EP0267489A2 - Procédé et dispositif pour appliquer et imprégner une étoffe de nappe de fibres avec des liquides visqueux - Google Patents

Procédé et dispositif pour appliquer et imprégner une étoffe de nappe de fibres avec des liquides visqueux Download PDF

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Publication number
EP0267489A2
EP0267489A2 EP87115755A EP87115755A EP0267489A2 EP 0267489 A2 EP0267489 A2 EP 0267489A2 EP 87115755 A EP87115755 A EP 87115755A EP 87115755 A EP87115755 A EP 87115755A EP 0267489 A2 EP0267489 A2 EP 0267489A2
Authority
EP
European Patent Office
Prior art keywords
viscose
nozzle
nozzles
coating
web side
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.)
Granted
Application number
EP87115755A
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German (de)
English (en)
Other versions
EP0267489B1 (fr
EP0267489A3 (en
Inventor
Klaus Dipl.-Ing. Basfeld
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
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 Wolff Walsrode AG filed Critical Wolff Walsrode AG
Publication of EP0267489A2 publication Critical patent/EP0267489A2/fr
Publication of EP0267489A3 publication Critical patent/EP0267489A3/de
Application granted granted Critical
Publication of EP0267489B1 publication Critical patent/EP0267489B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/08—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating from outlets being in, or almost in, contact with the textile material

Definitions

  • the invention relates to a method and a device for applying and impregnating nonwovens with viscous liquids.
  • Nonwoven fabric is to be understood in particular to mean a structure of an irregular structure in which there is a cavity structure distributed unevenly over the surface.
  • Such nonwovens can have natural as well as artificially produced fibers as base material, which are additionally stabilized by cross-linking.
  • Such structures are difficult to soak, especially if the embedding process is to take place very quickly and without the inclusion of air or gas.
  • Such a production stage exists, for example, in the production of fiber-reinforced cellulose casings, which are preferably made from a nonwoven web and viscose.
  • Cellulose casings are e.g. used in the packaging of food, in particular they are used as sausage casings. A distinction is made between one-sided and two-sided viscous casings depending on the type of viscose applied during manufacture.
  • the form which is viscose-coated on both sides, generally has better and more uniform embedding of the nonwoven fabric, provided that air pockets can be avoided on both sides of the nonwoven in the short time of applying the viscose. It is understandable that the targeted air displacement is easier to carry out with a one-sided coating, especially since after leaving the nozzle in which the coating is applied, there is still a free distance until the beginning of the precipitation, the one-sided displacement of the air from the fleece.
  • the cellulose casings in tubular form which are viscose on both sides and are customary today are generally produced by first forming a nonwoven web into a tubular. Viscose is applied to this tube from both sides in the coating device (GB 1336850). The viscose is applied almost simultaneously for reasons of the decreasing strength in the viscose wetting of the natural fiber fleece that is usually preferred. For this, nozzle systems are used, which consist of an outer and an inner ring nozzle. The viscose is pre-pressurized via these ring nozzles given amounts applied. The impregnation of the fleece without the inclusion of air is difficult because it is a highly viscous aqueous liquid.
  • the viscosity of the viscose is essentially determined by the solids content of cellulose and the degree of polymerization. The higher the two values, the higher the viscosity. For the processing of the viscose, one would like a low viscosity in order to quickly and optimally soak the nonwoven fabric. However, the quality of the end product increases with a high solids content and degree of polymerization. The degree of polymerization determines the shrinkage behavior and the elasticity of the regenerated cellulose, the solids content the porosity and in connection with the degree of polymerization the final strength of the shell. This results in a compromise for the production, which is usually a solids content that is actually too low.
  • viscose with 6.5 to 7% by weight is used, i.e. a solids content that is not optimal.
  • the object of the present invention was to provide an improved device and an improved method, in particular for coating on both sides of nonwovens.
  • the invention relates to a device for applying and soaking in particular on both sides Nonwovens with a viscous liquid with preferably at least one application nozzle on each web side of the nonwoven, characterized in that on at least one web side A at least 2 nozzles D1 and D3 are arranged offset in the conveying direction.
  • a nozzle D2 for the counter-coating preferably between the nozzles D1 and D3, is arranged on the web side I opposite the web side A.
  • the web side A is the outer web side of the nonwoven.
  • the nozzles are preferably annular slot nozzles whose outlet opening has a width of 0.3 to 6 mm.
  • the nozzles D1 and D3 are preferably offset from one another by approximately 2 mm to 8 mm.
  • the invention further relates to a method for applying and impregnating nonwovens in particular on both sides with a viscous liquid, preferably with at least one nozzle for each web side of the nonwoven, at least 2 nozzles D1 and D3 applying the viscous liquid on at least one web side A.
  • Nozzle D3 is arranged offset in the conveying direction to nozzle D1; the fleece is thus coated first through the nozzle D1 and then only through the nozzle D3.
  • the counter-coating of the web side I is preferably carried out with a nozzle D2, which is preferably located opposite the nozzle lip common to the nozzles D1 and D3.
  • the application to any area takes place through the nozzle D2 approx.
  • the viscous liquid emerges from the nozzle D3 at a higher pressure than from the nozzle D1.
  • the outlet pressure from the nozzle is regulated in such a way that the nonwoven web to be coated moves through the staggered pressure build-up in the direction of the outlet of the coating device.
  • the solids content of the viscous liquid is preferably 7.5 to 9.0% by weight.
  • the viscous liquid may contain additives that improve the appearance and properties, e.g. Color pigments, adhesives or release agents, as well as substances that regulate the adhesive and reactive properties.
  • the manufacturing process for a cellulose casing according to the invention preferably proceeds as follows:
  • the web cut from nonwoven depending on the viscose tube diameter to be produced is formed into a tube with an overlap.
  • the hose in this case is preferably impregnated and coated on both sides with viscose. After passing through an air gap the viscose-coated nonwoven tube into a precipitation bath, where the viscose is precipitated, while maintaining regenerated cellulose. The regenerated cellulose is then washed, passed through a plasticizer bath and dried under supporting air.
  • the amount of water to be evaporated depends on the level of the solid content of cellulose in the viscose. Higher solids content means lower water content, which is another reason to be able to process high solids contents via the nozzle.
  • the coating according to the invention is preferably carried out in a cascade fashion, starting with an outer coating via an annular nozzle.
  • the distribution of the outer viscose systematically increases the pressure on the nonwoven, and the full pressure load is only reached when the coating device passes through at the end of the annular gap that exists between the nozzle bodies inside and outside to guide the nonwoven web.
  • the nonwoven is floated through the viscose and transported through the nozzle combination with an outflowing viscose without significant frictional stress.
  • the increase in pressure on the nonwoven fabric is optimized by the viscose distribution so that a draft-free structure of the viscose goods is achieved even with thin nonwoven fabrics.
  • the viscous process takes place in the device according to FIG. 1.
  • the nonwoven fabric formed into a tube runs over a cylindrical calibration mandrel 3.
  • the tube runs between an outer nozzle combination 1 and the assigned inner nozzle 2.
  • the outer combination consists of two individual nozzles 5 and 6.
  • the viscose is guided via a pump and inlet 7, not shown, into the annular chamber 9 of the nozzle 5, which is dimensioned such that a pressure loss to be neglected during Distributing the viscose occurs.
  • the viscose which is under pressure flows through a narrow nozzle gap 10 onto the nonwoven fabric.
  • the procedure for the second outer nozzle 6 via inlet 8, annular chamber 11 and nozzle gap 12 is similar. Viscoses with different properties can be fed in via inlet 7 and 8.
  • the inner nozzle 2 is fed via a viscose feed, not shown.
  • the viscose passes through the collecting space 15 into the nozzle gap 16, from there under pressure on the nonwoven fabric 4.
  • the nonwoven fabric 4 initially runs along the outer nozzle lip 18 and is exposed to viscose via the nozzle gap 10.
  • the pressure is generally such that the viscose does not rise in the 17 A annular gap.
  • the high viscosity leaves ventilation channels free.
  • the inner nozzle lip 21 ends under the nozzle gap 10 for optimal fleece support.
  • the pre-coated fleece runs into the pressure zone between nozzle lips 19 and 20.
  • the viscose flows over the nozzle ring gap 12. Since the highest pressure drop exists along the outer nozzle lip 20, the viscose is forced to exit via the annular gap 17 E. It moves the sensitive, now viscose-damped nonwoven fabric towards the nozzle outlet without stressing the nonwoven fabric.
  • the system of double loading from the outside and single coating via the inner nozzle described in the example is sufficient to build up the cascade-shaped viscose load with the wedge effect of the viscose pressure build-up.
  • the double action is preferably on the outside because these nozzles are more easily accessible for the viscose feed; it could of course also be inside.
  • the number of ring nozzles inside or outside can be an even or odd number.
  • a viscose produced according to customary methods is applied to a nonwoven fabric made of natural fibers with 21 g / m2 paper basis weight and 322 mm cutting width with the following data.
  • the viscosity of this viscose is 410 falling seconds at 20 ° C.
  • This viscose can only be processed to a limited extent with the usual viscous system at a production speed of 750 m / h. Sufficient soaking is not achieved in the overlap area of the seam; there are air pockets. There is a strong unevenness in the distribution of viscose on the nonwoven fabric due to excessive tensile forces or frictional forces in the nozzle. The finished product shows strongly fluctuating pressures.
  • Example 1 is repeated, but the viscose was applied according to the invention with a device according to FIG. 1.
  • the application speed was 750 m / h.
  • composition of the finished hose was: 18.1 g / m cellulose 31% by weight of glycerin based on cellulose 7% by weight of water
  • the cellulose tube was pressed open with water. It burst at overpressure of 0.69 bar.
  • the nonwoven embedding showed no air pockets.
  • the subsequent painting could be carried out better on the particularly flat surface than was the case with goods made with low-viscosity viscose and the usual nozzle system.
  • Example 2 is repeated with a cellulose casing made of non-woven fabric with 17 g / m2 paper basis weight and 200 mm cutting width. The same good results are obtained.
  • the cylindrical calibration mandrel 3 forms the support of the fleece tube until the viscose coating is finished.
  • About the A viscose is applied in accordance with Example 1 to nozzle D1. It additionally contains a coloring.
  • the same viscose is applied via nozzle D3.
  • a fiber fleece with a cutting width of 206 mm and a paper weight of 21 g / m2 is coated at a speed of 800 m / h. Total fleece embedding is achieved with perfect seam penetration. The regenerated cellulose layer is even without color streaks.
  • the viscosification is carried out with the substances and the same processing speed as in Example 4.
  • a conventional nozzle is used which has only one annular gap pressurized with viscose, through which the viscose reaches the nonwoven fabric.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Reinforced Plastic Materials (AREA)
EP87115755A 1986-11-08 1987-10-27 Procédé et dispositif pour appliquer et imprégner une étoffe de nappe de fibres avec des liquides visqueux Expired - Lifetime EP0267489B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863638189 DE3638189A1 (de) 1986-11-08 1986-11-08 Verfahren und vorrichtung zum auftragen und durchtraenken von vliesstoffen mit viskosen fluessigkeiten
DE3638189 1986-11-08

Publications (3)

Publication Number Publication Date
EP0267489A2 true EP0267489A2 (fr) 1988-05-18
EP0267489A3 EP0267489A3 (en) 1989-11-02
EP0267489B1 EP0267489B1 (fr) 1992-12-02

Family

ID=6313526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115755A Expired - Lifetime EP0267489B1 (fr) 1986-11-08 1987-10-27 Procédé et dispositif pour appliquer et imprégner une étoffe de nappe de fibres avec des liquides visqueux

Country Status (5)

Country Link
US (1) US4808439A (fr)
EP (1) EP0267489B1 (fr)
JP (1) JP2563115B2 (fr)
DE (2) DE3638189A1 (fr)
FI (1) FI91783C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353609A2 (fr) * 1988-08-05 1990-02-07 Hoechst Aktiengesellschaft Gaine tubulaire d'emballage à base de cellulose à structure textile
WO1996014752A1 (fr) * 1994-11-14 1996-05-23 Wolff Walsrode Ag Procede de production de tuyaux souples en viscose par precipitation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407616A (en) * 1991-12-19 1995-04-18 E. I. Du Pont De Nemours And Company Method for making cylindrical preforms
US5514417A (en) * 1994-08-04 1996-05-07 Schuller International, Inc. Method of and apparatus for coating a molded fibrous workpiece

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224885A (en) * 1961-10-10 1965-12-21 Union Carbide Corp Method of producing cellulosic sausage casings
FR2130462A1 (en) * 1971-03-23 1972-11-03 Knez Miran Textile reinforced plastic article - formed by preimpregnating textile before introduction into fabric
US3709720A (en) * 1969-12-27 1973-01-09 E Kindl Process and apparatus for coating a tube of fiber material with viscose by extrusion
FR2423320A1 (fr) * 1978-04-17 1979-11-16 Asahi Dow Ltd Structure perfectionnee de matiere a mouler
US4221756A (en) * 1978-09-15 1980-09-09 Western Electric Company, Incorporated Methods of enclosing a plurality of conductors in a partitioned jacket
EP0037661A2 (fr) * 1980-04-07 1981-10-14 Teepak, Inc. Méthode et filière d'extrusion pour revêtir une enveloppe fibreuse
JPS57194739A (en) * 1981-05-22 1982-11-30 Toho Cellophane Kk Production of fibrous casing
FR2577466A1 (fr) * 1985-02-21 1986-08-22 Ashimori Ind Co Ltd Materiau tubulaire de revetement a base de resines synthetiques, procede et appareil de fabrication
US4681722A (en) * 1985-10-07 1987-07-21 Owens-Corning Fiberglas Corporation Method of making a lineal structural member

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2365079A1 (de) * 1973-12-28 1975-07-03 Hoechst Ag Verfahren und vorrichtung zum impraegnieren oder beschichten von textilmaterialien
JPS584954U (ja) * 1981-07-01 1983-01-13 シャープ株式会社 やぐらこたつ

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3224885A (en) * 1961-10-10 1965-12-21 Union Carbide Corp Method of producing cellulosic sausage casings
US3709720A (en) * 1969-12-27 1973-01-09 E Kindl Process and apparatus for coating a tube of fiber material with viscose by extrusion
FR2130462A1 (en) * 1971-03-23 1972-11-03 Knez Miran Textile reinforced plastic article - formed by preimpregnating textile before introduction into fabric
FR2423320A1 (fr) * 1978-04-17 1979-11-16 Asahi Dow Ltd Structure perfectionnee de matiere a mouler
US4221756A (en) * 1978-09-15 1980-09-09 Western Electric Company, Incorporated Methods of enclosing a plurality of conductors in a partitioned jacket
EP0037661A2 (fr) * 1980-04-07 1981-10-14 Teepak, Inc. Méthode et filière d'extrusion pour revêtir une enveloppe fibreuse
JPS57194739A (en) * 1981-05-22 1982-11-30 Toho Cellophane Kk Production of fibrous casing
FR2577466A1 (fr) * 1985-02-21 1986-08-22 Ashimori Ind Co Ltd Materiau tubulaire de revetement a base de resines synthetiques, procede et appareil de fabrication
US4681722A (en) * 1985-10-07 1987-07-21 Owens-Corning Fiberglas Corporation Method of making a lineal structural member

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAPANESE PATENT GAZETTE, Sektion CH, Woche 8302, Klass A, Nr. 83-03549k/02, Derwent Publications Ltd, London, GB; & JP-A-57 194 739 (TOHO CELLOPHANE) 30-11-1982 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0353609A2 (fr) * 1988-08-05 1990-02-07 Hoechst Aktiengesellschaft Gaine tubulaire d'emballage à base de cellulose à structure textile
EP0353609B1 (fr) * 1988-08-05 1994-03-02 Hoechst Aktiengesellschaft Gaine tubulaire d'emballage à base de cellulose à structure textile
WO1996014752A1 (fr) * 1994-11-14 1996-05-23 Wolff Walsrode Ag Procede de production de tuyaux souples en viscose par precipitation

Also Published As

Publication number Publication date
US4808439A (en) 1989-02-28
FI91783B (fi) 1994-04-29
EP0267489B1 (fr) 1992-12-02
FI874894A (fi) 1988-05-09
DE3782918D1 (de) 1993-01-14
DE3638189A1 (de) 1988-05-11
EP0267489A3 (en) 1989-11-02
FI91783C (fi) 1994-08-10
FI874894A0 (fi) 1987-11-05
JPS63126959A (ja) 1988-05-30
JP2563115B2 (ja) 1996-12-11

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