TW202133726A - Wet sheet for cleaning and manufacturing method of the wet sheet for cleaning - Google Patents

Abstract

In a manufacturing method of a cleaning wet sheet 100 made of a base paper sheet P made from wood pulp, by blending an aluminum compound of an electrolyte with a chemical solution impregnated in the base paper sheet P coated with a water-soluble binder, the water-soluble binder and the aluminum ions are crosslinked, and it is possible to form a cleaning wet sheet 100 that does not tear or melt and has excellent tensile strength, surface strength, tear strength, water resistance, even if it is attached to a cleaning tool 200 to clean water stains.

Description

Wet wipes for cleaning and manufacturing method of the wipes for cleaning

The present invention relates to a cleaning wet tissue and a method for manufacturing the cleaning wet tissue.

Conventionally, some of the wet wipes for cleaning are known to be made of non-woven fabrics (for example, refer to Patent Document 1).

[Prior Technical Literature]

[Patent Literature]

[Patent Document 1] JP 2019-112342 A

Compared with non-woven fabrics made of chemical fibers, paper made of natural fibers is superior from the viewpoint of environmental protection, but the strength of cleaning wipes made of paper is weak, especially for wiping and cleaning water stains. It sometimes breaks during the process.

The object of the present invention is to provide a cleaning wet tissue that is made of paper and has excellent strength and a method for manufacturing the cleaning wet tissue.

The invention described in Item 1 is a cleaning wipe in which a chemical liquid is impregnated in a base paper sheet coated with a water-soluble adhesive.

The aforementioned base paper sheet is made of wood pulp,

The aforementioned chemical solution contains aluminum ions.

The invention described in Item 2 is the cleaning wipe described in Item 1, in which propylene glycol monomethyl ether is blended in the aforementioned chemical solution.

The invention described in Item 3 is the cleaning wipes described in Item 1 or 2, wherein the cleaning wipes are formed by plying a plurality of sheets of the base paper.

The invention described in Item 4 is a method for manufacturing cleaning wipes, which includes:

The step of making a base paper sheet by making wood pulp composed of wood fibers,

The coating step of applying the water-soluble adhesive to the aforementioned base paper sheet, and

The step of impregnating the aforementioned base paper sheet with the chemical liquid containing aluminum ions.

According to the present invention, it is possible to provide a cleaning wet tissue that is made of paper and is excellent in strength, and a method for manufacturing the cleaning wet tissue.

20: Embossing department

21: convex embossing

21a: the first convex part

21b: 2nd convex part

22: concave embossing

22a: The first recess

22b: The second recess

30: Non-embossed part

31: recess

100: Wipes for cleaning

200: cleaning tool

201: Head

201a: Long edge

202: handle

H: Step

P: base paper sheet

S: Bending part

Fig. 1 is a diagram showing the state of the cleaning wet wipes of this embodiment when in use.

Fig. 2A is a diagram showing the fiber orientation of a conventional paper.

Fig. 2B is a diagram showing the fiber alignment of the present invention.

Fig. 3 is a plan view showing an example of a cleaning wipe.

Fig. 4 is an enlarged view of part A of Fig. 3.

Fig. 5 is a cross-sectional view on the line V-V of Fig. 4;

Hereinafter, referring to the drawings, the cleaning wet wipe 100 belonging to the embodiment of the present invention will be described. However, the scope of the present invention is not limited to the illustrated examples, but is judged based on the description of the scope of the patent application.

In addition, in the following description, the X direction, Y direction, and Z direction are determined as shown in FIG. 1 for explanation.

[Constitution of Implementation Type]

Fig. 1 is a diagram showing the state of the cleaning wet wipe 100 of this embodiment when in use.

As shown in FIG. 1, the cleaning wipe 100 is, for example, a sheet of a plurality of base paper sheets P that are laminated (laminated), and the sheet is replaceably mounted on a rectangular flat-shaped head 201 and mounted on the head The cleaning tool 200 of the handle 202 on the upper surface of the part 201.

The cleaning wet tissue 100 covers the bottom surface of the head 201 of the cleaning tool 200 to form a cleaning surface, and is bent along the long edge 201a of the head 201 of the cleaning tool 200 to be locked to the upper surface of the head 201. And become the state of pretending.

The long edge portion 201a means the edge portion along the longitudinal direction of the head 201. That is, it means the longer two edges among the four edges of the rectangular head 201.

The base paper sheet P is composed of wood pulp using wood fiber as a raw material. Examples of wood pulp include: Laubholz Bleached Kraft Pulp (LBKP: Laubholz Bleached Kraft Pulp) of hardwood, Nadelholz Bleached Kraft Pulp (NBKP: Nadelholz Bleached Kraft Pulp) of conifer, and unbleached Kraft Pulp of hardwood (LUKP: Laubholz Unbleached Kraft Pulp), Unbleached kraft pulp of conifers (NUKP: Nadelholz Unbleached Kraft Pulp), sulfite pulp of hardwood, and sulfite pulp of conifers, etc., can be blended at any appropriate ratio.

Although there are natural fibers such as kenaf, hemp, and reed, the strength of non-wood pulp made of this kind of raw material is weak, and the unit price of the pulp itself is high, which increases the manufacturing cost, which is not good.

In addition, the old paper pulp composed of old paper has many fine fibers, so the filterability of the base paper sheet P deteriorates and the production speed is reduced. In addition, the appearance of the paper surface after impregnation with the chemical solution deteriorates, and the interlayer strength also decreases, so Bad.

In view of the above, it is preferable to use the above-mentioned wood pulp in the production of the base paper sheet P.

[Water-soluble adhesive]

In addition, the base paper sheet P of the cleaning wet tissue 100 is provided with a water-soluble adhesive that is useful for enhancing paper strength. Water-soluble binders include: carboxymethyl cellulose (CMC: Carboxymethyl Cellulose), polyvinyl alcohol, starch or its derivatives, hydroxypropyl cellulose, sodium alginate, Trant Gum, guarana Guar Gum, Xanthan Gum, Arabian Gum, Carrageenan, Galactomannan, Gelatin, Casein, Albumin, Polyglucose (Pullulan), polyethylene oxide, viscose fiber (Viscose), polyvinyl ethyl ether, sodium polyacrylate, sodium polymethacrylate, polyacrylamide, hydroxylated derivatives of polyacrylic acid, polyvinyl A binder component such as pyrrolidone/vinylpyrrolidone vinyl acetate copolymer.

In particular, it is preferable to use a water-soluble adhesive having a carboxyl group from the point of view that the wet strength can be expressed by a cross-linking reaction.

The water-soluble adhesive having a carboxyl group is an anionic water-soluble adhesive that easily generates carboxylic acid esters in water. Examples thereof include polysaccharide derivatives, synthetic polymers, and natural products.

(Polysaccharide derivatives)

Examples of the polysaccharide derivative include CMC salt, carboxyethyl cellulose or its salt, carboxymethylated starch or its salt, and the like, and the alkali metal salt of CMC is particularly preferred.

(CMC)

Regarding CMC, the degree of etherification is preferably from 0.6 to 2.0, particularly preferably from 0.9 to 1.8, and more preferably from 1.0 to 1.5. This is due to the excellent performance of hydrolyzability and wet paper strength.

In addition, CMC is preferably water-swellable. This is because it can perform the function of connecting the fibers constituting the base paper sheet P in the unswollen state by cross-linking with the aluminum ion as the cross-linking agent in the chemical solution of this embodiment, and it appears as a bearable This is due to the strength of the cleaning wipe 100 for cleaning and wiping operations.

In the case of the cleaning wipe 100 of this embodiment, CMC can be given as a water-soluble adhesive.

The CMC may be in a state where the thickness of the base paper sheet P is uniformly impregnated, and it is preferable that the CMC content gradually increases from the center of the base paper sheet P in the thickness direction toward the surface and the back. This is because the cleaning wipe 100 is less likely to break even if it wipes the cleaning surface, etc., compared with the previous product uniformly impregnated with the same amount of water-soluble adhesive.

(Synthetic polymer)

Synthetic polymers include: salts of polymers or copolymers of unsaturated carboxylic acids, salts of copolymers of unsaturated carboxylic acids and monomers copolymerizable with the unsaturated carboxylic acids, and the like. Examples of unsaturated carboxylic acids include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic anhydride, maleic acid, and fumaric acid. Monomers that can be copolymerized with these include esters of these unsaturated carboxylic acids, vinyl acetate, ethylene, acrylamide, vinyl ether, and the like. Particularly preferred synthetic polymers are those using acrylic acid or methacrylic acid as the unsaturated carboxylic acid. Specific examples include: polyacrylic acid, polymethacrylic acid, salt of acrylic acid-methacrylic acid copolymer, acrylic acid or methacrylic acid and acrylic acid Salts of alkyl esters or copolymers of alkyl methacrylates.

Examples of natural products include sodium alginate, xanthan gum, gellan gum, Tragacanth gum, pectin, and the like.

(CNF)

In addition, cellulose nanofiber (CNF: Cellulose Nanofiber) may be added to the cleaning wipe 100.

That is, CNF can be added to the water-soluble adhesive (CMC in the case of this embodiment), and the specific surface area of the base paper sheet P becomes larger than that of the composition with only pulp.

The term CNF here refers to the fine cellulose fibers obtained by dissolving pulp fibers. Generally speaking, it refers to cellulose fibers containing cellulose microfibers with a fiber width of nanometer size (1nm to 1000nm). It is preferably a fiber with an average fiber width of 100 nm or less. For the calculation of the average fiber width, for example, a certain number of number average diameter, median diameter, mode diameter (the most frequent value), etc. can be used.

CNF can be in a state where the thickness of the base paper sheet P is evenly impregnated, and it is preferable that the content of CNF increases from the center of the thickness direction of the base paper sheet P to the surface and back. The face slowly increased its state. This is because the cleaning wipe 100 is less likely to break even if it wipes the cleaning surface, etc., compared with the previous product uniformly impregnated with the same amount of water-soluble adhesive.

(Can be used for the pulp fiber of CNF)

The pulp fibers that can be used in the manufacture of CNF include: hardwood pulp (LBKP), conifer pulp (NBKP) and other chemical pulps; bleached and preheated mechanical pulp (BTMP: Bleached Thermo-Mechanical Pulp), ground stone shredded pulp (SGP: Stone Ground Pulp), Pressurized Ground Wood (PGW: Pressurized Ground Wood), Refined Ground Pulp (RGP: Refiner Ground Pulp), Chemical Ground Pulp (CGP: Chemi-Ground Pulp), Preheated Ground Pulp (TGP: Thermo -Ground Pulp), ground pulp (GP: Ground Pulp), preheated mechanical pulp (TMP: Thermo-Mechanical Pulp), chemical preheated mechanical pulp (CTMP: Chemi-Thermo-Mechanical Pulp), refined mechanical pulp (RMP: Refiner Mechanical Pulp) and other mechanical pulp; from tea old paper, kraft paper bag old paper, magazine old paper, newspaper old paper, flyer old paper, office old paper, corrugated box old paper, whitening old paper, drawing old paper, moulded old paper , Old paper pulp made of old paper, ground wood pulp old paper, etc.; Deinked pulp (DIP: Deinked Pulp) for deinking old paper pulp, etc. Without prejudice to the effect of the present invention, these can be used alone or in combination of plural kinds.

(CNF solution method)

Examples of the methods used in the manufacture of CNF include mechanical methods such as high-pressure homogenizer method, microfluidization method, attritor grinding method, bead mill freezing and pulverization method, and ultrasonic solution method. It is not limited to these methods.

In addition, the CNF that has been mechanically treated (without denaturation) only by the above-mentioned method of dissolution, that is, CNF with unmodified functional groups, is compared with those that have been modified with functional groups such as phosphate or carboxymethyl. Due to its high thermal stability, it can be used in a wider range of applications, and CNF modified with functional groups such as phosphoric acid or carboxymethyl can also be used in the present invention.

In addition, for example, a chemical treatment such as carboxymethylation or an enzyme treatment may be applied to the pulp fiber which is subjected to a mechanical treatment of the solution. Examples of CNF after chemical treatment include: TEMPO (2,2,6,6-tetramethylpiperidine-1-oxide; 2,2,6,6-tetramethylpiperidine-1-oxyl) oxidation CNF, Phosphorylated CNF, phosphiteated CNF, etc. have a diameter of 3 to 4 nm iCNF (individualized CNF) (mono-nanocellulose).

In addition, it can also be CNF after chemical treatment or enzyme treatment alone, or CNF that has been subjected to chemical treatment or enzyme treatment by mechanically decomposing CNF.

[Fiber orientation ratio]

In addition, there is no particular limitation on the ratio (longitudinal/horizontal) of the fiber orientation of the cleaning wipe 100 in the vertical and horizontal directions, and it is preferably 0.8 to 2.0, and particularly preferably 0.8 to 1.2.

In the paper making step, which is a paper manufacturing step, the fibers are spread on the wire of the paper making machine and circulated in the conveying direction. Therefore, in general, paper has a large amount of fibers in the conveying direction of the paper making machine. Vertical arrangement (for example, vertical: horizontal = 2.3:1, etc.; refer to Figure 2A) characteristics. Therefore, the fiber density in the transverse direction is thin and the fibers are easily broken. That is, it is easy to break due to the difference in the wiping direction. Therefore, in this embodiment, as shown in FIG. 2B, the fiber orientation ratio of the cleaning wipe 100 in the vertical and horizontal directions is set to 0.8 to 2.0, preferably 0.8 to 1.2, which can provide a A cleaning wipe 100 that is not easy to break when wiping in the direction. In addition, the ratio of the fiber orientation in the vertical and horizontal directions can be obtained from the ratio of the wet strength in the MD and CD directions.

[Medicinal solution]

In addition, the cleaning wipe 100 of this embodiment is impregnated with a predetermined chemical solution containing an aluminum compound. In addition, the chemical liquid system contains auxiliary agents such as glycol ethers, aqueous detergents, preservatives, sterilizing agents, lower alcohols, and organic solvents.

The medicinal solution is impregnated in the dried base paper sheet P after coating with a water-soluble adhesive.

The medicinal solution impregnated in the hydrophilic fiber is released from the surface and the inside of the cleaning wipe 100 when the cleaning wipe 100 is used.

In addition, the medicinal solution is impregnated with 100% to 500% by mass, preferably 150% to 300% by mass, with respect to the mass of the base paper sheet P which is the base material of the cleaning wet wipe 100.

In addition, the pH of the chemical solution is preferably set to a range where the cationicity of the aluminum species is 4 or more and less than 6 which is active.

(Aluminum compound)

The aluminum compound is used as a crosslinking agent for crosslinking with a water-soluble adhesive (CMC in the case of the cleaning wipe 100 of this embodiment) to increase paper strength.

As mentioned above, since aluminum ions are cross-linked with the water-soluble binder to increase the paper strength, the aluminum compound is the electrolyte, preferably, for example, alkaline aluminum chloride, alkaline polyaluminum hydroxide and other alkaline aluminum compounds, or Water-soluble aluminum compounds such as alumina sol, etc., which are easily decomposable in water, can be used arbitrarily as needed.

(Glycol ethers)

The so-called glycol ethers are structures obtained by etherifying the hydroxyl groups on one side or both ends of a diol which is a dihydric alcohol, and have hydrophobic alkyl groups and hydrophilic ether groups and hydroxyl groups in the molecule. The compound has a smaller molecular weight compared with surfactants, and has a lower dynamic surface tension than cleaners containing only conventional surfactants, which can cause the boundary between the chemical solution and the dirt more quickly. 面Forming. In addition, glycol ethers also act as a coupling agent that dissolves hydrophobic oil or dirt with water, and can pull dirt away and prevent reattachment. Therefore, by adding glycol ethers to the chemical liquid, the wiping performance of the cleaning wipe 100 can be improved.

The medicinal solution of the present invention contains propylene glycol monomethyl ether (PGME: Propylene Glycol Monomethylether), diethylene glycol monobutyl ether, ethylene glycol monomethyl ether, and diethylene glycol monomethyl ether, which are glycol ethers. , Triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, ethylene glycol isopropyl ether, diethylene glycol monoisopropyl ether, triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, ethyl Glycol isopropyl ether, diethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, etc.

In particular, PGME is generally known to be added as a cleaning ingredient to enhance the cleaning power, and it also directly shows the effect of increasing the strength of the sheet, and has the effect of increasing the strength of the sheet caused by the polyvalent metal ion. As a result, it is considered that it is a person who achieves a high deodorizing effect. The amount of PGME is preferably 20 g/m ² to 60 g/m ² , particularly preferably 26 g/m ² to 40 g/m ² . This is because when it is less than 20g/m ² , the deodorizing effect cannot be sufficiently obtained, and even if more than 60g/m ² is applied, it will not obtain a greater deodorizing effect ^{than when 60g/m 2 is applied.} Therefore.

(Water-based detergent)

As the aqueous detergent, in addition to the surfactant, for example, a lower or higher (aliphatic) alcohol can be used.

(preservative)

As the preservative, for example, parabens such as methyl paraben, ethyl paraben, and propyl paraben can be used.

(Sterilant)

As a sterilant, for example, Benzalkonium Chloride, Chlorhexidine Gluconate, Povidone Iodine, ethanol, benzalkonium cetyl phosphate salt ( Benzalkonium cetyl phosphate, Triclosan, Chlorxylenol, isopropyl methylphenol, etc. As the organic solvent, polyhydric alcohols such as diol (divalent), glycerin (trivalent), and sorbitol (quaternary) can be used.

In addition, the auxiliary agent for the above-mentioned medicinal solution components can be appropriately selected, and the medicinal solution may contain components that achieve other functions as needed. For example, propylene glycol (PG: Propylene Glycol) can be used as an auxiliary agent to dissolve the preservative or sterilant.

[Cleaning wipes]

Fig. 3 is a plan view showing an example of the cleaning wet wipe 100 of this embodiment.

As shown in FIG. 3, the cleaning wet wipe 100 is a rectangular shape with a long side in the X direction, for example, it is formed to be 250mm to 300mm in the X direction (long side direction), preferably 260mm to 290mm, in the Y direction (Short side direction) 180mm to 230mm, preferably 200mm to 210mm.

In the cleaning wet tissue 100, the portion bent along the long side 201a of the head 201 of the cleaning tool 200 is called the bent portion S.

The bent portion S is set in a rough position according to the head 201 of the specified cleaning tool 200 in advance. That is, at a predetermined position in the Y direction of the cleaning wet tissue 100, two rows of bending portions S extending in the X direction are set. In addition, the bent portion S is in a manner that can be recognized by the user. For example, a straight line corresponding to the bent portion S may be printed on the cleaning wipe 100 in advance, or a line corresponding to the bent portion S may be formed on the cleaning wipe 100. The broken line of S.

Then, the non-embossed part 30 is arranged in plural at predetermined intervals in the X direction along the bending part S of the cleaning wet tissue 100, and the embossed part 20 is arranged to cover the arrangement excluding the cleaning wet tissue 100. The entire area of the non-embossed portion 30.

In this way, in the cleaning wet tissue 100, the embossed part 20 and the non-embossed part 30 are alternately arranged at the position corresponding to the long side ridge part 201a of the head 201 of the cleaning tool 200.

(Embossing Department)

The embossing portion 20 is a portion where the sheet is compressed in the thickness direction in the cleaning wet tissue 100.

The embossing portion 20 can be formed by, for example, hot embossing at a temperature of 80° C. to 130° C. and an embossing pressure of 0.2 MPa to 1.0 MPa.

Fig. 4 is an enlarged view of area A in Fig. 3. In addition, FIG. 5 is a cross-sectional view on the line V-V of FIG. 4.

As shown in Figures 4 and 5, on the embossing portion 20, a convex embossing 21 is formed on the upper side (one side of the cleaning wipe 100), and on the lower side (the other side of the cleaning wipe 100) One surface side) is formed with concave embossing 22 that is convex (that is, the upper side is concave).

The convex embossing 21 and the concave embossing 22 are arranged differently from each other in an alternate arrangement in either the X direction and the Y direction. In this way, by arranging the convex embossing 21 and the concave embossing 22 alternately on a regular basis, the trapping property of debris can be improved.

In the embossing portion 20, an intermediate portion 23 is formed between the convex embossing 21 and the concave embossing 22 that are arranged differently from each other. The middle portion 23 is a portion where the convex emboss 21 and the concave emboss 22 are not formed. Therefore, the middle portion 23 becomes a position lower than the convex emboss 21 and higher than the concave emboss 22 in the Z direction.

In addition, the embossing pattern does not need to be the above-mentioned embossing pattern, and it can also be an embossing pattern in which the convex embossing 21 or the concave embossing 22 are arranged in a row, or an embossing pattern arranged irregularly.

In particular, by expanding the interval of the embossing patterns, it is easy for the debris to enter the embossing, and by reducing the interval of the embossing patterns, the debris is not easy to fall off the sheet. Therefore, when the interval of the embossing patterns is enlarged on the outer side of the cleaning wet tissue 100 and the interval of the embossed patterns is reduced on the inner side, the debris entering the embossing can be swept without falling off, which is preferable.

In addition, for example, only one of the convex embossing 21 and the concave embossing 22 may be provided.

(Convex embossing)

As shown in FIG. 4, the convex embossing 21 is formed in a so-called gourd shape with a narrow width in the X direction when viewed from above, and a constricted portion at the center of the Y direction. The above-mentioned shape is preferable from the viewpoint of the catchability of debris, but the shape of the convex embossing 21 is not limited to this, for example, it may be formed in various shapes such as a circle, an ellipse, and a polygon. In addition, it may be a combination of various shapes.

The convex embossing 21 is formed in the X direction from 2mm to 5mm, preferably from 3mm to 4mm, in the Y direction from 5mm to 10mm, preferably from 6mm to 8mm, in the Z direction (from the middle portion 23) The height) is 0.5 mm to 2 mm, preferably 0.7 mm to 1.5 mm.

In addition, as shown in Fig. 5, the convex embossing 21 is formed in a convex shape stepwise toward the upper side when viewed in cross section. That is, when viewed in cross section, on the top of the first convex portion 21a protruding from the surface (upper surface) of the sheet, a second convex portion 21b protruding further upward is formed.

More specifically, the top of the first convex portion 21a has a flat step H of 0.5 mm to 3 mm, preferably 1 mm to 2 mm, on both ends in the Y direction, and has a first convex portion on both ends in the Y direction. 2 convex portion 21b.

With this structure, the cushioning properties of the cleaning wet tissue 100 can be improved, and the embossed shape can be easily maintained during cleaning.

(Concave embossing)

As shown in FIG. 4, the concave embossing 22 is formed in a so-called gourd shape which is substantially the same shape as the convex embossing 21 in a plan view. In addition, the shape of the concave embossing 22 is not limited to this, and it may be formed in various shapes, and may be configured to have a shape different from the convex embossing 21.

In addition, as shown in FIG. 5, the concave embossing 22 is formed in a shape that is gradually concave toward the lower side, which is opposite to the convex embossing 21 in a cross-sectional view. That is, when viewed in cross section, on the top of the first recess 22a protruding from the surface (lower surface) of the sheet, a second recess 22b protruding further downward is formed.

More specifically, the top of the first recess 22a has a flat step H of 0.5 mm to 3 mm, preferably 1 mm to 2 mm, on both ends in the Y direction, and has a second central end on the Y direction. Recess 22b.

With this structure, the cushioning properties of the cleaning wet tissue 100 can be improved, and the embossed shape can be easily maintained during cleaning.

(Non-embossed part)

The non-embossed portion 30 is a portion where the sheet of the cleaning wet tissue 100 is not compressed in the thickness direction and has fluffs, and is arranged in plural along the row-shaped bending portion S of the cleaning wet tissue 100.

The non-embossed portion 30 can be formed by designing the embossing roller that forms the embossed portion 20 in a manner that excludes the shape of the non-embossed portion 30.

In addition, the non-embossed portion 30 is not limited to the case where it is not compressed at all, and compared with the compressed portion of the embossed portion 20, it may be slightly compressed to the extent that fluff remains. In addition, the non-embossed part 30 may also contain non-raised parts.

The size of the non-embossed portion 30 is formed in the X direction from 40 mm to 70 mm, preferably from 50 mm to 60 mm, and in the Y direction from 15 mm to 70 mm, preferably from 20 mm to 50 mm.

By setting in this way, when the fold line corresponding to the bending portion S is formed on the cleaning wet tissue 100 during manufacture, even if the fold line caused by the device snakes, the fold line can be formed at an appropriate position.

(Concave)

In the state where the cleaning wet tissue 100 is mounted on the cleaning tool 200, each of the non-embossed portions 30 preferably has a shape of a recessed portion 31 that is open with respect to the long side ridge portion 201a of the head 201.

Specifically, for example, as shown in FIG. 3, the non-embossed portion 30 may be formed in the right direction or the left direction, that is, when viewed from the center of the rectangular cleaning wet tissue 100 toward the long side, it is open when viewed from above. V-shaped. That is, if it is a V-shaped non-embossed portion 30 in a plan view, it has a V-shaped concave portion 31.

Thereby, when the cleaning wipe 100 is moved in the Y direction, that is, in a direction parallel to the short side of the cleaning wipe 100 for cleaning, the debris is likely to stay in the recess 31, which can further improve The trapping of debris.

Moreover, as shown in FIG. 3, the non-embossed part 30 is arrange|positioned so that the position in the X direction is shifted in each row, and is mutually different. That is, along the non-embossed portion 30 of the bent portion S corresponding to the long side portion 201a of the head 201, and along the non-embossed portion 30 corresponding to the head 201 The non-embossed portion 30 of the bent portion S on the other side of the long-side 縁 portion 201a is arranged at different positions in the direction in which the bent portion S extends.

Thereby, when the cleaning wet tissue 100 is moved in the Y direction, that is, in the direction parallel to the short side of the cleaning wet tissue 100 to perform cleaning, the trapping properties are complementary without gaps. Since the non-embossed part 30 passes through the ground, the trapping properties of debris can be improved.

[Example]

The following examples illustrate the present invention specifically, but the present invention is not limited to these.

[Sample Making]

First, prepare two base paper sheets P with a basis weight (weight per unit area) of 43 g/m ² and NBKP 40% and LBKP 60%, and laminate the base paper sheets P to each other.

Then, a water-soluble adhesive coating device is used to spray a 96% water and 4% CMC adhesive solution on the outer surface of the base paper sheet P.

Then, it was passed through a hot air dryer (temperature 180°C) and dried until the moisture content reached approximately 8%.

In addition, the CMC contained in the adhesive solution is CMC1330 (Daicel).

Then, the following conditions of Example 1 and Comparative Examples 1 to 3 were used to prepare the medicinal solution, and the wet tissues of Example 1 and Comparative Examples 1 to 3 were produced by impregnating them with 200% by mass relative to the dry weight.

(Example 1)

The liquid medicine is prepared with aluminum (III) chloride (AlCl ₃ ) 4.550%, PGME 16.500%, water-based detergent 0.200%, preservative 0.205%, sterilant 0.200%, PG 3.000%, and purified water 75.345%.

(Comparative example 1)

The liquid medicine is prepared with _{3.610% magnesium chloride (MgCl 2} ), 16.500% PGME, 0.200% aqueous detergent, 0.205% preservative, 0.200% sterilant, 3.000% PG, and 76.285% refined water.

(Comparative example 2)

The liquid medicine is formulated with zinc chloride (ZnCl ₂ ) 1.920%, PGME 16.500%, water-based detergent 0.200%, preservative 0.205%, sterilant 0.200%, PG 3.000%, and purified water 77.975%.

(Comparative example 3)

The liquid medicine is prepared with _{2.550% calcium chloride (CaCl 2} ), 16.500% PGME, 0.200% aqueous detergent, 0.205% preservative, 0.200% sterilant, 3.000% PG, and 77.345% refined water.

Using the wet wipes of Example 1 and Comparative Examples 1 to 3, the following tests 1-4 were performed.

[Test 1. Tensile strength test]

Cut the wet tissue into a 25mm width to form a test piece, and clamp the two ends of the test piece with the clamps of a tensile testing machine (TENSIRON RTG1210 manufactured by A&D). The distance between the clamps is 50mm and the speed is 500mm/min. Next, measure the maximum load point when the laminated fabric of the base paper sheets P at each adhering position peels off. This test was performed 4 times on each wet tissue, and the average value of the tensile strength was calculated.

[Test 2. Surface strength test]

In such a way that the two end regions in the width direction overlap, the test piece that is not peeled off and cut with a width of 75 mm × a length of 240 mm is folded into three folds, and the Gakushin-type (Gakushin- type) The rubbing firmness tester wipes the measurement part, and measures the number of rubbings at the point when it is visually confirmed that the paper surface of the test piece is damaged such as fluffing or cracking. In addition, the test conditions of the Gakushin friction firmness tester are as follows.

‧Xuezhen type friction firmness testing machine

Model AB301 manufactured by Tester Sangyo Co., Ltd.

‧Friction parts

Shape 20mm×R50mm

Load 200gf (including white cotton fixing buckle and arm)

Load per unit area 50gf/cm ² (load 200gf/contact area 4.0cm ² )

On the cotton fixing buckle of the friction part, one piece of PP strap (Sekisui Jushi Co., Ltd. model 19K (width 15mm x length 60mm)) is fixed to the friction with a fastening screw in a way that does not produce gaps or wrinkles. Pieces.

‧Sample carrier

Shape R200mm

Stroke 120mm

Round trip speed 30cps

‧Test piece

Width 25mm (Wide 75mm folded into 3 folds without peeling off the stack)×Length 240mm (Sample carrier side)

‧experiment procedure

(1) Mount the test piece on the sample carrier so that it will not slack.

(2) Place the friction piece on the sample carrier steadily.

(3) Press the start key to start the test.

‧Measure to judge

Each test piece was subjected to the above-mentioned test 4 times, and the number of times when damage such as fluffing or cracking was visually confirmed on the paper surface of the test piece was measured, and the average value was calculated.

In addition, in the above test, it is assumed that the cleaning wet wipe 100 is actually used, that is, the surface to be cleaned is rough due to the adhesion of dirt, and the PP belt with mesh pattern applied on the surface is used as a school Vibration pieces. Thereby, an environmental test assuming the actual use of the cleaning wipe 100 can be performed, and it can be highly reliable to evaluate whether the cleaning wipe 100 can withstand actual use.

[Test 3. Tear strength test]

For each wet wipe, the tear strength was measured 4 times according to the method according to JIS P8116 (2000), and the average value was calculated.

The results of tests 1-3 are shown in Table I.

[Table 1]

[Evaluate]

When comparing Example 1 in Table I with Comparative Examples 1 to 3, it can be seen that by impregnating a chemical solution containing aluminum (III) chloride with aluminum ions, and blending with other polyvalent metals The tensile strength, surface strength, and tear strength of the test piece are higher than those impregnated with ionic inorganic compounds.

It is believed that this is because the strength of the sheet is improved by the multivalent metal ions, especially the aluminum ion is easier to crosslink with the water-soluble adhesive than other metal ions.

[Test 4. Hydrolysis test]

For each wet wipe, the hydrolyzability was measured 4 times according to the method of JIS P4501 (2006) 4.5 "Easy to Hydrolyze", and the average value was calculated.

The results of Test 4 are shown in Table II.

[Table 2]

[Evaluate]

As shown in Table II, only when aluminum (III) chloride was formulated in the chemical solution, the test piece did not dissolve in water even after 10 minutes or more.

When comparing Example 1 of Table II with Comparative Examples 1 to 3, it can be seen that the cleaning wipe 100 can be insolubilized by blending the aluminum compound in the chemical solution and impregnating it. Therefore, even in the cleaning of water stains, etc., the cleaning wet tissue 100 can be used without being dissolved or broken.

As mentioned above, it is believed that compared with other metal ions, aluminum ions are easier to crosslink with water-soluble binders, so the strength is increased and it is not easy to dissolve in water.

[Test 5. Actual use test]

After cutting each wet tissue into X-direction (long side direction) 290mm×Y-direction (short-side direction) 210mm, put them on mops (Dawang Paper Co., Ltd., (X-direction 250mm×Y-direction 98mm)). With a load of 3kg, drag the 250mm×750mm surface to be cleaned back and forth 15 times. At this time, the wet wipes are not broken at all as ○, those with a little broken are regarded as △, and those who are broken and become scattered are regarded as × for evaluation.

The results of Test 5 are shown in Table III.

[table 3]

[Evaluate]

When comparing Example 1 in Table III with Comparative Examples 1 to 3, it can be seen that only when aluminum (III) chloride is blended in the chemical solution, even if it is actually installed in the cleaning tool 200 for use, It can also obtain the strength that the cleaning wet wipe 100 will not break.

(Effects of Implementation Types)

According to this embodiment, since the base paper sheet P of the cleaning wipe 100 is coated with a water-soluble adhesive and an aluminum compound is blended in the impregnated chemical solution, it can be water-soluble and bonded during the impregnation of the chemical solution. The agent is cross-linked with aluminum ions, the strength of the cleaning wipe 100 is increased, even if it is used for wiping and cleaning, it is not easy to break, and it is insoluble that it will not dissolve in water stains.

In addition, since the cleaning wet tissue 100 is composed of a base paper sheet P using wood pulp as a raw material, compared with a non-woven fabric using chemical fibers as a raw material, the load on the environment is small when it is manufactured or discarded.

In addition, other specific detailed structures, etc., can of course be changed as appropriate.

For example, the cleaning wet wipe 100 is configured to be attached to the cleaning tool 200 and used for floor cleaning, but it is not limited to this, and it can also be used for hand-wiping on kitchen countertops, windows, and the like.

In addition, the liquid medicine impregnated in the cleaning wipe 100 can also be changed according to its use.

In addition, although the trapping property of the debris will be reduced, the embossing part 20 or the non-embossing part 30 may be provided on the entire surface of the cleaning wet wipe 100.

In addition, the cleaning wet tissue 100 is configured as a sheet obtained by laminating (laminating) a plurality of base paper sheets P, but it is not limited to this, and may be a single-layer sheet.

[Industrial Applicability]

The present invention can be applied to a cleaning wet tissue made of paper and excellent in strength, and a method for manufacturing the cleaning wet tissue.

20: Embossing department

30: Non-embossed part

31: recess

100: Wipes for cleaning

S: Bending part

Claims (4)

A cleaning wet tissue, which is a cleaning wet tissue impregnated with a liquid medicine in a base paper sheet coated with a water-soluble adhesive, The aforementioned base paper sheet is made of wood pulp, The aforementioned chemical solution contains aluminum ions. The cleaning wipe according to claim 1, wherein propylene glycol monomethyl ether is blended in the aforementioned liquid medicine. The cleaning wipes according to claim 1 or 2, wherein the cleaning wipes are formed by laminating and processing a plurality of the aforementioned base paper sheets. A method for manufacturing wet wipes for cleaning, which includes: The step of making a base paper sheet by making wood pulp composed of wood fibers, The coating step of applying the water-soluble adhesive to the aforementioned base paper sheet, and The step of impregnating the aforementioned base paper sheet with the chemical liquid containing aluminum ions.

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