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DE4111638A1 - Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic - Google Patents

Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic

Info

Publication number
DE4111638A1
DE4111638A1 DE4111638A DE4111638A DE4111638A1 DE 4111638 A1 DE4111638 A1 DE 4111638A1 DE 4111638 A DE4111638 A DE 4111638A DE 4111638 A DE4111638 A DE 4111638A DE 4111638 A1 DE4111638 A1 DE 4111638A1
Authority
DE
Germany
Prior art keywords
layer
activated
thermoplastic
layers
reinforced
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Withdrawn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
DE4111638A
Other languages
German (de)
Inventor
Giorgio Dr Greening
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.)
BASF SE
Original Assignee
BASF SE
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Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to DE4111638A priority Critical patent/DE4111638A1/en
Publication of DE4111638A1 publication Critical patent/DE4111638A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/146—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby one or more of the layers is a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/08—Reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/704—Crystalline
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/12—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2371/00—Polyethers, e.g. PEEK, i.e. polyether-etherketone; PEK, i.e. polyetherketone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/18—Aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

A process for the prodn. of multilayer boards (I) involves pressing together (A) a core layer, (B) outer layer(s) of partly crystalline, opt. reinforced thermoplastic and (C) layer(s) or thermosetting adhesive; the novelty is that layers (B) are pre-activated on the side facing (C) by (a) corona treatment of (b) applying a layer of amorphous thermoplastic. (A) consists of plastic-coated paper with a honeycomb structure, (B) is fibre- reinforced polyether-ketone (PEK) or polyether-sulphone (PES) and (C) is epoxy resin; (B) is activated by irradiation with electrons at 10-50 kV or by co-consolidation with PES film. Pref., (A) is a honeycomb core 3-100 mm thick, made of Nomex paper (RTM: plastic coated paper); (B) is 0.1-10 mm thick, reinforced with 40-70 vol.% glass, carbon or aramid fibre, and is activated by irradiation for 0.1-10 secs. with electrons at 20-30 kV or by hot-pressing at 5-25 bar with PES film etc.; layers are laminated for 20-1000 mins. in a press at 100-250 deg.C and up to 10 bar. USE/ADVANTAGE - (I) are useful for the prodn. of aircraft parts, railway coach walls and sports equipment, e.g. surf boards. Activation of partly crystalline thermoplastic (B) enables good bonding with honeycomb core (A) by means of thermosetting adhesive (

Description

Die Erfindung betrifft ein verbessertes Verfahren zur Herstellung einer Mehrschichtplatte ausThe invention relates to an improved method for producing a Multilayer board made of

A. einer Kernschicht,
B. mindestens einer Deckschicht aus einem teilkristallinen, gegebenen­ falls faserverstärkten, thermoplastischen Kunststoff,
verbunden durch
C. mindestens eine Klebschicht aus einem duroplastischen Kunststoff.A. a core layer,
B. at least one cover layer made of a partially crystalline, optionally fiber-reinforced, thermoplastic,
connected through
C. at least one adhesive layer made of a thermosetting plastic.

Duroplastische Kunststoffe, z. B. auf Basis von Epoxidharzen werden häufig als Klebschichten zum Verbinden von Honigwaben-Kernschichten mit Deck­ schichten aus duroplastischen Kunststoffen verwendet. Versucht man, Deck­ schichten aus teilkristallinen, thermoplastischen Kunststoffen mit der­ artigen Duromer-Klebern zu verbinden, so erhält man keine ausreichende Haftung.Thermosetting plastics, e.g. B. based on epoxy resins are common as adhesive layers for connecting honeycomb core layers to the deck layers of thermosetting plastics are used. Trying to deck layers of semi-crystalline, thermoplastic with the to connect like thermoset adhesives, you do not get sufficient Liability.

Da aber Deckschichten aus thermoplastischen Kunststoffen zu­ nehmend interessanter werden, stellte sich die Aufgabe, eine geeignete Methode zum Verkleben solcher Deckschichten mit einer Kernschicht zu entwickeln.But since top layers made of thermoplastic materials too The task of finding a suitable one became increasingly interesting Method for gluing such cover layers with a core layer too develop.

Es wurde gefunden, daß diese Aufgabe gelöst wird, wenn man die Deckschicht auf der der Klebeschicht zugewandten Seite vor dem Verpressen aktiviert. Dies kann entweder durch Coronabehandlung mit energiereichen Elektronen oder durch Aufbringen einer Schicht eines amorphen thermoplastischen Kunststoffs geschehen.It has been found that this problem is solved when the top layer activated on the side facing the adhesive layer before pressing. This can be done either by corona treatment with high-energy electrons or by applying a layer of an amorphous thermoplastic Plastic happen.

Die Kernschicht A weist vorzugsweise Honigwaben-Struktur auf. Bevorzugtes Material für die Honigwaben ist kunststoffbeschichtetes Papier (NOMEX®- Papier), es kann jedoch auch Aluminium oder Kunststoff, insbesondere ein temperaturbeständiger thermoplastischer Kunststoff verwendet werden. Grundsätzlich kann die Kernschicht auch massiv sein und z. B. aus Aluminium oder Stahl oder auch aus einem faserverstärkten Kunststoff bestehen. Die Kernschicht kann ferner schaumförmig sein und aus einem thermoplastischen Kunststoff, wie z. B. Polyethersulfon oder einem duroplastischen Kunst­ stoff, wie z. B. Polyimid oder Melamin/Formaldehyd-Harz bestehen. Die Dicke der Kernschicht kann zwischen 3 mm und 100 mm betragen. The core layer A preferably has a honeycomb structure. Preferred The material for the honeycomb is plastic-coated paper (NOMEX®- Paper), but it can also be aluminum or plastic, especially one temperature-resistant thermoplastic can be used. Basically, the core layer can also be solid and z. B. made of aluminum or steel or also consist of a fiber-reinforced plastic. The The core layer can also be foam-shaped and made of a thermoplastic Plastic, such as B. polyethersulfone or a thermosetting plastic fabric such as B. polyimide or melamine / formaldehyde resin. The fat the core layer can be between 3 mm and 100 mm.  

Die Deckschicht B ist ein thermoplastischer, teilkristalliner Kunststoff, der zweckmäßigerweise mit Fasern verstärkt ist. In Frage kommen Polyether­ ketone, Polyphenylensulfide, Polyimide, Polyester oder Polyamide. Der Faseranteil beträgt vorzugsweise 40 bis 70 Vol.%. Die Fasern können z. B. aus Glas, Kohlenstoff oder aromatischem Polyamid bestehen, sie sind bevor­ zugt in Vorzugsrichtungen orientiert oder liegen als Gewebe vor. Die Deck­ schicht ist im allgemeinen 0,1 bis 10 mm dick.The cover layer B is a thermoplastic, partially crystalline plastic, which is expediently reinforced with fibers. Polyethers come into question ketones, polyphenylene sulfides, polyimides, polyesters or polyamides. The The fiber content is preferably 40 to 70% by volume. The fibers can e.g. B. made of glass, carbon or aromatic polyamide, they are before moves in preferred directions or is available as fabric. The deck layer is generally 0.1 to 10 mm thick.

Bevorzugt sind Deckschichten aus temperaturbeständigen Kunststoffen mit einem Schmelzpunkt über 50°C, insbesondere über 100°C, die mit unidirek­ tionalen oder multidirektionalen Endlosfasern vestärkt sind. Derartige Faserverbundwerkstoffe können z. B. durch Tränken von Fasergelegen oder -geweben mit einer Lösung oder einer Schmelze des Thermoplasten herge­ stellt werden oder man stellt ein Hybridgarn, z. B. nach EP-B 1 50 599, aus Verstärkungsfasern und Thermoplastfasern her, das gegebenenfalls zu einem Gewebe versponnen wird. Dieses Gewebe wird dann durch Verpressen bei Temperaturen oberhalb des Schmelzpunktes des Thermoplasten zu einer Platte konsolidiert.Cover layers made of temperature-resistant plastics are preferred a melting point above 50 ° C, especially above 100 ° C, with unidirek tional or multidirectional continuous fibers are reinforced. Such Fiber composite materials can e.g. B. by soaking scrim or -woven with a solution or a melt of the thermoplastic be put or you put a hybrid yarn, z. B. according to EP-B 1 50 599 Reinforcing fibers and thermoplastic fibers, which may become one Fabric is spun. This tissue is then pressed through Temperatures above the melting point of the thermoplastic to form a plate consolidated.

Die Verbindung von Kernschicht A und Deckschicht(en) B erfolgt durch die Klebschicht C. Diese besteht aus einem duroplastischen Kunststoff, vor­ zugsweise einem Epoxidharz, Bismaleinimidharz oder Cyanatharz. Vor dem Verpressen der Schichten liegt der Duroplast im unausgehärteten Zustand vor, vorzugsweise als Klebefilm mit einem Flächengewicht zwischen 50 und 1000 g·m-2. Beim Verpressen, welches bei erhöhter Temperatur je nach Art des verwendeten Klebers, vorzugsweise zwischen 100 und 250°C vorgenommen wird, härtet der Duroplast aus und ermöglicht dadurch die Verbindung zwischen Kernschicht und Deckschicht(en).The core layer A and the top layer (s) B are connected by the adhesive layer C. This consists of a thermosetting plastic, preferably an epoxy resin, bismaleimide resin or cyanate resin. Before the layers are pressed, the thermoset is in the uncured state, preferably as an adhesive film with a basis weight between 50 and 1000 g · m -2 . When pressed, which is carried out at elevated temperature, depending on the type of adhesive used, preferably between 100 and 250 ° C, the thermoset hardens and thereby enables the connection between the core layer and the top layer (s).

Das Wesen der Erfindung besteht darin, daß die Deckschicht B vor dem Verpressen auf ihrer der Klebschicht C zugewandten Seite aktiviert wird. Dies kann auf zweierlei Weise geschehen:The essence of the invention is that the top layer B before Pressing is activated on its side facing the adhesive layer C. This can be done in two ways:

  • a) Die Coronabehandlung von Oberflächen mit energiereichen Elektronen ist an sich bekannt. Durch den Elektronenbeschuß wird die Oberfläche angegriffen und oxidiert, dadurch wird die Oberflächenspannung des thermoplastischen Kunststoffs erhöht. Die Behandlung kann mit den einschlägigen Geräten erfolgen, z. B. mit einem Generator der Serie 5000 der Fa. SOFTAL.
    Die Spannung der Elektronenstrahlen beträgt bevorzugt 10 bis 50, ins­ besondere 20 bis 30 kV. Die Bestrahlungsdauer beträgt bevorzugt 0,1 bis 10 sec.     a) The corona treatment of surfaces with high-energy electrons is known per se. The surface is attacked and oxidized by electron bombardment, which increases the surface tension of the thermoplastic. The treatment can be done with the relevant equipment, e.g. B. with a generator of the 5000 series from SOFTAL.
    The voltage of the electron beams is preferably 10 to 50, in particular 20 to 30 kV. The irradiation time is preferably 0.1 to 10 seconds.
  • b) Auf die Oberfläche der Deckschicht wird eine Schicht eines amorphen thermoplastischen Kunststoffes aufgebracht. Dies kann aus Lösung oder vorzugsweise aus der Schmelze erfolgen. Besonders bevorzugt ist das Co-Konsolidieren von Deckschicht mit der Schicht des amorphen Thermo­ plasten durch Verpressen bei einem Druck zwischen 5 und 25 bar, ober­ halb der Schmelzpunkte beider Thermoplasten, wobei diese sich an der Grenzfläche physikalisch durchmischen. Diese Arbeitsweise ist beson­ ders geeignet, wenn die Deckschicht aus einem Hybidgarngelege oder -gewebe besteht, welches bei der Konsolidierung zur Deckschicht geformt wird.
    Wesentlich ist, daß die Zwischenschicht aus einem amorphen Thermo­ plasten besteht, der beim Verkleben mit der Klebschicht C sich im Duroplasten lösen bzw. sich mit diesem vermischen kann. Die amorphen Thermoplasten sollten einen Schmelzpunkt über 50°, vorzugsweise über 100° aufweisen. Geeignet sind z. B. Polyethersulfone, amorphe Poly­ etherimide und amorphe Polyimide. Die Zwischenschicht kann 50 bis 500, insbesondere 100 bis 300 g·m-2 schwer sein.    b) A layer of an amorphous thermoplastic is applied to the surface of the cover layer. This can be done from solution or preferably from the melt. Co-consolidation of the top layer with the layer of the amorphous thermoplastic is particularly preferred by pressing at a pressure between 5 and 25 bar, above half the melting point of both thermoplastics, these physically mixing at the interface. This procedure is particularly suitable if the cover layer consists of a hybrid yarn scrim or fabric which is formed into the cover layer during consolidation.
    It is essential that the intermediate layer consists of an amorphous thermoplastic which can dissolve or mix with the thermoset when it is glued to the adhesive layer C. The amorphous thermoplastics should have a melting point above 50 °, preferably above 100 °. Are suitable for. B. polyether sulfones, amorphous poly etherimides and amorphous polyimides. The intermediate layer can be 50 to 500, in particular 100 to 300 g · m -2 in weight.

Das Verbinden der Schichten erfolgt durch Verpressen oberhalb der Härtungstemperatur des Duroplasten. Bevorzugt sind Temperaturen zwischen 100 und 250°C, Drücke bis zu 10 bar und Härtungszeiten zwischen 20 und 1000 min. Das Verpressen kann in Autoklaven oder üblichen Pressen vor­ genommen werden.The layers are connected by pressing above Curing temperature of the thermoset. Temperatures between are preferred 100 and 250 ° C, pressures up to 10 bar and curing times between 20 and 1000 min. The pressing can be done in autoclaves or conventional presses be taken.

Die erfindungsgemäß hergestellten Mehrschichtplatten können für Flugzeug­ teile, Eisenbahnwaggonwände und Sportgeräte, z. B. Surfbretter verwendet werden.The multilayer boards produced according to the invention can be used for aircraft parts, railroad car walls and sports equipment, e.g. B. surfboards used will.

Beispiel 1example 1 Kernschicht ACore layer A

Honigwabe aus phenolharzgebundenem NOMEX®-Papier, Typ 3,2-48 der Fa. Eurocomposites, 15 mm dick.Honeycomb made of phenolic resin-bound NOMEX® paper, type 3.2-48 der Eurocomposites, 15 mm thick.

Deckschicht BTop layer B

Hybridgarngewebe aus 65 Gew.-% AS4-Kohlenstoffasern und 35 Gew.-% Polyetherketon VICTREX® PEEK mit einem Flächengewicht von 245 g·m-2 wurde mit einer Polyethersulfonfolie (ULTRASON® S), Flächengewicht 200 g·m-2, zusammen bei 410°C, 10 bar 60 min lang in einem Autoklaven nach der Vakuumsackmethode verpreßt. Hybrid yarn fabric made of 65% by weight of AS4 carbon fibers and 35% by weight of VICTREX® PEEK polyether ketone with a basis weight of 245 g · m -2 was combined with a polyether sulfone film (ULTRASON® S), basis weight 200 g · m -2 410 ° C, 10 bar pressed for 60 min in an autoclave according to the vacuum bag method.

Klebschicht CAdhesive layer C

Serie a: Epoxidharzkleber METLBOND® 1113, Flächengewicht 300 g·m-2.Series a: epoxy resin adhesive METLBOND® 1113, basis weight 300 g · m -2 .

Serie b: Epoxidharzkleber METLBOND 1515-3, Flächengewicht 300 g·m-2.Series b: epoxy resin adhesive METLBOND 1515-3, basis weight 300 g · m -2 .

Die Schichten wurden aufeinandergelegt in einem Vakuumsack verpackt und im Fall a) in einem Autoklaven bei 120°C, 3 bar, 90 min lang verpreßt. Im Fall b) wurde in einem Autoklaven bei 180°C, 3,7 bar, 60 min lang ausge­ härtet. Die Aufheiz- und Abkühlgeschwindigkeit betrug in beiden Fällen 3°C/min.The layers were stacked in a vacuum bag and packed in the Case a) pressed in an autoclave at 120 ° C, 3 bar, for 90 min. in the Case b) was carried out in an autoclave at 180 ° C., 3.7 bar, for 60 minutes hardens. The heating and cooling rate was in both cases 3 ° C / min.

Beispiel 2Example 2

Beispiel 1 wurde wiederholt, bei der Herstellung der Deckschicht wurde jedoch das Hybridgarngewebe ohne Polyethersulfonfolie konsolidiert. Die konsolidierte Schicht wurde mit einem Generator 5000, Fa. SOFTAL, 1,5 sec lang einer Coronabehandlung (15 kV) unterworfen, wobei die Oberflächen­ spannung der Deckschicht einen Wert von 55 dyn·cm-1 erreichte.Example 1 was repeated, but in the preparation of the cover layer the hybrid yarn fabric was consolidated without polyether sulfone film. The consolidated layer was subjected to a corona treatment (15 kV) for 1.5 seconds using a SOFTAL 5000 generator, the surface tension of the outer layer reaching a value of 55 dyn · cm -1 .

Vergleichsbeispiel 3Comparative Example 3

Beispiel 2 wurde wiederholt, die Deckschicht wurde jedoch keiner Coronabehandlung unterworfen.Example 2 was repeated, but the top layer did not become one Subjected to corona treatment.

Prüfungexam

Die Haftung der Schichten wurden durch den Schältest nach IGC 04.26.270 D gemessen. Folgende Ergebnisse wurden erhalten:The adhesion of the layers was determined by the peel test according to IGC 04.26.270 D. measured. The following results were obtained:

Claims (9)

1. Verfahren zur Herstellung einer Mehrschichtplatte aus
  • A. einer Kernschicht,
  • B. mindestens einer Deckschicht aus einem teilkristallinen, gegebenenfalls faserverstärkten, thermoplastischen Kunststoff,
1. Process for the production of a multilayer board
  • A. a core layer,
  • B. at least one cover layer made of a partially crystalline, optionally fiber-reinforced, thermoplastic,
verbunden durch
  • C. mindestens eine Klebschicht aus einem duroplastischen Kunststoff,
connected through
  • C. at least one adhesive layer made of a thermosetting plastic,
durch Verpressen der Schichten, dadurch gekennzeichnet, daß die Deck­ schicht B auf der der Klebschicht C zugewandten Seite vor dem Ver­ pressen
  • a) entweder durch Coronabehandlung mit energiereichen Elektronen, oder
  • b) durch Aufbringen einer Schicht eines amorphen thermoplastischen Kunststoffs
by pressing the layers, characterized in that the cover layer B press on the side facing the adhesive layer C before the Ver
  • a) either by corona treatment with high-energy electrons, or
  • b) by applying a layer of an amorphous thermoplastic
aktiviert wurde.was activated. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kern­ schicht A Honigwabenstruktur aufweist und aus kunststoffbeschichtetem Papier besteht.2. The method according to claim 1, characterized in that the core layer A has a honeycomb structure and made of plastic-coated Paper exists. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Deck­ schicht B aus faserverstärktem Polyetherketon oder Polyethersulfon besteht.3. The method according to claim 1, characterized in that the deck layer B made of fiber-reinforced polyether ketone or polyether sulfone consists. 4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kleb­ schicht C aus einem Epoxidharz besteht.4. The method according to claim 1, characterized in that the adhesive Layer C consists of an epoxy resin. 5. Verfahren nach Anspruch l, dadurch gekennzeichnet, daß die Deckschicht durch Bestrahlen mit Elektronen einer Spannung zwischen 10 und 50 kV aktiviert wird.5. The method according to claim l, characterized in that the cover layer by irradiation with electrons with a voltage between 10 and 50 kV is activated. 6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Deckschicht durch Cokonsilidieren mit einer Polyethersulfonfolie aktiviert wird.6. The method according to claim 1, characterized in that the cover layer is activated by coconsilidation with a polyether sulfone film.
DE4111638A 1991-04-10 1991-04-10 Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic Withdrawn DE4111638A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4111638A DE4111638A1 (en) 1991-04-10 1991-04-10 Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4111638A DE4111638A1 (en) 1991-04-10 1991-04-10 Multilayer board with honeycomb core and thermoset adhesive layers - has outer layers of partly crystalline thermoplastic activated by corona treatment or application of amorphous thermoplastic

Publications (1)

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DE4111638A1 true DE4111638A1 (en) 1992-10-15

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953439A2 (en) * 1998-04-28 1999-11-03 Japan Aircraft Mfg. Co., Ltd Honeycomb panel and manufacturing method thereof
FR2826311A1 (en) * 2001-06-26 2002-12-27 Nidaplast Honeycombs CORE OF POLYOLEFIN HONEYCOMB TYPE, COMPOSITE PANEL OR SANDWICH AND MANUFACTURING METHOD
WO2006134079A1 (en) * 2005-06-15 2006-12-21 Antoine Antoine Composite part such as a panel, comprising a honeycomb structure
WO2009083494A1 (en) * 2007-12-21 2009-07-09 Sonaca S.A. Method for making a panel including at least one cellular body and a first skin made of a composite material
US20220032573A1 (en) * 2018-11-19 2022-02-03 Bright Lite Structures Llc High-strength low-heat release composites

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953439A2 (en) * 1998-04-28 1999-11-03 Japan Aircraft Mfg. Co., Ltd Honeycomb panel and manufacturing method thereof
EP0953439A3 (en) * 1998-04-28 2001-08-22 Japan Aircraft Mfg. Co., Ltd Honeycomb panel and manufacturing method thereof
FR2826311A1 (en) * 2001-06-26 2002-12-27 Nidaplast Honeycombs CORE OF POLYOLEFIN HONEYCOMB TYPE, COMPOSITE PANEL OR SANDWICH AND MANUFACTURING METHOD
EP1270198A1 (en) * 2001-06-26 2003-01-02 Nidaplast-Honeycombs Honeycomb core, directly bondable to an external facing, composite panel comprising such a core, and its manufacturing process
WO2006134079A1 (en) * 2005-06-15 2006-12-21 Antoine Antoine Composite part such as a panel, comprising a honeycomb structure
FR2887174A1 (en) * 2005-06-15 2006-12-22 Antoine Antoine COMPOSITE PIECE SUCH AS A PANEL, COMPRISING AN ALVEOLAR STRUCTURE WITH A BEES NIDS
WO2009083494A1 (en) * 2007-12-21 2009-07-09 Sonaca S.A. Method for making a panel including at least one cellular body and a first skin made of a composite material
BE1017910A3 (en) * 2007-12-21 2009-11-03 Sonaca Sociutu Anonyme METHOD FOR MANUFACTURING A PANEL COMPRISING AT LEAST ONE NANNED BODY AND A FIRST SKIN REALIZED IN COMPOSITE MATERIAL
US9662853B2 (en) 2007-12-21 2017-05-30 Sonaca S.A. Process for manufacturing a panel comprising at least one honeycomb body and a first skin made from a composite material
US20220032573A1 (en) * 2018-11-19 2022-02-03 Bright Lite Structures Llc High-strength low-heat release composites
US12053963B2 (en) * 2018-11-19 2024-08-06 Bright Lite Structures Llc High-strength low-heat release composites

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