GB924501A - Process for the orientation of tubular films - Google Patents

Process for the orientation of tubular films

Info

Publication number
GB924501A
GB924501A GB25757/59A GB2575759A GB924501A GB 924501 A GB924501 A GB 924501A GB 25757/59 A GB25757/59 A GB 25757/59A GB 2575759 A GB2575759 A GB 2575759A GB 924501 A GB924501 A GB 924501A
Authority
GB
United Kingdom
Prior art keywords
duct
film
air
heated
gas
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
GB25757/59A
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.)
JP Bemberg AG
Bemberg AG
Original Assignee
JP Bemberg AG
Bemberg 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 JP Bemberg AG, Bemberg AG filed Critical JP Bemberg AG
Publication of GB924501A publication Critical patent/GB924501A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

A tubular film of a thermoplastic polymeric material made by extrusion of a melt through an annular nozzle 2 followed by inflation with air or other gas, is conveyed through a first duct 4 at a temperature of from 5 DEG to 20 DEG C. below the softening point of the film but above its second order transition temperature, the pressure in the first duct corresponding to the internal pressure of the air or other gas in the tubular film, and the hardened and substantially amorphous film is then passed into a highly polished pipe 7 heated to substantially the same temperature, the diameter of the pipe being equal to the diameter of the tubular film, and is then guided into a second heated duct 8 in which <PICT:0924501/IV(a)/1> the pressure is lower than that in the first duct, and wound up by rollers (not shown) rotating at such a speed as to effect longitudinal stretching of the film. In the apparatus shown hot air is supplied to duct 4 via inlet 5, escaping through outlet 6, while the tube is inflated with air or other gas via 3. The duct 8 is heated with radially-arranged infra-red heaters 9. Specified materials include polyethylene, polyamides, polyesters, polyvinyl chloride and polyvinylidene chloride.
GB25757/59A 1958-08-02 1959-07-27 Process for the orientation of tubular films Expired GB924501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB49839A DE1194560B (en) 1958-08-02 1958-08-02 Method and device for stretching blown films in longitudinal and transverse directions

Publications (1)

Publication Number Publication Date
GB924501A true GB924501A (en) 1963-04-24

Family

ID=6968995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25757/59A Expired GB924501A (en) 1958-08-02 1959-07-27 Process for the orientation of tubular films

Country Status (3)

Country Link
CH (1) CH369590A (en)
DE (1) DE1194560B (en)
GB (1) GB924501A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363035A (en) * 1964-12-16 1968-01-09 Seikisui Chemical Co Ltd Process for stretching tubular molded articles of thermoplastic resin

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1504805B1 (en) * 1965-08-30 1970-12-10 Rehau Plastics Gmbh Method and device for the continuous production of a shrink tube

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB781879A (en) * 1954-08-11 1957-08-28 Ici Ltd Improvements in and relating to the manufacture of films

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363035A (en) * 1964-12-16 1968-01-09 Seikisui Chemical Co Ltd Process for stretching tubular molded articles of thermoplastic resin

Also Published As

Publication number Publication date
CH369590A (en) 1963-05-31
DE1194560B (en) 1965-06-10

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