JPH0660038B2 - Method for chemically strengthening polished glass - Google Patents
Method for chemically strengthening polished glassInfo
- Publication number
- JPH0660038B2 JPH0660038B2 JP61117547A JP11754786A JPH0660038B2 JP H0660038 B2 JPH0660038 B2 JP H0660038B2 JP 61117547 A JP61117547 A JP 61117547A JP 11754786 A JP11754786 A JP 11754786A JP H0660038 B2 JPH0660038 B2 JP H0660038B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- polished
- ions
- float
- float glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011521 glass Substances 0.000 title claims description 35
- 238000000034 method Methods 0.000 title claims description 19
- 238000005728 strengthening Methods 0.000 title claims description 5
- 239000005329 float glass Substances 0.000 claims description 29
- 150000003839 salts Chemical class 0.000 claims description 8
- 229910001416 lithium ion Inorganic materials 0.000 claims description 7
- 229910001415 sodium ion Inorganic materials 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 5
- 238000005342 ion exchange Methods 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 5
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 17
- 239000010410 layer Substances 0.000 description 8
- 238000003426 chemical strengthening reaction Methods 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 7
- 238000006124 Pilkington process Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005498 polishing Methods 0.000 description 5
- 239000005345 chemically strengthened glass Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012776 electronic material Substances 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Landscapes
- Surface Treatment Of Glass (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、フロート方式で製造され、表面を僅か研磨さ
れたフロートガラス、特に板厚が３mm以下の火造り面に
近い程度に研磨されたソーダ石灰系フロートガラスを、
電子材料の基板、ことに光デイスク用ガラス基板、フオ
トマスク用ガラス基板、各種デイスプレイ、デイバイス
部材等として適用することのできる反りも小さい平坦度
のよい高強化度をもつ化学強化フロートガラスを得る化
学強化方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a float glass manufactured by a float method and having a slightly polished surface, and in particular, is polished to a degree close to a fire-polished surface having a plate thickness of 3 mm or less. Soda lime float glass,
Chemically strengthened to obtain chemically strengthened float glass with low warpage and high degree of strengthening that can be applied as substrates for electronic materials, especially glass substrates for optical discs, glass substrates for photomasks, various displays, device members, etc. Regarding the method.
さらに本発明は、上記のほか、薄板で大面積の建築用お
よび車輌用窓ガラス、フロートガラスを用いた各種成型
品、調理用硝子製品および各種電子電気機器の基板等、
幅広く用いられるものである。Further, the present invention, in addition to the above, thin and large-area building and vehicle window glass, various molded products using float glass, glass products for cooking and substrates for various electronic and electrical devices, etc.,
It is widely used.
フロートガラスはいわゆる各種板ガラスに比べ表面平滑
性、平坦性、厚みの均一性等に優れているので建築、車
輌等の分野に加え電子材料分野、例えば液晶やプラズマ
等のデイスプレイなどにも広く利用されつつある。Float glass is excellent in surface smoothness, flatness, and thickness uniformity compared to so-called various flat glass, and is therefore widely used not only in the fields of construction, vehicles, etc., but also in the field of electronic materials, such as liquid crystal and plasma displays. It's starting.
さらに最近の傾向として３mm厚以下の薄板ガラスが賞用
されており、厚みが薄くなるほど、強度の向上が望まれ
ている。Further, as a recent trend, thin glass with a thickness of 3 mm or less has been favored, and it is desired to improve the strength as the thickness decreases.
薄板ガラスを効果的に強化するために、低温型あるいは
高温型等のアルカリイオン置換による化学強化方法を適
用することは周知であるが、フロートガラスにそのまま
化学強化法を用いた場合、ガラスに反りが生じて（例え
ば約１mm厚で0.4〜1.3mm／300mm径）平坦性を損ない、
ことに光デイスク基板等において要求される平坦度（例
えば約１mm厚で0.2mm／300mm径以下）を得ることができ
ないものであつた。In order to effectively strengthen thin glass, it is well known to apply a chemical strengthening method such as low temperature type or high temperature type by alkali ion substitution, but when the chemical strengthening method is used as it is for float glass, the glass warps. Occurs (for example, 0.4 to 1.3 mm / 300 mm diameter with a thickness of about 1 mm), which impairs flatness,
In particular, the flatness (for example, about 1 mm thickness and 0.2 mm / 300 mm diameter or less) required for an optical disk substrate or the like cannot be obtained.
前記反りの原因はガラスのフロート成形時における溶融
金属、通例Snの接触ガラス面への浸入の影響によるもの
であるが、この反りに対する画期的な対処法は見出され
ていない。例えば、ガラスのSn浸入面を研削、研磨した
うえでアルカリイオン置換処理することが実施されてい
るが、該Snの接触ガラス面におけるSnの拡散層は10〜20
μｍあり、最大この層の研削研磨が必要となり、この方
法では工程が煩雑であるのみならず、そのためのガラス
の割れおよび欠陥を生じるという研削研磨自体にも問題
があるものであつて、コスト上も高価なものとなる。The cause of the warp is due to the influence of molten metal, usually Sn, entering the contact glass surface during float forming of glass, but no epoch-making countermeasure against this warp has been found. For example, the Sn infiltrated surface of the glass has been ground and polished and then subjected to alkali ion substitution treatment, but the Sn diffusion layer on the contact glass surface of the Sn is 10 to 20.
.mu.m, which requires grinding and polishing of this layer at the maximum, and this method not only complicates the process, but also causes problems in grinding and polishing itself, which causes cracks and defects in the glass, which is costly. Is also expensive.
したがつて、上述の方法では光デイスク基板等にはフロ
ートガラスが採用されないものであつた。Therefore, in the above-mentioned method, the float glass is not used for the optical disk substrate or the like.
そこで、本出願人は既に出願した特願昭60-44926等によ
つて、フロートガラス製造の成形時における溶融金属に
接触した面（以下ボトム面という。）と非接触面（以下
トツプ面という。）とではその表層部でガラス成分組成
量に差が生ずることから、その差を矯正し、かつ強化時
のイオン交換量を増大させるために、Naイオンを含む溶
融塩、もしくはLiイオンをも含む混合溶融塩に浸漬処理
した後、化学強化を行う方法等を提案している。これに
より、安価で表面状態が優れかつ反り量が少ない高強度
の化学強化フロートガラスを提供することが可能となつ
たものである。Therefore, according to the Japanese Patent Application No. 60-44926 and the like, which the applicant has already filed, the surface which is in contact with the molten metal during molding of float glass (hereinafter referred to as the bottom surface) and the non-contact surface (hereinafter referred to as the top surface). ) And the difference in the glass component composition amount in the surface layer portion, in order to correct the difference and increase the ion exchange amount at the time of strengthening, a molten salt containing Na ions or Li ions are also included. A method for chemically strengthening after soaking in a mixed molten salt is proposed. As a result, it is possible to provide a high-strength chemically strengthened float glass that is inexpensive, has an excellent surface state, and has a small amount of warpage.
前記フロートガラスを基板用として使用するためには、
所定の形状に切断し、その端面を仕上げ処理する必要が
あり、その際ガラス表面におけるキズ防止手段として塩
ビ系の溶質とアルコール系の溶剤を用いる等によつて保
護膜をコーテイングすることが多々なされている。In order to use the float glass as a substrate,
It is necessary to cut into a predetermined shape and finish the end surface, and at that time, a protective film is often coated by using a vinyl chloride-based solute and an alcohol-based solvent as a scratch prevention means on the glass surface. ing.
しかし、前述のようなキズ防止対策を行つてもガラス表
面にキズが発生してしまうことがあり、そのキズをなく
し再生するためには、キズが生じている表面を0.1〜2.0
μｍ程度、CeO2等の研磨剤で表面研磨する必要があるも
のであつた。該CeO2研磨は通常行われている表面研削研
磨とはガラス表層の除去量が大きく異なり、フロートガ
ラスにおけるSnの拡散層が除去されないで残留している
こととなる。However, even if the above-mentioned scratch prevention measures are taken, scratches may still occur on the glass surface, and in order to eliminate the scratches and reproduce, the scratched surface should be 0.1 to 2.0.
The surface had to be polished with an abrasive such as CeO 2 of about μm. The removal amount of the glass surface layer of the CeO 2 polishing is greatly different from the surface grinding polishing which is usually performed, and the Sn diffusion layer in the float glass remains without being removed.
しかして、研磨されたフロートガラスに、前記特願昭60
-44926等の手段をそのまま適用すると、理由はさだかで
ないがガラス表面に白濁現象が生じるという問題があ
り、結果的に前記白濁現象を阻止しつつ、反りも小さく
しかもより破壊強度を増加することができず、前記研磨
されたフロートガラスは基板等の製品に再生しがたいも
のであつた。Then, the above-mentioned Japanese Patent Application No.
If the means such as -44926 is applied as it is, there is a problem that the clouding phenomenon occurs on the glass surface for a small reason, and as a result, while suppressing the clouding phenomenon, the warpage is small and the breaking strength can be further increased. However, the above-mentioned polished float glass was difficult to recycle into products such as substrates.
また、フロート法以外で製造されたガラスはSnの拡散層
はないが、一般に表面平滑性等表面状態がフロートガラ
スに比して悪く、表面研削研磨を行つて化学強化してい
る。Further, the glass produced by a method other than the float method does not have a Sn diffusion layer, but the surface condition such as surface smoothness is generally worse than that of the float glass, and the surface is ground and polished to chemically strengthen it.
しかし、前記フロート法以外で製造されたガラス基板あ
るいはフロートガラスのSn拡散層まで研削研磨したガラ
ス基板を、従来の単なる化学強化のみの破壊強度よりさ
らに増加しようとして、前記特願昭60-44926等の手段を
そのまま適用すると、やはりガラス表面に白濁現象が生
じるという問題がある。However, a glass substrate manufactured by a method other than the float method or a glass substrate ground to a Sn diffusion layer of a float glass by grinding and polishing is tried to further increase the breaking strength of conventional mere chemical strengthening. If the above method is applied as it is, there is still a problem in that a cloudy phenomenon occurs on the glass surface.
前述したように、Snの拡散層が残存している程度の研磨
をしたフロートガラスはそのままの表面状態では、化学
強化における反り防止および破壊強度の向上対策として
のNaイオンあるいはLiイオンをも含む溶融塩に浸漬前処
理を実施すると、ガラス表面に白濁を生じてしまい、透
明でより高強度の反り量の少ない化学強化ガラス製品を
得ることができないものである。As described above, the float glass that has been polished to the extent that the Sn diffusion layer remains remains in the surface state as it is, including Na ions or Li ions as a measure to prevent warpage in chemical strengthening and improve fracture strength. When the dipping pretreatment in salt is carried out, white turbidity occurs on the glass surface, and a transparent and higher strength chemically strengthened glass product with less warp amount cannot be obtained.
本発明は、従来のかかる欠点に鑑みてなしたものであつ
て、NaイオンもしくはLiイオンをも含む溶融塩に浸漬す
る前処理をする前に、併せてガラス表面を特定の温度と
時間で熱処理することで、表面を0.1〜２μ程度研磨さ
れたフロートガラスでも、反り量が少ない高強度でしか
も透明な化学強化ガラス製品を得る研磨されたガラスの
化学強化方法を提供するものである。The present invention has been made in view of the above-mentioned drawbacks of the prior art, in which before the pretreatment of immersing in a molten salt also containing Na ions or Li ions, the glass surface is also heat treated at a specific temperature and time. By doing so, it is possible to provide a chemical strengthening method for a polished glass, which is capable of obtaining a chemically strengthened glass product having a high strength and a small amount of warp even if the surface of the float glass is polished by about 0.1 to 2 μm.
すなわち、表面を0.1 〜２μ研磨されたソーダ石灰系フ
ロートガラスを、NaイオンもしくはLiイオンをも含む溶
融塩中に浸漬する前処理をした後、低温型イオン交換法
等によって化学強化するに当り、前記フロートガラスを
前以って400 〜550 ℃の雰囲気温度下で10〜120 分間か
けて熱処理した後、アルカリイオンとしてNaイオンもし
くはLiイオンをも含む溶融塩中に浸漬する前処理をし、
次いで該前処理をしたフロートガラスを低温型イオ交換
法によって化学強化するようにしたことを特徴とする研
磨されたガラスの化学強化方法を提供するものである。That is, when soda lime type float glass whose surface is polished by 0.1 to 2 μ is pretreated by immersing it in a molten salt also containing Na ions or Li ions, it is chemically strengthened by a low temperature type ion exchange method or the like. The float glass was previously heat-treated at an ambient temperature of 400 to 550 ° C. for 10 to 120 minutes, and then pretreated by immersing it in a molten salt containing Na ions or Li ions as alkali ions,
Then, the pretreated float glass is chemically strengthened by a low temperature type ion exchange method to provide a chemically strengthened method for polished glass.
ここで、前記熱処理温度を400〜550℃としたのは、400
℃未満では白濁を防止する効果を出すのに多大な時間を
要するため大幅なコスト増となり、550℃を超えるとガ
ラスの変形が生じ易くなるためである。好ましい熱処理
温度は420〜490℃である。Here, the heat treatment temperature is 400 to 550 ° C. is 400
This is because if the temperature is lower than ℃, it takes a lot of time to produce the effect of preventing clouding, resulting in a significant cost increase, and if the temperature exceeds 550 ℃, the glass is likely to be deformed. The preferable heat treatment temperature is 420 to 490 ° C.
さらに、前記熱処理時間を10〜120分間としたのは、１
０分間未満では白濁を防止するのが難しくなり、120分
間を超えるとガラスの変形あるいは必要以上に表面の組
成的変化特にアルカリイオンの挙動に基づく変化が大き
くなりすぎることとなり、生産性も下がつてコスト増と
なるものであるためである。好ましい熱処理時間は15〜
60分間である。Further, the heat treatment time is set to 10 to 120 minutes because
If it is less than 0 minutes, it becomes difficult to prevent clouding, and if it exceeds 120 minutes, the deformation of the glass or the compositional change of the surface more than necessary, especially the change due to the behavior of the alkali ion, becomes too large, which lowers the productivity. This is because the cost will increase. The preferred heat treatment time is 15-
60 minutes.
前述したとおり、本発明の熱的処理、浸漬前処理および
化学強化処理と順次特定条件下で処理することによつ
て、ガラスの表面をSnの拡散層が残留している程度のご
く僅か研磨した場合でも、白濁することがなく透明なし
かも反り量が0.2mm ／300mm 径以下の化学強化ガラス製
品を得ることができるようになるものである。As described above, the thermal treatment of the present invention, the dipping pretreatment and the chemical strengthening treatment were sequentially performed under specific conditions to polish the surface of the glass to a slight extent such that the Sn diffusion layer remained. Even in such a case, it is possible to obtain a chemically strengthened glass product which is transparent without clouding and has a warp amount of 0.2 mm / 300 mm or less.
すなわち、本発明によつて、フロート法で製造され、表
面を0.1〜２μ程度研磨されたフロートガラスは、研磨
してもその表面を火造り面に近い状態で、白濁および反
りの問題を解決できて、しかも破壊強度においても、従
来の単なる化学強化したガラスよりも約30％程度の大幅
な増加が可能になり、フロート法で製造されSn拡散層ま
で研削研磨されたガラスおよびフロート法以外で製造さ
れ研削研磨されたガラスにおいても、白濁の問題を解決
できて、破壊強度を研磨されたフロートガラスと同様に
約30％程度の大幅な増加をもたらすものである。That is, according to the present invention, the float glass manufactured by the float method and having the surface polished by about 0.1 to 2 μ can solve the problems of white turbidity and warpage with the surface being close to a fired surface even if polished. In addition, the breaking strength can be increased by about 30% compared to the conventional chemically strengthened glass, and the glass is manufactured by the float method and the Sn diffusion layer is ground and polished. Even in the glass that has been ground and polished, the problem of white turbidity can be solved, and the breaking strength can be greatly increased by about 30% as in the case of the ground float glass.
これらにより、フロートガラスの加工時における表面キ
ズの発生に対しても、比較的安価に対応できて再生で
き、例えば0.2mm／300mm径以下というデイスク基板の仕
様を満足する反り量で、破壊強度の大きい透明な基板と
なつて製品化できることになるものである。Due to these, even if surface scratches occur during the processing of float glass, they can be relatively inexpensively reproduced and can be regenerated. For example, the warp amount that satisfies the disk substrate specifications of 0.2 mm / 300 mm diameter or less, A large transparent substrate can be commercialized.
以下本発明の実施例について説明する。 Examples of the present invention will be described below.
実施例１〜４ 約１μｍ程度のキズを表面に発生している約１mm厚で約
300mm径のフロートガラス基板をCeO2で研磨してキズを
除去したものを用いて、表１の実施例に示す条件で先ず
熱処理で所定の第１の処理をし、つぎに、硝酸ナトリウ
ム中で所定の第２の前処理をした後、硝酸カリウムで低
温型の化学強化処理を行い試料とした。Examples 1 to 4 A scratch having a size of about 1 μm is generated on the surface, and the thickness is about 1 mm.
Using a float glass substrate having a diameter of 300 mm, which was polished with CeO 2 to remove scratches, first a predetermined first treatment was performed by heat treatment under the conditions shown in the examples of Table 1, and then in sodium nitrate. After performing a predetermined second pretreatment, a low temperature type chemical strengthening treatment with potassium nitrate was performed to obtain a sample.
得られた試料について、それぞれ５枚ずつについて、そ
の表面状態は目視で調べ、破壊強度は同心円負荷曲げ法
で測定し、反り量についてはDEKTAKII（SLOAN社製の形
状測定器）の測定によつて調べた。その結果を表１の実
施例に示し、破壊強度は５枚の平均値であり、反り量に
ついては５枚のバラツキを示した。The surface condition of each of the obtained 5 samples is visually inspected, the fracture strength is measured by the concentric load bending method, and the warp amount is measured by DEKTAKII (a shape measuring instrument manufactured by SLOAN). Examined. The results are shown in the examples of Table 1, the breaking strength was an average value of 5 sheets, and the warpage amount showed a variation of 5 sheets.
比較例１〜７ 実施例と同一の研磨したガラス基板を用いて、表１に示
す条件で処理して、実施例と同様な手段で測定した、そ
の結果を表１の比較例に示す。Comparative Examples 1 to 7 Using the same polished glass substrate as in Example, the glass substrate was treated under the conditions shown in Table 1 and measured by the same means as in Example. The results are shown in Comparative Example in Table 1.
〔発明の効果〕 前述した本発明の実施例と比較例を対比して示した表１
からも明らかなように、表面キズを発生した際も、充分
例えばデイスク基板等に再生し得て、特に薄板フロート
ガラス基板等で高強度で反り量も0.2mm／300mm径以下の
少ない透明なフロートガラスの本来の特性を生かした僅
かに研磨された化学強化フロートガラスとなるものであ
る。 [Effects of the invention] Table 1 showing comparison between the above-described examples of the present invention and comparative examples
As is clear from the above, even when surface scratches are generated, it can be sufficiently regenerated, for example, to a disk substrate or the like, and especially a thin float glass substrate or the like has high strength and a warp amount of 0.2 mm / 300 mm or less and a transparent float having a small diameter or less. It is a slightly polished chemically strengthened float glass that takes advantage of the original characteristics of glass.
さらに、本発明は表面を0.1〜２μ程度研削研磨された
フロートガラスにおいても、破壊強度が増加できて透明
性を保持できるので、従来より広い分野で採用でき得る
ようになるものである。Further, according to the present invention, even in the float glass whose surface is ground and polished by about 0.1 to 2 .mu., The breaking strength can be increased and the transparency can be maintained, so that the present invention can be adopted in a wider field than before.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−75944（ＪＰ，Ａ) 特開 昭56−26749（ＪＰ，Ａ) 特開 昭49−72317（ＪＰ，Ａ) 特開 昭48−23813（ＪＰ，Ａ) 作花済夫外編：”ガラスハンドブック" 朝倉書店 昭50−９−30 Ｐ．492 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-55-75944 (JP, A) JP-A-56-26749 (JP, A) JP-A-49-72317 (JP, A) JP-A-48- 23813 (JP, A) Sakuhana S. External: "Glass Handbook" Asakura Shoten Sho 50-9-30 P. 492
Claims (1)
フロートガラスを、NaイオンもしくはLiイオンをも含む
溶融塩中に浸漬する前処理をした後、低温型イオン交換
法によって化学強化するに当り、前記フロートガラスを
前以つて400 〜550 ℃の雰囲気温度下で10〜120 分間か
けて熱処理した後、アルカリイオンとしてNaイオンもし
くはLiイオンをも含む溶融塩中に浸漬する前処理をし、
次いで該前処理をしたフロートガラスを低温型イオン交
換法によって化学強化するようにしたことを特徴とする
研磨されたガラスの化学強化方法。1. A soda lime type float glass whose surface is polished by 0.1 to 2 μ is pretreated by immersing it in a molten salt also containing Na ions or Li ions, and then chemically strengthened by a low temperature type ion exchange method. Therefore, the float glass is preliminarily heat-treated at an ambient temperature of 400 to 550 ° C for 10 to 120 minutes, and then pretreated by immersing it in a molten salt containing Na ions or Li ions as alkali ions,
Then, the pretreated float glass is chemically strengthened by a low temperature type ion exchange method, which is a method for chemically strengthening a polished glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61117547A JPH0660038B2 (en) | 1986-05-23 | 1986-05-23 | Method for chemically strengthening polished glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61117547A JPH0660038B2 (en) | 1986-05-23 | 1986-05-23 | Method for chemically strengthening polished glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62275045A JPS62275045A (en) | 1987-11-30 |
| JPH0660038B2 true JPH0660038B2 (en) | 1994-08-10 |
Family
ID=14714506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61117547A Expired - Fee Related JPH0660038B2 (en) | 1986-05-23 | 1986-05-23 | Method for chemically strengthening polished glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0660038B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5896338B2 (en) * | 2011-01-18 | 2016-03-30 | 日本電気硝子株式会社 | Method for producing tempered glass and method for producing tempered glass plate |
| JP7578911B2 (en) * | 2021-03-11 | 2024-11-07 | 日本電気硝子株式会社 | Tempered glass and its manufacturing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4972317A (en) * | 1972-11-13 | 1974-07-12 | ||
| JPS5575944A (en) * | 1978-11-29 | 1980-06-07 | Toshiba Corp | Glass surface treating method |
| JPS5626749A (en) * | 1979-08-10 | 1981-03-14 | Toshiba Corp | Surface treatment of glass |
-
1986
- 1986-05-23 JP JP61117547A patent/JPH0660038B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 作花済夫外編："ガラスハンドブック"朝倉書店昭５０−９−３０Ｐ．４９２ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62275045A (en) | 1987-11-30 |
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