GB1214656A - Improvements in the production of lay flat films - Google Patents

Improvements in the production of lay flat films

Info

Publication number
GB1214656A
GB1214656A GB59021/67A GB5902167A GB1214656A GB 1214656 A GB1214656 A GB 1214656A GB 59021/67 A GB59021/67 A GB 59021/67A GB 5902167 A GB5902167 A GB 5902167A GB 1214656 A GB1214656 A GB 1214656A
Authority
GB
United Kingdom
Prior art keywords
film
tubular film
extrusion
nip rolls
tubular
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
GB59021/67A
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.)
Zellsloff Fabrik Waldhof AG
Original Assignee
Zellsloff Fabrik Waldhof 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 Zellsloff Fabrik Waldhof AG filed Critical Zellsloff Fabrik Waldhof AG
Publication of GB1214656A publication Critical patent/GB1214656A/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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/30—Making multilayered or multicoloured articles
    • B29C43/305—Making multilayered articles
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/24—Calendering
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

1,214,656. Producing integral laminated layflat films. ZELLSTOFFFABRIK WALDHOF. 29 Dec., 1967 [31 Dec., 1966], No. 59021/67. Heading B5B. Tubular films formed by the captive bubble or blown tube melt extrusion process are converted into lay-flat films by passing the tubular film (which has half the wall thickness of the lay-flat film formed therefrom) through the nip of a pair of nip rolls while the tubular film is still hot enough to be tacky only on its inner surface, whereby the tubular film is flattened and the opposing walls of the flattened tubular film are pressed together with sufficient pressure to become bonded together to form an integral laminated lay-flat film. The film may be cooled either during or after passing between the nip rolls. The nip rolls may be positioned at such an angle to the annular die through which the tubular film is extruded that when the tubular film is passed between the nip rolls any thicker longitudinal areas or "lanes" of one of the walls of the flattened tube are superimposed on "lanes" of the opposite wall of the flattened tube which are thinner than the average thickness of the film wall. The extrusion head may be rotated about the extrusion axis, the nip roll assembly being stationary, or vice versa, whereby any given point on the extruded tubular film travels in a helical path from the extrusion die towards the nip rolls. The speed of rotation of the extrusion head or of the nip roll assembly for a given linear rate of extrusion of the tubular film may be selected so that the angle between the directions of longitudinal orientation of the two walls of the tube when they are superposed is 20 to 90 degrees. The film material is preferably a polyolefin such as polyethylene or polypropylene, or polyvinyl chloride or one of its copolymers. It may be a polyamide, a polystyrene or an acrylic copolymer. The film material may be extruded at 150 to 250‹ C. depending upon its nature and the rollers may be maintained at a constant temperature of 50‹ to 90‹ C.
GB59021/67A 1966-12-31 1967-12-29 Improvements in the production of lay flat films Expired GB1214656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ0012622 1966-12-31

Publications (1)

Publication Number Publication Date
GB1214656A true GB1214656A (en) 1970-12-02

Family

ID=7622660

Family Applications (1)

Application Number Title Priority Date Filing Date
GB59021/67A Expired GB1214656A (en) 1966-12-31 1967-12-29 Improvements in the production of lay flat films

Country Status (6)

Country Link
BE (1) BE706671A (en)
DE (1) DE1629702A1 (en)
FR (1) FR1548207A (en)
GB (1) GB1214656A (en)
LU (1) LU55000A1 (en)
NL (1) NL6715042A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123973A1 (en) * 1983-04-29 1984-11-07 Feldmühle Aktiengesellschaft Multilayered sterilizable deep-drawn foil, and deep-drawn vacuum packaging to receive plastic pouches containing a perfusion solution produced thereof
EP0123974A1 (en) * 1983-04-29 1984-11-07 Helio Folien GmbH Multilayered deep-drawn foil, and deep-freeze-withstanding deep-drawn vacuum packaging
EP0333443A2 (en) * 1988-03-15 1989-09-20 W.R. Grace & Co.-Conn. Barrier stretch film
US7219484B2 (en) 2001-01-26 2007-05-22 Reckitt Benckiser (Uk) Limited Process for preparing a laminated, thermoformed film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123973A1 (en) * 1983-04-29 1984-11-07 Feldmühle Aktiengesellschaft Multilayered sterilizable deep-drawn foil, and deep-drawn vacuum packaging to receive plastic pouches containing a perfusion solution produced thereof
EP0123974A1 (en) * 1983-04-29 1984-11-07 Helio Folien GmbH Multilayered deep-drawn foil, and deep-freeze-withstanding deep-drawn vacuum packaging
EP0333443A2 (en) * 1988-03-15 1989-09-20 W.R. Grace & Co.-Conn. Barrier stretch film
EP0333443A3 (en) * 1988-03-15 1990-12-27 W.R. Grace & Co.-Conn. Barrier stretch film
US7219484B2 (en) 2001-01-26 2007-05-22 Reckitt Benckiser (Uk) Limited Process for preparing a laminated, thermoformed film

Also Published As

Publication number Publication date
BE706671A (en) 1968-04-01
LU55000A1 (en) 1968-02-27
NL6715042A (en) 1968-07-01
DE1629702A1 (en) 1971-01-28
FR1548207A (en) 1968-11-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee