. The method of imparting ultrahigh hydrophilicity to a surface of a substrate comprises forming, on the substrate surface by oblique vapor deposition, a layer of oblique columnar structures gathered together and protruding at an angle of elevation from the surface smaller than 90 DEG .

Description

technical field [0001] The present invention relates to a hydrophilic sheet with high wettability to water. Specifically, it relates to a hydrophilic sheet such as an antifouling sheet capable of easily removing adhering dirt or foreign matter by washing with water, or an antifogging sheet capable of preventing fog caused by adhesion of water droplets. [0002] In addition, the present invention relates to a method for superhydrophilizing the surface of a substrate. Specifically, it relates to a method of imparting high wettability to water to the surface of an arbitrary base material. According to the method of the present invention, dirt and foreign matter adhering to the surface of the substrate can be easily removed by washing with water, and fogging on the surface of the substrate caused by adhesion of water droplets can be prevented. [0003] The hydrophilic sheet of the present invention can be preferably obtained by using the method of superhydrophilizing the substra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/14B08B17/02C09K3/00
CPCC23C14/226Y02T50/67B08B17/06Y10T428/24612Y02T50/60
Inventor 寺田好夫
Owner NITTO DENKO CORP
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