Method for producing glass plate

一种制造方法、玻璃的技术，应用在玻璃生产等方向，能够解决平坦性受损等问题，达到优异平面度、降低翘曲、省略研磨处理的效果

Active Publication Date: 2016-05-11
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It has been reported that float glass is warped after chemical strengthening and flatness is impaired (Patent Documents 1 to 3)

Method used

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  • Method for producing glass plate
  • Method for producing glass plate
  • Method for producing glass plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0216] In the float kiln with the glass ribbon of glass material A flowing, HF treatment was implemented under the treatment temperature and viscosity shown in Table 1 (the total contact amount of HF was 1.28×10 －4 Mole / cm 2 ). The obtained glass with a plate thickness of 0.7 mm was cut into 100 mm squares, the warpage of two diagonal lines of the portion corresponding to the 90 mm square of the substrate was measured, and the average value thereof was defined as the warpage amount before strengthening.

[0217] Afterwards, in KNO heated to 450°C 3 The glass was chemically strengthened by immersing it in molten salt for 2 hours. Next, the warpage of two diagonal lines in a portion corresponding to a 90 mm square portion of the substrate was measured, and the average value thereof was regarded as the warpage amount after strengthening to calculate the warpage displacement amount.

[0218] The results are shown in Table 1. In addition, the comparative example 1 is a referenc...

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Abstract

A method for producing a float glass comprises the steps of: melting a glass raw material; molding the molten glass into a glass ribbon while floating the molten glass on a molten metal; and slowly cooling the glass ribbon. In the step of molding, a gas or liquid containing a fluorine atom-containing molecule is blown onto the glass ribbon that has a viscosity of 1.0*104 to 2.5*1010 Pas.

Description

technical field [0001] The present invention relates to a method of manufacturing glass sheets. Background technique [0002] In recent years, in flat-panel display devices such as mobile phones or portable information terminals (PDAs), personal computers, televisions, and car navigation display devices, in order to protect the display and improve the appearance, a thin plate-shaped protective glass is arranged on the front of the display. to reach a wider area than the image display portion. [0003] For such flat panel display devices, weight reduction and thinning are required, and therefore, a cover glass for display protection is also required to be thinned. [0004] However, when the thickness of the cover glass is reduced, the strength is lowered, and the cover glass itself may be broken due to being dropped during use or carrying, so that the original function of protecting the display device cannot be exhibited. [0005] Therefore, in the conventional cover glass,...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C03B18/20C03C21/00C03C23/00
CPCC03C21/002C03B18/02C03B25/093C03C3/087C03C15/00C03C21/007Y02P40/57
Inventor白井正信加藤亮祐宫坂聪史井川信彰
OwnerAGC INC