DE19520477A1 - Fibre-reinforced, thermally expanded thermoplastic sheet - Google Patents

Fibre-reinforced, thermally expanded thermoplastic sheet

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Publication number
DE19520477A1
DE19520477A1 DE1995120477 DE19520477A DE19520477A1 DE 19520477 A1 DE19520477 A1 DE 19520477A1 DE 1995120477 DE1995120477 DE 1995120477 DE 19520477 A DE19520477 A DE 19520477A DE 19520477 A1 DE19520477 A1 DE 19520477A1
Authority
DE
Germany
Prior art keywords
reinforced
fiber
thermoplastics
thermally expanded
thermoplastic
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Withdrawn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
DE1995120477
Other languages
German (de)
Inventor
Zopf Ing Ernst
Wolfram Dipl Ing Stadlbauer
Blauhut Dipl Ing Wilfried
Stockreiter Dipl Ing Wolfgang
Penz Wolfgang
Lehner Manfred
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.)
Borealis Polymere Holding AG
Original Assignee
Pcd Petrochemie Danubia Deutschland 81925 Muenchen De GmbH
DANUBIA PETROCHEM DEUTSCHLAND
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Filing date
Publication date
Application filed by Pcd Petrochemie Danubia Deutschland 81925 Muenchen De GmbH, DANUBIA PETROCHEM DEUTSCHLAND filed Critical Pcd Petrochemie Danubia Deutschland 81925 Muenchen De GmbH
Priority to DE1995120477 priority Critical patent/DE19520477A1/en
Publication of DE19520477A1 publication Critical patent/DE19520477A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/20—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics
    • E04C2/22—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics reinforced
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • 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
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/06—Making preforms having internal stresses, e.g. plastic memory
    • B29C61/0608—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms
    • B29C61/0658—Making preforms having internal stresses, e.g. plastic memory characterised by the configuration or structure of the preforms consisting of fibrous plastics material, e.g. woven
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/02—Thermal after-treatment

Abstract

Fibre-reinforced, thermally expanded thermoplastic sheet or board (I) is claimed. Also claimed is (i) a process for the prodn. of (I), by heating fibre-reinforced thermoplastic sheet or board above its m.pt., so that the material expands due to the restoring forces of the fibres; (ii) a multilayer component with supporting core(s) of (I) and at least one outer layer; (iii) a process for the prodn. of this component by pressing core(s) of (I) together with outer layer(s) in a press.

Description

Die Erfindung betrifft eine faserverstärkte, thermisch expandierte Thermoplast­ folie oder Thermoplastplatte, sowie ein unter Verwendung dieser Folie oder Platte hergestelltes Bauteil.The invention relates to a fiber-reinforced, thermally expanded thermoplastic foil or thermoplastic sheet, as well as one using this foil or Plate made component.

Aus der DE-OS 42 08 812 ist eine mehrschichtige Leichtbauplatte bekannt, die aus einem innenliegenden Stützkern mit Wabenstruktur und zwei außen­ liegenden Deckschichten aus Thermoplastfolien aufgebaut ist. Derartige Leichtbauplatten werden bevorzugt als Konstruktionsteile, beispielsweise im Kraftfahrzeug- oder Flugzeugbau oder für Bauwerke, verwendet und zeichnen sich vor allem durch ihre hohe Festigkeit und Steifigkeit bei gleichzeitig niedri­ ger Dichte aus. Der Nachteil dieser Platten liegt insbesondere in der aufwendi­ gen Herstellung des wabenförmig strukturierten Stützkerns.From DE-OS 42 08 812 a multi-layer lightweight board is known which consist of an internal support core with honeycomb structure and two outside lying top layers is made of thermoplastic films. Such Lightweight panels are preferred as construction parts, for example in Motor vehicle or aircraft construction or for buildings, used and drawing above all due to their high strength and rigidity combined with low density. The disadvantage of these plates is in particular the complex production of the honeycomb-structured support core.

Es stellte sich demnach die Aufgabe, weniger komplizierte Stützkerne bereit­ zustellen, sowie Bauteile zu finden, die einen einfacheren Stützkern enthalten, bei gleichzeitig zufriedenstellendem Eigenschaftsprofil für den jeweiligen Einsatzzweck, insbesondere im Hinblick auf niedere Dichte und hohe Stei­ figkeit.The task was therefore to provide less complicated support cores deliver, and to find components that contain a simpler support core, with a satisfactory property profile for each Intended use, especially with regard to low density and high stone ability.

Die Lösung der Aufgabe ergab sich in der Verwendung einer sehr einfach her­ zustellenden expandierten Thermoplastfolie oder -platte als Stützkern.The solution to the problem arose from using a very simple one Expanded thermoplastic film or plate to be delivered as a support core.

Gegenstand der Erfindung ist demnach eine faserverstärkte Thermoplastfolie oder Thermoplastplatte, die dadurch gekennzeichnet ist, daß sie thermisch ex­ pandiert ist.The invention accordingly relates to a fiber-reinforced thermoplastic film or thermoplastic sheet, which is characterized in that it thermally ex is pawned.

Als Folien- oder Plattenmaterial können alle thermoplastisch verformbaren Kunststoffe eingesetzt werden. Beispiele für derartige Thermoplaste sind z. B. Polyolefine, Polyamide, Polyester, Polystyrol, Styrol-Acrylnitril-Copolymere, Acrylnitril-Butadien-Styrol-Copolymere, thermoplastische Polyurethane und Polyester, Polyimide, Polysulfone, Polyetherketone, Polyetherimide, Polyether­ sulfone, Polyphenylensulfid. Bevorzugt verwendet werden Polyolefine, wie z. B. Polyethylene, Polypropylene oder Ethylen-Propylen-Copolymere. All can be thermoplastically deformed as film or plate material Plastics are used. Examples of such thermoplastics are e.g. B. Polyolefins, polyamides, polyesters, polystyrene, styrene-acrylonitrile copolymers, Acrylonitrile-butadiene-styrene copolymers, thermoplastic polyurethanes and Polyesters, polyimides, polysulfones, polyether ketones, polyetherimides, polyethers sulfones, polyphenylene sulfide. Polyolefins, such as, for. B. Polyethylene, polypropylene or ethylene-propylene copolymers.  

Die Faserverstärkung erfolgt beispielsweise in Form von Einzelfasern, als Ge­ webe, Vlies, Matte oder als unidirektional orientiertes Gelege. Entsprechend den geforderten mechanischen Eigenschaften sind als Verstärkungsfasern bei­ spielsweise Glasfasern, Kohlefasern, Aramidfasern, Cellulosefasern, Keramik­ fasern, Metallfasern, Naturfasern wie z. B. Hanf, Jute, Sisal, Kokos oder Synthesefasern wie z. B. Polyamid, Polyester, Viskose einsetzbar. Es erweist sich als vorteilhaft, Faserlängen von über 1 mm einzusetzen. Die Faserlängen liegen jedoch bevorzugt bei über 5 mm, besonders bevorzugt bei über 25 mm. Auch die Verwendung von Endlosfasern ist möglich.The fiber reinforcement takes place, for example, in the form of individual fibers, as Ge weave, fleece, mat or as unidirectionally oriented scrim. Corresponding the required mechanical properties are used as reinforcing fibers for example glass fibers, carbon fibers, aramid fibers, cellulose fibers, ceramics fibers, metal fibers, natural fibers such. B. hemp, jute, sisal, coconut or Synthetic fibers such as B. polyamide, polyester, viscose can be used. It turns out it is advantageous to use fiber lengths of over 1 mm. The fiber lengths however, are preferably over 5 mm, particularly preferably over 25 mm. The use of continuous fibers is also possible.

Die Herstellung der erfindungsgemäßen Folien oder Platten erfolgt dadurch, daß faserverstärkte Thermoplastplatten oder -folien durch Wärmezufuhr über den Schmelzpunkt des Thermoplasten erhitzt werden, wobei die Folien oder Platten aufgrund der Rückstellkräfte der Verstärkungsfasern, die im nunmehr nicht mehr erstarrten Thermoplasten nicht mehr zusammengedrückt werden, expandieren. Die Wärmezufuhr erfolgt beispielsweise in handelsüblichen Öfen oder Pressen, beispielsweise mittels üblicher Wärmeträgermedien, Heißluft, Infrarot- oder Hochfrequenzheizung. Die Expansionstemperatur liegt beispiels­ weise im Falle der Verwendung von Polypropylenen, die je nach Type Schmelztemperaturen von etwa 130 bis 169°C besitzen, bevorzugt bei etwa 180 bis 250°C.The films or plates according to the invention are produced by that fiber-reinforced thermoplastic sheets or films by applying heat the melting point of the thermoplastic are heated, the films or Plates due to the restoring forces of the reinforcing fibers, which are now no longer solidified thermoplastics are no longer compressed, expand. The heat is supplied, for example, in commercially available ovens or presses, for example using conventional heat transfer media, hot air, Infrared or high frequency heating. The expansion temperature is, for example wise in the case of the use of polypropylenes, depending on the type Have melting temperatures of about 130 to 169 ° C, preferably at about 180 to 250 ° C.

Bei der Expansion steigt die Dicke der Platte, vor allem in Abhängigkeit von der Art der Faserverstärkung bzw. von der Art der Vernadelung bei Verwendung von Vliesen oder Matten, etwa auf das 1,5- bis 5fache. Bei der Verwendung von beispielsweise handelsüblichen Vliesen oder Matten als Verstärkungsfa­ sern zur Herstellung der faserverstärkten Folien oder Platten nimmt die Dicke bei der Expansion ungefähr auf das 2- bis 3fache zu. Im Anschluß an die thermische Expansion wird die nunmehr vorliegende expandierte Struktur der Platten oder Folien durch Abkühlen unter die Schmelztemperatur stabilisiert.During the expansion, the thickness of the plate increases, especially depending on the Type of fiber reinforcement or type of needling when used of fleeces or mats, about 1.5 to 5 times. When using of commercially available nonwovens or mats as a reinforcement The thickness for the production of the fiber-reinforced foils or plates increases in expansion about 2 to 3 times. Following the thermal expansion becomes the now existing expanded structure of the Plates or foils stabilized by cooling below the melting temperature.

Die thermische Expansion der faserverstärkten Thermoplastplatten oder -folien kann entweder diskontinuierlich oder in kontinuierlichen Verfahren erfolgen. Besonders bevorzugt gelingt die thermische Expansion in einem kontinuierli­ chen Verfahren direkt im Anschluß an die Herstellung der faserverstärkten Platten oder Folien. Dabei werden, wie beispielsweise in der EP-B-0 345 463 beschrieben, der Thermoplast und die Faserverstärkung auf einer Doppelband­ presse bei Temperaturen über dem Schmelzpunkt des Thermoplasten konti­ nuierlich verpreßt und anschließend, ohne daß unter den Schmelzpunkt abge­ kühlt wird, aus der Doppelbandpresse abgezogen, wobei die nunmehr nicht mehr unter Druck stehenden Platten oder Folien im selben Arbeitsgang kontinuierlich expandieren und anschließend zur Stabilisierung der expandierten Struktur abgekühlt werden. Auf diese Weise können die erfindungsgemäßen expandierten Platten oder Folien sowohl in sehr einfacher Weise als auch sehr energiesparend hergestellt werden.The thermal expansion of the fiber-reinforced thermoplastic sheets or foils can be done either discontinuously or in continuous processes. The thermal expansion is particularly preferably carried out continuously Chen process directly after the manufacture of the fiber-reinforced Plates or foils. Here, as for example in EP-B-0 345 463 described, the thermoplastic and the fiber reinforcement on a double band  press at temperatures above the melting point of the thermoplastic pressed and then without abge below the melting point is cooled, withdrawn from the double belt press, but now not more pressurized plates or foils in the same operation expand continuously and then stabilize the expanded Structure can be cooled. In this way, the inventive expanded sheets or foils both in a very simple way and very be produced in an energy-saving manner.

Eine weitere Erhöhung der Expansion der erfindungsgemäßen Platten oder Foli­ en kann beispielsweise durch Einbringen von Gasen, wie z. B. Luft oder Stick­ stoff in die expandierenden heißen Platten oder Folien, beispielsweise mit Hilfe von Injektionsnadeln, oder durch Verwendung von Treibmitteln erzielt werden.A further increase in the expansion of the plates or foils according to the invention en can, for example, by introducing gases such. B. air or stick into the expanding hot plates or foils, for example with the help of injection needles, or by using propellants.

Die erfindungsgemäßen thermisch expandierten, faserverstärkten Thermoplast­ platten oder -folien besitzen gute Festigkeiten und Steifigkeit sowie eine ge­ ringe Dichte und werden bevorzugt zur Herstellung von mehrschichtigen Bauteilen mit guter Festigkeit und Steifigkeit bei gleichzeitig geringer Dichte verwendet.The thermally expanded, fiber-reinforced thermoplastic according to the invention plates or foils have good strength and rigidity as well as a ge rings density and are preferred for the production of multilayer Components with good strength and rigidity combined with low density used.

Ein weiterer Gegenstand der Erfindung ist demnach ein mehrschichtiges Bau­ teil, das mindestens einen thermoplastischen Stützkern und mindestens eine Deckschicht enthält, bei dem der Stützkern aus einer faserverstärkten, ther­ misch expandierten Thermoplastfolie oder Thermoplastplatte besteht.Another object of the invention is therefore a multi-layer structure part that has at least one thermoplastic support core and at least one Contains top layer, in which the support core from a fiber-reinforced, ther there is mixed expanded thermoplastic film or thermoplastic sheet.

Als Deckschichten kommen sowohl Platten oder Folien aus Kunststoffen als auch aus Metallen, vorzugsweise aus Aluminium in Frage. Als Kunststoffe sind sowohl Thermoplaste wie z. B. solche, die auch für den Stützkern eingesetzt werden, als auch Duroplaste, wie z. B. Melamin-, Harnstoff- oder Phenolharze, Polyurethane oder Polyester möglich. Bevorzugt werden Thermoplastplatten oder Thermoplastfolien als Deckschichten verwendet, die besonders bevor­ zugt, analog zum Stützkern ebenfalls faserverstärkt sind. Im Falle von Metall­ folien oder Duroplastfolien ist die Verwendung von Klebern oder Klebefolien zur Verbindung der Deckschichten mit den Stützkernschichten vorteilhaft. Der besondere Vorteil von Deckschichten aus Thermoplasten liegt insbesondere darin, daß sie durch Verschweißen ohne Verwendung von zusätzlichen Kleber­ schichten eine feste Verbindung mit dem Stützkern ergeben. Both sheets or foils made of plastics come as cover layers also made of metals, preferably aluminum. As plastics are both thermoplastics such as B. those used for the support core be, as well as thermosets such. B. melamine, urea or phenolic resins, Polyurethane or polyester possible. Thermoplastic sheets are preferred or thermoplastic films used as cover layers, especially before trains, are also fiber-reinforced analogous to the support core. In the case of metal foils or thermoset foils is the use of glue or adhesive foils advantageous for connecting the cover layers with the support core layers. Of the The particular advantage of cover layers made of thermoplastics lies in particular in that they can be welded without the use of additional glue layers result in a firm connection with the support core.  

Die erfindungsgemäßen Bauteile können auch aus mehr als 2 Schichten aufge­ baut sein, wobei beispielsweise abwechselnd ein Stützkern und eine Deck­ schicht angeordnet sind. Es ist auch möglich, zwei oder mehr Deckschichten oder zwei oder mehr Schichten von Stützkernen anzuordnen. Bevorzugt be­ steht das Formteil aus einem in der Mitte liegenden Stützkern und je einer oben und unten angeordneten äußeren Deckschicht. Es ist auch möglich, weitere Schichten mitzuverpressen, beispielsweise Klebefolien im Falle der Verwendung von Deckschichten aus Metallfolien oder Duroplastfolien oder elastische Zwischenschichten.The components according to the invention can also be made up of more than 2 layers builds, for example alternating a support core and a deck layer are arranged. It is also possible to have two or more top layers or to arrange two or more layers of support cores. Preferably be the molded part consists of a central support core and one each outer top layer arranged above and below. It is also possible, to co-compress further layers, for example adhesive films in the case of Use of cover layers made of metal foils or thermoset foils or elastic intermediate layers.

Die erfindungsgemäßen Bauteile liegen beispielsweise in Form von Platten, Profilen oder Formteilen vor und können beispielsweise als Schaltafeln, Ab­ deckungen oder Strukturbauteile im Automobilbau, wie z. B. Trennwände, Batteriekastenabdeckungen oder Reserveradabdeckungen verwendet werden.The components according to the invention are, for example, in the form of plates, Profiles or molded parts before and can for example as formwork panels, Ab covers or structural components in automotive engineering, such as B. partitions, Battery case covers or spare wheel covers can be used.

Die Herstellung der erfindungsgemäßen Bauteile erfolgt dadurch, daß ein oder mehrere Stützkerne aus einer faserverstärkten, thermisch expandierten Ther­ moplastfolie oder Thermoplastplatte gemeinsam mit mindestens einer Deck­ schicht in einer Presse oder mittels Walzen verpreßt werden. Im Falle der Ver­ wendung von thermoplastischen Deckschichten werden dabei beispielsweise eine oder mehrere heiße Lagen von oberen und unteren Deckschichten ge­ meinsam mit einer oder mehreren Lagen des erfindungsgemäßen thermisch expandierten, jedoch kalten Stützkerns gemeinsam in einer Formpresse ver­ preßt. Die dabei erhaltenen sandwichartig aufgebauten Bauteile weisen gute Festigkeiten und hohe Steifigkeit bei niedriger Dichte auf.The components according to the invention are produced in that one or several support cores from a fiber-reinforced, thermally expanded Ther plastic film or thermoplastic sheet together with at least one deck layer can be pressed in a press or by means of rollers. In the case of ver Use of thermoplastic cover layers are, for example one or more hot layers of top and bottom cover layers together with one or more layers of the thermal according to the invention expanded, but cold support core together in a molding press presses. The resulting sandwich-like components have good results Strengths and high rigidity with low density.

Beispiel 1example 1 Herstellung eines StützkernsProduction of a support core

Auf einer Doppelbandpresse wurden, wie beispielsweise in der EP-B-345 463 beschrieben, 2 Glasfasermatten mit einem Flächengewicht von je 620 g/m² (Faserlänge 100 mm, Fa. PPG) mit einem Propylen- Homopolymer (PP-Type Daplen® US 105A, Fa. PCD Polymere, MFI 50 g/10 min. gemäß ISO R1133 bei 230°C und 2,16 kg) bei 220°C und 3,7 mm Spaltbreite imprägniert. Die erhaltene faserverstärkte PP-Bahn, die einen Glasfaseranteil von 30 Gew.-% aufwies, wurde in der Kühlzone der Doppelbandpresse nur an der Oberfläche so weit abgekühlt, daß sich das oberflächlich erstarrte PP von den Stahlbän­ dern der Presse ablöste, wobei der Kern möglichst heiß belassen wurde. Nach dem Austreten aus der Doppelbandpresse wurde die PP-Bahn mittels IR-Strah­ lern weiter erhitzt, um auch die Oberfläche wieder über den Schmelzpunkt aufzuheizen, wobei sie aufgrund der Faserrückstellkräfte auf eine Dicke von etwa 10-12 mm expandierte. Anschließend wurde abkühlen gelassen, wobei die expandierte Struktur und die Bahndicke stabilisiert wurden. Die erhaltene, sehr voluminöse PP-Bahn mit einer Dichte von 0,34 kg/dm³ weist gute Festig­ keiten und Steifigkeit sowie einen homogenen Aufbau von Glasfaser zu PP- Matrix auf.On a double belt press, such as in EP-B-345 463 described, 2 glass fiber mats, each with a basis weight of 620 g / m² (Fiber length 100 mm, PPG) with a propylene homopolymer (PP type Daplen® US 105A, PCD Polymer, MFI 50 g / 10 min. according to ISO R1133 impregnated at 230 ° C and 2.16 kg) at 220 ° C and 3.7 mm gap width. The fiber-reinforced PP web obtained, which has a glass fiber content of 30% by weight in the cooling zone of the double belt press was only on the surface cooled so far that the superficially solidified PP from the steel strips replaced the press, leaving the core as hot as possible. To the PP web was exited from the double belt press by means of IR beam Learn further heated to also bring the surface back over the melting point heat up, due to the fiber restoring forces to a thickness of expanded about 10-12 mm. It was then allowed to cool, with the expanded structure and the web thickness have been stabilized. The received very voluminous PP sheet with a density of 0.34 kg / dm³ exhibits good strength stiffness and a homogeneous structure of glass fiber to PP Matrix on.

Beispiel 2Example 2 Herstellung eines Sandwich-FormteilsProduction of a sandwich molding

In eine auf 60°C (Werkzeugoberfläche) aufgeheizte Formpresse (Fa. Langzau­ ner) wurden zwischen zwei auf 220°C aufgeheizte glasmattenverstärkte PP- Folien mit einer Dicke von je 1,3 mm, einem Flächengewicht von je 1500 g/m² und einem Glasfaseranteil von 30 Gew.-% (entsprechend Daplen® TC-U30 von Fa. PCD Polymere), eine Lage des auf Raumtemperatur belassenen gemäß Bei­ spiel 1 erhaltenen Stützkerns (4150 g/m²) eingelegt und mit einer Preßkraft von 5 N/mm² verpreßt. Die Kavität des Werkzeugs wurde dabei so gewählt, daß die expandierte Struktur des kalten Stützkerns nicht zerstört wurde. Beim Preßvorgang bildete sich eine stabile Schweißverbindung zwischen den einzel­ nen Lagen aus. Das erhaltene Sandwich-Formteil besaß eine Dicke von 15 mm, ein Flächengewicht von 7150 g/m² und eine Dichte von 0,47 kg/dm³.In a molding press (Langzau.) Heated to 60 ° C (tool surface) ner) were between two heated to 220 ° C glass mat reinforced PP Foils with a thickness of 1.3 mm and a weight per unit area of 1500 g / m² and a glass fiber content of 30% by weight (corresponding to Daplen® TC-U30 from PCD Polymer), a layer of the one left at room temperature in accordance with game 1 obtained support core (4150 g / m²) inserted and with a pressing force of 5 N / mm². The cavity of the tool was chosen so that the expanded structure of the cold support core was not destroyed. At the Pressing process formed a stable weld between the individual layers. The sandwich molding obtained had a thickness of 15 mm, a weight per unit area of 7150 g / m² and a density of 0.47 kg / dm³.

Claims (10)

1. Faserverstärkte Folie oder Platte aus Thermoplasten, dadurch gekenn­ zeichnet, daß sie thermisch expandiert ist.1. Fiber-reinforced film or plate made of thermoplastics, characterized in that it is thermally expanded. 2. Faserverstärkte Folie oder Platte gemäß Anspruch 1, dadurch gekenn­ zeichnet, daß die Verstärkungsfasern eine Länge von über 5 mm, beson­ ders bevorzugt von über 25 mm aufweisen.2. Fiber-reinforced film or plate according to claim 1, characterized records that the reinforcing fibers have a length of over 5 mm, esp ders preferably have over 25 mm. 3. Faserverstärkte Folie oder Platte gemäß Anspruch 1 oder 2, dadurch ge­ kennzeichnet, daß die Thermoplaste Polypropylene sind.3. Fiber reinforced film or plate according to claim 1 or 2, characterized ge indicates that the thermoplastics are polypropylenes. 4. Verfahren zur Herstellung von faserverstärkten, thermisch expandierten Folien oder Platten gemäß einem der Ansprüche 1 bis 3, dadurch gekenn­ zeichnet, daß faserverstärkte Folien oder Platten aus Thermoplasten über ihren Schmelzpunkt erwärmt werden, wobei die Folien oder Platten auf­ grund der Rückstellkräfte der Verstärkungsfasern expandieren.4. Process for the production of fiber-reinforced, thermally expanded Films or plates according to one of claims 1 to 3, characterized records that fiber-reinforced films or sheets of thermoplastics their melting point are heated, leaving the foils or plates on expand due to the restoring forces of the reinforcing fibers. 5. Verfahren gemäß Anspruch 4, dadurch gekennzeichnet, daß aus einer Doppelbandpresse austretende faserverstärkte Folien oder Platten aus Thermoplasten ohne Abkühlung unter den Schmelzpunkt aus der Doppel­ bandpresse abgezogen werden, wobei sie expandieren.5. The method according to claim 4, characterized in that from a Double belt press exiting fiber-reinforced films or sheets Thermoplastics without cooling below the melting point from the double belt press are pulled off as they expand. 6. Mehrschichtiges Bauteil, das mindestens einen thermoplastischen Stütz­ kern und mindestens eine Deckschicht enthält, dadurch gekennzeichnet, daß der Stützkern aus einer faserverstärkten, thermisch expandierten Folie oder Platte aus Thermoplasten besteht.6. Multi-layer component that has at least one thermoplastic support core and contains at least one cover layer, characterized in that that the support core made of a fiber-reinforced, thermally expanded film or plate made of thermoplastics. 7. Bauteil gemäß Anspruch 6, dadurch gekennzeichnet, daß der Stützkern zwischen einer oberen und einer unteren Deckschicht angeordnet ist.7. Component according to claim 6, characterized in that the support core is arranged between an upper and a lower cover layer. 8. Bauteil gemäß Anspruch 6 oder 7, dadurch gekennzeichnet, daß die Deck­ schichten aus Folien oder Platten aus Thermoplasten bestehen, die bevor­ zugt faserverstärkt sind. 8. Component according to claim 6 or 7, characterized in that the deck layers of foils or sheets made of thermoplastics that exist before trains are fiber-reinforced.   9. Verfahren zur Herstellung von Bauteilen gemäß einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß ein oder mehrere Stützkerne aus einer fa­ serverstärkten, thermisch expandierten Thermoplastfolie oder Thermopla­ stplatte gemeinsam mit mindestens einer Deckschicht in einer Presse ver­ preßt werden.9. A method for producing components according to one of claims 6 to 8, characterized in that one or more support cores from a fa server-strengthened, thermally expanded thermoplastic film or Thermopla ver plate together with at least one top layer in a press be pressed. 10. Verwendung von faserverstärkten, thermisch expandierten Thermoplast­ folien oder Thermoplastplatten gemäß einem der Ansprüche 1 bis 5 zur Herstellung eines mehrschichtigen Bauteils.10. Use of fiber-reinforced, thermally expanded thermoplastic films or thermoplastic sheets according to one of claims 1 to 5 for Production of a multi-layer component.
DE1995120477 1995-06-03 1995-06-03 Fibre-reinforced, thermally expanded thermoplastic sheet Withdrawn DE19520477A1 (en)

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DE102014108112A1 (en) * 2014-06-10 2015-12-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for producing a composite component and composite component
EP3385069A1 (en) * 2017-04-03 2018-10-10 Quadrant Plastic Composites AG Method of forming a flat composite component and composite component produced in this way
EP3434458A1 (en) 2017-07-24 2019-01-30 Quadrant Plastic Composites AG Method for manufacturing a flat moulded part made of a fibre-reinforced, thermoplastic material and moulded product made from same
WO2020094671A1 (en) 2018-11-05 2020-05-14 Mitsubishi Chemical Advanced Materials Composites Ag Method for producing a thermoplastically deformable, fiber-reinforced flat semi-finished product
EP3680097A1 (en) 2019-01-10 2020-07-15 Quadrant Plastic Composites AG Method for producing a thermoplastically deformable fibre-reinforced flat semi-finished product
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USRE44893E1 (en) 2004-03-26 2014-05-13 Hanwha Azdel, Inc. Fiber reinforced thermoplastic sheets with surface coverings
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CN103517798A (en) * 2011-01-25 2014-01-15 奎德兰特塑料合成日本有限公司 Flexurally rigid laminated sheets, parts molded therefrom and method of fabrication and method of fabrication
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US11969984B2 (en) 2013-04-02 2024-04-30 Toray Industries, Inc. Sandwich laminate, sandwich structure and unified molded product using same and processes for producing both
WO2014162873A1 (en) * 2013-04-02 2014-10-09 東レ株式会社 Sandwich laminate, sandwich structure and unified molded product using same and processes for producing both
US11059261B2 (en) 2013-04-02 2021-07-13 Toray Industries, Inc. Sandwich laminate, sandwich structure and unified molded product using same and processes for producing both
DE102014108112A1 (en) * 2014-06-10 2015-12-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for producing a composite component and composite component
EP3385069A1 (en) * 2017-04-03 2018-10-10 Quadrant Plastic Composites AG Method of forming a flat composite component and composite component produced in this way
WO2018185090A1 (en) 2017-04-03 2018-10-11 Quadrant Plastic Composites Ag Method for producing a planar composite component and composite component produced thereby
JP2023002513A (en) * 2017-04-03 2023-01-10 ミツビシ ケミカル アドバンスド マテリアルズ コンポジッツ アーゲー Method for producing flat composite member and composite member produced thereby
CN111201132A (en) * 2017-04-03 2020-05-26 三菱化学先进材料塑料复合材料公司 Method for producing a flat composite component and composite component produced thereby
JP2020515442A (en) * 2017-04-03 2020-05-28 ミツビシ ケミカル アドバンスド マテリアルズ コンポジッツ アーゲーＭｉｔｓｕｂｉｓｈｉ Ｃｈｅｍｉｃａｌ Ａｄｖａｎｃｅｄ Ｍａｔｅｒｉａｌｓ Ｃｏｍｐｏｓｉｔｅｓ ＡＧ Method for manufacturing a flat composite member and composite member manufactured thereby
US11633939B2 (en) 2017-04-03 2023-04-25 Quadrant Plastic Composites, AG Method for producing a planar composite component and composite component produced thereby
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EP3434458A1 (en) 2017-07-24 2019-01-30 Quadrant Plastic Composites AG Method for manufacturing a flat moulded part made of a fibre-reinforced, thermoplastic material and moulded product made from same
WO2020094671A1 (en) 2018-11-05 2020-05-14 Mitsubishi Chemical Advanced Materials Composites Ag Method for producing a thermoplastically deformable, fiber-reinforced flat semi-finished product
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