EP1427783A1 - Extrusion profile and method of production thereof - Google Patents

Extrusion profile and method of production thereof

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Publication number
EP1427783A1
EP1427783A1 EP02762469A EP02762469A EP1427783A1 EP 1427783 A1 EP1427783 A1 EP 1427783A1 EP 02762469 A EP02762469 A EP 02762469A EP 02762469 A EP02762469 A EP 02762469A EP 1427783 A1 EP1427783 A1 EP 1427783A1
Authority
EP
European Patent Office
Prior art keywords
profile
extrusion
glass fibers
polymer
particularly preferably
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.)
Withdrawn
Application number
EP02762469A
Other languages
German (de)
French (fr)
Inventor
Thomas Tschech
Helmut Schulte
Georg Remmert
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.)
Lanxess Deutschland GmbH
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of EP1427783A1 publication Critical patent/EP1427783A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0085—Use of fibrous compounding ingredients
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92447—Moulded article
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • 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
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
    • C08J2201/03—Extrusion of the foamable blend
    • 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
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249976—Voids specified as closed
    • Y10T428/249977—Specified thickness of void-containing component [absolute or relative], numerical cell dimension or density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249986—Void-containing component contains also a solid fiber or solid particle

Definitions

  • the invention relates to an extrusion profile based on thermoplastic polymers, in particular polyamide, and a process for its production.
  • the extrusion profile has gas pores generated by means of blowing agent, which reduce the thermal conductivity of the profile.
  • thermo insulation webs It is known to produce profiles by extrusion from glass-fiber-reinforced polyamide, which are used in particular in window construction as thermal insulation webs.
  • the thermal insulation bars are non-positively connected to the two aluminum profiles of the window frame and reduce the heat transfer and thus prevent the formation of condensate moisture on the when side.
  • the prefabricated polyamide-aluminum composite profiles are suitable for use in paint baking ovens at 220 to 230 ° C.
  • Aluminum windows are usually double-shell constructions.
  • the halves of the window frame are non-positively connected to the thermal insulation bars and prevent the formation of condensate moisture on the warm side due to the low thermal conductivity of the profile.
  • the heat transfer of the entire construction is reduced through the use of the thermal insulation bars.
  • the object of the invention is to provide profiles based on thermoplastic polymers and a process for their production, which avoids the disadvantages of the known profiles and has a comparatively lower thermal conductivity.
  • the profile should have a certain elasticity.
  • known plastic materials can cause the plastic to become brittle. Elastic properties of the profile should therefore also be improved if necessary.
  • the object is achieved in that a gas-producing blowing agent is added to the polymer composition in an extrusion process of the type mentioned at the outset.
  • the invention relates to an extrusion profile based on thermoplastic polymers, in particular polyamide, particularly preferably polyamide 6.6, which are reinforced in particular with glass fibers and a proportion of glass fibers of 15 to
  • the glass fibers are preferably short glass fibers with a length of 200 to 400 ⁇ m.
  • the density of the profile material is preferably at most 0.8 g / cm 3 .
  • a particularly preferred embodiment of the extrusion profile is characterized in that the thermal conductivity of the profile measured in the transverse direction is at most 0.3 W / mK, in particular at most 0.25 W / mK, particularly preferably at most 0.2 W / mK.
  • the extrusion profile has one compared to the non-foamed profile
  • the melt viscosity of the base polymer at the melt temperature should be> 2500 Pa.s at a shear rate of 50 sec -1 .
  • thermal insulation webs of this type can also be produced from PVC.
  • the industrial production of finished window frame profiles with stove enamelling at 220 ° C to 230 ° C in a continuous opening is not possible with PVC in an aluminum composite.
  • a heat resistance of the extrusion profile of 220 ° C. is desirable.
  • the coefficient of thermal expansion of the extrusion profile should be especially in the
  • Range from 20 to 30 1 / K in order to keep warping stresses low.
  • polymers that are basically possible are polycarbonate, ABS, polypropylene, TPU or possible mixtures of these polymers.
  • the invention also relates to a process for producing extrusion profiles based on thermoplastic polymers, in particular polyamide, particularly preferably polyamide 6.6, which are reinforced in particular with glass fibers and a proportion of glass fibers of 15 to 50% by weight, particularly preferably of 20 contain up to 30% by weight of glass fibers, by melting the polymer and optionally
  • Additives extruding the polymer mass to form a professional strand, cooling and shaping the profile in a calibrator, stripping and further cooling the profile in a cooling bath, characterized in that the polymer has a gas-generating blowing agent in an amount of 0.1 to 5 before the extrusion % By weight is added, the blowing agent decomposing at a temperature above 180 ° C., and allowing the polymer mass to foam after it has emerged from the extrusion die.
  • a method is preferred in which the gas-generating propellant is added in an amount of 0.5 to 2% by weight.
  • the quality of the profiles can be ensured if the mass flow of the polymer strand is measured and regulated in front of the calibrator in a preferred method.
  • the flow rate is particularly preferably regulated via the take-off speed of the profile strand.
  • the measurement is advantageously carried out in particular by means of an IR absorption sensor.
  • Another object of the invention is the use of the extrusion profiles according to the invention as heat-insulating fastening webs, in particular for the production of windows based on metal profiles, preferably aluminum profiles.
  • Fig. 1 shows a cross section through an extrusion profile according to the invention
  • Fig. 2 shows a cross section of a thermally insulated aluminum profile with two
  • the window insulation profile is manufactured using conventional profile extrusion technology.
  • the system consists of an extruder, a calibration and cooling line, a take-off unit and an automatic saw.
  • Snail was a three-zone screw without a degassing device.
  • the two calibration dishes can be tempered separately.
  • the length of the two calibration dishes can be tempered separately.
  • Calibration distance is approx. 115 mm. This is followed by further cooling in a water bath.
  • the material was a polyamide of the type: Durethan KU2-2240 / 25 H2.0, (manufacturer Bayer AG) (PA 6.6 with a proportion of 25% by weight of glass fibers).
  • the polyamide was extruded at a temperature of 273 ° C.
  • the processing conditions are listed in detail in Table 1. 2% by weight of Hydrocerol HK 70 (blowing agent based on citric acid) had been added to the polyamide 6.6 as blowing agent in the feed zone.
  • the polyamide was subjected to predrying under the following conditions: Drying parameters temperature: 110 ° C time: 4 h
  • Drying device dry air dryer from Gerco.
  • Fig. 1 shows schematically the profile 1 in cross section.
  • the pores 2 of gas are distributed over the entire cross section.
  • Two profiles 1 produced according to the above-mentioned method are mounted in an aluminum window frame (see FIG. 2) between the frame parts 3 and 4 and fixed by pressing the aluminum guide. In use, there is a reduced heat transfer between the frame parts 3 and 4.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention relates to an extrusion profile based on thermoplastic polymers, in particular polyamide and a method for producing the same. Said extrusion profile (1) comprises pores (2), produced by means of blowing agents, which lead to a diminution of the profile thermal conductivity.

Description

Extrusionsprofil und Verfahren zu seiner HerstellungExtrusion profile and process for its manufacture
Die Erfindung betrifft ein Extrusionsprofil auf Basis thermoplastischer Polymere, insbesondere Polyamid und ein Verfahren zu seiner Herstellung. Das Extrusionsprofil weist mittels Treibmittel erzeugte Gasporen auf die eine Verringerung der Wärmeleitfähigkeit des Profils bewirken.The invention relates to an extrusion profile based on thermoplastic polymers, in particular polyamide, and a process for its production. The extrusion profile has gas pores generated by means of blowing agent, which reduce the thermal conductivity of the profile.
Es ist bekannt Profile durch Extrusion aus glasfaserverstärktem Polyamid herzustellen, die insbesondere im Fensterbau als Wärmedärnmstege zum Einsatz kommen. Die Wärmedämmstege sind mit den zwei Aluminium-Profilen des Fensterrahmens kraftschlüssig verbunden und reduzieren den Wärmedurchgang und verhindern damit die Bildung von Kondensatfeuchte auf der Wann-Seite. Die vorgefertigten Polyamid-Aluminium- Verbundprofile sind für den Durchlauf in Lackeinbrennöfen bei 220 bis 230°C geeignet.It is known to produce profiles by extrusion from glass-fiber-reinforced polyamide, which are used in particular in window construction as thermal insulation webs. The thermal insulation bars are non-positively connected to the two aluminum profiles of the window frame and reduce the heat transfer and thus prevent the formation of condensate moisture on the when side. The prefabricated polyamide-aluminum composite profiles are suitable for use in paint baking ovens at 220 to 230 ° C.
Aluminium-Fenster sind üblicherweise zweischalige Konstruktionen. Die Hälften des Fensterrahmens werden mit den Wärmedämmstegen kraftschlüssig verbunden und verhindern aufgrund der geringen Wärmeleitfähigkeit des Profils die Bildung von Kondensatefeuchte auf der Warmseite. Außerdem wird der Wärmedurchgang der gesamten Konstruktion durch den Einsatz der Wärmedämmstege reduziert.Aluminum windows are usually double-shell constructions. The halves of the window frame are non-positively connected to the thermal insulation bars and prevent the formation of condensate moisture on the warm side due to the low thermal conductivity of the profile. In addition, the heat transfer of the entire construction is reduced through the use of the thermal insulation bars.
Aufgabe der Erfindung ist es Profile auf Basis thermoplastischer Polymere und ein Verfahren zu ihrer Herstellung bereitzustellen, das die Nachteile der bekannten Profile vermeidet und eine vergleichbar niedrigere Wärmeleitfähigkeit aufweist.The object of the invention is to provide profiles based on thermoplastic polymers and a process for their production, which avoids the disadvantages of the known profiles and has a comparatively lower thermal conductivity.
Außerdem sollte das Profil eine gewisse Elastizität aufweisen. Beim Anpressen von z.B. Aluminiumprofilen an das Kunststoffprofil zur Bildung einer kraftschlüssigen Verbindung kann es bei bekannten Kunststoffmaterialien zu einem spröden Bruch des Kunststoffes kommen. Elastische Eigenschaften des Profiles sollen daher gegebenenfalls auch verbessert werden.In addition, the profile should have a certain elasticity. When, for example, aluminum profiles are pressed onto the plastic profile to form a non-positive connection, known plastic materials can cause the plastic to become brittle. Elastic properties of the profile should therefore also be improved if necessary.
Die Aufgabe wird erfmdungsgemäß dadurch gelöst, dass in einem Extrusions- verfahren der eingangs genannten Art der Polymermasse vor dem Extrudieren ein gaserzeugendes Treibmittel zugesetzt wird.According to the invention, the object is achieved in that a gas-producing blowing agent is added to the polymer composition in an extrusion process of the type mentioned at the outset.
Gegenstand der Erfindung ist ein Extrusionsprofil auf Basis thermoplastischer Polymere, insbesondere Polyamid, besonders bevorzugt Polyamid 6.6, die insbe- sondere mit Glasfasern verstärkt sind und einen Anteil an Glasfasern von 15 bisThe invention relates to an extrusion profile based on thermoplastic polymers, in particular polyamide, particularly preferably polyamide 6.6, which are reinforced in particular with glass fibers and a proportion of glass fibers of 15 to
50 Gew.-%, besonders bevorzugt von 20 bis 30 Gew.-% Glasfasern enthalten, dadurch gekennzeichnet, dass die Dichte des Profilmaterials höchstens 1 g/cm3 beträgt und das Profil über den Querschnitt des Profils verteilte Gasporen mit einer mittleren Größe von etwa 0,1 bis 0,5 mm enthält.Contain 50% by weight, particularly preferably 20 to 30% by weight, of glass fibers, characterized in that the density of the profile material is at most 1 g / cm 3 and the profile has gas pores distributed over the cross section of the profile with an average size of approximately Contains 0.1 to 0.5 mm.
Bevorzugt sind die Glasfasern Kurzglasfasern mit einer Länge von 200 bis 400 μm.The glass fibers are preferably short glass fibers with a length of 200 to 400 μm.
Die Dichte des Profilmaterials beträgt bevorzugt höchstens 0,8 g/cm3.The density of the profile material is preferably at most 0.8 g / cm 3 .
Eine besonders bevorzugte Ausführung des Extrusionsprofils ist dadurch gekennzeichnet, dass die Wärmeleitfähigkeit des Profils in Querrichtung gemessen höchstens 0,3 W/mK, insbesondere höchstens 0,25 W/mK, insbesondere bevorzugt höchstens 0,2 W/mK beträgt.A particularly preferred embodiment of the extrusion profile is characterized in that the thermal conductivity of the profile measured in the transverse direction is at most 0.3 W / mK, in particular at most 0.25 W / mK, particularly preferably at most 0.2 W / mK.
Das Extrusionsprofil weist gegenüber dem nichtgeschäumten Profil eineThe extrusion profile has one compared to the non-foamed profile
Reduzierung der Wärmeleitfähigkeit um mindestens 10 % auf.Reduction of thermal conductivity by at least 10%.
Um ein kontrolliertes Schäumverhalten zu ermöglichen sollte die Schmelzeviskosität des Basispolymeren bei der Schmelzetemperatur (Extrusion z.B. 290°C) >2500 Pa.s bei einer Schergeschwindigkeit von 50 sec-1 betragen. Grundsätzlich können derartige Wärmedämmstege auch aus PVC hergestellt werden. Die industrielle Herstellung von fertigen Fensterrahmenprofilen mit Einbrenn- lackierung bei 220°C bis 230°C in Durchlauföff ung ist mit PVC im Alu-Verbund allerdings nicht möglich.In order to enable controlled foaming behavior, the melt viscosity of the base polymer at the melt temperature (extrusion, for example 290 ° C.) should be> 2500 Pa.s at a shear rate of 50 sec -1 . In principle, thermal insulation webs of this type can also be produced from PVC. However, the industrial production of finished window frame profiles with stove enamelling at 220 ° C to 230 ° C in a continuous opening is not possible with PVC in an aluminum composite.
Für weitere Bearbeitungsschritte des kompletten Verbundes Metallprofil- Extrusionsprofil ist eine Wärmeformbeständigkeit des Extrusionsprofiles von 220°C wünschenswert.For further processing steps of the complete composite metal profile-extrusion profile, a heat resistance of the extrusion profile of 220 ° C. is desirable.
Der Wärmeausdehnungskoeffizient des Extrusionsprofils sollte insbesondere imThe coefficient of thermal expansion of the extrusion profile should be especially in the
Bereich von 20 bis 30 1/K liegen, um Verzugsbeanspruchungen gering zu halten.Range from 20 to 30 1 / K in order to keep warping stresses low.
Weitere Polymertypen die grundsätzlich in Frage kommen, sind Polycarbonat, ABS, Polypropylen, TPU oder mögliche Mischungen dieser Polymere.Other types of polymers that are basically possible are polycarbonate, ABS, polypropylene, TPU or possible mixtures of these polymers.
Gegenstand der Erfindung ist auch ein Verfahren zur Herstellung von Extrusions- profilen auf Basis thermoplastischer Polymere, insbesondere Polyamid, besonders bevorzugt Polyamid 6.6, die insbesondere mit Glasfasern verstärkt sind und einen Anteil an Glasfasern von 15 bis 50 Gew.-%, besonders bevorzugt von 20 bis 30 Gew.-% Glasfasern enthalten, durch Aufschmelzen des Polymeren und ggf.The invention also relates to a process for producing extrusion profiles based on thermoplastic polymers, in particular polyamide, particularly preferably polyamide 6.6, which are reinforced in particular with glass fibers and a proportion of glass fibers of 15 to 50% by weight, particularly preferably of 20 contain up to 30% by weight of glass fibers, by melting the polymer and optionally
Zusatzstoffen, Extrudieren der Polymermasse unter Bildung eines Profiistrangs, Abkühlen und Ausformen des Profils in einem Kalibrator, Abziehen und weiteres Abkühlen des Profils in einem Kühlbad, dadurch gekennzeichnet, dass dem Polymeren vor dem Extrudieren ein gaserzeugendes Treibmittel in einer Menge von 0,1 bis 5 Gew.-% zugesetzt wird, wobei sich das Treibmittel bei einer Temperatur oberhalb von 180°C zersetzt, und Aufschäumenlassen der Polymermasse nach dem Austritt aus der Extrusionsdüse.Additives, extruding the polymer mass to form a professional strand, cooling and shaping the profile in a calibrator, stripping and further cooling the profile in a cooling bath, characterized in that the polymer has a gas-generating blowing agent in an amount of 0.1 to 5 before the extrusion % By weight is added, the blowing agent decomposing at a temperature above 180 ° C., and allowing the polymer mass to foam after it has emerged from the extrusion die.
Bevorzugt ist ein Verfahren, bei dem das gaserzeugende Treibmittel in einer Menge von 0,5 bis 2 Gew.-% zugesetzt wird. Die Qualität der Profile kann gesichert werden wenn in einem bevorzugten Verfahren der Mengenstrom des Polymerstrangs vor dem Kalibrator gemessen und geregelt wird.A method is preferred in which the gas-generating propellant is added in an amount of 0.5 to 2% by weight. The quality of the profiles can be ensured if the mass flow of the polymer strand is measured and regulated in front of the calibrator in a preferred method.
Besonders bevorzugt erfolgt die Regelung des Mengenstroms über die Abzugsgeschwindigkeit des Profilstrangs.The flow rate is particularly preferably regulated via the take-off speed of the profile strand.
Die Messung wird vorteilhafterweise insbesondere mittels eines IR-Absorptions- sensors durchgeführt.The measurement is advantageously carried out in particular by means of an IR absorption sensor.
Weiterer Gegenstand der Erfindung ist die Verwendung der erfindungsgemäßen Extrusionsprofile als wärmedämmende Befestigungsstege insbesondere zur Herstellung von Fenstern auf Basis von Metallprofilen, bevorzugt Aluminiumprofilen.Another object of the invention is the use of the extrusion profiles according to the invention as heat-insulating fastening webs, in particular for the production of windows based on metal profiles, preferably aluminum profiles.
Die Erfindung wird nachfolgend anhand der Figur durch die Beispiele, welche jedoch keine Beschränkung der Erfindung darstellt, näher erläutert.The invention is explained in more detail below with reference to the figure by the examples, which, however, do not represent a limitation of the invention.
Es zeigt:It shows:
Fig. 1 einen Querschnitt durch ein erfindungsgemäßes ExtrusionsprofilFig. 1 shows a cross section through an extrusion profile according to the invention
Fig. 2 einen Querschnitt eines wärmegedämmten Aluminiumprofils mit zweiFig. 2 shows a cross section of a thermally insulated aluminum profile with two
Fensterisolierprofilen Fensterisolierprofilen
Beispielexample
Extrusionsanlageextrusion plant
Das Fensterisolierprofil wird mit konventioneller Profil-Extrusionstechnik hergestellt. Die Anlage besteht aus einem Extruder, einer Kalibrier- und Abkühlstrecke, einer Abzugseinheit und einer automatischen Säge.The window insulation profile is manufactured using conventional profile extrusion technology. The system consists of an extruder, a calibration and cooling line, a take-off unit and an automatic saw.
Der Extruder (Hersteller: Fa. Kuhne/Troisdorf) hatte einen Schneckendurchmesser von 48 mm und eine Schneckenlänge von 33 D (D = Schneckendurchmesser). DieThe extruder (manufacturer: Kuhne / Troisdorf) had a screw diameter of 48 mm and a screw length of 33 D (D = screw diameter). The
Schnecke war eine Dreizonenschnecke ohne Entgasungseinrichtung.Snail was a three-zone screw without a degassing device.
Als Kalibriertisch, Abzugseinheit und automatische Säge wurden Geräte der Fa. Ide, Stuttgart eingesetzt.Devices from Ide, Stuttgart were used as the calibration table, take-off unit and automatic saw.
Für die Extrusionsdüse und Kalibriereinheit wurden übliche korrosions- und temperaturbeständige Stähle verwendet. Die Oberfläche der Kalibriereinheit mit indirekter Kühlung ist hochglanzpoliert.Conventional corrosion and temperature resistant steels were used for the extrusion die and calibration unit. The surface of the calibration unit with indirect cooling is highly polished.
Die beiden Kalibrierschalen können separat temperiert werden. Die Länge derThe two calibration dishes can be tempered separately. The length of the
Kalibrierstrecke beträgt ca. 115 mm. Danach erfolgt eine wietere Abkühlung im Wasserbad.Calibration distance is approx. 115 mm. This is followed by further cooling in a water bath.
Das Material war ein Polyamid vom Typ: Durethan KU2-2240/25 H2.0, (Hersteller Bayer AG) (PA 6.6 mit einem Anteil von 25 Gew.-% Glasfasern).The material was a polyamide of the type: Durethan KU2-2240 / 25 H2.0, (manufacturer Bayer AG) (PA 6.6 with a proportion of 25% by weight of glass fibers).
Das Polyamid wurde bei einer Temperatur von 273 °C extrudiert. Die Verarbeitungsbedingungen sind im einzelnen in Tabelle 1 aufgeführt. Dem Polyamid 6.6 waren als Treibmittel in der Einzugszone 2 Gew.-% Hydrocerol HK 70 (Treibmittel auf Basis Zitronensäure) zugesetzt worden. Das Polyamid unterlag einer Vortrocknung nach folgenden Bedingungen: Trocknungsparameter Temperatur: 110°C Zeit: 4 hThe polyamide was extruded at a temperature of 273 ° C. The processing conditions are listed in detail in Table 1. 2% by weight of Hydrocerol HK 70 (blowing agent based on citric acid) had been added to the polyamide 6.6 as blowing agent in the feed zone. The polyamide was subjected to predrying under the following conditions: Drying parameters temperature: 110 ° C time: 4 h
Trocknungsgerät Trockenlufttrockner der Fa. Gerco. Drying device dry air dryer from Gerco.
Tabelle 1Table 1
Prozessparameterprocess parameters
Für das fertige Profil wurden folgende Eigenschaften gemessen:The following properties were measured for the finished profile:
Dichte: 0,70 g/cm3 (1,24 g/cm3 nicht geschäumtes Profil)Density: 0.70 g / cm 3 (1.24 g / cm 3 non-foamed profile)
Wärmeleitfähigkeit: 0,26 W/mK (0,35 W/mK nicht geschäumtes Profil)Thermal conductivity: 0.26 W / mK (0.35 W / mK non-foamed profile)
In Klammern gesetzt sind die Werte für ein nicht geschäumtes Profil.The values for a non-foamed profile are in brackets.
Die Überlegenheit des geschäumten Profiles gegenüber einem Profil nach dem Stand der Technik wird hier deutlich. Fig. 1 zeigt schematisch das Profil 1 im Querschnitt. Hierbei sind die Poren 2 aus Gas über den gesamten Querschnitt verteilt. Zwei Profile 1 hergestellt nach dem oben genannten Verfahren werden in einem Aluminiumfensterralimen (siehe Fig. 2) zwischen den Rahmenteilen 3 und 4 montiert und durch Verpressen der Alu- mmiumführung fixiert. In der Anwendung ergibt sich ein verminderter Wärmeübergang zwischen den Rahmenteilen 3 und 4. The superiority of the foamed profile over a profile according to the prior art is clear here. Fig. 1 shows schematically the profile 1 in cross section. Here, the pores 2 of gas are distributed over the entire cross section. Two profiles 1 produced according to the above-mentioned method are mounted in an aluminum window frame (see FIG. 2) between the frame parts 3 and 4 and fixed by pressing the aluminum guide. In use, there is a reduced heat transfer between the frame parts 3 and 4.

Claims

Patentansprtiche Patentansprtiche
1. Extrusionsprofil auf Basis thermoplastischer Polymere, insbesondere Polyamid, besonders bevorzugt Polyamid 6.6, die insbesondere mit Glasfasern verstärkt sind und einen Anteil an Glasfasern von 15 bis 50 Gew.-%, besonders bevorzugt von 20 bis 30 Gew.-% Glasfasern enthalten, dadurch gekennzeichnet, dass die Dichte des Profilmaterials höchstens 1 g/cm3 beträgt und das Profil über den Querschnitt des Profils verteilte Poren mit einer mittleren Größe von etwa 0,1 bis 0,5 mm enthält.1. Extrusion profile based on thermoplastic polymers, in particular polyamide, particularly preferably polyamide 6.6, which are reinforced in particular with glass fibers and contain 15 to 50% by weight, particularly preferably 20 to 30% by weight, of glass fibers, thereby characterized in that the density of the profile material is at most 1 g / cm 3 and the profile contains pores distributed over the cross section of the profile with an average size of about 0.1 to 0.5 mm.
2. Extrusionsprofil nach Anspruch 1, dadurch gekennzeichnet, dass die Glasfasern Kurzglasfasern mit einer Länge von 200 bis 400 μm sind.2. Extrusion profile according to claim 1, characterized in that the glass fibers are short glass fibers with a length of 200 to 400 microns.
3. Extrusionsprofil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Dichte des Profilmaterials höchstens 1,0 g/cm3, bevorzugt höchstens 0,9 g/cm3, besonders bevorzugt höchstens 0,8 g/cm3 beträgt.3. Extrusion profile according to claim 1 or 2, characterized in that the density of the profile material is at most 1.0 g / cm 3 , preferably at most 0.9 g / cm 3 , particularly preferably at most 0.8 g / cm 3 .
4. Extrusionsprofil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Wärmeleitfähigkeit des Profils in Querrichtung gemessen höchstens 0,3 W/mK, insbesondere höchstens 0,25 W/mK, insbesondere bevorzugt höchstens 0,12 W/mK beträgt.4. Extrusion profile according to one of claims 1 to 3, characterized in that the thermal conductivity of the profile measured in the transverse direction is at most 0.3 W / mK, in particular at most 0.25 W / mK, particularly preferably at most 0.12 W / mK.
5. Extrusionsprofil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schmelzeviskosität des Basispolymeren bei 290°C und einer Schergeschwindigkeit von 50 sec-1 größer 2500 Pa.s beträgt.5. Extrusion profile according to one of claims 1 to 3, characterized in that the melt viscosity of the base polymer at 290 ° C and a shear rate of 50 sec -1 is greater than 2500 Pa.s.
6. Verfahren zur Herstellung von Extrusionsprofilen, insbesondere nach einem der Ansprüche 1 bis 5, auf Basis thermoplastischer Polymere, insbesondere Polyamid, besonders bevorzugt Polyamid 6.6, die insbesondere mit Glas- fasern verstärkt sind und einen Anteil an Glasfasern von 15 bis 50 Gew.-%, besonders bevorzugt von 20 bis 30 Gew.-% Glasfasern enthalten, durch Aufschmelzen des Polymeren und ggf. Zusatzstoffen, Extrudieren der Polymermasse unter Bildung eines Profilstrangs, Abkühlen und Ausformen des Profils in einem Kalibrator, Abziehen und weiteres Abkühlen des Profils in einem Kühlbad, dadurch gekennzeichnet, dass dem Polymeren vor dem Extrudieren ein gaserzeugendes Treibmittel in einer Menge von 0,1 bis6. Process for the production of extrusion profiles, in particular according to one of claims 1 to 5, based on thermoplastic polymers, in particular polyamide, particularly preferably polyamide 6.6, which are reinforced in particular with glass fibers and a proportion of glass fibers of 15 to 50% by weight. %, particularly preferably from 20 to 30% by weight of glass fibers Melting the polymer and any additives, extruding the polymer mass to form a profile strand, cooling and shaping the profile in a calibrator, stripping and further cooling the profile in a cooling bath, characterized in that the polymer has a gas-generating blowing agent in an amount before extrusion from 0.1 to
5 Gew.-% zugesetzt wird, wobei sich das Treibmittel bei einer Temperatur oberhalb von 180°C zersetzt und Aufschäumenlassen der Polymermasse nach dem Extrudieren.5 wt .-% is added, the blowing agent decomposing at a temperature above 180 ° C and allowing the polymer mass to foam after extrusion.
7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das gaserzeugende7. The method according to claim 6, characterized in that the gas generating
Treibmittel in einer Menge von 0,5 bis 2 Gew.-% zugesetzt wird.Blowing agent is added in an amount of 0.5 to 2 wt .-%.
8. Verfahren nach einem der Ansprüche 6 bis 1, dadurch gekennzeichnet, dass der Mengenstrom des Polymerstrangs vor dem Kalibrator gemessen und geregelt wird.8. The method according to any one of claims 6 to 1, characterized in that the mass flow of the polymer strand is measured and regulated in front of the calibrator.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass die Regelung des Mengenstroms über die Abzugsgeschwindigkeit des Profilstrangs erfolgt.9. The method according to claim 8, characterized in that the regulation of the flow rate takes place via the withdrawal speed of the profile strand.
10. Verfahren nach einem der Ansprüche 8 bis 9, dadurch gekennzeichnet, dass die Messung mittels eines IR- Absorptionssensors durchgeführt wird.10. The method according to any one of claims 8 to 9, characterized in that the measurement is carried out by means of an IR absorption sensor.
11. Verfahren nach einem der Ansprüche 6 bis 10, dadurch gekennzeichnet, dass die Schmelzeviskosität des verwendeten Polymeren bei 290°C mehr als 2500 Pa.s bei einer Schergeschwindigkeit von 50 sec-1 beträgt.11. The method according to any one of claims 6 to 10, characterized in that the melt viscosity of the polymer used at 290 ° C is more than 2500 Pa.s at a shear rate of 50 sec -1 .
12. Verwendung der Extrusionsprofile nach einem der Ansprüche 1 bis 6 als wärmedämmende Befestigungsstege insbesondere zur Herstellung von Fenstern auf Basis von Metallprofilen, bevorzugt Aluminiumprofilen. 12. Use of the extrusion profiles according to one of claims 1 to 6 as heat-insulating fastening webs, in particular for the production of windows based on metal profiles, preferably aluminum profiles.
EP02762469A 2001-09-13 2002-09-02 Extrusion profile and method of production thereof Withdrawn EP1427783A1 (en)

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US8617702B2 (en) 2010-04-28 2013-12-31 Sabic Innovative Plastics Ip B.V. Thermally insulated structural members, and doors and windows incorporating them
US8524806B2 (en) 2011-02-10 2013-09-03 Sabic Innovative Plastics Ip B.V. Profile extrusion method, article, and composition
WO2014125126A1 (en) * 2013-02-18 2014-08-21 Rockwool International A/S Insulated metal profile and its production
CN105111734B (en) * 2015-09-20 2018-07-03 北京蓝盾创展门业有限公司 A kind of use in construction of door and window heat insulating strip of inorganic fill nylon composite materials

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FR1460703A (en) * 1964-09-28 1966-03-04 Du Pont Manufacture of cellular or foamed plastic articles
US4022719A (en) * 1971-11-13 1977-05-10 Bridgestone Tire Company Limited Process for producing polyamide foam
JPS5876431A (en) * 1981-10-30 1983-05-09 Mitsubishi Gas Chem Co Inc Polyamide resin composition for expansion molding
BE1003696A3 (en) * 1990-03-26 1992-05-26 Solvay Articles having a uniform cellular structure and method for obtaining same
US5272182A (en) * 1992-12-03 1993-12-21 General Electric Company Blowing agent concentrate and compositions and article prepared therefrom

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