WO2021166557A1 - Papier ouaté hygiénique et son processus de production - Google Patents

Papier ouaté hygiénique et son processus de production Download PDF

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Publication number
WO2021166557A1
WO2021166557A1 PCT/JP2021/002401 JP2021002401W WO2021166557A1 WO 2021166557 A1 WO2021166557 A1 WO 2021166557A1 JP 2021002401 W JP2021002401 W JP 2021002401W WO 2021166557 A1 WO2021166557 A1 WO 2021166557A1
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WO
WIPO (PCT)
Prior art keywords
paper
mass
tissue paper
product
chemical solution
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PCT/JP2021/002401
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English (en)
Japanese (ja)
Inventor
慎忠 富岡
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大王製紙株式会社
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Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2021166557A1 publication Critical patent/WO2021166557A1/fr

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    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • 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 sanitary tissue paper.
  • Typical examples of this type of sanitary tissue paper are toilet paper and tissue paper. All of them are required to have flexibility, but in particular, toilet paper is required to be water-decomposable, and wipe paper is required to be wipeable.
  • Patent Document 1 a wet tissue having water solubility, which is packaged in a wet state impregnated with water, is also known (Patent Document 1).
  • wipe paper is coated with an oil-based chemical solution (lotion), but there are still drawbacks such as giving a sticky feeling and leaving oil when wiping.
  • a main object of the present invention is to provide a water-decomposable sanitary thin paper that is soft to the touch, has sufficient strength, and is excellent in wiping property, and a method for producing the same.
  • the present invention for solving this problem It is made by stacking 3 or 4 sheets of tissue paper.
  • Basis weight per product is 13.5-19.5 g / m 2 .
  • An oil-based chemical solution containing 30% by mass or more of an oily component is applied in an amount of 3.0 to 20.0% by mass.
  • a sanitary tissue paper having a water solubility of 100 seconds or less according to JIS P 4501 of the product.
  • the Canadian freedom is 300 for the pulp containing 30 to 85% by mass of NBKP in the pulp, and the paper material containing the dry paper strength enhancer without containing the temporary wet strength enhancer.
  • a method for producing sanitary tissue paper which comprises a step of obtaining a base paper through beating of about 600 CSF.
  • the present invention is a water-decomposable sanitary thin paper having sufficient strength and excellent wiping property, and a method for producing the same.
  • Tissue paper can be produced by subjecting a papermaking raw material mainly made of raw material pulp to a known papermaking process, specifically, a wire part, a press part, a dryer part, a size press, a calendar part, or the like.
  • a papermaking raw material mainly made of raw material pulp
  • a known papermaking process specifically, a wire part, a press part, a dryer part, a size press, a calendar part, or the like.
  • appropriate chemicals such as dispersants, caustic soda, pH adjusters such as aqueous ammonia, defoamers, preservatives, fluorescent dyes, mold release agents, water resistant agents, flow modifiers, and yield improvers.
  • pH adjusters such as aqueous ammonia, defoamers, preservatives, fluorescent dyes, mold release agents, water resistant agents, flow modifiers, and yield improvers.
  • the raw material pulp used as a raw material for papermaking is not particularly limited, and an appropriate raw material pulp can be selected and used.
  • the raw material pulp for example, it is desirable to use kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP) and softwood bleached kraft pulp (NBKP).
  • KP kraft pulp
  • the raw material pulp is preferably a mixture of NBKP and LBKP for the purpose of making it a common product of toilet paper and tissue paper.
  • Recycled paper pulp may be blended as appropriate, but in terms of texture and the like, it is preferably composed of only NBKP and LBKP.
  • NBKP: LBKP 35: 65 to 65:35 is particularly preferable.
  • the beating degree is 450 to 650 CSF in Canadian freedom, and in particular, the beating degree is 500 to 600 CSF.
  • the product according to the present invention shall be soft and soft to the touch, and may be used for wiping off dirt on the surface of articles such as furniture and equipment in addition to the skin, that is, tearing when wiping the product. It is desirable that the product has a high drying strength so as not to cause the above.
  • the drying strength (longitudinal direction) of the product is preferably 300 to 850 cN / 25 mm, particularly preferably 400 to 700 cN / 25 mm. Further, the drying strength (horizontal direction) becomes important in relation to the application, and 110 to 400 cN / 25 mm, particularly 160 to 250 cN / 25 mm is preferable. If the drying strength is low, tearing or the like will occur at the time of wiping, and if the drying strength is excessively high, the softness and touch will be reduced.
  • the dry paper strength enhancer is not particularly limited, and carboxymethyl cellulose (CMC), polyacrylamide (PAM), polyvinyl alcohol (PVA) and the like can be exemplified.
  • CMC carboxymethyl cellulose
  • PAM polyacrylamide
  • PVA polyvinyl alcohol
  • the use of cationized starch, cationic or amphoteric polyacrylamide-based copolymers is recommended.
  • the dry paper strength enhancer is applied to the entire 3 or 4 sheets, and is preferably applied to the intermediate sheet because the water-based moisturizing chemical solution is mainly applied to the outer layer sheet. ..
  • modified starch, polyacrylamide, polyvinyl alcohol (PVA), etc. are applied to one outer surface or both outer surfaces of the intermediate sheet by roll transfer coating or non-contact by spraying. (Size press and nip coat method are not desirable) and other forms can be illustrated.
  • a dry paper strength enhancer is not applied, and a small amount of the dry paper strength enhancer can be applied without affecting the flexibility and surface properties of the product.
  • the amount of the dry paper strength enhancer applied is preferably 10 to 17 kg / t, particularly 12 to 15 kg / t, in the weight of the dried fibers of the base paper.
  • the applied amount of the dry paper strength enhancer means the applied amount to one or two intermediate sheets, not the applied amount in the laminated state.
  • the Canadian freeness is 300 to 600 CSF, especially 350 to 500 CSF. Is desirable to obtain. Then, in order to obtain water solubility, it is desirable to obtain a paper material that does not contain a temporary wetting paper strength enhancer.
  • the strong NBKP fibers are entangled with each other, and the fibrilization strengthens the interfiber bond. Obtainable.
  • the dry paper strength enhancer is applied to the intermediate sheet, and the dry paper strength enhancer is not applied to both outer layer sheets, and when applied, it affects the flexibility and surface properties of the product. Apply in a small amount (for example, 3 kg / t or less), and apply a water-based moisturizing chemical solution to both outer layer sheets without including a temporary moisturizing paper strength enhancer. As described above, in order to make the outer layer sheet and the inner layer sheet have different roles, it is necessary to use three or four laminated sheets.
  • a softener for example, fatty acid ester compound, fatty acid amide compound (surfactant)
  • bulkiness assuming that the paper thickness is high with respect to the basis weight
  • an agent for example, oil-based or sugar-based nonionic surfactant, higher alcohol-based, fatty acid ester compound, polyoxyalkylene adduct, etc.
  • the addition of softeners and bulking agents is limited, and this is preferably no addition. When added, it is preferably 5 kg / t or less, particularly 1 kg / t or less per absolute dry mass of pulp.
  • Temporal wet paper strength enhancer is a term known to those skilled in the art, and temporarily prevents the paper strength from being lowered due to the absorption of water, causing troubles such as running out of paper and deteriorating operability. Therefore, the wet strength of the base paper is maintained during the time from the application of the wet paper strength enhancer to the winding process, and it is constant when used after becoming sanitary tissue paper (under a large amount of water such as a flush toilet). The wet strength is lost after a lapse of time.
  • this "temporary wetting paper strength enhancer” examples include a polyamide polyamine resin (PA resin) represented by Herculis Creptrol 190 and a polyamide amine epichlorohydrin (PAE resin) represented by Hercules Kaimen 557H. ), Cationic polyamide resin, polyvinyl alcohol (PVA), polyamide plasticant addition product, polyamide softener addition product, modified polyamide amine, polyvinyl acetate and the like, and these are used alone or in combination.
  • PA resin polyamide polyamine resin
  • PAE resin polyamide amine epichlorohydrin
  • the "temporary wet paper strength enhancer" can be added in an amount of 5 kg / t or less, particularly 2 kg / t or less of the dry fiber weight of the base paper, it is desirable not to add it in order to ensure reliable water solubility. ..
  • the basis weight per sheet (ply) of the base paper is preferably 13.5 to 19.5 g / m 2 , and particularly preferably 14.5 to 18.0 g / m 2 . If the basis weight is low, the wiping property is not sufficient, while if it is excessively high, the flexibility and the touch property are deteriorated. It is preferable that the basis weight of each ply of the base paper is the same in terms of operability and economy, but if necessary, it may be different within the basis weight range.
  • Uncreped base paper or, preferably creped base paper is rolled up (3 or 4 rolls), and the base paper unwound from the primary raw fabric roll is laminated, contact embossed, and then surface smoothed by a calendar.
  • a 3- or 4-ply laminated base paper can be obtained.
  • the 3- or 4-ply laminated base paper can be wound as a roll. If necessary, "in addition to contact embossing, design embossing for the purpose of bulkiness and flexibility can be formed.
  • the crepe rate is preferably 10 to 30%.
  • the crepe ratio is represented by [((peripheral speed of the dryer at the time of papermaking)-(peripheral speed of the reel at the time of papermaking)) / (peripheral speed of the dryer at the time of papermaking)] ⁇ 100.
  • the paper thickness per product (ply) is preferably 60 to 130 ⁇ m, particularly 70 to 110 ⁇ m, and more preferably 80 to 100 ⁇ m.
  • the reasons for the upper and lower limits of the numerical range are the same as the reasons for basis weight.
  • the raw fabric roll is set in a so-called rotary interfolder, and in the process from feeding to folding, an oil-based chemical solution is applied to one of the laminated sheets or by spray coating. Applicable to both outer layers.
  • the chemical solution component content of the obtained product is lower in the intermediate sheet (ply) than in the outer layer sheet.
  • the chemical solution component content becomes lower in the order of the outer layer sheet to which the aqueous chemical solution is applied, the intermediate sheet, and the other outer layer sheet.
  • the water-based chemical solution in the present invention is preferably an oil-based chemical solution containing 30% by mass or more, particularly 38% by mass or more of an oily component. It is desirable that this oil-based chemical solution is applied to the base paper in an amount of 3.0 to 20.0% by mass, particularly 5.0 to 18.0% by mass.
  • the oily components are not limited to liquid paraffin, mineral oils such as vaseline, jojoba oil, argan oil, camellia oil, macadamia nut oil, olive oil, apricot kernel oil, avocado oil, evening primrose oil, and wheat jam.
  • mineral oils such as vaseline, jojoba oil, argan oil, camellia oil, macadamia nut oil, olive oil, apricot kernel oil, avocado oil, evening primrose oil, and wheat jam.
  • vegetable oils such as oil, carrot oil, kukui nut oil, grape seed oil, coconut oil, sweet almond oil, sesame oil, St. Jones wort oil, peach kernel oil, hazelnut oil, bolizi oil, and rose hip oil. Liquid paraffin is particularly preferred.
  • the amount of the active oil component containing no water in the oil-based chemical solution is 25% by mass to 75% by mass, particularly 35% by mass to 65% by mass.
  • a water-based chemical solution in the oil-based chemical solution.
  • a typical example of an aqueous chemical component is a polyol, and glycerin is particularly desirable.
  • the chemical solution contains a hygroscopic polyol such as glycerin as a main component, and among the active ingredients (components that do not substantially volatilize) excluding lignocellulosic in the product solid content, 18 to 55% by mass, particularly 22 to It is desirable to contain 55% by mass.
  • the oil-based chemical solution can contain 2.0 to 26.0% by mass of functional agents such as surfactants, oils, emulsifiers, softeners and preservatives.
  • functional agents such as surfactants, oils, emulsifiers, softeners and preservatives.
  • surfactant for example, an alkyl phosphate ester salt is preferable.
  • Liquid paraffin is preferable as the oil content. It is desirable that the surfactant and the oily component are contained in the active ingredient excluding water in an amount of 1 to 8% by mass.
  • the bundle of laminated sheets folded by the rotary interfolder is cut to a predetermined length and packaged in a packaging box as a predetermined number of bundles, or enclosed in a packaging bag made of plastic film. Can be done. In order to maintain the moisturizing property, it is desirable to use the latter plastic film packaging bag product (so-called film pack product).
  • the water-decomposable sanitary thin paper in the present invention has a water-decomposability value of 10 to 100 seconds, preferably 25 to 60 seconds.
  • the water solubility here is expressed by the number of seconds in the looseness test (test of "easy to loosen” defined by JIS P4501). If the water solubility value is less than 10 seconds, there is an increased risk that loose tissue paper will adhere to the skin when wiped off when used in the shower toilet, and if it exceeds 100 seconds, it will be flushed to the toilet. Piping is prone to clogging.
  • the paper density of each continuous thin paper is a value in the paper density measuring method of JIS P 8124.
  • the paper thickness is measured using a dial thickness gauge (thickness measuring device) "PEACOCK G type" (manufactured by Ozaki Seisakusho) under the conditions of JIS P 8111. Specifically, after confirming 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, and then set the zero point. , Raise the plunger, place the sample (for example, 1 ply of the product) on the test bench, slowly lower the plunger and read the gauge at that time. At this time, only the plunger is placed. The paper thickness is an average value obtained by performing the measurement 10 times.
  • drying strength of product The drying strength of the product (laminated product) is measured according to the tensile test method of JIS P 8113, and is measured by the number of laminated products. It shall be cut to a width of 25 mm in the vertical and horizontal directions under the standard conditions specified in JIS P 8111.
  • [Chemical solution application rate] [Chemical solution component content]
  • the chemical content is defined as the denominator (A) (g) of a tissue paper product having a predetermined mass adjusted under JIS P 8111 conditions, and the water content in the chemical solution contained in the tissue paper product having a predetermined mass is removed.
  • the mass (B) (g) is taken as a molecule, and the ratio of (B) divided by (A) is represented by (%).
  • (Chemical solution component content%) (B) ⁇ (A) x 100 (%)
  • the liquid at the application stage can be water-based.
  • the water content in the chemical solution contained in the base paper can be measured by the Karl Fischer method.
  • the viscosity of the chemical solution at the time of application is preferably 50 to 300 mPa ⁇ s. If the viscosity of the chemical solution is less than 50 mPa ⁇ s, the flexibility on the surface will be impaired. If the viscosity of the chemical solution exceeds 300 mPa ⁇ s, it is difficult for the lotion chemical solution in the sheet to permeate between the fine fibers, and a flat feeling of uniformity and touch are lost, which is not preferable.
  • the commercially available products A and B are commercially available as so-called moisturizing tissue papers, and the chemical solution application rate is high for the commercial product A and low for the commercial product A.
  • Commercial product C is general toilet paper.
  • the sanitary tissue paper obtained by the present invention can be directly applied to general toilet paper, wipe paper, etc., for example, toilet wipe, hand wipe, baby wipe, nose blow, objective wipe, body. Examples include wiping applications.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Sanitary Thin Papers (AREA)
  • Paper (AREA)

Abstract

Le problème décrit par la présente invention est d'obtenir un papier ouaté hygiénique hydrolysable qui est doux au toucher et qui présente une résistance adéquate et des propriétés d'essuyage exceptionnelles. La solution selon l'invention porte sur un papier ouaté hygiénique dans lequel trois ou quatre feuilles de papier ouaté sont stratifiées, le poids de base par feuille de produit étant de 13,5 à 19,5 g/m2, une solution chimique à base d'huile contenant 30 % en masse ou plus d'un composant huileux étant appliquée dans la quantité de 3,0 à 20,0 % en masse, et la capacité de désintégration de l'eau du produit selon la norme JIS P 4501 étant de 100 secondes ou moins.
PCT/JP2021/002401 2020-02-21 2021-01-25 Papier ouaté hygiénique et son processus de production WO2021166557A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020028427A JP7396927B2 (ja) 2020-02-21 2020-02-21 衛生薄葉紙及びその製造方法
JP2020-028427 2020-02-21

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WO2021166557A1 true WO2021166557A1 (fr) 2021-08-26

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013070954A (ja) * 2011-09-29 2013-04-22 Daio Paper Corp トイレットロールの製造方法及びトイレットロール製品

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013070954A (ja) * 2011-09-29 2013-04-22 Daio Paper Corp トイレットロールの製造方法及びトイレットロール製品

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JP2021132666A (ja) 2021-09-13

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