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float glass

A technology of float glass and glass, applied in the field of float glass, which can solve the problems of strength reduction and achieve the effect of improving surface strength

Active Publication Date: 2020-07-31
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For glass obtained by float forming, scratches are likely to occur on the surface due to contact with rolls during the manufacturing process. Therefore, compared with the top surface that does not contact molten metal, the bottom surface that is in contact with molten metal during float forming the strength of the

Method used

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Experimental program
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Effect test

Embodiment

[0219] Hereinafter, although an Example is given and this invention is demonstrated concretely, this invention is not limited to these.

[0220]

[0221] Various evaluations in this example were performed by the analysis methods shown below.

[0222] (Evaluation of Glass: Vertex Density (Sds))

[0223] The apex density (Sds) was determined according to the method described above (AFM measurement conditions and analysis procedure of image analysis software).

[0224] (evaluation of glass: quantity of removal)

[0225] The glass removal amount thickness was obtained by measuring the weight of the glass before and after the chemical treatment with an analytical electronic balance (HR-202i; manufactured by AND), and converting the thickness using the following formula.

[0226] (Removal thickness of each single side) = ((weight before treatment)-(weight after treatment)) / (glass specific gravity) / treatment area / 2

[0227] (evaluation of glass: surface strength)

[0228] The s...

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Abstract

The purpose of the present invention is to provide a float glass wherein reduction in the strength of a bottom surface is effectively suppressed. The present invention relates to a float glass that does not have polishing damage on the surface thereof, wherein the summit density (Sds) of a bottom surface that is in contact with a molten metal during float forming is 4700 or less.

Description

technical field [0001] This invention relates to float glass. Background technique [0002] In flat-panel display devices such as digital cameras, mobile phones, and portable information terminals PDA (Personal Digital Assistants, Personal Digital Assistants), in order to improve the protection and appearance of the display, the thin plate-shaped protective glass is used to make the area larger than the image display part. mode is configured on the front of the display. [0003] Along with the demand for weight reduction and thinning of flat panel display devices, the protective glass itself is also required to be thinner. Therefore, in order to satisfy this purpose, both the surface and the end surface of the cover glass are required to have higher strength. [0004] On the other hand, the float method is widely used as a manufacturing method of flat glass. For glass obtained by float forming, scratches are likely to occur on the surface due to contact with rolls during ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B18/02C03C15/02C03C21/00
CPCC03B18/02C03C15/02C03C21/00
Inventor 鹿岛出藤原祐辅玉井喜芳铃木祐一世良洋一山田拓小林大介
Owner AGC INC