WO2008026673A1 - Papier mince souple - Google Patents

Papier mince souple Download PDF

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Publication number
WO2008026673A1
WO2008026673A1 PCT/JP2007/066845 JP2007066845W WO2008026673A1 WO 2008026673 A1 WO2008026673 A1 WO 2008026673A1 JP 2007066845 W JP2007066845 W JP 2007066845W WO 2008026673 A1 WO2008026673 A1 WO 2008026673A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
pulp slurry
paper
alkali treatment
softening agent
Prior art date
Application number
PCT/JP2007/066845
Other languages
English (en)
Japanese (ja)
Inventor
Tetsuya Uehara
Ayako Hirono
Hiroshi Oono
Original Assignee
Daio Paper Corporation
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 Daio Paper Corporation filed Critical Daio Paper Corporation
Publication of WO2008026673A1 publication Critical patent/WO2008026673A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to a flexible thin paper softened by internal addition of a softening agent.
  • a softening agent for household sanitary thin paper such as toilet paper and tissue paper, various methods have been proposed in which a softening agent is added to pulp slurry and the flexibility is improved by sliding between pulps.
  • softeners include fatty acid ester softeners (Patent Document 1), quaternary ammonium salt type cationic activators (Patent Document 2), urethane alcohol, salts thereof, or cationized products (Patent Document 3), non- Cationic surfactants (Patent Document 4) and the like are known.
  • Patent Document 1 U.S. Pat.No. 3,296,065
  • Patent Document 2 Japanese Patent Laid-Open No. 48-22701
  • Patent Document 3 Japanese Patent Application Laid-Open No. 60-139897
  • Patent Document 4 JP-A-2-99690
  • a main problem of the present invention is to suppress a decrease in paper strength while maintaining flexibility.
  • the present invention that has solved the above problems is as follows.
  • the pulp slurry is subjected to an alkali treatment that is held for 5 minutes to 1 hour under the conditions of ⁇ 7 ⁇ 5 to 10; and a cationic softener is added to the pulp slurry during or after the alkali treatment in a weight ratio of 0 to pulp. .;! ⁇ 3.0% by weight and add this cationic softener
  • a flexible thin paper obtained by making a paper using a pulp slurry obtained in this way.
  • a feature of the present invention is that the pulp is alkali-treated simultaneously with or prior to the addition of the softening agent.
  • the softening agent enters the fiber lumens, thereby improving the flexibility of the fiber itself.
  • the decrease in the softening agent adhering to the outer surface of the fiber is thought to be due to the suppression of slippage between the fibers that causes a decrease in paper strength.
  • Alkaline treatment time power is preferably within the range of minutes to 1 hour in terms of certainty and treatment efficiency! /. If the amount of the cationic softening agent used is too small, the bulking effect and the softening effect will be reduced.
  • Flexibility is improved by setting the temperature at which the pulp slurry is treated to 45 to 75 ° C. Strength that reduces paper strength slightly compared to when heating is not performed. Alkaline treatment is not performed at room temperature. The reason for this is not clear, but it is thought that the swelling of cellulose progressed due to heating, the elution of hemicellulose increased, and the strength decreased. On the other hand, the purity of cellulose increased and the effect of the softening agent was fully expressed. It is done. As shown in the examples, the fixing rate of the softening agent does not change greatly, but the flexibility is improved.
  • the raw material pulp known ones can be used without limitation. Specifically, mechanical pulps such as Dutchwood pulp (GP), pressure-rise groundwood pulp (PGW), thermomechanical pulp (TMP), etc. , Semi-chemical pulp (CP), high yield of softwood unbleached kraft pulp (HNKP) ⁇ softwood bleached kraft pulp (NBKP) 'hardwood unbleached kraft pulp (LUKP)' chemical pulp such as hardwood bleached kraft pulp (LBKP), and din One or two or more types of used paper pulp such as king pulp (DIP) and waste pulp (WP) can be selected and used. In particular, it is preferable that the NBKP compounding ratio (JIS P 8120) in the pulp raw material is 30.0-80.0%, especially 40.0-70.0%.
  • JIS P 8120 JIS P 8120
  • the pulp slurry obtained by suspending the pulp raw material in water is subjected to an alkali treatment for a predetermined time under an alkaline condition of ⁇ 7 ⁇ 5 to 10 to swell the pulp.
  • a more preferable range of ⁇ is 8-9. If ⁇ is too high, it becomes mercerized pulp, and the low molecular weight hemicellulose that expresses sheet strength elutes, and the crystal structure of cellulose changes from cellulose I to cellulose II and the single fiber strength of the pulp decreases. The paper strength decreases. On the other hand, if ⁇ is too low, there is little swelling of the pulp and the effect of the present invention is low
  • the treatment time for the alkali treatment is selected within a range of 5 minutes to 1 hour from the viewpoint of certainty and treatment efficiency.
  • the adjustment of ⁇ can be performed using an appropriate drug.
  • a base such as sodium hydroxide or potassium hydroxide can be used, but sodium hydroxide is preferred.
  • strong sulfuric acid that can use acids such as sulfuric acid, nitric acid, and acetic acid is preferred.
  • the temperature of the pulp slurry during the alkali treatment may be room temperature, but is preferably 45 to 75 ° C, more preferably 55 to 65 ° C.
  • the flexibility is further improved.
  • Strength that slightly reduces strength compared to the case without heating The strength is the same as when a softening agent is added without performing alkali treatment. The reason for this is that the cellulose swells due to heating, and the elution of hemicellulose increases and the strength decreases, while the purity of the cellulose increases and the effect of the softening agent is fully manifested. it is conceivable that. As shown in the examples, the fixing rate of the softening agent does not change greatly, but the softness is improved.
  • the alkali treatment can be performed in a preparation process in which pulp is beaten, 'pulp mixing', a dye or a chemical is added, a pulp slurry preparation process in a paper making process, and the like.
  • the alkali treatment may be a continuous type in which the pulp slurry is flowed, but it is preferably carried out in a batch type using a storage means such as a tank because pH adjustment and securing of the treatment time are easy. .
  • a storage means such as a tank because pH adjustment and securing of the treatment time are easy.
  • Existing equipment can also be used as the storage means.
  • a cationic softener is added to the pulp slurry during or after the alkali treatment.
  • a force S that can be appropriately selected and used, particularly fatty acid esters, fatty acid amides, and the like are suitable.
  • the amount of the cationic softener used is preferably about 0.;! To 3.0% by weight based on the pulp. If the amount of the cationic softener used is too small, the bulking effect / softening effect will be reduced.
  • the pulp slurry to which the cationic softening agent has been added is supplied to the papermaking process, and the thin paper according to the present invention is produced.
  • the paper making process is not particularly limited, and a known one can be used.
  • the basis weight of the thin paper (JIS P 8124) may be selected as appropriate, but is preferably 10.0 to 35. Og / m 2 per ply.
  • the paper strength of thin paper can be adjusted appropriately JIS
  • Dry tensile strength specified in P 8113 is 100 cN / 25 mm or more in the longitudinal direction per ply, especially 150 to 300 cN / 25 mm, 40 cN / 25 mm or more in the transverse direction, especially 60 to 100 cN / 25 mm Are preferably used. If the dry paper strength of the base paper is too low, problems such as paper breaks and elongation are likely to occur during production, and if it is too high, it will feel stiff during use.
  • a known paper strength agent can be internally or externally added.
  • dry paper strength agents are canolepoxymethylenoresenololose sodium and canolepoxymethinoresenorelose. Calcium, carboxymethylcellulose zinc and the like can be used.
  • wet paper strength agent polyamide 'epichrohydrin resin, urea resin, acid colloid'melamine resin, thermal bridging property PAM and the like can be used.
  • Pulp (LBKP: NBKP 6: 4) was suspended in water ( ⁇ 7 ⁇ 5) to produce a pulp slurry, and a handsheet having a basis weight of 42.9 g / m 2 was prepared in accordance with JIS ⁇ 8222. With respect to this handsheet, various physical properties shown in Table 1 were measured and calculated.
  • the physical properties were measured under the conditions specified in JIS P8111.
  • the fracture length was measured according to JIS P8113.
  • the Young's modulus was calculated by measuring the ultrasonic propagation velocity and substituting the measurement result into the following formula (1).
  • E is the Young's modulus
  • p is the paper density
  • C is the ultrasonic propagation velocity
  • the Young's modulus in the table is expressed as an index with the value of Comparative Example 1 being 100, and the improvement in specific volume is the value when the specific volume of Comparative Example 1 is 0%.
  • the cut length comparison value is a value when the cut length of Comparative Example 1 is 100%.
  • a hand-sheet was produced in the same manner as in Comparative Example 1 except that a cationic softening agent (T-FS301, manufactured by Starlight PMC) was added to the pulp slurry in an amount of 0.5% by weight to the pulp. Measurement / calculation was performed. In addition, the softener fixing rate was measured by the extraction method for the examples including the comparative example 2 to which the softening agent was added.
  • a cationic softening agent T-FS301, manufactured by Starlight PMC
  • Example 2 A handsheet was produced in the same manner as in Example 1 except that pH adjustment by adding NaOH was changed to pHIO, and various physical properties were measured and calculated.
  • a handsheet was produced in the same manner as in Example 3 except that the pH adjustment by adding NaOH was changed to pHIO, and various physical properties were measured and calculated. The results are shown in Table 1.
  • Pulp ( ⁇ 100%) was suspended in water ( ⁇ 7 ⁇ 5) to produce a pulp slurry.
  • softener T-FS301
  • a handsheet was prepared in the same manner as in Comparative Example 1.
  • various physical properties were measured and calculated, and the results are shown in Table 2. The Young's modulus, the increase in specific volume, and the comparative value of the tear length were calculated assuming that Comparative Example 3 was 100%.
  • a handsheet was prepared in the same manner as in Example 5 except that the pulp slurry was heated to 60 ° C during the alkali treatment.
  • various physical properties were measured and calculated in the same manner as in Example 5, and the results are shown in Table 2.
  • the present invention is applicable to thin paper such as tissue paper, toilet paper, kitchen paper, and crepe paper.

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  • Paper (AREA)

Abstract

La présente invention vise à réduire la résistance d'un papier tout en préservant sa souplesse. L'invention utilise donc un traitement alcalin pour maintenir une pulpe à un pH compris entre 7,5 et 10 pendant 5 minutes à 1 heure, et un agent d'adoucissage cationique est ajouté à la pâte à papier pendant ou après le traitement alcalin en une quantité comprise entre 0,1 et 3,0% en poids par rapport au poids de la pâte à papier. Il est possible de produire un papier mince souple en utilisant la pâte à papier produite après l'ajout de l'agent d'adoucissage cationique.
PCT/JP2007/066845 2006-08-31 2007-08-30 Papier mince souple WO2008026673A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-237017 2006-08-31
JP2006237017A JP4966612B2 (ja) 2006-08-31 2006-08-31 柔軟性薄葉紙

Publications (1)

Publication Number Publication Date
WO2008026673A1 true WO2008026673A1 (fr) 2008-03-06

Family

ID=39135955

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/066845 WO2008026673A1 (fr) 2006-08-31 2007-08-30 Papier mince souple

Country Status (2)

Country Link
JP (1) JP4966612B2 (fr)
WO (1) WO2008026673A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100595378C (zh) * 2003-12-02 2010-03-24 大王制纸株式会社 着色卫生薄纸及其制造方法
JP5570714B2 (ja) * 2008-09-30 2014-08-13 大王製紙株式会社 ペーパータオル及びペーパータオルの製造方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1077595A (ja) * 1996-09-05 1998-03-24 Mitsubishi Paper Mills Ltd 衛生用紙
WO2003018910A1 (fr) * 2001-08-31 2003-03-06 Japan Pmc Corporation Procede de collage de papier et papier colle
JP2004044058A (ja) * 2002-05-22 2004-02-12 Seiko Pmc Corp 紙用柔軟剤、それを使用した製紙方法、及び紙
JP2004084121A (ja) * 2002-08-27 2004-03-18 Seiko Pmc Corp 液体容器用原紙及びその製造方法
JP2005124884A (ja) * 2003-10-24 2005-05-19 Daio Paper Corp 家庭用衛生薄葉紙
JP2005336648A (ja) * 2004-05-26 2005-12-08 Mitsui Chemicals Inc 製紙用添加剤組成物およびそれを用いた紙
JP2006042881A (ja) * 2004-07-30 2006-02-16 Daio Paper Corp 家庭用衛生薄葉紙

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1077595A (ja) * 1996-09-05 1998-03-24 Mitsubishi Paper Mills Ltd 衛生用紙
WO2003018910A1 (fr) * 2001-08-31 2003-03-06 Japan Pmc Corporation Procede de collage de papier et papier colle
JP2004044058A (ja) * 2002-05-22 2004-02-12 Seiko Pmc Corp 紙用柔軟剤、それを使用した製紙方法、及び紙
JP2004084121A (ja) * 2002-08-27 2004-03-18 Seiko Pmc Corp 液体容器用原紙及びその製造方法
JP2005124884A (ja) * 2003-10-24 2005-05-19 Daio Paper Corp 家庭用衛生薄葉紙
JP2005336648A (ja) * 2004-05-26 2005-12-08 Mitsui Chemicals Inc 製紙用添加剤組成物およびそれを用いた紙
JP2006042881A (ja) * 2004-07-30 2006-02-16 Daio Paper Corp 家庭用衛生薄葉紙

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JP2008057084A (ja) 2008-03-13
JP4966612B2 (ja) 2012-07-04

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