JPH0539531A - Manufacture of sintered ore - Google Patents
Manufacture of sintered oreInfo
- Publication number
- JPH0539531A JPH0539531A JP19759991A JP19759991A JPH0539531A JP H0539531 A JPH0539531 A JP H0539531A JP 19759991 A JP19759991 A JP 19759991A JP 19759991 A JP19759991 A JP 19759991A JP H0539531 A JPH0539531 A JP H0539531A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- raw material
- pallet
- sintering
- material layer
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、焼結ベッド上層部の冷
間強度および歩留りの向上を図る焼結鉱の製造方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a sintered ore for improving the cold strength and the yield of the upper layer of a sintered bed.
【０００２】[0002]
【従来の技術】走行するパレットに焼結原料を装入し、
焼結原料層の表面に点火し、下向きに吸引することによ
り、焼結鉱を製造する焼結鉱製造方法においては、焼結
ベッド（焼結層）の上層部の強度が低く、歩留りが悪く
なる。これは、焼結ベッドの上層部が吸引される冷空気
により冷却され、焼結するのに充分な温度および時間が
無くなる（熱量不足になる）ためと考えられている。2. Description of the Related Art Sintering raw materials are charged into a traveling pallet,
In the sinter production method of producing sinter by igniting the surface of the sinter raw material layer and sucking it downward, the strength of the upper part of the sinter bed (sinter layer) is low and the yield is poor. Become. It is considered that this is because the upper layer portion of the sintering bed is cooled by the sucked cold air and there is no sufficient temperature and time for sintering (insufficient amount of heat).
【０００３】焼結ベッドの上層部の強度の低下等を防止
する提案が幾つかなされている。特開昭６３−１７６４
３７号公報は、焼結機の給鉱部のカットプレートと点火
炉の間に一本のロールを設け、原料層を圧密するものに
おいて、ロールの周速Ｖとパレット速度ｖとの比Ｖ／ｖ
が０．１〜１．５となる周速でロールにより原料層を圧
密するものである。Several proposals have been made to prevent the strength of the upper layer of the sintering bed from being lowered. JP-A-63-1764
Japanese Patent Laid-Open No. 37-37 discloses that one roll is provided between the cut plate of the ore feeding section of the sintering machine and the ignition furnace to consolidate the raw material layer. v
The raw material layer is compacted by a roll at a peripheral speed of 0.1 to 1.5.
【０００４】[0004]
【発明が解決しようとする課題】当出願人は、前記のよ
うな問題点を解決するために、特願平０３−０２０９３
６号と特願平０３−０２０９３７号を先に出願した。特
願平０３−０２０９３６号の発明は、焼結機に装入され
た点火前の焼結原料層の表層を、円盤状の突起を有する
ローラで圧密するものであり、特願平０３−０２０９３
７号の発明は、焼結機に装入された点火前の焼結原料層
の表層を、棒状の突起を有するローラで圧密するもので
ある。DISCLOSURE OF THE INVENTION In order to solve the above-mentioned problems, the present applicant has filed Japanese Patent Application No. 03-02093.
No. 6 and Japanese Patent Application No. 03-020937 were filed first. The invention of Japanese Patent Application No. 03-020936 is to compact the surface layer of the sintering raw material layer, which has been charged into the sintering machine, before ignition, by a roller having a disk-shaped projection.
The invention of No. 7 consolidates the surface layer of the sintering raw material layer, which has been charged into the sintering machine, before ignition with a roller having a rod-shaped projection.
【０００５】前記した先行技術は、いずれも一本のロー
ラでパレット全幅を圧密するため、壁効果により原料層
の両側部が中央部よりも吸引風量が多くなり生じる、中
央部よりも両側部の冷間強度等が低下する問題点は解決
されない。In each of the above-mentioned prior arts, since the entire width of the pallet is compacted by one roller, both sides of the raw material layer generate a larger amount of suction air than the central part due to the wall effect. The problem that cold strength and the like decrease is not solved.
【０００６】そこで、本発明は上記の問題点をも解決で
きる焼結鉱の製造方法を提供することを目的とするもの
である。Therefore, an object of the present invention is to provide a method for producing a sintered ore which can solve the above problems.
【０００７】[0007]
【課題を解決するための手段】本発明は上記のような目
的を達成しようとするもので、第１の方法は、焼結機の
原料装入シュートと点火炉の間の原料層の上部に、パレ
ット幅方向の中央部に配設した回転自在な第１のローラ
と、両側部に設けた回転自在な第２のローラとをパレッ
トの進行方向に位置をずらして設け、前記の第１および
第２のローラを独立して上下方向に移動可能に設け、第
２のローラの圧密深さを第１のローラの圧密深さより深
く原料層を圧密して焼結することを特徴とする焼結鉱製
造方法である。DISCLOSURE OF THE INVENTION The present invention is intended to achieve the above-mentioned object, and the first method is to provide the upper part of the raw material layer between the raw material charging chute of the sintering machine and the ignition furnace. , A rotatable first roller disposed in the center of the pallet width direction and a rotatable second roller disposed on both sides of the pallet, which are staggered in the traveling direction of the pallet. Sintering characterized in that the second roller is independently movable in the vertical direction, and the compaction depth of the second roller is deeper than the consolidation depth of the first roller and the raw material layer is compacted and sintered. It is a method of producing ore.
【０００８】第２の方法は、第１の方法において、第２
のローラを傾斜させ且つパレット側板側の圧密深さを他
側のそれより深くして圧密する方法である。The second method is the same as the first method except that the second
In this method, the rollers are inclined and the pallet side plate side is made deeper than the other side to perform consolidation.
【０００９】第３の方法は、焼結機の原料装入シュート
と点火炉の間の原料層の上部に、パレット幅方向の中央
部に配設した回転自在な第１のローラと、両側部に複数
の回転自在な第２のローラ群とをパレットの進行方向に
位置をずらして設け、前記第１および第２のローラ群を
独立して上下方向に移動可能に設けて第２のローラ群の
圧密深さを第１のローラの圧密深さより深く原料層を圧
密して焼結することを特徴とする焼結鉱製造方法であ
る。In the third method, a rotatable first roller disposed at the center of the pallet in the width direction of the pallet is located above the raw material layer between the raw material charging chute of the sintering machine and the ignition furnace, and both side portions. A plurality of rotatable second roller groups, which are displaced from each other in the traveling direction of the pallet, and the first and second roller groups are independently movably provided in the vertical direction. The method for producing a sinter is characterized in that the raw material layer is compacted and sintered with a consolidation depth deeper than the consolidation depth of the first roller.
【００１０】第４の方法は、第３の方法において、第２
のローラ群を傾斜させ且つパレット側板側の圧密深さを
他側のそれより深くして圧密する方法である。The fourth method is the second method of the third method.
This is a method of inclining the roller group and making the consolidation depth on the pallet side plate side deeper than that on the other side for consolidation.
【００１１】[0011]
【作用】本発明では、パレット幅方向の中央部に配設し
た回転自在な第１のローラと、両側部に一対の回転自在
な第２のローラとをパレットの進行方向に位置をずらし
て設け、第１のローラと第２のローラを独立して上下動
できるようにしてあるから、吸引風量の多い両側部の原
料層の圧密深さを、中央部のそれより適当量深くするこ
とにより、パレット全幅の吸引風量を均一化することが
できる。According to the present invention, a rotatable first roller disposed at the center of the pallet width direction and a pair of rotatable second rollers disposed on both sides of the pallet are displaced in the traveling direction of the pallet. Since the first roller and the second roller can be independently moved up and down, by making the consolidation depth of the raw material layers on both sides where the amount of suction air is large deeper than that of the central portion, The suction air volume over the entire width of the pallet can be made uniform.
【００１２】両側部に設ける第２のローラを傾斜させ且
つパレットの側板側の圧密深さを他側のそれよりも深く
して圧密すれば、第１のローラと第２のローラの境の原
料層表面にに段差が無くなり、より点火がし易くなる。
また、原料層の密度を側板側に直線的に増加することが
でき、強度および歩留りを段差のある場合に比し、より
向上させるとができる。By inclining the second roller provided on both sides and making the side plate side of the pallet deeper than the other side to consolidate, the raw material at the boundary between the first roller and the second roller. Since there is no step on the surface of the layer, ignition becomes easier.
Further, the density of the raw material layer can be linearly increased toward the side plate, and the strength and the yield can be further improved as compared with the case where there is a step.
【００１３】[0013]
【実施例】本発明の実施例を図面に基づいて以下に説明
する。図１は本発明の方法を説明する原料層断面図、図
２は本発明方法に係る圧密ローラ取付け箇所の斜視図で
ある。図示しないベルトコンベヤで搬送されてきた焼結
原料は、サージホッパー１に投入され、ロールフィーダ
３により切り出され、装入シュート３を経由して点火炉
６方向に移動しているパレット４の上に装入される。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a raw material layer for explaining the method of the present invention, and FIG. 2 is a perspective view of a consolidating roller mounting portion according to the method of the present invention. The sintering raw material conveyed by a belt conveyor (not shown) is put into a surge hopper 1, cut out by a roll feeder 3, and passes through a charging chute 3 onto a pallet 4 moving toward an ignition furnace 6. Charged.
【００１４】パレット４に装入された焼結原料は、装入
シュート３の後背部に設けられたカットプレート（図示
せず）により、その表面を均され所定装入厚さの原料層
５となり、点火炉６に向かって移動してゆく。The sintering raw material charged in the pallet 4 is leveled on its surface by a cut plate (not shown) provided at the back of the charging chute 3 to form a raw material layer 5 having a predetermined charging thickness. , Moving toward the ignition furnace 6.
【００１５】本発明において、第１のローラ７および第
２のローラ８は、次のように構成し、配設されている。In the present invention, the first roller 7 and the second roller 8 are constructed and arranged as follows.
【００１６】装入シュート３と点火炉６の間の適当位置
の原料層５の表面上に、パレット４の幅方向の中央部に
回転自在で且つ上下方向に移動可能な長い第１のローラ
７を設け、第１のローラ７とパレットの進行方向に位置
をずらして、パレット４の幅方向の両側部に回転自在で
且つ上下方向に移動可能な短い第２のローラ８ａ，８ｂ
を設けている。第１のローラ７と第２のローラ８ａ，８
ｂとは、それぞれ独立した上下動手段を有しており、圧
密深さを独立して変えられる。On the surface of the raw material layer 5 at an appropriate position between the charging chute 3 and the ignition furnace 6, a long first roller 7 rotatable in the widthwise central portion of the pallet 4 and movable in the vertical direction. Is provided, and the second rollers 8a and 8b are rotatably mounted on both sides of the pallet 4 in the width direction and vertically movable by displacing the first roller 7 and the pallet in the traveling direction.
Is provided. First roller 7 and second rollers 8a, 8
b has independent vertical movement means, and the consolidation depth can be changed independently.
【００１７】第１のローラ７と第２のローラ８ａ，８ｂ
は、図２に示すように、原料層に圧密されない部分が生
じないよう、端部部分が重複して配設される。また、第
１のローラおよび第２のローラは、その軸頸部がボール
ベアリング等で支持されており、移動する原料層５によ
り回転される。First roller 7 and second rollers 8a, 8b
As shown in FIG. 2, the end portions are arranged so as to overlap each other so that the raw material layer does not have an unconsolidated portion. The shaft necks of the first roller and the second roller are supported by ball bearings and the like, and are rotated by the moving raw material layer 5.
【００１８】第２のローラは、片側に複数本のローラで
構成することもでき、また図３に示すようにパレットの
側板に向かって下り傾斜に配設してもよい。The second roller may be composed of a plurality of rollers on one side, or, as shown in FIG. 3, may be arranged so as to be inclined downward toward the side plate of the pallet.
【００１９】本発明は、上記のように構成、配設された
第２のローラ８ａ，８ｂの圧密深さｈ2 を第１のローラ
７の圧密深さｈ1 より深くして圧密した後、点火炉６で
その表面に点火して焼結するものである。第１のローラ
７は原料層５を水平に圧密するが、第２のローラ８ａ，
８ｂの圧密方法は、図３に示すように傾斜させて行なう
方法と図４に示すように水平にして行なう方法がある。According to the present invention, after the consolidation depth h 2 of the second rollers 8a and 8b configured and arranged as described above is made deeper than the consolidation depth h 1 of the first roller 7, the consolidation is performed. The surface of the ignition furnace 6 is ignited and sintered. The first roller 7 horizontally compacts the raw material layer 5, but the second roller 8a,
The consolidation method of 8b includes a method of inclining as shown in FIG. 3 and a method of horizontally leveling as shown in FIG.
【００２０】次に本発明方法の実施結果について説明す
る。図５および表１は、従来方法で圧密した２例と本発
明方法で圧密した３例について焼結鉱の製造諸元を示し
たものである。なお、第２のローラ（短ローラ）の圧密
方法は、傾斜圧密（図３の方法）とした。また、使用し
たローラの寸法は、第１のローラ長：４５００mm，第２
のローラ長：６００mm，第１のローラと第２のローラの
ラップ量：３００mmとした。Next, the results of carrying out the method of the present invention will be described. FIG. 5 and Table 1 show the production specifications of the sintered ore for two examples consolidated by the conventional method and three examples consolidated by the method of the present invention. The method for compacting the second roller (short roller) was tilt consolidation (method in FIG. 3). The dimensions of the roller used are as follows: first roller length: 4500 mm, second roller
The roller length was 600 mm, and the lap amount between the first roller and the second roller was 300 mm.
【００２１】本発明方法の返鉱原単位は従来法のそれよ
り少なくなっている。即ち焼結歩留りが向上している。
また、焼結鉱の強度（冷間強度）も本発明方法のもの
が、従来法のものより０．５％だけ向上している。The return ore unit of the method of the present invention is lower than that of the conventional method. That is, the sintering yield is improved.
Further, the strength (cold strength) of the sinter is improved by 0.5% in the method of the present invention as compared with the conventional method.
【００２２】本発明方法３例では、第１のローラの圧密
深さ：２０mm，第２のローラの圧密深さ：４０mmとした
ものが、返鉱原単位、焼結鉱の強度とも一番優れた結果
となった。In the three examples of the method of the present invention, the consolidation depth of the first roller: 20 mm and the consolidation depth of the second roller: 40 mm are the best in terms of the return ore unit and the strength of the sintered ore. It was the result.
【００２３】[0023]
【表１】 [Table 1]
【００２４】図６および表２は、従来方法で圧密した他
の２例と本発明方法で圧密した他の２例について焼結鉱
の製造諸元を示したものである。この例は、外周にリン
グ状突起または棒状突起を付けたローラを使用して行な
った。FIG. 6 and Table 2 show the production specifications of the sintered ore for the other two examples consolidated by the conventional method and the other two examples consolidated by the method of the present invention. This example was performed using a roller having a ring-shaped protrusion or a rod-shaped protrusion on the outer periphery.
【００２５】本発明方法の返鉱原単位は従来法のそれよ
り１２kg/Tだけ少なくなっている。即ち焼結歩留りが向
上している。また、焼結鉱の強度（冷間強度）も本発明
方法のものが、従来法のものより０．５％だけ向上して
いる。The return ore unit of the method of the present invention is 12 kg / T less than that of the conventional method. That is, the sintering yield is improved. Further, the strength (cold strength) of the sinter is improved by 0.5% in the method of the present invention as compared with the conventional method.
【００２６】本発明方法の２例では、返鉱原単位および
焼結鉱の強度ともほぼ等しい結果となった。In the two examples of the method of the present invention, the results of the return ore unit and the strength of the sintered ore were almost equal.
【００２７】[0027]
【表２】 [Table 2]
【００２８】[0028]
【発明の効果】本発明方法は上記のように構成されてい
るから、一本のローラで圧密する従来法に比較して、焼
結層の幅方向の通気性が均一となり、返鉱原単位が減少
（焼結歩留りの向上）し、焼結鉱の冷間強度が向上する
という効果が得られる。Since the method of the present invention is constituted as described above, the air permeability in the width direction of the sintered layer becomes more uniform and the unit of return ore unit is more uniform as compared with the conventional method of compacting with one roller. Is reduced (improvement of the sintering yield), and the effect of improving the cold strength of the sintered ore is obtained.
【図１】本発明の方法を説明する原料層断面図である。FIG. 1 is a sectional view of a raw material layer illustrating a method of the present invention.
【図２】本発明方法に係る圧密ローラ取付け箇所の斜視
図である。FIG. 2 is a perspective view of a compaction roller mounting portion according to the method of the present invention.
【図３】両側部を傾斜圧密する本発明方法の説明図であ
る。FIG. 3 is an explanatory view of a method of the present invention in which both sides are inclined and consolidated.
【図４】両側部を水平圧密する本発明方法の説明図であ
る。FIG. 4 is an explanatory view of the method of the present invention in which both sides are horizontally consolidated.
【図５】従来方法で圧密した２例と本発明方法で圧密し
た３例について焼結鉱の製造諸元を示したグラフであ
る。FIG. 5 is a graph showing manufacturing specifications of sinter for two examples consolidated by the conventional method and three examples consolidated by the method of the present invention.
【図６】従来方法で圧密した他の２例と本発明方法で圧
密した他の２例について焼結鉱の製造諸元を示したグラ
フである。FIG. 6 is a graph showing manufacturing specifications of sinter for another two examples consolidated by the conventional method and another two examples consolidated by the method of the present invention.
３ 装入シュート ４ パレット ５ 原料層 ６ 点火炉 ７ 第１のローラ ８ 第２のローラ 3 Charging Chute 4 Pallet 5 Raw Material Layer 6 Ignition Furnace 7 First Roller 8 Second Roller
───────────────────────────────────────────────────── フロントページの続き (72)発明者 清水 正安 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 (72)発明者 野田 英俊 東京都千代田区丸の内１丁目１番２号 日 本鋼管株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masayasu Shimizu Inventor, Marunouchi 1-2-2, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Hidetoshi Noda 1-2-1 Marunouchi, Chiyoda-ku, Tokyo Date Inside the steel pipe company
Claims (4)
の原料層の上部に、パレット幅方向の中央部に配設した
回転自在な第１のローラと、両側部に設けた回転自在な
第２のローラとをパレットの進行方向に位置をずらして
設け、前記第１および第２のローラを独立して上下方向
に移動可能に設けて第２のローラの圧密深さを第１のロ
ーラの圧密深さより深く原料層を圧密して焼結すること
を特徴とする焼結鉱製造方法。1. A rotatable first roller arranged in the center of the pallet width direction at the upper part of the raw material layer between the raw material charging chute of the sintering machine and the ignition furnace, and a rotation provided on both sides. A freely movable second roller is provided so as to be displaced in the traveling direction of the pallet, and the first and second rollers are independently movably provided in the vertical direction so that the consolidation depth of the second roller becomes the first. The method for producing a sinter according to claim 1, wherein the raw material layer is compacted and sintered deeper than the consolidation depth of the roller.
板側の圧密深さを他側のそれより深くして圧密する請求
項１記載の焼結鉱製造方法。2. The method for producing a sinter according to claim 1, wherein the second roller is inclined and the consolidation depth on the pallet side plate side is made deeper than that on the other side to consolidate.
の原料層の上部に、パレット幅方向の中央部に配設した
回転自在な第１のローラと、両側部に設けた複数の回転
自在な第２のローラ群とをパレットの進行方向に位置を
ずらして設け、前記第１および第２のローラ群を独立し
て上下方向に移動可能に設けて第２のローラ群の圧密深
さを第１のローラの圧密深さより深く原料層を圧密して
焼結することを特徴とする焼結鉱製造方法。3. A rotatable first roller arranged in the center of the pallet width direction at the upper part of the raw material layer between the raw material charging chute of the sintering machine and the ignition furnace, and a plurality of rollers provided on both sides. And a rotatable second roller group of the first roller group and the second roller group of the second roller group, which are displaced in the traveling direction of the pallet, and are independently movable in the vertical direction to consolidate the second roller group. A method for producing a sintered ore, characterized in that the raw material layer is compacted and sintered to a depth deeper than the consolidation depth of the first roller.
側板側の圧密深さを他側のそれより深くして圧密する請
求項１記載の焼結鉱製造方法。4. The method for producing a sinter according to claim 1, wherein the second roller group is inclined and the pallet side plate side is made deeper than the other side so as to be consolidated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3197599A JP2520203B2 (en) | 1991-08-07 | 1991-08-07 | Sinter production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3197599A JP2520203B2 (en) | 1991-08-07 | 1991-08-07 | Sinter production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0539531A true JPH0539531A (en) | 1993-02-19 |
| JP2520203B2 JP2520203B2 (en) | 1996-07-31 |
Family
ID=16377162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3197599A Expired - Lifetime JP2520203B2 (en) | 1991-08-07 | 1991-08-07 | Sinter production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520203B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100402027B1 (en) * | 2000-12-21 | 2003-10-17 | 주식회사 포스코 | apparatus for pressing the upper material layer of sinter machine |
| US7132031B2 (en) | 2001-09-11 | 2006-11-07 | Uni-Charm Co., Ltd. | Process for making a disposable diaper |
| US7322968B2 (en) | 2002-03-22 | 2008-01-29 | Uni-Charm Co., Ltd. | Disposable wearing article and process for making the same |
| US7527617B2 (en) | 2003-10-24 | 2009-05-05 | Uni-Charm Corporation | Disposable wearing article |
| US7753900B2 (en) | 2002-03-29 | 2010-07-13 | Uni-Charm Corporation, Ltd | Disposable pull-on diaper and process for making the same |
| US7892219B2 (en) | 2001-12-17 | 2011-02-22 | Uni-Charm Co., Ltd. | Disposable wearing article provided with tape fasteners |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58148599U (en) * | 1982-03-29 | 1983-10-05 | 川崎製鉄株式会社 | Sintering machine raw material layer air permeability adjustment device |
| JPS6326094U (en) * | 1986-08-06 | 1988-02-20 |
-
1991
- 1991-08-07 JP JP3197599A patent/JP2520203B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58148599U (en) * | 1982-03-29 | 1983-10-05 | 川崎製鉄株式会社 | Sintering machine raw material layer air permeability adjustment device |
| JPS6326094U (en) * | 1986-08-06 | 1988-02-20 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100402027B1 (en) * | 2000-12-21 | 2003-10-17 | 주식회사 포스코 | apparatus for pressing the upper material layer of sinter machine |
| US7132031B2 (en) | 2001-09-11 | 2006-11-07 | Uni-Charm Co., Ltd. | Process for making a disposable diaper |
| EP2441422A1 (en) | 2001-09-11 | 2012-04-18 | Uni-Charm Co., Ltd. | Process for making a disposable diaper |
| US7892219B2 (en) | 2001-12-17 | 2011-02-22 | Uni-Charm Co., Ltd. | Disposable wearing article provided with tape fasteners |
| US7322968B2 (en) | 2002-03-22 | 2008-01-29 | Uni-Charm Co., Ltd. | Disposable wearing article and process for making the same |
| US7753900B2 (en) | 2002-03-29 | 2010-07-13 | Uni-Charm Corporation, Ltd | Disposable pull-on diaper and process for making the same |
| US7527617B2 (en) | 2003-10-24 | 2009-05-05 | Uni-Charm Corporation | Disposable wearing article |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520203B2 (en) | 1996-07-31 |
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