JP4303834B2 - Low dust generation wiper - Google Patents

Low dust generation wiper Download PDF

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Publication number
JP4303834B2
JP4303834B2 JP15470999A JP15470999A JP4303834B2 JP 4303834 B2 JP4303834 B2 JP 4303834B2 JP 15470999 A JP15470999 A JP 15470999A JP 15470999 A JP15470999 A JP 15470999A JP 4303834 B2 JP4303834 B2 JP 4303834B2
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Japan
Prior art keywords
wiper
nonwoven fabric
folded
cut
dust generation
Prior art date
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Expired - Fee Related
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JP15470999A
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Japanese (ja)
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JP2000342500A (en
Inventor
武美 山本
智 秋田
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Kuraray Co Ltd
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Kuraray Co Ltd
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Priority to JP15470999A priority Critical patent/JP4303834B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は低発塵性ワイパーに関する。更に詳しくは実質的に無塵状態に管理されたクリーンルーム内での拭き取り工程に好適に使用可能な低発塵性ワイパーに関する。
【0002】
【従来の技術】
近年、精密工業、半導体、医薬品、食品等の製造工程、病院や微生物を扱う分野等、クリーンルーム内で行われる作業が増えてきており、ここで使われるクリーンルーム用ワイパーの必要性が増大している。ここで使われているワイパーは、短繊維の綿・合繊及び長繊維合繊からなる不織布、織物、編物等があるが、未だ満足出来るものはない。
例えば、長繊維合繊を使ったワイパーは吸水性が悪く拭き取り性が悪いという欠点がある。短繊維を使ったワイパーは吸水性は良いが発塵性が悪いという欠点を持っている。織物は厚みが薄く、伸縮性がなく拭き取り面にフィットしにくいので、拭き取り性に劣る。これらのワイパーは織物、編物も含め、最終の使用段階では切断が必要となり、切断面からのリント(微少な繊維屑を主体とする微紛)発生が大きな欠点となる。この為、切断面を熱可塑性樹脂で固めたり、縁取り材で包み込んだり、編み込んでしまったりと色々と考案されているが未だ満足出来るものはない。
【0003】
【発明が解決しようとする課題】
本発明の目的は、短繊維不織布からなり、切断端からのリントの発生が極めて少ない安価な低発塵性ワイパーを提供することである。
【0004】
【課題を解決するための手段】
すなわち、本発明は、短繊維からなる、折りたたみ構造を有する不織布製ワイパーであって、該ワイパーの1辺にのみ不織布の切断端が現れていることを特徴とする低発塵性ワイパーであり、好ましくは、該ワイパーをJIS B9923タンブンリグ法により発塵させ、パーティクルカウンターで測定したときの0.1〜0.5μmの発塵個数が1000個以下、かつ0.5μm以上の発塵個数が1500個以下である低発塵性ワイパーである。また、本発明は、短繊維からなる不織布を折り畳んで低発塵性ワイパーを製造する方法であって、帯状不織布の相対する切断端A,Bを該不織布の同一面側に折り畳み、次いで、該折り畳まれた帯状不織布を切断端A,Bに略直交する方向に所定間隔で切断し、切断により生ずるリントを吸引除去し、該切断された折り畳み不織布を切断端A,Bが内側にくるように折り畳むことを特徴とする低発塵性ワイパーの製造方法である。
【0005】
【発明の実施の形態】
本発明のワイパーは、特殊な折り畳み構造を採用することにより、リントの発生しやすい短繊維不織布の切断端がワイパーの1辺にしか現れず、優れた低発塵性を奏するものである。図1は本発明のワイパーの1例を示す外観図であり、図2はその展開図である。本発明のワイパーは切断端C,Dだけがワイパーの1辺にのみ現れており、切断端A,Bはワイパー内部に隠れているため、外部からの刺激が少なく発塵も少ない。また、切断端A,Bからリントが発生してもリントは外部へ殆ど出てこないという特徴を有している。
【0006】
一方、図3に、従来のクリーンルーム用の短繊維不織布ワイパーの外観図を、また図4にその展開図を示したが、該ワイパーにおいては、不織布の切断端A,B,C及びDの全てが外側に現れているため、これら切断端からのリント発生がかなり多い。
【0007】
本発明のワイパーは、その1辺にのみ切断端が現われていれば、その形状は特に限定されず、三角形;正方形、長方形、平行四辺形などの矩形形状;その他種々の形態のワイパーとすることが可能ではあるが、折り畳みやすさや原反となる不織布の準備の容易さからすると正方形や長方形などの矩形形状であることが現実的で好ましい。
【0008】
本発明のワイパーの製造方法について、例えば、矩形形状のワイパーの例を挙げて説明すると、短繊維からなる帯状不織布の相対する切断端A,Bを該不織布の同一面側に折り畳み、次いで、該折り畳まれた帯状不織布を切断端A,Bに略直交する方向に所定間隔で切断し、切断により生ずるリントを吸引除去し、該切断された折り畳み不織布を切断端A,Bが最終製品の内側にくるように折り畳むことによって製造することができる。
【0009】
図5に本発明のワイパーを製造するための製造工程の該略図を例示したが、まず、原反ロール5から引き出された帯状不織布は折り板6で折られる。ここで折られた帯状不織布は、図6に示したX-X矢視断面のように、平たく潰されたC字形状のように折り畳まれており、切断端A,Bは該不織布の同一面側に折りこまれている。次いで、折り畳まれた帯状不織布はカッティングロール7などの切断手段で所望の間隔に切断され、切断端C,Dから生ずるリントを、切断と同時又は切断後に真空吸引装置により吸引除去し、さらに該切断された折り畳み不織布を切断端A,Bが最終製品において内側にくるようにホールディングロール8によって折り畳むことによって1辺にのみ切断端が現れる折り畳み構造を有するワイパーが製造されるのである。ワイパーは任意枚数に重ねられ、搬出コンベヤー11上に取り出され、任意枚数に重ねられた製品15はその後検査、包装されて出荷される。
【0010】
ここで使用される製造設備は従来製品の4つ折り製品を製造するための設備を用いることができる。このC型に折る折り板は、封筒型の製品、水切り袋等の加工に使用されているものを使うことができる。
【0011】
本発明のワイパーは、一般的な折り畳み加工方法の組み合わせにより安価に製造できるが、従来品に比して飛躍的に低発塵性が改善される点に最大の特徴がある。すなわち、本発明の短繊維不織布からなるワイパーをJIS B9923タンブンリグ法により発塵させ、パーティクルカウンターで測定した場合に、0.1〜0.5μmの大きさの発塵個数が1000個以下、かつ0.5μm以上の大きさの発塵個数が1500個以下という極めて優れた低発塵性を示すものであり、これは、特定の折り畳み構造と、切断時に行なう真空吸引処理の相乗効果として現れるものである。発塵個数が上記の範囲を外れる場合は、クリーンルーム用のワイパーとして不適である。
【0012】
【実施例】
以下、実施例により本発明を具体的に説明するが、本発明は何らこれらに限定されるものではない。
【0013】
実施例1 及び比較例1
1.5dr×繊維長40mmのレイヨン80%と2.0dr×繊維長51mmの熱融着複合繊維20%の原綿構成で、目付けが30g/m2である帯状不織布原反を用い、図5に示すような製造装置を用いて、1辺が25cm×25cmの矩形形状で、その1辺にのみ切断端が現れている折り畳まれたワイパーを作成し、JIS B‐9923(クリーンルーム用衣服の汚染粒子測定方法)タンブリング法により発塵し、パーティクルカウンターで発塵個数を測定した。尚、測定は5回測定し、その平均値を示す。また、比較のために、上記と同じ不織布からなり、図3に見られるような折り方をした1辺が25cmの矩形形状のワイパーを作成し、上記と同様にして発塵個数を測定した。両者の測定結果を表1に示す。
【0014】
【表1】

Figure 0004303834
【0015】
実施例2及び比較例2
不織布として、1.5dr×繊維長40mmのレイヨン100%の原綿構成で、目付が30g/m2であるものを使用すること以外は、実施例1及び比較例1と同様にしてワイパーを作成し、発塵個数を測定した。結果を表2に示す。
【0016】
【表2】
Figure 0004303834
【0017】
表1及び表2に見られる通り、実施例1及び実施例2は比較例に比べて約8分の1から18分の1と極めて低発塵性となっており、本発明のワイパーは極めて優れた低発塵性を具備するものであることが分かる。
【図面の簡単な説明】
【図1】本発明のワイパーの斜視図
【図2】本発明のワイパーの展開図
【図3】従来のワイパーの斜視図
【図4】従来のワイパーの展開図
【図5】本発明のワイパーの製造装置の概略図
【図6】製造工程における帯状不織布のX−X矢視断面図
【符号の説明】
A,B,C,D:不織布の切断端
1,2,3,4:折り目
5:原反ロール
6:折り板
7:カッティングロール
8:ホールディングロール
9:真空吸引パイプ
10:折り畳み製品
11:搬出コンベヤー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a low dust generating wiper. More specifically, the present invention relates to a low dust-generating wiper that can be suitably used in a wiping process in a clean room that is managed in a substantially dust-free state.
[0002]
[Prior art]
In recent years, there has been an increase in the number of operations performed in clean rooms, such as manufacturing processes for precision industries, semiconductors, pharmaceuticals, foods, hospitals and microorganisms, and the need for clean room wipers is increasing. . The wipers used here include non-woven fabrics, woven fabrics, and knitted fabrics made of short-fiber cotton / synthetic fibers and long-fiber synthetic fibers, but none are satisfactory.
For example, a wiper using long fiber synthetic fiber has a drawback of poor water absorption and poor wiping property. A wiper using short fibers has a drawback of good water absorption but poor dust generation. The woven fabric is thin, has no elasticity, and is difficult to fit on the wiping surface, so that the wiping property is inferior. These wipers, including woven fabrics and knitted fabrics, need to be cut at the final use stage, and the occurrence of lint from the cut surface (fine powder consisting mainly of fine fiber waste) is a major drawback. For this reason, various methods have been devised, such as hardening the cut surface with a thermoplastic resin, wrapping it with a border material, or knitting it, but nothing is satisfactory yet.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide an inexpensive low-dusting wiper that is made of a short fiber nonwoven fabric and generates very little lint from the cut end.
[0004]
[Means for Solving the Problems]
That is, the present invention is a non-woven wiper having a folding structure made of short fibers, wherein the non-woven wiper appears only on one side of the wiper, Preferably, the wiper is dusted by the JIS B9923 tambun rig method, and the number of dust particles of 0.1 to 0.5 μm when measured with a particle counter is 1000 or less, and the number of dust particles of 0.5 μm or more is 1500 or less. It is a dust-generating wiper. Further, the present invention is a method for producing a wiper with low dust generation by folding a nonwoven fabric composed of short fibers, wherein the opposite cut ends A and B of the belt-like nonwoven fabric are folded on the same surface side of the nonwoven fabric, Cut the folded non-woven fabric at a predetermined interval in a direction substantially perpendicular to the cutting ends A and B, suck and remove the lint produced by the cutting, so that the cutting ends A and B come inside. It is a manufacturing method of the low dust generation wiper characterized by folding.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The wiper of the present invention employs a special folding structure, so that the cut end of the short fiber nonwoven fabric that is liable to generate lint appears only on one side of the wiper, and exhibits excellent low dust generation. FIG. 1 is an external view showing an example of the wiper of the present invention, and FIG. 2 is a developed view thereof. In the wiper of the present invention, only the cutting ends C and D appear only on one side of the wiper, and the cutting ends A and B are hidden inside the wiper, so that external stimulation is small and dust generation is small. Further, even if lint is generated from the cut ends A and B, the lint hardly comes out to the outside.
[0006]
Meanwhile, FIG. 3 shows an external view of a conventional short fiber nonwoven wiper for a clean room, and FIG. 4 shows a developed view thereof. In the wiper, all of the cut ends A, B, C and D of the nonwoven fabric are shown. Appears on the outside, so there is a considerable amount of lint from these cut ends.
[0007]
The shape of the wiper of the present invention is not particularly limited as long as a cut end appears only on one side thereof. Triangle; rectangular shape such as square, rectangle, parallelogram; and other various types of wipers. However, it is realistic and preferable that the shape is rectangular such as a square or a rectangle from the viewpoint of easy folding and easy preparation of a nonwoven fabric to be a raw fabric.
[0008]
The method for producing the wiper of the present invention will be described by taking, for example, an example of a rectangular wiper. Folding the cut ends A and B of a strip-shaped nonwoven fabric made of short fibers on the same surface side of the nonwoven fabric, Cut the folded strip nonwoven fabric at predetermined intervals in a direction substantially orthogonal to the cutting ends A and B, suck and remove the lint produced by the cutting, and place the cut folded nonwoven fabric on the inside of the final product. It can be manufactured by folding it into a shape.
[0009]
FIG. 5 illustrates the schematic diagram of the manufacturing process for manufacturing the wiper of the present invention. First, the belt-shaped nonwoven fabric drawn from the raw fabric roll 5 is folded by the folding plate 6. The folded belt-like non-woven fabric is folded like a flattened C-shape as shown in the cross section taken along the line XX shown in FIG. 6, and the cut ends A and B are on the same surface of the non-woven fabric. Folded to the side. Next, the folded non-woven fabric is cut at a desired interval by a cutting means such as a cutting roll 7, and the lint produced from the cut ends C and D is removed by suction with a vacuum suction device at the same time as or after the cutting. The folded nonwoven fabric is folded by the holding roll 8 so that the cut ends A and B are on the inner side of the final product, whereby a wiper having a folded structure in which the cut end appears only on one side is manufactured. An arbitrary number of wipers are stacked, taken out on the carry-out conveyor 11, and the product 15 stacked in an arbitrary number is then inspected, packaged and shipped.
[0010]
The manufacturing equipment used here may be equipment for manufacturing a conventional four-fold product. As the folded plate that is folded into the C shape, those used for processing of envelope-type products, draining bags, and the like can be used.
[0011]
The wiper of the present invention can be manufactured at a low cost by a combination of general folding processing methods, but has the greatest feature in that the low dust generation is dramatically improved as compared with the conventional product. That is, when the wiper made of the short fiber nonwoven fabric of the present invention is dusted by the JIS B9923 tambun rig method and measured with a particle counter, the number of dust particles having a size of 0.1 to 0.5 μm is 1000 or less and 0.5 μm or more. It exhibits extremely low dust generation such that the number of generated dust particles is 1500 or less, and this appears as a synergistic effect of the specific folding structure and the vacuum suction treatment performed at the time of cutting. When the number of dust generation is out of the above range, it is not suitable as a wiper for a clean room.
[0012]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these at all.
[0013]
Example 1 and Comparative Example 1
As shown in Fig. 5, using a raw material of strip nonwoven fabric with a weight of 30 g / m 2 and a raw cotton composition of 1.5% x fiber length 40% rayon 80% and 2.0dr x fiber length 51mm heat fusion composite fiber 20% A folded wiper with a rectangular shape measuring 25cm x 25cm on one side and with a cut edge appearing only on one side using a simple manufacturing device. JIS B-9923 (Measurement method for contaminant particles in cleanroom clothing) ) Dust was generated by the tumbling method, and the number of particles was measured with a particle counter. In addition, a measurement is measured 5 times and shows the average value. For comparison, a rectangular wiper made of the same non-woven fabric as described above and folded as shown in FIG. 3 and having a side of 25 cm was prepared, and the number of dust generation was measured in the same manner as described above. Both measurement results are shown in Table 1.
[0014]
[Table 1]
Figure 0004303834
[0015]
Example 2 and Comparative Example 2
As a non-woven fabric, a wiper was prepared in the same manner as in Example 1 and Comparative Example 1 except that a non-woven fabric composed of 100% rayon of 1.5dr × fiber length of 40 mm and having a basis weight of 30 g / m 2 was used. The number of dust generation was measured. The results are shown in Table 2.
[0016]
[Table 2]
Figure 0004303834
[0017]
As can be seen in Tables 1 and 2, Example 1 and Example 2 are extremely low dust generation, about 1/8 to 1/18 of the comparative example, and the wiper of the present invention is extremely low. It turns out that it has the outstanding low dust generation property.
[Brief description of the drawings]
1 is a perspective view of a wiper of the present invention. FIG. 2 is a developed view of a wiper of the present invention. FIG. 3 is a perspective view of a conventional wiper. FIG. 4 is a developed view of a conventional wiper. Schematic diagram of the manufacturing equipment of [Fig. 6] XX cross-sectional view of the strip-shaped nonwoven fabric in the manufacturing process [Explanation of symbols]
A, B, C, D: Cut end 1, 2, 3, 4 of nonwoven fabric: Fold 5: Original fabric roll 6: Folding plate 7: Cutting roll 8: Holding roll 9: Vacuum suction pipe 10: Folded product 11: Unloading conveyor

Claims (6)

短繊維からなる、折りたたみ構造を有する不織布製ワイパーであって、帯状不織布の相対する切断端A,Bが該不織布の同一面側に折り畳まれ、次いで、該折り畳まれた帯状不織布を切断端A,Bに略直交する方向に所定間隔で切断され、該切断された折り畳み不織布を切断端A,Bが内側にくるように折り畳まれていることを特徴とし、更に該ワイパーの1辺にのみ不織布の切断端が現れていることを特徴とする低発塵性ワイパー。A non-woven wiper made of short fibers and having a folded structure, wherein the opposite cut ends A and B of the belt-like nonwoven fabric are folded on the same surface side of the nonwoven fabric, and then the folded belt-like nonwoven fabric is cut at the cut ends A, It is cut at a predetermined interval in a direction substantially perpendicular to B, and the folded folded nonwoven fabric is folded so that the cut ends A and B are on the inside, and further , the nonwoven fabric is formed only on one side of the wiper. A low dust-generating wiper characterized by the appearance of cut edges. 厚みが均一である請求項1に記載の低発塵性ワイパー。  The low dust-generating wiper according to claim 1, which has a uniform thickness. JIS B9923タンブンリグ法により発塵させ、パーティクルカウンターで測定したときの0.1〜0.5μmの発塵個数が1000個以下、かつ0.5μm以上の発塵個数が1500個以下である請求項1又は2に記載の低発塵性ワイパー。  3. The dust generation number of 0.1 to 0.5 μm is 1000 or less and the number of dust generation of 0.5 μm or more is 1500 or less when measured with a particle counter by dust generation by the JIS B9923 tambun rig method. Low dust generation wiper. 矩形形状である請求項1乃至3のいずれか1項に記載のワイパー。  The wiper according to any one of claims 1 to 3, which has a rectangular shape. クリーンルーム用である請求項1乃至4のいずれか1項に記載のワイパー。  The wiper according to any one of claims 1 to 4, which is for a clean room. 短繊維からなる不織布を折り畳んで低発塵性ワイパーを製造する方法であって、帯状不織布の相対する切断端A,Bを該不織布の同一面側に折り畳み、次いで、該折り畳まれた帯状不織布を切断端A,Bに略直交する方向に所定間隔で切断し、切断により生ずるリントを吸引除去し、該切断された折り畳み不織布を切断端A,Bが内側にくるように折り畳むことを特徴とする低発塵性ワイパーの製造方法。  A method for producing a low dust-generating wiper by folding a nonwoven fabric comprising short fibers, wherein the opposing cut ends A and B of the belt-like nonwoven fabric are folded on the same side of the nonwoven fabric, and then the folded belt-like nonwoven fabric is Cut at predetermined intervals in a direction substantially perpendicular to the cutting ends A and B, suck and remove the lint produced by the cutting, and fold the folded nonwoven fabric so that the cutting ends A and B are inside A method for producing a low dust generating wiper.
JP15470999A 1999-06-02 1999-06-02 Low dust generation wiper Expired - Fee Related JP4303834B2 (en)

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JP2017115262A (en) * 2015-12-24 2017-06-29 日本製紙クレシア株式会社 Method for producing nonwoven fabric sheet

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