DE2541573B2 - METHOD OF JOINING PARTS MADE OF POLYVINYLIDEN FLUORIDE - Google Patents
METHOD OF JOINING PARTS MADE OF POLYVINYLIDEN FLUORIDEInfo
- Publication number
- DE2541573B2 DE2541573B2 DE19752541573 DE2541573A DE2541573B2 DE 2541573 B2 DE2541573 B2 DE 2541573B2 DE 19752541573 DE19752541573 DE 19752541573 DE 2541573 A DE2541573 A DE 2541573A DE 2541573 B2 DE2541573 B2 DE 2541573B2
- Authority
- DE
- Germany
- Prior art keywords
- polyvinylidene fluoride
- thickness
- heated
- solution
- pipe
- 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.)
- Granted
Links
Classifications
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4895—Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
- B29C66/7352—Thickness, e.g. very thin
- B29C66/73521—Thickness, e.g. very thin of different thickness, i.e. the thickness of one of the parts to be joined being different from the thickness of the other part
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
- C08J5/122—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using low molecular chemically inert solvents, swelling or softening agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
- C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
- C08J5/125—Adhesives in organic diluents
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- 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
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
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- 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
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/16—Homopolymers or copolymers of vinylidene fluoride
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Verbinden von Teilen aus Polyvinylidenfluorid.The invention relates to a method for joining parts made of polyvinylidene fluoride.
Beim Zusammenfügen von Rohren aus Polyvinylidenfluorid ist das Heißluftschweißen unter Zusatz eines Werkstoffs nicht immer anwendbar, da häufig die notwendige Stromversorgung und die Preßluft an den Arbeitsplätzen nicht verfügbar sind.When joining pipes made of polyvinylidene fluoride, hot air welding with the addition of a Material not always applicable, as the necessary power supply and compressed air are often supplied to the Jobs are not available.
Die Verwendung von Heizspiegeln eignet sich zum Stumpfschweißen von dickwandigen Rohren, nicht .jedoch für dünnwandige Rohre, wie sie meistens bei Polyvinylidentetrafluorid vorliegen Tatsächlich ist diese Technik anscheinend oft zufriedenstellend, sie garan-Ik rt jedoch nicht immer Wasserdichtheit unter Druck.The use of heated mirrors is not suitable for butt welding thick-walled pipes .but for thin-walled pipes, as they are mostly found with polyvinylidene tetrafluoride, this is actually Technology often seems to be satisfactory, they garan-Ik However, it is not always watertight under pressure.
Die Technik un .r Verwendung eines Heizdorns führt zu sehr guten Ergebnissen, wenn die Rohrwände dick sind Man füg! ein Rohr in das andere, das vorher mit einem Ansatzstutzen versehen wurde, wobei beide Rohre vorher mit dem Heizdorn auf die gewünschte Temperatur aufgeheizt worden waren Man verwendet vorteilhaft einen gebogenen Stutzen oder Verbindungsstuck und aurcn doppeiieb Scnwciurrfi tfhä!; msn be: Rohren mit dicken Wänden eine ausgezeichnete und vollständig dichte Verschweißung. Diese Technik hat den Vorteil, die Homogenität des Materials zu erhalten, da kein Zusatzmiitel und kein PJastikmateria) als Schweißmittel oder Leim benötigt wird. Diese Homogenität ist bei Vmylidenpolyfluorid besonders zur Erhaltung der chemischen Beständigkeit erwünscht, die diesen Polymeren eigen ist. ohne auf die Beständigkeit des Leims oder des Zusa:zwp^ Stoffs beschränkt zu sein. Ungünstigerweise ist dieses ν erfahren jedoch nicht auf Vinyiidenpolyfluondrohre mit geringen Wandstärken anwendbar. Wegen des Schmelzens der gesamten 6s Rohrstärke auf dem Dorn tritt tatsachlich eine Deformation ein. und beim Abnehmen vom Dorn zum Ansetzen des Rohres blesb! der kreisförmige Quer schnitt nicht erhalten. Die Erfahrung zeigt, daß in diesem Fall im allgemeinen die Dichtheit nicht gut ist.The technique and the use of a heating mandrel leads to very good results if the pipe walls are thick. Add! one tube into the other, which was previously provided with a connecting piece, whereby both tubes had previously been heated to the desired temperature with the heating mandrel. It is advantageous to use a curved nozzle or connecting piece and a double screw-in fitting; msn be: pipes with thick walls an excellent and completely tight weld. This technique has the advantage to obtain the homogeneity of the material, since no Zusatzmiitel and no PJastikmateria) is required as a welding means or glue. This homogeneity is particularly desirable in the case of vinylidene polyfluoride in order to maintain the chemical resistance which is inherent in these polymers. without being limited to the durability of the glue or the composition. Unfortunately, however, this ν is not applicable to vinylidene polyfluoro pipes with small wall thicknesses. Deformation actually occurs due to the melting of the entire 6s tube thickness on the mandrel. and when removing the mandrel to attach the pipe blesb! the circular cross-section is not preserved. Experience shows that in this case the tightness is generally not good.
Auch das Verkleben der Rohre in der Kälte hat bei Polyvinylidenfluorid Schwierigkeiten ergeben. Die sehr hohe chemische Beständigkeit des Polyvinylidenfluorids und seine Unlöslichkeit in Lösungsmitteln in der Kälte macht das Verkleben nvt einer Polyvinylidenfluoridlösung in der Käiie im allgemeinen unmöglich. Man muß daher eine andere gelöste Substanz nehmen und verschiedene Zweikomponentenkleber können geeignet sein. Jedoch weisen diese an der Arbeitsstelle in zwei Richtungen Nachteile auf: Ihre Anwendungsdauer ist ;sehr kurz und kann nicht verlängert werden, ohne gleichzeitig die Trocknungszeit zu verlängern. Dies ist ein Nachteil, der die Anwendung unmöglich machen kann. Weiterhin wird durch den Kleber ein Zusatzmaterial hinzugebracht, das von dem Plav-kmaierial unterschiedlich ist, und die Unterschiede der Feyigkeit bei der jeweiligen Temperatur oder des Alterns, die manchmal sehr groß sind, können die Anweadungsbe reiche für Rohrwaren aus Polyvinylidenfluorid eingrenzen. Gluing the pipes in the cold has also resulted in difficulties with polyvinylidene fluoride. The very high chemical resistance of polyvinylidene fluoride and its insolubility in solvents in the cold makes the gluing nvt a polyvinylidene fluoride solution generally impossible in the cai. One must therefore take a different solute and different two-part adhesives may be suitable be. However, these have two disadvantages at the workplace: Their duration of use is ; very short and cannot be extended without increasing the drying time at the same time. This is a disadvantage that can make it impossible to use. Furthermore, the adhesive becomes an additional material added that of the Plav-kmaierial is different, and the differences in strength at the respective temperature or aging, which are sometimes very high, the application conditions can Limit range for pipe goods made of polyvinylidene fluoride.
Ferner ist es aus der DT-PS 8 35 062 bekannt. Folien aus Polyvinylverbindungen gegebenenfalls unter geringem Erwärmen an den zu verklebenden Flächen, mit Lösungsmitteln zu benetzen und dann zusammenzudrücken, um auf diese Weise mehrschichtige Folien herzustellen, aus denen Formkörper hergestellt werden können. Dieses Verfahren ist jedoch nicht auf Polyvinylidenfluorid anwendbar, da dieses in der Kälte in Lösungsmitteln unlöslich ist und außerdem werden auf diese Weise keine Formkörper miteinander verbunden.It is also known from DT-PS 8 35 062. Foils made of polyvinyl compounds, if necessary with slight heating on the surfaces to be bonded, with To wet solvents and then to compress, in this way multilayer films produce, from which moldings can be made. However, this procedure is not on Polyvinylidene fluoride can be used, as this is insoluble in solvents in the cold and also becomes in this way no molded bodies are connected to one another.
Aufgabe der Erfindung ist es daher, ein Verfahren zum Verbilden von Formteilen aus Polyvinylidenfluorid zu schaffen, das aucn bei Formteilen mit geringerer Stärke in einfacher und sicher Weise anwendbar ist.The object of the invention is therefore to provide a method for forming molded parts from polyvinylidene fluoride to create that can also be used in a simple and safe manner for molded parts with a lower thickness.
Diese Aufgabe wird dadurch gelöst, daß man das Teil von geringerer Dicke mit einem Mittel zürn Lösen von Polyvinylidenfluorid in der Wärme oder mit einer Lösung von Polyvinylidenfluorid bestreicht, das dickere Stück auf eine Temperatur zwischen 150 und 320° C erhitzt, die zwei zu verbindenden Flächen in Koniakt bringt und sie in dieser Stellung während dec <\bkühlens hält.This object is achieved in that the part of smaller thickness is coated with an agent for dissolving polyvinylidene fluoride in heat or with a solution of polyvinylidene fluoride, the thicker piece is heated to a temperature between 150 and 320 ° C, the two surfaces to be connected brings in Koniakt and keeps it in this position during de c <\ bkühlens.
Die vom dickeren Si ,k mitgebrachte Wä-me wird auf das dünnere Stuck übertragen und das Lösungsmittel kann so oberflächlich die beiden Te^e. die auf eine passende Temperatur gebracht wurden, anlösen und so zu einer innigen und homogenen Verklebung führen, die eine ausgezeichnete Dichtigkeit garantiert, und dies schon wenige Minuten nach dem Abkühlen.The warmth brought by the thicker Si, k is transferred to the thinner piece and the solvent can so superficially affect the two parts. which on a brought to the right temperature, dissolve and so on lead to an intimate and homogeneous bond that guarantees excellent tightness, and this just a few minutes after cooling.
Urr. sin PolyvlriyüHpnfhinrid-Rohr mit einm anderen Stück desselben Materials zu verkleben, einem Rohr mit dickeren Wänden, einer Muffe, einem geraden oder gebogenen Verbindungsstück. Reduktionsstück, einer Zwinge mit Gewindt, Flansch, einem Ausdehnungsteil. Ventil. Hahn usw. kann man in folgender Weise vorgehen:Urr. sin PolyvlriyüHpnfhinrid-Rohr with one another Glue pieces of the same material, using a pipe thicker walls, a socket, a straight or curved connector. Reduction piece, one Clamp with thread, flange, an expansion part. Valve. Hahn etc. can be done in the following way proceed:
Man bestreicht das Ende des Rohrs äußerlich auf einigen Zentimetern mit einem warmen Lösungsmittel für Polyvinylidenfluorid oder einer Lösung von Polyvinylidenfluorid in einem iolchen lösungsmittel, man erhitzt mit irgendeinem bekannten Mittel die innere Oberfläche des Werkstucks, das man hiermi1 zusammensetzen will. cas. um genau zu passen, einen größeren innendurchmesser und -ine größere Wandstärke als das Rohr habt· iß, man setzt das mit Lösungsmittel <*derIt sweeps the end of the tube outwardly to a few centimeters with a hot solvent for polyvinylidene fluoride or polyvinylidene fluoride in a solution of a iolchen solvent is heated by any known means, the inner surface of the workpiece, that one wants to put together hiermi. 1 cas. In order to fit exactly, it has a larger inside diameter and a larger wall thickness than the pipe, it is set with a solvent
Lösung bestrichene Rohr in das Stück ein. dessen innere Oberfläche auf die gewünschte Temperatur erhitzt wurde. Nach einigen Minuten ist die Klebung vollständig homogen und dicht.Solution smeared pipe into the piece. its inner Surface has been heated to the desired temperature. After a few minutes the bond is complete homogeneous and dense.
Es ist nötig, daß das Lösungsmittel sehr rasche Wirkung auf das Polymer besitzt, da die Temperatur beim Kleben sehr schnell fällt, wenn die Heizung nicht mehr aufrecht erhalten wird. Daher wendet man beim erfindungsgemäßen Verfahren vorzugsweise eins der folgenden Mittel zum Lösen von Polyvinylidenfluorid in der Wärme an: Dimethylformamid. Dimethylacetamid, Tetrahydrofuran, Dimethylsulfoxid. Cyclohexanon, Hexamethylphosphoramid, Butyrolacton oder Lösungsmittel derselben Gattung oder ihre Gemische, deren Wirkung besonders rasch ist, Man kann genauso bevorzugt eine Lösung von Polyvinylidenfluorid in einem der genannten Lösungsmittel verwenden, die eine höhere Viskosität besitzt.It is necessary that the solvent have a very quick effect on the polymer because of the temperature falls very quickly when gluing if the heating is no longer maintained. Therefore one turns to Method according to the invention preferably one of the following means for dissolving polyvinylidene fluoride in of heat: dimethylformamide. Dimethylacetamide, tetrahydrofuran, dimethyl sulfoxide. Cyclohexanone, hexamethylphosphoramide, Butyrolactone or solvents of the same type or their mixtures, the action of which is particularly rapid, you can do the same preferably use a solution of polyvinylidene fluoride in one of the solvents mentioned, the one has a higher viscosity.
Die Temperatur, au ι die man das dickere Rohr erhitzt, kann von 150° C bis 320° C gehen, je nach Bedeutung der Durchmesser und der Stärken der beiden zusammenzufügenden Teile. Beispielsweise wird empfohlen, wenn das Teil eine Stärke von über 3 mm hat, das zu klebende Ende über eine Zeit zwischen 2 bis 30 see auf eine Temperatur im Bereich von 300° C zu erwärmen. Wenn das Teil über seine ganze Stärke hin erhitzt wird, beispielsweise in einem Wärmeschrank, kann man sich mit einer Temperatur von 150° C begnügen.The temperature to which the thicker pipe is heated can range from 150 ° C to 320 ° C, depending on the meaning the diameter and thickness of the two parts to be joined. For example, it is recommended if the part is more than 3 mm thick, open the end to be glued for a time between 2 and 30 seconds to heat a temperature in the range of 300 ° C. When the part is heated to its full strength, For example, in a heating cabinet, you can be content with a temperature of 150 ° C.
Die folgenden Beispiele verdeutlichen das erfindungsgemäße Verfahren:The following examples illustrate the process according to the invention:
Man nimmt ein Polyvinylidenfluorid-itohr mit einem äußeren Durchmesser von 20 mm und einem inneren Durchmesser von 17 mm. Das eine Ende dieses Rohrs ist auf eine Länge von 10 mm mit Dimethylacetamid bestrichen. Mit Hilfe einer Metallhülse,deren hervorste hender Teil auf eine Temperatur zwischen 290 und 315° C erhitzt wurde, erhitzt man die innere Oberfläche einer 30 mm langen Polyvinylidenmuffe mit einem äußeren Durchmesser von 26 mm und einem inneren Durchmesser von 20 mm auf eine Länge von 15 mm. Diese Muffe wurde 4 see lang auf den geheizten Dorn gehalten und dann schnell auf das mit Lösungsmittel beschichtete Rohr aufgesteckt. 2 inin nach dem Zusammenbringen stellt man fest, daß die Bindung ausgezeichnet ist.You take a polyvinylidene fluoride itohr with a outer diameter of 20 mm and an inner diameter of 17 mm. One end of that pipe is Brushed over a length of 10 mm with dimethylacetamide. With the help of a metal sleeve whose protruding If the part has been heated to a temperature between 290 and 315 ° C, the inner surface is heated a 30 mm long polyvinylidene sleeve with an outer diameter of 26 mm and an inner Diameter of 20 mm over a length of 15 mm. This sleeve was placed on the heated mandrel for 4 seconds held and then quickly attached to the solvent-coated tube. 2 inin after the When you bring them together, you find that the bond is excellent.
Man nimmt ein Rohr und eine Muffe wie in Beispiel 1, jedoch verwendet man zum Bestreichen des Rohrs eine Losung, die durch Auflösen von 20% Polyvinylidenfluorid in Dimethylacetamid bei 60° C erhalten wurde. Diese Lösung wird bei 20° C verwendet Unter Beachtung derselben Verfahrensmaßnahmen wie in Beispiel 1 erhält man eine vollständig homogene und dichte Verbindung.Take a pipe and a socket as in Example 1, however, one uses one to paint the pipe Solution obtained by dissolving 20% polyvinylidene fluoride in dimethylacetamide at 60 ° C. This solution is used at 20 ° C Observing the same procedural measures as in Example 1, a completely homogeneous and tight connection.
B e ε s ρ i e I 3B e ε s ρ i e I 3
Man nimmt eine Polyvinylidenfluorid-Platte einer Oberfläche von 400 cm2 und einer Stärke von 3 mm, in die man Löcher von 20 mm Durchmesser zur Aufnahme von Rohren desselben äußeren Durchmessers und von 18 mm inneren Durchmesser gebohrt hat. Vor dem Befestigen auf der Platte werden die Enden der Rohre, auf 5 mm Länge mit einer lösung von Raumtemperatur gestrichen, die durch vorherigen Lösen von 'j%A polyvinylidene fluoride plate with a surface area of 400 cm 2 and a thickness of 3 mm is taken, in which holes 20 mm in diameter have been drilled to accommodate pipes of the same external diameter and 18 mm internal diameter. Before fixing on the plate, the ends of the pipes are painted over a length of 5 mm with a solution at room temperature, which can be obtained by loosening 1%
Polyvinylidenfluorid in Dimethylformamid bei 60° C erhärten wsr. Man führt einen Metaildorn. dessen hervorragender Teil auf Temperaturen zwischen 290 und 315° C erhitzt ist, in jedes in die Platte gebohrte Loch ein. Nach 4 see. zieht man die Metallhülse zurück und setzt an ihre Stelle schnell die mit Polyvinylidenfluo rid-Lösung bestrichenen Enden der Rohre, die man befestigen will, ein- Nach dem Abkühlen sind die Rohre vollständig auf der Platte befestig«.Polyvinylidene fluoride harden in dimethylformamide at 60 ° C water. A metal mandrel is used. whose excellent part is heated to temperatures between 290 and 315 ° C, each drilled into the plate Hole one. After 4 see. the metal sleeve is withdrawn and the one with polyvinylidene fluorine is quickly put in its place rid solution coated ends of the pipes that you want to attach, a After the pipes have cooled down fully attached to the plate «.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7431780A FR2285227A1 (en) | 1974-09-20 | 1974-09-20 | PROCESS FOR ASSEMBLING VINYLIDENE POLYFLUORIDE PARTS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2541573A1 DE2541573A1 (en) | 1976-04-22 |
| DE2541573B2 true DE2541573B2 (en) | 1977-07-28 |
| DE2541573C3 DE2541573C3 (en) | 1982-07-15 |
Family
ID=9143285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2541573A Expired DE2541573C3 (en) | 1974-09-20 | 1975-09-18 | Method for joining objects of different thicknesses made of polyvinylidene fluoride |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5818218B2 (en) |
| BE (1) | BE833253A (en) |
| CA (1) | CA1048247A (en) |
| CH (1) | CH603727A5 (en) |
| DE (1) | DE2541573C3 (en) |
| FR (1) | FR2285227A1 (en) |
| GB (1) | GB1492328A (en) |
| IT (1) | IT1047159B (en) |
| NL (1) | NL183929C (en) |
| SE (1) | SE407361B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54112943A (en) * | 1978-02-23 | 1979-09-04 | Kureha Chem Ind Co Ltd | Adhesive for vinylidene fluoride resin and method of bonding |
| JPS60214928A (en) * | 1984-04-09 | 1985-10-28 | Lonseal Corp | Welding of waterproof sheet |
| GB2194303A (en) * | 1986-08-21 | 1988-03-02 | Croydex Company Limited The | Assembly of tap connectors to hoses |
| JPH04124219U (en) * | 1991-04-23 | 1992-11-12 | 日本アビオニクス株式会社 | Microscope observation jig |
| US5237049A (en) * | 1992-08-28 | 1993-08-17 | E. I. Du Pont De Nemours And Company | Purification and adhesion of fluoropolymers |
| US5458719A (en) * | 1993-03-24 | 1995-10-17 | Pall Corporation | Method for bonding a porous medium to a substrate |
| FR2975995B1 (en) | 2011-06-06 | 2015-03-20 | Arkema France | SOLVENTS OF FLUORINATED POLYMERS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE835062C (en) * | 1946-07-05 | 1952-03-27 | Basf Ag | Process for the production of multilayer molded articles from polyvinyl compounds |
-
1974
- 1974-09-20 FR FR7431780A patent/FR2285227A1/en active Granted
-
1975
- 1975-09-02 IT IT69190/75A patent/IT1047159B/en active
- 1975-09-09 JP JP50108591A patent/JPS5818218B2/en not_active Expired
- 1975-09-10 BE BE159896A patent/BE833253A/en not_active IP Right Cessation
- 1975-09-16 GB GB38056/75A patent/GB1492328A/en not_active Expired
- 1975-09-16 SE SE7510364A patent/SE407361B/en not_active IP Right Cessation
- 1975-09-18 DE DE2541573A patent/DE2541573C3/en not_active Expired
- 1975-09-19 NL NLAANVRAGE7511090,A patent/NL183929C/en not_active IP Right Cessation
- 1975-09-19 CA CA75236070A patent/CA1048247A/en not_active Expired
- 1975-09-19 CH CH1217475A patent/CH603727A5/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL7511090A (en) | 1976-03-23 |
| CH603727A5 (en) | 1978-08-31 |
| CA1048247A (en) | 1979-02-13 |
| NL183929B (en) | 1988-10-03 |
| BE833253A (en) | 1976-03-10 |
| SE7510364L (en) | 1976-03-22 |
| GB1492328A (en) | 1977-11-16 |
| DE2541573A1 (en) | 1976-04-22 |
| SE407361B (en) | 1979-03-26 |
| JPS5818218B2 (en) | 1983-04-12 |
| NL183929C (en) | 1989-03-01 |
| DE2541573C3 (en) | 1982-07-15 |
| FR2285227B1 (en) | 1976-12-31 |
| JPS5153578A (en) | 1976-05-12 |
| IT1047159B (en) | 1980-09-10 |
| FR2285227A1 (en) | 1976-04-16 |
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