GB1305826A - - Google Patents
Info
- Publication number
- GB1305826A GB1305826A GB2236670A GB2236670A GB1305826A GB 1305826 A GB1305826 A GB 1305826A GB 2236670 A GB2236670 A GB 2236670A GB 2236670 A GB2236670 A GB 2236670A GB 1305826 A GB1305826 A GB 1305826A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layers
- passageway
- cooling passageway
- extrusion
- coolant
- 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
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
- B29C48/25—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
- B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
-
- 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
- B29C48/03—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
- B29C48/14—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
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
1305826 Partially oriented laminated films; extruding multi-layered sheets MULTIFOL PATENTVERWERTUNGS AG 8 May 1970 [9 May 1969] 22366/70 Headings B5A and B5B In a process for making a partially oriented multi-layer plastic film or sheet a plurality of plastic layers are led to meet in an extrusion head adapted for the extrusion of laminated films or sheets, and then immediately subjected to an orienting treatment, the process comprising co-extruding at least three layers of thermoplasticized polymeric material, the middle layer having a relatively high melting temperature, and the two outer layers having a relatively low melting temperature, leading the joined layers during a predetermined period of time through a cooling passageway of annular crosssection, said outer layers being in contact with the inner and outer walls of said cooling passageway, said predetermined period of time and the cooling action of said cooling passageway being such as to cool down the middle layer below its melting temperature, but, however, to maintain the outer layers of the joined layers above their melting temperature when arriving at the outlet of said cooling passageway, and stretching the extruded laminated film or sheet in the longitudinal and/or the transverse direction, so as to orient said middle layer, the friction between the outer layers of the joined layers in said cooling passageway and the walls of the passageway being sufficient so as to prevent the joined layers as appearing at the outlet of the cooling passageway from being torn from the joined layers as appearing in a section upwards of said outlet, in which latter section all layers are still in a condition above their melting temperatures. The extruded laminated film or sheet may be stretched in the extrusion direction; the film may however be extruded as a laminated tubular film or sheet which is then stretched transversely by inflation. In either case the effect of the stretching is to orient the solidified middle layer while the outer layers being still molten, do not become oriented on stretching. The middle layer of the laminated film may be a polyamide layer and the outer layers may be polyolefin layers or ionomer resin layers. The polyolefin may be a terpolymer of ethylene acrylic acid, and an ester of acrylic acid such as methyl or ethyl acrylate. As shown in Fig. 1, an extrusion head 10 adapted for the extrusion of tubular three layer laminated films according to the invention is provided with three passageways 12, 14 and 16 of annular cross-section. Passageways 12 and 16 are fed with molten polyethylene from screw extruders 20 and 28 respectively, while simultaneously passageway 14 is fed with molten polyamide from screw extruder 24. At 30 the three passageways 12, 14 and 16 converge and open into a main passageway 32 of annular cross-section. An extension 34 is attached to the extrusion head 10 but separated therefrom by a layer of insulation 36. A cooling passageway 38 within the head extension 34 constitutes a continuation of the passageway. 32 and is cooled by coolant ducts 40, 42 and 44 of annular cross-section. The coolant duct 40 cools the inner wall of the cooling passageway 38 and communicates through lines 54, 56 extending through the core of the extrusion head 10 with a coolant source. The cooling passageway 38 is cooled from the outside by the coolant ducts 42, 44 communicating through coolant lines 46, 48 and 50, 52 respectively with a coolant source. The tubular laminated film extruded from the extrusion head 10 is stretched longitudinally by a pair of draw rolls and transversely by inflation in the usual manner.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691923852 DE1923852C (en) | 1969-05-09 | Method and device for producing a partially stretched plastic film material |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1305826A true GB1305826A (en) | 1973-02-07 |
Family
ID=5733790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2236670A Expired GB1305826A (en) | 1969-05-09 | 1970-05-08 |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS535339B1 (en) |
BE (1) | BE750152A (en) |
BR (1) | BR7018889D0 (en) |
CA (1) | CA941113A (en) |
CH (1) | CH507085A (en) |
ES (1) | ES379505A1 (en) |
FR (1) | FR2042531B1 (en) |
GB (1) | GB1305826A (en) |
NL (1) | NL168441C (en) |
SE (1) | SE364215B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0096179A2 (en) * | 1982-06-07 | 1983-12-21 | Idemitsu Petrochemical Co. Ltd. | Multi-layer extrusion die |
GB2397212B (en) * | 2001-11-29 | 2005-12-07 | Isp Investments Inc | Process and equipment for making simulated olive products by coextrusion, and obtainable product |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2629789A1 (en) * | 1976-07-02 | 1978-01-05 | Demag Kunststofftech | BLOW HEAD FOR THE PRODUCTION OF TUBE FILMS IN THE EXTRUSION PROCESS |
DE3211833C2 (en) * | 1982-03-31 | 1985-09-26 | Reifenhäuser GmbH & Co Maschinenfabrik, 5210 Troisdorf | Blow head for the production of a plastic blown film by laying a blown film tube flat |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1044068A (en) * | 1962-10-24 | 1966-09-28 | Union Carbide Corp | Production of coated biaxially oriented linear highly crystalline polyolefin films |
-
1970
- 1970-05-04 CH CH665670A patent/CH507085A/en not_active IP Right Cessation
- 1970-05-06 SE SE06247/70A patent/SE364215B/xx unknown
- 1970-05-08 GB GB2236670A patent/GB1305826A/en not_active Expired
- 1970-05-08 NL NLAANVRAGE7006743,A patent/NL168441C/en not_active IP Right Cessation
- 1970-05-08 CA CA082,302A patent/CA941113A/en not_active Expired
- 1970-05-08 BR BR218889/70A patent/BR7018889D0/en unknown
- 1970-05-08 BE BE750152D patent/BE750152A/en unknown
- 1970-05-08 FR FR707016916A patent/FR2042531B1/fr not_active Expired
- 1970-05-09 ES ES379505A patent/ES379505A1/en not_active Expired
- 1970-05-09 JP JP3965670A patent/JPS535339B1/ja active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
GB2397212B (en) * | 2001-11-29 | 2005-12-07 | Isp Investments Inc | Process and equipment for making simulated olive products by coextrusion, and obtainable product |
US7550171B2 (en) | 2001-11-29 | 2009-06-23 | Fmc Corporation | Process and equipment for making simulated olive products by coextrusion, and obtainable product |
Also Published As
Publication number | Publication date |
---|---|
DE1923852A1 (en) | 1970-12-17 |
BR7018889D0 (en) | 1973-02-22 |
NL7006743A (en) | 1970-11-11 |
BE750152A (en) | 1970-10-16 |
SE364215B (en) | 1974-02-18 |
NL168441B (en) | 1981-11-16 |
ES379505A1 (en) | 1973-04-01 |
CA941113A (en) | 1974-02-05 |
FR2042531B1 (en) | 1974-07-12 |
CH507085A (en) | 1971-05-15 |
JPS535339B1 (en) | 1978-02-25 |
DE1923852B2 (en) | 1972-12-28 |
FR2042531A1 (en) | 1971-02-12 |
NL168441C (en) | 1982-04-16 |
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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 |