EP3487698A1

EP3487698A1 - Sandwich component, method for producing a sandwich component, and use of a sandwich component

Info

Publication number: EP3487698A1
Application number: EP17734350.6A
Authority: EP
Inventors: Thomas Wolf; Patrick Steiner; Anton Brandmair; Philipp HUG; Thomas Frey
Original assignee: Nolax AG
Current assignee: Nolax AG
Priority date: 2016-07-25
Filing date: 2017-07-04
Publication date: 2019-05-29
Also published as: WO2018019524A1; EP3275645A1; US20190232602A1; CN109476120B; CA3031223A1; CN109476120A; US11472154B2; JP2019529155A

Abstract

The invention relates to a sandwich component comprising (i) a first main surface with a first cover layer and a second main surface with a second cover layer, said first cover layer and/or second cover layer having an opening, weakening, or marking and/or being provided with an opening, weakening, or marking in the lateral region, (ii) at least one intermediate layer, said intermediate layer being positioned between the first cover layer and the second cover layer, and (iii) a polymer composition which is arranged between the first and the second cover layer substantially within the intermediate layer and/or in the region of the opening, weakening, or marking. A mechanical connection means is fixed or can be fixed directly in the polymer composition through the first cover layer and/or the second cover layer and/or in the lateral region in the region of the opening, weakening, or marking, in particular so as to pass through the first cover layer and/or the second cover layer and/or the lateral region.

Description

Sandwich component, method for the production of a sandwich component and use of a sandwich component

The invention relates to a sandwich component, method for manufacturing position of a sandwich component, a kit and a method for connecting a sandwich component according to the independent Ansprü ^¬ chen.

As a construction method, the sandwich design refers to a form of lightweight construction, in which the components consist of force-absorbing fes ^¬ th cover layers, which are held by a relatively soft, usually lightweight, core material (intermediate layer) at a distance. These parts are very flexible and bulky at low weight. Their calculation is made in the construction industry according to the linear sandwich theory. The core may consist of paper honeycomb, metal honeycombs, in particular aluminum honeycombs, foams, for example hard foam, mineral wool or balsa wood. It transmits occurring shear forces and supports the cover layers. Often the heat-insulating and acoustic insulation properties of the very light core materials are used. As cover layers are, inter alia, sheet metal, metals such as aluminum, chromium-nickel / galvanized steel, fiber composites; Plastics such as polyp ^¬ ropylene (PP), polyvinyl chloride (PVC), polysulfone (PS), Po ^¬ lyurethan (PUR); Fiber-reinforced plastics such as glass reinforced plastic (GRP), aramid, carbon fiber reinforced

Plastic (CFRP); Wood materials, such as (blocked) wood, high-density Fa ^¬ serplatten (HDF); mineral materials, in particular glass; Stone used. Often, force ^{application points are} provided with reinforcements.

In commercial solutions with reinforcements, for example so-called inserts, which are introduced into the sandwich structure, or so-called onserts, which on the sandwich structure be applied, there is a fundamental difference in terms of power transmission between the transmission of power from the mechanical connection means on the insert or onsert and the power transmission from the insert or onsert on the eigent- liehe component.

In GB 973 559 A, an insert is positioned in a sandwich structure and then a liquid resin is applied, which fixes the insert after curing. A major disadvantage of this method is that the insert and / or the hole in the sandwich structure must be designed so that the insert can be kept in the planned position until the resin has cured. Furthermore, the use of an insert and a resin involves a high level of material expenditure with this method.

Next exhibit selective commercial force applications in lightweight materials in particular blind fasteners in sandwich panels ^¬ or sandwich component ends disadvantage that the insert or onsert for the force application must be introduced manually because automation is expensive. This leads to high process costs and low process reliability. Furthermore, it is disadvantageous that the product design and the flexibility of the components are strongly limited by manufacturers by standardized connecting means.

A disadvantage of known solutions is also that the possible load values are limited, especially in sandwich components, since the application of force can often not be optimally derived on the two supporting cover layers surface.

It is therefore an object of the invention to overcome the disadvantages of the prior art. In particular, it is an object of Invention to provide a sandwich component, which allows an op ^¬ timed force application and / or power dissipation in the bearing cover layers. Furthermore, it is in particular on ^¬ handover of the invention to provide an automated method and / or a situational inserting or attaching an introduction of forces ^¬ Tenden and / or kraftableitenden element in a sandwich component.

These tasks are solved by the features of the independent claims.

The invention relates to a sandwich component, which comprises a first major surface with a first cover layer and a second Hauptflä ^¬ surface with a second topsheet. These are in particular a first cover plate and a second cover plate. The first

Cover layer and / or the second cover layer has an opening, Schwä ^¬ tion or marking and / or in the side area, in particular in a cover, an opening, weakening or marking is provided. The sandwich component has at least one intermediate layer, wherein the intermediate view between the first

Cover layer and the second cover layer is positioned. In the interim ^¬ rule layer has a particular injected, and preferably cross-linked polymer composition for forming an insert is arranged, which is arranged between the first topsheet and the second topsheet and substantially within the intermediate layer and / or in the region of the opening, weakening or marker. Here, a mechanical connecting means through the first cover layer and / or the second cover layer and / or in the side area, in particular the cover, in the region of the opening, weakening or marking, in particular by the first cover layer and / or the second cover layer and / or the side region , in particular the cover, projecting through, directly fixed or fixable in the polymer composition. The main surfaces of the sandwich component are the flat sides, which are not formed by the intermediate layer. The main surfaces thus correspond to the surfaces of the cover layers, which point away from the intermediate layer. The side region or the side regions of the sandwich component is understood to be the region or regions which are formed by the cover layers and the intermediate layer.

Under a cover is preferably understood a plate, a rail or a sandwich component. The cover is preferably arranged or can be arranged on one side of the sandwich component according to the invention such that the opening, weakening or marking is arranged in a region of the laterally exposed intermediate layer.

Is understood to mean "directly" means that the connecting means is in direct contact with the polymer composition, and not, for example, of a separate insert in the polymer to ^¬ composition is by fixed or fixed.

By "fixed" is meant here and below that the bonding agent is incorporated or attached in or on the polymer composition. "Fixable" is understood here and below to mean that the bonding agent can be introduced into or attachable to the polymer composition.

In this way, a sandwich component is provided wel ^¬ ches various mechanical connections, for example. Can accommodate various types of screws or thread types. The insert need not be matched here, as in commercially available metal or plastic inserts to a defined screw or mechanical Verbin ^¬ dung medium. By matching the properties of the polymer composition and insert geometry can the physical properties of the force application point and thus of the component are optimized. Furthermore, the hardness and elastic properties within a port ^¬ point can be set, and thus optimized force trans- mission into the component structures to achieve. This is particularly advantageous for dynamic loads. Furthermore, it is advantageous that, depending on the polymer composition, increased input and Ausdrehwiederstände (torques) can be achieved over conventional fixations in metal and Kunststoffinserts NEN. By eliminating the metal or plastic insert in the sandwich component according to the invention, it is possible to reduce the number of boundary layers and thus the risk of defects in adhesion and / or corrosion. The connecting means may be selected from the group umfas ^¬ send screw, threaded rod, clip, pins, bushes, sleeves, spacers, pencils, nail, hook, clip, spring, rivets, dowels, profiles, plates, hinges, magnets. The bonding agent may be pre-positioned prior to incorporation of the polymer composition and molded or overmolded with the polymer composition or may be incorporated or attached to the polymer composition after solidification of the polymer composition.

The polymer composition can be selected according to the formulations disclosed in EP 2 589 478 A1. These are incorporated by reference. In particular, the polymer composition is an adhesive having the following properties. The adhesive is preferably a fast-curing two-component adhesive based on polyurea as described in EP 1 958 975 B1 or EP 2 871 194. These are incorporated by reference. Preferably, the polymer composition comprises a isocyanathal- term component A and an amine-containing component B. The component A Comp ^¬ contains an isocyanate-terminated prepolymer having an isocyanate functionality of> 1.7, preferably of 1.7 <f o _NC <3, more preferably in the range of 2 to 3. Component B contains at least one di- and / or polyamine, preferably a polyether diamine and / or polyetherpolyamine. The stoichiometric ratio of isocyanate groups in component A to amine groups in component B in this case is 0.5 to 1.2, more preferably 1.

Particularly preferably, the polymer composition comprises an ERS ^¬ th component A and a second component B. Component A contains a monomeric polyisocyanate particular monomeric

Diisocyanate and an isocyanate-terminated prepolymer and / or a prepolymer mixture having an isocyanate functionality ^ 1.7, preferably in the range of 1.7 <f _NC o <3, more preferably in the range of 2 <f _NC o <3. The second component B contains a di and / or polyamine, in particular a polyetherdiamine and / or a polyetherpolyamine; and a trimerization catalyst. The stoichiometric ratio of isocyanate groups in the first component A to isocyanate-reactive hydrogen atoms in the composition in the second component B is 7.5 to 25, preferably 10 to 20, particularly preferably 15. Thus, a two-component polymer composition is used which is formed in a first step via a reaction of the excess monomeric polyisocyanate (in particular of the diisocyanate) with the polyamine, a second prepolymer gebil ^¬ det. This reaction is highly exothermic. At the same time, the isocyanate-terminated prepolymer of component A is crosslinked by amines provided in component B. The reaction progresses, it comes under the influence of a ^¬ relevant catalysts, particularly potassium octoate, mainly to a trimerization of the existing isocyanate groups. Thus, compared to conventional polyurethane and polyurea adhesives, the polymer composition has both higher tensile strength and heat resistance and higher impact strength than other high strength adhesives such as epoxy resins.

In principle, other two-component, thermoset-curing adhesives based on polyurethane, epoxy or acrylate can be used. The adhesive is referred to as liquid in the intended order condition at a viscosity of

<10000 mPas, preferably <300 mPas, ideally <100 mPas (ge ^¬ measured in the mixing head of the applicator at 35 ° C-65 ° C, preferably 50 ° C and a pressure of 70-140 bar, preferably 100 bar). The ^¬ se mixed viscosity can components by selecting the temperature of the com- further optimized.

Curing in this context refers to the chemical solidification of the adhesive by polymerization, condensation and addition. Such a rapidly especially chemically setting, structurally resilient polymer composition will be riding ^¬ found.

The opening may be selected from the group slot, bore, in particular circular bore. These can be introduced mechanically by drilling, milling, punching, slitting, perforating, lasering, grinding, cutting, chemical or thermal. In this case, an opening, a plurality of openings, a plurality of comparatively small openings which round, square or slit ^{¬ be} designed. Freeforming is also possible. In this way, the polymer composition can be introduced particularly advantageously into the intermediate layer. By choosing the opening as a non-circular opening, for example as a slot, a connection point is provided which ensures a positive connection as a security against rotation of the solidified polymer composition. In this way, greater forces can be absorbed.

When choosing the opening as small, narrow openings, a concealed mounting can be made possible.

The sandwich component, a honeycomb panel, preferably a tall Me ^¬ honeycomb panel, particularly preferably an aluminum honeycomb plate, a plastic core honeycomb plate, a wood-based honeycomb panel may be a foam core board or a fiber core plate.

The cover layers may preferably be selected from metals such as aluminum, chrome-nickel / galvanized steel; Plastics such as polyp ^¬ ropylene (PP), polyvinyl chloride (PVC), polysulfone (PS), Po ^¬ lyurethan (PUR); fiber reinforced plastics such as glass fiber reinforced plastic (GRP), aramid, carbon fiber reinforced plastic (CFRP); Wood-based materials such as plywood, high-density fibreboard (HDF); mineral materials, in particular glass; Stein The intermediate layer may preferably be selected from honeycomb, ribs, webs, such as cardboard, plastic, metal, fiber composite material, wood material, foam material, fiber material and bulk material of plastics such as polyvinyl ^¬ chloride (PVC), polyethylene terephthalate (PET ), Polymethacrylamide (PMI), expanded polystyrene (EPS), extruded polystyrene foam (XPS), recycled material, wood-based materials such as balsa wood, soft fiber, chipboard, composite material, tube chip, lightweight solid wood board; Glass; Stone; Metals like aluminum. The polymer composition may be configured such that the polymer composition forms an undercut. In this case, the undercut is preferably formed on the first cover layer and / or the second cover layer, particularly preferably on the surface of the first cover layer facing the intermediate layer and / or the second cover layer. Thus, a positive connection between the polymer composition and the first and / or the second cover layer can be formed, so that particularly strong forces can be introduced and discharged to the cover layers.

Furthermore, the polymeric composition can be designed such that there is a cohesive, that is adhesive, and / or form-fitting ^¬ and / or force-locking connection is formed. The metallurgical joint is preferably formed between the polymer to ^¬ composition and the intermediate vision and / or the first cover layer and / or the second cover layer. Also by this design ^¬ out particularly strong forces are introduced and derived on the cover layers.

Another aspect of the invention relates to a method for producing a sandwich component, in particular as explained above, with at least one insert and / or onsert of a crosslinkable polymer composition. The method comprising comprises the step of providing a sandwich component a ers ^¬ te cover layer and a second cover layer, in particular a first layer and a second cladding layer. The first cover layer and / or the second cover layer and / or a cover on one side of the sandwich component has an opening, weakening or marking. The sandwich component has at least one interim ^¬ rule of the first topsheet and the second topsheet positioned on the intermediate layer. The method further comprises the steps of introducing, in particular injecting, a crosslinkable polymer composition at the location of the marking or weakening or through the opening in the first cover layer and / or the second cover layer and / or the cover into the intermediate layer, and solidifying the polymer composition between the cover layers such that a mechanical connecting means protrudes through the first cover layer and / or the second cover layer and / or the cover in the region of the opening, weakening or marking, in particular through the first and / or the second cover layer and / or the cover , is fixable directly in the polymer composition. Thus, a method is provided with which in a fast process insert and onsert solutions for

Lightweight structures, especially sandwich components, can be achieved. A predefined insert, which is glued, for example, does not need this. Furthermore, minimizing material injury ^¬ supply the top layer (s) and the force introduction point is not bound to the insert or Onsertdurchmesser in contrast to conventional solutions. The process is more cost-efficient and increases process reliability. Standardized additional parts do not have to be provided.

Preferred polymer compositions are those previously described.

The crosslinkable polymer composition may be one, in particular two-component, adhesive. Such a polymer to ^¬ composition is introduced, which is structurally strong and particularly not expanding after solidification. A high force introduction is achieved for example via the threading of the mechanical connection means. Produced by the exothermic ^¬ men properties of the polymer composition, the intermediate layer and / or existing adhesive layers of the sandwich component can be partially melted in the reaction of the polymer composition. Thus, the anchoring of the polymer composition is improved; the processing of fastener on plastic, such as plastic screws is improved. Preferred polymer compositions are as previously described.

The crosslinkable polymer composition can have a pot life in the Be ^¬ rich 1-15 sec, preferably 2 to 10 sec, particularly preferably 3 to 7 seconds, have. Such does not flow the polymer together ^¬ mensetzung at the target site and, accordingly, no positioning aids are for example perforated sleeves for positioning the polymer composition necessary. Furthermore, the sandwich component can be further processed immediately, since the polymer composition has the necessary strength in a very short time in order, for example, to produce a load-bearing connection to another component by means of the connection means.

Under the pot life is understood according to DIN EN 923: 1998-05 the period in which a multi-component adhesive can be processed after mixing. The pot life was determined according to the "Method 3: determination by manual application" of the DIN EN 14022: 2010 (German version) .Of course, the fast reaction time of the system must be considered.

The method may further comprise the step of attaching or placing a bonding agent on or in the polymer to ^¬ composition before or after the solidification of the polymer composition. "In the polymer composition" means that the bonding agent can be pre-positioned at the target site so that the bonding agent is ^overmolded by the polymer composition introduced the solidified polymer composition, for example ^¬ a screw is screwed.

The connecting means may be selected from the group consisting of screw, threaded rod, clip, bolts, bushings, sleeves,

Spacers, pins, nails, hooks, clips, springs, rivets, dowels, profiles, flaps, hinges, magnets.

The invention further relates to a kit for the preparation of a sandwich component, particularly pointed out above, with at least one insert and / or onsert from a preferential ^¬ as crosslinked polymer composition comprising a crosslinkable, in particular two-component, polymeric composition and application instructions for performing a method as explained in advance.

A further aspect of the invention relates to a method for joining a sandwich component, as explained above, to a further element comprising the step of attaching or introducing a connecting ^agent directly into the polymer composition before or after the solidification of the polymer composition.

Furthermore, the invention relates to the use of a sandwich component as previously explained in the range Road, insbeson ^¬ particular commercial vehicles, cars, trucks, Formula 1, camper vans, two / three-wheeler, temporary road surfaces; Rail, in particular rail, tram, cable cars; Aviation, especially aerospace, aircraft, Drones, satellites; Marine, in particular Yacht & Superyacht, River, Transportation, Cruise Ships, Oil Rigs, Offshore Facilities, Underwater; Construction, in particular facades and roofs, floors, bridges, elevators, escalators, mobile homes; Interior fitting, in particular furniture, ceilings, walls, floors, shop fitting fair ^¬ construction, stage construction, stage, screen, doors, partitions, doors; Sports, in particular winter sports and water sports; Logistics, special to the ^¬ containers, tanks, pallets, packaging; Energy, in particular wind energy installations, solar installations; Mechanical engineering, in particular punching tools, coverings, moving parts; Medi ^¬ zin, in particular dental implants, implants, fixations; Weir ^¬ technology, especially rockets.

The invention will be described in more detail by means of exemplary Ausfüh ments.

Show it:

FIG. 1: sectional sketches of sandwich components according to the invention with polymer compositions as inserts (variants A to G);

FIG. 2: sectional sketches of sandwich components according to the invention with polymer compositions as inserts (variants A to C);

Figure 3: variants of possible openings of the inventive

Sandwich component; FIG. 4: sectional sketches of sandwich components according to the invention with polymer composition as inserts and bonding agents introduced therein (variants A to C) FIG. 5: sectional sketches of sandwich components according to the invention as, corner (A, B), T (C) or end connections (D);

FIG. 6: Exothermicity during introduction of the polymer composition in comparison to liquid dowels

FIG. 7: a side view of a honeycomb panel;

FIG. 8: a plan view of a honeycomb panel without a second cover layer.

FIG. 1 shows sandwich components 1 according to the invention comprising a first cover layer 11 and a second cover layer 12, which are separated by an intermediate layer 13. For the following be written ^¬ embodiments, an opening of the intermediate layer 13 has been through the first topsheet 13 and 31 drilled material is removed. In the region of an opening 31 and in the region of the intermediate layer 13 is a crosslinked polymer composition 21 as an insert. In variant A, the polymer composition 21 is in contact with the second cover layer 12. In the polymer composition 21, a connecting means or be introduced, ^{beispielswei ¬} se, a screw can be screwed. In variant B 21, the polymer composition to a Ausspa ^¬ tion 22, which is for inserting a connecting means, here a screw 41, configured.

Variant C shows a polymer composition 21 as an insert, which is not in contact with the second cover layer 12. In this case, a screw 41 is introduced into the polymer composition 21. Variant D shows a polymer composition 21 as an insert, wel ^¬ surface is not in contact with the second cover layer 12, and has a positioning aid 23, here a notch on the Po ^¬ lymerzusammensetzung in the region of the opening 31st By means of the locator 31 will be positioned a screw 41 at the central Be ^¬ area of the polymer composition and introduced.

Variant E shows a polymer composition 21 as an insert, wel ^¬ che is not in contact with the second cover layer 12, and a pre-positioned in the polymer composition screw 41, wherein the thread of the screw protrudes through an opening 31 of the sandwich member 31. The screw 41 was positioned in the region of the intermediate layer 13 prior to introduction of the polymer composition 21 and subsequently overmolded with the polymer composition 21. A cover plate 42 and a nut 43 can be attached to the exposed thread of the screw 41.

The variants C, D and E are particularly advantageous for decoupling vibrations, acoustic and / or thermal decouplings. Furthermore, forces directed only to one of the cover layers can be derived.

In variant F, the polymer composition 21 is in contact with the second cover layer 12. The polymer composition 21 protrudes through the opening 31 from the first cover layer 11 and has a positioning element or fixing element 23. At Po ^¬ sitionierungselement or fixing member 23 a further member can be attached, which is designed such that it forms a positive connection with the positioning element or fixing element 23rd Positioning elements or fixing elements can be tabs, angles, bolts, clips, sleeves sen, internal threads, screws, pins, recesses, protrusions, rails, barbs or rivets.

In variant G, the polymer composition 21, a female thread 44, which is ausgestal ^¬ tet for screwing in a screw 41st

Variant H shows a sandwich component 1, wherein the polymer together ^¬ mensetzung 21 is in contact with the second cover layer 12, but not 11 with the first cover layer This is particularly before ^¬ geous for decoupling vibration, acoustic and / or thermal decoupling. Furthermore, forces directed only to one of the cover layers can be derived. 2 shows further inventive sandwich components 1 on ^¬ facing a first cover layer 11 and a second cover layer 12, which is positioned at an intermediate layer 13 between the two cover layers 11, 12 ^¬. In variant A, the first cover layer 11 has an opening 31. By means of special undercut milling, material of the intermediate layer is removed and the shape of the subsequently introduced polymer composition 21 in the intermediate layer is predetermined. Through the opening 31, a crosslinkable polymer composition 21 is injected into a region of the intermediate layer 13. The polymer composition 21 forms an undercut and is partially in contact with the interim ^¬ rule layer 13 facing surface of the first cover layer 11. Thus, an undercut on the first cover layer 11 is formed of ^¬. A screw 41 is positioned in the crosslinked polymer composition 21. In this way, a high force introduction is guaranteed. Variant A is particularly advantageous for decoupling vibrations, acoustic and / or thermal decouplings. Furthermore, forces directed only to one of the cover layers can be derived. In variant B, the polymer composition 21 is in contact with the second cover layer 12. The shape of the polymer composition 21 in the solidified state is selected such that an improved introduction of force is ensured. In the contact region between the polymer composition 21 and the second cover layer 12, the polymer composition 21 is broadened in comparison to the region of the opening 31, so that a high force dissipation to the cover layer 12 is possible.

In variant C, the polymer composition 21 is in contact with the first cover layer 11 and the second cover layer 12. In the first cover layer 11 is an opening 31. In the second cover layer 12 is an opening 31 ^λ . The polymer composition 21 also serves as a spacer of the two cover layers 11, 12 at local pressure perpendicular to the plate. The polymer composition 21 has a recess 22 which extends from the opening 31 to the opening 31 ^λ . 31 such a connection can ^λ ^¬ medium, for example a pin, through the openings 31, are guided and positioned. In this way, force-introducing connections can be configured via the first cover layer 11 and the second cover layer 12.

3 shows openings of a sandwich component according to the invention (compare 31 in FIGS. 1 and 2). The opening can be circular (variant A), circular with at least one notch (variant B), as a straight slot (variant C), as one-sided curved

Slot or two-sided curved slot (variant D) be configured. Likewise, the opening may have several, preferably two, circular openings for introducing the polymer composition of the component according to the invention (variant E). In the variants B to E, the openings ensure an anti-rotation lock of the polymer composition (compare 21 in FIGS 2) in the sandwich component (see 1 in Figures 1 and 2), provided that the polymer composition is arranged in the region of the opening.

FIG. 4 shows sandwich components according to the invention with a polymer composition as insert and bonding agents introduced therein (variants A to C).

In variant A, the polymer composition 21 is in contact with the second cover layer 12. The polymer composition 21 is formed as an insert, in which a hook 42 is introduced directly as a connecting means.

In variant B, the polymer composition extends into the intermediate layer 13 and forms undercuts on the first cover layer 11. In the formed as an insert polymer composition is immediately introduced a profile 43 as a connecting means.

In Variation C, the polymer composition extends likewise in the intermediate layer 13 and forms at the first Deckla ^¬ ge 11 undercuts. In the polymer composition 21, a threaded rod 44 is introduced directly.

FIG. 5 shows sandwich components according to the invention with corner (variants A, B), T (variant C) or end connections (variant D).

Variant A shows a sandwich component 1 with a first sand ^¬ wichplatte and a second sandwich panel. The first sandwich panel is formed by a first cover layer 11 and a second cover layer 12, wherein the cover layers 11 and 12 are separated by an ^intermediate layer 13. The first cover 11 has ei ^¬ ne opening 31. The second cover 12 has an opening 31 ^λ on. The second sandwich panel is formed from a first Deckla ^¬ ge 11 ^λ and a second cover layer 12 ^λ, said top ^¬ layers 11 and ^λ 12 ^{^λ λ} are separated by an intermediate layer. 13 The first sandwich panel and the second sandwich panel form a corner connection from, wherein the first cover layer 11 with the ers ^¬ th topsheet 11, the second cover layer 12 with the second Deckla ^¬ ge 12 ^λ and the intermediate layer 13 with the intermediate layer 13 ^λ are in contact. Through the opening 31, a first polymer composition 21 was injected into a region of the intermediate layer 13 and a region of the intermediate layer 13 ^λ , wherein the polymer composition 21 is in contact with the intermediate layers 13 and 13 ^λ facing ^¬ surfaces of the cover layers 11 and 11 ^λ . Through the openings voltage 31 ^λ a second polymer composition was equally injected 21 ^λ in a range of the intermediate layer 13 and a portion of the intermediate layer 13 ^λ, said Polymerzusammenset ^¬ Zung 21 in contact with the intermediate layers 13 and 13 ^λ facing surfaces of the cover layers 12 and 12 ^λ stands. Preferably, the first polymer composition 21 and the second polymer composition 21 have the same chemical composition ^λ. In this way, a corner ^joint between two sandwich panels is formed in a particularly simple manner. The advantages explained above for sandwich components apply equally here.

Variation B differs from variant A in that a single opening 31 is formed in the first cover layer 11, through which a polymer composition 21 is injected.

Here, the polymer composition 21 is in contact with the intermediate layers 13 and 13 ^λ facing surfaces of the cover layers 11, 11 12, 12 ^λ . The polymer composition 21 forms a strut between the cover layers in the region of the corner joint. Such a Eckverbin ^¬ tion is formed between two sandwich panels in a particularly simple manner. The advantages explained above for sandwich components apply equally here.

Variant C shows a T-joint of a first sandwich panel and a second sandwich panel. The first Sandwichplatter is designed as described for variant B. The second sand ^¬ wichplatte has in the first cover layer 11 ^λ an opening 31 ^λ . The first and the second sandwich panel are arranged 90 ° in a Win ^¬ angle of substantially. The opening 31 ^{λ of} the second sandwich plate is arranged in the region of the intermediate layer 13 of the first sandwich plate. Other angles are application- specific ^¬ also possible. Through the opening 31 is a polyvinyl lymerzusammensetzung 21 in a region of the intermediate layer 13 and an area 13 ^λ injected. Here, the polymer composition 21 comes ^¬ proportionally through the opening 31 in the intermediate layer 13 ^λ ^λ. The polymer composition 21 connects the cover layers 11, 12, 11 ^λ and 12 ^λ . In this way, a T-connection of two sandwich panels is formed in a simple manner. The advantages explained above for sandwich components apply equally here.

Variant D shows a sandwich component 1 comprising a first cover layer 11 and a second cover layer 12, wherein the cover layers 11,

12 are separated by an intermediate layer 13. In a Endbe ^¬ rich cover layers 11 and 12, a cover is arranged as a rail 51, which in contact with the of the intermediate layer

13 groundbreaking surfaces of the cover layers 11 and 12 and the area of the intermediate layer 13, which is not in contact with the

Cover layers 11, 12 is. The rail 51 has an opening 31 ^{λ λ} , which is arranged in the aforementioned region of the intermediate layer 13. Through the opening 31 ^{λ λ} was a Po lyzer composition 21 injected into the end region of the intermediate view 13. The polymer composition is in contact with surfaces of the cover layers 11 and 12, which are the intermediate ^view 13 ^¬ turned.

FIG. 6 shows the curve of the temperatures of a polymer composition (A) according to the invention and of a commercial liquid dowel (B) measured in the core. On the X-axis the time is in min: sec and on the Y-axis the temperature in ° C is ^¬ carried.

For the comparison, a two-part mold was made of polyethylene. The mold has a circular bore of 10 mm diameter and 15 mm depth. The polymer compositions were introduced at room temperature using cartridges and the temperature course measured with a temperature probe, and placed ^¬ distinguished. The temperature was measured in 4 mm depth.

The temperature profile is exothermic for both systems, wherein the inventive polymer composition (A, core 3058_1) has a significantly higher core temperature of 80 ° C compared to the comparative composition of the liquid anchor (B) with a core temperature of 50 ° C. This will also be faster, i. reached within 15 seconds. The comparative composition reaches the highest core temperature after about 1 min 15 sec.

With the polymer composition according to the invention in a sandwich component, a better anchoring is achieved, for example by melting or melting the intermediate layer of thermoplastics, for example of sandwich components with an intermediate layer of polystyrene. Aluminum sandwich ^components often have polymer coatings, which likewise melt in some areas as a result of the high temperature of the polymer composition and lead to improved anchoring. Of Further, such as plastic screws can be anchored improved in the incorporated polymer composition.

FIG. 7 shows a side view of a honeycomb panel as a sandwich component. The honeycomb panel has a main surface Hl of a first cover layer 11, a main surface H2 of a second cover layer 12 and an intermediate layer 13 positioned between the cover layers, which honeycomb W has. The main surfaces Hl and H2 point away from the intermediate layer 13. The side areas Sl and S2 are formed by the cover layers 11 and 12 and the intermediate layer 13. Of course, a sandwich component or a honeycomb panel with rectangular main surfaces Hl, H2 has four side areas. Figure 8 shows a plan view of a honeycomb panel as described for Figure 6, wherein the second cover layer 12 is not shown for better clarity ^¬ probability. The intermediate layer 13 is formed by the honeycomb W. In the lateral area of the honeycomb panel, a polymer composition can be introduced by the method according to the invention.

Claims

claims

1. Sandwich component (1) comprising

a first main surface having a first cover layer (11) and a second main surface having a second cover layer (12), in particular a first cover plate and a second cover plate, wherein the first cover layer (11) and / or the second cover layer (12) has an opening (11) 31), weakening or marking and / or in the side region, in particular in a cover (51), an opening (31), Schwä ^¬ chung or marking is provided,

- at least one intermediate layer (13), wherein the interim ^¬ rule layer (13) between said first topsheet (11) and the second cover layer (12) is positioned, and

- a in the intermediate layer (13), in particular injected, and preferably crosslinked polymer composition (21) to form an insert, between the first cover layer (11) and the second cover layer (12) and We ^¬ sentlichen within the intermediate layer (13) and / or in the region of the opening (31), weakening or marking is arranged,

such that a mechanical connecting means (41) passes through the first cover layer (11) and / or the second cover layer (12) and / or in the side region, in particular the cover (51), in the region of the opening (31), weakening or marking, in particular by the first cover layer (11) and / or the second cover layer (12) and / or the side region, in particular the cover (51), protruding, directly in the polymer composition (21) is fixed or fixable.

2. sandwich component (1) according to claim 1, wherein the mechanical connection means (41) is selected from the group comprising ^¬ send screw, threaded rod, clip, bolts, bushes, sleeves, Spacers, pins, nails, hooks, clips, springs, rivets, dowels, profiles, flaps, hinges, magnets.

Sandwich component (1) according to claim 1 or 2, wherein the poly ^¬ merzusammensetzung (21) comprises an isocyanate-containing component A and an amine-containing component B, wherein

component A is an isocyanate-terminated prepolymer having an isocyanate functionality of> 1.7, preferably, from 1.7 ^¬ <f o _NC <3, more preferably in the range from Be ^¬ 2 to 3; and

component B contains at least one di- and / or polyamine, preferably a polyether diamine and / or polyetherpolyamine, and

wherein the stoichiometric ratio of isocyanate groups in component A to amine groups in component B from 0.5 to 1.2, preferably be ^¬ Sonders 1.

Sandwich component (1) according to one of claims 1 to 3, wherein the opening (41) is selected from the group slot, bore, in particular circular bore.

Sandwich component (1) according to one of claims 1 to 4, wherein the sandwich component (1) is a metal honeycomb plate, in particular an aluminum honeycomb plate, a plastic honeycomb plate, a wood material honeycomb plate, a foam core plate or ei ^¬ ne fiber core plate.

Sandwich component (1) according to one of claims 1 to 5, wherein the polymer composition (21) is designed such that the polymer composition (21) forms an undercut. Sandwich component (1) according to one of claims 1 to 6, wherein the polymer composition (21) is designed such that the polymer composition (21) forms a cohesive and / or positive and / or non-positive connection.

A method for manufacturing a sandwich component (1), in particular comprising ^¬ sondere according to any one of claims 1 to 7, with at least ei ^¬ nem insert and / or onsert from a preferably vernetzba ^¬ ren polymer composition (21) comprises the steps

- Providing a sandwich component (1) comprising

o a first major surface with a first cover layer

(11) and a second main surface with a two ^¬ deck layer (12), in particular a first deck ^¬ plate and a second cover plate, wherein the ers ^¬ te cover layer (11) and / or the second cover layer

(12) has an opening (31), weakening or marking and / or in the side region, in particular in a cover (51), an opening

(31), weakening or marking is provided, and

o at least one between said first topsheet (11) and the second cover layer (12) positioned Zvi ^¬ rule layer (13),

Introducing, in particular injecting, a crosslinkable polymer composition (21) at the location of the marking or the weakening or through the opening (31) in the first cover layer (11) and / or the second cover layer (12) and / or in the side region, in particular the cover (51), in the intermediate layer (13), and

Solidifying the polymer composition (21) between the cover layers (11, 12) such that a mechanical connecting means (41) passes through the first cover layer (11) and / or the second cover layer (12) and / or the side region, in particular the cover (51), in the region of the opening (31), weakening or marking, in particular by the first cover layer (11) and / or the second cover layer (12) and / or the side region, in particular the cover (51) protruding, directly in the polymer composition (21) is fixable.

The method of claim 8, wherein the crosslinkable polymer to ^¬ composition (21), in particular two-component, is adhesive.

The method of claim 8 or 9, wherein said cross-linkable poly ^¬ merzusammensetzung (21) has a pot life in the range of 1 to 15 seconds, preferably 2 to 10 sec, particularly preferably 3 to 7 seconds, when measured according to DIN EN 14022: of 2010.

Method according to one of claims 8 to 10, comprising the step of applying or introducing a Verbindungsmit ^¬ (41) on or in the polymer composition (21) before or after solidification of the polymer composition (21).

The method of claim 11, wherein the connecting means (41) is selected from the group consisting of screw, threaded ^¬ least attached, clip, pins, bushes, sleeves, spacers, pencils, nail, hook, clip, spring, rivets, dowels, profiles, plates , Hinges, magnets.

Kit for the production of a sandwich component (1), and in particular ^¬ according to one of claims 1 to 7, with at least ei ^¬ nem insert and / or onsert preferably from a crosslinked polymer composition (21) comprising

- a crosslinkable, in particular two-component, poly ^¬ merzusammensetzung (21) Application instructions for performing a method ge ^¬ Mäss any one of claims 8 to 12th

14. A method for bonding a sandwich component (1) according to one of claims 1 to 7 to a further element comprising the step of applying or introducing a Verbindungsmit ^¬ (41) directly into the polymer composition (21) before or after solidification of the polymer composition ( 21).

15. The method of claim 14, wherein the connecting means (41) is selected from the group consisting of screw, threaded ^¬ least attached, clip, pins, bushes, sleeves, spacers, pencils, nail, hook, clip, spring, rivets, dowels, profiles , Tabs, hinges, magnets.

16. Use of a sandwich component (1) according to Ansprü ^¬ che 1 to 7 in the field of road, rail, aviation, marine, construction, interior design, sports, logistics, energy, mechanical engineering, medicine, military technology.