DE1161679B - Process for the production of a sealable composite film - Google Patents
Process for the production of a sealable composite filmInfo
- Publication number
- DE1161679B DE1161679B DEA35368A DEA0035368A DE1161679B DE 1161679 B DE1161679 B DE 1161679B DE A35368 A DEA35368 A DE A35368A DE A0035368 A DEA0035368 A DE A0035368A DE 1161679 B DE1161679 B DE 1161679B
- Authority
- DE
- Germany
- Prior art keywords
- melt flow
- polymers
- composite film
- film
- sealable
- 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.)
- Pending
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
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- 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
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Description
Verfahren zur Herstellung einer siegelfähigen Verbundfolie Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer siegelfähigen Verbundfolie, bestehend aus mindestens zwei im plastischen Zustand verbindbaren Einzelfolien aus kristallinen Hoch polymeren, von denen eine gereckt ist.Process for producing a sealable composite film The invention relates to a process for the production of a sealable composite film, consisting of at least two individual foils that can be connected in the plastic state crystalline high polymers, one of which is stretched.
Verbundfolien dieser Art sind bekannt. Composite films of this type are known.
Es ist ferner bekannt, daß Filme und Folien aus kristallinen Polymeren, wie z. B. aus Polyvinylidenchlorid, Polypropylen u. a., durch biaxiales Recken wesentlich an Klarheit und Festigkeit gewinnen. It is also known that films and sheets made of crystalline polymers, such as Of polyvinylidene chloride, polypropylene and others, by biaxial stretching gain in clarity and firmness.
Beim Schweißen derartiger Filme geht die Reckorientierung der Moleküle in der Schweißnaht und damit die günstigen mechanischen Eigenschaften verloren. Zugleich schrumpft die Folie an der erwärmten Schweißstelle, so daß die Schweißnaht orientierter Folien wellig und unansehnlich wird.When welding such films, the stretching orientation of the molecules goes in the weld seam and thus the favorable mechanical properties are lost. At the same time, the film shrinks at the heated weld point, so that the weld seam oriented films become wavy and unsightly.
Um die guten Eigenschaften reckorientierter Folien beim Heißsiegeln zu erhalten, ist es üblich geworden sie mit einem heißsiegelfähigen Anstrich von Kunststofflösungen oder Emulsionen zu versehen. Beim Heißsiegeln schmilzt dann nur der aufgetragene Film, der aus einem Kunststoff besteht, der erheblich unter der Schmelztemperatur der doppelt orientierten Folie schmilzt. About the good properties of stretch-oriented films for heat sealing It has become common practice to apply a heat sealable coat of paint to them To provide plastic solutions or emulsions. When it is heat-sealed, it only melts the applied film, which consists of a plastic that is considerably below the Melting temperature of the double-oriented film melts.
Bei der Auswahl des heißsiegelfähigen Anstriches besteht die Schwierigkeit, gute Verbindung mit der doppelt orientierten Folie zu bekommen. Die Haftfestigkeit der Schweißnaht kann keinesfalls größer sein als die Haftung des Anstriches auf der Folie. When choosing the heat-sealable paint, there is the difficulty to get a good connection with the double-oriented film. The adhesive strength the weld seam can in no way be greater than the adhesion of the paint on the slide.
Vorliegende Erfindung löst das Problem der guten Heißsiegelfähigkeit bei einer Verbundfolie der eingangs geschilderten Gattung. Das Verfahren zur Herstellung einer solchen Verbundfolie ist erfindungsgemäß dadurch gekennzeichnet, daß man mindestens zwei im Schmelzfluß einen innigen Verband eingehende Polymere von verschiedenem Erweichungspunkt im Schmelzfluß vereinigt und anschließend bei einer Temperatur unterhalb des Schmelzpunktes des bei höherer Temperatur schmelzenden Polymers gemeinsam in einer oder zwei Richtungen reckt. The present invention solves the problem of good heat sealability in the case of a composite film of the type described above. The method of manufacture such a composite film is characterized according to the invention in that at least two polymers of different nature forming an intimate bond in the melt flow Softening point combined in the melt flow and then at one temperature below the melting point of the polymer melting at a higher temperature together stretches in one or two directions.
Beispiele solcher Kombinationen von Polymeren sind (wobei das reckorientierbare höher schmelzende Polymer an den Anfang gestellt ist mit dem zugehörigen Erweichungspunkt) folgende: Niederdruck-Polyäthylen (1350C) - Hochdruck-Polyäthylen (llO bis 115°C); Mischpolymerisat von Vinylidenchlorid (etwa 750/0) mit Vinylchlorid (etwa 250/0) (135"C)-Mischpolymerisat von Vinylidenchlorid 600/0 mit Vinylchlorid 400/0 (120"C); Polyamid vom Schmelzpunkt rund 210"C - Polyamid vom Schmelzpunkt 185"C; isotaktisches Polypropylen (l650C) - Polyäthylen (125°C). Examples of such combinations of polymers are (where the stretch-orientable higher melting polymer is placed at the beginning with the associated softening point) the following: low-pressure polyethylene (1350C) - high-pressure polyethylene (110 to 115 ° C); Copolymer of vinylidene chloride (about 750/0) with vinyl chloride (about 250/0) (135 "C) copolymer of vinylidene chloride 600/0 with vinyl chloride 400/0 (120" C); Polyamide with a melting point of around 210 "C - polyamide with a melting point of 185" C; isotactic Polypropylene (l650C) - polyethylene (125 ° C).
Die beiden Folienarten können gleich dick sein, indes wird bevorzugt die Folie mit niedrigerem Schmelzpunkt dünn gehalten und die nach der Reckorientierung Festigkeit gebende Folie entsprechend dicker. The two types of film can be of the same thickness, but is preferred the film with the lower melting point is kept thin and that after the stretching orientation Strength-giving film is correspondingly thicker.
Die Doublierung im Schmelzfluß kann auf den verschiedensten Maschinen erfolgen, so etwa mit übereinandergestellten Breitschlitzdüsen oder Breitschlitzdüsen mit doppelter Materialanspeisung, am Kalander mit doppelseitiger Materialzulührung zu einem gemeinsamen Walzenspalt oder etwa nach dem Blasfolienverfahren zur Herstellung von Mehrfachfolien. The doubling in the melt flow can be done on a wide variety of machines take place, for example with slot nozzles or slot nozzles placed one above the other with double material feed, on the calender with double-sided material feed to a common nip or, for example, according to the blown film process for production of multiple foils.
Man reckorientiert derartig doublierte Folien entweder nur in der Längs- oder besser in Längs- und Querrichtung, gegebenenfalls gleichzeitig in beiden Richtungen, entweder unmittelbar hinter der Doublierung bei einer nur um wenige Grad unter der Erweichungstemperatur der höher schmelzenden Folie liegenden Temperatur oder nach dem Abkühlen bei Zimmertemperatur oder schließlich nach nochmaligem Aufheizen auf eine optimale Recktemperatur. Das günstigste Verfahren richtet sich nach der Art der zu reckenden Kunststoffe. Such laminated foils are stretch-oriented either only in the Longitudinally or better in longitudinal and transverse directions, possibly simultaneously in both Directions, either immediately behind the liner with one only by a few Degrees below the softening temperature of the higher-melting film or after cooling down at room temperature or finally after heating up again to an optimal stretching temperature. The cheapest method depends on the Type of plastics to be stretched.
Derartige, in einer oder zwei Richtungen gereckte Doublierfolien können nun, je nach dem Kunststoff, entweder mit Hochfrequenz oder allein mit Hitze verschweißt werden, derart, daß die festigkeitstragende Folie mit höherem Schmelzpunkt beim Schweißvorgang unter Schmelztemperatur bleibt, während die niedriger schmelzende, meist dünnere Folienschicht die Schweißverbindung herstellt, wobei selbstverständlich die beiden Seiten mit niedrigerem Schmelzpunkt aufeinanderliegen müssen. Die Haftverbindung und Schweißfestigkeit ist höher als bei den heute üblichen Verfahren, da die Verbindung zwischen den beiden Kunststoffarten bei der Herstellung im Schmelzfluß intensiver ist als bei allen anderen Kaschierverfahren. Such doubling foils stretched in one or two directions can now, depending on the plastic, either with high frequency or with heat alone be welded in such a way that the strength-supporting film with a higher melting point remains below the melting temperature during the welding process, while the lower melting point, usually thinner film layer produces the welded connection, of course the two sides with lower Melting point lie on top of each other have to. The adhesive bond and weld strength is higher than the usual ones today Process as the connection between the two types of plastic during manufacture is more intense in the melt flow than in any other lamination process.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA35368A DE1161679B (en) | 1960-08-17 | 1960-08-17 | Process for the production of a sealable composite film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA35368A DE1161679B (en) | 1960-08-17 | 1960-08-17 | Process for the production of a sealable composite film |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1161679B true DE1161679B (en) | 1964-01-23 |
Family
ID=6929002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA35368A Pending DE1161679B (en) | 1960-08-17 | 1960-08-17 | Process for the production of a sealable composite film |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1161679B (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2015777A1 (en) * | 1970-04-02 | 1971-10-21 | The Dow Chemical Company, Midland, Mich. (V.St.A.) | Food pack for autoclaves |
DE1786278A1 (en) * | 1967-09-21 | 1972-02-17 | Dow Chemical Co | Packaging film and packaging |
DE1629360A1 (en) * | 1965-07-01 | 1972-02-24 | Dow Chemical Co | Packaging film and process for its production |
DE2445227A1 (en) * | 1974-09-21 | 1976-04-08 | Focke Pfuhl Verpack Automat | Laminated packaging sheet - with film section directed towards welding tool having higher melting temperature than tool temperature |
EP0008623A1 (en) * | 1978-07-05 | 1980-03-19 | Toray Industries, Inc. | Biaxially oriented polypropylene film laminate and its use |
DE3047285A1 (en) * | 1979-12-21 | 1981-09-10 | Mitsubishi Gas Chemical Co., Inc., Tokyo | BAG WITH AN SEALED OXYGEN ABSORPTION AGENT |
DE3041286C1 (en) * | 1980-11-03 | 1982-07-22 | Hoechst Ag, 6000 Frankfurt | Sealable, biaxially stretched polypropylene film with high scratch resistance and process for its production |
DE3626809A1 (en) * | 1986-06-06 | 1987-12-10 | Auch Folien Gmbh | Biaxially oriented polypropylene film - includes gas barrier and sealing layers, for packaging foodstuffs |
FR2603522A1 (en) * | 1986-09-08 | 1988-03-11 | Silec Liaisons Elec | FLEXIBLE TUBE WITH REDUCED LINEAR EXPANSION COEFFICIENT, MANUFACTURING METHOD THEREOF, AND APPARATUS USING THE SAME |
EP0516302A1 (en) * | 1991-05-15 | 1992-12-02 | Transpak Industries Limited | A plastics material |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT200331B (en) * | 1955-05-25 | 1958-10-25 | Rasmussen O B | Multi-layer film |
-
1960
- 1960-08-17 DE DEA35368A patent/DE1161679B/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT200331B (en) * | 1955-05-25 | 1958-10-25 | Rasmussen O B | Multi-layer film |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1629360A1 (en) * | 1965-07-01 | 1972-02-24 | Dow Chemical Co | Packaging film and process for its production |
DE1786278A1 (en) * | 1967-09-21 | 1972-02-17 | Dow Chemical Co | Packaging film and packaging |
DE2015777A1 (en) * | 1970-04-02 | 1971-10-21 | The Dow Chemical Company, Midland, Mich. (V.St.A.) | Food pack for autoclaves |
DE2445227A1 (en) * | 1974-09-21 | 1976-04-08 | Focke Pfuhl Verpack Automat | Laminated packaging sheet - with film section directed towards welding tool having higher melting temperature than tool temperature |
EP0008623A1 (en) * | 1978-07-05 | 1980-03-19 | Toray Industries, Inc. | Biaxially oriented polypropylene film laminate and its use |
DE3047285A1 (en) * | 1979-12-21 | 1981-09-10 | Mitsubishi Gas Chemical Co., Inc., Tokyo | BAG WITH AN SEALED OXYGEN ABSORPTION AGENT |
DE3041286C1 (en) * | 1980-11-03 | 1982-07-22 | Hoechst Ag, 6000 Frankfurt | Sealable, biaxially stretched polypropylene film with high scratch resistance and process for its production |
DE3626809A1 (en) * | 1986-06-06 | 1987-12-10 | Auch Folien Gmbh | Biaxially oriented polypropylene film - includes gas barrier and sealing layers, for packaging foodstuffs |
FR2603522A1 (en) * | 1986-09-08 | 1988-03-11 | Silec Liaisons Elec | FLEXIBLE TUBE WITH REDUCED LINEAR EXPANSION COEFFICIENT, MANUFACTURING METHOD THEREOF, AND APPARATUS USING THE SAME |
EP0263728A1 (en) * | 1986-09-08 | 1988-04-13 | Societe Industrielle De Liaisons Electriques - Silec | Hose with a reduced linear expansion coefficient, its manufacturing process and apparatus for using it |
EP0516302A1 (en) * | 1991-05-15 | 1992-12-02 | Transpak Industries Limited | A plastics material |
US5250343A (en) * | 1991-05-15 | 1993-10-05 | Transpak Industries Limited | Plastics material |
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