JP2005143523A - Low dust generation characteristic wiper and working method of low dust generation characteristic wiper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low dust generation characteristic wiper for which the spun lace of lyocell fibers is original fabric and fiber falling from a cut surface is suppressed to a low level at the time of cutting the original fabric into a prescribed size while taking usability of the fabric into consideration. <P>SOLUTION: For the low dust generation characteristic wiper, spun lace nonwoven fabric obtained by hydroentangling the lyocell fibers is used as the original fabric, the original fabric is cut into the prescribed size by shear cutting or score cutting, and the cut original fabric is turned to a wiper product by being folded or without being folded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a low dust-generating wiper intended for industrial wiping products and a processing method thereof.

In the field of precision parts manufacturing such as lens manufacturers and semiconductors, fine dust has a great impact on product quality, and therefore low dust generation wiping products are desired.
In this field, there are non-woven wipes using rayon non-woven wipes and “lyocell” fibers, which are solvent-spun cellulose, but have not reached a satisfactory level of dust generation.

Japanese Patent Laid-Open No. 10-37059 JP 2000-342500 A

  The problem to be solved is that the lyocell fiber spunlace is used as a raw fabric, and when this raw fabric is cut into a predetermined size in consideration of ease of use, the fiber dropout from the cut surface is suppressed to a low level and low generation occurs. It is to realize a dusty wiper.

  The present invention uses a spun lace nonwoven fabric obtained by hydroentanglement of lyocell fibers as a raw fabric, cuts the raw fabric into a predetermined size by shear cutting or score cutting, and folds or folds the cutting raw fabric. The present invention provides a low dust-generating wiper characterized by being a wiper product or a processing method thereof.

  Further, the present invention provides a low dust-generating wiper in which the raw material of cutting is C-fold × half-fold or C-fold × C-fold or C-fold × C-fold × half-fold to reduce the exposure at the peripheral edge of the wiper product. The processing method is provided.

  Furthermore, the present invention provides a low dust-generating wiper that removes dust generated by cutting the original fabric and / or folding the original fabric by vacuum suction, or a processing method thereof.

Embodiments of the present invention are listed below as follows.
A spunlace nonwoven fabric obtained by hydroentanglement of lyocell fibers with high single yarn strength and low generation of dust due to falling off of soft cells in fibers and fiber breakage is used as a raw fabric.
In consideration of ease of use, the raw material is cut into a predetermined size. In this case, cutting by the band saw method is suitable for high-speed production. It is not suitable because many fiber dropouts of 2 μm or more occur, and it is cut by shear cut or score cut.
Such wiping products are overwhelmingly often used while folded. At this time, in the normal four-fold type, all the slit surfaces are exposed at the peripheral edge of the product, and the fibers are likely to fall off due to the load. As a preferred folding form, C-fold × half-fold, further C-fold × C-fold or C-fold × C-fold × half-fold can suppress exposure of all cut surfaces.
In the folding process, damaged fibers are easily generated due to friction between the folded plate and the original fabric. Further, in the cutting process, the fibers are often dropped from the cut portion, and therefore dust generated in these processes is removed by a method such as vacuum suction. In particular, generation of dust of less than 2 μm can be suppressed.

  In the cutting step, score cutting or shear cutting is performed without using a band saw, and at the same time, particularly fine dust is removed by suction under reduced pressure, thereby obtaining a wiper with extremely low dust generation.

  Examples of the present invention will be described below, but these are given for illustrative purposes and do not limit the present invention.

A spunlace nonwoven fabric (lyocell spunlace) obtained by hydroentangling lyocell fibers as a wiper web was used.
This lyocell spunlace was cut into four rounds to prepare a cut raw material having a sheet size of 200 × 200 (mm) or 400 × 200 (mm), and all of the above cuttings were performed by shear cutting or score cutting.
Next, these cut original fabrics were folded by C-fold × half-fold or C-fold × C-fold × half-fold to obtain a final wiper product.
At the time of the above cutting and folding, the dust generated during these steps was removed by suction under reduced pressure using a suction device.

The C-fold, C-fold × C-fold, and C-fold × C-fold × half-fold in the folding process will be described with reference to the drawings.
As shown in FIG. 1 (C-folding), the cut original fabric (1) is folded in a C-shape with the upper and lower edges abutting or approaching each other from the upper and lower sides at a substantially center line portion (2).
As a result, the upper and lower cutting edges (3) and (4) are hidden by being located at the center line (2) of the C-folded body (5) folded into a C shape, and only the left and right cutting edges (6) and (7) are hidden. Will be exposed.
2 (C fold × C fold) is obtained by folding the C fold (5) of FIG. 1 into a C shape in the transverse direction, and (8) and (9) show the fold lines.
As a result, the left and right cut edges (6) and (7) are also hidden in the left and right center line portions, and the cut edge portions are not exposed to the outside.
FIG. 3 (C fold × C fold × half fold) is a C fold × C fold × half fold (11) obtained by further folding the C fold × C fold (10) of FIG. Show.
Thus, the upper and lower edge portions (3) and (4) and the left and right edge portions (6) and (7) are embedded in the folded body, and the external exposure of the cut edge portions is completely suppressed.

The result of having measured the amount of dust generation about the sample of each Example 1-4 obtained by the above is shown. For comparison, the same test was performed on the samples of Comparative 1 and 2.
<< Test method and results >>
-Dust generation measuring method It carried out according to JIS B9923 tumbling method.
-Counting of dust generation Measurement was performed with a particle counter KC-01D1 manufactured by Rion.

  The results in Table 2 are shown in FIG.

It is explanatory drawing of C folding. It is explanatory drawing of C fold x C fold. It is explanatory drawing of C fold x C fold x half fold. It is a graph which shows the dust generation result of an Example and a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Raw material for cutting 2 ... Center line part 3, 4 ... Upper and lower cutting edges 5 ... C-fold body 6, 7 ... Left and right cutting edges 8, 9 ... Left and right folding lines 10 ... C fold x C fold 11 …… C fold x C fold x half fold

Claims (4)

  Use a spun lace nonwoven fabric obtained by hydroentanglement of lyocell fiber as a raw fabric, cut this raw fabric into a predetermined size by shear cut or score cut, and fold or unfold this cut raw fabric with a wiper product Low dust-generating wiper characterized by   2. The low dust-generating wiper according to claim 1, wherein the cutting raw material is C-fold × half-fold or C-fold × C-fold or C-fold × C-fold × half-fold to reduce the degree of exposure at the periphery of the wiper product at the cut edge. .   The low dust-generating wiper according to claim 1 or 2, wherein dust generated during cutting and / or folding of the cut raw material is removed by suction under reduced pressure. The processing method of the low dust generation wiper of any one of Claim 1 to 3.

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