JP2018016369A - Manufacturing method of household thin paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a household thin paper, which can secure the bulkiness of the household thin paper and prevent deterioration of wiping property. SOLUTION: An embossing step of forming an embossed EM1 on a household tissue paper (toilet cleaner 100) and an uneven pattern (convex portion 141) based on the shape of the embossed EM1 are formed on a contact surface with the household tissue paper on which the embossed EM1 is formed. The formed pressing belt 14 presses the household thin paper on which the embossed EM1 is formed to make the height constant, and then wraps the household thin paper having a constant height. [Selection diagram] Fig. 7

Description

  The present invention relates to a method for manufacturing household thin paper.

  At present, household thin paper such as toilet cleaners and kitchen cleaners are generally made of a single sheet by plying multiple sheets of crepe paper to improve the texture, absorbency and bulkiness. Is used. And embossing is given in order to improve the surface strength and bulkiness of such household thin paper.

For example, an opening pattern net and an opening pattern structure are provided on a conveyor belt (part that absorbs moisture) in the paper making process, and patterning of irregularities in the pattern applying process is performed by applying a specific amount of heat. A method for producing a bulky paper rich in bulkiness and absorptivity is disclosed (see, for example, Patent Document 1).
Further, a method for producing a high bulk tissue paper web is disclosed by providing a concavo-convex belt in a pressing step (press felt) of a crepe tissue paper making machine, and providing concavo-convex simultaneously with dehydration (for example, Patent Document 2).

  By the way, in order to stabilize the quality of products that wrap a plurality of thin paper sheets for household use (in a stacked state), after embossing the ply-processed base paper, the web height is made constant by the presser belt. Need to be packaged.

Japanese Patent No. 3461122 Japanese Patent No. 5504169

However, in the packaging method in which the web height is made constant with the presser belt, the embossing imparted to the household thin paper is crushed by the press with the presser belt, and thus there is a problem that the bulkiness as designed cannot be obtained. is there.
The techniques described in Patent Document 1 and Patent Document 2 are techniques for ensuring bulkiness by providing an uneven pattern (emboss) simultaneously with the suction of moisture in the paper suction part. It did not solve the above problems in the packaging process.

  An object of the present invention is to provide a method for producing household thin paper that can ensure the bulkiness of household thin paper and prevent deterioration of wiping properties.

The invention described in claim 1 has been made to achieve the above object,
In the manufacturing method of household thin paper,
Embossing process to form embossing on household thin paper,
After pressing the household thin paper on which the emboss is formed by pressing the household thin paper on which the emboss is formed with a pressing belt in which an uneven pattern based on the shape of the emboss is formed on the contact surface with the household thin paper on which the emboss is formed, , A packaging process for packaging the thin paper for household use of the certain height,
It is characterized by having.

Invention of Claim 2 is the manufacturing method of the household thin paper of Claim 1,
Having a chemical solution impregnation step of impregnating the thin tissue paper for home use with the chemical solution impregnated,
In the packaging step, the household thin paper impregnated with the chemical solution is pressed by the pressing belt to make the height constant, and then the household thin paper having the constant height is packaged.

Invention of Claim 3 is the manufacturing method of the household thin paper of Claim 1 or 2,
The pressing belt is characterized in that a convex portion based on the shape of the emboss is formed on a contact surface with the household thin paper.

Invention of Claim 4 is a manufacturing method of the household thin paper of Claim 3,
The convex portions are formed in a spot shape and are arranged at a predetermined pitch.

The invention according to claim 5 is the method for producing the household thin paper according to claim 4,
The convex part is characterized in that a concave part is formed at the tip part.

  ADVANTAGE OF THE INVENTION According to this invention, the bulkiness of household thin paper can be ensured and deterioration of wiping off can be prevented.

It is a top view which shows an example of the household thin paper which concerns on this embodiment. It is a flowchart which shows the manufacturing method of the household thin paper which concerns on this embodiment. It is a schematic diagram which shows an example of the manufacturing equipment (solution provision equipment) of the household thin paper which concerns on this embodiment. It is a schematic diagram which shows an example of the manufacturing equipment (processing equipment) of the household thin paper which concerns on this embodiment. It is a side view which shows the whole structure of a pressing belt. It is the perspective view which shows the structure of a holding | suppressing belt, and the side surface sectional drawing in an E1-E1 line. It is side surface sectional drawing which shows an example of the upper pressing belt at the time of conveyance of the laminated body of household thin paper, and an uppermost household thin paper. It is the perspective view which shows the structure of the pressing belt which concerns on the modification 1, and the side surface sectional drawing in the E2-E2 line. It is the perspective view which shows the structure of the pressing belt which concerns on the modification 2, and the side surface sectional drawing in an E3-E3 line. It is the perspective view which shows the structure of the pressing belt which concerns on the modification 3, and the side surface sectional drawing in the E4-E4 line. It is the perspective view which shows the structure of the pressing belt which concerns on the modification 4, and the side surface sectional drawing in the E5-E5 line.

  Hereinafter, a household thin paper according to an embodiment of the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

  In the present embodiment, a toilet cleaner 100 will be described as an example of household thin paper manufactured according to the present invention. The household thin paper of the present invention includes wet tissue impregnated with water and chemicals for wiping purposes other than toilet cleaners, and kitchen paper and tissue paper for dry wiping purposes. In addition, the short direction of the toilet cleaner 100 is described as the X direction, and the longitudinal direction of the toilet cleaner 100 is described as the Y direction.

  The X direction of the toilet cleaner 100 is the direction (machine direction) of the paper on the paper machine (machine direction (MD direction)), and the Y direction of the toilet cleaner 100 is the width of the paper machine (flow line). Direction (cross machine direction (CD direction)).

[Composition of toilet cleaner 100]
The toilet cleaner 100 manufactured according to the present embodiment is obtained by plying (stacking) a plurality of base papers, and a predetermined chemical solution is applied thereto. Moreover, as shown in FIG. 1, circular embossing EM1 is given to the whole sheet | seat surface of the toilet cleaner 100 by embossing. In this embodiment, the embossing EM1 is formed on the entire surface of the toilet cleaner 100. However, the present invention is not limited to this, and the embossing EM1 is formed on a part of the toilet cleaner 100 sheet. There may be.

  Further, the toilet cleaner 100 is folded into two, for example, at the center in the longitudinal direction (Y direction) by being folded. Then, it is stored in a folded plastic case, packaging film, etc. in a folded state, and is expanded and used as needed during use. Note that the method of folding the toilet cleaner 100 is not limited to two, and may be, for example, four or eight.

  Moreover, the toilet cleaner 100 of this embodiment is comprised from the water-decomposable fiber assembly so that it can be discarded as it is in the toilet bowl after cleaning the toilet.

  As the fiber assembly, natural fibers, synthetic fibers, fibers mixed with these, or the like can be used, and there is no particular limitation as long as the fiber assembly has water decomposability. Suitable raw material fibers include cellulose fibers such as wood pulp, non-wood pulp, rayon and cotton, and biodegradable fibers made of polylactic acid. Moreover, in order to improve the intensity | strength of a base material, you may mix | blend or apply and apply | coat polyvinyl alcohol (PVA), carboxymethylcellulose (CMC), etc. as a water-soluble binder.

  The toilet cleaner 100 of the present embodiment is coated with a predetermined chemical solution. Specifically, in addition to the aqueous cleaning agent, auxiliary agents such as a fragrance, an antiseptic, a disinfectant, and a paper strength enhancer are added. A predetermined chemical solution is applied.

  As the chemical solution, an appropriate one can be used. For example, as the aqueous cleaning agent, a surfactant or a lower or higher (aliphatic) alcohol can be used. As a fragrance | flavor, 1 type or several types can be suitably selected and used out of oil-based fragrance | flavors, such as orange oil other than an aqueous | water-based fragrance | flavor. As the preservative, for example, parabens such as methyl paraben, ethyl paraben, propyl paraben and the like can be used. As the disinfectant, alcohol, paraoxybenzoic acid ester, quaternary ammonium salt of monomer, cetylpyridinium chloride, phenoxyethanol, or the like can be used. As the paper strength enhancer, boric acid, various metal ions, and the like can be used.

  In addition, the above-mentioned auxiliary agent for the component of the chemical solution can be appropriately selected, and a component that performs other functions may be included in the chemical solution as necessary.

[Manufacturing method of toilet cleaner 100]
Next, a method for manufacturing the toilet cleaner 100 will be described with reference to FIGS.
In the manufacturing method of the toilet cleaner 100, as shown in FIG. 2, first, a paper making process (S1) for making a paper to be a base paper is performed by a paper machine (not shown).

  Next, as shown in FIG. 2 and FIG. 3, in the solution application facility, continuous dry base paper 1 </ b> A fed out from a plurality of (for example, two) primary raw rolls 1, 1 each wound up a base paper that has been made, A ply processing step (S2) for plying 1A to form a ply continuous sheet 1B, a solution application step (S3) for applying a binder solution to the ply continuous sheet 1B to form a continuous sheet 1C, and drying the continuous sheet 1C A drying process (S4) and a slit / winding process (S5) for slitting and winding the dried continuous water-decomposable sheet 1D are performed. The number of primary rolls can be changed as long as there are two or more. However, in the following description, an example of using two primary rolls will be described.

  Next, as shown in FIGS. 2 and 4, in the processing facility, the continuous water-decomposable sheet 1 </ b> D fed from the secondary raw roll 11 wound in the slit / winding step (S <b> 5) is embossed. An embossing process (S6) and a finishing process (S7) for finishing the embossed sheet 1E that has been embossed are performed.

[Paper making process]
In the papermaking step (S1) of the present invention, for example, a papermaking raw material is made by a known wet papermaking technique to form a base paper sheet. That is, after making the papermaking raw material into a wet paper state, it is dried by a dryer or the like to form a base paper sheet such as thin paper or crepe paper.

  As a raw material of the base paper sheet, for example, known virgin pulp, waste paper pulp and the like can be used, and at least pulp fibers are included. As the pulp used as the raw material, a blend of LBKP and NBKP in an appropriate ratio is particularly suitable. In addition, rayon fiber, synthetic fiber, etc. may contain as fibers other than a pulp fiber.

The base paper sheet of the present invention contains an anionic acrylamide polymer (hereinafter referred to as “anionic PAM”) as a flocculant. An anionic PAM is a polymer obtained by copolymerizing an acrylamide monomer and an anionic monomer.
Examples of the acrylamide monomer include acrylamide alone or a mixture of acrylamide and the following nonionic monomer copolymerizable with acrylamide. Nonionic monomers copolymerizable with acrylamide include methacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, N-isopropylacrylamide, N-isopropylacrylamide, N-hydroxyethylacrylamide, diacetone. Examples include acrylamide, acryloylmorpholine, N-acryloylpyrrolidine, N-acryloylpiperidine, N-vinylrolidone, N-vinylformamide, and N-vinylacetamide. These may be used alone or in combination of two or more.
Examples of the anionic monomer include acrylic acid, methacrylic acid, acrylamide-2-methylpropanesulfonic acid, itaconic acid, maleic acid, fumaric acid, and neutralized salts thereof.
A monomer such as styrene, acrylonitrile, (meth) acrylic acid ester, or the like may be blended as long as the water solubility of the anionic PAM is not impaired.
The addition amount of the anionic PAM is preferably about 10 to 1000 ppm. By making paper using such an anionic flocculant having the same charge as pulp, the aggregation of the base paper sheet can be reduced, and the water disintegrability can be improved by capillary action.

  In addition to the above-described pulp and flocculant, papermaking chemicals such as a wet paper strength agent, an adhesive, and a release agent may be appropriately used for the base paper sheet.

  In the present embodiment, in the paper making process, adjustment is performed so that the ratio of vertical and horizontal fiber orientations (vertical / horizontal) of the base paper sheet is 0.8 to 2.0, preferably 1.0. The fiber orientation can be adjusted, for example, by adjusting the angle at which the papermaking raw material is supplied to the wire part in a paper machine. The angle at which the papermaking raw material is supplied can be determined, for example, by adjusting the slice opening degree of the head box. Or it is good also as adjusting fiber orientation by giving a vibration in the direction orthogonal to the conveyance direction (running direction) of a paper machine.

[Continuous dry base paper]
As physical properties of the continuous dry base paper 1A, the basis weight is preferably about 15 to 75 gsm. Moreover, the basis weight of the ply-processed sheet containing the water-soluble binder (continuous water-decomposable sheet 1D) is about 30 to 150 gsm. The basis weight is based on JIS P 8124.
The continuous dry base paper 1A becomes a ply-processed hydrolyzed paper through a ply processing step (S2), a solution application step (S3), a drying step (S4), and a slit / winding step (S5), which will be described later. The toilet cleaner 100 is processed through an embossing process (S6) and a finishing process (S7).

[Ply processing process]
Next, in the ply processing step (S2), as shown in FIG. 3, the continuous dry base papers 1A and 1A continuously fed out from the raw roll 1 are ply processed along the continuous direction to obtain a ply continuous sheet 1B. Is supplied to the superimposing unit 2. The overlapping portion 2 is composed of a pair of rolls, and plies each continuous base paper 1A, 1A to form a ply continuous sheet 1B subjected to ply processing. In addition, when the continuous dry base papers 1A and 1A are overlapped, the continuous dry base papers 1A and 1A may be lightly fastened with pin embossing (contact embossing) so that they are not easily displaced.

[Binder solution]
The binder solution contains carboxymethyl cellulose (CMC) as a water-soluble binder. The concentration of carboxymethylcellulose in the binder solution is 1 to 30% by weight, preferably 1% by weight or more and less than 4% by weight.

  On the other hand, the degree of etherification of CMC is desirably 0.6 to 2.0, particularly 0.9 to 1.8, and more preferably 1.0 to 1.5. The expression of water disintegration and wet paper strength is very good.

  Moreover, CMC can use a water-swellable thing. This demonstrates the function of tying together the fibers constituting the sheet while remaining unswelled by crosslinking of specific metal ions in the chemical solution, and can exhibit strength as a wiping sheet that can withstand cleaning and wiping operations.

  Ingredients other than carboxymethylcellulose in the binder solution include polyvinyl alcohol, starch or derivatives thereof, hydroxypropylcellulose, sodium alginate, tolton gum, guar gum, xanthan gum, gum arabic, carrageenan, galactomannan, gelatin, casein, albumin, pull plan, poly Examples thereof include binder components such as ethylene oxide, viscose, polyvinyl ethyl ether, polyacrylic acid soda, polymethacrylic acid soda, polyacrylamide, hydroxylated derivatives of polyacrylic acid, and polyvinylpyrrolidone / vinylpyrrolidone vinyl acetate copolymer.

It is preferable to use a water-soluble binder having a carboxyl group from the viewpoint of good water decomposability and the point that wet strength can be expressed by a crosslinking reaction.
The water-soluble binder having a carboxyl group is an anionic water-soluble binder that easily forms a carboxylate in water. Examples thereof include polysaccharide derivatives, synthetic polymers, and natural products. Examples of the polysaccharide derivative include a salt of carboxymethyl cellulose, carboxyethyl cellulose or a salt thereof, carboxymethylated denven or a salt thereof, and an alkali metal salt of carboxymethyl cellulose is particularly preferable.

  Examples of the synthetic polymer include a salt of an unsaturated carboxylic acid polymer or copolymer, a salt of a copolymer of an unsaturated carboxylic acid and a monomer copolymerizable with the unsaturated carboxylic acid, and the like. Examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic anhydride, maleic acid, and fumaric acid. Examples of monomers that can be copolymerized with these include esters of these unsaturated carboxylic acids, vinyl acetate, ethylene, acrylamide, and vinyl ether. Particularly preferred synthetic polymers are those using acrylic acid or methacrylic acid as the unsaturated carboxylic acid. Specifically, polyacrylic acid, polymethacrylic acid, acrylic acid-methacrylic acid copolymer salt, acrylic acid or methacrylic acid. Examples thereof include a salt of a copolymer of an acid and an alkyl acrylate or an alkyl methacrylate. Examples of natural products include sodium alginate, xanthan gum, gellan gum, tarragant gum, pectin and the like.

[Solution application process]
Next, in the solution application step (S3), as shown in FIG. 3, on both outer surfaces of the ply continuous sheet 1B (the surfaces where the continuous dry base papers 1A and 1A do not face each other when the continuous dry base papers 1A and 1A are plyed). The above-mentioned binder solution is sprayed by the two-fluid spray nozzles 3 and 3 to produce a continuous sheet 1C.
In addition, as a spraying method of a binder solution, you may make it spray the above-mentioned binder solution on the one outer surface of the ply continuous sheet 1B.

The two-fluid spray nozzle 3 is a spray nozzle that mixes and sprays compressed air and liquid divided into two systems, compared to a one-fluid spray nozzle that sprays compressed liquid alone, The liquid can be sprayed finely and uniformly.
When a two-fluid spray nozzle is used in the present embodiment, a binder solution (viscosity 400 to 1200 MPa.s) is applied to each outer surface of the ply-processed ply continuous sheet 1B with a high pressure (injection pressure of 1.5 MPa or more). Since it is applied, it is easy to impregnate the binder solution in the thickness direction of the sheet.
On the other hand, when a one-fluid spray nozzle is used in the present embodiment, a binder solution (viscosity 400 to 1200 MPa.s) is applied to the outer surface of each ply-processed ply continuous sheet 1B at an injection pressure of 1.5 MPa or less. Thus, the binder solution is easily impregnated in the thickness direction of the sheet, and the binder solution is easily applied uniformly on the sheet surface.
In this way, by spraying the binder solution onto the outer surface of the ply continuous sheet 1B, the toilet cleaner 100 is centered in the thickness direction (when applied on both sides) or non-coated with the binder solution (when applied on one side). Since the content of the water-soluble binder increases as it goes from the surface to the application surface of the binder solution, the surface strength can be improved while ensuring water disintegration, and the toilet cleaner 100 is less likely to be damaged even when rubbed strongly. Can be manufactured.

[Drying process]
Next, in the drying step (S4), as shown in FIG. 3, in the drying equipment 4, the insoluble liquid in the binder solution of the above-mentioned continuous sheet 1C is evaporated, and the active ingredient, particularly CMC, is applied to the fibers. Let it settle.
Here, since the amount of the binder solution that permeates decreases from the outer surface of the continuous sheet 1C toward the inside in the thickness direction, the fixing amount of CMC decreases toward the inside in the thickness direction. Therefore, when the chemical solution is impregnated in the finishing step (S7), the cross-linking reaction hardly occurs as it goes inward in the thickness direction, and there are many voids, so that the chemical solution is confined inside the sheet. it can. Thereby, the toilet cleaner 100 obtained can be made hard to dry.
As the drying equipment 4, a hooded dryer equipment that blows hot air on the continuous sheet 1C to dry it can be used. In order to make the sheets more closely contact each other, a press roll or a turn roll may be installed, and the continuous sheet 1C may be passed through the press roll or the turn roll before the drying step (S4).

  Moreover, you may use the installation by infrared irradiation as said drying installation. In this case, a plurality of infrared irradiation units are arranged in parallel in the conveying direction of the continuous sheet 1C, and drying is performed by irradiating the continuous sheet 1C to be conveyed with infrared rays. Since moisture is generated by infrared rays and dried, uniform drying is possible as compared with a dryer using hot air, and wrinkles can be prevented from occurring in the subsequent slit / winding process.

[Slit and winding process]
Next, in the slit / winding step (S5), in order to make the ply-processed continuous water-decomposable sheet 1D with an off-line processing machine, it is dried in the above-described drying step (S4), and is made of CMC. While adjusting the tension of the continuous water-decomposable sheet 1D that has been fixed, it is slit to a predetermined width by the slitter 5 and wound by the winder facility 6. The winding speed is appropriately determined in consideration of the ply processing step (S2), the solution application step (S3), and the drying step (S4). Note that if it is too early, the sheet will break, and if it is too late, wrinkles will occur.
In the slit / winding step (S5), the continuous water-decomposable sheet 1D subjected to the ply process is pressure-bonded, whereby the continuous water-decomposable sheet 1D is more integrated and becomes a sheet corresponding to one sheet.

[Embossing process]
Next, in the embossing step (S6), as shown in FIG. 4, the embossing roll 12 embosses the entire surface of the sheet with a predetermined shape on the continuous water-decomposable sheet 1D fed from the secondary raw roll 11. Processing is applied. This embossing is performed for the purpose of improving the strength, bulkiness, wiping property and the like of the sheet, as well as the design.

[Finishing process]
Next, in the finishing step (S7), as shown in FIG. 4, the finishing processing facility 13 cuts the embossed sheet 1E, folds each cut sheet, and applies the above-described folding to each sheet. The impregnation of the chemical solution and the packaging of each sheet impregnated with the chemical solution are performed in a series of flows. Here, when CMC is used as the water-soluble binder, the cross-linking agent contained in the chemical solution is preferably a polyvalent metal ion. In particular, the use of one or more polyvalent metal ions selected from the group consisting of alkaline earth metals, manganese, zinc, cobalt, and nickel allows the fibers to be sufficiently bonded to withstand use. It is preferable from the standpoint that strength is developed and water disintegration is sufficient. Of these metal ions, it is particularly preferable to use ions of calcium, strontium, barium, zinc, cobalt, and nickel.

In the present embodiment, after impregnation with the chemical solution, a predetermined number of sheets are stacked by a counter (not shown). Then, the sheet stack 110 is conveyed while being regulated (pressed / clamped) so as to have a constant height by a pressing belt 14 (see FIG. 5) provided in the finishing processing equipment 13, and packaging processing is performed. That is, the finishing process of this embodiment includes the packaging process of the present invention.
As shown in FIG. 5, the pressing belt 14 includes an upper pressing belt 15 and a lower pressing belt 16 that rotate in the directions indicated by the arrows. The pressing belt 14 is configured to be conveyed to the packaging process in a state where the laminated body 110 of sheets is sandwiched between the pressing belts 15 and 16.

  The holding belt 14 can maintain the shape of rubber, silicon, resin (polyester, aramid resin, Teflon (registered trademark), etc.), has durability that can withstand high-speed operation, and a sheet during conveyance. It is made of a material that won't damage. In addition, you may make it give the surface processing which makes the surface rough like a felt for the purpose of slip prevention at the time of conveyance. Moreover, you may make it form with metals, such as stainless steel (rust prevention process).

As shown in FIGS. 6A and 6B, the presser belt 14 (upper presser belt 15) has a shape of the emboss EM1 on the contact surface with the sheet (toilet cleaner 100) on which the emboss EM1 is formed. The convex part 141 which is the uneven | corrugated pattern based is formed. The convex portion 141 protrudes toward the contact surface with the sheet at a predetermined interval and extends in a direction orthogonal to the conveyance direction. The lower presser belt 16 has the same configuration as the upper presser belt 15 except that the upper presser belt 15 is disposed so as to be reversed, and thus the description thereof is omitted.
By forming the convex portion 141 based on the shape of the embossing EM1 on the contact surface of the pressing belt 14 with the sheet, the embossing EM1 of the sheet is accommodated between the convex portions 141 of the pressing belt 14 as shown in FIG. Therefore, the shape of the emboss EM1 can be maintained.
In the present embodiment, the emboss EM1 is not formed on a fold formed in a direction orthogonal to the sheet conveyance direction. When the sheet is conveyed, the fold line is aligned with the position in the width direction of the upper pressing belt 15 so that the convex portion 141 of the pressing belt 14 is conveyed so as not to contact the emboss EM1. Thereby, it becomes possible to hold | maintain the shape of embossing EM1 reliably.
The toilet cleaner 100 is manufactured through the above steps.

  In addition, the shape of the pressing belt 14 is not limited to the example shown in FIG. Hereinafter, modified examples of the pressing belt 14 will be described with reference to FIGS. 8 to 11 are all modifications of the upper presser belt 15, but the lower presser belt 16 is also arranged with the upper presser belt 15 reversed as in the embodiment. Except for the point, it has the same configuration as the upper holding belt

As shown in FIGS. 8A and 8B, the pressing belt 14 </ b> A (upper pressing belt 15 </ b> A) according to Modification 1 has a wider interval between the convex portions 141 </ b> A than the pressing belt 14 according to the embodiment. It is formed to become.
According to the configuration according to the modified example 1, since the contact area with the sheet can be reduced as compared with the presser belt 14 according to the embodiment, the contact with the emboss EM1 of the uppermost layer of the stacked body 110 of sheets is suppressed. It becomes possible, and the maintenance rate of embossing EM1 can be improved. Moreover, it becomes possible to suppress the exudation of a chemical | medical solution, and the retention rate of a chemical | medical solution can be improved.

As shown in FIGS. 9A and 9B, the pressing belt 14B (upper pressing belt 15B) according to Modification 2 is compared with the pressing belt 14 according to the embodiment and the pressing belt 14A according to Modification 1. The protrusion 141B does not extend in the direction orthogonal to the transport direction, and is different in that it is formed in a spot shape (dot shape) at a predetermined pitch.
According to the configuration according to the second modification, compared to the pressing belt 14 according to the embodiment and the pressing belt 14A according to the first modification, the contact area with the sheet can be made extremely small. Contact with the uppermost embossed EM1 can be further suppressed, and the retention rate of the embossed EM1 can be further improved. Moreover, it becomes possible to further suppress the exudation of the chemical solution, and the retention rate of the chemical solution can be further improved.

As shown in FIGS. 10A and 10B, the pressing belt 14C (upper pressing belt 15C) according to Modification 3 has a larger convex portion 141C than the pressing belt 14B according to Modification 2. The difference is that a larger number of convex portions 141C are formed.
According to the configuration according to the modification 3, the ground contact area with the sheet can be reduced as compared with the presser belt 14 according to the embodiment, as in the configurations according to the modifications 1 and 2. Contact with the uppermost embossed EM1 can be suppressed, and the retention rate of the embossed EM1 can be improved. Moreover, it becomes possible to suppress the exudation of a chemical | medical solution, and the retention rate of a chemical | medical solution can be improved.

As shown in FIGS. 11 (A) and 11 (B), the pressing belt 14D (upper pressing belt 15D) according to the modification 4 is formed at the tip of the convex portion 141D as compared with the pressing belt 14C according to the modification 3. The difference is that a recess 142D is formed.
According to the configuration according to the modification example 4, the contact area with the sheet can be reduced as compared with the presser belt 14C according to the modification example 3, so that the contact with the emboss EM1 of the uppermost layer of the sheet stack 110 is suppressed. It becomes possible to improve the maintenance rate of embossing EM1. Moreover, it becomes possible to suppress the exudation of a chemical | medical solution, and the retention rate of a chemical | medical solution can be improved.

  Next, one of the sheets (toilet cleaner 100) respectively conveyed by the respective pressing belts 14, 14A to 14D of the present invention and a conventional flat pressing belt (not shown) in which the convex portions 14 are not formed. The results of evaluating the retention rate of the embossed EM1 and the retention rate of the chemical solution of the first (top layer) will be described with reference to Table 1. Hereinafter, an example using a conventional pressing belt will be referred to as a comparative example, and examples using the pressing belts 14 and 14A to 14D of the present invention will be referred to as Examples 1 to 5, respectively.

<Conditions for implementation>
・ Base paper conditions Base paper: 100% pulp
Weighing (dry state): 90 g / m ²
Number of plies: 2 plies / chemical solution conditions Chemical solution components: polyhydric alcohol, surfactant, disinfectant, orange extract, silicone embossing conditions (see FIG. 1): the convex part is a circle with a diameter (h1 in the figure) of 2.5 mm , Lattice array
Emboss pitch (h2 in the figure) 7mm
Distance between adjacent protrusions in side view (h3 in the figure) 1 mm
Presser belt condition Presser belt (Example 1): pitch of convex part 7 mm
Contact area with sheet: 1 mm width Presser belt (Example 2): Pitch pitch of 14 mm
Contacting area with sheet 1 mm width Presser belt (Example 3): Convex part with a 1 mm diameter flat surface at the tip
Pitch pitch 14mm
7mm spacing between adjacent projections in side view
Presser belt (Example 4): Pitch pitch of 7 mm
Grounded at the point of the sheet Presser belt (Example 5): Pitch of projection 7 mm
The sheet is grounded with a 3mm diameter wire

<Test method>
Ten sheets impregnated with 170% of a chemical solution are laminated, and a mold of each (upper) pressing belt and a weight for applying a load are placed on the laminated body 110. The weight is placed so as to be weighted by 50 g. Then, the weight of the weight when the height of the laminated body 110 reaches the target 50 mm is recorded, and the appearance (maintenance rate) of the emboss EM1 of the uppermost layer and the retention rate of the chemical solution are confirmed. In addition, the maintenance rate of embossing EM1 is calculated based on the ratio by which embossing EM1 was completely crushed and became a flat state with respect to the number of embossing EM1 of the whole sheet | seat, for example. Further, the retention rate of the chemical solution is calculated based on, for example, the weight before and after the uppermost sheet of the laminate 110 passes through the pressing belt.

  As the results shown in Table 1, in Examples 1 to 5, the contact area between the pressing belt and the sheet is smaller than that of the comparative example, so that contact with the embossed EM1 of the uppermost layer of the sheet is suppressed. It was found that the maintenance rate was improved. Further, it was found that, as the contact area decreases, the exudation of the chemical solution is suppressed and the retention rate of the chemical solution is improved. That is, as in the present invention, by forming a concavo-convex pattern (projection 14 or the like) based on the shape of the emboss EM1 on the contact surface with the sheet (household thin paper) on which the emboss EM1 is formed, It was found that the retention rate of the emboss EM1 and the retention rate of the chemical solution can be improved.

  Further, as shown in Table 1, Example 2 (Modification 1: see FIG. 8) has a smaller ground contact area between the pressing belt and the seat than Example 1 (see Embodiment: FIG. 6). It was found that contact with the embossed EM1 on the uppermost layer of the sheet was further suppressed, and the retention rate of the embossed EM1 and the retention rate of the chemical solution were further improved.

  In addition, as shown in Table 1, Example 3 (Modification 2: Refer to FIG. 9) and Example 5 (Modification 4: Refer to FIG. 11) in which the convex portions are formed in a spot shape (dot shape) Compared to Example 1 (embodiment: refer to FIG. 6) and Example 2 (embodiment: refer to FIG. 6) in which the convex portion extends in a direction orthogonal to the conveying direction, the contact between the pressing belt and the sheet Since the area was reduced, it was found that the retention rate of the emboss EM1 and the retention rate of the chemical solution were further improved.

  Further, as shown in Table 1, in Example 4 (Modification 3: see FIG. 10) in which the convex portions are formed in a spot shape (dot shape), the convex portions extend in a direction perpendicular to the transport direction. Compared to Example 2 (Modification 1: refer to FIG. 8), the embossing EM1 retention rate and chemical retention rate are improved even when the contact area of the pressing belt and the seat is the same. Therefore, it was found that the configuration in which the convex portions are formed in a spot shape (dot shape) is more effective than the configuration in which the convex portions are extended in the direction orthogonal to the transport direction.

In the examples, 2-ply (90 g / m ² ) base paper is used, but the same effect was obtained even when 3-ply (90 g / m ² ) base paper was used. It was confirmed.

As described above, the manufacturing method of the household thin paper (toilet cleaner 100) according to the present embodiment is provided on the contact surface between the embossing step of forming the emboss EM1 on the household thin paper and the household thin paper on which the embossing EM1 is formed. After pressing the household thin paper on which the embossed EM1 is formed with the pressing belt 14 on which the concave and convex pattern (convex portion 141) based on the shape of the embossed EM1 is formed, the height is made constant, and then the household is used with a certain height. And a packaging process for packaging thin paper.
Therefore, according to the method for manufacturing household thin paper according to the present embodiment, when the household thin paper is conveyed in the packaging process, the ground contact area between the pressing belt 14 and the household thin paper can be reduced. Contact with the uppermost embossed EM1 can be suppressed, and the retention rate of the embossed EM1 can be improved. Therefore, since the bulk of household thin paper can be ensured, it is possible to prevent deterioration of wiping properties caused by the embossing EM1 being crushed, and to ensure the quality of household thin paper.

Moreover, the manufacturing method of the household thin paper which concerns on this embodiment has the chemical | medical solution impregnation process of impregnating a chemical | medical solution to the household thin paper in which the embossing EM1 was formed. Further, in the packaging process, the household thin paper impregnated with the chemical solution is pressed by the pressing belt 14 to make the height constant, and then the household thin paper having a certain height is packaged.
Therefore, according to the method for manufacturing household thin paper according to the present embodiment, the ground contact area between the pressing belt 14 and the household thin paper can be reduced when the household thin paper is conveyed in the packaging process. It is possible to suppress excessive exudation of the chemical liquid when pressed and sandwiched, and the retention rate of the chemical liquid can be improved. Therefore, it becomes possible to ensure the quality of household thin paper more reliably.

Further, according to the method for manufacturing household thin paper according to the present embodiment, the pressing belt 14 has the convex portion 141 based on the shape of the emboss EM1 on the contact surface with the household thin paper.
Therefore, according to the method for manufacturing household thin paper according to the present embodiment, when the household thin paper is conveyed in the packaging process, the ground contact area between the pressing belt 14 and the household thin paper can be reduced. The maintenance rate of the emboss EM1 of the uppermost layer and the retention rate of the chemical solution can be improved.

Further, according to the method for manufacturing household thin paper according to this embodiment, the convex portions 141B, 141C, and 141D are formed in a spot shape and arranged at a predetermined pitch.
Therefore, according to the method for manufacturing household thin paper according to the present embodiment, even when the ground contact area of the pressing belt and the household thin paper is the same, the convex portion extends in a direction orthogonal to the conveying direction. Since it can control the contact with the embossed EM1 of the uppermost layer of household thin paper and excessive exudation of the chemical solution, the retention rate of the embossed EM1 of the uppermost layer of household thin paper and the retention rate of the chemical solution can be reduced. Further improvement can be achieved.

Further, according to the method for manufacturing household thin paper according to the present embodiment, the convex portion 141D has the concave portion 142D formed at the tip.
Therefore, according to the method for manufacturing household thin paper according to the present embodiment, the ground contact area between the pressing belt and the household thin paper can be reduced as compared with the configuration in which the concave portion 142D is not formed at the tip portion. It is possible to further improve the retention rate of the emboss EM1 of the uppermost layer and the retention rate of the chemical solution.

  As mentioned above, although concretely demonstrated based on embodiment which concerns on this invention, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

[Other variations]
Further, in the description of the embodiment of the present invention, regarding the shape of the pressing belt 14, the configuration in which the convex portion 141 based on the shape of the emboss EM 1 is formed on the contact surface with the toilet cleaner 100 will be described as an example. However, it is not limited to this. For example, instead of forming the convex portion 141 based on the shape of the embossed EM1, a concave portion based on the shape of the embossed EM1 is formed, and when the toilet cleaner 100 is transported, the embossed EM1 is accommodated in the concave portion. Also good.

  In the description of the embodiment of the present invention, a toilet cleaner is taken as an example. However, a wet sheet (wet sanitary thin paper) is used not only for toilet cleaners but also for all paper products (for example, kitchen cleaners). be able to. Moreover, it can be used not only for wet sanitary thin paper but also for dry sanitary thin paper.

  Further, in the description of the embodiment of the present invention, as a material of the toilet cleaner 100, a water-decomposable fiber aggregate is taken as an example. However, the present invention is not limited to this, and general paper using pulp and nonwoven fabric fibers is included.

  In the description of the embodiment of the present invention, the upper pressing belt 15 and the lower pressing belt 16 have the same configuration as an example. However, the present invention is not limited to this, and at least either the upper pressing belt 15 or the lower pressing belt 16 is used. A concave / convex pattern (such as the convex portion 141) based on the shape of the crab emboss EM1 may be formed.

  Further, in the description of the embodiment of the present invention, the point that the effect of the present invention can be obtained under the base paper condition and the chemical solution condition shown in the implementation condition of the example is described, but the present invention is not limited to this. That is, the present invention can obtain the effect regardless of the chemical solution and the base paper conditions.

  In the description of the embodiment of the present invention, a circular shape is illustrated as the shape of the emboss EM1, but the shape of the emboss may be any shape such as an ellipse, a rectangle, and a polygon.

  In addition, the detailed configuration of the toilet cleaner 100 can be changed as appropriate without departing from the spirit of the present invention.

100 Toilet cleaner (household paper)
DESCRIPTION OF SYMBOLS 1 Primary raw fabric roll 1A Continuous dry base paper 1B Ply continuous sheet 1C Continuous sheet 1D Continuous water-decomposable sheet 1E Embossed sheet 2 Superposition part 3 Spray nozzle 4 Drying equipment 5 Slitter 6 Winder equipment 11 Secondary raw roll 12 Embossing roll 13 Finishing equipment EM11 Emboss

Claims (5)

Embossing process to form embossing on household thin paper,
After pressing the household thin paper on which the emboss is formed by pressing the household thin paper on which the emboss is formed with a pressing belt in which an uneven pattern based on the shape of the emboss is formed on the contact surface with the household thin paper on which the emboss is formed, , A packaging process for packaging the thin paper for household use of the certain height,
A method for producing household thin paper, comprising: Having a chemical solution impregnation step of impregnating the thin tissue paper for home use with the chemical solution impregnated,
The packaging step is characterized in that the household thin paper impregnated with the chemical solution is pressed with the pressing belt to make the height constant, and then the household thin paper with the constant height is packaged. 2. A method for producing a household thin paper according to 1.   The method for producing household thin paper according to claim 1, wherein the pressing belt has a convex portion formed on the contact surface with the household thin paper based on the shape of the emboss.   The method of manufacturing a household thin paper according to claim 3, wherein the convex portions are formed in a spot shape and arranged at a predetermined pitch.   5. The method for manufacturing household thin paper according to claim 4, wherein the convex part has a concave part formed at a tip part thereof.

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