GB1436907A - Method of and apparatus for forming blown laminar film - Google Patents

Method of and apparatus for forming blown laminar film

Info

Publication number
GB1436907A
GB1436907A GB2844574A GB2844574A GB1436907A GB 1436907 A GB1436907 A GB 1436907A GB 2844574 A GB2844574 A GB 2844574A GB 2844574 A GB2844574 A GB 2844574A GB 1436907 A GB1436907 A GB 1436907A
Authority
GB
United Kingdom
Prior art keywords
laminar
passage
layers
stream
die
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
GB2844574A
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.)
James River Corp of Nevada
Original Assignee
Crown Zellerbach Corp
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 Crown Zellerbach Corp filed Critical Crown Zellerbach Corp
Publication of GB1436907A publication Critical patent/GB1436907A/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
    • 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
    • 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
    • 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
    • B29C48/14—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
    • B29C48/147—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle
    • B29C48/1472—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration after the die nozzle at the die nozzle exit zone
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
    • B32B38/1833—Positioning, e.g. registration or centering
    • B32B38/1841—Positioning, e.g. registration or centering during laying up
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene

Landscapes

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

Abstract

1436907 Extruding laminar tubes CROWN ZELLERBACH CORP 26 June 1974 [27 June 1973] 28445/74 Addition to 1166458 Headings B5A B5B and B5N In the formation of a laminar tubular thermoplastics film by inflation of a laminar tube 26 extruding from an annular orifice 24, the layers comprising the tube 26 are brought together as a flat rectangular stream in a die adaptor 2 from which they are discharged to the orifice 24, via an annular die passage 17 around which the stream flows in opposite directions, into an annular laminar stream having a weld line opposite the location at which the flat rectangular stream is introduced into the passage 17. The weld line is eliminated in cutting the extruded tube to form flat film. The laminar tube may be of polyethylene and polypropylene and may comprise two layers, but in the embodiment comprises an inner layer of 0À920 density polyethylene, pigmented with titanium dioxide, and outer layers of the same, but unpigmented polyethylene. The layers are each discharged from one of rectangular adaptor passages 3, 6, 6. The die comprises a bolted together assembly of parts which are replaceable by parts of different size to define extrusion passages of different size, including rings 18, 19, defining the passage 17 and a steel ring 38 which is transversely adjustable, e.g. by eight bolts 39, to regulate the flow of material around the passage 17. Inflation air is delivered through a pipe 34 and the die assembly is heated by oil circulating through passages 27, 32, or electrical resistances, and electrical resistance element 37.
GB2844574A 1973-06-27 1974-06-26 Method of and apparatus for forming blown laminar film Expired GB1436907A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37404773A 1973-06-27 1973-06-27

Publications (1)

Publication Number Publication Date
GB1436907A true GB1436907A (en) 1976-05-26

Family

ID=23475035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2844574A Expired GB1436907A (en) 1973-06-27 1974-06-26 Method of and apparatus for forming blown laminar film

Country Status (5)

Country Link
JP (1) JPS5038761A (en)
DE (1) DE2430231A1 (en)
FR (1) FR2234977B3 (en)
GB (1) GB1436907A (en)
NL (1) NL7408440A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938781A1 (en) * 1978-09-29 1980-04-03 Kureha Chemical Ind Co Ltd METHOD FOR PRODUCING TUBULAR LAYERED PRODUCTS
EP0096179A2 (en) * 1982-06-07 1983-12-21 Idemitsu Petrochemical Co. Ltd. Multi-layer extrusion die
GB2185931A (en) * 1986-01-18 1987-08-05 Reifenhaeuser Masch Extrusion die for production of co-extruded thermoplastics laminated foil tubes
EP0268695A1 (en) * 1985-07-18 1988-06-01 The Dow Chemical Company Tubular, multi-layer film and method of manufacture
AU626276B2 (en) * 1987-12-31 1992-07-30 American National Can Company Novel extrusion apparatus, methods, and related films and packages

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946128B2 (en) * 1975-03-31 1984-11-10 横河電機株式会社 variable resistance circuit
JPS6058011B2 (en) * 1975-08-12 1985-12-18 凸版印刷株式会社 Multilayer parison molding equipment for blow molding
US4042661A (en) * 1976-01-23 1977-08-16 Crown Zellerbach Corporation Method and apparatus for forming tubular multilaminate plastic film
US5143677A (en) * 1987-12-31 1992-09-01 American National Can Company Co-extrusions methods

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938781A1 (en) * 1978-09-29 1980-04-03 Kureha Chemical Ind Co Ltd METHOD FOR PRODUCING TUBULAR LAYERED PRODUCTS
US4265693A (en) 1978-09-29 1981-05-05 Kureha Kagaku Kogyo Kabushiki Kaisha Method of molding tubular laminate
EP0096179A2 (en) * 1982-06-07 1983-12-21 Idemitsu Petrochemical Co. Ltd. Multi-layer extrusion die
EP0096179A3 (en) * 1982-06-07 1985-09-25 Idemitsu Petrochemical Co. Ltd. Multi-layer extrusion die
EP0268695A1 (en) * 1985-07-18 1988-06-01 The Dow Chemical Company Tubular, multi-layer film and method of manufacture
GB2185931A (en) * 1986-01-18 1987-08-05 Reifenhaeuser Masch Extrusion die for production of co-extruded thermoplastics laminated foil tubes
GB2185931B (en) * 1986-01-18 1989-11-01 Reifenhaeuser Masch Extrusion tool for production of multilaminated foil tubes
AU626276B2 (en) * 1987-12-31 1992-07-30 American National Can Company Novel extrusion apparatus, methods, and related films and packages

Also Published As

Publication number Publication date
NL7408440A (en) 1974-12-31
DE2430231A1 (en) 1975-01-16
JPS5038761A (en) 1975-04-10
FR2234977A1 (en) 1975-01-24
FR2234977B3 (en) 1977-05-06

Similar Documents

Publication Publication Date Title
US3694292A (en) Extrusion head for producing a multilayer blown tubular film
US3223761A (en) Melt extrusion of multi-wall plastic tubing
US6190152B1 (en) Regular division of molten extrusion flow
ES461172A1 (en) Method and apparatus for the extrusion of tubular thermoplastic film
US3837773A (en) Extruded plastic film method and apparatus for the manufacture thereof
DE69013496T2 (en) Nozzle for a multi-layer element with adjustable gaps.
GB1436907A (en) Method of and apparatus for forming blown laminar film
US4281981A (en) Die assembly providing uniform pressure and flow
US3546745A (en) Extrudate sizing sleeve
US3210803A (en) Plastic tubing extrusion die air ring
GB1444107A (en) Cooling apparatus for plastic tubular film made by a blow-head
US4548570A (en) Extrusion apparatus for producing thermoplastic pipe
US3266092A (en) Balanced flow die
GB1359219A (en) Process and apparatus for the continuous production and/or covering of extruded sections
US3184792A (en) Variable orifice extrusion die
NZ218639A (en) Extruding double-walled and cored plastics pipes
US3802826A (en) Rotatable co-extrusion die
CH591322A5 (en)
US4507071A (en) Coextrusion apparatus for producing multiple layered thermoplastic pipe
US3475789A (en) Blown film dies
US3606636A (en) Extrusion die
JPH0513816B2 (en)
GB1252174A (en)
US3890083A (en) Extrusion devices
US3193879A (en) Extrusion device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]