EP1426525B1 - Panneau de coffrage spécialement adapté à recevoir des clous - Google Patents

Panneau de coffrage spécialement adapté à recevoir des clous Download PDF

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Publication number
EP1426525B1
EP1426525B1 EP03023823A EP03023823A EP1426525B1 EP 1426525 B1 EP1426525 B1 EP 1426525B1 EP 03023823 A EP03023823 A EP 03023823A EP 03023823 A EP03023823 A EP 03023823A EP 1426525 B1 EP1426525 B1 EP 1426525B1
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EP
European Patent Office
Prior art keywords
layer
hmpp
side face
shuttering
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP03023823A
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German (de)
English (en)
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EP1426525A1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Doka Industrie GmbH
ILPA Industria Legno Casotti Srl
GOR Applicazioni Speciali SpA
Original Assignee
Doka Industrie GmbH
ILPA Industria Legno Casotti Srl
GOR Applicazioni Speciali SpA
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Publication date
Application filed by Doka Industrie GmbH, ILPA Industria Legno Casotti Srl, GOR Applicazioni Speciali SpA filed Critical Doka Industrie GmbH
Publication of EP1426525A1 publication Critical patent/EP1426525A1/fr
Application granted granted Critical
Publication of EP1426525B1 publication Critical patent/EP1426525B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/04—Forming boards or similar elements the form surface being of wood
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics

Definitions

  • the present invention relates to a formwork panel, in particular for concrete formwork, comprising a plate-shaped core having wood components and having front and rear side surfaces, a support structure in which the plate-shaped core is mounted, and at least one layer of wood flour filled polypropylene (HMPP), which is mounted at least on a side surface of the plate-shaped core. It also relates to the use of a composite panel comprising a plate-shaped core and at least one layer of HMPP as a formwork panel. Furthermore, the invention relates to the use of a HMPP layer to improve the nailability of a formwork panel.
  • HMPP wood flour filled polypropylene
  • concrete formwork consists of formwork panels supported by a supporting structure of wood and / or steel components.
  • the shuttering panels form the negative mold of the later concrete surfaces. Their basic technical functions are the formation of a dense surface as well as the immediate absorption of the fresh concrete pressure.
  • the formwork panels guide the area-acting fresh concrete pressure in the support structure, which usually consists of formwork beams with straps in the wall or Jochlinin and Unterstell SAn or scaffolding in the ceiling.
  • the formwork panels are exposed to considerable bending and shear stresses, but may thereby deform only limited. In addition to these static stresses, shuttering panels must also withstand severe mechanical and chemical stresses as well as the effects of the weather in rough construction site use.
  • Shuttering panels should moreover be well nailable to accommodate a wide variety of parts, e.g. Opening boxes for windows and doors, electrical and other installations, anchoring points, etc., easy to attach to the formwork by nailing.
  • the formwork must neither have too high a resistance against the penetration of the nail, nor should the nail be too easy or too difficult to release from the formwork panel.
  • the damage caused by the nail surface damage should be as low as possible and leave the remaining nail hole no permanent leak in the formwork.
  • the shuttering panel should produce as uniform a concrete surface as possible throughout its life.
  • the concrete surface produced should be as flat as possible and in particular have no elevations, as they are very disturbing in the usual treatment such as fillers, etc. and therefore must be removed consuming.
  • the shuttering panel should still be proportionate to the service life (the possible number of applications) as cost-effective.
  • formwork panels which comprise a plywood core and at least the inside, i. when facing the concrete side facing, have a plastic layer.
  • formwork panels have been proposed in which the wood core is filled with HMPP, i. a wood flour filled polypropylene. Such plates are e.g. described in DE 93 00 109 U1.
  • HMPP wood flour filled polypropylene
  • Such plates are e.g. described in DE 93 00 109 U1.
  • formwork panels with a HMPP layer on the inside meet some of the requirements imposed on formwork panels, these panels are poorly nailable, i. when nailing breaks the HMPP layer and it creates a permanent depression or opening in the layer. As stated above, this leads to an elevation in the concrete surface during concreting and thus causes a high reworking effort when removing the elevations.
  • the openings in the prior art HMPP layer are weak points in which the wood core
  • the formwork panel is unprotected against environmental influences, such as moisture, release agents, concrete components, etc. These environmental influences can lead to damage to the wood core, which on the one hand shorten the life of the formwork panel and on the other hand can lead to a wavy scarf surface, which also affects the quality of the concrete surface.
  • the shuttering panel according to the invention comprises, on a side face of the plate-shaped core, an HMPP layer which, in the longitudinal direction, ie in the direction of extrusion of the HMPP layer, has an elongation at break of at least 4.0%, measured according to ISO R 527, type 1, and / or a Charpy notched impact strength at + 23 ° C of at least 10 kJ / m 2 , measured according to ISO 179, Method 2.
  • the present invention is based on the idea to improve the nailability of the formwork panel in that the mechanical properties of the HMPP layer are set such that an optimal compromise between the ductility or the deformation capacity on the one hand and the strength or hardness of the HMPP layer achieved on the other hand.
  • This field of tension is resolved by the subject matter defined in the independent claims in a novel and surprising manner.
  • the material properties of the HMPP layer according to the invention result in a Self-closing effect in the field of nail holes, since the HMPP layer according to the invention is deformed by a special nail when hammering a nail mainly elastic / plastic. In this way, a brittle fracture of the formwork skin when hammering a nail is avoided, and at the same time an independent (extensive) closing of the nail hole is achieved when pulling the nail.
  • the advantages achieved by the present invention are, in particular, that the formwork panel according to the invention, in contrast to the prior art, has excellent nailability and this also connects with other advantageous properties, such as in particular a high scratch resistance, high durability, high (Bending) stiffness, a low crack and joint formation and a good cleanability.
  • these advantages are achieved by the use of a wood flour filled polypropylene in a very cost effective manner.
  • Under nailability is the property of the formwork panel or the formwork skin understood that the knocking or penetration and possibly removing nails in the formwork leaves no permanent, excessively large openings or depressions in the formwork.
  • the formwork panel according to the invention Due to the excellent nailability of the formwork panel according to the invention on the one hand unevenness, especially projections of the subsequent concrete surface, largely avoided, whereby the cost and the cost of reworking the concrete surface are significantly reduced and their appearance is improved. This is especially important in view of the ever-increasing demands on exposed concrete surfaces.
  • the formwork panel according to the invention is also after numerous Inserts still for the production of high-quality concrete surfaces, such as exposed concrete, can be used.
  • the improved nailability of the formwork panel according to the invention also a significant factor for the life of the formwork panel itself.
  • Nail holes in the formwork are vulnerabilities in which the plate-shaped, wood constituent core of the formwork panel against mechanical influences and environmental influences, such as moisture, concrete components , Release agents, etc., is largely unprotected, which can lead to premature damage, such as a wavy deformation of the formwork panel, and to a reduced life of the same.
  • larger flakes, which extend to the core of the formwork panel have the disadvantage that in the course of further use, a successive enlargement of the damage takes place by the action of water and chemicals.
  • the present invention also has economic advantages in providing a formwork panel which is durable and gives good concrete quality without causing significantly increased manufacturing costs.
  • the stated advantages are achieved according to the invention if the at least one HMPP layer has an elongation at break of at least 4.0% or a Charpy notched impact strength at + 23 ° C. of at least 10 kJ / m 2 in the longitudinal direction.
  • particularly good results are achieved if the at least one HMPP layer has both properties at the same time.
  • the at least one HMPP layer has an elongation at break of at least 6.0% or a Charpy notched impact strength at + 23 ° C. of at least 25 kJ / m 2 in the longitudinal direction.
  • the inventors have found that some properties of the at least one HMPP layer, such as its surface hardness, and thus its scratch resistance, can be compromised with excessively high elongation at break values. According to one embodiment of the present invention, therefore, the elongation at break of at least one HMPP layer of the formwork panel according to the invention is not more than 20.0%.
  • the formwork has a particularly good nailability with further advantageous other properties and costs.
  • the at least one HMPP layer has a Charpy notched impact strength at a temperature of -8 ° C of at least 8 kJ / m 2 , preferably at least 20 kJ / m 2 having.
  • the Charpy notched impact strength at a temperature of + 80 ° C is at least 7 kJ / m 2 , preferably at least 18 kJ / m 2 . It should be noted that shuttering panels in direct sunlight on the construction site easily reach temperatures well above those of the ambient air. Possible impairments of the concrete quality and / or the durability of the formwork panel, which may occur under such conditions, but are avoided by the inventive design of the formwork panel.
  • the inventors have found that highly inhomogeneous properties of the at least one HMPP layer can also affect the nailability of the formwork panel. For this reason, according to a development of the formwork panel according to the invention, it is preferred that the abovementioned properties according to the invention in the transverse direction (perpendicular to the extrusion direction in the plane of the HMPP layer) are less than 20%, particularly preferably less than 10%, of deviate from those in the longitudinal direction, whereby the nailability of the formwork panel is further improved.
  • connection layer is a non-woven, in particular a polypropylene material, or a glass fiber fabric, a synthetic fiber fabric, a natural fiber fabric, a nonwoven, a felt or a mat, since these materials have sufficient durability and strength and use additional (adhesive) means allow an adhesive bond with the side surface. Therefore, it is also provided according to the invention that the connection layer is glued to the wood core, which allows a particularly uniform, durable and easy connection.
  • connection between the bonding layer and the respective HMPP layer is preferably achieved by forming the bonding layer integrally with the respective HMPP layer.
  • this bonding layer may be bonded to the HMPP layer immediately after extrusion of the HMPP layer in calendering to the side of the HMPP layer which later faces the side surface of the plate-shaped core.
  • the formwork panel according to the invention is designed such that the front side surface of the plate-shaped core facing the (to be filled) concrete when using the shuttering panel, while the rear side surface facing away from the concrete. Based on this concept, the HMPP layers can give rise to different additional requirements, depending on which side surface they face.
  • the at least one HMPP layer applied to the front side surface has a thickness of between 0.5 mm and 3 mm, preferably between 1 mm and 2 mm.
  • a facing facing the concrete is provided, which the mechanical occurring Can absorb stresses without causing excessive costs or manufacturing effort.
  • the rear side surface of the formwork panel is generally exposed to slightly lower (mechanical) stresses.
  • the at least one HMPP layer disposed on the rear side surface has a smaller thickness than that on the front side surface.
  • the thickness of the rear side surface facing HMPP layer is at least sufficiently dimensioned so that the rear side surface has a good nailability, is protected against environmental influences and also easy to clean, for example, with a high-pressure cleaner.
  • the at least one HMPP layer attached to the rear side surface has a thickness of between 0.5 mm and 2.0 mm, preferably approximately 1.5 mm.
  • a further improvement in the durability of the formwork panel according to the invention is achieved according to the invention when the at least one HMPP layer applied to the front side surface is provided on its side facing away from the plate-shaped core with a further plastic layer which is preferably made of polypropylene.
  • a further plastic layer which is preferably made of polypropylene.
  • the at least one of the rear side facing HMPP layer is printed or provided with a laminated printed layer, in particular a printed polyolefin film.
  • the imprint has technical information, such as application or safety instructions, and / or aesthetic designs. Also company logos or advertising can be advantageously included in the imprint.
  • the printing on the rear side (facing away from the concrete), it is possible to replace a large number of individual markings and stickers previously provided on formwork panels with a uniform marking or inscription.
  • This initially has the advantage that the application of multiple labels simplified and a release of labels is avoided.
  • the rear side surface also receives an attractive and uniform appearance.
  • the imprint according to the invention may have aesthetic designs. As a result, the shuttering panel, for example, get a design with a high recognition value.
  • the present invention relates to the use of a composite panel according to claim 13 and the use of a HMPP layer according to claim 14, with which the same effects and advantages as with the formwork panel described above can be achieved, wherein preferred embodiments of the HMPP layer used preferred embodiments of the HMPP layer described above with respect to the formwork panel correspond.
  • Fig. 1 shows an exploded perspective view of a preferred embodiment of the formwork panel according to the invention.
  • the formwork panel shown in Fig. 1 comprises a plate-shaped wood core 3, which has a front side surface 5 and a rear side surface 7.
  • the shuttering panel 1 is designed such that the front side surface 5 faces the concrete (to be filled) during use while the rear side surface 7 faces away from the concrete.
  • the plate-shaped core 3 of the formwork panel 1 may comprise at least one of individual wood elements, in particular veneers, wood rods, wood strips, wooden boards or the like, composite layer or more of such layers of preferably inter-crosswise arranged wood elements.
  • the individual wood elements can have any dimensions and thicknesses and in every situation as well as between the layers to be glued together.
  • the plate-shaped core can also consist of one or more wood panels of any kind, such as wood-based panels, wood fiber boards, chipboard, plywood, plywood boards, veneer boards, blockboard etc.
  • the formwork panel 1 is stably supported in a supporting structure in the form of a closed frame 9 to provide increased rigidity to the formwork panel and connect it to adjacent formwork panels or building sections.
  • the frame 9 is preferably formed by a circumferential profile, which may have additional stiffening struts. It is for example made of steel or aluminum, wherein the surface of the frame can be treated in a suitable manner in order to protect it against soiling or to make it easy to clean.
  • the formwork panel according to the invention in any formwork device, which is covered with formwork panels can be used, such as Deckenschaltician, circular formwork and the like.
  • the shuttering panel 1 comprises a first layer of HMPP 11 mounted on the front side surface 5 of the plate-shaped core 3.
  • the features and properties of the HMPP layer will be explained in more detail below.
  • the first HMPP layer 11 in the present embodiment is attached to the front side surface 5 by means of a bonding layer 15 made of, for example, polypropylene, the permanent and firm connection between the front side surface 5 and the connection layer 15 being adhesively bonded with a suitable adhesive is achieved.
  • the connection between the connection layer 15 and the first HMPP layer 11 is preferably achieved in that the connection layer 15 after extruding the first HMPP layer 11 into the still receptive HMPP layer, for example calendering, such that the HMPP layer and the bonding layer are integrally formed.
  • the polypropylene material of the bonding layer is selected so that it can accommodate suitable adhesives and is therefore suitable for adhesive bonding.
  • other materials are advantageously used as a bonding layer 15, for example a glass fiber fabric, a synthetic fiber fabric, a natural fiber fabric, a flow, a felt or a mat, which may also be formed integrally with the first HMPP layer 15.
  • HMPP layer When using special adhesives and / or suitable pretreatment and / or priming of the HMPP layer, it can also be bonded to the plate-shaped core without a connecting layer.
  • the shuttering panel 1 in the present embodiment comprises a second layer of HMPP 13 attached to the rear side surface 7 of the plate-shaped core 3.
  • the second HMPP layer 13 may, in principle, be the same material as the first HMPP layer 11, the features and characteristics of which will be described in more detail below. In many applications, however, it may be sufficient or advantageous in terms of the economy of the shuttering panel 1 that the second, the rear side surface 7 facing HMPP layer 13 is made slightly thinner, since on the rear side surface 7 usually slightly lower stresses occur on the front side surface 5.
  • the connection of the second HMPP layer 13 with the rear side surface 7 is also carried out in the present embodiment by a connection layer 17 analogous to the above-described connection layer 15 on the front side surface 5.
  • the surface of the second HMPP layer 13 facing away from the plate-shaped core 3 is provided with a printed layer or foil 19, which is preferably formed by a polyolefin film.
  • a polyolefin film of the printed layer 19 polypropylene is used in the present embodiment, which is preferably applied by adhesion to the HMPP layer 13 and can also be designed to be self-adhesive.
  • This film 19 is preferably printed on the HMPP layer 13 side facing. It is particularly preferred that the imprint has technical information, such as application or safety instructions, and / or aesthetic designs. Also company logos or advertising can be advantageously included in the imprint.
  • the front HMPP layer 11 is provided with a further, thin polypropylene layer 14 whose thickness may be, for example, in the range of approximately 100 ⁇ m.
  • This polypropylene layer 14 may, for example, be calendered and protects the HMPP layer 11 from external influences, in particular moisture, in order to prevent unwanted swelling of the wood components.
  • the wood flour-filled polypropylene (HMPP) used according to the invention contains as filler a mixture of wood pulp or cellulose pulp.
  • HMPP wood flour-filled polypropylene
  • the polypropylene resin used may be a homopolymer or a copolymer.
  • a suitable polypropylene material is used. It has been found by the inventors that the desired results, in particular the desired nailability, are achieved when the starting material used is a BP RS 250 polypropylene from BP (British Petrol) Chemicals. This polypropylene is incorporated in the course of further processing about 30% by weight of wood fibers, the present invention is not limited to this composition.
  • This composite material is then further processed in a conventional manner to a flat HMPP layer, in particular by extrusion.
  • the definition of the longitudinal direction of the HMPP layer corresponds to the extrusion direction, while the transverse direction is perpendicular thereto.
  • the mechanical properties of the HMPP layer thus prepared and a commercially available formwork panel were evaluated and evaluated by the following methods.
  • the commercially available formwork panel is the formwork panel described in the aforementioned DE 199 32 335 A1, which is based on a Solvay Eltex HL 001 P type plastic.
  • Nailability is the area of an opening in the HMPP layer that remains after penetration and removal of a nail (expressed in mm 2 ).
  • the nailability was determined with a device in which the plastic layer, without the wood core, clamped in the present example with the connecting layer plan. The results are not significantly affected by the bonding situation.
  • a mandrel customary in the construction industry for the attachment of built-in parts mandrel is driven with a diameter of about 4 mm in the plastic layer by means of a defined pulse from the side to be attached to the plate-shaped core.
  • the mandrel is held axially freely displaceable in a guide substantially perpendicular to the extension of the plastic layer. Subsequently, a ball with a weight of 0.9 kg, which is guided in a tube, dropped onto the head of the mandrel in its axial direction, wherein the drop height is 1000 mm. The impact impulse of the ball drives the mandrel through the plastic layer. Finally, the mandrel is pulled out of the plastic layer in the axial direction.
  • the nailability of the plastic layer is judged by the visual appearance of the mechanical damage and the rupture is measured, the result being expressed in mm 2 and averaged over 10 nail holes in the present example.
  • the formwork panel according to the invention is clearly superior to the conventional formwork panel in terms of nailability.
  • This result results in particular from the excellent mechanical properties of the HMPP layer according to the invention, especially the improved elongation at break as well as the improved Charpy impact value.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Laminated Bodies (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (16)

  1. Panneau de coffrage (1) pour fabriquer des ouvrages porteurs en béton et en béton armé, pouvant être posé dé préférence en une construction porteuse (9), comprenant :
    un noyau (3) en forme de plaque, présentant des composants en bois et ayant une face latérale avant (5) et une face latérale arrière (7)
    au moins une couche en HMPP (polypropylène chargé par de la farine ou sciure de bois) (11 ; 13 ; 11, 13), montée au moins sur une face latérale (5 ; 7 ; 5, 7) du noyau en forme de plaque,
    caractérisé en ce que
    la au moins une couche en HMPP (11 ; 13 ; 11, 13), en particulier la au moins une couche en HMPP (11) tournée vers la face latérale (5) avant, présente un allongement à la rupture d'au moins 4,0 % et/ou une résilience à l'essai de Charpy à +23°C d'au moins 10 kJ/mm2 en direction longitudinale.
  2. Panneau de coffrage selon la revendication 1, caractérisé en ce que la au moins une couche en HMPP (11 ; 13 ; 11, 13), en particulier la au moins une couche en HMPP (11) tournée vers la face latérale avant (5), présente un allongement à la rupture dans la fourchette de 4,0 à 20,0 %.
  3. Panneau de coffrage selon la revendication 1 ou 2, caractérisé en ce que la au moins une couche en HMPP (11 ; 13 ; 11, 13), en particulier la au moins une couche en HMPP (11) tournée vers la face latérale avant (5), présente une résilience à l'essai de Charpy à +23°C d'au moins 25 et de préférence d'au moins 40 kJ/m2.
  4. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce que la au moins une couche en HMPP (11 ; 13 ; 11, 13), en particulier la au moins une couche en HMPP (11) tournée vers la face latérale avant (5), présente une résilience à l'essai de Charpy à -8°C d'au moins 8 kJ/m2.
  5. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce qu'au moins une couche en HMPP (11 ; 13 ; 11, 13), en particulier la au moins une couche en HMPP (11) tournée vers la face latérale avant (5), présente une résilience à l'essai de Charpy à +80°C d'au moins 7 kJ/m2.
  6. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce que en ce que la au moins une couche en HMPP (11 ; 13 ; 11, 13) est appliquée sur la face latérale (5 ; 7 ; 5, 7) respective du noyau (3) en forme de plaque, au moyen d'une couche de liaison (15 ; 17 ; 15, 17).
  7. Panneau de coffrage selon la revendication 6, caractérisé en ce que la couche de liaison (15 ; 17 ; 15, 17) est respectivement un matériau non tissé, en particulier un matériau à base de propylène, ou bièn un tissu de fibres de verre, un tissu de fibres synthétiques, un tissu de fibres naturelles, un matelas de fibres, un feutre ou une natte, la couche de liaison étant de préférence formée d'une seule pièce avec la couche en HMPP (11 ; 13 ; 11, 13) respective.
  8. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce que la couche en HMPP, respectivement la couche de liaison (15 ; 17 ; 15, 17), est collée à la face latérale (5 ; 7 ; 5, 7) respective du noyau (3) en forme de plaque.
  9. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce que la au moins une couche en HMPP (11) appliquée sur la face latérale avant (5) présente une épaisseur dans la fourchette entre 0,5 mm et 3 mm, de préférence entre 1 mm et 2 mm.
  10. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce que la au moins une couche en HMPP (11) appliquée sur la face latérale avant (5) est munie, sur sa face opposée au noyau (3) en forme de plaque, d'une couche en matière synthétique (14) supplémentaire, formée de préférence en polypropylène.
  11. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce que la au moins une couche en HMPP (13) appliquée sur la face latérale arrière présente une épaisseur dans la fourchette entre 0,5 mm et 2 mm, de préférence de 1,5 mm.
  12. Panneau de coffrage selon l'une des revendications précédentes, caractérisé en ce qu'au moins l'allongement à la rupture, la résilience à l'essai de Charpy à 23°C ou la résilience à l'essai de Charpy à -8°C ou à +80°C de la au moins une couche en HMPP (11 ; 13 ; 11, 13), en direction transversale, diffère de moins que 20 %, de préférence de moins que 10 %, de celle mesurée en direction longitudinale.
  13. Panneau de coffrage selon l'une des revendications précédentes caractérisé en ce que la au moins une couche en HMPP (13) tournée vers la face latérale arrière est imprimée ou munie d'une couche (19) imprimée, appliquée par scellage.
  14. Utilisation d'une plaque composite, comprenant un noyau (3) en forme de plaque, présentant des composants en bois, et une face latérale avant (5) et une face latérale arrière (7), et au moins une couche en HMPP (11 ; 13 ; 11, 13), appliquée au moins sur une face latérale (5 ; 7 ; 5, 7) du noyau (3) en forme de plaque, et un allongement à la rupture d'au moins 4,0 % et/ou une résilience à l'essai de Charpy à +23°C d'au moins 10 kJ/mm2 en direction longitudinale, en tant que panneau de coffrage (1), en particulier pour des coffrages de béton.
  15. Utilisation d'une couche en HMPP (11 ; 13 ; 11, 13) ayant un allongement à la rupture d'au moins 4,0 % et/ou une résilience à l'essai de Charpy à +23°C d'au moins 10 kJ/mm2 en direction longitudinale, pour améliorer la clouabilité d'un panneau de coffrage (1), en particulier pour des coffrages de béton.
  16. Panneau de coffrage ou utilisation selon l'une des revendications précédentes, caractérisé en ce que la au moins une couche en HMPP (11 ; 13 ; 11, 13) présente une grandeur d'arrachement de 30 mm2 ou moins.
EP03023823A 2002-12-03 2003-10-20 Panneau de coffrage spécialement adapté à recevoir des clous Expired - Lifetime EP1426525B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10256361A DE10256361B4 (de) 2002-12-03 2002-12-03 Schalungsplatte mit verbesserter Nagelbarkeit und HMPP-Schicht
DE10256361 2002-12-03

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EP1426525A1 EP1426525A1 (fr) 2004-06-09
EP1426525B1 true EP1426525B1 (fr) 2006-04-05

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EP03023823A Expired - Lifetime EP1426525B1 (fr) 2002-12-03 2003-10-20 Panneau de coffrage spécialement adapté à recevoir des clous

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EP (1) EP1426525B1 (fr)
AT (1) ATE322593T1 (fr)
DE (2) DE10256361B4 (fr)
ES (1) ES2260558T3 (fr)

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FI20065497A (fi) * 2006-07-21 2008-01-22 Upm Kymmene Wood Oy Pinnoitettu puulevy, menetelmä sen valmistamiseksi ja sen käyttö
DE102008007015A1 (de) 2007-01-31 2008-08-14 Kögl, Martin Vorrichtung und Verfahren zur Herstellung von Schalungselementen
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DE10256361A1 (de) 2004-07-15
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ES2260558T3 (es) 2006-11-01
EP1426525A1 (fr) 2004-06-09
DE10256361B4 (de) 2006-07-06

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