EP0218934B1 - Procédé de nettoyage de boyaux synthétiques en cellulose régénérée - Google Patents

Procédé de nettoyage de boyaux synthétiques en cellulose régénérée Download PDF

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Publication number
EP0218934B1
EP0218934B1 EP86112752A EP86112752A EP0218934B1 EP 0218934 B1 EP0218934 B1 EP 0218934B1 EP 86112752 A EP86112752 A EP 86112752A EP 86112752 A EP86112752 A EP 86112752A EP 0218934 B1 EP0218934 B1 EP 0218934B1
Authority
EP
European Patent Office
Prior art keywords
washing
regenerated cellulose
cellulose
artificial
elements
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 - Lifetime
Application number
EP86112752A
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German (de)
English (en)
Other versions
EP0218934A3 (en
EP0218934A2 (fr
Inventor
Hans-Gert Kirchner
Bernd Dr. Wahle
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.)
Dow Produktions und Vertriebs GmbH and Co oHG
Original Assignee
Wolff Walsrode AG
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Filing date
Publication date
Application filed by Wolff Walsrode AG filed Critical Wolff Walsrode AG
Publication of EP0218934A2 publication Critical patent/EP0218934A2/fr
Publication of EP0218934A3 publication Critical patent/EP0218934A3/de
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Publication of EP0218934B1 publication Critical patent/EP0218934B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
    • D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
    • D06L1/20—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents combined with mechanical means

Definitions

  • the invention relates to a method for faster cleaning of synthetic casings from regenerated cellulose, in which the product to be cleaned passes through several washing segments, where it is first expressed with the aid of squeezing elements and then washed out via deflection elements with the washing medium flowing in countercurrent.
  • regenerated cellulose products are either in a vertical arrangement (vertical wash), in which the up and down continuous material webs are sprayed with water at the top, with salt and acid-laden water flowing out at the lower deflection points or in horizontal wash baths (tub washing), which often are arranged one above the other in several floors, washed out with water in countercurrent.
  • vertical wash in which the up and down continuous material webs are sprayed with water at the top, with salt and acid-laden water flowing out at the lower deflection points or in horizontal wash baths (tub washing), which often are arranged one above the other in several floors, washed out with water in countercurrent.
  • the aim of the present invention was therefore to provide a more efficient washout process for artificial casings from regenerated cellulose products in order to ultimately increase the production speed.
  • the invention relates to a method for cleaning synthetic casings from regenerated cellulose, characterized in that the synthetic intestine is guided through several washing segments, where it is first of all used with a squeezing element made of an upper hard and a lower rubber-coated roller at line pressures of 1 to 1000 N per cm squeezed out and then washed out with deflecting elements using the countercurrent wash water, while dwell times between successive squeezing elements are set to less than 10 seconds.
  • each of these washing segments (6) is equipped with a squeezing element (1), the line pressure of which can be adjusted using the usual methods (hydraulics, spring pressure, etc.).
  • the squeezing element should consist of a pair of rollers, e.g. a combination of an upper roller made of stainless steel and a lower roller with a hard rubber coating of medium shore hardness.
  • Each washing segment (6) has at least one deflecting element (2), preferably a deflecting roller, the residence time of the product to be washed out being increased with the number of deflecting elements.
  • the washing water (7) is conducted in counterflow to the direction of the product (3) to be washed out. In the case of a common container for the individual washing segments, this is ensured by flow guide plates (5).
  • the squeezing elements (1) can also be equipped with fresh water nozzles (4) on the inlet side, which flush away the heavily salt-laden water escaping during squeezing, some of which runs off on the product (3).
  • the dwell time between successive squeezing elements should be set so that the absorbent product reaches a high swelling state by absorbing fresh water.
  • the dwell time can be controlled by the machine speed, but also by the number of deflecting elements, preferably deflecting rollers, and the dimension of the washing segments.
  • the suction speed of the material is known to be influenced by the temperature of the wash water. Line pressure from 100 to 500 N per cm are preferred. Due to the high absorbency, relatively short dwell times of less than 10 seconds can be sufficient to achieve the maximum possible water absorption.
  • the cleaning method according to the invention makes it possible to achieve washing-out degrees which are superior to those of the prior art, with a considerable reduction in the size of the system, water and energy. It is also possible to significantly increase the production speed.
  • cellulose tubes are cleaned, which are known to be produced by coating a fiber paper formed into a tube with viscose and subsequent coagulation and regeneration in a precipitation bath with a high salt and acid content.
  • the washing segments used in the examples each have three deflection rollers, a base area of 50 ⁇ 50 cm and a height of 75 cm, measured between the lower deflection roller and squeeze rollers.
  • the synthetic intestine emerging from the pre-cleaning trough made of regenerated cellulose with a load of 0.5 to 0.7 g salt per g cellulose is pressed off with the first squeezing rollers at a line pressure of 120 N / cm and passes through at a speed of 7.5 m / min five washing segments with a total washing distance of 12.5 m.
  • the water temperature is 40 ° C, the throughput 25 1 / min.
  • the artificial intestine has a residual salt content of on average ⁇ 0.001 g of salt per g of cellulose, determined as the residue that can still be removed with water.
  • Example 1 an artificial intestine made from regenerated cellulose with a salt load of 0.8 to 1 g salt per g cellulose is cleaned in five washing segments at a speed of 10 m / min.
  • the residual salt content after cleaning is 0.002 g salt per g cellulose.
  • an artificial intestine made from regenerated cellulose is cleaned, the water throughput being increased to 60 l / min.
  • the residual salt content averages 0.0015 g salt per g cellulose.
  • Example 3 an intestine with a salt load of 1.2 to 1.4 g of salt per g of cellulose is cleaned at a speed of 15 m / min in seven washing segments, corresponding to a total washing distance of 17.5 m.
  • the average residual salt content is 0.0025 g of salt per g of artificial casing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Paper (AREA)
  • Artificial Filaments (AREA)

Claims (2)

1. Procédé pour nettoyer des boyaux artificiels en cellulose régénérée, procédé caractérisé en ce qu'on fait passer le boyau artificiel par plusieurs segments de lavage où il subit tout d'abord, à des pressions linéaires de 1 à 1 000 N par cm, une expression réalisée à l'aide d'un élément d'expression constitué par un cylindre supérieur dur et un cylindre inférieur revêtu de gomme, puis, avec renvoi simultané sur des éléments de renvoi ou de changement de direction, le boyau est extrait par lavage à l'aide d'une eau de lavage circulant à contre-courant, les temps de séjour entre les éléments successifs d'expression étant réglés à une valeur inférieure à 10 s.
2. Procédé selon la revendication 1, caractérisé en ce qu'on utilise, comme élément de renvoi ou de changement de direction, des rouleaux de renvoi ou de changement de direction.
EP86112752A 1985-10-12 1986-09-16 Procédé de nettoyage de boyaux synthétiques en cellulose régénérée Expired - Lifetime EP0218934B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3536537 1985-10-12
DE19853536537 DE3536537A1 (de) 1985-10-12 1985-10-12 Verfahren zur reinigung von produkten aus regenerierter cellulose

Publications (3)

Publication Number Publication Date
EP0218934A2 EP0218934A2 (fr) 1987-04-22
EP0218934A3 EP0218934A3 (en) 1988-09-14
EP0218934B1 true EP0218934B1 (fr) 1990-03-21

Family

ID=6283497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112752A Expired - Lifetime EP0218934B1 (fr) 1985-10-12 1986-09-16 Procédé de nettoyage de boyaux synthétiques en cellulose régénérée

Country Status (4)

Country Link
US (1) US4790044A (fr)
EP (1) EP0218934B1 (fr)
DE (2) DE3536537A1 (fr)
FI (1) FI864079A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5741529A (en) 1996-07-31 1998-04-21 Alfacel S.A. Adjustable reaction tubs for cellulose
US5736087A (en) * 1996-10-30 1998-04-07 Alfacel S.A. Method for finishing of sausage casings
AT406588B (de) * 1998-09-29 2000-06-26 Chemiefaser Lenzing Ag Verfahren zur herstellung cellulosischer fasern
CN114539800B (zh) * 2022-04-01 2023-08-04 浙江理工大学 一种高韧性高透明可热封纤维素膜的制备方法及应用

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916767A (en) * 1956-12-07 1959-12-15 Du Pont Film casting apparatus including means to restrain transverse shrinkage of the film
US3857261A (en) * 1973-08-27 1974-12-31 Riggs & Lombard Inc Textile scouring range
DE2425374A1 (de) * 1974-05-25 1975-12-04 Artos Meier Windhorst Kg Verfahren und vorrichtung zur nassbehandlung, insbesondere zum waschen von laufenden warenbahnen
US4025304A (en) * 1974-09-14 1977-05-24 Vepa Ag Process for the wet treatment of tension-free guided material
US3889390A (en) * 1974-10-18 1975-06-17 Du Pont Regenerated cellulose softener recovery method and apparatus
US3972209A (en) * 1974-11-18 1976-08-03 Serkov Arkadij T Apparatus for washing yarn during movement thereof
FR2317410A1 (fr) * 1975-07-11 1977-02-04 Evsei Moiseevich Mogilevsky Procede de lavage, au cours de leur deplacement continu, de fils de viscose fraichement formes et dispositif pour la mise en oeuvre dudit procede
JPS5274094A (en) * 1975-12-15 1977-06-21 Toyo Boseki Correct apparatus for loop size of fibre in continuous treat machine
US4372135A (en) * 1979-05-11 1983-02-08 Greenville Steel Textile Machinery Corporation Horizontal washer apparatus
US4520520A (en) * 1983-02-01 1985-06-04 Johnston Lawton L Mercerization process and apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Kurt Götze :"Chemiefasern nach dem Viskoseverfahren",2.Band,3.Aufl.,Springer Verlag (1967),S.881 bis 885 und 910 bis 913 *

Also Published As

Publication number Publication date
DE3669741D1 (de) 1990-04-26
FI864079A (fi) 1987-04-13
EP0218934A3 (en) 1988-09-14
EP0218934A2 (fr) 1987-04-22
US4790044A (en) 1988-12-13
FI864079A0 (fi) 1986-10-09
DE3536537A1 (de) 1987-04-16

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