JPH0366434B2 - - Google Patents
Info
- Publication number
- JPH0366434B2 JPH0366434B2 JP12938482A JP12938482A JPH0366434B2 JP H0366434 B2 JPH0366434 B2 JP H0366434B2 JP 12938482 A JP12938482 A JP 12938482A JP 12938482 A JP12938482 A JP 12938482A JP H0366434 B2 JPH0366434 B2 JP H0366434B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- disintegration
- wet
- strength
- hypochlorite
- 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 - Lifetime
Links
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 13
- 239000000460 chlorine Substances 0.000 claims description 13
- 229910052801 chlorine Inorganic materials 0.000 claims description 13
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910001919 chlorite Inorganic materials 0.000 claims description 4
- 229910052619 chlorite group Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000123 paper Substances 0.000 description 29
- 239000003623 enhancer Substances 0.000 description 5
- 229920000877 Melamine resin Polymers 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000010893 paper waste Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 3
- 229960002218 sodium chlorite Drugs 0.000 description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000013054 paper strength agent Substances 0.000 description 2
- -1 phosphoric acid Chemical compound 0.000 description 2
- 159000000001 potassium salts Chemical class 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229920002085 Dialdehyde starch Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 229940077239 chlorous acid Drugs 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical class ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 235000011118 potassium hydroxide Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Paper (AREA)
Description
本発明は、湿潤強力紙の離解方法に関するもの
であり、更に詳しくは本発明はメラミン樹脂、ポ
リアミドエポキシ樹脂などの湿潤紙力増強剤にて
加工された湿潤強力紙の離解方法に関するもので
ある。
メラミン樹脂、ポリアミドエポキシ樹脂などの
湿潤紙力増強剤にて加工された湿潤強力紙は、湿
潤時の紙力保持性を生かして、各種包装用紙、二
次加工原紙、タオルペーパーなどをはじめとし
て、広く利用されている。
しかし、故紙、損紙の回収再生に際しては、か
かる湿潤時の紙力保持性が逆に、大きな欠点とな
つている。すなわち、通常の処理では、離解、回
収が著しく困難なためであり、業界では、その解
決が求められている。
その対応策として、ジアルデヒドスターチやグ
リオキザールなどのいわゆる一時性の湿潤紙力増
強剤が利用されているが、これらは半恒久的また
は高度な湿潤紙力が求められている分野には利用
できないという問題がある。
一方、メラミン樹脂、ポリアミドエポキシ樹脂
などの湿潤紙力増強剤にて加工された湿潤強力紙
の離解には、強度または長時間の機械的処理、過
熱蒸気などによる加熱処理が行われたり、また一
部には離解回収が困難なために損紙の焼却すら行
われている。このような方法は、省資源、省エネ
ルギー、コストの点から問題がある。
他方、離解を促進する薬剤を使用する方法があ
る。この方法は、塩酸、硫酸、スルフアミン酸、
リン酸などの酸、苛性ソーダ、苛性カリなどのア
ルカリおよび次亜塩素酸ソーダ、過酸化水素など
の酸化剤を脱樹脂剤、樹脂分解剤として用いるも
のである。
しかしながら、いずれも離解促進効果の点では
十分満足されるものではなかつた。
かかる事情に鑑み、本発明者らは湿潤強力紙の
離解を容易にする方法について鋭意検討を行つた
結果、特定の薬剤を特定の割合、すなわち亜塩素
酸塩と次亜塩素酸塩とを有効塩素量比にて20〜70
対80〜30の割合で水に溶解せしめた理解液に、湿
潤強力紙を浸漬し離解処理を施すことにより目的
が達成できることを見い出した。
すなわち、本発明は、亜塩素酸塩と次亜塩素酸
塩とを、有効塩素量比にて20〜70対80〜30の割合
で水に溶解させた離解液に、湿潤強力紙を浸漬
し、離解処理を施すことを特徴とする湿潤強力紙
の離解方法である。
本発明における亜塩素酸塩としては、亜塩素酸
のナトリウム塩、カリウム塩、カルシウム塩など
があり、次亜塩素酸塩としては、次亜塩素酸のナ
トリウム塩、カリウム塩、カルシウム塩などがあ
げられる。またさらし粉、高度さらし粉等は次亜
塩素酸塩として用いることができる。
亜塩素酸塩と次亜塩素酸塩は、有効塩素量比に
て20〜70対80〜30の割合、好ましくは30〜50対70
〜50の割合で用いられる。この範囲を超えると、
離解促進効果が低下し、本発明の効果が得られ難
くなる。
本発明において有効塩素量とは、亜塩素酸塩、
次亜塩素酸塩等、あるいはこれらを含有する例え
ばさらし粉、高度さらし粉などの塩素系酸化中の
酸化性酸素量をえ塩素量として表わしたものであ
り、JIS Ｌ−1041−1976の５−３−２の注１４な
どに記載される酸化還元滴定法などにより測定さ
れる値である。
本発明において湿潤強力紙とは、JIS Ｐ−0001
に規定する提厳密な意味ではなく、湿潤紙力増強
剤にて加工され、ある程度以上、つまり損紙、故
紙の離解、回収に影響を与える程度の湿潤紙力を
有する紙または板紙をいう。
本発明において離解処理を施す際に、加温する
ことは、よりすぐれた効果を得るためには有効で
あり、又、離解促進とために通常使用されている
浸透剤、分散剤、緩衝剤などを離解液に加えるこ
とはさしつかえない。
以下実施例にもとづき本発明を説明する。
なお実施例中の％はいずれも重量％であり、離
解試験方法及び離解の程度の評価方法は以下に示
す方法にて行つた。
＜離解試験方法＞
約２×２cmに裁断した湿潤強力紙、24ｇを、２
の離解液中に浸漬した後、JIS標準離解機にて
所定の時間、離解処理を施こす。
＜離解の程度の評価方法＞
所定条件で離解試験を施して得た湿潤強力紙の
回収パルプを用いて、30ｇ／m2の米坪量の紙を抄
造し、未離解パルプの残存程度を次に示した10段
階により評価する。
１（殆んど未離解）〜10（完全離解）
実施例１および比較例１〜５
スミレーズレジン675（住友化学工業社品、ポリ
アミドエポキシ系湿潤紙力増強剤）を、カナデイ
アンスタンダードフリネス45c.c.に叩解したＮ−
BKPに0.5％内添して得た湿潤強力紙（米坪量80
ｇ／m2）を用いて、第１表に示す離解液にて離解
処理を施した。離解温度は30℃であり、離解時
間、離解程度の評価効果は第１表に示した。
The present invention relates to a method for disintegrating wet strength paper, and more specifically, the present invention relates to a method for disintegrating wet strength paper processed with a wet paper strength enhancer such as a melamine resin or a polyamide epoxy resin. Wet strong paper processed with wet paper strength enhancers such as melamine resin and polyamide epoxy resin takes advantage of its ability to retain paper strength when wet, and can be used for various packaging papers, secondary processed base paper, towel paper, etc. Widely used. However, when collecting and recycling waste paper and wasted paper, such paper strength retention when wet is a major drawback. That is, this is because it is extremely difficult to disintegrate and recover with normal processing, and the industry is looking for a solution to this problem. As a countermeasure, so-called temporary wet paper strength enhancers such as dialdehyde starch and glyoxal are used, but these cannot be used in fields where semi-permanent or high wet paper strength is required. There's a problem. On the other hand, wet strength papers processed with wet paper strength agents such as melamine resins and polyamide epoxy resins are disintegrated by mechanical treatment for strength or long periods of time, heat treatment using superheated steam, etc. Some departments even incinerate waste paper because it is difficult to disintegrate and recover it. Such a method has problems in terms of resource saving, energy saving, and cost. On the other hand, there is a method of using agents that promote disaggregation. This method uses hydrochloric acid, sulfuric acid, sulfamic acid,
Acids such as phosphoric acid, alkalis such as caustic soda and caustic potash, and oxidizing agents such as sodium hypochlorite and hydrogen peroxide are used as resin removal agents and resin decomposition agents. However, none of them were fully satisfactory in terms of the disaggregation promoting effect. In view of these circumstances, the inventors of the present invention have conducted intensive studies on a method for facilitating the disintegration of wet strength paper. Chlorine amount ratio: 20 to 70
It has been discovered that the objective can be achieved by immersing wet strong paper in a solution dissolved in water at a ratio of 80 to 30 parts and subjecting it to disintegration treatment. That is, in the present invention, wet strong paper is immersed in a disintegrating solution in which chlorite and hypochlorite are dissolved in water at an effective chlorine ratio of 20 to 70 to 80 to 30. This is a method of disintegrating wet strong paper, which is characterized by subjecting it to a disaggregation treatment. Examples of chlorites in the present invention include sodium salts, potassium salts, and calcium salts of chlorous acid, and examples of hypochlorites include sodium salts, potassium salts, and calcium salts of hypochlorous acid. It will be done. In addition, bleaching powder, highly bleached powder, etc. can be used as hypochlorite. Chlorite and hypochlorite have an effective chlorine ratio of 20 to 70:80 to 30, preferably 30 to 50:70.
Used at a rate of ~50. Beyond this range,
The disaggregation promoting effect is reduced, making it difficult to obtain the effects of the present invention. In the present invention, the effective chlorine amount refers to chlorite,
The amount of oxidizing oxygen during chlorine-based oxidation of hypochlorite, etc., or bleaching powder, highly bleached powder, etc. containing these is expressed as the amount of chlorine, and is specified in 5-3- of JIS L-1041-1976. This is a value measured by the redox titration method described in Note 14 of 2. In the present invention, wet strength paper refers to JIS P-0001
It does not have a strict meaning, but refers to paper or paperboard that has been processed with a wet strength enhancer and has a wet strength above a certain level, that is, a level that affects the disintegration and recovery of broken paper and waste paper. When performing the disintegration treatment in the present invention, heating is effective in obtaining better effects, and penetrants, dispersants, buffers, etc. that are commonly used to promote disintegration, etc. It is permissible to add it to the disintegration solution. The present invention will be explained below based on Examples. Note that all percentages in the examples are percentages by weight, and the disintegration test method and the evaluation method for the degree of disintegration were performed using the methods shown below. <Disintegration test method> 24 g of wet strong paper cut into approximately 2 x 2 cm was
After being immersed in the disintegration solution, the material is subjected to disintegration treatment for a predetermined period of time using a JIS standard disintegration machine. <Method for evaluating the degree of disintegration> Using the recovered pulp of wet strong paper obtained by performing a disintegration test under specified conditions, paper with a weight of 30 g/m 2 per square meter is made, and the remaining degree of undisintegrated pulp is evaluated as follows. Evaluation will be made using the 10-level scale shown below. 1 (almost undisintegrated) to 10 (completely disintegrated) Example 1 and Comparative Examples 1 to 5 Sumiraze Resin 675 (manufactured by Sumitomo Chemical Co., Ltd., polyamide epoxy wet paper strength agent) was added to Canadian Standard Friness. N- beaten to 45c.c.
Wet strength paper obtained by adding 0.5% to BKP (basis weight 80
g/m 2 ), and was subjected to disaggregation treatment using the disaggregation solution shown in Table 1. The disintegration temperature was 30°C, and the evaluation effects of disintegration time and degree of disintegration are shown in Table 1.
【表】
（※）各薬品の有効塩素量は以下のとおりであ
る。
亜塩素酸ソーダ 130％
高度晒紛 60％
次亜塩素酸ソーダ 12％
したがつて実施例１における亜塩素酸ソーダ
と、高度晒紛（主成分、次亜塩素酸カルシウム）
との有効塩素量比は、38.2：61.8となる。
実施例 ２
実施例１と同様の湿潤強力紙を用いて、亜塩素
酸ソーダと次亜塩素酸ソーダの混合比（有効塩素
量比）を変化させた離解液による離解処理をおこ
なつた。離解薬品は、有効塩素量の総計として、
対紙添加量0.5％である。離解温度は40℃にて行
なつた。
実験結果等を第２表に示す。テストNo.〜が
本発明による実施例であり、他は比較例である。[Table] (*) The amount of available chlorine for each chemical is as follows. Sodium chlorite 130% Highly bleached powder 60% Sodium hypochlorite 12% Therefore, the sodium chlorite in Example 1 and the highly bleached powder (main component, calcium hypochlorite)
The effective chlorine ratio is 38.2:61.8. Example 2 Using the same wet strength paper as in Example 1, a disintegrating treatment was performed using a disintegrating solution in which the mixing ratio of sodium chlorite and sodium hypochlorite (available chlorine amount ratio) was varied. The total amount of available chlorine for disintegration chemicals is
The amount added to paper is 0.5%. The disintegration temperature was 40°C. The experimental results are shown in Table 2. Test Nos. ~ are examples according to the present invention, and the others are comparative examples.
【表】
実施例３およびひ比較例６〜８
スミレーズレジン607AC（住友化学工業社品、
メラミンホルムアルデヒド樹脂の酸コロイド、湿
潤紙力増強剤）を、カナデイアンスタンダードフ
リーネス400c.c.に叩解したＮ／Ｌ（３／７）BKP
に、0.5％内添して得た湿潤強力紙（米坪量120
ｇ／m2）を用いて、第３表に示す離解液にて離解
処理を施した。離解温度は80℃であり、離解時間
と離解の程度の評価は第３表に示す。[Table] Example 3 and Comparative Examples 6 to 8 Sumiraze Resin 607AC (Sumitomo Chemical Co., Ltd. product,
N/L (3/7) BKP made by beating melamine formaldehyde resin (acid colloid, wet paper strength enhancer) to Canadian Standard Freeness 400c.c.
Wet strength paper (basis weight 120
g/m 2 ), and was subjected to disaggregation treatment using a disaggregation solution shown in Table 3. The disintegration temperature was 80°C, and the disintegration time and evaluation of the degree of disintegration are shown in Table 3.
【表】
との有効塩素量比は１：２である。
(※※) 有効塩素量12％品を用いた。
[Table] The effective chlorine amount ratio is 1:2.
(※※) A product with an effective chlorine content of 12% was used.
Claims (1)
比にて20〜70対80〜30の割合で水に溶解させた離
解液に、湿潤強力紙を浸漬し離解処理を施すこと
を特徴とする湿潤強力紙の離解方法。1. Performing disintegration treatment by immersing wet strong paper in a disintegration solution in which chlorite and hypochlorite are dissolved in water at an effective chlorine ratio of 20 to 70 to 80 to 30. A method for disintegrating wet strong paper, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57129384A JPS5921790A (en) | 1982-07-23 | 1982-07-23 | Beating of wet strength paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57129384A JPS5921790A (en) | 1982-07-23 | 1982-07-23 | Beating of wet strength paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5921790A JPS5921790A (en) | 1984-02-03 |
| JPH0366434B2 true JPH0366434B2 (en) | 1991-10-17 |
Family
ID=15008240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57129384A Granted JPS5921790A (en) | 1982-07-23 | 1982-07-23 | Beating of wet strength paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921790A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2734256B2 (en) * | 1991-10-17 | 1998-03-30 | 富士ゼロックス株式会社 | Ink media for current transfer |
| JPH0655848A (en) * | 1992-08-06 | 1994-03-01 | Fuji Xerox Co Ltd | Electrothermal transfer recording medium |
| CA2105412C (en) * | 1992-09-03 | 1997-07-22 | Herbert H. Espy | Repulping paper and paperboard |
| ES2206467T3 (en) * | 1993-03-12 | 2004-05-16 | Fmc Corporation | BLENDS OF PERSULFATE TO MANUFACTURE RESISTANT PAPER IN MOISTURE. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2872313A (en) * | 1955-09-08 | 1959-02-03 | American Cyanamid Co | Pulping of paper broke containing wet-strength resins |
| JPS5620692A (en) * | 1979-07-30 | 1981-02-26 | Honshu Paper Co Ltd | Treatment of sticky impurities in used paper pulp |
-
1982
- 1982-07-23 JP JP57129384A patent/JPS5921790A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2872313A (en) * | 1955-09-08 | 1959-02-03 | American Cyanamid Co | Pulping of paper broke containing wet-strength resins |
| JPS5620692A (en) * | 1979-07-30 | 1981-02-26 | Honshu Paper Co Ltd | Treatment of sticky impurities in used paper pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5921790A (en) | 1984-02-03 |
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