Device having reduced friction properties

Inactive Publication Date: 2012-10-18
SCHOTT AG
View PDF14 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]The inventive coating ensures that the surface appears smooth, or respectively is smoothed, and that the coefficient of friction of the surface of the substrate is reduced.
[0014]If a surface is provided with a coating according to the present invention, then it is, for example, possible to move an input device on this surface without “scratching” or undesirable “sticking”, as is typically the case, for example, with a pen having a synthetic tip or a finger on normal glass surfaces. Moreover, the adherence of dirt or fingerprints on the surface is substantially reduced, so that dry cleaning of these contaminants on a surface with reduced adhesion is possible. This is especially advantageous with touch-panel applications.
[001

Problems solved by technology

Coated substrates, according to those described above often have the problem that the surfaces of these coatings are often very rough in spite of high contact angles.
This results in that glass panels, which for example find use in the field of displays, are scratched by ball pens or pens which leads to an unsteady character image a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device having reduced friction properties
  • Device having reduced friction properties
  • Device having reduced friction properties

Examples

Experimental program
Comparison scheme
Effect test

example 1

Sample 1

[0063]In the trial according to sample 1 the anti-reflection coating was produced according to the sol-gel method. The coating includes three individual layers respectively and possesses the following structure: Substrate+M+T+S.

[0064]The individual layer identified with T contains titanium dioxide (TiO2). The individual layer identified with S contains silicon dioxide (SiO2) and the individual layer identified with M is always drawn from S and T mixed solutions. The float glass substrate is carefully cleaned prior to coating. The dipping solutions are respectively applied in rooms which are air-conditioned to approximately 28° C. at a humidity of 5 to 10 grams per kilogram (g / kg), whereby the draw speeds for each individual layer M / T / S are approximately 275 / 330 / 228 millimeters per minute (mm / min). Drawing of each gel layer is followed by a curing process in air. The curing temperature and the curing time are approximately 180° C. / 20 min after production of the first gel laye...

example 2

Sample 2

[0067]The example-sample 2 is a one-sided anti-reflection coating which is applied as follows in the sputtering process: The coating is deposited in an inline unit in a mid-frequency (MF) sputtering process through magnetron sputtering, whereby the substrate is positioned on a so-called carrier and is transported on same through the sputtering unit. The application method is as follows:[0068]a) Inside the coating unit the substrate is first “heated to approximately 150° C. for dewatering of the surface”. Then an anti-reflection system (for example including four layers) is produced as follows:[0069]b) Sputtering of a high refractive substrate at a feed rate of approximately 1.7 meters per minute (m / min), whereby the carrier oscillates in front of the sputtering source and while the layer of 30 nm thickness is deposited. The production of the layer occurs through addition of argon and reactive gas, by regulating the reactive gas to plasma impedance. The process pressure is de...

example 3

Sample 3

[0076]A layer according to sample 1 is pre-cleaned in a washing machine and pre-treated with a neutralizer so that the coating is fat free. The thus cleaned surface is sprayed with the product ClearShield which is offered commercially for example by Fa. Bohle in Haan (Germany) and which represents a typical fluoro-polymer solution for ETC (Easy To Clean) applications. The surface sprayed with ClearShield is left to react at room temperature for approximately 10 to 15 minutes. The coated surface is then washed and dried. Through the coating with an ETC (easy to clean) ClearShield layer the contact angle can be substantially improved compared to untreated samples, as in sample 1 or 2. However, an increase of the contact angle by 23 or respectively 46 degrees in sample 1 or respectively sample 2 to 78 degrees in sample 3 does not mean that the respective coefficient of friction is achieved and that therefore a finger or pen can glide more easily over the surface or that a dry c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Login to view more

Abstract

A device, in particular a cover panel for a display device or a monitor auxiliary panel or a surface for input devices, includes a substrate and a coating applied onto the substrate. The coating has a surface having a coefficient of friction in the range between approximately 0.01 and 0.12, in particular between approximately 0.02 and 0.1, or between approximately 0.03 and 0.09.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation of PCT application No. PCT / EP2010 / 006397, entitled “DEVICE HAVING REDUCED FRICTION PROPERTIES”, filed Oct. 20, 2010, which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a device, in particular to a cover panel for a display device or a monitor front panel or a surface for inputs including a substrate and a coating applied onto the substrate, use of such a device, as well as a method to produce such a device.[0004]2. Description of the Related Art[0005]From DE 198 48 591 A1 an optical glass panel has become known which is provided with a fluoro-organic compound. According to DE 198 48 591 A1, through the coating with a fluoro-organic compound, glass panels, in particular wind shields, window panes or headlight lenses of vehicles are provided which distinguish themselves through high scratch resistance, reduced air friction, improve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B32B17/06B32B5/00B32B3/26B32B37/10B32B37/14B82Y30/00
CPCC03C17/3417C03C17/42C03C2217/425C03C2217/734C03C2217/76C03C2218/365Y10T428/265C23C18/1225C23C18/1254F21V3/04G02B1/115Y10T428/266C23C18/1216Y10T428/249953B05D5/08C03C17/34
Inventor KRZYAK, MARTAWALTHER, MARTENKRACHT, PETER
Owner SCHOTT AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products