DE4015454A1 - METHOD FOR PRODUCING A RESIN-COATED PLATE - Google Patents

Description

The present invention relates generally to a method for the production of a resin-coated plate with a poly olefin resin on the plate surface. In particular concerns the present invention a method for producing a resin-coated plate, such as ver is applied.

From Japanese patents 22 334/1983, 32 109/1987, 11 984/1988 and 53 343/1987 it is already known that polyols  fin resin as surface material of a slab for concrete casings lungs has outstanding properties.

The aforementioned Japanese patents 22 334/1983, 32 109/1987 and 11 984/1988 each disclose a process for Production of a slab for a concrete formwork by ther Mixing a polyolefin resin on a substrate ter using a resin as a thermal adhesive.

The aforementioned Japanese patent 53 343/1987 is open discloses a method of joining a polyolefin resin film with a particle board, with one side of a glow discharge exposed and then glue is placed on it.

Polyolefin resin has the property of being different from others Materials other than polyolefin will not adhere as it is not polar is. To make a polyolefin resin film over a material on wooden ba It is therefore necessary to lay the layer to be coated Side of the corresponding material of a glow discharge so that some of the surface molecules are polarized the. Furthermore, it is necessary to have a relatively expensive one Adhesive, for example an epoxy denatured acrylic resin Glue to use. However, this procedure has the aftermath part that the adhesive strength between the polyolefin resin film and the wood-based material is not yet satisfactory.

Furthermore, to connect a polyolefin resin film with known a process in which the polyolefin Resin film using a hot-applied resin is thermally bonded to the wood. This procedure is with regard to the cost of the adhesive and the adhesive strength of Advantage. However, this method has the disadvantage that it is difficult to make a resin-coated plate. This is because the moisture in the wood when Heating evaporates quickly. Water vapor expands after that  Hot pressing process and forms steam bubbles on the lower side of the for gluing melted resin. The steam bubbles push the Polyolefin resin film and expand the surface of the Polyolefin resin film.

Added to this is that coated with concrete Cladding Plat be used th that of natural wood - are made - without any modifications. Accordingly, cracks, breaks or the like occur on the surface of the base material in many cases. With regard to the surface quality of a first-class chipboard as concrete formwork, cracks with a crack length of 1.5 mm and cracks with a diameter of 10 mm are determined in accordance with the Japanese Agricultural Standard ( JAS). If such a concave area, such as a crack or break point, is directly overlaid by a material, a bridge is formed in the concave area only from the polyolefin resin, which reduces the physical strength of the formwork.

Furthermore, the conventional methods described above are not a method in which the coating with a polyolefin resin film is carried out as part of a primary production step of a wooden board, for example a plywood board or chipboard. Rather, it is in the above-described method is a method in which a polyolefin resin film in a second working step to a wood plate such as a sheet of plywood or a particle board, - after completion of the sheet of plywood or particle board - is applied.

The present invention is therefore based on the object a method of manufacturing a resin-coated plate specify when the polyolefin resin firmly with a wooden plate can be connected. It should between the wooden plate and  the polyolefin resin layer during the formation of the polyols Fin resin layer on the wooden plate no bubbles arise. The resin-coated plate should have a have high strength. Finally, the resin coating tete plate as part of the primary manufacturing step Wooden panel such as a plywood panel or one Chipboard, take place, whereby the total manufacturing costs ver should be wrested.

The above task is accomplished by a manufacturing process a resin-coated plate with the following process steps solved. First, a melted, adhesive polyol fin copolymerization resin between a polyolefin resin film and spent a nonwoven. Then a composite by attaching the polyolefin resin film to the nonwoven fabric by applying pressure and then cooling it testifies, the fleece on one side of the polyolefin resin film attached by the adhesive polyolefin copolymerization resin becomes. Then the composite layer is put on a wooden board Glued to the fleece applied, the fleece on the the wooden plate facing side is arranged. In the end the composite layer for connecting the composite layer with the Pressed wooden panel. As the previously described adhesive Reactive hardening commonly used as wood adhesive the adhesive, for example urea resin, melamine resin, Phe nol resin, urethane resin, epoxy resin, under ultraviolet light curing resin, mixtures of the aforementioned adhesives or resin formed by co-condensation. To the A resin with polyvinyl acetate, fluorine is also stretched or the like is used.

The resin-coated plate is, for example, as follows produced.  

First, a polyolefin resin film and a non-woven fabric are continuously fed toward a pressure roller. The polyolefin resin film and the non-woven fabric are bonded together by pressure using the pressure roller, and adhesive polyolefin copolymerization resin - in the molten state - is put like a curtain between the polyolefin resin film and the non-woven fabric. An extruder and a T nozzle are used for this. As a result, the adhesive polyolefin copolymerization resin melts on the surface of the polyolefin resin film and thereby bonds with the polyolefin resin film, whereby the adhesive polyolefin copolymerization resin penetrates into areas between the fibers of the nonwoven and is thereby firmly bonded to the fibers. Then the adhesive polyolefin copolymerization resin is solidified by cooling, whereby a composite layer is formed.

In the manufacture of the composite layer, the temperature of the adhesive polyolefin copolymerization resin, the contact pressure, the pressing time and the like in terms of the ratio between melting properties of the adhesive polyolefin copoly resin and the degree of formation of open spaces between the fibers of the fleece, so that the kle polyolefin copolymerization resin suitably in the nonwoven can penetrate. If the adhesive polyolefin Inadequate copolymerization resin in the nonwoven fabric penetrates, there is sufficient bonding respectively Anchoring not reached, which reduces the adhesive strength device. On the other hand, when the adhesive polyolefin copolymer excessive penetration into the nonwoven fabric, it gets on the back of the nonwoven again out of this, which is a problem with the connection of the composite layer with represents a wooden panel.  

The composite layer is with the wooden board, for example one Plywood board, a chipboard or a slab, connected as follows.

First, a reactive on the surface of the wooden plate curing adhesive spent.

Then we put on the composite layer, whereby the nonwoven on the side facing the wood. The composite layer is at a the melting point of the composite layer together not exceeding temperature hot ge presses or is cold pressed at room temperature.

The adhesive penetrates the free spaces between the fibers of the nonwoven. The adhesive is then reacted hardens. After the hot pressing process, the adhesive effect is consequently of the adhesive increased. Even when water vapor comes out of the wood come out, there are no bubbles within the composite layer formed, which makes a resin-coated plate with high adhesion strength is achieved.

The present invention serves the fixed connection and bin the polyolefin resin with a wooden panel over the fibers of the nonwoven fabric, the polyolefin resin and the wood panel are actually not easy to connect. There the polyolefin resin and the wooden panel are made by heating to the adhesive polyolefin copolymerization resin melted state and using this melted Polyolefin copolymerization resin as an adhesive with each other connected.

If a wooden panel is to be coated with a polyolefin Resin film can be covered, however, is due to coating of the water in the wooden plate is difficult. The what It evaporates in large quantities and the water vapor depresses it  adhesive polyolefin copolymerization resin away from the wood if the hot pressing process is finished. This creates bubbles.

According to the invention, the polyolefin resin and the fleece adhere composite layer on the wooden panel. Corresponding the formation of bubbles at the end of the hot pressing ganges prevented, whereby the polyolefin resin firmly attached to the Wooden plate sticks. To be more precise, the following results: the nonwoven fabric and the polyolefin resin film using the adhesive polyolefin copolymerization resin for manufacture are bonded together, the fleece adheres fabric and the polyolefin resin film firmly together by the Penetration of the adhesive polyolefin copolymerization resin into the free spaces between the fibers of the nonwoven. If the Composite layer using a reactive curing adhesive material is bonded to the wood, it reacts curing adhesive easily into the spaces between the fibers of the nonwoven and cures there reactively.

As described above, the adhesive poly penetrates olefin copolymerization resin from one side in the fleece fabric, whereas the reactive curing adhesive from the other ren side in the nonwoven fabric, d. H. between the fibers of the Nonwoven, penetrates. As a result, the nonwoven takes on one Function in that its fibers both the resin and also bond the adhesive together in a state in which almost all of the free spaces or gaps between the Fibers of the nonwoven with the adhesive polyolefin copolyme resin and the reactive curing adhesive filled are.

When the composite layer is connected to the wooden board, release steam during hot pressing within the composite layer puts. However, according to the teaching of the invention Vent the steam through the non-woven fabric in the composite layer.  

More specifically, a few columns remain in the area of the company of the nonwoven, although almost all gaps between the fibers of the nonwoven through the adhesive polyolefin copo immerizing resin and the reactive curing adhesive are decorated. The remaining columns form a path to the Escape of water vapor. Consequently, the remaining one Amount of water vapor remaining within the composite layer significantly reduced, causing problems like for example the expansion and tearing of the composite layer is avoided at the end of the hot pressing process.

As a result, the nonwoven has a venting function. Correspond The coating of the wooden plate with the ver Bundle in the production of the wooden panel as plywood plate, chipboard or slice plate.

Even if concave areas like cracks and crevices on the If the surface of the wooden plate is present, it becomes concave Areas from the composite layer with integrated nonwoven over covers, resulting in a resin-coated wooden plate with high Fe Stability, especially high rigidity, is achieved.

In particular, conventional adhesive can be used according to the invention materials for connecting the composite layer to the wooden board turn. The composite layer and the wooden board are used at ei ner temperature, which is below the temperature after the melting measurement method is firmly connected.

Furthermore, there are no problems with blistering, because when connecting the composite layer with the wooden panel and the occurring temperature of the nonwoven fabric on that side, on which the composite layer is connected to the wood, a path to escape the water vapor released from the wood forms.  

Furthermore, the method according to the invention placed, resin-coated plate on its surface a bottom lyolefin resin. As a result, this prevents on the surface Resin of the wood affects the hardening already mixed concrete, which increases the possibility of pest concrete is eliminated. Furthermore, the can resin-coated wooden panels built formwork after curing Easily remove the concrete without sticking, as the polyols fin resin is not polar. Consequently, concrete are poured Products not damaged by removing the formwork. Because The polyolefin resin is chemically stable. The resin layered plate has the outstanding property that it can be reused numerous times as formwork. This applies even when it is alkaline atmosphere, water, heat or the like of the already mixed concrete for a long time Duration is suspended.

Furthermore, the nonwoven fabric is inside the polyolefin resin films trained. The surface layer shows accordingly high strength. Even if the surface of the Wood plate is disadvantageous, can be educated Keep the elastic strength relatively high.

The task on which the teaching according to the invention is based also solved in that a method for producing a resin-coated panels has the following process steps: First, one side of a polyolefin resin film is oxidized. Then a composite layer is created by connecting a fleece with the oxidized side of the polyolefin resin film ter using a first adhesive. The Ver The bundle is then placed on a wooden board using a second adhesive applied, the nonwoven on the the wooden plate facing side is arranged. In the end  the composite layer for connecting the composite layer with the Pressed wooden panel.

As a polyolefin resin film as described above For example, a biaxially oriented polypropylene film use.

As the first adhesive, an aqueous vinyl-polyurethane adhesive, an epoxy-denatured acrylic emulsion adhesive, polyester-polyurethane elastomer adhesive, or the like could be used. It is desirable that the thickness with which the adhesive is applied is slightly greater than the extent to which the adhesive penetrates into the fibers of the nonwoven. This is around 30-50 g / m ² .

The second adhesive used is reactive curing adhesives, such as B. urea resin, melamine resin, phenolic resin, urethane resin, Epoxy resin, resin hardening under ultraviolet light, the Mixtures or by condensation Resin used. If the resin-coated plate as a concrete sheet is used, an adhesive with a relatively low Water solubility used as a reactive curing adhesive.

The above-described resin-coated plate is used as an example produced as follows: First, the polyolefin resin film and the nonwoven fabric are continuous funded in the direction of a pressure roller. The one Side of the polyolefin resin film that adheres to the nonwoven fabric is an oxidation process, for example one Glow discharge, subjected to polari surface siert. Then the first glue is on the one Applied to the side on which the polyolefin resin film with the Nonwoven should be connected. The nonwoven is then  Put it on and the whole thing is heated and pressed on roll pressed. A composite layer is then completed.

The composite layer is made with a wooden plate, for example one Plywood board, a particle board or a small disk plate connected for example as follows.

First, the second adhesive is applied to the surface of the wooden plate fabric applied. The composite layer is placed on top of it Non-woven fabric is on the side facing the wooden plate det. The whole is pressed at room temperature. The reactive curing adhesive penetrates into the spaces between the company of the nonwoven.

The composite layer is then heated and hot pressed. There after that the adhesive is reaction hardened. After completing the The hot pressing process increases the adhesion of the adhesive. Even then when water escapes from the wooden plate, form in There are no bubbles within the bonded layer, which creates a resin layered plate with high adhesive strength is reached.

If the type of reactive curing adhesive more suitable is selected, the composite layer can only connect to the wooden panel by cold pressing. Additionally lets the resin-coated plate is used continuously Make the pressure roller.

If desired, the polyolefin resin film directly attached to it to connect the wood board, the polyolefin resin film and the wooden panel is not good due to its molecular structure stick to each other, it is difficult to have ideal liability conditions to achieve, especially since many factors such as the tem temperature, the wood plate contained water or the shape of the Wooden plate limit the adhesion.  

According to the invention, the polyolefin resin film and the Nonwoven bonded to a composite layer. Since the Composite layer on the side of the nonwoven with the wooden plate will even be connected using an inexpensive one Wood adhesive achieved sufficient adhesive strength. About it In addition, the water vapor escaping from the wooden plate by splitting between the fibers of the nonwoven fabric in the Ver the adhesive will escape. Consequently, when avoided steam bubbles.

The nonwoven therefore has a ventilation function. Correspond Accordingly, wooden panels such as plywood can be used , particle board or particle board during their manufacture coat or coat with the composite layer.

Even when concave areas like cracks or crevices appear on the surface of the wooden plate exist, they become concave Areas of which the nonwoven as an integral part containing composite layer covered, creating a resin coating tete plate with high strength, especially with high Stei ability arises.

According to the invention, problems caused by bubbles are eliminated avoided because when connecting the composite layer to the wooden board by heating the side facing the wooden plate the composite layer provided for the from the wood emitted water vapor serves as an outflow path. Hence lets the composite layer coincides with the manufacture of the wood Apply the plate to it or connect it to it the. In addition, the wooden plate and the composite Connect the layer with common adhesives. The result is a inexpensive, resin-coated wooden panel with outstanding quality act created.  

Furthermore, in the case of the method in question manufactured, resin-coated wooden plate of the non-woven material inside half of the polyolefin resin film. The is accordingly High strength of the surface material. Even if the Surface of the wooden plate has some disadvantages the strength of the resin-coated wood panel is relatively high hold.

The task on which the teaching according to the invention is based additionally also solved in that the method for the manufacture the following process steps having: On one side of a nonwoven fabric is made using a Laminator polyolefin resin spent. From the fleece fabric and that formed on one side of the nonwoven fabric Polyolefin resin layer is made by joining the polyolefin Resin with the nonwoven under the influence of pressure and then cooling the polyolefin resin with the nonwoven fabric creates a composite layer. The composite layer is then ver stick with the fleece applied to a wooden plate, the Fleece is arranged on the side facing the wooden plate. Finally, the composite layer is used to connect the composite layer pressed with the wooden plate.

A nonwoven fabric is used as the nonwoven fabric, which is characterized by a Dry method, a chip binding method, a wet method or the like is made. The wet method nonwoven fabric shows a slightly worse water resistance Stability, but is cheap to manufacture. To the Resistance to water, and to increase the The binding effect with the polyolefin resin can increase Nonwoven fabric with ethylene vinyl acetate resin by sprinkling or Immersion to be impregnated. As a polyolefin resin, depending on Application polypropylene resin, high density polyethylene resin,  Low density polyethylene resin, ethylene vinyl acetate resin or the like can be selected. As a polyolefin resin is a Resin with high fluidity in the molten state too prefer.

Common wood adhesives can be used as reactive curing adhesives substances such as urea resin, melamine resin, phenol resin, urethane resin, epoxy resin, under ultraviolet light curing resin, mixtures thereof or by co-condensation Use the resin produced. If the resin-coated wood plate used as concrete formwork is considered reactive curing adhesive is an adhesive with a relatively high water resistance used. The resin-coated plate can be used produce as follows: The polyolefin resin is made in a curtain-like form from a T- Nozzle onto the continuously conveyed nonwoven fabric by means of an egg ner extrusion laminator used in the usual form left out. It is pressed by a pressure roller. Thereupon the polyolefin resin pushes into the nonwoven and becomes cooled in after the heat is removed by the pressure roller leads is. This creates a composite layer that the polyo resin layer and impregnated with the polyolefin resin Contains nonwoven.

The polyolefin resin originally has no polarity. However, if the temperature of the butt released from the T-nozzle lyolefin resin is considerably high, the Surface of the polyol left out in a curtain-like shape fin resin after being released into contact with air. Hence oxidation takes place. To extend the oxidation time like, preferably the air gap between an outlet T-nozzle for the resin and the surface of the nonwoven fes specified larger. Specifically, this air gap is almost 150-180 mm.  

In the production of the composite layer, the polyolefin resin, the lamination speed, the pressing pressure and the like in Terms of the relationship between melting properties of the Polyolefin resin and the degree of between the fibers of the Non-woven fabric free spaces or gaps set, see above that the polyolefin resin is appropriately incorporated into the nonwoven fabric can reach. If the polyolefin resin is insufficient in the Nonwoven penetrates, is an adequate anchoring effect between the resin and the nonwoven fabric, thereby the adhesive strength is reduced. However, if the polyolefin Resin penetrates excessively into the nonwoven fabric so that it is on the The back of the nonwoven is pushed out again a problem of adhesion between the composite layer and the wood plate.

The composite layer is with the wooden board, for example one Plywood board, a chipboard or a slab, connected as follows.

First, a reactive on the surface of the wooden plate hardening adhesive applied. The composite layer is on it positioned, with the nonwoven on the wooden board facing side. Then the composite layer pressed at room temperature. In doing so, it penetrates reactively hardening adhesive in the free spaces or gaps between the fibers of the nonwoven.

The composite layer is then heated and in the context of a Hot pressing process pressed. The adhesive then hardens through reaction. After the hot pressing process is complete the adhesion of the adhesive increases. Even when water steam coming out of the wooden plate form inside the composite layer has no bubbles, making a resin-coated Plate with high adhesive strength is realized.  

With a suitable choice of the reactive curing adhesive the composite layer with the wooden panel is also only by Connect cold presses. The resin-coated plate can be under Using a pressure roller can be manufactured continuously.

If it is desired that the polyolefin resin film directly with the Wood panel is connected, both the wood panel as well the polyolefin resin film is not because of its molecular structure stick easily to each other, it is difficult to ideal conditions of detention achievements. This is because of numerous factors like the process temperature contained in the wood panel Water or the shape of the wooden plate is limited in its diversity are.

According to the invention, one side of the nonwoven is first used coated with the polyolefin resin to make the composite layer len. Since the composite layer on the side of the nonwoven with the Wood panel is connected, is sufficient adhesion even using a cheap wood glue enough. In addition, what is emitted on the wooden plate arrives Steam through gaps between the fibers of the nonwoven during the connection process to the outside, thereby during of the connection process steam bubbles can be prevented.

As a result, the nonwoven has a venting function. Erfin According to the coating of the wooden plate with the Composite layer in the same manufacturing process as the wooden board for example a plywood board, a particle board or a Disc plate, perform.

Even if concave Be empires like cracks or breaks exist, the konka ven areas of the Ver integrally containing the nonwoven fabric  cover the bundle layer, creating a resin-coated plate with ho strength, especially rigidity, is created.

During the production of the composite layer, the oxidation of the Surface of the polyolefin resin film to increase the proportion the acid radicals increased. This is done by increasing the Temperature of the polyolefin resin discharged from the T-nozzle and by increasing the air gap between the outlet opening the T-nozzle and the surface of the nonwoven. Thereby the adhesive strength between the polyolefin resin film and a filament of the nonwoven fabric.

If the filament of the nonwoven fabric has previously been coated with an ethylene Vi nyl acetate emulsion coated by sprinkling or dipping the adhesive strength between the polyols fin resin film and the filament of the nonwoven fabric due to the Compatibility of the ethylene vinyl acetate emulsion with the poly Improve olefin resin.

According to the invention, bubble problems are avoided, since when the composite layer is bonded to the wooden plate by means of heating, the nonwoven fabric located on the binding side of the composite layer has an escape path for the water vapor emitted from the wooden plate. Consequently, the composite layer in the manufacturing process of the wooden board - at the same time - apply to the wooden board. In addition, a conventional adhesive can be used to connect the composite layer to the wooden plate.

In the case of the resin resin manufactured according to the method in question layered plate is the nonwoven fabric inside the polyolefin Resin film formed. The strength of the Surface material high. Even with some irregularities the strength rela Keep it up.  

Although not expensive to manufacture the composite layer, stick the copolymerization resin has been used, one can Ensure adhesive strength and resistance to Water can be preserved. Consequently, the cost of this is too raw material used, which makes an inexpensive, resin-coated plate created with superior quality is.

Finally, the teaching of the invention can be based lying task also by a method for producing a Solve resin-coated plate, the following process steps includes: An adhesive polyolefin copolymerization resin and a polyol Fin resin are used on one side of a nonwoven fabric using a two-layer extrusion laminator brings. From the nonwoven fabric and the one side of the nonwoven fabric and the polyolefin resin layer formed thereon provided polyolefin copolymerization resin layer is by Bonding the resin with the nonwoven under the influence of Printing and then cooling the resin with the nonwoven creates a composite layer. The composite layer is on a wood plate applied by gluing with the nonwoven, wherein the nonwoven on the side facing the wooden panel is arranged. Finally, the composite layer for connecting the Composite layer pressed against the wooden plate.

As a reactive curing adhesive, conventional wood Adhesives such as urea resin, melamine resin, phenol resin, urethane resin, epoxy resin, under ultraviolet light curing resin, their mixtures, and by co-condensation trained resin used. If the resin-coated plate used as formwork element for concrete are called reak tiv-curing adhesives used those that are relatively  have high water resistance. The resin in question coated plate is produced as follows, for example: The adhesive polyolefin copolymerization resin and the polyol Fin resin are curtain-shaped from a T nozzle to a continuous omitted nuously promoted nonwoven. this happens using a two-layer extrusion laminator tung. Then the whole is ge by means of a pressure roller presses. The adhesive polyolefin copolymer then penetrates resin in the nonwoven fabric and is after heat is removed cooled over the roll. This gives you a composite layer a polyolefin co. adhering to one side of the nonwoven fabric polymerization resin layer and the polyo formed thereon lefin resin layer.

The adhesive polyo lefin copolymerization resin, the lamination speed, the pressure to be applied and the like in view of the ver Ratio between the melting properties of the adhesive polyo lefin copolymerization resin and the degree of between the the gaps of the nonwoven fabric respectively Clearance set so that the polyolefin resin is more suitable Way can penetrate into the nonwoven. If the sticky bottom lyolefin copolymerization resin inadequate in the Nonwoven penetrates, is not sufficient anchoring between the polyolefin copolymerization resin and the Non-woven fabric reached, leading to a reduction in adhesive strength leads. However, if the polyolefin copolymerization resin The polyolefin copo becomes excessive in the nonwoven Lymerisation resin on the back of the nonwoven again squeezed out what about the adhesion with the wooden panel means a problem.

A composite layer with the adhesive polyolefin copolymer on resin layer on one side of the non-woven fabric and on it  trained polyolefin resin layer can by Ausgestal the adhesive polyolefin copolymerization resin and Polyolefin resin in film form and by subsequent overlaid like the resin layers on the nonwoven and subsequent Heating and melting the resin layers in the course of a heat Generate pressing process.

The composite layer is with the wooden board, for example one Plywood board, a chipboard or a slab connected as follows.

First, the reactive curing adhesive is applied to the surface surface of the wooden plate. The composite layer is with the Non-woven fabric on the side facing the wooden plate sets and pressed at room temperature. Then the right penetrates active curing adhesive in the gaps between the fibers of the nonwoven.

The composite layer is then heated and in the context of a Hot pressing process pressed. The adhesive then hardens Reaction off. After the hot pressing process is complete Adhesive strength increased. Even if a ge low water vapor content remains within the composite layer, No bubbles form, so a resin-coated plate is created with high adhesive strength.

If the type of reactive curing adhesive carefully is selected, the composite layer with the wooden panel can be also only connect by cold pressing. Furthermore leaves the resin-coated plate is used continuously Make the pressure roller.

If necessary, add the polyolefin resin film directly the wood panel firmly, with both the polyolefin Resin film as well as the wooden panel due to the molecular  It is difficult to adhere structure to one another on its own to get ideal liability conditions because of many factors for example the temperature conditions in the wooden plate contained water or the shape of the wooden plate are.

According to the invention, one side of the nonwoven fabric is covered with egg an adhesive polyolefin copolymerization resin and a polyo coated with lefin resin to create the composite layer. Since the Composite layer on its side with the nonwoven with the Wood panel is connected, can even be used using egg cheap wood glue has sufficient adhesive strength aim. In addition, what is emitted from the wooden plate gets steam through free spaces between the fibers of the nonwoven during the connection process to the outside, whereby the formation of Steam bubbles are avoided during the connection process.

As a result, the nonwoven has a venting function. Correspond chend the coating of the wooden plate during the Manufacturing process of the wooden plate, for example a chip plate, a plywood plate or a slice plate, carry out.

Even if concave Be rich such as cracks and breaks exist who which the concave areas of the composite layer with the inte covered nonwoven fabric, giving an overall resin layered plate with high strength, especially high Stiffness.

According to the invention by connecting the composite layer with the wooden plate by heating and by the fact that through the fleece fabric on the bond side of the composite layer is a path to ent deviate from water vapor emitted from the wooden plate fen problems are avoided. Hence lets  the composite layer during the manufacturing process of the wooden plate with the Connect the wooden plate. In addition, the wooden plate and the composite layer using a common adhesive be connected to each other.

In the resin-coated manufactured by this method Plate is the nonwoven fabric within the polvolefin resin film educated. The strength of the surface dimension is corresponding terials up. Even if the surface of the wooden plate disadvantages has, the strength can be kept relatively high.

If in the production of a resin-coated plate according to the invention by one of the four methods discussed above, the wood plate is designed as plywood with a plurality of laminated wood layers, the composite layer can be applied to the outermost surface of a group of laminated wood layers by heat setting and subsequent hot pressing, whereby by heat setting and hot pressing - outside the manufacturing process of the plywood - at the same time the wood layers of the plywood are connected to each other. Thermosetting adhesive used for the production of plywood can be used as the above-mentioned adhesive.

This manufacturing process is described in more detail below ben. In the manufacturing process outside the manufacturing processes of Plywood becomes the composite layer on the outermost surface the group of laminated wood layers using an adhesive applied for plywood. The nonwoven is on the outermost surface of the group of laminated wood layers facing side. The composite layer is heated and with hot pressing in the same way as in the production of the ordinary plywood pressed. During heat treatment the melting point of the resin forming the composite layer is not exceeded. In this process, the composite layer is with  connected to the group of layers of wood at the same time as the layers of wood are joined together, thereby resin-coated wood panel through simple process steps and thus low costs can be produced.

If, in one of the above-described methods for producing a resin-coated plate, the wood plate is designed as a chipboard or disc plate with a large number of solid wood particles, the composite layer can be applied to the surface of a layer containing a group of wood particles. This is done by means of a thermo-fixing adhesive and by hot pressing in the hardening and molding process - outside the manufacturing process of the wood particle-containing plate - while the chipboard or disc plate is hardened and molded at the same time.

This manufacturing process is described in more detail below. The heat setting adhesive is applied to the surface of the ver applied on the side of the nonwoven fabric. A Plate or disk is formed on it. The Verbund layer is hot pressed and at one the melting point of the Composite layer forming resin not exceeding temperature shaped. According to this procedure, the bonded layer with a Group of wooden particles connected, while the die Containing wood particles or the slices containing plate is solidified and molded. This will the resin-coated plate through simple process steps and reduced manufacturing costs.

There are now several ways to teach the present the present invention in an advantageous manner and white to train. This is due to the subordinate claims che, on the other hand to the following explanation of Aus leadership examples of the invention with reference to the drawing refer. In conjunction with the explanation of the preferred  Embodiments of the invention are based on the drawing also generally preferred configurations and refinements of teaching. In the drawing shows

Fig. 1 a diagram showing the flow of a method according to the invention for manufacturing a composite sheet,

Fig. 2 in cross section, schematically, a harzbeschichte te plate having a composite layer, which has been prepared by the process shown in FIG. 1 process,

Fig. 3 in cross section, schematically, a harzbeschichte te plate having a composite layer, which has been prepared by the process shown in FIG. 1 process,

Fig. 4 in a diagram, schematically, another Ver drive for producing a resin-coated plate,

Has been Fig. 5 shows in a cross section, schematically, a harzbe coated plate having a composite layer, HERGÉ by the process shown in FIG. 4 process,

Fig. 6 in cross-section, schematically, another game When a resin-coated plate having a composite layer which is prepared by the in FIG. 4 process shown,

Fig. 7, in a diagram, schematically, a further example of the inventive method from guide for producing a resin-coated plate

Fig. 8 in cross section, schematically, a resin-coated plate with a composite layer, which has been produced by the method shown in Fig. 7 and

Fig. 9 in cross section, schematically, a further resin-coated plate with a composite layer, which has been produced by the method shown in Fig. 7.

Exemplary embodiments of the invention are described below Teaching described using the figures.

With reference to FIG. 1, a first embodiment of a method according to the invention for producing a composite sheet is described.

A film with a thickness of 40 μm of the SHOLEX 2010HF type from SHOWA DENKO KABUSHIKI KAISHA is used as the polyolefin resin film 1 . ELTAS N-5040 from ASAHI CHEMICAL INDUSTRY CO., LTD. is used as nonwoven fabric 2 . ER resin ER523L from SHOWA DENKO KABUSHIKI KAISHA is used as the adhesive polyolefin copolymerization resin 3 . The temperature and the thickness of the copolymerization resin discharged from an extruder 4 with a T-nozzle are 240 ° C. and 20 μm.

The copolymerization resin 3 is let out on the resin film 1 . The promotion of the resin film 1 and the nonwoven fabric 2 he follows at a speed of 15 m per minute. The polyolefin resin film 1 and the nonwoven fabric 2 are bonded to each other by pressure application between a pressure roller 5 and a cooling roller 6 , the copolymerization resin 3 being sandwiched between the resin film 1 and the nonwoven fabric 2 . Sequence Lich the Copolymerisationsharz 3 is melted in a molten state with the resin film 1 and cooled while it penetrates into gaps between the fibers of the nonwoven fabric. 2 The Copolymerisationsharz is further from cooled until finally a composite layer 8 with the polyolefin resin film 1 and the non-woven fabric 2 is made by Abkühlrollen 7, wherein the Po lyolefin resin film 1 and the non-woven fabric 2 are firmly connected to each other ver. The composite layer 8 is rolled up roll 9 by means of a winding.

The production of a resin-coated plate using the composite layer 8 produced according to the above description is described below, the resin-coated plate being used for concrete formwork.

In Fig. 2, the reference numeral 10 is a five-ply, commercially available plywood sheet with a thickness of 12 mm be distinguished. This wooden plate 10 serves as formwork. As adhesive 11 is a mixture of 20% flour with melamine urea resin adhesive UM-82 from AICA KOGYO CO., LTD. used.

The adhesive 11 is applied to the upper surface of the plywood plate 10 at 200 g / m ² . The composite layer 8 is applied to the plywood panel 10 such that the nonwoven fabric 2 is arranged in the composite layer 8 on the side facing the plywood panel 10 . The composite sheet 8 is cold pressed for twenty minutes and then hot pressed for five minutes. This happens at a temperature of 105 ° C and a pressure of 5 kg / cm ² . As a result, a resin-coated plate with a composite sheet 8 and a plywood sheet 10 is obtained , the composite sheet 8 and the plywood sheet 10 being firmly connected to each other. In addition, there are no bubbles at or after the end of the hot pressing process.

In a second embodiment, the adhesive consists of a mixture of 20% fluorine with a phenolic resin adhesive P-82 from AICA KOGYO CO., LTD. This adhesive is applied to the upper surface of a wooden panel made of wooden disks from LOUISIANA-PACIFIC CORPORATION in an amount of 250 g / m ² . A composite layer is produced in accordance with the description of the first exemplary embodiment. This composite layer is fastened to the wooden plate containing wooden disks, the nonwoven being arranged on that side of the composite layer which faces the wooden plate. The composite sheet is cold pressed for twenty minutes and then hot pressed for seven minutes. This happens at a temperature of 110 ° C and a pressure of 5 kg / cm ² . As a result, a resin-coated wooden panel for concrete formwork is obtained, the composite layer 8 and the wooden panel 10 containing wooden disks being firmly connected to one another and a smooth and firm surface being obtained. Furthermore, there are no bubbles after the hot pressing process.

In a third exemplary embodiment, a mixture of 10% fluorine with urea resin UC-120 from AICA KOGYO CO., LTD. Is used as the adhesive. used. This adhesive is applied to both surfaces of a 1.3 mm thick plywood board made of South Sea mahogany. The laminates are applied to a curved wooden base made of R600 in such a way that their fibers cross at right angles to each other. Furthermore, a composite layer as in the first exemplary embodiment has been produced and applied to both the outer surface and the lower surface of a group of 10 wood layers by means of the same adhesive 11 with which the nonwoven fabric 2 is brought onto the side of the group of 10 wood layers . The composite layer 8 is connected by pressure application with electrode plates for high-frequency heating to the curved wooden base on its outer surfaces. During the pressing at 5 kg / cm ^2, the composite sheet is heated 8 hochfre quent. The hot pressing process takes about twenty minutes and is carried out at an internal temperature between 80 and 100 ° C.

As a result, the adhesive 11 is fully cured, thereby creating a resin-coated plywood board of the R 600 type with a thickness of almost 12 mm, both surfaces of which are coated with a polyolefin resin film 1 as shown in FIG. 3.

In a fourth embodiment, the resin-coated plywood panel is manufactured as in the first embodiment. This embodiment differs from the first only in that, as non-woven fabric 2 of the type E 5040 ELTAS ASAHI CHEMICAL INDUSTRY CO., LTD. is used. As a result, a resin-coated plywood panel is obtained, which has outstanding properties as a panel for concrete formwork.

A fifth exemplary embodiment is in turn a composite layer that is produced like the first exemplary embodiment. It differs from the composite layer of the first exemplary embodiment in that a 30 µm thick film of the SHO-ALLOMER FA201 type from SHOWA DENKO KABUSHIKI KAISHA is used as the polyolefin resin film. The type BEMLIESE JF-601 from ASAHI CHEMICAL INDUSTRY CO., LTD. used. The ER RESIN ER 321P type from SHOWA DENKO KABUSHIKI KAISHA is used as the polyolefin copolymerization resin. The temperature and the thickness of the extruder 4 having a T-nozzle is 280 ° C. and 30 μm.

A by mixing 15% fluorine with phenol-melamine resin P-85 from AIGA KOGYO CO., LTD. is applied to the surface of this composite layer in an amount of 180 g / m ² on the side on which the nonwoven is formed.

Furthermore, a plate coated with adhesive is attached attached to the surface with the same adhesive is provided with which the composite layer has been created.  

The composite sheet is hot pressed for 15 minutes at a temperature of 145 ° C and a pressure of 15 kg / cm ² . The result is a resin-coated chipboard with a thickness of 12 mm. This chipboard has excellent properties as a formwork element for concrete.

As a sixth embodiment, a slice board is opened made the same way as the board or the Plate according to the fifth embodiment with the sub decided that instead of typical elements, disc-shaped elements elements can be used. As a result, a resin-coated one Preserved board with disc-shaped elements, which leads to the concrete has excellent properties.

In a seventh embodiment, a mixture of 20% fluorine with melamine-urea resin UM-82 from AICA KOGYO CO., LTD. Is used as the adhesive. used. This adhesive is applied to both surfaces of a five-ply South Sea mahogany wood with a thickness of 2.4 mm at 200 g / m ² . The Lami nate of the wood overlap so that their fibers are arranged at right angles to each other. The same amount of glue is also applied to the outer surfaces of a group of layers of wood. Composite layers, which are in the same way as in the fifth embodiment, are placed on the wood in such a way that the nonwoven is arranged on the side facing the wood. The composite layers are hot pressed for five minutes at a temperature of 120 ° C and a pressure of 15 kg / cm ² . The result is a resin-coated plywood panel with outstanding properties for use as concrete formwork. In addition, no bubbles occur due to escaping water vapor when the hot pressing process is completed.

For a description of an eighth exemplary embodiment, reference is made to FIG. 4. A 30 µm thick film is used as the polyolefin resin film 1 . This film is obtained by subjecting one side of a commercially available, biaxially oriented and fiber-reinforced polypropylene film to an oxidation process by glow discharge. As the adhesive 23 polyester polyurethane from AICA KOGYO CO., LTD. used for dry lamination. BEMLIESE JF 601 from ASAHI CHEMICAL INDUSTRY CO., LTD. with 60 g / m ² used.

The polyolefin resin film 1 is conveyed or fed in such a way that the surface exposed to the oxidation process is arranged on the underside. The adhesive 23 is placed between a gravure roller 12 and a rubber roller 13 on the surface exposed to the oxidation process of the polyolefin resin film. The adhesive 23 adheres to the surface of the gravure roll 12 upon rotation of the engraved roller 12, wherein an excess of adhesive is stripped off by a Abstreifplättchen 14 23rd Then, the adhesive 23 adheres to the polyolefin resin film 1 to such an extent that the adhesive 23 is applied to the polyolefin resin film 1 at 50 g / m ² .

The polyolefin resin film 1 coated with the adhesive 23 is heated and cold dried by a blower dryer 15 . The polyolefin resin film 1 then reaches the nonwoven fabric 2 . The polyolefin resin film 1 and the nonwoven fabric 2 are connected by a pressure from the rubber roller 5 and the pressure roller 6 to a composite layer 28 . The composite layer 28 is wound up on the take-up roll 9 .

A method for producing a resin-coated slab for concrete formwork is described below with reference to FIG. 5, the composite layer 28 being used in the production thereof.

As a wooden plate 10 , a 12 mm thick, commercially available plywood is used. Adhesive 11 is obtained by mixing 10% fluorine with melamine-urea resin UM-82 from AICA KOGYO CO., LTD. obtained glue used.

The adhesive 11 is applied to the upper surface of the plywood plate 10 at 200 g / m ² . The composite layer 28 is fastened to the plywood panel in such a way that the nonwoven fabric 2 is formed on the side associated with the plywood panel 10 . The composite sheet 28 is cold pressed for twenty minutes and then hot pressed for five minutes at a temperature of 105 ° C and a pressure of 5 kg / cm ² . As a result, a resin-coated plywood sheet is obtained in which the composite sheet 28 and the plywood 10 are firmly adhered to each other. In addition, no bubbles appear after the hot pressing process is completed.

In the context of a ninth exemplary embodiment, an adhesive is mixed by mixing 20% fluorine with phenolic resin P-82H from AICA KOGYO CO., LTD. receive. This adhesive is applied to the surface of a wood composed of wooden discs with a thickness of 17.2 mm from LOUSIANA-PACIFIC CORPORA TION. This is done with an amount of 250 g / m ² . A composite layer produced as in the eighth exemplary embodiment is fastened to the wooden plate with a non-woven fabric arranged therein and facing the wooden plate.

The composite sheet is cold pressed for twenty minutes and then hot pressed for seven minutes at a temperature of 110 ° C and a pressure of 5 kg / cm ² . The result is a resin-coated wooden panel with a composite layer that adheres firmly to a wooden panel made of wooden discs. The surface of the wooden plate is smooth and firm. In addition, there are no bubbles when the hot pressing process is completed.

To produce a tenth embodiment, 20% fluorine with melamine-urea resin UM-82 from AICA KOGYO CO., LTD. mixed into an adhesive. The adhesive is applied to a nine-ply South Sea mahogany wood with a thickness of 1.3 mm and 200 g / m ² . The layers of wood are applied to a curved wooden base of type R 600 in such a way that the respective wood fibers overlap at right angles. Composite layers 28 produced according to the eighth exemplary embodiment are applied to both surfaces of a group of wooden layers by means of the same adhesive 11 . The nonwoven fabric 2 is on the side facing the wood layers. The Verbundla conditions 28 are connected by pressure to the curved wooden base. The pressure is applied by means of electrode plates which simultaneously heat the outer surfaces with high frequency. The pressure is about 5 kg / cm ² , the hot pressing process takes twenty minutes with an internal temperature of 80-100 ° C.

As a result, the adhesive 11 is fully cured and it holds a resin-coated plywood R 600 with a thickness of about 12 mm, the two surfaces of which are coated with a polyolefin resin film 1 as shown in FIG. 6.

An eleventh embodiment is made as the eighth embodiment, with the exception that a nonwoven fabric type 805-20 from MIKI TOKUSHU PAPER MFG. CO., LTD. with 20 g / m ² is used. The result is a resin-coated plywood with outstanding properties as concrete formwork.

To produce a twelfth embodiment, 20% fluorine with phenol-melamine resin of the type P-85 from AICA KO GYO CO. LTD. used. This adhesive is applied to the surface of a composite layer produced according to the eighth embodiment. The nonwoven fabric is formed on the side assigned to the wood. The adhesive is applied at 200 g / m ² .

Furthermore, a plate coated with adhesive is glued to the surface. This plate is coated with the same adhesive with which the composite layer is made. The composite sheet is hot pressed for 15 minutes at a temperature of 145 ° C and a pressure of 15 kg / cm ² . The result is a resin-coated chipboard with a thickness of 15 mm and outstanding properties as concrete formwork.

As a thirteenth exemplary embodiment, a resin-coated, Board containing disc parts such as the twelfth embodiment example produced, except that instead of Wood chips or small pieces of wood are used will. As a result, a resin-coated, made of wood plate Chen existing board with a thickness of 15 mm, the properties for use as concrete formwork are enough.

In a fourteenth embodiment, 10% fluorine with melamine-urea resin of the type UM-82 from AICA KOGYO CO., LTD. mixed into an adhesive. This adhesive is applied to both sides of a five-ply South Sea mahogany plywood with a thickness of 2.4 mm at 200 g / m ² . The Holzschich th superimpose each other in such a way that their wood fibers are arranged at right angles one above the other. The same adhesive is further applied to the outer surface of a group of wood layers. A composite layer as in the eighth exemplary embodiment is then brought onto the wood layers in such a way that the nonwoven fabric faces the wood layers. The composite layers are hot pressed for four minutes at a temperature of 120 ° C and a pressure of 15 kg / cm ² .

As a result, a resin-coated plywood with overlay properties for use as concrete formwork Furthermore, occur after the end of the hot pressing process no blister problems due to water leaking from the wood steam on.

The production of a composite layer is described below with reference to FIG. 7.

High-density polyethylene LZ0139 from SHOWA DENKO KABUSHIKI KAISHA is used as the polyolefin resin 31 . ELTAS N-5040 from ASAHI CHEMICAL INDUSTRY CO., LTD. used.

The polyolefin resin 31 is applied to the nonwoven fabric 2 in a curtain shape via an extruder 4 with a T nozzle at a temperature of 310 ° C. and a thickness of 50 μm. The nonwoven fabric 2 is conveyed at a speed of 50 m per minute. The polyolefin resin 31 and the nonwoven fabric 2 are pressed together between a pressure roller 5 and a cooling / pressure roller 6 . As a result, the polyolefin resin 31 is cooled and solidified in a molten state, penetrating between the fibers of the nonwoven fabric 2 . From the cooling rollers 7 , the polyolefin resin 31 is further cooled, where a composite layer 38 with a cloth-shaped polyolefin resin 31 and a nonwoven fabric 2 firmly connected to the polyolefin resin 31 forms. The composite layer 38 is wound up by a winding roll 9 .

Referring now to FIG. 8, a method for making a resin-coated board using the composite sheet 38 previously discussed will be described.

As a wooden plate 10 , a commercially available, five-ply wooden plate with a thickness of 12 mm is used. A mixture of 10% fluorine and melamine-urea resin UM-82 from AICA KOGYO CO., LTD serves as the adhesive. This adhesive is a reactive curing adhesive 11 .

The adhesive 11 is applied to the upper surface of the plywood at 200 g / m ² . The composite layer 38 is then applied to the plywood 10 such that the nonwoven fabric 2 is arranged on the side facing the plywood 10 . The composite layer 38 is cold pressed for twenty minutes and then hot pressed for five minutes at a temperature of 150 ° C and a pressure of 5 kg / cm ² . As a result, a resin-coated plywood with a composite layer 38 and a plywood panel 10 is obtained, the composite layer 38 and the plywood panel 10 being firmly connected. Furthermore, there are no bubbles at the end of the hot pressing process.

To produce a sixteenth embodiment, 20% fluorine with phenolic resin P-82H from AICA KOGYO CO., LTD. mixed into an adhesive. This adhesive is applied to the upper surface of a wood consisting of wood chips with a thickness of 17.2 mm from LOUISIANA-PACIFIC CORPORATION. The adhesive is applied at 250 g / m ² . A composite layer produced as in the fifteenth exemplary embodiment is fastened to the wood consisting of small wooden plates, where the nonwoven fabric is arranged on the side facing the wood. The composite sheet is cold pressed for twenty minutes and then hot pressed for seven minutes at a temperature of 110 ° C and a pressure of 5 kg / cm ² . As a result, a resin-coated wood board is obtained, the composite layer and plate containing wooden board are firmly connected to each other and the surface is smooth and firm. In addition, no Bla sen arise at the end of the hot pressing process.

To produce a seventeenth embodiment, 20% fluorine with melamine-urea resin UM-82 from AICA KOGYO CO., LTD. used. Both surfaces of a nine-ply South Sea mahogany wood with 1.3 mm thickness are coated with 200 g / m ² . The layers of wood are applied to a curved wooden support of the R 600 type, with the wood fibers of the layers running at right angles to each other. A composite layer produced as in the tenth embodiment is applied to both surfaces of a group 10 of wood layers by means of the same adhesive 11 , the nonwoven fabric 2 being formed on the side facing the wood layers.

The composite layers 38 are connected by applying pressure to the bent wooden support. This is done by means of electrode plates that heat the outer surfaces with high frequency. The pressure is almost 5 kg / cm ² . The hot pressing process takes twenty minutes and the temperature inside is around 80-100 ° C.

As a result, the adhesive 11 is fully cured, thereby producing a resin-coated plywood sheet of the type R 600 about 12 mm thick, the surfaces of which are provided with a polyolefin resin as shown in FIG. 9.

An eighteenth embodiment is made like the fifteenth embodiment, except that the nonwoven fabric BEMLIESE JF-404 from ASAHI CHEMICAL INDUSTRY CO., LTD. with 40 g / m ² is used. The result is a resin-coated plywood panel with outstanding properties as concrete formwork.

To produce a nineteenth exemplary embodiment, type 805-20 from MIKI TOKUSHU PAPER MFG is used as nonwoven fabric 2 . CO., LTD. with 20 g / m ² used. As polyolefin resin 31 polypropylene LR510 from SHOWA DENKO KABUSHIKI KAISHA is used.

According to the illustration in FIG. 7, the polyolefin resin 31 is conveyed onto the nonwoven fabric 2 in a curtain shape by an extruder 4 with a T nozzle. This happens at a temperature of 300 ° C and with a thickness of 70 µm. The nonwoven fabric 2 is conveyed there at a speed of 50 m per minute. The polyolefin resin 31 and the nonwoven fabric 2 are pressed together between egg ner pressure roller 5 and a cooling / pressure roller 6 .

The polyolefin resin 31 is then cooled and solidified in the molten state, penetrating gaps or spaces between the fibers of the nonwoven. By the cooling rollers 7 , the polyolefin resin 31 is further cooled, whereby a composite layer 38 is formed, in which cloth polyolefin resin 31 and the nonwoven fabric 2 are firmly connected or integrated. The composite layer 38 is wound up on a take-up roll 9 .

An adhesive is made by mixing 20% fluorine with Phenol-Me lamin resin P-85 from AICO KOGYO CO., LTD. produced. This adhesive is applied to one side of the nonwoven fabric at 200 g / m ² , which creates the composite layer.

Furthermore, an adhesive coated platelets - this is the same adhesive as the position for the manufacture of the composite sheet was used - applied to the surface and the composite sheet is for fifteen minutes at a temperature of 145 ° C and a pressure of 15 kg / cm ² hot pressed. As a result, a blind flooring chipboard is produced, the surface of which is impermeable to water. This board is coated with the composite layer. In addition, no bubbles are formed when the hot pressing process is completed.

A twentieth embodiment with a plate included tend board is like the nineteenth embodiment forth with the exception that the board or Plate instead of the pieces of wood contains wooden chips. In the Er The result is a resin-coated, wooden plate containing Get plate with 15 mm thickness, which as concrete formwork over has outstanding properties.

As the twenty-first embodiment, a resin-coated board containing wood chips is to be mentioned, which is produced like the twentieth embodiment, with the exception that the nonwoven fabric is produced as follows. By spraying a twenty-fold diluted solution of ethylene vinyl acetate resin emulsion EF200 from SHOWA HIGHPOLYMER CO., LTD. on a wet nonwoven 805-20 from MIKI TOKUSHU PAPER MFG. CO., LTD. with a thickness of 20 g / m ² and an application rate of 20 g / m ² and then drying the whole, the nonwoven fabric is produced. The result is a resin-coated plate containing wood chips with further improved water resistance.

To produce a twenty-second embodiment, a resin is mixed by mixing 10% fluorine with melamine-urea resin UM-82 from AICA KOGYO CO., LTD. produced. The adhesive is applied to both surfaces of a five-ply south-sea mahogany laminate with a thickness of 2.4 mm and 200 g / m ² . The layers of the laminate overlap one another in such a way that their fibers run at right angles to one another. The same adhesive is applied to the outer surfaces of a group of wood layers with the same amount, composite layers produced according to the nineteenth embodiment being laid on and the nonwoven fabric being arranged on the side facing the wood layers. The composite layers are hot pressed for four minutes at a temperature of 120 ° C and a pressure of 15 kg / cm ² .

As a result, using a resin-coated plywood board outstanding properties for use as concrete formwork receive. In addition, arise at the end of the hot press no bladder problems due to water steamy.

To produce a twenty-third embodiment, a two-layer extruder is used instead of the extruder shown in FIG. 7. The extruder serves to discharge the adhesive polyolefin copolymerization resin and the polyolefin resin onto the nonwoven fabric.

SHOLEX LZ0139 from SHOWA DENKO is used as the polvolefin resin KABUSHIKI KAISHA used. As an adhesive polyolefin copolyme ER resin ER 420H from SHOWA DENKO KA BUSHIKI KAISHA used. Finally, BEM READ WP252 from ASAHI CHEMICAL INDUSTRY CO., LTD. use det.

The adhesive polyolefin copolymerization resin is coated with a Thickness of 30 µm and the polyolefin resin with a thickness of 70 µm curtain-shaped through the two-layer extroder with one Ge total thickness of 100 µm and at a temperature of 290 ° C applied to the nonwoven in a slope. Is located the adhesive polyolefin copolymerization resin on the Nonwoven side. The nonwoven is with a Ge promoted speed of 50 m per minute. The whole will pressed between a pressure roller and a cooling pressure roller. Then the adhesive polyolefin copolymerization resin in molten state cooled and solidified, being in Gaps or spaces between the fibers of the fleece material penetrates. Then the whole thing is done by cooling rollers  further cooled, creating a cloth-like composite layer made of polyo lefin resin and nonwoven fabric in an integrated form. The Polyolefin resin and the nonwoven fabric are by means of the glue Benden polyolefin copolymerization resin bonded together. The composite layer is finally wound on a take-up roll.

The following is the manufacture of a resin coated panel described for use in concrete formwork, the previously described composite layer is used.

A mixture of 10% fluorine and melamine-urea resin UM-82 from AICA KOGYO CO., LTD. Serves as the adhesive. This adhesive is applied to both surfaces of a five-ply South Sea mahogany wood with a layer thickness of 2.4 mm at 200 g / m ² . The layers of the wood are superimposed in such a way that the fibers of the wood are arranged at right angles to one another. Furthermore, the same adhesive is applied to the outer surfaces of a group of layers to the same extent. The composite layer produced according to the above description is placed thereon, the nonwoven being arranged on the side assigned to the wooden layers. The composite layers are hot pressed for four minutes at a temperature of 110 ° C. and a pressure of 15 kg / cm ² .

The result is a resin-coated plywood board with outstanding properties as a panel for cement boarding With regard to water vapor occurring when the Hot pressing process no problems occur.

In the preceding description, the invention is Teaching described using exemplary embodiments only that clarify the teaching of the invention, but do not restrict. The teaching according to the invention is excluded Lich limited by the claims.

Claims (16)

1. A process for producing a resin-coated plate, characterized by the following process steps:
Placing a molten, adhesive polyolefin copolymerization resin ( 3 ) between a polyolefin resin film ( 1 ) and a nonwoven fabric ( 2 );
Creating a composite layer ( 8 ) by attaching the polyolefin resin film ( 1 ) to the nonwoven fabric ( 2 ) by applying pressure and then cooling, the nonwoven fabric ( 2 ) on one side of the polyolefin resin film ( 1 ) by the adhesive polyolefin Copolymerization resin ( 3 ) is attached;
Applying the composite layer ( 8 ) to a wooden board ( 10 ) by gluing with the nonwoven fabric ( 2 ), the nonwoven fabric ( 2 ) being arranged on the side facing the wooden board ( 10 ); and
Press the composite layer ( 8 ) to connect the composite layer ( 8 ) with the wooden plate ( 10 ). 2. The method according to claim 1, characterized in that the wooden plate ( 10 ) consists of plywood with a plurality of laminated wood layers and that for connecting the composite layer ( 8 ) with the plywood, the composite layer ( 8 ) on the outermost surface of a group Laminated wood layers are applied by heat setting and subsequent hot pressing, whereby the heat layers and hot pressing - outside the manufacturing process of the plywood - also simultaneously connect the wood layers of the plywood. 3. The method according to claim 1, characterized in that the wooden plate ( 10 ) is designed as a particle board or as a disc plate with a plurality of solidified particles and that for connecting the composite layer ( 8 ) with the particle board or disc chenplatte on the surface of a group of Layer containing wood particles, the composite layer ( 8 ) is applied by thermofixing and subsequent hot pressing, with the thermofixing and hot pressing - outside the manufacturing process of the chipboard or the chipboard - at the same time the chipboard or chipboard being hardened and shaped. 4. Process for producing a resin-coated plate, characterized by the following process steps:
Oxidation of one side of a polyolefin resin film ( 1 );
Producing a composite layer ( 8 ) by connecting a nonwoven ( 2 ) to the oxidized side of the polyolefin resin film ( 1 ) using a first adhesive ( 11 );
Applying the composite layer ( 8 ) to a wooden panel using a second adhesive ( 11 ), the nonwoven fabric ( 2 ) being arranged on the side facing the wooden panel ( 10 ); and
Press the composite layer ( 8 ) to connect the composite layer ( 8 ) with the wooden plate ( 10 ). 5. The method according to claim 4, characterized in that the Polyolefin resin film is a biaxially oriented polypropylene film having. 6. The method according to claim 4 or 5, characterized in that the wooden plate ( 10 ) consists of plywood with a plurality of laminated wood layers and that for connecting the composite layer ( 8 ) with the plywood, the composite layer ( 8 ) on the outermost surface of a group Laminated wood layers are applied by heat setting and subsequent hot pressing, whereby the heat layers and hot pressing - outside the manufacturing process of the plywood - also simultaneously connect the wood layers of the plywood. 7. The method according to claim 4 or 5, characterized in
that the wooden plate ( 10 ) is designed as a chipboard or as a small plate with a large number of solidified particles
and that the composite layer ( 8 ) is applied to the surface of a layer containing a group of the wood particles by connecting the composite layer ( 8 ) with the chipboard or chipboard by heat setting and subsequent hot pressing, whereby by heat setting and hot pressing - outside the manufacturing process of the chipboard or the slice plate - at the same time the chipboard or slice plate is hardened and shaped. 8. Process for producing a resin-coated plate, characterized by the following process steps:
Applying polyolefin resin ( 1 ) to one side of a non-woven fabric ( 2 ) using a laminator;
Forming a composite layer (8) made of a nonwoven fabric and a layer formed on one side of the floating substance (2) polyo Lefin resin layer (3) by connecting the polyolefin resin (1) with the nonwoven fabric (2) under the action of pressure and subsequent ßendem cooling the polyolefin resin ( 1 ) with the non-woven fabric ( 2 );
Applying the composite layer to a wooden plate by gluing with the fleece, the fleece being arranged on the side facing the wooden plate; and
Press the composite layer ( 8 ) to connect the composite layer ( 8 ) with the wooden plate ( 10 ). 9. The method according to claim 8, characterized in that the air gap between the extrusion opening of the Laminiereinrich device and the surface of the non-woven fabric ( 2 ) is dimensioned such that the oxidation of the extruded polyolefin resin ( 1 ) is accelerated. 10. The method according to claim 8, characterized in that the non-woven fabric ( 2 ) is a moist or wet non-woven fabric ( 2 ). 11. The method according to claim 8, characterized in that the non-woven fabric ( 2 ) is impregnated with a resin emulsion of ethylene-vinyl acetate. 12. The method according to claim 8, characterized in that the wooden plate ( 10 ) consists of plywood with a plurality of laminated wood layers and that for connecting the composite layer ( 8 ) with the plywood, the composite layer ( 8 ) on the outermost surface of a group Laminated wood layers are applied by heat setting and subsequent hot pressing, whereby the heat layers and hot pressing - outside the manufacturing process of the plywood - also simultaneously connect the wood layers of the plywood. 13. The method according to claim 8, characterized in that the wooden plate ( 10 ) is designed as a particle board or as a plate with a plurality of solidified particles and that for connecting the composite layer ( 8 ) with the particle board or plate on the surface of a group Layer containing wood particles, the composite layer ( 8 ) is fixed by thermo and subsequent hot pressing is applied, whereby by means of the heat setting and hot pressing - outside the manufacturing process of the chipboard or the chipboard - the chipboard or chipboard is simultaneously hardened and shaped. 14. A process for producing a resin-coated plate, characterized by the following process steps:
Applying adhesive polyolefin copolymerization resin ( 3 ) and polyolefin resin ( 1 ) to one side of a non-woven fabric ( 2 ) using a two-layer extrusion laminator;
Forming a composite layer (8) made of a nonwoven fabric (2) and one on one side of the floating substance (2) and formed thereon a polyolefin resin layer (1) provided polyols fin-Copolimerisationsharzschicht (3) by joining the resin with the nonwoven fabric (2) under pressure and then cooling the resin with the non-woven fabric ( 2 );
Applying the composite layer ( 8 ) to a wooden board ( 10 ) by gluing with the nonwoven fabric ( 2 ), the nonwoven fabric ( 2 ) being arranged on the side facing the wooden board ( 10 ); and
Press the composite layer ( 8 ) to connect the composite layer ( 8 ) with the wooden plate ( 10 ). 15. The method according to claim 14, characterized in that the wooden plate ( 10 ) consists of plywood with a plurality of laminated wood layers and that for connecting the composite layer ( 8 ) with the plywood, the composite layer ( 8 ) on the outermost surface of a group Laminated wood layers are applied by heat setting and subsequent hot pressing, whereby the heat layers and hot pressing - outside the manufacturing process of the plywood - also simultaneously connect the wood layers of the plywood. 16. The method according to claim 14, characterized in that the wooden plate ( 10 ) as a chipboard or as a wooden disc ent-holding wooden plate ( 10 ) with a plurality of solidified Chen part is executed and that for connecting the composite layer ( 8 ) with the chipboard or Plate containing wood slices on the surface of a layer containing a group of wood particles, the composite layer ( 8 ) is applied by heat setting and subsequent hot pressing, whereby the heat setting and hot pressing - outside the manufacturing process of the chipboard or the chipboard - also the chipboard or Disk plate hardened and molded.