WO2020110923A1 - Toilet paper - Google Patents

Toilet paper Download PDF

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Publication number
WO2020110923A1
WO2020110923A1 PCT/JP2019/045729 JP2019045729W WO2020110923A1 WO 2020110923 A1 WO2020110923 A1 WO 2020110923A1 JP 2019045729 W JP2019045729 W JP 2019045729W WO 2020110923 A1 WO2020110923 A1 WO 2020110923A1
Authority
WO
WIPO (PCT)
Prior art keywords
paper
toilet paper
toilet
ply
present
Prior art date
Application number
PCT/JP2019/045729
Other languages
French (fr)
Japanese (ja)
Inventor
秀太 保井
穣 岩崎
Original Assignee
大王製紙株式会社
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
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Priority to EP19889274.7A priority Critical patent/EP3865035A4/en
Priority to KR1020217012187A priority patent/KR102644625B1/en
Priority to US17/297,220 priority patent/US20210401242A1/en
Priority to CN201980069393.2A priority patent/CN112911977B/en
Priority to BR112021010204-3A priority patent/BR112021010204A2/en
Publication of WO2020110923A1 publication Critical patent/WO2020110923A1/en

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Classifications

    • 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
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/16—Paper towels; Toilet paper; Holders therefor
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • 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
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • 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
    • D21H17/07—Nitrogen-containing compounds
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/22—Agents rendering paper porous, absorbent or bulky
    • D21H21/24—Surfactants
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/32—Bleaching 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
    • 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

Definitions

  • the present invention relates to toilet paper.
  • toilet paper is also required to be suitable for use in shower toilets (see Patent Document 1 below).
  • multi-ply products such as 3-ply and 4-ply products are desirable as toilet paper suitable for shower toilets so that consumers can feel secure when using them.
  • toilet paper is generally manufactured from a fiber raw material obtained by mixing a pulp derived from a hardwood with a short fiber length and a pulp derived from a softwood with a long fiber length, and mainly a hardwood-derived pulp which is easy to improve its softness and surface property. It is common to include many.
  • pulp which is a fiber raw material
  • chlorine-based bleaching chemicals such as chlorine, chlorine dioxide and sodium hypochlorite
  • pulp that has not been bleached with chlorine-based bleach contains a large amount of lignin, and the fibers are hard, and toilet paper, which is the main fiber raw material, tends to have hardness and rough surface.
  • the main problem of the present invention is to have a feeling of thickness that can be relieved in a situation where the toilet is used in a shower toilet, sufficient softness, further excellent in water decomposability, and a sense of security for the human body during use. To provide.
  • the first means for solving the above problems is 3-4 ply toilet paper, 80 to 100% by mass of the fiber is softwood kraft pulp that has been digested with oxygen and not bleached with chlorine, Contains cationic fatty acid amide softener, The basis weight of one ply is 12.5-16.0 g/m 2 , The paper thickness of one ply is 120 to 150 ⁇ m, and the total paper thickness of the toilet paper is 400 to 600 ⁇ m, Water degradability is 10 seconds or less, It is a toilet paper characterized in that.
  • a toilet paper is Provided.
  • the toilet paper according to the present embodiment has 3 plies or 4 plies. That is, three or four sheets are stacked.
  • the overall paper thickness becomes thick while making each ply thin, making it especially easy to feel the "softness" and is safe to tear. It can have a feeling.
  • the toilet paper according to the present embodiment has a basis weight of 12.5 g/m 2 or more and 16.2 g/m 2 or less per ply.
  • the basis weight of one ply is within this range, it is possible to obtain sufficient resistance to tearing and good feel of the skin in the case of the above-mentioned three or four plies, and it is easy to exhibit water decomposability.
  • the toilet paper according to the present invention is a softwood kraft pulp in which 80 to 100% by mass, especially 100% by mass of the constituent fibers is oxygen-digested and is not bleached with chlorine. More specifically, this softwood kraft pulp is also referred to as NOKP, and is produced by continuously performing oxygen digestion in a continuous digester, and is not subjected to bleaching treatment with a chlorine bleaching chemical after that.
  • KP (kraft pulp) used for toilet paper includes bleached ones and unbleached ones, and unbleached ones contain a large amount of lignin.
  • the softwood kraft pulp according to the present invention has not been bleached with a chlorine-based bleaching agent, but has undergone oxygen digestion (oxygen delignification), and thus about half the amount of lignin has been removed.
  • the chlorine-based bleaching chemical is meant to include not only chlorine but also chlorine dioxide and sodium hypochlorite. Therefore, the ECF pulp is not the above-mentioned softwood kraft pulp according to the present invention.
  • the toilet paper according to the present invention contains 80 to 100% by mass of softwood kraft pulp that has not been bleached with a chlorine-based bleaching agent but has been subjected to delignification treatment by oxygen digestion.
  • softwood kraft pulp is manufactured mainly as a fiber raw material, particularly as a whole fiber raw material, it is safe for the human body during use and is environmentally friendly.
  • the toilet paper containing 80 to 100% by mass of such softwood kraft pulp has a light brown color and is liable to have the impression that it is a natural product which has not been chemically treated and has a soft impression. Therefore, the purchaser feels a great sense of security. ..
  • the softness is more likely to be expressed than when the pulp without the delignification treatment is used as the raw material. It is easy to make a firm strength. Further, since the content of hardwood kraft pulp, which tends to have low water decomposability, is at least less than 20% by mass, and particularly 0% by mass, water decomposability is likely to be good.
  • lignin is not hydrophilic, oxygen-digested, non-chlorine-bleached softwood kraft pulp has low fiber swelling and weak interfiber bonding. Therefore, the fibers become sparse and the water decomposability becomes good. Further, since the softwood kraft pulp is derived from a softwood and has a longer fiber length than the pulp derived from a hardwood, the lignin has an effect of preventing the fibers from becoming dense, and thus has excellent cushioning properties.
  • the toilet paper according to the present invention contains 80 to 100% by mass of the softwood kraft pulp, and the basis weight of one ply is 12.5-16.0 g/m 2 .
  • the more preferable basis weight of one ply is 12.7 to 15.8 g/m 2 .
  • the basis weight according to the present invention is based on the basis weight measuring method of JIS P 8124 (1998). While containing 80 to 100% by mass of the above-mentioned softwood kraft pulp, the basis weight of one ply is set to a slightly lower value of 12.5 to 15.5 g/m 2 and further a multi-ply of 3 ply or 4 ply is used to obtain a feeling of thickness.
  • the toilet paper which is easy to develop softness, has a sense of security for the human body during use, and is environmentally friendly.
  • other pulp fibers constituting the toilet paper according to the present invention are not necessarily limited. It may be virgin pulp or waste paper pulp. Waste paper pulp tends to be finer than pulp fiber before recycling in the process of recycling pulp from waste paper, and due to the nature of such fibers, the fibers become dense without thickening the paper thickness. Easy to increase paper strength. On the other hand, if it is blended excessively, the texture such as flexibility is deteriorated. Therefore, in view of the characteristics of waste paper pulp, its blending ratio may be set in the range of 0 to less than 20% by mass.
  • waste paper pulp is not necessarily limited, but milk carton waste paper and waste paper pulp made from high-quality waste paper are particularly desirable. Since a large amount of hardwood kraft pulp (LBKP) derived from the raw materials is mixed in these, it is easy to develop paper strength.
  • LKP hardwood kraft pulp
  • the toilet paper according to the present invention is substantially a moisturizer-uncoated moisturizer-uncoated one.
  • the humectant as an external additive according to the present invention is a polyol, and at least glycerin, diglycerin, propylene glycol, 1,3-butylene glycol and polyethylene glycol are included.
  • Toilet paper according to the present invention is excellent in a sense of security for the human body, and when the moisturizer is applied, the moisturizer-specific sticky feeling and moisturizing feeling can be felt, so that a sense of security for the human body is provided. descend.
  • a softening agent or a softening agent that determines the softness and paper strength of the base paper itself that is internally added during papermaking is added.
  • the softener contained in the toilet paper according to the present invention is a cationic fatty acid amide softener.
  • the toilet paper according to the present invention may contain the cationic fatty acid amide softener.
  • the cationic fatty acid amide-based softening agent does not reduce the effect due to the inclusion of lignin, and also acts to coat the fiber surface. Therefore, even if the pulp containing lignin is highly blended, the surface is smooth, the feeling of stiffness is significantly reduced, and the feeling of fluffiness is increased.
  • a specific example of the cationic fatty acid amide-based softening agent is preferably a reaction product of epihalohydrin with an amide-based compound obtained by the reaction of polyalkylene polyamines and monocarboxylic acids.
  • this cationic fatty acid amide type softener With this cationic fatty acid amide type softener, the effect is exhibited.
  • an emulsifier having an alkyl group and/or an alkenyl group having 4 to 20 carbon atoms is used.
  • And is preferably mixed with water and added.
  • the content of the cationic fatty acid amide-based softening agent is not necessarily limited, but when the fixing rate is 50 to 60%, the addition amount at the time of production may be 0.5 to 4.0 kg/pulp t.
  • the toilet paper according to the present invention preferably has a soft moisturizer internally added.
  • the content is preferably 0.2 to 2.0 kg/pulp t.
  • a soft moisturizer improves flexibility.
  • a particularly preferable softening agent is a compound obtained by adding an alkylene oxide having 2 to 4 carbon atoms to active hydrogen of polyalkyleneimine having a weight average molecular weight of 500 to 10,000, and a higher fatty acid having 12 to 24 carbon atoms and And/or a reaction product obtained by reacting an ester compound of a higher fatty acid having 12 to 24 carbon atoms. By including this soft moisturizer, the softness is further improved.
  • the toilet paper according to the present invention may be embossed.
  • the emboss pattern is not necessarily limited.
  • the embossing can be an appropriate embossing pattern such as micro embossing, dot type embossing, design embossing and the like.
  • the embossing pattern according to the present invention is an embossing applied in a ply laminated state called a single embossing.
  • a preferred embossing pattern according to the present invention has a concave area of 1.0 to 2.5 mm 2 , a density of 5.0 to 50 pieces/cm 2 , and an embossing depth of 0.05 to 0.5 mm. is there.
  • the softness as a toilet paper is improved, and the softness in a roll state like a toilet roll is increased, and it becomes easier for consumers to feel softness when holding it in their hands.
  • the recesses 32 each having a substantially square shape (FIG.
  • the valley line portions 33 are arranged and extend between the recesses 31 (32) and the recesses 31 (32) so as to extend from the four directions of the recesses.
  • the valley line portion 33 is gradually and gently arranged in a bow shape in cross section so that the squares of the recesses 31 (32) are deepest and the middle of the recesses is shallowest. This embossed pattern is excellent in softness and stool wipeability.
  • the depth of embossing is measured with a one-shot 3D measurement macroscope VR-3200 manufactured by Keyence Corporation or its equivalent machine and image analysis software "VR-H1A" or its equivalent software.
  • the measurement is performed under the conditions of a magnification of 12 and a visual field area of 24 mm ⁇ 18 mm. However, the magnification and the field of view can be appropriately changed depending on the size of the emboss (recess).
  • the specific measurement procedure will be described with reference to FIG. 2. Using the software described above, the longest part of the peripheral edge of one emboss (recess) 40 in the image part (X part in the drawing) shown in a plan view is determined. Obtain the emboss depth (measurement cross section curve) profile at the crossing line segment Q1.
  • the depth of the embossing is measured also for the shortest part in the direction perpendicular to the longest part, and the larger value is adopted as the depth of the embossing (recess).
  • the above measurement is performed for any 10 embosses on the surface of the toilet paper, and the average value thereof is used as the final emboss depth.
  • each recess of the emboss pattern is also visually checked from the one-shot 3D measurement macroscope VR-3200 or its equivalent machine and the 3D image obtained by measuring with the image analysis software "VR-H1A” or its equivalent software. Check the contour of the embossed recess and measure the area inside the contour. The embossing is performed for any 10 embosses on the surface of the toilet paper, and the average value is used as the final embossed recess area.
  • the toilet paper according to the present invention has a thickness of one ply of 120 to 150 ⁇ m, and the total thickness of the toilet paper is 400 to 600 ⁇ m. By setting the paper thickness within this range, the softness is improved.
  • the test piece should be conditioned under JIS P 8111 (1998) sufficiently (usually for about 8 hours), and then dial thickness gauge (thickness measuring instrument) under the same conditions. It shall be measured in the state of 1 ply using "PEACOCK G type" (manufactured by Ozaki Seisakusho). Specifically, check that there is no dust, dust, etc.
  • the plunger is embossed, make sure that one of the concave parts (convex parts) is within the range of the measuring table. When there are recesses having different depths, the recess having the deepest depth is positioned. During this measurement, the plunger is only placed and cannot be pressed.
  • the terminal of the plunger is made of metal so that a circular flat surface having a diameter of 10 mm hits the plane of the paper perpendicularly, and the load when measuring the paper thickness is about 70 gf.
  • the paper thickness is an average value obtained by performing the measurement 10 times.
  • crushing of the emboss concave portion
  • the paper thickness according to the present invention is a value measured including such crushing, and such crushing is ignored. Good.
  • the paper thickness difference caused by the collapse of the concave portion can be ignored.
  • the toilet paper according to the present invention has a water degradability of 10 seconds or less, which is extremely fast. This is because 80% by mass or more, especially 100% by mass of the constituent fibers are softwood kraft pulp containing lignin, and the fibers are easily disentangled. If the water decomposability is within 10 seconds, the risk of clogging the pipes when flushing the water in a flush toilet or the like is further reduced. The measurement of this water decomposability (easiness of loosening) is according to JIS P4501 (1993).
  • a 300 mL beaker containing 300 mL of water (water temperature 20 ⁇ 5° C.) is placed on a magnetic stirrer, and the rotation speed of the rotor is adjusted to be 600 ⁇ 10 rotations/minute.
  • a test piece of which one side is 100 ⁇ 2 mm square is put therein and the stopwatch is pushed.
  • the rotation speed of the rotor is once lowered to about 500 rotations due to the resistance of the test piece, and the rotation speed is increased as the test piece is loosened.
  • the stopwatch is stopped when the number of revolutions is recovered to 540, and the time is measured in units of 1 second.
  • the result of easiness of loosening is expressed as an average of 5 times of tests.
  • the rotor has a disk shape with a diameter of 35 mm and a thickness of 12 mm.
  • the Canadian standard freeness of the papermaking material is preferably 650 cc or more.
  • the Canadian freeness of the papermaking raw material is 650 cc or more, the pulp fibers are hardly beaten or are fibers which are unbeaten raw materials, so that the water-solubility is likely to be excellent.
  • the toilet paper according to the present invention preferably has a dry tensile strength in the longitudinal direction of 400 cN/25 mm or more and 900 cN/25 mm or less.
  • the dry tensile strength in the transverse direction is preferably 200 cN/25 mm or more and 450 cN/25 mm or less. Within this range, it can be used sufficiently.
  • the longitudinal direction of paper is also called the MD direction, and is the flow direction during papermaking.
  • the lateral direction of the paper is also called the CD direction and is a direction orthogonal to the flow direction (MD direction) at the time of papermaking.
  • the dry tensile strength according to the present invention is a value measured based on JIS P8113 (2006), and is measured as follows. A test piece cut into a width of 25 mm ( ⁇ 0.5 mm) and a length of 150 mm is used in both the vertical and horizontal directions. The test piece is measured in multiple plies. As the tester, a load cell tensile tester TG-200N manufactured by Minebea Co., Ltd. and an equivalent machine corresponding thereto are used.
  • the gripping interval is set to 100 mm and the pulling speed is set to 100 mm/min.
  • the measurement is performed by tightening both ends of the test piece to the grips of the tester, applying a tensile load to the paper piece in the vertical direction, and reading the indicated value (digital value) when the paper breaks.
  • Five sets of samples are prepared in each of the vertical direction and the horizontal direction, and each set is measured 5 times, and the average of the measured values is taken as the dry tensile strength in each direction.
  • the dry tensile strength was measured by stacking a plurality of sheets according to the number of plies of the product.
  • the toilet paper according to the present invention preferably has a wet tensile strength in the longitudinal direction of 50 cN/25 mm or more and 100 cN/25 mm or less.
  • the wet tensile strength in the transverse direction is preferably 25 cN/25 mm or more and 50 cN/25 mm or less.
  • the wet tensile strength is a value measured based on JIS P8135 (1998), and is measured as follows. A test piece cut into a width of 25 mm ( ⁇ 0.5 mm) and a length of 150 mm is used in both the vertical and horizontal directions. If the tissue paper has multiple plies, measure it as it is.
  • a load cell tensile tester TG-200N manufactured by Minebea Co., Ltd. and an equivalent machine corresponding thereto are used as the tester.
  • the gripping interval is set to 100 mm and the pulling speed is set to 50 mm/min.
  • As the test piece a test piece that has been cured by a dryer at 105° C. for 10 minutes is used. After tightening both ends of the test piece to the grips of the tester, use a flat brush soaked in water to apply water horizontally to the center of the test piece with a width of about 10 mm, and then immediately move it up and down with respect to the paper piece. A tensile load is applied to and the measurement is performed by reading the indicated value (digital value) when the paper breaks.
  • wet tensile strength Five sets of samples are prepared for each of the vertical direction and the horizontal direction, and each set is measured 5 times, and the average of the measured values is taken as the wet tensile strength in each direction. Also in terms of wet tensile strength, the wet tensile strength was measured by stacking a plurality of sheets according to the number of plies of the product.
  • the toilet paper according to the present invention has an MMD value, which is an index of surface properties, of 7.5 or more and 9.5 or less. If the MMD is less than 7.5, the surface is too slippery and the wiping property is deteriorated. If the MMD is more than 9.5, the skin feels poor and it may not be suitable for use as toilet paper.
  • the measurement of MMD is substantially the same as the direction in which the tension is applied while the contact surface of the friction element is brought into contact with the surface of the measurement sample to which a tension of 20 g/cm is applied in the predetermined direction with a contact pressure of 25 g.
  • the softness of the toilet paper of this embodiment is preferably 1.8 cN/100 mm or more and 3.5 cN/100 mm or less. Softness is one of the indices of softness that the lower the value, the softer it is. For tissue paper or toilet paper, 1.0 cN/100 mm or less is considered to be sufficiently soft. The softness is a value measured based on the handle odometer method according to JIS L 1096 E method (1990). However, the test piece has a size of 100 mm ⁇ 100 mm, and the clearance is 5 mm. Each ply is measured 5 times in the longitudinal direction and 5 times in the lateral direction, and the average value of all 10 times is taken. The softness is unitless, but cN/ It may be expressed in units of 100 mm.
  • the dry tensile strength and the wet tensile strength can be adjusted without using a paper strength agent such as a dry paper strength enhancer or a wet paper strength enhancer.
  • a paper strength agent such as a dry paper strength enhancer or a wet paper strength enhancer.
  • the paper strength agent is not included from the viewpoint of the user's sense of security.
  • a paper-strengthening agent even if it does not contain a paper-strengthening agent, a high content of 80% by mass or more, particularly 100% by mass, of a softwood kraft pulp having a long fiber length ensures a entanglement between fibers, and it is used. Can have sufficient strength.
  • since it contains lignin it is also excellent in water decomposability. That is, it is possible to secure sufficient strength without using a paper-strengthening agent and also to improve water degradability.
  • the toilet paper of the present embodiment it is desirable not to use a dry paper strength enhancer or a wet paper strength enhancer as described above, but it may be used if necessary as long as it does not impair water decomposability.
  • the dry paper strength enhancer used herein include starch, polyacrylamide, CMC (carboxymethyl cellulose) or a salt thereof such as sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, and zinc carboxymethyl cellulose.
  • the wet paper strength enhancer is polyamide polyamine epichlorohydrin resin, urea resin, acid colloid/melamine resin, thermally crosslinkable coating PAM, TS-20 manufactured by Seikou PMC Co., glyoxylated polyacrylamide, cationic glyoxylated polyacrylamide.
  • Polymeric aldehyde-functional compounds such as, copolymers of glyoxal divalent aldehyde-modified acrylamide monomers with other copolymerizable unsaturated monomers or dialdehyde starch.
  • the toilet paper of the present embodiment is suitable in the form of a toilet roll in which a strip-shaped toilet paper 10 is wound around a paper tube (also referred to as a tube core) 20 in a roll shape as shown in FIG.
  • the toilet roll according to the present invention has a winding diameter L2 (diameter) of 110 to 115 mm.
  • the roll diameter of the toilet roll is stipulated in JIS P4501 to be 120 mm or less, and the holder for setting a general toilet roll is created based on this 120 mm.
  • the toilet roll of the present invention has a winding diameter of 110 to 115 mm, and has a size that can be sufficiently set in a general holder.
  • the winding diameter is a value measured by using a diameter rule manufactured by Muratec KDS Co., Ltd. or an equivalent machine.
  • the measured value is an average value measured at three locations by changing the location in the width direction.
  • the average value of the same production lot product is the average value of 5 rolls.
  • such a toilet roll preferably has a winding length of 20 to 40 m, and at that time, a winding density of 0.20 to 0.30 m/cm 2 .
  • the winding density here is a value calculated by winding length (m)/actual cross-sectional area.
  • the actual cross-sectional area is ⁇ (roll diameter/2) ⁇ (roll diameter/2) ⁇ (paper tube outer diameter/2) ⁇ (paper tube outer diameter/2) ⁇ (unit: cm 2 ). It is a calculated value. In other words, it is the area obtained by subtracting the area of the paper tube opening end side from the area of the end surface.
  • the outer diameter of the paper tube (paper tube diameter) L3 is preferably 35 to 45 mm ⁇ , similar to a general size.
  • the roll winding hardness is 1.8 to 2.2 mm.
  • mm roll hardness (mm) (T0-TM)
  • "Handy compression tester KES-G5" manufactured by Kato Tech Co., Ltd. is used to measure the roll hardness (mm) (T0-TM).
  • Toilet roll TR is placed sideways on a horizontal pedestal made of steel plate so that its central axis is horizontal, and a steel plate terminal having a circular flat surface with a compression area of 2 cm 2 is brought into contact with the center of the upper surface of the outer periphery of the roll body. With this abutting state as the zero point, the steel plate terminal is moved vertically downward from the zero point at a speed of 10 mm/min to compress the toilet roll.
  • the amount I press when the compressive load 0.5gf / cm 2 T0 (mm) the amount try pressing when the compressive load 50 gf / cm @ 2 as a TM (mm), the roll (T0-TM) (mm) Roll hardness (mm).
  • the toilet roll of the present invention preferably has a compression work amount (WC) of 3.6 to 4.6 gf ⁇ cm/cm 2 .
  • Compression work amount (WC) is an amount of work when pushed to 50 gf / cm 2 from contact with steel pins to roll 0.5 gf / cm 2, as the amount of compression work (WC) is large, the initial pushing Since the repulsive force is weak, it feels soft at the moment of gripping the roll, and when the compression load is then pushed deeply to 50 gf/cm 2 when gripping the roll, the roll can be evaluated as soft and fluffy.
  • the toilet paper according to the present invention is a long-fiber softwood kraft pulp containing lignin in which 80 to 100% by mass of the fiber has been digested with oxygen and which has not been bleached with chlorine. Since the bonds between the fibers are weak, the above roll form is used. In that case, the cushioning property is excellent and the softness is easily felt as described above when held in the hand.
  • composition of the toilet roll and the physical properties and composition of the toilet paper according to each example are as shown in Table 1 below.
  • the sensory evaluation was performed by having 18 test subjects actually use the rolled toilet paper according to each example, and the "softness,” “softness,” “thickness,” “tear, strength during use” With respect to each item, relative evaluation was performed based on Comparative Example 3 (conventional product). The evaluation was made by setting Comparative Example 3 to 4 points (median value), scoring up to 7 points in the case of good and 1 point in the case of bad, and scoring each point, and calculating the average value to judge. It was decided to.
  • the examples according to the present invention gave excellent results in sensory evaluation. Moreover, regarding the water decomposability, excellent results were obtained. Further, even when compared with Comparative Example 1 in which the winding densities are almost the same, superior measurement results were obtained in the winding hardness and the compression work (WC) when formed into a roll. Further, as for the strength, a measurement result was obtained in which a sufficient strength without breakage during use was secured.
  • the toilet paper according to the present invention has a thickness feeling that can be relieved in a situation where it is used in a shower toilet, has sufficient softness, and further has excellent water decomposability, and has a sense of security for the human body during use. It is a thing.

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Abstract

[Problem] To provide toilet paper that is exceptional in terms of thick sensation and disintegrability in water, the toilet paper having sufficient softness, imparting a sense of security to a person during use, and being designed in consideration of the environment. [Solution] The above problem is solved by three- to four-ply toilet paper, wherein the basis weight of each ply is 12.5-15.5 g/m2, 80-100 mass% of fibers in the toilet paper are made of softwood kraft pulp that is digested by oxygen and is not bleached by chlorine, the toilet paper includes a cationic aliphatic-acid-amide-type softener, the paper thickness of each ply is 120-150 μm, the overall paper weight of the toilet paper is 400-600 μm, and the disintegrability in water is 10 seconds or less.

Description

トイレットペーパーToilet Paper
　本発明は、トイレットペーパーに関する。 The present invention relates to toilet paper.
　洗浄機能付きトイレともいわれるシャワートイレの普及にともない、トイレットペーパーにおいては、シャワートイレにおける使用に適することも求められている（下記、特許文献１）。 With the spread of shower toilets, which are also called toilets with a cleaning function, toilet paper is also required to be suitable for use in shower toilets (see Patent Document 1 below).
　シャワートイレに適するトイレットペーパーは、消費者が使用した際の安心感が得られる３プライや４プライといった多プライ品が望ましいとされる。 It is said that multi-ply products such as 3-ply and 4-ply products are desirable as toilet paper suitable for shower toilets so that consumers can feel secure when using them.
　ところで、トイレットペーパーは、一般に繊維長の短い広葉樹由来のパルプと、繊維長の長い針葉樹由来のパルプを混合した繊維原料から製造され、主に、柔らかさや表面性を向上させやすい広葉樹由来のパルプを多く含むものが一般的である。 By the way, toilet paper is generally manufactured from a fiber raw material obtained by mixing a pulp derived from a hardwood with a short fiber length and a pulp derived from a softwood with a long fiber length, and mainly a hardwood-derived pulp which is easy to improve its softness and surface property. It is common to include many.
　また、白色度を高めるため繊維原料であるパルプを、塩素や二酸化塩素、次亜塩素酸ソーダなどの塩素系漂白薬品を用いて漂白することが行われているが、人体への安心感や環境への配慮を重視する消費者において、塩素系漂白薬品を使わないパルプを原料とする環境等に配慮した製品の要望もある。 In addition, in order to increase whiteness, pulp, which is a fiber raw material, is bleached with chlorine-based bleaching chemicals such as chlorine, chlorine dioxide and sodium hypochlorite. There is also a demand for environmentally friendly products made from pulp that does not use chlorine-based bleaching chemicals, for consumers who place great importance on consideration.
特開２０１１‐１５３３８７号公報JP, 2011-153387, A
　しかし、塩素系漂白薬品を用いて漂白していないパルプはリグニンが多く残り、また、繊維が固く、これを主たる繊維原料としたトイレットペーパーは、固さや表面のざらつきが感じられやすくなりやすい。 However, pulp that has not been bleached with chlorine-based bleach contains a large amount of lignin, and the fibers are hard, and toilet paper, which is the main fiber raw material, tends to have hardness and rough surface.
　一方、柔らかさを感じやすくするために広葉樹パルプの配合量をより多くして紙の強度を下げることが知られるが、広葉樹パルプの配合量を多くすると水解性が悪化しやすい。特に、多プライ品は水解性が悪化しやすいため、広葉樹パルプの配合量を多くするとシャワートイレでの使用に適さなくなってくるおそれがある。 On the other hand, it is known to increase the amount of hardwood pulp to lower the strength of the paper in order to make it easier to feel the softness. However, if the amount of hardwood pulp is increased, the water degradability tends to deteriorate. In particular, since the multi-ply product is liable to deteriorate in water decomposability, there is a possibility that it will not be suitable for use in a shower toilet if the blending amount of hardwood pulp is increased.
　そこで、本発明の主たる課題は、シャワートイレで使用するような場面において安心できる厚み感があり、柔らかさが十分で、さらに水解性に優れ、使用時における人体への安心感がある、トイレットパーパーを提供することにある。 Therefore, the main problem of the present invention is to have a feeling of thickness that can be relieved in a situation where the toilet is used in a shower toilet, sufficient softness, further excellent in water decomposability, and a sense of security for the human body during use. To provide.
　上記課題を解決した第一の手段は、
　３～４プライのトイレットペーパーであって、
　繊維の８０～１００質量％が酸素蒸解され塩素漂白されていない針葉樹クラフトパルプであり、
　カチオン性脂肪酸アミド系柔軟剤を含み、
　１プライの坪量が１２．５～１６．０ｇ／ｍ2であり、
　１プライの紙厚が１２０～１５０μｍであり、トイレットペーパー全体としての紙厚が４００～６００μｍであり、
　水解性が１０秒以下である、
　ことを特徴とするトイレットペーパーである。 The first means for solving the above problems is
3-4 ply toilet paper,
80 to 100% by mass of the fiber is softwood kraft pulp that has been digested with oxygen and not bleached with chlorine,
Contains cationic fatty acid amide softener,
The basis weight of one ply is 12.5-16.0 g/m 2 ,
The paper thickness of one ply is 120 to 150 μm, and the total paper thickness of the toilet paper is 400 to 600 μm,
Water degradability is 10 seconds or less,
It is a toilet paper characterized in that.
　以上の本発明によれば、シャワートイレで使用するような場面において安心できる厚み感があり、柔らかさが十分で、さらに水解性に優れ、使用時における人体への安心感がある、トイレットパーパーが提供される。 According to the present invention described above, there is a thickness feeling that can be relieved in a situation where it is used in a shower toilet, sufficient softness, further excellent in water decomposability, and a feeling of safety to the human body during use, a toilet paper is Provided.
本発明の実施形態に係るエンボスの平面図である。It is a top view of the embossing concerning the embodiment of the present invention. 本発明に係るエンボス深さの測定手順を説明するための概略図である。It is a schematic diagram for explaining a measuring procedure of embossing depth concerning the present invention. 本発明の実施形態に係るトイレットロールの斜視図である。It is a perspective view of the toilet roll concerning the embodiment of the present invention.
　本実施形態に係るトイレットペーパーは、３プライ又は４プライである。つまり、３枚又は４枚が重ねられているものである。３プライ又は４プライのような２プライを超える多プライとすることで、各プライを薄くしつつも全体の紙厚が厚くなり、特に「柔らかさ」が感じられやすいものとしつつ、破れにくい安心感のあるものとすることができる。 The toilet paper according to the present embodiment has 3 plies or 4 plies. That is, three or four sheets are stacked. By using multiple plies that exceed 2 plies such as 3 plies or 4 plies, the overall paper thickness becomes thick while making each ply thin, making it especially easy to feel the "softness" and is safe to tear. It can have a feeling.
　なお、２プライであると厚み感が発現し難く、シャワートイレ使用後の多量の水分を吸収しつつ拭き取る際の安心感に欠けるものとなりやすい。また、５プライ以上となると各プライを薄くしても、肌の清拭の際に柔らかさを感じにくくなる。また、後述する本発明に係る１プライ当たりの坪量及び紙厚において５プライ以上として、特にエンボスを付与すると剛性感が強く感じられるようになり、柔らかさが感じられにくいものとなる。 Note that if it is 2 plies, it does not easily give a thick feeling, and it tends to lack a sense of security when wiping off while absorbing a large amount of water after using a shower toilet. If the number of plies is 5 or more, even if each ply is thinned, it becomes difficult to feel the softness when the skin is wiped. Further, when the basis weight and paper thickness per ply according to the present invention to be described later are 5 plies or more, and particularly embossing is provided, a strong feeling of rigidity is felt and softness is hardly felt.
　他方で、本実施形態に係るトイレットペーパーでは、１プライあたり坪量が１２．５ｇ/ｍ2以上１６．２ｇ／ｍ2以下である。１プライの坪量がこの範囲内であれば上記３又は４プライの際に、十分な破れにくさと肌ざわりの良さとすることができ、また、水解性を発現させやすくなる。 On the other hand, the toilet paper according to the present embodiment has a basis weight of 12.5 g/m 2 or more and 16.2 g/m 2 or less per ply. When the basis weight of one ply is within this range, it is possible to obtain sufficient resistance to tearing and good feel of the skin in the case of the above-mentioned three or four plies, and it is easy to exhibit water decomposability.
　他方、本発明に係るトイレットペーパーは、構成する繊維の８０～１００質量％、特に１００質量％が酸素蒸解され塩素漂白されていない針葉樹クラフトパルプである。より詳細には、この針葉樹クラフトパルプは、ＮＯＫＰとも称され、連続蒸解釜にて連続して酸素蒸解をされて製造され、特にその後に塩素系漂白薬品による漂白処理がされていないものである。ここで、トイレットペーパーに用いられるＫＰ（クラフトパルプ）には、漂白されているものと漂白されていないものがあり、未漂白のものはリグニンが多く含まれる。本発明に係る針葉樹クラフトパルプは、塩素系漂白薬品による未漂白であるが酸素蒸解（酸素脱リグニン）が行われているため、リグニンの約半量が除去されている。なお、塩素系漂白薬品は、塩素のみならず、二酸化塩素、次亜塩素酸ソーダも含む意味である。よって、ＥＣＦパルプも本発明に係る上記針葉樹クラフトパルプではない。 On the other hand, the toilet paper according to the present invention is a softwood kraft pulp in which 80 to 100% by mass, especially 100% by mass of the constituent fibers is oxygen-digested and is not bleached with chlorine. More specifically, this softwood kraft pulp is also referred to as NOKP, and is produced by continuously performing oxygen digestion in a continuous digester, and is not subjected to bleaching treatment with a chlorine bleaching chemical after that. Here, KP (kraft pulp) used for toilet paper includes bleached ones and unbleached ones, and unbleached ones contain a large amount of lignin. The softwood kraft pulp according to the present invention has not been bleached with a chlorine-based bleaching agent, but has undergone oxygen digestion (oxygen delignification), and thus about half the amount of lignin has been removed. The chlorine-based bleaching chemical is meant to include not only chlorine but also chlorine dioxide and sodium hypochlorite. Therefore, the ECF pulp is not the above-mentioned softwood kraft pulp according to the present invention.
　本発明に係るトイレットペーパーでは、塩素系漂白薬品による未漂白であるものの酸素蒸解による脱リグニン処理を行った針葉樹クラフトパルプを８０～１００質量％含む。つまり係る針葉樹クラフトパルプを主たる繊維原料、特には全繊維原料として、製造されているため、使用時における人体への安心感があり、かつ、環境に配慮されたものである。なお、特に係る針葉樹クラフトパルプを８０～１００質量％含むトイレットペーパーは、薄茶色となり見た目においても化学的な処理がされていない天然物のような印象を受けやすく、また柔らかな印象のものとなるため、購入者は非常に安心感を感ずるものとなる。　 The toilet paper according to the present invention contains 80 to 100% by mass of softwood kraft pulp that has not been bleached with a chlorine-based bleaching agent but has been subjected to delignification treatment by oxygen digestion. In other words, since such softwood kraft pulp is manufactured mainly as a fiber raw material, particularly as a whole fiber raw material, it is safe for the human body during use and is environmentally friendly. In particular, the toilet paper containing 80 to 100% by mass of such softwood kraft pulp has a light brown color and is liable to have the impression that it is a natural product which has not been chemically treated and has a soft impression. Therefore, the purchaser feels a great sense of security. ‥
　一方で、酸素蒸解による脱リグニン処理によってリグニンが酸素蒸解前よりも半分程度にまで低減されているため、脱リグニン処理が全くされていないパルプを原料とするよりも柔らかさが発現させやすいうえ、しっかりとした強度にもしやすい。また、水解性が低くなりやすい広葉樹クラフトパルプが少なくとも２０質量％未満、特には０質量％となるため、水解性も良好としやすい。 On the other hand, since the lignin is reduced to about half of that before the oxygen digestion by the delignification treatment by the oxygen digestion, the softness is more likely to be expressed than when the pulp without the delignification treatment is used as the raw material. It is easy to make a firm strength. Further, since the content of hardwood kraft pulp, which tends to have low water decomposability, is at least less than 20% by mass, and particularly 0% by mass, water decomposability is likely to be good.
　また、リグニンは親水性ではないため、これを含む酸素蒸解され塩素漂白されていない針葉樹クラフトパルプは、繊維の膨潤性が低く、繊維間結合が弱くなる。このため、繊維間が疎になり、水解性が良好となる。さらに、針葉樹クラフトパルプは、針葉樹由来のため広葉樹由来のパルプに比して繊維長が長いため、リグニンによる繊維が密にならない作用と相まって、クッション性に優れるものとなる。 Also, since lignin is not hydrophilic, oxygen-digested, non-chlorine-bleached softwood kraft pulp has low fiber swelling and weak interfiber bonding. Therefore, the fibers become sparse and the water decomposability becomes good. Further, since the softwood kraft pulp is derived from a softwood and has a longer fiber length than the pulp derived from a hardwood, the lignin has an effect of preventing the fibers from becoming dense, and thus has excellent cushioning properties.
　そして、本発明に係るトイレットペーパーは、係る針葉樹クラフトパルプを８０～１００質量％含むうえ、１プライの坪量が１２．５～１６．０ｇ／ｍ2である。より好ましい１プライの坪量は、１２．７～１５．８ｇ／ｍ2である。なお、本発明に係る坪量とは、ＪＩＳ Ｐ ８１２４（１９９８）の坪量測定方法によるものである。上記の針葉樹クラフトパルプを８０～１００質量％含みつつ、１プライの坪量をやや低い１２．５～１５．５ｇ／ｍ2とし、さらに３プライ又は４プライの多プライとすることで、厚み感及び水解性に優れ、柔らかさも発現しやすく、使用時における人体への安心感があり、かつ、環境に配慮されたトイレットパーパーとなる。ここで、本発明に係るトイレットペーパーを構成する他のパルプ繊維は、必ずしも限定されない。バージンパルプでも古紙パルプでもよい。古紙パルプは、古紙からパルプを再生する工程において、再生前のパルプ繊維に比して繊維が細かくなる傾向にあり、このような繊維の性質上、紙厚を厚くせずに、繊維が密となり紙力が高まりやすい。その一方で、過度に配合すると柔軟性などの風合いが低下する。よって古紙パルプの特徴に鑑みて、その配合比率を０～２０質量％未満の範囲で定めればよい。なお、古紙パルプの種類は必ずしも限定されるものではないが、特に、ミルクカートン古紙、上質古紙を原料とする古紙パルプが望ましい。これらは原料由来の広葉樹クラフトパルプ（ＬＢＫＰ）が多く配合されているため、紙力を発現させやすい。 The toilet paper according to the present invention contains 80 to 100% by mass of the softwood kraft pulp, and the basis weight of one ply is 12.5-16.0 g/m 2 . The more preferable basis weight of one ply is 12.7 to 15.8 g/m 2 . The basis weight according to the present invention is based on the basis weight measuring method of JIS P 8124 (1998). While containing 80 to 100% by mass of the above-mentioned softwood kraft pulp, the basis weight of one ply is set to a slightly lower value of 12.5 to 15.5 g/m 2 and further a multi-ply of 3 ply or 4 ply is used to obtain a feeling of thickness. In addition, it is a water-degradable toilet paper which is easy to develop softness, has a sense of security for the human body during use, and is environmentally friendly. Here, other pulp fibers constituting the toilet paper according to the present invention are not necessarily limited. It may be virgin pulp or waste paper pulp. Waste paper pulp tends to be finer than pulp fiber before recycling in the process of recycling pulp from waste paper, and due to the nature of such fibers, the fibers become dense without thickening the paper thickness. Easy to increase paper strength. On the other hand, if it is blended excessively, the texture such as flexibility is deteriorated. Therefore, in view of the characteristics of waste paper pulp, its blending ratio may be set in the range of 0 to less than 20% by mass. The type of waste paper pulp is not necessarily limited, but milk carton waste paper and waste paper pulp made from high-quality waste paper are particularly desirable. Since a large amount of hardwood kraft pulp (LBKP) derived from the raw materials is mixed in these, it is easy to develop paper strength.
　他方、本発明に係るトイレットペーパーは、実質的に保湿剤が塗布されていない保湿剤非塗布のものであるが望ましい。本発明に係る外添剤としての保湿剤は、ポリオール類であり、少なくともグリセリン、ジグリセリン、プロピレングリコール、１，３－ブチレングリコール、ポリエチレングリコールは含まれる。但し、保湿性のトイレットペーパーというに値しない程度にしか影響を与えない程度であれば、上記成分が含有されていることは否定されない。本発明に係るトイレットペーパーは、人体に対する安心感に優れるものであり、保湿剤が塗布されていると保湿剤特有のべたつき感やしっとり感が感じられものとなるため、上記の人体にたいする安心感が低下する。 On the other hand, it is preferable that the toilet paper according to the present invention is substantially a moisturizer-uncoated moisturizer-uncoated one. The humectant as an external additive according to the present invention is a polyol, and at least glycerin, diglycerin, propylene glycol, 1,3-butylene glycol and polyethylene glycol are included. However, it cannot be denied that the above ingredients are contained as long as they do not affect the moisturizing toilet paper to such an extent that they do not deserve. Toilet paper according to the present invention is excellent in a sense of security for the human body, and when the moisturizer is applied, the moisturizer-specific sticky feeling and moisturizing feeling can be felt, so that a sense of security for the human body is provided. descend.
　他方で、本発明に係るトイレットペーパーは、抄紙時に内添する原紙自体の柔らかさや紙力を定める柔軟剤や柔軟保湿剤は添加される。本発明に係るトイレットペーパーに含まれる柔軟剤は、カチオン性脂肪酸アミド系柔軟剤である。本発明に係るトイレットペーパーは、このカチオン性脂肪酸アミド系柔軟剤を含むのがよい。カチオン性脂肪酸アミド系柔軟剤は、リグニン含有による効果の低下がなく、また、繊維表面をコーティングするように作用する。ゆえに、リグニンを含むパルプを高配合しても表面が滑らかで、ごわつき感が顕著に低下し、ふんわり感も高まる。カチオン性脂肪酸アミド系柔軟剤の具体例としては、ポリアルキレンポリアミン類とモノカルボン酸類との反応で得られるアミド系化合物と、エピハロヒドリンとの反応物であるのが望ましい。このカチオン性脂肪酸アミド系柔軟剤であれば効果が発現する。なお、ポリアルキレンポリアミン類とモノカルボン酸類との反応で得られるアミド系化合物と、エピハロヒドリンとの反応物を内添するにあたっては、炭素数が４～２０のアルキル基及び／又はアルケニル基を有する乳化剤、及び水と混合して添加するのがよい。カチオン性脂肪酸アミド系柔軟剤の含有量は必ずしも限定されないが、定着率は５０～６０％の場合、製造時における添加量を０．５～４．０ｋｇ／パルプｔとすればよい。 On the other hand, in the toilet paper according to the present invention, a softening agent or a softening agent that determines the softness and paper strength of the base paper itself that is internally added during papermaking is added. The softener contained in the toilet paper according to the present invention is a cationic fatty acid amide softener. The toilet paper according to the present invention may contain the cationic fatty acid amide softener. The cationic fatty acid amide-based softening agent does not reduce the effect due to the inclusion of lignin, and also acts to coat the fiber surface. Therefore, even if the pulp containing lignin is highly blended, the surface is smooth, the feeling of stiffness is significantly reduced, and the feeling of fluffiness is increased. A specific example of the cationic fatty acid amide-based softening agent is preferably a reaction product of epihalohydrin with an amide-based compound obtained by the reaction of polyalkylene polyamines and monocarboxylic acids. With this cationic fatty acid amide type softener, the effect is exhibited. When internally adding a reaction product of an amide compound obtained by the reaction of polyalkylene polyamines and monocarboxylic acids with epihalohydrin, an emulsifier having an alkyl group and/or an alkenyl group having 4 to 20 carbon atoms is used. , And is preferably mixed with water and added. The content of the cationic fatty acid amide-based softening agent is not necessarily limited, but when the fixing rate is 50 to 60%, the addition amount at the time of production may be 0.5 to 4.0 kg/pulp t.
　さらに、本発明に係るトイレットペーパーは、柔軟保湿剤が内添されているのが望ましい。その含有量は０．２～２．０ｋｇ／パルプｔであるのが望ましい。柔軟保湿剤を含むことで、しなやかさが向上する。特に好ましい柔軟保湿剤は、重量平均分子量５００～１０，０００のポリアルキレンイミンの活性水素に炭素数２～４のアルキレンオキサイドを付加させて得られた化合物に、炭素数１２～２４の高級脂肪酸および／または炭素数１２～２４の高級脂肪酸のエステル化合物を反応させて得られる反応生成物である。この柔軟保湿剤が含まれることで、より柔らかさが向上する。 Furthermore, the toilet paper according to the present invention preferably has a soft moisturizer internally added. The content is preferably 0.2 to 2.0 kg/pulp t. Inclusion of a soft moisturizer improves flexibility. A particularly preferable softening agent is a compound obtained by adding an alkylene oxide having 2 to 4 carbon atoms to active hydrogen of polyalkyleneimine having a weight average molecular weight of 500 to 10,000, and a higher fatty acid having 12 to 24 carbon atoms and And/or a reaction product obtained by reacting an ester compound of a higher fatty acid having 12 to 24 carbon atoms. By including this soft moisturizer, the softness is further improved.
　ここで、本発明に係るトイレットペーパーは、エンボス加工がされていてもよい。そのエンボスパターンは必ずしも限定されるわけではない。エンボスは、マイクロエンボスやドット型のエンボス、デザインエンボス等の適宜のエンボスパターンとすることができる。但し、本発明に係るエンボスパターンは、シングルエンボスと称されるプライ積層状態で付与されるエンボスであるのが望ましい。 Here, the toilet paper according to the present invention may be embossed. The emboss pattern is not necessarily limited. The embossing can be an appropriate embossing pattern such as micro embossing, dot type embossing, design embossing and the like. However, it is preferable that the embossing pattern according to the present invention is an embossing applied in a ply laminated state called a single embossing.
　本発明に係る好適なエンボスパターンは、凹部の面積が１．０～２．５ｍｍ2で、密度が５．０～５０個／ｃｍ2で、エンボス深さが、０．０５～０．５ｍｍである。トイレットペーパーとしての柔らかさが向上するとともに、トイレットロールのようにロール状態における柔らかさが高まり、消費者が手に持った際に柔らかいと感じやすくなる。特に、図１に示すように、紙面全体に、底面が対角Ｌ４×対角Ｌ４＝１．０～１．５×１．０～１．５ｍｍの正方形の凹部３１（図１Ａ）又はその正方形の四方角が対角線外方に向かって延在された略正方形（図１Ｂ）をなす凹部３２が、中心間隔Ｌ５が４．５～５．５ｍｍで幅方向に対する配列角度が４５°で格子状に配列され、かつ、凹部３１（３２）と凹部３１（３２）との間に凹部の四方角同士から延在する谷線部３３を有するものである。なお、谷線部３３は、凹部３１（３２）の四方角が最も深く、凹部間の中間が最も浅くなるように漸次緩やかに断面弓なりに配されているのが望ましい。このエンボスパターンは、柔らかさや便の拭き取り性について優れる。 A preferred embossing pattern according to the present invention has a concave area of 1.0 to 2.5 mm 2 , a density of 5.0 to 50 pieces/cm 2 , and an embossing depth of 0.05 to 0.5 mm. is there. The softness as a toilet paper is improved, and the softness in a roll state like a toilet roll is increased, and it becomes easier for consumers to feel softness when holding it in their hands. In particular, as shown in FIG. 1, a square concave portion 31 (FIG. 1A) whose bottom surface is diagonal L4×diagonal L4=1.0 to 1.5×1.0 to 1.5 mm, or its square is formed on the entire paper surface. The recesses 32 each having a substantially square shape (FIG. 1B) whose diagonals extend outward diagonally are arranged in a grid pattern with a center interval L5 of 4.5 to 5.5 mm and an arrangement angle of 45° with respect to the width direction. The valley line portions 33 are arranged and extend between the recesses 31 (32) and the recesses 31 (32) so as to extend from the four directions of the recesses. In addition, it is desirable that the valley line portion 33 is gradually and gently arranged in a bow shape in cross section so that the squares of the recesses 31 (32) are deepest and the middle of the recesses is shallowest. This embossed pattern is excellent in softness and stool wipeability.
　エンボスの深さは、株式会社キーエンス社製ワンショット３Ｄ測定マクロスコープ　ＶＲ－３２００又はその相当機と、画像解析ソフトウェア「ＶＲ－Ｈ１Ａ」又はその相当ソフトウェアにより測定する。測定は、倍率１２倍、視野面積２４ｍｍ×１８ｍｍの条件で測定する。但し、倍率と視野面積は、エンボス（凹部）の大きさによって、適宜変更することができる。具体的な測定手順は、図２を参照して説明すると、上記ソフトウェアを用いて、平面視点で示される画像部（図中X部分）中の一つのエンボス（凹部）４０の周縁の最長部を横切る線分Ｑ１におけるエンボス深さ（測定断面曲線）プロファイルを得る。このエンボス深さプロファイルの断面曲線からλc：８００μｍ（但し、λｃはＪＩＳ－Ｂ０６０１「３.１.１.２」に記載の「粗さ成分とうねり成分との境界を定義するフィルタ」）より短波長の表面粗さの成分を低域フィルタによって除去して得られる断面視点で示される画像部（図中Ｙ部分）の「輪郭曲線Ｑ２」のうち、上に凸で最も曲がりが強くなる２つの凹部エッジ点Ｐ１，Ｐ２と、凹部エッジ点Ｐ１，Ｐ２で挟まれる最小値を求め、深さの最小値Ｍｉｎとする。さらに、凹部エッジ点Ｐ１，Ｐ２の深さの値の平均値を深さの最大値Ｍａｘとする。このようにして、エンボス深さ＝最大値Ｍａｘ－最小値Ｍｉｎとする。又、凹部エッジ点Ｐ１，Ｐ２のＸ－Ｙ平面上の距離（長さ）を最長部の長さと規定する。上記の上に凸で最も曲がりが強くなる２つの凹部エッジ点Ｐ１，Ｐ２は目視にて選択する。なお、その選択にあたっては、当該測定中のエンボス（凹部）４０の平面視点の画像中の輪郭Ｅを参考としてもよい。同様にして、最長部に垂直な方向での最短部についてもエンボス（凹部）の深さを測定し、大きい方の値をエンボス（凹部）の深さとして採用する。以上の測定を、トイレットペーパー表面の任意の１０個のエンボスについて行い、その平均値を最終的なエンボス深さとする。 The depth of embossing is measured with a one-shot 3D measurement macroscope VR-3200 manufactured by Keyence Corporation or its equivalent machine and image analysis software "VR-H1A" or its equivalent software. The measurement is performed under the conditions of a magnification of 12 and a visual field area of 24 mm×18 mm. However, the magnification and the field of view can be appropriately changed depending on the size of the emboss (recess). The specific measurement procedure will be described with reference to FIG. 2. Using the software described above, the longest part of the peripheral edge of one emboss (recess) 40 in the image part (X part in the drawing) shown in a plan view is determined. Obtain the emboss depth (measurement cross section curve) profile at the crossing line segment Q1. From the cross-section curve of this embossing depth profile, shorter than λc: 800 μm (where λc is “filter that defines the boundary between roughness and waviness components” described in JIS-B0601 “3.1.1.2”). Of the "contour curve Q2" of the image portion (Y portion in the figure) shown by the cross-sectional viewpoint obtained by removing the component of the surface roughness of the wavelength by the low-pass filter, the two that are convex upward and have the strongest bending The minimum value sandwiched between the recess edge points P1 and P2 and the recess edge points P1 and P2 is determined and set as the minimum depth value Min. Further, the average value of the depth values of the recess edge points P1 and P2 is set as the maximum depth value Max. In this way, emboss depth=maximum value Max−minimum value Min. Further, the distance (length) of the recess edge points P1 and P2 on the XY plane is defined as the length of the longest portion. The two concave edge points P1 and P2 that are convex upward and have the strongest bending are visually selected. In the selection, the contour E in the plane view image of the emboss (recess) 40 during the measurement may be referred to. Similarly, the depth of the embossing (recess) is measured also for the shortest part in the direction perpendicular to the longest part, and the larger value is adopted as the depth of the embossing (recess). The above measurement is performed for any 10 embosses on the surface of the toilet paper, and the average value thereof is used as the final emboss depth.
　なお、エンボスパターンの個々の凹部の面積についても、ワンショット３Ｄ測定マクロスコープ　ＶＲ－３２００又はその相当機と、画像解析ソフトウェア「ＶＲ－Ｈ１Ａ」又はその相当ソフトウェアにより測定して得た３Ｄ画像から目視でエンボス凹部の輪郭を確認し、輪郭内部の面積を測定する。トイレットペーパー表面の任意の１０個のエンボスについて行い、その平均値を最終的なエンボス凹部の面積とする。 In addition, the area of each recess of the emboss pattern is also visually checked from the one-shot 3D measurement macroscope VR-3200 or its equivalent machine and the 3D image obtained by measuring with the image analysis software "VR-H1A" or its equivalent software. Check the contour of the embossed recess and measure the area inside the contour. The embossing is performed for any 10 embosses on the surface of the toilet paper, and the average value is used as the final embossed recess area.
　他方で、本発明に係るトイレットペーパーは、１プライの紙厚が１２０～１５０μｍであり、トイレットペーパー全体としての紙厚が４００～６００μｍである。紙厚をこの範囲とすることで柔らかさが向上されたものとなる。トイレットペーパーの紙厚の測定方法は、試験片をＪＩＳ Ｐ ８１１１（１９９８）の条件下で十分に（通常は、８時間程度）調湿した後、同条件下でダイヤルシックネスゲージ（厚み測定器）「ＰＥＡＣＯＣＫ Ｇ型」（尾崎製作所製）を用いて１プライの状態で測定するものとする。具体的には、プランジャーと測定台の間にゴミ、チリ等がないことを確認してプランジャーを測定台の上におろし、前記ダイヤルシックネスゲージのメモリを移動させてゼロ点を合わせ、次いで、プランジャーを上げて試料を試験台の上におき、プランジャーをゆっくりと下ろしそのときのゲージを読み取る。トイレットペーパーがエンボス加工されている場合には、構成する一つの凹部（凸部）が必ず測定台の範囲に入るようにする。なお、深さの異なる凹部が存在する場合には、最も深さの深い凹部が位置するようにする。この測定時には、プランジャーはのせるだけとして押えない。プランジャーの端子は金属製で直径１０ｍｍの円形の平面が紙平面に対し垂直に当たるようにし、この紙厚測定時の荷重は、約７０ｇｆである。なお、紙厚は測定を１０回行って得られる平均値とする。ここで、紙厚の測定時には、エンボス（凹部）の潰れが想定されるが、本発明に係る紙厚は、そのような潰れも含んで測定した値であり、そのような潰れは無視してよい。本紙厚測定において凹部の潰れによって生ずる紙厚差は無視できる。 On the other hand, the toilet paper according to the present invention has a thickness of one ply of 120 to 150 μm, and the total thickness of the toilet paper is 400 to 600 μm. By setting the paper thickness within this range, the softness is improved. To measure the paper thickness of toilet paper, the test piece should be conditioned under JIS P 8111 (1998) sufficiently (usually for about 8 hours), and then dial thickness gauge (thickness measuring instrument) under the same conditions. It shall be measured in the state of 1 ply using "PEACOCK G type" (manufactured by Ozaki Seisakusho). Specifically, check that there is no dust, dust, etc. between the plunger and the measuring table, lower the plunger on the measuring table, move the memory of the dial thickness gauge to set the zero point, then , Raise the plunger and place the sample on the test bench, slowly lower the plunger and read the gauge at that time. If the toilet paper is embossed, make sure that one of the concave parts (convex parts) is within the range of the measuring table. When there are recesses having different depths, the recess having the deepest depth is positioned. During this measurement, the plunger is only placed and cannot be pressed. The terminal of the plunger is made of metal so that a circular flat surface having a diameter of 10 mm hits the plane of the paper perpendicularly, and the load when measuring the paper thickness is about 70 gf. The paper thickness is an average value obtained by performing the measurement 10 times. Here, when measuring the paper thickness, crushing of the emboss (concave portion) is assumed, but the paper thickness according to the present invention is a value measured including such crushing, and such crushing is ignored. Good. In this paper thickness measurement, the paper thickness difference caused by the collapse of the concave portion can be ignored.
　また、本発明に係るトイレットペーパーは、水解性が１０秒以内であり、非常に速い。これは、構成繊維の８０質量％以上、特に１００質量％がリグニンを含む針葉樹クラフトパルプであり、繊維がほぐれやすくなっているためである。水解性が１０秒以内であれば、水洗トイレ等に流水廃棄した際に配管を詰まらせるおそれが各段に小さくなる。この水解性（ほぐれやすさ）の測定は、ＪＩＳ Ｐ ４５０１（１９９３）による。ほぐれやすさの試験は、水３００ｍＬ（水温２０±５℃）を入れた３００ｍＬのビーカーをマグネチックスターラーに載せ、回転子の回転数を６００±１０回転／分になるように調整する。その中に一辺が１００±２ｍｍ角の試験片を投入し、ストップウォッチを押す。回転子の回転数は試験片の抵抗によって、いったん約５００回転に下降し、試験片がほぐれるに従い回転数は上昇する。この回転数が５４０回転までに回復した時点でストップウォッチを止め、その時間を１秒単位で測定する。ほぐれやすさの結果は、試験を５回行い、その平均で表す。回転子は、直径３５ｍｍ、厚さ１２ｍｍの円盤状のものとする。 Also, the toilet paper according to the present invention has a water degradability of 10 seconds or less, which is extremely fast. This is because 80% by mass or more, especially 100% by mass of the constituent fibers are softwood kraft pulp containing lignin, and the fibers are easily disentangled. If the water decomposability is within 10 seconds, the risk of clogging the pipes when flushing the water in a flush toilet or the like is further reduced. The measurement of this water decomposability (easiness of loosening) is according to JIS P4501 (1993). For the test of the ease of loosening, a 300 mL beaker containing 300 mL of water (water temperature 20±5° C.) is placed on a magnetic stirrer, and the rotation speed of the rotor is adjusted to be 600±10 rotations/minute. A test piece of which one side is 100±2 mm square is put therein and the stopwatch is pushed. The rotation speed of the rotor is once lowered to about 500 rotations due to the resistance of the test piece, and the rotation speed is increased as the test piece is loosened. The stopwatch is stopped when the number of revolutions is recovered to 540, and the time is measured in units of 1 second. The result of easiness of loosening is expressed as an average of 5 times of tests. The rotor has a disk shape with a diameter of 35 mm and a thickness of 12 mm.
　本発明に係るトイレットペーパーは、抄紙原料のカナダ標準濾水度が、６５０ｃｃ以上であるのが望ましい。抄紙原料のカナダ濾水度が６５０ｃｃ以上とは、ほとんどパルプ繊維が叩解されていないか、未叩解原料である繊維であるため、水解性により優れるものとしやすい。 In the toilet paper according to the present invention, the Canadian standard freeness of the papermaking material is preferably 650 cc or more. When the Canadian freeness of the papermaking raw material is 650 cc or more, the pulp fibers are hardly beaten or are fibers which are unbeaten raw materials, so that the water-solubility is likely to be excellent.
　ここで、本発明に係るトイレットペーパーは、縦方向の乾燥引張強度が４００ｃＮ／２５ｍｍ以上９００ｃＮ／２５ｍｍ以下、であるのが望ましい。横方向の乾燥引張強度は２００ｃＮ／２５ｍｍ以上４５０ｃＮ／２５ｍｍ以下、であるのが望ましい。この範囲であれば十分に使用に耐えうる。 Here, the toilet paper according to the present invention preferably has a dry tensile strength in the longitudinal direction of 400 cN/25 mm or more and 900 cN/25 mm or less. The dry tensile strength in the transverse direction is preferably 200 cN/25 mm or more and 450 cN/25 mm or less. Within this range, it can be used sufficiently.
　なお、紙の縦方向とは、ＭＤ方向とも呼ばれ、抄紙の際の流れ方向である。紙の横方向は、ＣＤ方向とも呼ばれ、抄紙の際の流れ方向（ＭＤ方向）に直行する方向である。また、本発明に係る乾燥引張強度は、ＪＩＳ Ｐ ８１１３（２００６）に基づいて測定した値であり、次のようにして測定する。試験片は縦・横方向ともに巾２５ｍｍ（±０．５ｍｍ）×長さ１５０ｍｍ程度に裁断したものを用いる。試験片は複数プライのまま測定する。試験機は、ミネベア株式会社製ロードセル引張り試験機ＴＧ－２００Ｎ及びこれに相当する相当機を用いる。なお、つかみ間隔１００ｍｍ、引張速度は１００ｍｍ／ｍｉｎに設定する。測定は、試験片の両端を試験機のつかみに締め付け、紙片を上下方向に引張り荷重をかけ、紙が破断する時の指示値（デジタル値）を読み取る手順で行う。縦方向、横方向ともに各々５組の試料を用意して各５回ずつ測定し、その測定値の平均を各方向の乾燥引張強度とする。製品は製品のプライ数に合わせて、複数枚重ねて乾燥引張強度を測定した。原紙についても製品のプライ数に合わせて、複数枚重ねて乾燥引張強度を測定した。 Note that the longitudinal direction of paper is also called the MD direction, and is the flow direction during papermaking. The lateral direction of the paper is also called the CD direction and is a direction orthogonal to the flow direction (MD direction) at the time of papermaking. Further, the dry tensile strength according to the present invention is a value measured based on JIS P8113 (2006), and is measured as follows. A test piece cut into a width of 25 mm (±0.5 mm) and a length of 150 mm is used in both the vertical and horizontal directions. The test piece is measured in multiple plies. As the tester, a load cell tensile tester TG-200N manufactured by Minebea Co., Ltd. and an equivalent machine corresponding thereto are used. The gripping interval is set to 100 mm and the pulling speed is set to 100 mm/min. The measurement is performed by tightening both ends of the test piece to the grips of the tester, applying a tensile load to the paper piece in the vertical direction, and reading the indicated value (digital value) when the paper breaks. Five sets of samples are prepared in each of the vertical direction and the horizontal direction, and each set is measured 5 times, and the average of the measured values is taken as the dry tensile strength in each direction. According to the number of plies of the product, a plurality of products were stacked and the dry tensile strength was measured. As for the base paper, the dry tensile strength was measured by stacking a plurality of sheets according to the number of plies of the product.
　また、本発明に係るトイレットペーパーは、縦方向の湿潤引張強度が５０ｃＮ／２５ｍｍ以上１００ｃＮ／２５ｍｍ以下、であるのが望ましい。横方向の湿潤引張強度は２５ｃＮ／２５ｍｍ以上５０ｃＮ／２５ｍｍ以下、であるのが望ましい。湿潤引張強度は、ＪＩＳ　Ｐ　８１３５（１９９８）に基づいて測定した値であり、次のようにして測定する。試験片は縦・横方向ともに巾２５ｍｍ（±０．５ｍｍ）×長さ１５０ｍｍ程度に裁断したものを用いる。ティシュペーパーは複数プライの場合は複数プライのまま測定する。試験機は、ミネベア株式会社製ロードセル引張り試験機ＴＧ－２００Ｎ及びこれに相当する相当機を用いる。なお、つかみ間隔１００ｍｍ、引張速度は５０ｍｍ／ｍｉｎに設定する。試験片は、１０５℃の乾燥機で１０分間のキュアリングを行ったものを用いる。試験片の両端を試験機のつかみに締め付けた後、水を含ませた平筆を用い、試験片の中央部に約１０ｍｍ幅で水平に水を付与し、その後、直ちに紙片に対して上下方向に引張り荷重をかけ、紙が破断する時の指示値（デジタル値）を読み取る手順で測定を行う。縦方向、横方向ともに各々５組の試料を用意して各５回ずつ測定し、その測定値の平均を各方向の湿潤引張強度とする。湿潤引張強度においても製品のプライ数に合わせて、複数枚重ねて湿潤引張強度を測定した。 Further, the toilet paper according to the present invention preferably has a wet tensile strength in the longitudinal direction of 50 cN/25 mm or more and 100 cN/25 mm or less. The wet tensile strength in the transverse direction is preferably 25 cN/25 mm or more and 50 cN/25 mm or less. The wet tensile strength is a value measured based on JIS P8135 (1998), and is measured as follows. A test piece cut into a width of 25 mm (±0.5 mm) and a length of 150 mm is used in both the vertical and horizontal directions. If the tissue paper has multiple plies, measure it as it is. As the tester, a load cell tensile tester TG-200N manufactured by Minebea Co., Ltd. and an equivalent machine corresponding thereto are used. The gripping interval is set to 100 mm and the pulling speed is set to 50 mm/min. As the test piece, a test piece that has been cured by a dryer at 105° C. for 10 minutes is used. After tightening both ends of the test piece to the grips of the tester, use a flat brush soaked in water to apply water horizontally to the center of the test piece with a width of about 10 mm, and then immediately move it up and down with respect to the paper piece. A tensile load is applied to and the measurement is performed by reading the indicated value (digital value) when the paper breaks. Five sets of samples are prepared for each of the vertical direction and the horizontal direction, and each set is measured 5 times, and the average of the measured values is taken as the wet tensile strength in each direction. Also in terms of wet tensile strength, the wet tensile strength was measured by stacking a plurality of sheets according to the number of plies of the product.
　本発明に係るトイレットペーパーは、表面性を示す指標であるＭＭＤの値が７．５以上９．５以下であることが望ましい。ＭＭＤが７．５未満であると表面が滑り過ぎて拭き取り性が低下し、９．５超であると肌触りが悪くトイレットペーパーとしての用途に適さないおそれがある。なお、ＭＭＤの測定は、摩擦子の接触面を所定方向に２０ｇ／ｃｍの張力が付与された測定試料の表面に対して２５ｇの接触圧で接触させながら、張力が付与された方向と略同じ方向に速度０．１ｃｍ／ｓで２ｃｍ移動させ、このときの、摩擦係数を、摩擦感テスター　ＫＥＳ－ＳＥ（カトーテック株式会社製）又はその相当機を用いて測定する。その摩擦係数を摩擦距離（移動距離＝２ｃｍ）で除した値がＭＭＤである。摩擦子は、直径０．５ｍｍのピアノ線Ｐを２０本隣接させてなり、長さ及び幅がともに１０ｍｍとなるように形成された接触面を有するものとする。接触面には、先端が２０本のピアノ線Ｐ（曲率半径０．２５ｍｍ）で形成された単位膨出部が形成されているものとする。 It is desirable that the toilet paper according to the present invention has an MMD value, which is an index of surface properties, of 7.5 or more and 9.5 or less. If the MMD is less than 7.5, the surface is too slippery and the wiping property is deteriorated. If the MMD is more than 9.5, the skin feels poor and it may not be suitable for use as toilet paper. The measurement of MMD is substantially the same as the direction in which the tension is applied while the contact surface of the friction element is brought into contact with the surface of the measurement sample to which a tension of 20 g/cm is applied in the predetermined direction with a contact pressure of 25 g. In the direction of 2 cm at a speed of 0.1 cm/s, and the friction coefficient at this time is measured using a friction tester KES-SE (manufactured by Kato Tech Co., Ltd.) or its equivalent machine. The value obtained by dividing the friction coefficient by the friction distance (moving distance=2 cm) is MMD. It is assumed that the friction element has 20 piano wires P having a diameter of 0.5 mm adjacent to each other and has a contact surface formed so that both length and width are 10 mm. It is assumed that the contact surface is formed with a unit bulge portion having a tip of 20 piano wires P (radius of curvature 0.25 mm).
　本実施形態のトイレットペーパーは、ソフトネスは、１．８ｃＮ／１００ｍｍ以上３．５ｃＮ／１００ｍｍ以下であるのが望ましい。ソフトネスは、その値が低いほど柔らかいとされる柔らかさの指標の一つである。ティシュペーパーやトイレットペーパーであれば、１．０ｃＮ／１００ｍｍ以下であれば十分に柔らかいとされる。ソフトネスの測定は、ＪＩＳ　Ｌ　１０９６　Ｅ法（１９９０）に準じたハンドルオメータ法に基づいて測定した値をいう。但し、試験片は１００ｍｍ×１００ｍｍの大きさとし、クリアランスは５ｍｍとする。１プライで縦方向、横方向の各々５回ずつ測定し、その全１０回の平均値とする、なお、ソフトネスは、無単位であるが、試験片の大きさを考慮して、ｃＮ／１００ｍｍを単位として表されることもある。 The softness of the toilet paper of this embodiment is preferably 1.8 cN/100 mm or more and 3.5 cN/100 mm or less. Softness is one of the indices of softness that the lower the value, the softer it is. For tissue paper or toilet paper, 1.0 cN/100 mm or less is considered to be sufficiently soft. The softness is a value measured based on the handle odometer method according to JIS L 1096 E method (1990). However, the test piece has a size of 100 mm×100 mm, and the clearance is 5 mm. Each ply is measured 5 times in the longitudinal direction and 5 times in the lateral direction, and the average value of all 10 times is taken. The softness is unitless, but cN/ It may be expressed in units of 100 mm.
　本実施形態のトイレットペーパーにおいては、乾燥引張強度及び湿潤引張強度の調整は、乾燥紙力増強剤や湿潤紙力増強剤の紙力剤を用いることなく調整することができる。そして、特に、使用者の安心感の点から紙力剤を含まないのが望ましい。本発明に係るトイレットペーパーでは、紙力剤を含まなくとも繊維長の長い針葉樹クラフトパルプを８０質量％以上、特に１００質量％含むように高配合することで、繊維間の絡みが確保され、使用に十分な強度とすることができる。そのうえで、リグニンを含むものであるため水解性にも優れる。つまり、紙力剤を用いなくとも十分な強度が確保でき、さらに水解性にも優れるようにできる。 In the toilet paper of this embodiment, the dry tensile strength and the wet tensile strength can be adjusted without using a paper strength agent such as a dry paper strength enhancer or a wet paper strength enhancer. In particular, it is desirable that the paper strength agent is not included from the viewpoint of the user's sense of security. In the toilet paper according to the present invention, even if it does not contain a paper-strengthening agent, a high content of 80% by mass or more, particularly 100% by mass, of a softwood kraft pulp having a long fiber length ensures a entanglement between fibers, and it is used. Can have sufficient strength. In addition, since it contains lignin, it is also excellent in water decomposability. That is, it is possible to secure sufficient strength without using a paper-strengthening agent and also to improve water degradability.
　なお、本実施形態のトイレットペーパーにおいては、上記のとおり乾燥紙力増強剤や湿潤紙力増強剤を用いないのが望ましいが、水解性を阻害しない範囲で、必要に応じて用いてもよい。ここでいう乾燥紙力増強剤は、澱粉、ポリアクリルアミド、ＣＭＣ（カルボキシメチルセルロース）若しくはその塩であるカルボキシメチルセルロースナトリウム、カルボキシメチルセルロースカルシウム、カルボキシメチルセルロース亜鉛が挙げられる。 In the toilet paper of the present embodiment, it is desirable not to use a dry paper strength enhancer or a wet paper strength enhancer as described above, but it may be used if necessary as long as it does not impair water decomposability. Examples of the dry paper strength enhancer used herein include starch, polyacrylamide, CMC (carboxymethyl cellulose) or a salt thereof such as sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, and zinc carboxymethyl cellulose.
　湿潤紙力増強剤は、ポリアミドポリアミンエピクロルヒドリン樹脂、尿素樹脂、酸コロイド・メラミン樹脂、熱架橋性塗工ＰＡＭ、星光ＰＭＣ株式会社社製のＴＳ－２０、グリオキシル化ポリアクリルアミド、カチオン性グリオキシル化ポリアクリルアミドなどのポリマーアルデヒド－官能性化合物、グリオキザールの二価のアルデヒドで変性したアクリルアミドモノマーと他の共重合可能な不飽和モノマーの共重合体又はジアルデヒド澱粉が挙げられる。 The wet paper strength enhancer is polyamide polyamine epichlorohydrin resin, urea resin, acid colloid/melamine resin, thermally crosslinkable coating PAM, TS-20 manufactured by Seikou PMC Co., glyoxylated polyacrylamide, cationic glyoxylated polyacrylamide. Polymeric aldehyde-functional compounds such as, copolymers of glyoxal divalent aldehyde-modified acrylamide monomers with other copolymerizable unsaturated monomers or dialdehyde starch.
　他方、本実施形態のトイレットペーパーは、図３に示されるように、帯状のトイレットペーパー１０を紙管（管芯とも称される）２０にロール状に巻いたトイレットロールの形態とするに適する。 On the other hand, the toilet paper of the present embodiment is suitable in the form of a toilet roll in which a strip-shaped toilet paper 10 is wound around a paper tube (also referred to as a tube core) 20 in a roll shape as shown in FIG.
　この本発明に係るトイレットロールは、巻径Ｌ２（直径）１１０～１１５ｍｍであるのが望ましい。トイレットロールの巻径は、ＪＩＳ　Ｐ　４５０１において、１２０ｍｍ以下と定められており、一般的なトイレットロールをセットするためのホルダーはこの１２０ｍｍを基準として作成されている。本発明のトイレットロールは、巻径が１１０～１１５ｍｍであり、一般的なホルダーに十分にセット可能な大きさとなっている。ここで、巻径は、ムラテックＫＤＳ株式会社製ダイヤメータールール又はその相当機を用いて測定した値である。測定値は、幅方向に場所を変えて３個所測定した平均値とする。なお、同一製造ロット品における平均値は５個のロールの平均値とする。 It is desirable that the toilet roll according to the present invention has a winding diameter L2 (diameter) of 110 to 115 mm. The roll diameter of the toilet roll is stipulated in JIS P4501 to be 120 mm or less, and the holder for setting a general toilet roll is created based on this 120 mm. The toilet roll of the present invention has a winding diameter of 110 to 115 mm, and has a size that can be sufficiently set in a general holder. Here, the winding diameter is a value measured by using a diameter rule manufactured by Muratec KDS Co., Ltd. or an equivalent machine. The measured value is an average value measured at three locations by changing the location in the width direction. The average value of the same production lot product is the average value of 5 rolls.
　一方、係るトイレットロールは、巻き長さが２０～４０ｍであるのが望ましく、その際、巻密度を０．２０～０．３０ｍ／ｃｍ2とするのが望ましい。ここでの巻密度とは、巻長さ（ｍ）÷実断面積で算出される値である。実断面積とは、｛（巻径／２）×（巻径／２）×π－（紙管外径／２）×（紙管外径／２）×π｝（単位；ｃｍ2）で算出される値である。つまり、端面の面積から紙管開口端側面積を差し引いた面積である。本発明に係るトイレットペーパーは、上記のロール形態において、その巻き密度が０．２０～０．２８ｍ／ｃｍ2の範囲にあるとロールを周面で手に持った際に顕著に柔らかさを感じるものとなる。なお、紙管外径（紙管径）Ｌ３は、一般的な大きさと同様に３５～４５ｍｍφとするのが望ましい。 On the other hand, such a toilet roll preferably has a winding length of 20 to 40 m, and at that time, a winding density of 0.20 to 0.30 m/cm 2 . The winding density here is a value calculated by winding length (m)/actual cross-sectional area. The actual cross-sectional area is {(roll diameter/2)×(roll diameter/2)×π−(paper tube outer diameter/2)×(paper tube outer diameter/2)×π} (unit: cm 2 ). It is a calculated value. In other words, it is the area obtained by subtracting the area of the paper tube opening end side from the area of the end surface. When the roll density of the toilet paper according to the present invention is in the range of 0.20 to 0.28 m/cm 2 in the above roll form, the toilet paper is remarkably soft when the roll is held in the hand. Will be things. The outer diameter of the paper tube (paper tube diameter) L3 is preferably 35 to 45 mmφ, similar to a general size.
　また、本発明のトイレットペーパーは、ロールの巻き固さが、１．８～２．２ｍｍであるのが望ましい。ロールの巻き固さ（ｍｍ）（Ｔ０－ＴＭ）の測定には、カトーテック株式会社製「ハンディー圧縮試験機　ＫＥＳ－Ｇ５」を用いる。鋼板で形成された水平な台座上にトイレットロールＴＲをその中心軸が水平になるように横置きし、ロール胴部外周の上面中心に圧縮面積２ｃｍ2の円形平面をもつ鋼板端子を当接させ、この当接した状態をゼロ点として、かかるゼロ点から前記鋼板端子を鉛直下方に速度１０ｍｍ／分で移動させてトイレットロールを圧縮する。圧縮荷重０．５ｇｆ／ｃｍ2のときの押しみ量をＴ０（ｍｍ）、圧縮荷重を５０ｇｆ／ｃｍ2のときの押しみ量をＴＭ（ｍｍ）として、（Ｔ０－ＴＭ）（ｍｍ）をロールの巻き固さ（ｍｍ）とする。ロールの巻き固さ（ｍｍ）が大きいほど、５０ｇｆ／ｃｍ2まで押し込んだ時の押し込み深さが大きく、ふんわりとした紙質であることを示す。すなわち、ふんわり感に対応する。なお、上記巻き長さ及び巻き密度であれば、十分に係る巻き固さにできる。 In the toilet paper of the present invention, it is desirable that the roll winding hardness is 1.8 to 2.2 mm. To measure the roll hardness (mm) (T0-TM), "Handy compression tester KES-G5" manufactured by Kato Tech Co., Ltd. is used. Toilet roll TR is placed sideways on a horizontal pedestal made of steel plate so that its central axis is horizontal, and a steel plate terminal having a circular flat surface with a compression area of 2 cm 2 is brought into contact with the center of the upper surface of the outer periphery of the roll body. With this abutting state as the zero point, the steel plate terminal is moved vertically downward from the zero point at a speed of 10 mm/min to compress the toilet roll. The amount I press when the compressive load 0.5gf / cm 2 T0 (mm) , the amount try pressing when the compressive load 50 gf / cm @ 2 as a TM (mm), the roll (T0-TM) (mm) Roll hardness (mm). The larger the winding hardness (mm) of the roll, the larger the pressing depth when pressed to 50 gf/cm@2, indicating that the paper quality is fluffy. That is, it corresponds to a soft feeling. It should be noted that the above winding length and winding density can provide sufficient winding hardness.
　さらに、本発明のトイレットロールは、圧縮仕事量（ＷＣ）が、３．６～４．６ｇｆ・ｃｍ／ｃｍ2であるのが望ましい。圧縮仕事量（ＷＣ）は、ロールに鋼板端子を０．５ｇｆ／ｃｍ2で接してから５０ｇｆ／ｃｍ2まで押し込んだ際の仕事量であり、圧縮仕事量（ＷＣ）が大きいほど、押し込み初期の反発力が弱いためロールを掴んだ瞬間に柔らかく感じ、その後、圧縮荷重を通常ロールを掴むときの５０ｇｆ／ｃｍ2まで深く押し込むと、ロールが柔らかく、ふんわりし品質であると評価できる。 Further, the toilet roll of the present invention preferably has a compression work amount (WC) of 3.6 to 4.6 gf·cm/cm 2 . Compression work amount (WC) is an amount of work when pushed to 50 gf / cm 2 from contact with steel pins to roll 0.5 gf / cm 2, as the amount of compression work (WC) is large, the initial pushing Since the repulsive force is weak, it feels soft at the moment of gripping the roll, and when the compression load is then pushed deeply to 50 gf/cm 2 when gripping the roll, the roll can be evaluated as soft and fluffy.
　本発明に係るトイレットペーパーは、繊維の８０～１００質量％が酸素蒸解され塩素漂白されていないリグニンを含む繊維長の長い針葉樹クラフトパルプであり、繊維間同士の結合が弱いため、上記のロール形態とした際に、クッション性に優れ手に持ったさいに上記のとおり柔らかさを感じやすい。 The toilet paper according to the present invention is a long-fiber softwood kraft pulp containing lignin in which 80 to 100% by mass of the fiber has been digested with oxygen and which has not been bleached with chlorine. Since the bonds between the fibers are weak, the above roll form is used. In that case, the cushioning property is excellent and the softness is easily felt as described above when held in the hand.
　以下、実施例を参照しながらさらに本発明にかかるトイレットペーパーの効果について説明する。 The effects of the toilet paper according to the present invention will be further described below with reference to examples.
　次いで、本発明のトイレットペーパーの実施例及び比較例について「柔らかさ」、「ふんわり感」、「厚み感」、「使用時の破れ、強さ」について官能評価を行った。 Next, a sensory evaluation was performed on the examples of the toilet paper of the present invention and the comparative examples regarding "softness", "softness", "thickness", and "tear and strength during use".
　各例に係るトイレットロールの構成及びトイレットペーパーの物性・組成は、下記表１のとおりである。 The composition of the toilet roll and the physical properties and composition of the toilet paper according to each example are as shown in Table 1 below.
　官能評価は、被験者１８名に実際に各例に係るロール状にしたトイレットペーパーを実際に使用させ「柔らかさ」、「ふんわり感」、「厚み感」、「使用時の破れ、強さ」の各項目について、比較例３（従来品）を基準として、相対評価を行なうこととした。評価は、比較例３を４点（中央値）として、良い場合に７点まで、悪い場合に１点まで、１点ごとに差をつけて点数付けを行い、その平均値を算出して判断することとした。 The sensory evaluation was performed by having 18 test subjects actually use the rolled toilet paper according to each example, and the "softness," "softness," "thickness," "tear, strength during use" With respect to each item, relative evaluation was performed based on Comparative Example 3 (conventional product). The evaluation was made by setting Comparative Example 3 to 4 points (median value), scoring up to 7 points in the case of good and 1 point in the case of bad, and scoring each point, and calculating the average value to judge. It was decided to.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　本発明に係る実施例は、官能評価において優れた結果となった。また、水解性については、各段に優れた結果となった。また、巻き密度がほぼ同様の比較例１と比べても、ロールにした際における巻き固さ及び圧縮仕事量（ＷＣ）において優位な測定結果が得られた。さらに、強度についても使用時の破れのない十分な強度が確保されている測定結果が得られた。 The examples according to the present invention gave excellent results in sensory evaluation. Moreover, regarding the water decomposability, excellent results were obtained. Further, even when compared with Comparative Example 1 in which the winding densities are almost the same, superior measurement results were obtained in the winding hardness and the compression work (WC) when formed into a roll. Further, as for the strength, a measurement result was obtained in which a sufficient strength without breakage during use was secured.
　このように、本発明に係るトイレットペーパーは、シャワートイレで使用するような場面において安心できる厚み感があり、柔らかさが十分で、さらに水解性に優れ、使用時における人体への安心感があるものである。 As described above, the toilet paper according to the present invention has a thickness feeling that can be relieved in a situation where it is used in a shower toilet, has sufficient softness, and further has excellent water decomposability, and has a sense of security for the human body during use. It is a thing.
　１…トイレットロール、１０…トイレットペーパー、２０…紙管（管芯）、Ｌ１…トイレットロールの巻径（直径）、Ｌ２…トイレットロールの管芯の直径、Ｌ３…トイレットロールの幅、３１，３２…凹部、３３…谷線部。 1... Toilet roll, 10... Toilet paper, 20... Paper tube (tube core), L1... Toilet roll winding diameter (diameter), L2... Toilet roll tube core diameter, L3... Toilet roll width, 31, 32 ...Recessed portion, 33... valley line portion.

Claims (1)

  1. 　３～４プライのトイレットペーパーであって、
    　繊維の８０～１００質量％が酸素蒸解され塩素漂白されていない針葉樹クラフトパルプであり、
    　カチオン性脂肪酸アミド系柔軟剤を含み、
    　１プライの坪量が１２．５～１５．５ｇ／ｍ2であり、
    　１プライの紙厚が１２０～１５０μｍであり、トイレットペーパー全体としての紙厚が４００～６００μｍであり、
    　水解性が１０秒以下である、
    　ことを特徴とするトイレットペーパー。     3-4 ply toilet paper,
    80 to 100% by mass of the fiber is softwood kraft pulp that has been digested with oxygen and not bleached with chlorine,
    Contains cationic fatty acid amide softener,
    The basis weight of one ply is 12.5 to 15.5 g/m 2 ,
    The paper thickness of one ply is 120 to 150 μm, and the total paper thickness of the toilet paper is 400 to 600 μm,
    Water degradability is 10 seconds or less,
    Toilet paper that is characterized.
PCT/JP2019/045729 2018-11-30 2019-11-22 Toilet paper WO2020110923A1 (en)

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