EP0071084B1 - Appareil pour la fabrication de fibres liantes à partir de dispersions de polymères - Google Patents

Appareil pour la fabrication de fibres liantes à partir de dispersions de polymères Download PDF

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Publication number
EP0071084B1
EP0071084B1 EP82106300A EP82106300A EP0071084B1 EP 0071084 B1 EP0071084 B1 EP 0071084B1 EP 82106300 A EP82106300 A EP 82106300A EP 82106300 A EP82106300 A EP 82106300A EP 0071084 B1 EP0071084 B1 EP 0071084B1
Authority
EP
European Patent Office
Prior art keywords
funnel
chamber
precipitant
fibers
stirrer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82106300A
Other languages
German (de)
English (en)
Other versions
EP0071084A1 (fr
Inventor
Richard Dr. Bung
Karl Gans
Gerold Schreyer
Gerhard Dr. Welzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to AT82106300T priority Critical patent/ATE6875T1/de
Publication of EP0071084A1 publication Critical patent/EP0071084A1/fr
Application granted granted Critical
Publication of EP0071084B1 publication Critical patent/EP0071084B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/40—Formation of filaments, threads, or the like by applying a shearing force to a dispersion or solution of filament formable polymers, e.g. by stirring

Definitions

  • the present invention relates to a device for the production of binding fibers, in particular for the production of nonwovens by the wet process with agents for bringing together polymer dispersions which contain anionic or nonionic dispersants and aqueous solutions containing cationic precipitants which cause fiber formation of precipitated polymer particles.
  • anionic polymer dispersions can be processed into longer binding fibers if the dispersions are added in a thin jet to an aqueous cationic polymer solution, which causes fibrous precipitation of the polymer particles.
  • the anionic dispersed polymers used must be those whose glass transition temperatures are between + 25 ° C and -52 ° C.
  • these conditions lead to very short fibers or better fibrils, the length of which is specified in Example 1 of the last-mentioned publication with a maximum of 500 ⁇ m.
  • the polymer dispersion is injected under pressure in a thin jet through narrow nozzles into the moderately stirred precipitation bath, the polymer having to have a certain glass transition temperature (Tg).
  • Tg glass transition temperature
  • fibrils are obtained by precipitation in a shear field which is generated by nozzles and in which the individual jets had a speed of at least 5 m / s.
  • DE-A-2516 561 describes precipitation in a shear field with an average energy density of at least 5 W.s / cm3.
  • the object of the present invention was to find a device which allows polymer dispersions of various chemical origins to be easily formed both into fibrils and into thin fibers which are at least 1 millimeter long and are suitable as binding fibers for the consolidation of nonwoven fabrics to process. Smaller binding fibers can get into the filtrate during dewatering, become deposited in the water cycle and lead to malfunctions. In addition, they are lost as binders for the fleece.
  • a discharge space is preferably connected downstream of the homogenization space.
  • binding fibers or fibrils with a length of 1 to 6 mm and more can be produced in the laminar-flowing precipitation bath with low shear springs.
  • a stirrer 7 and the precipitating agent flowing in through a metering device 10 generate a drum 3 in the feed hopper 4 and a rotating precipitation bath in the homogenization chamber 8.
  • the polymer dispersion is introduced in a thin stream from a container with a downstream nozzle 1.
  • the resulting dispersion thread 2 travels downward in a spiral in the drum 3.
  • the surface of the thread becomes closed by coagulation of the thread-like dispersion at least partially fixed.
  • the coagulated dispersion thread is swirled into binding fibers or fibrils in a swirl chamber 5 and in the annular gap 6.
  • the fibers or fibrils formed are fixed by final coagulation and transported into a drainage space 9.
  • the pressure in the nozzle 1 and the width of the annular gap 6 fibers with different lengths, possibly fibrils, arise with more or less strong ramifications on the surface and the ends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Artificial Filaments (AREA)

Claims (2)

1. Appareil de fabrication de fibres de liaison, en particulier pour la fabrication de nappes de fibres selon le procédé par voie humide, avec des moyens de réunion de dispersions de polymères, qui contiennent un dispersant anionique ou non anionique, et de solutions aqueuses, contenant un précipitant dissous, qui provoquent une formation de fibres de particules de polymères précipitées, caractérisé par la combinaison des caractéristiques suivantes:
a) une buse (1) pour l'introduction de la dispersion de polymères dans une trémie d'alimentation (4), ainsi qu'un moyen de dosage (10) pour le précipitant, qui sont agencés de façon qu'en coopération avec un agitateur (7), une trombe (3) soit produite, dans la trémie d'alimentation (4)
b) une chambre de turbulence (5), située entre l'agitateur (7) et la trémie d'alimentation (4), qui, par un interstice annulaire (6), débouche dans une enceinte d'homogénéisation (8).
2. Appareil selon la revendication 1, caractérisé par le fait qu'à l'enceinte d'homogénéisation (8) fait suite une enceinte d'évacuation (9).
EP82106300A 1981-07-22 1982-07-14 Appareil pour la fabrication de fibres liantes à partir de dispersions de polymères Expired EP0071084B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106300T ATE6875T1 (de) 1981-07-22 1982-07-14 Vorrichtung zur herstellung von bindefasern aus polymerisatdispersionen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813128873 DE3128873A1 (de) 1981-07-22 1981-07-22 Vorrichtung zur herstellung von bindefasern aus polymersatdispersionen
DE3128873 1981-07-22

Publications (2)

Publication Number Publication Date
EP0071084A1 EP0071084A1 (fr) 1983-02-09
EP0071084B1 true EP0071084B1 (fr) 1984-03-28

Family

ID=6137426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106300A Expired EP0071084B1 (fr) 1981-07-22 1982-07-14 Appareil pour la fabrication de fibres liantes à partir de dispersions de polymères

Country Status (5)

Country Link
US (1) US4534720A (fr)
EP (1) EP0071084B1 (fr)
JP (1) JPS5823912A (fr)
AT (1) ATE6875T1 (fr)
DE (2) DE3128873A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3905009A1 (de) * 1989-02-18 1990-08-23 Basf Ag Verfahren zur herstellung von fibrillen aus offenzelligen schaeumen
JP2009512792A (ja) * 2005-10-20 2009-03-26 ダウ ライヒホールド スペシャルティ ラテックス，エルエルシー 複合革材料
CN111763996B (zh) * 2020-07-17 2023-08-29 中国科学技术大学 基于动态界面挤出的可编码水凝胶微纤维制备装置及方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385916A (en) * 1965-11-03 1968-05-28 Du Pont Process for producing microporous polyurethane fibrids
NL133246C (fr) * 1967-04-28
US3766002A (en) * 1970-12-02 1973-10-16 Nat Starch Chem Corp Nonwoven products
US4211737A (en) * 1974-11-19 1980-07-08 Montedison S.P.A. Process for producing synthetic fibers for use in paper-making

Also Published As

Publication number Publication date
DE3128873A1 (de) 1983-02-10
ATE6875T1 (de) 1984-04-15
JPS5823912A (ja) 1983-02-12
EP0071084A1 (fr) 1983-02-09
US4534720A (en) 1985-08-13
DE3260084D1 (en) 1984-05-03

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