DE1247607B - Process for producing a tubular film - Google Patents
Process for producing a tubular filmInfo
- Publication number
- DE1247607B DE1247607B DEP28749A DEP0028749A DE1247607B DE 1247607 B DE1247607 B DE 1247607B DE P28749 A DEP28749 A DE P28749A DE P0028749 A DEP0028749 A DE P0028749A DE 1247607 B DE1247607 B DE 1247607B
- Authority
- DE
- Germany
- Prior art keywords
- film
- speed
- cooling
- cooler
- hose
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow 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
- B29C48/001—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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
Description
Nummer: 1 247 607Number: 1 247 607
Aktenzeichen: P 28749 X/39 a3File number: P 28749 X / 39 a3
1 247 607 Anmeldetag: 6.Februar 19621 247 607 Filing date: February 6, 1962
Auslegetag: 17. August 1967Opened on: August 17, 1967
Die Erfindung betrifft ein Verfahren zur Herstellung einer Schlauchfolie, bei welchem ein Gemisch aus einem Äthylenpolymerisat mit einer Dichte von etwa 0,956 bis 0,960 g/cm3 und einem etwa 20 bis 40% des Gesamtgewichtes des Gemisches betragenden Elastomeren aus der Schmelze zum Schlauch ausgepreßt und der Schlauch durch Einführen eines gasförmigen Mediums ausgedehnt und anschließend über einen Kühler geführt wird.The invention relates to a method for producing a tubular film in which a mixture of an ethylene polymer with a density of about 0.956 to 0.960 g / cm 3 and an elastomer amounting to about 20 to 40% of the total weight of the mixture is pressed from the melt to form the tube and the Hose is expanded by introducing a gaseous medium and then passed through a cooler.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu schaffen, durch welches Schlauchfolien hergestellt werden, die aus einem Gemisch aus einem Äthylenpolymerisat und einem Elastomeren bestehen und eine ausreichende Schlagzähigkeit aufweisen, so daß sich das Material zur Herstellung von Beuteln und Säcken bei hoher Arbeitsgeschwindigkeit eignet.The invention is based on the object of creating a method by which tubular films are made, which consist of a mixture of an ethylene polymer and an elastomer and have sufficient impact strength so that the material for making bags and sacks at high working speed.
Zur Lösung dieser Aufgabe ist das Verfahren erfindungsgemäß dadurch gekennzeichnet, daß die Abkühlung des Schlauches am Kristallisationspunkt des Schlauchmaterials, an dem die Schlauchtemperatur etwa IOO0C beträgt, mit einer Geschwindigkeit erfolgt, die größer als 100°C/Sek. ist.To achieve this object the method according to the invention is characterized in that the cooling of the hose at the focal point of the tube material to which the tube temperature is about IOO 0 C, takes place at a speed which is greater than 100 ° C / sec. is.
Der Kristallisationspunkt läßt sich leicht als derjenige Punkt ermitteln, an welchem der ausgepreßte Schlauch zuerst undurchsichtig wird (man bezeichnet diese Stelle auch als »Frost Line«). Quantitativ kann die laitische Zone als die Zone definiert werden, in welcher die Temperatur des Schlauches auf 90 bis IlO0C sinkt.The crystallization point can easily be determined as the point at which the squeezed tube first becomes opaque (this point is also known as the "frost line"). Quantitatively, the laitische zone can be defined as the zone in which the temperature of the tube to Ilo is lowered to 90 0 C.
Als Äthylenpolymerisate können die linearen Polyäthylene und Mischpolymerisate des Äthylens mit einer kleineren Menge eines !-Olefins eingesetzt werden. Diese Polymerisate und Mischpolymerisate sind stark kristallin und durch Polymerisation des Monomeren an verschiedenen Katalysatoren, z. B. Chromoxyd mit Siliciumdioxyd-Aluminiumoxyd, Gemischen von Titantetrachlorid mit Äthylaluminiumhalogeniden u. dgl., erhältlich. Das Äthylen kann auch mit einem ldeineren Anteil eines Comonomeren, vorzugsweise Buten-1, mischpolymerisiert sein, wobei die Produkte mit einer Dichte im unteren Teil des Dichtebereichs besonders geeignet sind.The linear polyethylenes and copolymers of ethylene can be used as ethylene polymers can be used with a smaller amount of an! -olefin. These polymers and copolymers are highly crystalline and by polymerization of the monomer over various catalysts, e.g. B. Chromium oxide with silicon dioxide-aluminum oxide, mixtures of titanium tetrachloride with ethyl aluminum halides and the like. The ethylene can also be mixed with a smaller portion of a comonomer, preferably butene-1, be copolymerized, the products having a density in the lower part of the Density range are particularly suitable.
Das Elastomere kann ein Polymerisat natürlicher oder künstlicher Herlcunft sein. Diese Polymerisate zeichnen sich dadurch aus, elastisch und dehnbar zu sein und sich nach Wegfall der Dehnkräfte wieder zusammenzuziehen. Zu solchen Elastomeren gehören der Naturkautschuk wie auch Polymerisate und Mischpolymerisate des Isobutylens, Butadiens, Isoprens, Chloroprene, Isopentens, Isooctens, 2,3-Dimethylbutadiens-1,3, Pentadiens u. dgl. Das Elastomere soll etwa 20 bis 40% des Gesamtgewichtes Verfahren zur Herstellung einer Schlauchfolie Anmelder:The elastomer can be a polymer of natural or artificial origin. These polymers are characterized by being elastic and stretchable and recovering after the stretching forces have ceased to contract. Such elastomers include natural rubber as well as polymers and Copolymers of isobutylene, butadiene, isoprene, chloroprene, isopentene, isooctene, 2,3-dimethylbutadiene-1,3, Pentadiene and the like. The elastomer should be about 20 to 40% of the total weight Applicant:
Du Pont of Canada Limited, Montreal (Kanada) Vertreter:Du Pont of Canada Limited, Montreal (Canada) Representative:
Dr.-Ing. W. Abitz, Patentanwalt, München 27, Pienzenauer Str. 28 ίο , Dr.-Ing. W. Abitz, patent attorney, Munich 27, Pienzenauer Str. 28 ίο,
Als Erfinder benannt:Named as inventor:
Thomas Richard Johnston, Whitby, Ontario (Kanada)Thomas Richard Johnston, Whitby, Ontario (Canada)
Beanspruchte Priorität:Claimed priority:
Kanada vom 7. Februar 1961 (816458)Canada February 7, 1961 (816458)
des Gemisches bilden; etwa 30 Gewichtsprozent stellen einen bevorzugten Elastomeranteil dar.form the mixture; about 30 percent by weight is a preferred elastomer component.
Das Äthylenpolymerisat und das Elastomere werden vor dem Auspressen in herkörnmlicher Weise gemischt, wie auf einem Mischer der Bauart Banbury, durch Aufrnischen auf der Schneckenpresse, auf be: heizten Mischwalzen der in der · Kautschuktechnik verwendeten Art oder durch Vermischen heißer Lösungen der beiden Bestandteile in einem geeigneten, gemeinsamen Lösungsmittel. Man kann jede Mischmethode anwenden, die ein homogenes Gemisch· liefert. Dem Gemisch können, wenn gewünscht, auch kleinere Mengen an Pigmenten und/oder Füllstoffen einverleibt werden.The ethylene polymer and the elastomer are mixed in herkörnmlicher manner before pressing as in a mixer of the type Banbury, by Aufrnischen on the worm press to be: a heated mixing rolls of the type used in the · rubber technology or hot by mixing solutions of the two components in suitable common solvent. Any mixing method that produces a homogeneous mixture can be used. If desired, smaller amounts of pigments and / or fillers can also be incorporated into the mixture.
Nach einer bevorzugten Ausführungsform werden bei der Auspressung des Äthylenpolymerisat-Elastomer-Gemisches in dem aufgeblasenen Schlauch zwischen der Spritzdüse und der Aufwickelwalze zwei Druckzonen angewandt. Die erste Druckzone liegt nahe der Düse und hat einen genügenden Druck, um den Schlauch auf den gewünschten Durchmesser auszudehnen, während er sich noch im plastischen Formungszustand befindet. Die zweite Druckzone hegt zwischen der Stelle, an welcher die Ausdehnung des Schlauches auf den gewünschten Durchmesser bewirkt ist, und dem Spalt der Aufwickelwalze. Der Druck in dieser Zone Hegt unter demjenigen in der ersten Zone und ist gerade so hoch, daß der gewünschte Schlauchdurchmesser aufrechterhalten wird, aber keine weitere Aufblähung oder Ausdehnung erfolgt. Mit einem Kühler in dem ausgedehnten Schlauch kann man nicht nur die beiden verschie-According to a preferred embodiment, the ethylene polymer-elastomer mixture is pressed out in the inflated hose between the spray nozzle and the take-up roller two Pressure zones applied. The first pressure zone is close to the nozzle and has sufficient pressure to expand the tube to the desired diameter while it is still in the plastic forming state is located. The second pressure zone lies between the point at which the expansion of the Hose is effected to the desired diameter, and the gap of the winding roller. Of the Pressure in this zone is below that in the first zone and is just high enough as that which is desired Tube diameter is maintained but no further inflation or expansion occurs. With a cooler in the extended hose, not only can the two different
709 637/641709 637/641
Claims (1)
16913.1
169
11512.1
115
10510.5
105
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA816458 | 1961-02-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1247607B true DE1247607B (en) | 1967-08-17 |
Family
ID=4141284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP28749A Pending DE1247607B (en) | 1961-02-07 | 1962-02-06 | Process for producing a tubular film |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1247607B (en) |
FR (1) | FR1342759A (en) |
GB (1) | GB933090A (en) |
NL (1) | NL274420A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2966700A (en) * | 1958-08-27 | 1961-01-03 | Pont Company Of Canada 1956 Lt | Production of thermoplastic seamless tubing |
-
0
- NL NL274420D patent/NL274420A/xx unknown
-
1962
- 1962-02-05 GB GB4267/62A patent/GB933090A/en not_active Expired
- 1962-02-06 DE DEP28749A patent/DE1247607B/en active Pending
- 1962-02-07 FR FR887221A patent/FR1342759A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2966700A (en) * | 1958-08-27 | 1961-01-03 | Pont Company Of Canada 1956 Lt | Production of thermoplastic seamless tubing |
Also Published As
Publication number | Publication date |
---|---|
GB933090A (en) | 1963-08-08 |
FR1342759A (en) | 1963-11-15 |
NL274420A (en) | 1900-01-01 |
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