WO2003042454A1 - Fibre de liant polyester pour la fabrication du papier - Google Patents

Fibre de liant polyester pour la fabrication du papier Download PDF

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Publication number
WO2003042454A1
WO2003042454A1 PCT/JP2002/011786 JP0211786W WO03042454A1 WO 2003042454 A1 WO2003042454 A1 WO 2003042454A1 JP 0211786 W JP0211786 W JP 0211786W WO 03042454 A1 WO03042454 A1 WO 03042454A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
fiber
polyester
less
polyester binder
Prior art date
Application number
PCT/JP2002/011786
Other languages
English (en)
Japanese (ja)
Inventor
Tamio Yamamoto
Nobuyuki Yamamoto
Original Assignee
Teijin Limited
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 Teijin Limited filed Critical Teijin Limited
Priority to JP2003544260A priority Critical patent/JP4031435B2/ja
Publication of WO2003042454A1 publication Critical patent/WO2003042454A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters

Definitions

  • the present invention relates to a polyester binder fiber suitable for producing a polyester fiber paper using a polyester fiber as a main fiber.
  • a core-sheath type polyester-based composite fiber in which a modified polyester having a low softening point is disposed in a sheath portion and a polyester having a normal melting point is disposed in a core portion is used as one polyester-based binder fiber.
  • a conjugate fiber requires complicated spinning equipment and advanced operation management, so that it becomes a high-cost binder fiber and cannot be used for applications requiring heat resistance.
  • Japanese Patent Publication No. 49-8809 and Japanese Patent Application Laid-Open No. 1-104883 propose the use of undrawn polyester fibers as binder fibers.
  • Japanese Unexamined Patent Publication (Kokai) No. 11-104,823 discloses, as a polyester-based binder fiber which strongly adheres to the drawn polyester fiber of the main fiber and gives a soft feeling to the obtained synthetic fiber paper, an unstretched polyester fiber.
  • the intrinsic viscosity (hereinafter referred to as intrinsic viscosity) is 0.5 to 0.58
  • the single-fiber fineness is 1.2 denier (about 1.3 dtex) or less
  • the birefringence hereinafter referred to as ⁇ ).
  • An object of the present invention is to provide a papermaking polyester binder fiber which has a small shrinkage during drying and excellent adhesiveness when producing polyester fiber paper.
  • the present inventors have found that a binder fiber which can achieve the above object can be obtained by using a polyester having a very low intrinsic viscosity and selecting proper spinning conditions.
  • the intrinsic viscosity is 0.35 to 0.49
  • the single fiber fineness is 1.5 decitex or less
  • the sheet area shrinkage defined below is 70% or less.
  • Polyester binder fibers for papermaking are proposed.
  • Sheet area shrinkage (%) ⁇ (Ao- Ai) / Ao ⁇ X I 0 0
  • AQ is the area of the sheet before shrinkage processing
  • the sheet is 80% by weight of polyester binder fiber cut to 5 mxn length and 20% by weight of NBKP. % And well mixed in water. Mix and disperse the mixture.
  • the size is about 25 cm X about 25 cm and the basis weight is about 50 gm 2 .
  • the polyester constituting the polyester binder fiber for papermaking of the present invention is 85 mol of the main repeating unit. /. Or more, preferably 9 5 mole 0/0 or a polyester comprising ethylene terephthalate tallates, or may be obtained by a small amount copolymerized terephthalic acid component and / or components other than E Ji render recall component.
  • the intrinsic viscosity of the polyester fiber of the present invention ranges from 0.35 to 0.49, preferably from 0.40 to 0.47. If the intrinsic viscosity exceeds 0.49, the shrinkage will be too high, and the strength of the obtained polyester fiber paper will be low. On the other hand, when the intrinsic viscosity is less than 0.35, spinnability deteriorates and spinning becomes extremely difficult.
  • the single fiber fineness of the polyester fiber of the present invention is 1.5 dtex or less, preferably 1.3 dtex or less. When the single fiber fineness exceeds 1.5 dtex, the strength of the obtained polyester fiber paper becomes low.
  • the lower limit of the single fiber fineness is not particularly limited, but is usually about 0.2 decitex from the viewpoint of stable spinning properties.
  • the polyester fiber of the present invention has a sheet area shrinkage ratio as defined above of 70% or less, and preferably 65% or less. If the area shrinkage exceeds 70%, the formation of the polyester fiber paper will be poor and the strength of the paper will be low.
  • the area shrinkage can be set by adjusting physical properties of the polyester fiber, such as intrinsic viscosity, ⁇ , and specific gravity, to an appropriate range. If the intrinsic viscosity of the polyester fiber is 0.35 to 0.49, to reduce the sheet area shrinkage to 70% or less, the ⁇ of the polyester fiber should be 0.012 or less, and the specific gravity should be 1.35 or less. It is preferable to adjust it.
  • the polyester fiber of the present invention can be produced by the following method. That is, pelletized polyester having an intrinsic viscosity of 0.36 to 0.51 and preferably polyethylene terephthalate is dried by an ordinary method, and then melt-spun in a spinning facility equipped with a screw-type extruder, cooled, and solidified. Take off at a rate of 700-150 OmZ.
  • the moisture content of the pellet, the drying temperature, the melt spinning temperature and the residence time of the molten polymer in the spinning machine are set and adjusted so that the intrinsic viscosity of the polyester fiber is in the range of 0.35 to 0.49. To be.
  • the spinning speed is set according to each intrinsic viscosity and discharge amount, so that the ⁇ n of the polyester fiber is 0.012 or less and the specific gravity is 1.35 or less.
  • the obtained polyester fiber is converged, and supplied to a dying machine while keeping the water content of 5 to 40% by weight, and cut into a predetermined fiber length. If the water content is lower than 5% by weight, the dispersibility of the fibers during papermaking deteriorates. If the moisture content exceeds 40% by weight, water scattering when cutting with a drum-type cutter increases, making it difficult to operate the cutter.
  • the fiber length is 2 to 20 mm, preferably 3 to 10 mm.
  • the polyester fiber produced in this manner has a small drying shrinkage in the papermaking process, has a strong adhesive force to the polyester fiber, and has excellent performance as a binder fiber for polyester fiber paper.
  • the measurement was carried out in a Ubbelohde viscosity tube at a temperature of 35 ° C using orthochlorophenol as a solvent.
  • a square sheet machine manufactured by Kumagai Riki Kogyo Co., Ltd. 80% by weight of polyester binder fiber and 20% by weight of NBKP cut to a length of 5 mm are thoroughly stirred and mixed in water to disperse. a size of about 25 CMX about 25 cm, a basis weight to create about 50 'gZm 2 sheet.
  • the sheet is placed on a perforated Teflon sheet and subjected to a relaxation shrinkage treatment in a hot air circulating drier at 140 ° C for 5 minutes.
  • the sheet area shrinkage ratio is calculated from the area ⁇ before the sheet shrinkage processing and the area ⁇ ⁇ after the sheet shrinkage processing by the following equation.
  • Sheet area shrinkage (%) ⁇ (Ao-Ai) / Ao ⁇ X I 00
  • the sample was charged into a density gradient tube (25 ° C) consisting of a mixed solvent of n-heptane and carbon tetrachloride, and the value after 6 hours was taken as the specific gravity.
  • polyester binder fiber containing water is dried in a hot air circulating drier at 120 ° C. until it is completely dried. From the weight WQ of the sample before drying and the weight of the sample after drying, it was determined by the following equation.
  • Moisture percentage (%) ⁇ (Wo-Wi) / Wi ⁇ X 100
  • the adhesiveness of the polyester binder fiber was evaluated by the strength of the polyester fiber paper.
  • the paper strength was measured by measuring the tensile strength according to JIS SP 8113, and expressed as the breaking length. The quality of the formation of the polyester fiber paper was visually determined.
  • Level 1 The distribution of the constituent fibers is uniform, and there are very few spots
  • Level 2 The distribution of the constituent fibers is slightly uneven, and the spots are slightly noticeable.
  • Level 3 The distribution of constituent fibers is very uneven, and spots are noticeable.
  • Polyethylene terephthalate pellets with different intrinsic viscosities are dried at 170 ° C, melted at 300 ° C, discharged through a mouthpiece with a hole count of 1192 at a discharge rate of 180 g / min.
  • the yarn was drawn at a spinning speed of 1150 m / min to obtain an undrawn polyethylene terephthalate fiber having a single fiber fineness of 1.3 dtex.
  • the polyethylene terephthalate fiber was made into a tow of about 200,000 decitex, and after the oil agent was applied, it was squeezed so that the water content of the toe became about 15% by weight, and cut into a length of 5 mm with a drum type cutter. An undrawn polyethylene terephthalate fiber having the properties shown in Table 1 was obtained.
  • DOO fibers 6 0 disperses the weight percent in water
  • the fiber is adjusted to a fiber concentration of 0.04% by weight and fed to a round paper machine. After papermaking, the fiber is dried with a Yankee dryer at 130 ° C and the basis weight is about 25 g. Zm 2 polyethylene terephthalate fiber paper was obtained.
  • This paper Table 1 shows the characteristics. table 1
  • polyester binder fiber of the present invention has an extremely small shrinkage during papermaking drying, it is possible to obtain a polyester fiber paper excellent in formation and firmly bonded to each other from the fiber.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)

Abstract

La présente invention se rapporte à une fibre de liant polyester pour la fabrication du papier, qui possède une viscosité intrinsèque comprise entre 0,35 et 0,49 et une finesse de fibre unique inférieure ou égale à 1,5 dtex, et présente un pourcentage de rétrécissement de la surface d'une feuille inférieur ou égal à 70 %, ce pourcentage de rétrécissement étant représenté par la formule suivante: pourcentage de rétrécissement d'une surface de feuille (%) = {(A0-A1)/A0} X 100, dans laquelle A0 est la surface d'une feuille avant le traitement de rétrécissement, A1 est la surface de la feuille après le traitement de rétrécissement. On prépare la feuille en agitant et en mélangeant 80 % en poids de fibres de liant polyester découpées en morceaux ayant une longueur de 5 mm et 20 % en poids de NBK dans de l'eau, de manière à les disperser dans l'eau, et en produisant une feuille ayant une taille de ca. 25 cm x ca . 25 cm et un grammage d'environ 50 g/m2, et on effectue le traitement de rétrécissement de manière que la feuille est séchée pendant au moins une journée à température ambiante, puis est placée sur une feuille de téflon perforée et soumise à un retrait par relaxation dans un séchoir à circulation d'air chaud, à 140 °C pendant 5 minutes.
PCT/JP2002/011786 2001-11-14 2002-11-12 Fibre de liant polyester pour la fabrication du papier WO2003042454A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003544260A JP4031435B2 (ja) 2001-11-14 2002-11-12 抄紙用ポリエステルバインダー繊維

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-348375 2001-11-14
JP2001348375 2001-11-14

Publications (1)

Publication Number Publication Date
WO2003042454A1 true WO2003042454A1 (fr) 2003-05-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/011786 WO2003042454A1 (fr) 2001-11-14 2002-11-12 Fibre de liant polyester pour la fabrication du papier

Country Status (3)

Country Link
JP (1) JP4031435B2 (fr)
TW (1) TW200300181A (fr)
WO (1) WO2003042454A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012031525A (ja) * 2010-07-28 2012-02-16 Nippon Ester Co Ltd 湿式短繊維不織布
JP2019210566A (ja) * 2018-06-04 2019-12-12 帝人フロンティア株式会社 ポリエステル系バインダー繊維

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102289067B1 (ko) * 2014-03-31 2021-08-11 주식회사 쿠라레 폴리에스테르 바인더 섬유

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043555A1 (fr) * 1980-07-07 1982-01-13 Teijin Limited Feuille en fibres de polyester ressemblant à du papier et procédé pour sa production
EP0117937A1 (fr) * 1983-02-01 1984-09-12 Teijin Limited Fibres liantes en polyester
JPH01104823A (ja) * 1987-10-16 1989-04-21 Kuraray Co Ltd ポリエステルバインダー繊維

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043555A1 (fr) * 1980-07-07 1982-01-13 Teijin Limited Feuille en fibres de polyester ressemblant à du papier et procédé pour sa production
EP0117937A1 (fr) * 1983-02-01 1984-09-12 Teijin Limited Fibres liantes en polyester
JPH01104823A (ja) * 1987-10-16 1989-04-21 Kuraray Co Ltd ポリエステルバインダー繊維

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012031525A (ja) * 2010-07-28 2012-02-16 Nippon Ester Co Ltd 湿式短繊維不織布
JP2019210566A (ja) * 2018-06-04 2019-12-12 帝人フロンティア株式会社 ポリエステル系バインダー繊維

Also Published As

Publication number Publication date
TW200300181A (en) 2003-05-16
JP4031435B2 (ja) 2008-01-09
JPWO2003042454A1 (ja) 2005-03-10

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