EP3305983B1 - Wasserlösliches tuch - Google Patents

Wasserlösliches tuch Download PDF

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Publication number
EP3305983B1
EP3305983B1 EP16802897.5A EP16802897A EP3305983B1 EP 3305983 B1 EP3305983 B1 EP 3305983B1 EP 16802897 A EP16802897 A EP 16802897A EP 3305983 B1 EP3305983 B1 EP 3305983B1
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EP
European Patent Office
Prior art keywords
sheet
embossments
base paper
hydrolysable
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16802897.5A
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English (en)
French (fr)
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EP3305983A1 (de
EP3305983A4 (de
Inventor
Shinya Izumi
Asako Tanaka
Atsuko HASEZAWA
Shinpei MUKOYAMA
Kosuke Yamazaki
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Daio Paper Corp
Original Assignee
Daio Paper Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015110839A external-priority patent/JP6096245B2/ja
Priority claimed from JP2015110837A external-priority patent/JP6096244B2/ja
Application filed by Daio Paper Corp filed Critical Daio Paper Corp
Publication of EP3305983A1 publication Critical patent/EP3305983A1/de
Publication of EP3305983A4 publication Critical patent/EP3305983A4/de
Application granted granted Critical
Publication of EP3305983B1 publication Critical patent/EP3305983B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L13/00—Implements for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L13/10—Scrubbing; Scouring; Cleaning; Polishing
    • A47L13/16—Cloths; Pads; Sponges
    • A47L13/17—Cloths; Pads; Sponges containing cleaning agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K11/00—Closets without flushing; Urinals without flushing; Chamber pots; Chairs with toilet conveniences or specially adapted for use with toilets
    • A47K11/10—Hand tools for cleaning the toilet bowl, seat or cover, e.g. toilet brushes

Definitions

  • the present invention relates to a hydrolysable sheet.
  • reusable wiping cloths made of woven fabrics are used to clean toilets.
  • disposable wet sheets made of paper are used instead. It is preferable that such a wet sheet is provided in a state of being impregnated with a cleaning agent, and can be disposed of by being flushed down a toilet after use.
  • the wet paper impregnated with a cleaning agent is required to be strong enough to resist tearing at the time of wiping, and hydrolyzability is required so as not to clog a pipe or the like when being flushed down a toilet.
  • JP2011-030793A discloses a wet sheet having three layered structure which enables to satisfy both strength and water decomposability.
  • EP1630288A1 relates to a bulky, water-disintegratable cleaning article.
  • a hydrolysable sheet impregnated with a chemical solution containing a cleaning agent or the like is used as a wipe
  • a hydrolysable sheet that suppresses evaporation of water in the chemical solution is desired in order to develop a cleaning effect in work of wiping a target object.
  • the present invention has an object to provide a hydrolysable sheet that can suppress evaporation of water in a chemical solution.
  • Claim 11 defines the corresponding method.
  • hydrolysable sheet as the present invention, an example will be described in which the hydrolysable sheet is a toilet cleaning sheet 100.
  • a wet tissue impregnated with a chemical solution for cleaning/wiping is included as the hydrolysable sheet of the present invention.
  • a conveying direction of paper at the time of producing the toilet cleaning sheet 100 is described as the Y direction (longitudinal direction), and a direction perpendicular to the conveying direction is described as the X direction (lateral direction).
  • the toilet cleaning sheet 100 is obtained by applying a ply process to (obtained by stacking) a plurality of sheets (two sheets, for example) of base paper, and is impregnated with a predetermined chemical solution. Further, as illustrated in FIG. 1 , an embossing process is applied to the entire sheet surface of the toilet cleaning sheet 100 to have two types of embossments EM11 and EM12. It should be noted that it is preferable that a contact area generated between an object to be cleaned up or the like and the two types of embossments EM11 and EM22 is preferably 15 mm 2 to 30 mm 2 per 100 mm 2 .
  • unevenness of wiping can be reduced by arranging the embossments EM11 in rhomboid grids, in comparison with a case in which the embossments EM11 are arranged in square grids or rectangular grids. Further, the embossments EM12 are arranged between the embossments EM11.
  • the toilet cleaning sheet 100 of the embodiment is composed of a hydrolysable fiber assembly such that after cleaning a toilet, the toilet cleaning sheet 100 can be discarded in the water tank of the toilet bowl.
  • a fiber obtained by mixing leaf bleached kraft pulp (LBKP) with needle bleached kraft pulp (NBKB) is used as the fiber assembly.
  • a preferable fiber material has a compounding proportion of leaf bleached kraft pulp to components of the fiber material material fiber greater than 50% by weight. That is, a fiber of which a compounding ratio of needle bleached kraft pulp to leaf bleached kraft pulp is less than 1/1 is preferable.
  • a more preferable material fiber has a compounding proportion of leaf bleached kraft pulp to the components of the material fiber greater than 60% by weight. That is, a fiber of which a compounding ratio of needle bleached kraft pulp to leaf bleached kraft pulp is less than 2/3 is more preferable.
  • CMC carboxymethyl cellulose
  • the toilet cleaning sheet 100 of the embodiment is impregnated with a predetermined chemical solution.
  • the predetermined chemical solution contains auxiliary agents such as a perfume, a preservative agent, a sterilizing agent, a paper strength enhancing agent, and an organic solvent, in addition to an aqueous cleaning agent. It is preferable that, with respect to a weight of the base paper sheet that is the base material of the toilet cleaning sheet 100, the base paper sheet is impregnated with the predetermined chemical solution at 150% to 300% by weight.
  • any appropriate chemical solution may be used as the predetermined chemical solution.
  • a lower or higher (aliphatic) alcohol can be used as the aqueous cleaning agent.
  • the perfume in addition to an aqueous perfume, one or several kinds can be selected from among oily perfumes such as orange oil.
  • the preservative agent parabens such as methylparaben, ethylparaben, or propylparaben can be used, for example.
  • benzalkonium chloride chlorhexidine gluconate, povidone iodine, ethanol, cetyl benzanium oxide, triclosan, chloroxylenol, isopropylmethylphenol, or the like can be used, for example.
  • the paper strength enhancing agent cross-linking agent
  • boric acid various metal ions, or the like can be used.
  • organic solvent a polyhydric alcohol such as glycol (dihydric), glycerin (trihydric), or sorbitol (tetrahydric) can be used.
  • the organic solvent in the toilet cleaning sheet 100 of the embodiment, at least a polyhydric alcohol that is a trihydric or higher alcohol such as glycerin or sorbitol is used as the organic solvent.
  • a polyhydric alcohol that is a trihydric or higher alcohol such as glycerin or sorbitol
  • the base paper sheet is impregnated with this trihydric or higher alcohol at 1% to 20% by weight.
  • the upper limit of this content rate is 20% by weight.
  • a protruding part PR22 of each embossment EM12 has a planar shape.
  • the protruding parts PR21 of the embossments EM11 and the protruding parts PR22 of the EM12 are close to cohere, and thereby, a conjoined embossment EM 21 is formed as illustrated in FIG. 2C .
  • the protruding parts PR21 of the embossments EM11 and the protruding parts PR22 of the embossments EM12 may be simply close to each other without being conjoined.
  • embossments EM11 and EM12 effects of normal embossments can be similarly obtained, and texture, absorbability, bulkiness, and the like of the toilet cleaning sheet can be enhanced. Furthermore, by the conjoined embossment EM21, a good appearance effect based on applying the embossments can be obtained similar to normal embossments.
  • a papermaking process (S1) is performed by a papermaking machine (not illustrated) to prepare paper as base paper.
  • an embossing process (S6) is performed to emboss the continuous hydrolysable sheet 1D, wound in the above described slitting/winding process (S5) and fed from a secondary web roller 11.
  • a finishing process (S7) is performed to finish the embossed sheet 1E, to which the embossing process has been applied. Note that each of the processes will be described in detail later below.
  • a papermaking material is used by a known wet type papermaking technique to form the base paper sheet. That is, after wetting the papermaking material, the material is dried by a dryer or the like to form the base paper sheet such as tissue paper or crepe paper.
  • the base paper sheet such as tissue paper or crepe paper.
  • known virgin pulp, recycled paper pulp, or the like may be used, and at least a pulp fiber is included.
  • pulp obtained by mixing LBKP with NBKP in an appropriate proportion is suitable for the pulp to be the material.
  • a rayon fiber, a synthetic fiber, or the like may be contained as a fiber other than the pulp fiber.
  • the base paper sheet of the present invention contains, as a flocculant, an anionic acrylamide-type polymer (referred to as the "anionic PAM" in the following).
  • the anionic PAM is a polymer obtained by copolymerizing an acrylamide-type monomer and an anionic monomer.
  • the acrylamide-type monomer is acrylamide alone, or a mixture of acrylamide and a nonionic monomer, as follows, copolymerizable with acrylamide.
  • nonionic monomer copolymerizable with acrylamide examples include methacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, N-isopropylacrylamide, N-isopropylcrylamide, N-hydroxyethylacrylamide, diacetone acrylamide, acryloylmorpholine, N-acryloylpyrrolidine, N-acryloylpiperidine, N-vinylrolidone, N-vinylformamide, and N-vinylacetamide. One of them may be used or two or more kinds may be used in combination.
  • the continuous dry base paper 1A has, as a physical property, a basis weight approximately of from 15 gsm to 75 gsm. Further, a basis weight of the sheet (the continuous hydrolysable sheet 1D), containing the water-soluble binder, to which the ply process has been applied is approximately of from 30 gsm to 150 gsm. It should be noted that the basis weight is based on the standard of JIS P 8124.
  • the continuous dry base paper 1A becomes, through the ply process (S2), the solution adding process (S3), the drying process (S4), and the slitting/winding process (S5) that are described later below, hydrolysable paper, to which the ply process has been applied, and the hydrolysable paper is processed into the toilet cleaning sheet 100 through the embossing process (S6), and the finishing process (S7) that are described later below.
  • the ply process (S2) of the embodiment will be described.
  • the ply process is applied to the respective continuous dry base paper 1A and 1A, continuously fed from the web rollers 1, along the continuous direction, and the continuous dry base paper 1A and 1A are supplied to an overlapping part 2 to make the ply continuous sheet 1B.
  • the overlapping part 2 is composed of a pair of rolls and applies the ply process to the respective continuous base paper 1A and 1A to form the ply continuous sheet 1B, to which the ply process has been applied.
  • the continuous dry base paper 1A and 1A may be lightly fastened by pin embossments (contact embossments) so as not to misalign the continuous dry base paper 1A and 1A.
  • the binder solution contains carboxymethyl cellulose (CMC) as a water-soluble binder.
  • CMC carboxymethyl cellulose
  • the concentration of carboxymethyl cellulose in the binder solution is 1% to 30% by weight.
  • the concentration is preferably greater than or equal to 1% and less than 4% by weight.
  • a degree of etherification of CMC is preferably 0.6 to 2.0, is more preferably 0.9 to 1.8, and still more preferably 1.0 to 1.5. This develops excellent hydrolyzability and wet paper strength.
  • water swellable material may be used as CMC. This enables, through cross-linking a specific metal ion in the chemical solution, to exert a function to keep an un-swelled fiber constituting the sheet and to impart strength as a wiping sheet to withstand cleaning/wiping work.
  • a component other than carboxymethyl cellulose included in the binder solution is a binder component such as polyvinyl alcohol, starch or a derivative thereof, hydroxypropyl cellulose, sodium alginate, tranth gum, guar gum, xanthan gum, gum arabic, carrageenan, galactomannan, gelatin, casein, albumin, purplan, poly ethylene oxide, viscose, polyvinyl ethyl ether, sodium polyacrylate, sodium polymethacrylate, polyacrylamide, a hydroxylated derivative of polyacrylic acid, or a polyvinyl pyrrolidone/vinyl pyrrolidone vinyl acetate copolymer.
  • a binder component such as polyvinyl alcohol, starch or a derivative thereof, hydroxypropyl cellulose, sodium alginate, tranth gum, guar gum, xanthan gum, gum arabic, carrageenan, galactomannan, gelatin, casein, albumin, purplan
  • a water-soluble binder including a carboxyl group is an anionic water-soluble binder that easily generates a carboxylate within water.
  • An example of the binder is a polysaccharide derivative, a macromolecule, or a natural product.
  • the polysaccharide derivative may be a salt of carboxymethyl cellulose, carboxyethyl cellulose or a salt thereof, carboxymethylated starch or a salt thereof.
  • an alkali metal salt of carboxymethyl cellulose is preferable.
  • the synthetic macromolecule may be a salt of a polymer or a copolymer of unsaturated carboxylic acids, a salt of a copolymer of an unsaturated carboxylic acid and a monomer copolymerizable with the unsaturated carboxylic acid, or the like.
  • the unsaturated carboxylic acid may be acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic anhydride, maleic acid, fumaric acid or the like.
  • the monomer copolymarizable with these unsaturated carboxylic acids may be an ester of these unsaturated carboxylic acids, vinyl acetate, ethylene, acrylamide, vinyl ether, or the like.
  • a macromolecule that uses acrylic acid or methacrylic acid as an unsaturated carboxylic acid is particularly preferable.
  • polyacrylic acid, polymethacrylic acid, a salt of a copolymer of acrylic acid and methacrylic acid, or a salt of a copolymer of acrylic acid or methacrylic acid and alkyl acrylate or alkyl methacrylate is particularly preferable.
  • the natural product may be sodium alginate, xanthan gum, gellan gum, tragacanth gum, pectin or the like.
  • the solution adding process (S3) of the embodiment will be described.
  • the above descried binder solution is sprayed from respective two-fluid-type spray nozzles 3 and 3 on both external surfaces of the ply continuous sheet 1B (surfaces for which the continuous dry base paper 1A and 1A do not face each other at the time of applying the ply process to the continuous dry base paper 1A and 1A).
  • the water-soluble binder included in the binder solution can be added to the ply continuous sheet 1B.
  • a ply process may be applied to the continuous dry base paper 1A and 1A so as to generate a sheet equivalent to the above described continuous sheet 1C.
  • the binder solution (having viscosity of 400 MPa.s to 1200 MPa.s) to each of the external surfaces of the ply continuous sheet 1B to which the ply process has been applied, the binder solution is easily added in the thickness direction of the sheet.
  • the single-fluid-type spray nozzles apply, at a spraying pressure lower than or equal to 1.5 MPa, the binder solution (having viscosity of 400 MPa.s to 1200 MPa.s) to each of the external surfaces of the ply continuous sheet 1B to which the ply process has been applied, whereby the binder solution is easily added in the thickness direction of the sheet, and the binder solution is uniformly applied to the sheet surfaces.
  • the binder solution having viscosity of 400 MPa.s to 1200 MPa.s
  • the toilet cleaning sheet 100 that does not easily dry. Further, because a large amount of cross-linking reactions of CMC occur in the vicinities of the external surfaces of the continuous sheet 1C, it is possible to strengthen the surface strength of the obtained toilet cleaning sheet 100.
  • a dryer facility with a hood that supplies hot air to the continuous sheet 1C to dry the continuous sheet 1C can be used. It should be noted that, in order to cause the sheets to more firmly adhere to each other, pressing rollers or turning rollers may be installed and then the continuous sheet 1C is passed through the pressing rollers or the turning rollers before the drying process (S4).
  • a facility that emits an infrared ray may be used.
  • a plurality of infrared ray emitting parts are arranged in parallel in the conveying direction of the above described continuous sheet 1C, and infrared rays are emitted to the conveyed continuous sheet 1C to dry the sheet 1C. Because water is heated and dried by the infrared rays, the sheet can be uniformly dried and generation of wrinkles in the subsequent slitting/winding process can be prevented relative to a dryer using hot air.
  • the slitting/winding process (S5) of the embodiment will be described.
  • the sheet in order to obtain a web for when the continuous hydrolysable sheet 1D, to which the ply process has been applied, is processed by an off-line processing machine, while tension of the continuous hydrolysable sheet 1D, dried in the above described drying process (S4) and to which CMC has been fixed, is adjusted, the sheet is slit by a slitter 5 at a predetermined width and wound in a winder facility 6.
  • a winding speed is appropriately determined in consideration of the ply process (S2), the solution adding process (S3), and the drying process (S4).
  • the continuous hydrolysable sheet 1D to which the ply process has been applied, is pressure-joined such that the continuous hydrolysable sheet 1D is further unified to be a single sheet.
  • the embossing process (S6) of the embodiment will be described.
  • the continuous hydrolysable sheet 1D fed from the secondary web roller 11, is embossed by embossing rollers 12 to form predetermined shapes on the entire sheet surface.
  • the sheet is embossed in order to enhance design quality as well as to enhance strength, bulkiness, wiping performance, and the like of the sheet.
  • finishing process (S7) of the embodiment will be described.
  • a series of processes which include a process of cutting the embossed sheet 1E, a process of folding the respective cut sheets, impregnating the respective folded sheets with the above described chemical solution, and packaging the respective sheets impregnated with the above described chemical solution, are performed in a finishing facility 13.
  • a polyvalent metal ion in the cross-linking agent included in the chemical solution in a case where CMC is used as the water-soluble binder.
  • the toilet cleaning sheet 100 is produced.
  • the base paper sheet (continuous sheet 1C) is in a state in which the content of CMC increase from inside towards the front surface and the back surface in the thickness direction of the base paper sheet.
  • the base paper sheet is impregnated with the chemical solution containing a cross-linking agent, towards inside in the thickness direction, the cross-linking reaction is less likely to occur and voids increase. Accordingly, the chemical solution can be confined inside the sheet. In this way, it is possible to obtain the toilet cleaning sheet 100 that does not easily dry. Further, because a large quantity of cross-linking reactions of CMC occur in the vicinities of the external surfaces of the base paper sheet, it is possible to strengthen the surface strength of the obtained toilet cleaning sheet 100.
  • each of the embossments EM11 has the curved-shaped protruding part PR 21 and each of the embossments EM12 has the planar-shaped protruding part PR22, but the embossments are not necessarily limited to these shapes.
  • protruding parts of the embossments EM11 and the embossments EM12 may have planar shapes of differing heights.
  • each embossment EM11 may have a planar-shaped protruding part
  • each embossment EM12 may have a curved-shaped protruding part.
  • the embossments EM12 are arranged between the embossments EM11, each of which has the curved surface protruding part, but the embossments EM11 may intersect with each other.
  • embossments EM11 and EM12 protrude towards the near side with respect to the drawing of FIG. 1 , but embossments EM11 and EM12 having a convex shape towards the near side with respect to the drawing and embossments EM11 and EM12 having a concave shape towards the near side with respect to the drawing may be alternately arranged.
  • embossments EM11 and EM12 portions illustrated by solid lines), each of which has a convex shape towards the near side with respect to the drawing of FIG. 7
  • embossments EM11 and EM12 portions illustrated by dashed lines
  • each of which has a concave shape with respect to the near side of the drawing of FIG. 7 may be alternately arranged to provide a household tissue that has high wiping performance for both surfaces of the toilet cleaning sheet 100 as well as enhancing surface strength of the household tissue by being embossed.
  • the protruding parts PR21 of the embossments EM11 and the protruding parts PR22 of the EM12 are close to cohere to be formed as the conjoined embossment EM21.
  • the protruding parts PR21 of the embossments EM11 and the protruding parts PR22 of the EM12 may be simply close to each other without cohering.
  • each embossment EM11 has a circular shape or an elliptical shape, but the shape of each embossment may be any shape, such as a rectangular shape or a polygonal shape.
  • heights HT21 and HT22 of the protruding parts of the embossment EM11 and EM12 in FIG. 2 are 0.40 mm to 0.75 mm, for example. It should be noted that the surfaces are three-dimensionally measured by a digital microscope made by KEYENCE Co. to measure the heights HT21 and HT22 of the protruding parts of the embossments EM11 and EM12, for example.
  • the heights are less than 0.40 mm, friction at the time of wiping becomes stronger and the wiping becomes difficult.
  • the heights exceed 0.75 mm the shapes of the embossments EM11 and EM12 becomes easily deformed at the time of being packaged, and the appearance becomes worse.
  • the embossed pattern is not limited to the above described pattern, but may be embossed patterns as illustrated in FIGS. 8 to 10 .
  • concave portions e2 have shapes obtained by inverting convex portions e1.
  • the embossed pattern is formed such that the convex portions e1 and the concave portions e2 are alternately arranged in each of many lines and the convex portions e1 and the concave portions e2 in the adjacent lines are arrayed to be shifted with respect to each other by one-half pitch.
  • the convex portions e1 and the concave portions e2 are not particularly limited, and shapes such as circular shapes, elliptic shapes, and polygonal shapes may also be used. These shapes may be combined.
  • the present invention is preferably applicable to a field of producing a hydrolysable sheet.

Landscapes

  • Paper (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Claims (11)

  1. Hydrolysierbares Blatt (100), das durch Imprägnieren eines Rohpapierblatts, das mit einem wasserlöslichen Binder versehen ist, mit einer chemischen Lösung erhalten wird, wobei
    das Rohpapierblatt durch Anwenden eines Faltprozesses auf eine Mehrzahl von Blättern von Rohpapier erhalten wird und ein Flächengewicht von 30 gsm bis 150 gsm aufweist,
    die chemische Lösung ein Vernetzungsmittel, das den wasserlöslichen Binder zum Auslösen einer Vernetzungsreaktion veranlasst, und einen mehrwertigen Alkohol mit drei oder mehr Hydroxylgruppen als Lösungsmittel enthält, und
    die Imprägnierung des Rohpapierblatts mit dem mehrwertigen Alkohol mit drei oder mehr Hydroxylgruppen 1 Gewichts% bis 20 Gewichts% in Bezug auf ein Gewicht des Rohpapierblatts beträgt, dadurch gekennzeichnet, dass
    der wasserlösliche Binder eine Carboxylgruppe umfasst, ein Mischverhältnis von Weichholzzellstoff zu Hartholzzellstoff im Rohpapierblatt weniger als 1:1 beträgt, und das Rohpapierblatt in einem Zustand ist, in welchem ein Gehalt des wasserlöslichen Binders von innen zu einer vorderen Fläche und einer hinteren Fläche in einer Dickenrichtung des Rohpapierblatts zunimmt.
  2. Hydrolysierbares Blatt nach Anspruch 1, wobei die Imprägnierung des Rohpapierblatts mit der chemischen Lösung 150 Gewichts% bis 300 Gewichts% in Bezug auf ein Gewicht des Rohpapierblatts beträgt.
  3. Hydrolysierbares Blatt nach Anspruch 1 oder 2, wobei der mehrwertige Alkohol Glycerin oder Sorbitol ist.
  4. Hydrolysierbares Blatt nach einem der Ansprüche 1 bis 3, wobei Prägungen auf der gesamten Oberfläche des hydrolysierbaren Blatts ausgebildet sind.
  5. Hydrolysierbares Blatt nach Anspruch 4, wobei die Prägungen erste Prägungen und zweite Prägungen umfassen, die um die ersten Prägungen angeordnet sind, wobei sich eine Form eines vorstehenden Teils jeder der zweiten Prägungen von einer Form eines vorstehenden Teils einer jeden der ersten Prägungen unterscheidet.
  6. Hydrolysierbares Blatt nach Anspruch 5, wobei die ersten Prägungen in einem Rautengitter angeordnet sind.
  7. Hydrolysierbares Blatt nach Anspruch 5 oder 6, wobei jede der zweiten Prägungen zwischen zweien der ersten Prägungen angeordnet ist.
  8. Hydrolysierbares Blatt nach einem der Ansprüche 5 bis 7, wobei die ersten Prägungen die zweiten Prägungen berühren, um eine verbundene Prägung zu bilden.
  9. Hydrolysierbares Blatt nach einem der Ansprüche 1 bis 8, wobei ein Mischverhältnis von Weichholzzellstoff zu den Fasermaterialkomponenten größer als 50 Gewichts% ist.
  10. Hydrolysierbares Blatt nach einem der Ansprüche 1 bis 9, wobei der Binder Carboxymethylcellulose enthält.
  11. Verfahren zur Herstellung eines hydrolysierbaren Blatts nach einem der Ansprüche 1 bis 10, umfassend:
    - Anwenden eines Faltprozesses auf eine Mehrzahl von Blättern von Rohpapier (1A) mit einem Mischverhältnis von Weichholz zu Hartholz von weniger als 1:1, um ein gefaltetes Endlosblatt (1B) zu bilden;
    - Sprühen einer Lösung mit Binder, der eine Carboxylgruppe umfasst, aus jeweiligen Zweistoff-Sprühdüsen (3) auf beiden Außenflächen des Endlosblatts (1B) auf das gefaltete Endlosblatt;
    - Imprägnieren des Endlosblatts (1B) mit einer chemischen Lösung, das ein Vernetzungsmittel, das den wasserlöslichen Binder zum Auslösen einer Vernetzungsreaktion veranlasst, und einen mehrwertigen Alkohol mit drei oder mehr Hydroxylgruppen als Lösungsmittel aufweist.
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JP2015110839A JP6096245B2 (ja) 2015-05-29 2015-05-29 水解性シート
JP2015110837A JP6096244B2 (ja) 2015-05-29 2015-05-29 水解性シート
PCT/JP2016/060510 WO2016194460A1 (ja) 2015-05-29 2016-03-30 水解性シート

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JP7105750B2 (ja) * 2019-09-30 2022-07-25 大王製紙株式会社 水解性シート

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US20180146834A1 (en) 2018-05-31
WO2016194460A1 (ja) 2016-12-08
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CN107532389A (zh) 2018-01-02
KR20180013876A (ko) 2018-02-07
EP3305983A4 (de) 2018-04-25

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