JPH0450133A - Lead crystal glass composition for table ware reduced in elution of lead - Google Patents
Lead crystal glass composition for table ware reduced in elution of leadInfo
- Publication number
- JPH0450133A JPH0450133A JP15733990A JP15733990A JPH0450133A JP H0450133 A JPH0450133 A JP H0450133A JP 15733990 A JP15733990 A JP 15733990A JP 15733990 A JP15733990 A JP 15733990A JP H0450133 A JPH0450133 A JP H0450133A
- Authority
- JP
- Japan
- Prior art keywords
- lead
- glass
- composition
- elution
- amount
- 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.)
- Granted
Links
- 239000011521 glass Substances 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 title claims abstract description 24
- 239000005355 lead glass Substances 0.000 title claims abstract description 20
- 238000010828 elution Methods 0.000 title claims abstract description 16
- 238000000465 moulding Methods 0.000 claims description 5
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract description 9
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 6
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract description 5
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 4
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 2
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 2
- 150000001342 alkaline earth metals Chemical class 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- 239000006121 base glass Substances 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 7
- 238000004031 devitrification Methods 0.000 description 4
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 229910001887 tin oxide Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 206010040925 Skin striae Diseases 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008395 clarifying agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000010494 opalescence Effects 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/0028—Compositions for glass with special properties for crystal glass, e.g. lead-free crystal glass
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鉛溶出の少ない鉛ガラスクリスタル組成物、
特に食卓用船クリメタ２レガラス食器に好適なガラス組
成物に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention provides a lead glass crystal composition with little lead elution;
In particular, the present invention relates to a glass composition suitable for tableware Climeta 2 glass tableware.
（従来の技術）
例えば、高級ガラス食器などに使われる鉛クリスタルガ
ラスは、例えば、英国規格において２４重量％以上のＰ
ｂＯを含有することを規定されているが、通常、鉛クリ
スタルガラスは、ＰｂＯの含有量が増えるほど鉛の溶出
量が多くなることが知られている。(Prior art) For example, lead crystal glass used for high-grade glass tableware has a P content of 24% by weight or more according to British standards.
Although it is specified that lead crystal glass contains bO, it is generally known that as the content of PbO increases, the amount of lead eluted increases in lead crystal glass.
（発明が解決しようとする課題）
しかし、食器用鉛クリスタルガラスでは、鉛の溶出量の
少ないことが一般的に望ましいということができるので
、本発明者は、従来の鉛クリスタルガラスとしての特質
を保持しつつ、鉛溶出量の少ないガラス食器を提供でき
る鉛クリスタルガラス組成物、及びかかる組成物からな
るガラス器を提供することを目的として本発明をなすに
至ったものである。(Problem to be Solved by the Invention) However, since it can be said that it is generally desirable for lead crystal glass for tableware to have a small amount of lead eluted, the present inventor has developed the characteristics of conventional lead crystal glass. The present invention has been accomplished with the object of providing a lead crystal glass composition that can provide glassware with a small amount of lead elution while retaining lead, and a glassware made of such a composition.
（課題を解決する手段）
上記目的を実現するための本発明の特徴は、重量％で５
ｉ０２ ４４〜５７％、Ａｌ２Ｏ２０〜３％、Ｂ２Ｏ３
０〜２％、ｚ％、ＺｎＯ２０〜３％、Ｃａ００〜３．５
％、Ｍｇ００〜５％、Ｂａ００〜３．５％、５ｒＯ０〜
３．５％、Ｚｎ００〜３．５％、Ｌｉ２Ｏ０〜１％、Ｎ
ａ２００〜１２．５％、Ｋ２Ｏ０〜１２．５％、ｐｂ。(Means for Solving the Problems) The features of the present invention for realizing the above object are as follows:
i02 44-57%, Al2O20-3%, B2O3
0-2%, z%, ZnO20-3%, Ca00-3.5
%, Mg00~5%, Ba00~3.5%, 5rO0~
3.5%, Zn00~3.5%, Li2O0~1%, N
a200-12.5%, K2O0-12.5%, pb.
２３〜３３％、５ｎ０２０〜３％、ＬＢ２Ｏ３０〜３％
でかつ
５ｎ０２＋ Ｌａ２０． ＝ １ 〜６ ％Ｌｉ２
Ｏ＋ Ｎａ２Ｏ＋に２０ ＝ ２０ （（ＰｂＯ
＋ＣａＯ＋ＭｇＯ”ＢａＯ十ＳｒＯ＋Ｚｎ０） Ｘ Ｒ
）の関係式で示されたＲの値が０．２２〜０．２９の範
囲であることを特徴とする鉛溶出の少ない食器用鉛ガラ
スクリスタル組成物、およびこのガラス組成物を成形し
てなる鉛クリスタルガラス食器にある。23-33%, 5n020-3%, LB2O30-3%
Dekatsu5n02+ La20. = 1 to 6%Li2
20 to O+ Na2O+ = 20 ((PbO
+CaO+MgO"BaO+SrO+Zn0) X R
) A lead glass crystal composition for tableware with low lead elution, characterized in that the value of R shown by the relational expression is in the range of 0.22 to 0.29, and a product obtained by molding this glass composition. Found in lead crystal glassware.
本発明においてガラスの各組成範囲を上記の範囲に限定
した理由は、次のとおりである。The reason why each composition range of the glass is limited to the above range in the present invention is as follows.
まず基礎ガラス組成中ＳｉＯ□は、４４％未満では、化
学的耐久性が下がり、鉛溶出量が増加する。５７％を越
えると溶融ガラスの粘性が増加すると共に失透の発生傾
向も高くなる。First, if SiO□ in the basic glass composition is less than 44%, chemical durability decreases and the amount of lead eluted increases. When it exceeds 57%, the viscosity of the molten glass increases and the tendency for devitrification to occur increases.
Ａｌ２Ｏ３とＺｒＯ２は、ガラスの耐失透性と化学的耐
久性を向上させるが、いずれも３％を越えると溶融ガラ
スの粘性を増大させて好ましくない。Al2O3 and ZrO2 improve the devitrification resistance and chemical durability of the glass, but if both exceed 3%, they increase the viscosity of the molten glass, which is undesirable.
Ｂ２Ｏ３はガラスの高温粘性を下げ有効であるが、２％
を越えるとＢ２Ｏ３の揮発により脈理ができやすくなる
。B2O3 is effective in lowering the high temperature viscosity of glass, but 2%
If it exceeds this, striae are likely to form due to the volatilization of B2O3.
Ｌ１２０．Ｎａ２Ｏ，に２０はガラス溶融の融剤として
効果があり、このうちのＬｉ２Ｏは、少量でその効果が
表われるので０〜１％とすることが適当である。L120. Na2O, 20 is effective as a fluxing agent for glass melting, and since Li2O exhibits its effect with a small amount, it is appropriate to set it at 0 to 1%.
Ｃａｂ、 ＭｇＯ，Ｂａｄ、 ＳｒＯ，ｚｎｏは、いず
れも基礎ガラスの特性の調整用として添加されるもので
、このうちＣａＯは溶融温度を低下させるのに有効であ
るが、含有量が多くなると熱膨張率を高めると共にガラ
スの乳白化現象を促進する。Cab, MgO, Bad, SrO, and ZNO are all added to adjust the properties of the basic glass. Of these, CaO is effective in lowering the melting temperature, but when the content increases, thermal expansion increases. In addition to increasing the ratio, it also promotes the opalescence phenomenon of glass.
ＭｇＯは作業温度範囲の粘性曲線をゆるやかにし、その
添加により作業性のよいガラスが得られるが、含有量が
多くなると溶融温度を上昇させる傾向が大きくなる。Ｂ
ａＯは高温でのガラスの粘性を下げるが、含有量が多く
なると転移温度、軟化温度を上昇させるため、作業温度
範囲のせまい、作業性の劣るガラスとなる。ＳｒＯはフ
ラックスとして働きガラスの溶融性を高め有効であるが
、含有量が多くなると、鉛溶出量が増加する。ＺｎＯは
粘性温度曲線をゆるやかにし成形性を向上させ有効であ
るが、含有量が多くなると鉛溶出量が増加する。MgO softens the viscosity curve in the working temperature range, and by adding it, a glass with good workability can be obtained, but as the content increases, there is a greater tendency to increase the melting temperature. B
Although aO lowers the viscosity of glass at high temperatures, when its content increases, it increases the transition temperature and softening temperature, resulting in a glass with a narrow working temperature range and poor workability. SrO acts as a flux and is effective in increasing the melting properties of glass, but as its content increases, the amount of lead elution increases. ZnO is effective in making the viscosity temperature curve gentler and improving formability, but as its content increases, the amount of lead elution increases.
これらの理由から、Ｃａｂ、 ＭｇＯ，Ｂａｄ、 Ｓｒ
Ｏ，ＺｎＯは、共に基礎ガラスの特性の調整用として使
用されるのでＣａＯ，Ｂａｄ、 ＳｒＯ，ＺｎＯは３，
５％、ＭｇＯは５％以下とされることがよい。For these reasons, Cab, MgO, Bad, Sr
O and ZnO are both used to adjust the properties of the basic glass, so CaO, Bad, SrO, and ZnO are 3,
5%, and MgO is preferably 5% or less.
ＰｂＯは、２３％未満ではガラスの屈折率があまり高く
ならず、輝きが不足し、反対に３３％を越えると溶融時
の揮発により、脈理、石及び失透の発生が多くなる問題
を招くので上記範囲とされる。If PbO is less than 23%, the refractive index of the glass will not be very high and the glass will lack brilliance, while if it exceeds 33%, it will volatilize during melting, causing problems such as increased occurrence of striae, stones, and devitrification. Therefore, it is within the above range.
５ｎ０２＋ Ｌａ２Ｏ３は、１％未満では鉛溶出量を減
少させる能力が小さく、また６％を越えると鉛溶出量を
減少させる能力が低下するが、ＳｎＯ２は、単独で３％
を越えた場合、ガラス中への溶解性が悪いため鉛溶圧減
少の効果が得られない。またＬａ、Ｏ，は、単独で３％
を越えると鉛溶出量を減少させる能力が低下する。5n02+ La2O3 has a small ability to reduce the amount of lead elution when it is less than 1%, and the ability to reduce the amount of lead elution decreases when it exceeds 6%, but SnO2 alone has an ability to reduce the amount of lead elution.
If the lead content exceeds this value, the solubility in glass is poor and the effect of reducing the lead melting pressure cannot be obtained. Also, La, O, alone is 3%
If it exceeds this, the ability to reduce the amount of lead elution will decrease.
本発明のガラス組成物は、上記各成分の限定に加え、更
にＬｉ２Ｏ＋ Ｎａ２Ｏ＋ Ｋ２Ｏ＝ ２０− （（Ｐ
ｂＯ＋ＣａＯ＋ＭｇＯ＋ＢａＯ＋ＳｒＯ＋Ｚｎ０） ｘ
Ｒ） Ｒ＝０．２’２〜０．２９とすることによって
初めて本発明の目的を達成することができる。In addition to the above-mentioned limitations on each component, the glass composition of the present invention further includes Li2O+ Na2O+ K2O= 20- ((P
bO+CaO+MgO+BaO+SrO+Zn0) x
R) The object of the present invention can only be achieved by setting R=0.2'2 to 0.29.
ＰｂＯ及びアルカリ土類金属及びＺｎＯの総量に対する
アルカリ金属の添加量が上記の如く限定されるのは、Ｒ
＝ ０．２９を越えるとＬｉ２Ｏ＋ Ｎａ２Ｏ＋に２０
の合計量が少なく、失透が発生しやすく、０．２２に満
たないとＬｉ２Ｏ＋ Ｎａ２Ｏ＋に２０の合計量が多く
なり、鉛溶出量が増加するからである。これらのことは
ガラス食器から溶出する鉛量を減少させるという問題に
着目した本発明者の種々の研究の結果に基づくものであ
り、特に、酸化錫および／又は酸化ランタンを添加する
ことにより、ガラスからの鉛溶出量が減少するという知
見に関連して見いだされたものである。The reason why the amount of alkali metal added to the total amount of PbO, alkaline earth metals, and ZnO is limited as described above is because R
= 20 to Li2O+ Na2O+ when it exceeds 0.29
This is because the total amount of 20 is small and devitrification is likely to occur, and if it is less than 0.22, the total amount of 20 in Li2O+ Na2O+ will be large and the amount of lead elution will increase. These findings are based on the results of various studies conducted by the present inventor, focusing on the problem of reducing the amount of lead leached from glass tableware.In particular, by adding tin oxide and/or lanthanum oxide, This finding is related to the finding that the amount of lead leached from
なお本発明の組成物において、ＳｉＯ２＋ Ａｌ、０３
＋ Ｂ２Ｏ３＋ Ｚ％、ＺｎＯ２（７）合計は、４８％
〜５８％トスルコとが好ましい。４８％未満では鉛溶出
量が増加し、５８％を越えると溶融が困難となるからで
ある。In addition, in the composition of the present invention, SiO2+ Al, 03
+ B2O3 + Z%, ZnO2 (7) total is 48%
~58% Tosulco is preferred. This is because if it is less than 48%, the amount of lead eluted increases, and if it exceeds 58%, it becomes difficult to melt.
また本発明の組成物は、上記以外に清澄剤として５０３
． ＡＳ２０３．５ｂ２０ｓ 、着色剤としてＣ００゜
Ｎｉｐ、 Ｅｒ２（ｈ等の金属酸化物を含んでもよい。In addition to the above, the composition of the present invention also uses 503 as a clarifying agent.
．． AS203.5b20s may contain metal oxides such as C00°Nip and Er2(h) as colorants.
本発明のガラス組成物は、常法に従ってガラス原料を溶
融し、ガラスゴブを切り出して機械成形又は手吹き等の
成形加工を行うことによってガラス器を製造することか
できる。The glass composition of the present invention can be used to manufacture glassware by melting glass raw materials in accordance with a conventional method, cutting out glass gobs, and performing a molding process such as mechanical molding or hand blowing.
（発明の効果）
本発明により得られる鉛クリスタルガラス組成物によっ
て、新規な食器用船クリスタルガラス製品を提供するこ
とができ、この製品は色調は一般鉛クリスタルガラス食
器と同程度の透明度を有している。特に、本発明よりな
るガラス器は、当社の従来の鉛クリスタルガラス器と比
較して鉛溶出量の少ない性質を示すものでその有用性は
大である。(Effects of the Invention) By using the lead crystal glass composition obtained by the present invention, it is possible to provide a new ship crystal glass product for tableware, which has a color tone and transparency comparable to that of general lead crystal glass tableware. ing. In particular, the glassware of the present invention exhibits a property that the amount of lead eluted is smaller than that of our conventional lead crystal glassware, and is therefore highly useful.
（発明の実施例） 以下実施例について説明する。(Example of the invention) Examples will be described below.
実施例１
珪砂、水酸化アルミニウム、硼砂、酸化ジルコニウム、
炭酸カルシウム、水酸化マグネシウム、炭酸ストロンチ
ウム、炭酸カリウム、酸化鉛、酸化ランタン、酸化スズ
、酸化アンチモンを原料として表１の資料番号１−ＸＩ
Ｘの組成を満足するバッチを夫々調合した後、各々のハ
ツチを連帯式坩堝炉に入れ、１４５０’Ｃの温度で８時
間溶融した。得られた溶融ガラスを吹き竿で巻き取って
通常用いられている金型で吹き込み成形し、成形後、直
ちに成形品を徐冷炉により最高温度４５０〜５００℃で
徐冷した。製造工程における歩留まりも良好であった。Example 1 Silica sand, aluminum hydroxide, borax, zirconium oxide,
Material No. 1-XI in Table 1 using calcium carbonate, magnesium hydroxide, strontium carbonate, potassium carbonate, lead oxide, lanthanum oxide, tin oxide, and antimony oxide as raw materials
After each batch satisfying the composition of X was prepared, each hatch was placed in a joint crucible furnace and melted at a temperature of 1450'C for 8 hours. The obtained molten glass was wound up with a blowing rod and blow-molded using a commonly used mold. Immediately after the molding, the molded product was annealed in a lehr at a maximum temperature of 450 to 500°C. The yield in the manufacturing process was also good.
実施例２
表１のＩ ＮｘＤＣ組成から得られたガラスすべてにつ
いて、鉛溶出量を測定し、その結果を表１中に示した。Example 2 The amount of lead elution was measured for all the glasses obtained from the I NxDC composition shown in Table 1, and the results are shown in Table 1.
鉛溶出量の測定は以下によった。The amount of lead eluted was measured as follows.
ＪＩＳ Ｒ３５０２−１９５８に規定されているアルカ
リ溶出試験に準じた方法により、ガラスを粉砕し、ＪＩ
Ｓ Ｚ８８０１の標準網フルイ４２０μを通過し、２５
０μにとどまる大きさのガラス粉末の比重と同じｇ数を
４％酢酸５０ｍ１中で１時間煮沸した。鉛溶出量の定量
は原子吸光分析装置（島津製作所製ＡＡ−６４０−１２
）を使用し、結果は溶出液全体に含まれるＰｂｍｇ数に
換算して表わした。The glass is crushed by a method similar to the alkali elution test specified in JIS R3502-1958, and the JI
Passed through S Z8801 standard mesh sieve 420μ, 25
A number of grams equal to the specific gravity of glass powder having a size of 0 μ was boiled for 1 hour in 50 ml of 4% acetic acid. The amount of lead eluted was determined using an atomic absorption spectrometer (AA-640-12 manufactured by Shimadzu Corporation).
), and the results were expressed in terms of the number of Pbmg contained in the entire eluate.
これによれば、Ｒ値はすべて０．２２〜０．２９の範囲
にあり、鉛溶出量は、当社の代表的な鉛クリスタルガラ
スの鉛溶出量と比較して約％以下であった。According to this, the R values were all in the range of 0.22 to 0.29, and the amount of lead eluted was about % or less compared to the amount of lead eluted from our typical lead crystal glass.
比較例１
表２に示す酸化錫および／または酸化ランタンを含有し
ない組成の鉛クリスタルガラスのガラス器を常法により
製造し、その鉛溶出量を上記実施例と同様にして測定し
、その結果を表２中に示した。Comparative Example 1 A lead crystal glassware having a composition not containing tin oxide and/or lanthanum oxide shown in Table 2 was manufactured by a conventional method, and the amount of lead eluted was measured in the same manner as in the above example. It is shown in Table 2.
表２Table 2
Claims (1)
＿２Ｏ＿３０〜２％、ＺｒＯ＿２０〜３％、ＣａＯ０〜
３．５％、ＭｇＯ０〜５％、ＢａＯ０〜３．５％、Ｓｒ
Ｏ０〜３．５％、ＺｎＯ０〜３．５％、Ｌｉ＿２Ｏ０〜
１％、Ｎａ＿２Ｏ０〜１２．５％、Ｋ＿２Ｏ０〜１２．
５％、ＰｂＯ２３〜３３％、ＳｎＯ＿２０〜３％、Ｌａ
＿２Ｏ＿３０〜３％でかつ ＳｎＯ＿２＋Ｌａ＿２Ｏ＿３＝１〜６％ Ｌｉ＿２Ｏ＋Ｎａ＿２Ｏ＋Ｋ＿２Ｏ＝２０−｛（ＰｂＯ
＋ＣａＯ＋ＭｇＯ＋ＢａＯ＋ＳｒＯ＋ＺｎＯ）×Ｒ｝の
関係式で示されたＲの値が０．２２〜０．２９の範囲で
あることを特徴とする鉛溶出の少ない食器用鉛クリスタ
ルガラス組成物。 ２、請求項１の組成物を成形してなる鉛クリスタルガラ
ス食器。[Claims] 1. SiO_244-57%, Al_2O_30-3%, B
_2O_30~2%, ZrO_20~3%, CaO0~
3.5%, MgO0-5%, BaO0-3.5%, Sr
O0~3.5%, ZnO0~3.5%, Li_2O0~
1%, Na_2O0-12.5%, K_2O0-12.
5%, PbO23-33%, SnO_20-3%, La
_2O_30-3% and SnO_2+La_2O_3=1-6% Li_2O+Na_2O+K_2O=20-{(PbO
+CaO+MgO+BaO+SrO+ZnO)×R} A lead crystal glass composition for tableware with little lead elution, characterized in that the value of R shown by the relational expression } is in the range of 0.22 to 0.29. 2. Lead crystal glass tableware formed by molding the composition of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2157339A JP2515041B2 (en) | 1990-06-15 | 1990-06-15 | Crystal glass tableware with low lead elution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2157339A JP2515041B2 (en) | 1990-06-15 | 1990-06-15 | Crystal glass tableware with low lead elution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0450133A true JPH0450133A (en) | 1992-02-19 |
| JP2515041B2 JP2515041B2 (en) | 1996-07-10 |
Family
ID=15647530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2157339A Expired - Lifetime JP2515041B2 (en) | 1990-06-15 | 1990-06-15 | Crystal glass tableware with low lead elution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515041B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376597A (en) * | 1992-10-20 | 1994-12-27 | Toyo Glass Company Limited | Lead-free glass composition having properties similar to lead crystal glass |
| WO1998056724A1 (en) * | 1997-06-09 | 1998-12-17 | D. Swarovski & Co. | Glass composition |
| WO2008132887A1 (en) * | 2007-04-17 | 2008-11-06 | Asahi Glass Company, Limited | Method for producing alkali-free glass |
| CN120004504A (en) * | 2025-02-18 | 2025-05-16 | 成都光明光电股份有限公司 | Optical glass and glass components |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61266328A (en) * | 1985-05-20 | 1986-11-26 | コ−ニング グラス ワ−クス | Glass-ceramic product and glaze therefor |
-
1990
- 1990-06-15 JP JP2157339A patent/JP2515041B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61266328A (en) * | 1985-05-20 | 1986-11-26 | コ−ニング グラス ワ−クス | Glass-ceramic product and glaze therefor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5376597A (en) * | 1992-10-20 | 1994-12-27 | Toyo Glass Company Limited | Lead-free glass composition having properties similar to lead crystal glass |
| WO1998056724A1 (en) * | 1997-06-09 | 1998-12-17 | D. Swarovski & Co. | Glass composition |
| WO2008132887A1 (en) * | 2007-04-17 | 2008-11-06 | Asahi Glass Company, Limited | Method for producing alkali-free glass |
| CN120004504A (en) * | 2025-02-18 | 2025-05-16 | 成都光明光电股份有限公司 | Optical glass and glass components |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2515041B2 (en) | 1996-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5599754A (en) | Glass composition for a substrate, and substrate for plasma display made thereof | |
| US3723142A (en) | Neutral gray glass | |
| US5459110A (en) | Highly chemically and thermally resistant borosilicate glass which is capable of forming a seal with tungsten | |
| EP0582113B1 (en) | Non-lead sealing glasses | |
| US3275492A (en) | Opal glass with a low coefficient of thermal expansion | |
| JP2001080933A (en) | Crystal glass not containing lead and barium | |
| JPH0812368A (en) | Optical glass | |
| CA2137122C (en) | Lead-free glasses exhibiting characteristics of crystal | |
| HK1000594B (en) | Zinc containing, lead-free and cadmium-free glass frits, method of their preparation and their utilization | |
| JP2000313635A (en) | Material for plasma display panel | |
| HK1000594A1 (en) | Zinc containing, lead-free and cadmium-free glass frits, method of their preparation and their utilization | |
| US4394453A (en) | Envelopes for tungsten-halogen lamps | |
| JPH06256027A (en) | Glass composition | |
| JPH07108787B2 (en) | Glass for cathode ray tube face plate | |
| US3970465A (en) | Method of composing a mixture for lead glass | |
| SE429852B (en) | COMPOSITION FOR PREPARATION OF GLASS WITH HIGH SCRATCH INDEX | |
| JPH0450133A (en) | Lead crystal glass composition for table ware reduced in elution of lead | |
| JPH0274536A (en) | Hard glass for press molding | |
| JPS63215533A (en) | Cathode-ray tube panel glass | |
| EP0683758B1 (en) | Unleaded transparent vitreous glass composition and articles | |
| JPS6344699B2 (en) | ||
| GB2410945A (en) | Crystallization-stable alumino-silicate glass, its manufacture and its uses | |
| JPS60260443A (en) | Glass composition causing small degree of elution of alkaline component | |
| JPS61295256A (en) | Glass for substrate | |
| US3769047A (en) | Method of depressing the liquidus temperature of lanthanum aluminogermanate glasses, and the glasses produced |