GB304754A - Process of and apparatus for manufacturing seamless flexible tubes from cellulose solutions, particularly viscose - Google Patents

Process of and apparatus for manufacturing seamless flexible tubes from cellulose solutions, particularly viscose

Info

Publication number
GB304754A
GB304754A GB36174/28A GB3617428A GB304754A GB 304754 A GB304754 A GB 304754A GB 36174/28 A GB36174/28 A GB 36174/28A GB 3617428 A GB3617428 A GB 3617428A GB 304754 A GB304754 A GB 304754A
Authority
GB
United Kingdom
Prior art keywords
tube
precipitant
liquid
interior
bath
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
GB36174/28A
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 and Co 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 and Co AG filed Critical Wolff and Co AG
Publication of GB304754A publication Critical patent/GB304754A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)

Abstract

304,754. Wolff & Co., and Weingand, R. Jan. 26, 1928, [Convention date]. Apparatus for making films.-Seamless flexible tubes of any desired length are prepared from cellulose solutions particularly viscose by allowing the cellulose solution to issue solely by its own weight and without the aid of extraneously applied pressure from an annular nozzle, directly into a. coagulating bath, whilst a precipitant liquid is introduced at the same time inside the nozzle and the tubular layer issuing therefrom. The spent portion of the precipitant inside the flexible tube is continuously removed by a syphon tube and suction device, the level of liquid inside the tube being preferably maintained at the same level as or somewhat higher than that of the external coagulating bath. In the form of apparatus shown in the Figure, the cellulose solution, such as viscose, flows solely by its own weight direct from the annular nozzle 1 into the precipitating bath 2 as a cylindrical layer 3. The tube 4, which serves to admit the precipitated liquid into the interior of the flexible tube 3 in course of formation, is provided with a regulating valve 5 and projecting through the nozzle 1, which may dip slightly into the precipitation bath. The spent portion of the precipitant liquid is continuously carried off through the syphon 6, which dips at one end only a short distance below the surface of the interior precipitant liquid and at the other end dips into the precipitation bath 2, from which the spent precipitant can be run off through the overflow 7. The supply of the precipitant liquid to the interior of the tube can be regulated by the valve 5, so that its renewal always keeps pace with the consumption, the rate of which depends upon the character of the cellulose solution, the working speed and the dimensions of the flexible tube. Uniformity of the flexible tube is maintained by the equality of pressure continuously maintained between the exterior and interior precipitant liquid by the syphon 6 and the tendency of the tube to contract may be counteracted by a positive pressure generated, for example, by adjusting the interior precipitant to a higher level than that of the exterior precipitation bath. A heavy longitudinal tension can be applied to the tube during formation in order to control the thickness of the tube and the whole process can be carried out in a continuous manner up to the drying stage by transferring the tube by means of rollers 8 and 9 from the bath 2 for further treatment in the usual washing, bleaching, desulphurizing, dyeing and plasticizing baths.
GB36174/28A 1928-01-26 1928-12-07 Process of and apparatus for manufacturing seamless flexible tubes from cellulose solutions, particularly viscose Expired GB304754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE304754X 1928-01-26

Publications (1)

Publication Number Publication Date
GB304754A true GB304754A (en) 1930-02-13

Family

ID=6119406

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36174/28A Expired GB304754A (en) 1928-01-26 1928-12-07 Process of and apparatus for manufacturing seamless flexible tubes from cellulose solutions, particularly viscose

Country Status (1)

Country Link
GB (1) GB304754A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899076A1 (en) * 1997-08-27 1999-03-03 Kalle Nalo GmbH & Co. KG Process and apparatus for producing a seamless cellulose-based tubular film by extrusion
EP1174243A1 (en) * 2000-07-22 2002-01-23 Kalle GmbH & Co. KG Process and apparatus for manufacturing a seamless tubular film and seamless tubular film

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899076A1 (en) * 1997-08-27 1999-03-03 Kalle Nalo GmbH & Co. KG Process and apparatus for producing a seamless cellulose-based tubular film by extrusion
US6033618A (en) * 1997-08-27 2000-03-07 Kalle Nalo Gmbh & Co. Kg Process and apparatus for producing a seamless cellulose-based tubular film by extrusion
EP1174243A1 (en) * 2000-07-22 2002-01-23 Kalle GmbH & Co. KG Process and apparatus for manufacturing a seamless tubular film and seamless tubular film
US6821591B2 (en) 2000-07-22 2004-11-23 Kalle Gmbh & Co. Kg Seamless tubular film and methods and devices for producing a seamless tubular film materials

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