JP3962044B2 - Wipe sheet - Google Patents

Description

  The present invention relates to a wiping sheet that can be used for cleaning or sanitizing or sterilizing a flush toilet, or for wiping a human body, and can be discarded in a toilet after use. The present invention relates to a wiping sheet that can prevent floating in a septic tank.

A water-degradable wet sheet that can be thrown away into a flush toilet is used for cleaning a toilet or a room, or for wiping a diaper when changing diapers. This wet sheet is obtained by impregnating a water-degradable sheet formed of fibers such as wood pulp fibers and a water-soluble or water-swelling binder with a cleaning chemical. The detergent solution contains water, alcohol, surfactants, detergent components, preservatives, fragrances, and the like, and further contains metal ions to suppress dissolution of the binder. This wet sheet can maintain the strength of the sheet without being decomposed in the state impregnated with the cleaning solution containing the metal ions, and when flowing in a flush toilet, the metal ions of the cleaning solution are diluted with a large amount of water. It is decomposed in a flush toilet or septic tank.
JP-A-6-184984

  However, a conventional wet sheet is stored in a container in a four-fold or eight-fold state, and is generally used in a four-fold, eight-fold, or two-fold state during cleaning. It is often thrown away into the flush toilet after being folded in four or eight. However, in a state where the sheet is folded, air exists on the valley side of the folded portion, so that buoyancy is generated by this air, and the flow in the flush toilet becomes poor.

  In addition, some conventional wet sheets of this type are perforated so that they can be separated into two sheets, but each perforation has a short notch. Therefore, when it is thrown away in a flush toilet, the air present on the valley side of the folded portion of the sheet cannot be sufficiently released from the cut of the perforation, and it can contribute to the suppression of buoyancy. Absent.

  The present invention solves the above-mentioned conventional problems, and in a wiping sheet that can be discarded by wiping off dirt, it can be thrown into a flush toilet in a state of being folded in four, eight, or two. An object of the present invention is to provide a wiping sheet that facilitates escape of air on the valley side of the folding portion and easily sinks in the water stored in the flush toilet or in the septic tank.

The present invention is a wiping sheet in which a water-decomposable sheet is folded,
The sheet is folded in two at a first fold, and further folded by a second fold that is orthogonal to the first fold,
The crossing part of the 1st fold part and the 2nd fold part is characterized by being partially formed with the incision which can escape the air of the valley side of a fold part to the mountain side .

  In the above, a perforation for cutting the sheet is formed in the folding portion, and the partial notches for releasing air can be longer than the individual notches for the perforations. It is.

  The wiping sheet of the present invention is used, for example, for toilet cleaning, and is discarded in a flush toilet after use, and can be decomposed with toilet water or septic tank water. The wiping sheet is a paper or a non-woven fabric containing natural pulp fibers or chemical fibers such as rayon, and is formed to be decomposable with water. For example, the sheet is composed of fibers such as natural pulp and a water-soluble or water-swellable binder such as carboxymethylated pulp or carboxymethyl cellulose for bonding these fibers.

  In addition, the sheet | seat of this invention may be anything as long as it can be decomposed | disassembled in a septic tank, and is not restricted to the said thing.

In the present invention, when the sheet is further folded after being folded in half, the long cuts are formed at the intersecting portions of the respective folded portions. When the sheet is folded and thrown away into the flush toilet, the air present on the valley side of the folded portion escapes from the long slit and the buoyancy is lowered, and the sheet tends to sink in the flush toilet or septic tank. Further, in the case where the perforation for cutting the sheet is formed in the folded portion, the long slit for releasing the air is formed in either the part different from the perforation or the middle part of the perforation to release the air. Therefore, the opening size of the long cut is made larger than the opening size of the individual cut.

  The long slit may be used in combination with a porous sheet, or a wiping sheet made of a water-degradable sheet having no holes is effective in reducing buoyancy. Can demonstrate.

  When the wiping sheet of the present invention is thrown into a flush toilet in a state of being folded in two, four, or eight, the air on the valley side of the fold becomes easy to escape to the mountain side and easily sinks in the flush toilet or septic tank. .

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing the structure of a wiping sheet of the present invention, FIGS. 2A, 2B, and 2C are cross-sectional views showing a method of joining sheets, and FIG. 3 shows the formation of joints and bulges. 4 is a partially enlarged plan view of the wiping sheet showing the state, FIG. 4 is an explanatory view showing an example of a manufacturing method for forming a porous sheet, FIG. 5 is a partially enlarged view showing the papermaking cylinder of FIG. 4, FIG. 6 and FIG. 7 is a perspective view showing a state in which the wiping sheet is folded.

  The wiping sheet 1 shown in FIG. 1 is used, for example, for cleaning a toilet or for wiping, etc., and is discarded in a flush toilet after use and can be decomposed with water stored in a flush toilet or water in a septic tank. .

  The wiping sheet 1 has a three-layer sandwich structure of a first sheet S1 and second sheets S2 and S2 partially bonded and bonded by an adhesive bonding portion A on both front and back surfaces of the first sheet S1. In the region between the adhesive joint A and the adhesive joint A, a bulge is formed in the second sheet S2 to make it bulky. Alternatively, it may have a two-layer structure in which the first sheet S1 and the second sheet S2 are overlapped and bonded one by one. A bulge is formed in the second sheet S2.

  The first and second sheets are made from raw fiber such as natural pulp fiber, carboxylmethylated pulp or carboxymethylcellulose as a water-soluble or water-swellable binder, or polyvinyl alcohol, starch, carrageenan, galactomannan, acrylate ester It can be decomposed with water.

  Each of the sheets S1 and S2 has a large number of fine holes. For example, the fine small holes are provided in a wet papermaking process.

  FIG. 4 illustrates the wet papermaking process. Raw material fibers such as natural pulp fibers and carboxymethylated pulp, for example, are stirred together with water in the poucher 10 and sent to the papermaking tank 11 (wire part). In the papermaking tank 11 (wire part), the raw material fibers are adhered to the outer periphery of the cylinder 12 by the circulating pressure of the pump 13, and a paper layer (fiber web) W is formed. The paper layer (fiber web) W is transferred to the wet felt 14, further transferred from the top felt 15 to the drying drum 16, and dried on the surface of the drying drum 16. As shown in FIG. 5, fine convex portions 12a are formed on the surface of the paper making cylinder 12, and small holes penetrate through the paper layer (fiber web) W corresponding to the concave and convex portions having the convex portions 12a. Or, the density of the fibers is reduced, and small holes through which air easily passes are formed.

  The sheet S2 (or S1) dried by the drying drum 16 is taken up by the take-up drums 18 and 19, and a doctor blade 17 is applied to the surface of the dry drum 16 so that the take-up is faster than the peripheral speed of the dry drum 16. The peripheral speed of the drums 18 and 19 is set to be slow, and the sheet S2 is creped. The sheet S1 and the sheet S2 have different peripheral speed differences between the drying drum 16 and the take-up drums 18 and 19, and the crepe rate is adjusted by the magnitude of the peripheral speed difference. The sheet S1 is set to have a low crepe rate (or no crepe is formed), and the sheet S2 is set to have a relatively high crepe rate with respect to the sheet S1.

  The sheets S1 and S2 are stacked as shown in FIG. In FIG. 2A, the adhesive 2 is applied to both the front and back surfaces of the first sheet S1, and the second sheets S2 and S2 are stacked on the front and back surfaces of the first sheet S1. The adhesive 2 is applied, for example, so as to have a bonding pattern shown in FIG. 3, and the adhesive 2 is, for example, water-soluble carboxymethyl cellulose.

  The first sheet S1 and the second sheets S2 and S2 are stacked and pressed by the heating plates 4 and 5 while being humidified. The heating plate 5 is provided with an emboss 5a that matches the pattern of the adhesive bonding portion A. The sheet is pressed and heated by the emboss 5a, and the first sheet S1 and the second sheet S2 are bonded to each other. A are adhesively bonded to each other. What was joined is shown in FIG.

  The sheets S1 and S2 thus bonded and bonded are impregnated with a cleaning solution containing water and alcohol, a surfactant, a preservative, a deodorant and a fragrance, and metal ions which suppress the sheet from being hydrolyzed. When the cleaning chemical solution is impregnated, the crepe bottle of the sheet is restored and stretched. However, since the second sheet S2 has a higher crepe rate than the first sheet S1 and the elongation of the second sheet S2 when the crepe is restored is larger than that of the first sheet S1, as shown in FIG. In the region between the adhesive bonding portion A and the adhesive bonding portion A, the second sheet S2 is swollen and the bulky wiping sheet 1 is obtained.

  Since the cleaning chemical liquid impregnated in the sheet contains metal ions such as calcium and strontium as described above, the carboxyl methylated pulp contained in the first and second sheets and the water-soluble adhesive that bonds the sheets together. A cross-linking complex is formed with an adhesive such as carboxymethyl cellulose, and the decomposition of the binder and the joint is suppressed. Moreover, when thrown away into the flush toilet after use, the cleaning chemical is diluted with a large amount of water, and the sheet and the adhesive joint can be decomposed with water.

FIG. 3 shows an example of an adhesive pattern of the adhesive joint A.
In FIG. 3, the first and second sheets are partially bonded and bonded by a short linear short joint a shown by (1) (indicated as “1” in a circle in FIG. 3). Yes. The short joints a are arranged in a row in the Y direction at regular intervals, and the rows extending in the Y direction form the adhesive joints A shown in FIG. The short joint portion a is provided obliquely with an angle in the direction in which the crepe rib b of the second sheet S2 extends (X direction) and the pitch direction of the short joint portion a (Y direction). The row in which the joint portions a are arranged (adhesive joint portion A) is formed at a predetermined interval in the X direction.

  When each of the sheets S1, S2, and S2 is impregnated with the cleaning chemical solution, the fine creases b due to the creping process tend to swell in the Y direction. At this time, since the first sheet S1 and the second sheet S2 are bonded to each other at the portion (1) of the short joint portion a, the second sheet S2 is elongated in the Y direction at the portion (1). Hard to do. On the other hand, in the portion (2) sandwiched between the short joint portion a and the short joint portion a (indicated as “2” in the circle in FIG. 3), the second sheet S2 is easily stretched in the Y direction. Due to the elongation (b) in the Y direction, slack is likely to occur in the portion (2). As a result, in the region sandwiched between the adhesive joint A and the adhesive joint A arranged in the Y direction, a valley (3) connecting the short joint portions a on both sides (“3” in the circle in FIG. 3). And a mountain portion (4) (shown as “4” in the circle in FIG. 3) appears due to the bulging connecting the portions (2) on both sides. Therefore, in the region sandwiched between the adhesive joints A, the uneven ridges B substantially coincide with the arrangement pitch of the short joints a appear, and the convex parts (peaks) bulge. By forming this ridge B, the wiping effect can be enhanced.

  As shown in the sectional view of FIG. 2C, the wiping sheet 1 formed in this way swells in the region between the adhesive joints A and A, particularly in the mountain portion. The gap C is generated between the second sheet S2 and the first sheet S1, and the bulk is high. When the wiping sheet 1 is flowed to a toilet or the like after use, the air in the gap C escapes from the small holes 3 formed in the first sheet S1 and the second sheet S2, and the buoyancy of the sheet decreases. Since water enters between the small holes 3 between the sheets S1 and S2, the wiping sheet easily sinks in the water stored in the flush toilet or in the septic tank.

  6 is a perspective view showing a state in which the wiping sheet 1 is folded, and FIG. 7 is a partially enlarged view of FIG.

  As shown in FIG. 6, the wiping sheet 1 is folded in two by a first fold (folded line) L1, and is further folded by a second fold (folded line) L2 orthogonal to the first fold L1. Are folded into four, and then folded from the portion of the third fold L3 into eight. When stored in a container, it is normally in an eight-fold state. Further, when used for wiping and cleaning, it is used in a four-fold state or an eight-fold state as shown in FIG.

  Further, the perforation P1 is formed in the second folding portion L2, and the wiping sheet 1 can be separated into two sheets by separating the perforation P1 in a two-fold state. The perforation P1 is formed with short notches at a constant pitch. Moreover, as shown in FIG. 6 and FIG. 7 (partially enlarged view of FIG. 6), partial long cuts P2 and P3 are formed in the first folding part L1. The cuts P2 and P3 are formed sufficiently longer than the individual cuts of the perforation P1. The notch P2 is formed at the ridge line portion of the folded portion L1, and the notch P3 is formed at the intersection of the first folded portion L1 and the second folded portion L2.

  Therefore, after cleaning, when the wiping sheet 1 is thrown into the flush toilet in the folded state shown in FIG. 6 or the folded state shown in FIG. In addition, the air intervening in the two-fold valley portion (i) in the first fold portion L1 becomes easy to escape to the outside from the cuts P2 and P3, and the buoyancy is increased by the air in the valley portion (i). It becomes easy to sink in the water in the flush toilet or in the septic tank.

  Further, when discarded in the flush toilet in the four-fold or eight-fold state shown in FIG. 6, not only in the valley (i) of the fold L1, but also on the inner side (ii) of the intersection of the fold L1 and the fold L2. Although air tends to accumulate, the air in the part (ii) can easily escape from the part P3 to the outside. Therefore, even if it is thrown into the flush toilet in a folded state, the buoyancy is reduced in the accumulated water or the septic tank, and it tends to sink.

  Further, in the second folding portion L2, long cuts P2 and P3 may be formed in the middle of the perforation P1.

  In the above example, the wiping sheet 1 is used by being put in a plastic container or the like in a wet state impregnated with a cleaning chemical. Alternatively, it may be stored in a container in a dry state and impregnated or not impregnated with a cleaning chemical when used.

The perspective view which shows the whole structure of the wiping sheet of this invention, (A) (B) (C) is sectional drawing which shows the joining adhesion process among the manufacturing methods of the wipe sheet of this invention, Partial plan view showing an example of an adhesive pattern of the wiping sheet, Explanatory drawing explaining the wet papermaking process, FIG. 4 is a partially enlarged view of the paper cylinder shown in FIG. The perspective view which shows the state by which the wiping sheet was folded in four, FIG. 6 is a partially enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wiping sheet | seat 2 Adhesive 3 Small hole 12 Cylinder 12a for papermaking Micro convex part S1 1st sheet | seat S2 2nd sheet | seat A Adhesive joining part B C Folding part L3 Third folding part P1 Perforation P2, P3 Cut W to release air W Paper layer (or fiber web)

Claims (2)

A wiping sheet in which a water-decomposable sheet is folded,
The sheet is folded in two at a first fold, and further folded by a second fold that is orthogonal to the first fold,
A wiping sheet characterized in that a notch that allows air on the valley side of the folded portion to escape to the mountain side is partially formed at the intersection of the first folded portion and the second folded portion . The folding unit, the sheet has perforations are formed for cutting, the partial cuts allow air to escape, wiping of claim 1, wherein the longer opening than the individual slit perforations sheet.

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