JPH0146626B2 - - Google Patents
Info
- Publication number
- JPH0146626B2 JPH0146626B2 JP60046264A JP4626485A JPH0146626B2 JP H0146626 B2 JPH0146626 B2 JP H0146626B2 JP 60046264 A JP60046264 A JP 60046264A JP 4626485 A JP4626485 A JP 4626485A JP H0146626 B2 JPH0146626 B2 JP H0146626B2
- Authority
- JP
- Japan
- Prior art keywords
- needle
- nonwoven fabric
- laminated web
- width direction
- fabric
- 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
Links
- 239000004745 nonwoven fabric Substances 0.000 claims description 32
- 239000000835 fiber Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000004080 punching Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002649 leather substitute Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ニードルパンチによつて不織布を製
造する方法の改善に関する。更に詳しくは、ニー
ドルパンチによつて生じる不織布の幅方向での目
付斑を解消して、均一な目付プロフイールを有す
る不織布を得るのに顕著な効果を奏する、ニード
ルパンチ不織布の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement in the method of producing nonwoven fabrics by needle punching. More specifically, the present invention relates to a method for producing a needle-punched nonwoven fabric, which is highly effective in eliminating uneven fabric weight in the width direction of the nonwoven fabric caused by needle punching and producing a nonwoven fabric with a uniform fabric weight profile.
〈従来技術〉
一般に、短繊維からなる不織布の製造において
は各種の繊維をカードで梳つて紡出し、繊維ウエ
ブを、クロスラツパーによつて、該クロスラツパ
ー下部に該クロスラツパーと直交する如く配設さ
れたコンベアー上に、数枚〜数百枚積層して積層
ウエブを形成し、さらに該ウエブに対し、圧縮・
延伸等を行なつた後、さらにニードルパンチ処理
を行なつて巻取る方法が採用されている。<Prior art> In general, in the production of nonwoven fabrics made of short fibers, various fibers are combed with cards and spun, and the fiber web is conveyed by a cross wrapper to a conveyor disposed below the cross wrapper so as to be perpendicular to the cross wrapper. Several to hundreds of sheets are laminated on top to form a laminated web, and the web is then compressed and
A method is adopted in which, after stretching and the like, a needle punching process is further performed and the film is wound up.
かかる製造工程においては、カードから紡出さ
れクロスラツパーにより積層された積層ウエブ
は、繊維が積層ウエブの幅方向、即ち、カードウ
エブの進行方向に配向しているが、ニードルパン
チを行なうことにより、該繊維はニードルのバー
ブに引掛かり垂直方向に移動する。特に表層部に
存在する繊維ほど垂直方向への移動量が多くな
り、またニードルパンチング回数が増すに従つ
て、垂直方向の繊維量が増加するものである。 In this manufacturing process, a laminated web spun from cards and laminated by a cross wrapper has fibers oriented in the width direction of the laminated web, that is, in the traveling direction of the carded web. The fibers are caught on the barb of the needle and moved vertically. In particular, the more fibers are present in the surface layer, the more they move in the vertical direction, and as the number of needle punching increases, the amount of fibers in the vertical direction increases.
そして、このとき、繊維の配向方向の平面移動
をも生じせしめ結果的に、積層ウエブの幅方向の
収縮が起るものである。そして、この幅方向の収
縮度合いは積層ウエブ幅の中央部よりも端部の方
がより大きい傾向を持つている。一方、積層ウエ
ブの長手方向即ち進行方向では、積層ウエブはニ
ードルパンチ機のデリベリーローラによつて一定
の速度で強制的に引出されてくるため、中央部と
端部では変化度合いが一定となる。このため、幅
の収縮度合いの大きい端部ほど目付が高く中央部
が低い、いわゆる幅方向で目付斑を有する不均一
な不織布となるのである。また、この現象はニー
ドルパンチ数を増加させて繊維の絡合度を多くす
るほど、また全体目付が小さい薄い不織布を製造
するときほど顕著に現われるものである。 At this time, plane movement in the orientation direction of the fibers also occurs, resulting in contraction of the laminated web in the width direction. The degree of shrinkage in the width direction tends to be larger at the ends of the laminated web width than at the center. On the other hand, in the longitudinal direction of the laminated web, that is, the traveling direction, the laminated web is forcibly pulled out at a constant speed by the delivery roller of the needle punch machine, so the degree of change is constant at the center and edges. . Therefore, the fabric weight is higher at the ends where the degree of width shrinkage is greater and the fabric weight is lower at the center, resulting in a non-uniform non-woven fabric having uneven fabric weight in the width direction. Furthermore, this phenomenon becomes more pronounced as the number of needle punches is increased to increase the degree of entanglement of fibers, or when producing a thin nonwoven fabric with a small overall basis weight.
このため、さらに高次工程でウレタン樹脂等の
樹脂を含浸させて人工皮革を製造するための基布
として使用する場合は、製品幅方向での含浸斑を
生じさせて、結果的には幅方向で強度斑や、染色
斑を生じせしめるなど、致命的な品質欠点を招く
ことになるのである。 For this reason, when using it as a base fabric for manufacturing artificial leather by impregnating it with resin such as urethane resin in a higher-level process, impregnation spots may occur in the width direction of the product, resulting in This leads to fatal quality defects such as strength spots and staining spots.
〈発明が解決しようとする問題点〉
本発明は、これらの問題点に鑑み、鋭意検討を
した結果到達し得たもので、その目的は、幅方向
に均一な目付プロフイールを有する不織布を得る
のに顕著な効果を奏する、短繊維からなるニード
ルパンチ不織布の製造方法を提供することにあ
る。<Problems to be Solved by the Invention> The present invention was achieved as a result of intensive studies in view of these problems, and its purpose is to obtain a nonwoven fabric having a uniform basis weight profile in the width direction. It is an object of the present invention to provide a method for producing a needle-punched nonwoven fabric made of short fibers, which exhibits a remarkable effect on.
すなわち、本発明では、幅方向での目付の均一
化を達成することにねらいがあり、その点、単な
る幅方向での厚みに関しての均一化をねらいとし
ているような技術（特開昭53−38769号公報）と
は、技術思想上、根本的に異なつているものであ
る。 That is, the present invention aims to achieve uniformity of the basis weight in the width direction, and in this respect, a technique (Japanese Unexamined Patent Publication No. 53-38769 The technical philosophy is fundamentally different from that of the previous publication.
〈問題点を解決するための手段〉
すなわち、本発明の不織布の製造方法は、ニー
ドルパンチ法により短繊維不織布を形成するに際
し、積層ウエブまたは不織布の両端部を中央部に
対するよりも強く圧縮して該両端部の厚さが薄い
状態下でニードルパンチを施すことにより、該両
端部における幅方向収縮が、該圧縮を行なわない
ときよりも抑止されてニードルパンチ処理がなさ
れるように構成したことを特徴とするニードルパ
ンチ不織布の製造方法である。<Means for Solving the Problems> In other words, the method for producing a nonwoven fabric of the present invention involves compressing both ends of the laminated web or nonwoven fabric more strongly than the center when forming a short fiber nonwoven fabric by the needle punch method. By performing needle punching under a condition where the thickness of both ends is thin, shrinkage in the width direction at both ends is suppressed compared to when the compression is not performed, and the needle punching process is performed. This is a method for manufacturing a needle-punched nonwoven fabric.
〈作用〉
以下、本発明について、実施態様例を示した図
面等を用いて、さらに詳細に説明する。<Operation> The present invention will be described in more detail below with reference to drawings showing embodiment examples.
第１図は、本発明の一実施態様を示す工程概略
図であり、同図において、１は積層ウエブであ
り、カードから紡出されたウエブをクロスラツパ
ーによつて数枚〜数百枚積層したので、搬送コン
ベアー２により搬送される。３は本発明の製造方
法において特に用いられるプレス装置であり、該
プレス装置３により積層ウエブの両端部が中央部
に対するよりも強く圧縮され、厚みが薄い状態に
された後、該ウエブはニードルパンチ機４に導か
れる。５は積層ウエブをニツプしながら搬送する
ための一対のデリベリーローラであり、前記プレ
ス装置３とともにニードルパンチ機から強制駆動
されているものである。６はニードルパンチ処理
を施された不織布の巻取機である。なお、ニード
ルパンチ本数に応じて、パンチ機及びプレス装置
の台数を適宜増減させてもよいし、あるいはまた
積層ウエブのパンチ機速度に対する送り速度を調
節してもよいが、ニードルパンチ本数を多くする
場合は前者の方がプレス回数が増えるため効果が
大きくなり望ましい。 FIG. 1 is a process schematic diagram showing one embodiment of the present invention. In the figure, 1 is a laminated web, in which several to several hundred webs spun from cards are laminated by a cross wrapper. Therefore, it is transported by the transport conveyor 2. Reference numeral 3 denotes a press device particularly used in the manufacturing method of the present invention, and after the press device 3 compresses both ends of the laminated web more strongly than the center to reduce the thickness, the web is needle punched. You will be guided to machine 4. Reference numeral 5 denotes a pair of delivery rollers for transporting the laminated web while nipping it, and these rollers are forcibly driven together with the press device 3 from a needle punch machine. 6 is a winding machine for a nonwoven fabric subjected to a needle punching process. Note that depending on the number of needle punches, the number of punch machines and press devices may be increased or decreased as appropriate, or the feed speed of the laminated web relative to the speed of the punch machine may be adjusted, but if the number of needle punches is increased, In this case, the former is preferable because the number of presses increases and the effect is greater.
第２図、第３図は、第１図におけるプレス装置
付近を示す要部概略図であり、第２図は要部斜視
図、第３図は要部正面図である。これらの図にお
いて、７は受ローラであり、８は積層ウエブの両
端部をプレスするための段付のニツプローラ、９
は該ニツプローラを上下させるためのエアーシリ
ンダである。 2 and 3 are schematic views of the main parts showing the vicinity of the press device in FIG. 1, FIG. 2 is a perspective view of the main parts, and FIG. 3 is a front view of the main parts. In these figures, 7 is a receiving roller, 8 is a stepped nip roller for pressing both ends of the laminated web, and 9 is a nip roller with a step for pressing both ends of the laminated web.
is an air cylinder for raising and lowering the nip roller.
なお、前記ニツプローラ８の形状は、中央部に
対し、両端のローラ径を大きくした形状のもので
も、または第４図の８′のように中央部から端に
向つて除々にローラ直径が大きくなつているもの
や、第５図の１０，１０′の如く積層ウエブの両
端部にのみ作用する如く装備したものであつても
よいが、いずれにしろ、本発明者らの知見によれ
ば、圧縮力は該ニツプローラの長さ１cm当り数キ
ログラム〜数十キログラム作用させることが肝要
である。 The shape of the nip roller 8 may be such that the roller diameter at both ends is larger than that at the center, or the roller diameter may gradually increase from the center to the ends as shown in 8' in Fig. 4. However, according to the knowledge of the present inventors, compression It is important to apply a force of several kilograms to several tens of kilograms per centimeter of the length of the nip roller.
また、圧縮長さ（幅）は、ニードルパンチ本数
や繊維の種類によつても異なるが、一般には、積
層ウエブ幅が２ｍ前後の場合、両端部それぞれ20
cm〜50cmくらいが好ましいものである。 In addition, the compressed length (width) varies depending on the number of needle punches and the type of fiber, but in general, when the width of the laminated web is around 2 m, the compressed length (width) is 20 mm at each end.
cm to about 50 cm is preferable.
なお、本発明において積層ウエブの端部を圧縮
することによつて達成される目付斑抑止理由につ
いて、第７図ａ，ｂを用いて説明をすると、第７
図ａにおいて、積層ウエブの表層部の水平方向繊
維１１は、ニードル１２の上下運動により、該ニ
ードルのバーブ１３に引掛けられて１１′の如く
垂直方向に移動させられるが、このとき繊維１１
は同時に矢印イ，ロ方向にも移動することにな
る。つまり、この繰返しにより、垂直方向の繊維
１１′がだんだんと増えて、水平方向の繊維１１
と結合して、厚みが徐々に薄くなり、同時に水平
方向の繊維１１の配列方向に縮んで、積層ウエブ
の繊維密度が高くなつて、不織布が形成されるの
であるが、このとき、第７図ｂに示す如く、ロー
ラ等により圧縮を施された積層ウエブは厚みが薄
く繊維密度が高くなつており、この状態でニード
ルパンチすると、圧縮がない場合に比べ、繊維移
動抵抗が増え、また積層ウエブ表層部の移動距離
が短いために、結果として積層ウエブの水平繊維
の配列方向、即ち、積層ウエブの幅方向の収縮が
抑止されると考えられるものである。従つて積層
ウエブの端部のみに圧縮を施した場合、中央部に
比べ端部の厚みが薄く、繊維密度が上がるため、
端部に幅収縮の抑止効果が発現するのである。 The reason for suppressing eye spots, which is achieved by compressing the end portions of the laminated web in the present invention, will be explained using FIGS. 7a and 7b.
In Figure a, the horizontal fibers 11 in the surface layer of the laminated web are caught by the barb 13 of the needle and moved vertically as indicated by 11' by the vertical movement of the needle 12;
will also move in the directions of arrows A and B at the same time. In other words, by repeating this process, the number of vertical fibers 11' gradually increases, and the number of horizontal fibers 11' increases.
As a result, the thickness gradually decreases, and at the same time, the fibers 11 shrink in the horizontal direction, increasing the fiber density of the laminated web and forming a nonwoven fabric. As shown in b, the laminated web that has been compressed by rollers etc. is thin and has a high fiber density, and when needle punched in this state, the fiber movement resistance increases compared to when there is no compression, and the laminated web Since the moving distance of the surface layer portion is short, it is thought that as a result, shrinkage in the direction in which the horizontal fibers of the laminated web are arranged, that is, in the width direction of the laminated web, is suppressed. Therefore, if compression is applied only to the edges of a laminated web, the thickness of the edges will be thinner than the center, and the fiber density will increase.
The effect of suppressing width shrinkage appears at the ends.
一般に幅方向にフラツトな厚み、目付を有する
積層ウエブにニードルパンチを施した場合は、上
述した理由により幅方向で凹型の目付分布をした
不織布となるが、適度な条件で端部を圧縮するこ
とにより、端部の幅収縮率が中央部と同程度とな
り、結果として幅方向に均一な目付分布を有する
不織布が得られるのである。 Generally, when needle punching is applied to a laminated web having a flat thickness and basis weight in the width direction, the result is a nonwoven fabric with a concave basis weight distribution in the width direction due to the above-mentioned reasons, but it is necessary to compress the edges under appropriate conditions. As a result, the width shrinkage rate of the end portions becomes approximately the same as that of the center portion, and as a result, a nonwoven fabric having a uniform basis weight distribution in the width direction is obtained.
本発明では、このようにして目付を均一化させ
る結果、むしろ、不織布の厚みとしては一般に必
然的に均一にならないものであつて、厚みを均一
にせんとする技術とは全く相異しているものなの
である。 In the present invention, as a result of making the basis weight uniform in this way, the thickness of the nonwoven fabric is generally inevitably not uniform, which is completely different from the technology that attempts to make the thickness uniform. It is a thing.
〈実施例〉 以下の本発明の実施例をあげて説明する。<Example> The following examples of the present invention will be described.
実施例 １
繊維長51mm、繊度3.0デニールの、ポリスチレ
ン及びポリエステルからなる海島型複合繊維をカ
ードで紡出し、目付18ｇ／m2のウエブをクロスラ
ツパーで2.2ｍ幅で50枚積層したものに、不織布
単位面積当り100本／cm2のニードルパンチを施し、
目付700ｇ／m2とした後、本発明の方法にかかる
プレス装置で、両端各50cmに１cm長さ当り10キロ
グラムの線圧力を加えた後、再びニードルパンチ
を重ねて不織布単位面積当り200本／cm2を追加し、
さらに３回繰返しを行ない、不織布単位面積当り
合計900本／cm2を施し、目付600ｇ／m2、幅2.0ｍ
の人工皮革用基布の不織布を得た。Example 1 A sea-island composite fiber made of polystyrene and polyester with a fiber length of 51 mm and a fineness of 3.0 denier is spun with a card, and 50 webs with a fabric weight of 18 g/m 2 are laminated with a width of 2.2 m using a cross wrapper, and a nonwoven fabric unit is formed. Needle punch 100 needles/ cm2 per area,
After obtaining a fabric weight of 700 g/m 2 , a linear pressure of 10 kg per 1 cm length was applied to each 50 cm of both ends using a press device according to the method of the present invention, and then needle punching was repeated again to produce 200 pieces per unit area of the nonwoven fabric. add cm 2 ,
Repeat this process three more times to obtain a total of 900 pieces/cm 2 per unit area of the nonwoven fabric, resulting in a fabric weight of 600 g/m 2 and a width of 2.0 m.
A nonwoven fabric as a base fabric for artificial leather was obtained.
この不織布の幅方向の目付分布は、第６図の実
線で示す如く、フラツトに近く、目付斑はＲ＝20
ｇ／m2と、破線で示した端部の圧縮を施さない従
来方式の目付斑Ｒ＝50ｇ／m2に比べ、著しく改善
された不織布が得られた。 The fabric weight distribution in the width direction of this nonwoven fabric is nearly flat, as shown by the solid line in Figure 6, and the fabric weight unevenness is R = 20.
g/m 2 , and a nonwoven fabric was obtained which was significantly improved compared to the conventional method in which the end portions were not compressed and had a density unevenness R of 50 g/m 2 as shown by the broken line.
〈発明の効果〉
本発明のニードルパンチ不織布の製造方法は、
上述した如く、短繊維をカードで紡出し、クロス
ラツパーで積層した後ニードルパンチを施すこと
により不織布を製造する際に従来は必然的に生じ
ていた製品幅方向での目付斑を解消し、幅方向で
の目付斑が著しく改善された人工皮革用基布不織
布を得る上で極めて有効なものであり、合成皮革
の品質向上に大きく寄与するものである。<Effects of the Invention> The method for producing a needle-punched nonwoven fabric of the present invention includes:
As mentioned above, short fibers are spun using cards, laminated using a cross wrapper, and then needle punched. This eliminates the unevenness in the fabric weight in the width direction of the product that conventionally occurs when manufacturing nonwoven fabrics. This method is extremely effective in obtaining a base fabric nonwoven fabric for artificial leather with markedly improved basis weight unevenness, and greatly contributes to improving the quality of synthetic leather.
第１図は、本発明の一実施態様例を示す工程概
略図、第２図はその要部を示す斜視図、第３図は
同じくその要部を示す正面図である。第４図、第
５図は、本発明の他の実施態様を示す説明図であ
る。第６図は本発明によつて生産された不織布の
幅方向の目付斑の１例データを示す説明図であ
る。第７図ａ，ｂは積層ウエブの絡合状態を示す
断面モデル図であり、本発明方法が幅方向に均一
な厚さを有する不織布を得る上で効果的な理由を
説明するためのものである。
１：積層ウエブ、２：搬送コンベアー、３：プ
レス装置、４：ニードルパンチ機、５：デリベリ
ーローラ、６：巻取機、７：受ローラ、８：段付
のニツプローラ、１２：ニードル。
FIG. 1 is a process schematic diagram showing one embodiment of the present invention, FIG. 2 is a perspective view showing the main part thereof, and FIG. 3 is a front view showing the main part. FIGS. 4 and 5 are explanatory diagrams showing other embodiments of the present invention. FIG. 6 is an explanatory diagram showing data on an example of unevenness in the width direction of a nonwoven fabric produced according to the present invention. Figures 7a and 7b are cross-sectional model diagrams showing the entangled state of the laminated web, and are intended to explain why the method of the present invention is effective in obtaining a nonwoven fabric having a uniform thickness in the width direction. be. 1: Laminated web, 2: Conveyor, 3: Press device, 4: Needle punch machine, 5: Delivery roller, 6: Winder, 7: Receiving roller, 8: Stepped roller, 12: Needle.
Claims (1)
するに際し、積層ウエブまたは不織布の両端部を
中央部に対するよりも強く圧縮して該両端部の厚
さが薄い状態下でニードルパンチを施すことによ
り、該両端部における幅方向収縮が、該圧縮を行
なわないときよりも抑止されてニードルパンチ処
理がなされるように構成したことを特徴とするニ
ードルパンチ不織布の製造方法。1. When forming a short fiber nonwoven fabric by the needle punch method, both ends of the laminated web or nonwoven fabric are compressed more strongly than the center part, and needle punching is performed under a condition where the thickness of both ends is thin. 1. A method for manufacturing a needle-punched nonwoven fabric, characterized in that the needle-punching treatment is performed with shrinkage in the width direction in the portion being suppressed more than when the compression is not performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60046264A JPS61207654A (en) | 1985-03-07 | 1985-03-07 | Production of needle punched nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60046264A JPS61207654A (en) | 1985-03-07 | 1985-03-07 | Production of needle punched nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61207654A JPS61207654A (en) | 1986-09-16 |
| JPH0146626B2 true JPH0146626B2 (en) | 1989-10-09 |
Family
ID=12742349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60046264A Granted JPS61207654A (en) | 1985-03-07 | 1985-03-07 | Production of needle punched nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61207654A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007290174A (en) * | 2006-04-21 | 2007-11-08 | Inoac Corp | Waste ink absorber and its manufacturing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6385661U (en) * | 1986-11-20 | 1988-06-04 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5338769A (en) * | 1976-09-15 | 1978-04-10 | Phillips Petroleum Co | Method and apparatus for manufacturing uniform thickness of unwoven fabric |
-
1985
- 1985-03-07 JP JP60046264A patent/JPS61207654A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5338769A (en) * | 1976-09-15 | 1978-04-10 | Phillips Petroleum Co | Method and apparatus for manufacturing uniform thickness of unwoven fabric |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007290174A (en) * | 2006-04-21 | 2007-11-08 | Inoac Corp | Waste ink absorber and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61207654A (en) | 1986-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |