GB787479A - Improvements in the manufacture of tubular film - Google Patents

Improvements in the manufacture of tubular film

Info

Publication number
GB787479A
GB787479A GB15940/55A GB1594055A GB787479A GB 787479 A GB787479 A GB 787479A GB 15940/55 A GB15940/55 A GB 15940/55A GB 1594055 A GB1594055 A GB 1594055A GB 787479 A GB787479 A GB 787479A
Authority
GB
United Kingdom
Prior art keywords
film
tubing
gas
probe
rolls
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
GB15940/55A
Inventor
Kenneth George Gerber
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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
Priority to BE548151D priority Critical patent/BE548151A/xx
Priority to NL207418D priority patent/NL207418A/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB15940/55A priority patent/GB787479A/en
Priority to US585795A priority patent/US2862234A/en
Priority to CH347638D priority patent/CH347638A/en
Priority to DEI11758A priority patent/DE1184936B/en
Priority to ES0228927A priority patent/ES228927A1/en
Publication of GB787479A publication Critical patent/GB787479A/en
Priority to GB45467/62A priority patent/GB978203A/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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/73—Processes of stretching

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

In the continuous production or treatment of tubular film, a gas is enclosed within a section of the continuously advancing film, this section being bounded at least at one by a pair of contra-rotating nip rolls which advance the film and pinch its walls firmly together, the gas being introduced through a tubular probe passing through the nip of the rolls, at least one of which is circumferentially grooved in a plane perpendicular to the axis of the roll to provide a passage for the probe, which is held substantially stationary against the rotation of the rolls while the process is in operation. Both nip rolls are preferably grooved to provide conjointly a passage for the probe, and each groove is preferably lined with a resilient substance, such as sponge rubber, to reduce the escape of the gas (usually air) from within the tubular film. The external shape of the transverse section of the probe is preferably elliptical or lenticular and the rolls are preferably correspondingly grooved. Additional tubular probes may be passed through the nip rolls, for example to provide for the withdrawal of the gas and the regulation of the pressure within the film. When two or more probes are used, these are preferably placed or joined together side by side or in a group having an approximately elliptical or lenticular overall transverse section. They may, however, be placed apart, and the nip rolls may be grooved at more than one point to receive them. The process may be used, for example, for forming a bubble of gas in extruded tubing issuing from an extrusion die (as an alternative to supplying the inflating gas through the core of the die) to stretch the tubing while it is still hot and soft; for introducing gaseous pressure into the solidified amorphous tubing to draw and orient it; to introduce gaseous pressure into the oriented tubing to prevent or control shrinkage or stretching while the tubing is heat-treated to set it in the oriented state; and for inflating the tubing to enable it to be pleated. The probe or probes may pass into the interior of the film either through the core of the tube-forming die, or at any point at which the tubular film is slit to convert it to flat film, and thence between the paired nip rolls.
GB15940/55A 1955-06-03 1955-06-03 Improvements in the manufacture of tubular film Expired GB787479A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE548151D BE548151A (en) 1955-06-03
NL207418D NL207418A (en) 1955-06-03
GB15940/55A GB787479A (en) 1955-06-03 1955-06-03 Improvements in the manufacture of tubular film
US585795A US2862234A (en) 1955-06-03 1956-05-18 Apparatus for introducing fluid pressure into continuously advancing tubular film
CH347638D CH347638A (en) 1955-06-03 1956-05-29 Process for treating tubular films, film treated by this process and device for carrying out the process
DEI11758A DE1184936B (en) 1955-06-03 1956-06-01 Device for inflating a tubular film
ES0228927A ES228927A1 (en) 1955-06-03 1956-06-02 Apparatus for introducing fluid pressure into continuously advancing tubular film
GB45467/62A GB978203A (en) 1955-06-03 1962-12-03 Improvements in or relating to the manufacture of plastic tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15940/55A GB787479A (en) 1955-06-03 1955-06-03 Improvements in the manufacture of tubular film

Publications (1)

Publication Number Publication Date
GB787479A true GB787479A (en) 1957-12-11

Family

ID=10068289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15940/55A Expired GB787479A (en) 1955-06-03 1955-06-03 Improvements in the manufacture of tubular film

Country Status (7)

Country Link
US (1) US2862234A (en)
BE (1) BE548151A (en)
CH (1) CH347638A (en)
DE (1) DE1184936B (en)
ES (1) ES228927A1 (en)
GB (1) GB787479A (en)
NL (1) NL207418A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1174488B (en) * 1961-02-14 1964-07-23 Ici Ltd Device for producing a hose from plastic
US3166616A (en) * 1961-02-14 1965-01-19 Ici Ltd Manufacture of plastic tubes
US3221084A (en) * 1959-05-26 1965-11-30 Du Pont Manufacture of polyethylene film
DE1239839B (en) * 1960-06-01 1967-05-03 Kalle Ag Process for the continuous production of biaxially stretched tubular films
CN108472872A (en) * 2016-01-05 2018-08-31 应用材料公司 The material and formula of 3 D-printing

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979777A (en) * 1958-11-06 1961-04-18 Du Pont Tubular film stretching process
US3108851A (en) * 1958-11-10 1963-10-29 Union Carbide Corp Method of biaxially stretching thermoplastic material
US3244680A (en) * 1959-10-26 1966-04-05 Monsanto Co High strength oriented ethylene/vinyl acetate copolymer film
US3157724A (en) * 1959-10-26 1964-11-17 Monsanto Co Production of high strength oriented ethylene/vinyl acetate copolymer film
GB953734A (en) * 1960-06-21
US3157720A (en) * 1960-07-13 1964-11-17 Dow Chemical Co Method and apparatus for trapped bubble stretching of thermoplastic film
US3141912A (en) * 1960-08-24 1964-07-21 Du Pont Process of treating polymeric film
GB942085A (en) * 1961-02-10 1963-11-20 Ici Ltd Improvements in or relating to thermoplastic film manufacture
GB943350A (en) * 1961-02-10 1963-12-04 Ici Ltd Improvements in or relating to thermoplastic film manufacture
NL280792A (en) * 1961-07-12
GB1050082A (en) * 1962-05-08 1900-01-01
US3187379A (en) * 1962-07-02 1965-06-08 Midland Ross Corp Forming a gelatinous solution into ribbon-like bodies
DE1205263B (en) * 1963-06-12 1965-11-18 Basf Ag Process for the production of shrinkable films from radically crosslinkable plastics
US3291876A (en) * 1964-05-05 1966-12-13 Beloit Corp Method and mechanism for biaxially orienting extruded tubular film
US3231642A (en) * 1964-07-09 1966-01-25 Du Pont Extrusion and stretching of thermoplastic film
US3466356A (en) * 1966-10-27 1969-09-09 Celanese Corp Method and apparatus for making plastic film
US3788503A (en) * 1969-12-30 1974-01-29 Kohjin Co Method for producing biaxially molecule-oriented poly-{68 -caproamide resin film
JPS6471727A (en) * 1987-09-11 1989-03-16 Idemitsu Petrochemical Co Method and device for tubular orientation of thermoplastic resin
DE19604654C2 (en) * 1996-02-09 1998-03-26 Reifenhaeuser Masch Plant for the continuous production of biaxially stretched plastic blown films and process for starting up the plant
CN110142950B (en) * 2019-04-02 2023-09-19 江阴长庚高科技材料有限公司 Film bubbling mechanism and bubbling control method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1612509A (en) * 1926-04-14 1926-12-28 Visking Corp Apparatus and method for treating sausage casings
DE655013C (en) * 1934-05-30 1938-01-13 Norddeutsche Seekabelwerke Ag Manufacture of flexible tapes, foils or tubes made of polystyrene or the like.
US2448433A (en) * 1945-09-10 1948-08-31 Dow Chemical Co Making wrinkle-free film
US2433937A (en) * 1945-10-25 1948-01-06 Modern Plastic Machinery Corp Machine for making sheets of extruded plastics
NL86373C (en) * 1948-07-14 1900-01-01
US2541064A (en) * 1948-08-11 1951-02-13 Dow Chemical Co Method of controlling the diameter and wall thickness of vinylidene chloride polymerfilm tubes
US2668323A (en) * 1951-12-12 1954-02-09 Louis Danenberg Means for treating the interior surface of tubing being extruded
US2688773A (en) * 1951-12-26 1954-09-14 Dow Chemical Co Dimensional stabilization of oriented thermoplastic films
US2763029A (en) * 1953-06-19 1956-09-18 Jr Rees E Tulloss Method of producing an optically clear polyethylene film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221084A (en) * 1959-05-26 1965-11-30 Du Pont Manufacture of polyethylene film
DE1239839B (en) * 1960-06-01 1967-05-03 Kalle Ag Process for the continuous production of biaxially stretched tubular films
DE1174488B (en) * 1961-02-14 1964-07-23 Ici Ltd Device for producing a hose from plastic
US3166616A (en) * 1961-02-14 1965-01-19 Ici Ltd Manufacture of plastic tubes
CN108472872A (en) * 2016-01-05 2018-08-31 应用材料公司 The material and formula of 3 D-printing

Also Published As

Publication number Publication date
DE1184936B (en) 1965-01-07
BE548151A (en) 1900-01-01
NL207418A (en) 1900-01-01
ES228927A1 (en) 1956-09-01
CH347638A (en) 1960-07-15
US2862234A (en) 1958-12-02

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