EP2222467A1 - Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment - Google Patents

Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment

Info

Publication number
EP2222467A1
EP2222467A1 EP08861798A EP08861798A EP2222467A1 EP 2222467 A1 EP2222467 A1 EP 2222467A1 EP 08861798 A EP08861798 A EP 08861798A EP 08861798 A EP08861798 A EP 08861798A EP 2222467 A1 EP2222467 A1 EP 2222467A1
Authority
EP
European Patent Office
Prior art keywords
molded part
films
plastic film
fiber cement
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08861798A
Other languages
German (de)
English (en)
Inventor
Lars Koppelmann
Roland Streng
Joachim Strauch
Markus Salzmann
Peter Kitzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to EP08861798A priority Critical patent/EP2222467A1/fr
Publication of EP2222467A1 publication Critical patent/EP2222467A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/16—Lining or labelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/56—Compression moulding under special conditions, e.g. vacuum
    • B29C2043/561—Compression moulding under special conditions, e.g. vacuum under vacuum conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
    • B29K2709/06—Concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
    • B29L2031/104—Tiles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof

Definitions

  • the invention relates to a method for coating a fiber cement or concrete molding with a plastic film, characterized in that
  • the molded part is arranged and fixed in a capsule, the plastic film being mounted between the capsule wall and the molded part, b) the air in the chamber is evacuated between the plastic film and the molded part, c) the plastic film is heated, d ) a second chamber between the plastic film and the capsule wall with ambient air is released to atmospheric pressure and e) the plastic film is thereby pressed onto the molded part and during this pressing process, a vacuum is maintained.
  • Fiber cement boards and molded parts can be coated with a plastic film using membrane presses.
  • Flat elements panels / panels
  • Flat elements panels / panels
  • Concrete moldings are not coated with plastic films so far.
  • no coating methods are available.
  • Shape, color and surface of fiber cement or concrete moldings can hardly be changed at all afterwards. To give these moldings a special color or surface, these moldings must be painted or soaked. Straight look and features such as feel and weather resistance of fiber cement or concrete moldings often leave much to be desired. Object of the present invention was therefore to find a method that allows a simple and subsequent surface design of the fiber cement or concrete moldings.
  • the chambers A and B are simultaneously or preferably successively subjected to a vacuum. This prevents buckling of the film, or premature contact of the film with the fiber cement or concrete molding.
  • the vacuum in chamber B By releasing the vacuum in chamber B to atmospheric pressure, the film is pressed onto the fiber cement or concrete molding while the vacuum in chamber A is still maintained; Simultaneous coating of the fiber cement or concrete molding with foil on opposite sides - for example, this can be achieved by anchoring the fiber cement or concrete molding in a frame of wood, metal or plastic and centered in the center of the coating chamber by a support at the head ends of the Frame is held.
  • the adhesive can be based either on an aqueous, VOC-free PU base, or on a sprayable (PU) hotmelt, which is applied with a special application gun.
  • the method according to the invention is suitable for two- or more-sided coating of fiber-cement or concrete moldings which were hitherto only accessible to a coating with plastic film in several steps.
  • Fiber cement boards are in particular mineral fiber boards
  • Large-format fiber cement boards for ventilated curtain facades have proven themselves in practice. They consist of a non-flammable, highly compacted material made of cement stone reinforced with fibers, which is resistant to deformation and weathering in the hardened state.
  • the largest share of raw materials is the binding agent Portland Cement, which is made by burning limestone and clay marl.
  • Portland Cement which is made by burning limestone and clay marl.
  • the reinforcing fibers used are synthetic organic polyvinyl alcohol fibers. It is fibers that are similarly used in the textile industry for outerwear and protective fabrics, for nonwovens and for medical sewing threads. Of paramount importance is their physiological safety.
  • fibers serve as filter fibers. They are mainly pulp fibers, as they are also used in the paper industry. There is also air in the form of microscopic pores. This micro pore system creates a frost-resistant, moisture-regulating, breathable and yet waterproof building material. (Planning and application Eternit AG).
  • Fiber cement screed elements are used for damp rooms such as bathrooms and kitchens, eg. B. Perlcon-Floor by Perlite / Knauf, 2 cm thick with shiplap.
  • fiber was mainly asbestos.
  • the harmful asbestos fibers can be released during processing and decomposition of aging materials.
  • Asbestos cement materials must be removed manually (non-destructive).
  • this has been replaced by other fibers, e.g. As glass CFRP or cellulose fibers (cellulose) replaced.
  • products of the companies Eternit AG Germany or Karl Bachl GmbH & CO KG can be used here.
  • the adhesives used are preferably aqueous polyurethane-based systems, both one-component and two-component systems.
  • PU dispersions come into consideration, for example Jowapur® 150.50 may be mentioned here.
  • Zweikomponteklebestoffe come combinations of PU dispersions such as Jowapur® 150.30 with isocyanates such as Jowat® 195.40 in question.
  • adhesives based on acrylate or epoxy resin are also suitable for use.
  • the application of the adhesive may be by conventional methods such as brushing, rolling or spraying, with spraying being particularly preferred.
  • a 20 minute drying time at room temperature following application of the adhesive is sufficient in the systems described.
  • hot melt adhesives which are rolled up, lapped, rolled and sprayed.
  • polyurethane adhesives are used which crosslink with moisture.
  • Suitable plastic films are, in particular, polyvinyl chloride, styrene copolymers, polypropylene, polyvinylidene fluoride, thermoplastic polyurethane (TPU) and polymethyl methacrylate (PMMA). Due to their weather resistance, especially polyvinyl chloride and styrene copolymers such as SAN, AMSAN and in particular ASA have proved suitable for outdoor applications. For example, in the case of the ASA copolymer, the film may be modified by 0.5-30% by weight of a thermoplastic elastomer.
  • thermoplastic elastomer classes are: TPE-O (olefin-based thermoplastic elastomers, predominantly PP / EPDM), TPE-V olefin-based thermoplastic elastomers, predominantly PP / EPDM), TPE-U (urethane-based thermoplastic elastomers), TPE-E (thermoplastic copolyesters) TPE-S (styrene block copolymers, such as SBS, SEBS, SEPS, SEEPS, MBS ) and TPE-A (thermoplastic copolyamides, eg PEBA).
  • SAN, AMSAN, ASA, TPU or PMMA films are particularly preferably used.
  • coextrusion films which have a hard and scratch-resistant cover layer and a softer support layer.
  • Such films can be used in various plain colors as well as printed surfaces.
  • the surface can be structured by different embossing rollers during the extrusion of the film.
  • the two-layer films consist of a carrier layer such as, for example, polystyrene or HIPS and a primer layer, for example based on elastomeric styrene-butadiene block polymers.
  • a carrier layer such as, for example, polystyrene or HIPS
  • a primer layer for example based on elastomeric styrene-butadiene block polymers.
  • an additional adhesive can usually be dispensed with in these cases.
  • the coextruded film is pressed onto the fibreboard in such a way that the adhesion promoter layer comes into direct contact with the plate.
  • the films described in the sections above can be used both in various solid colors and printed surfaces.
  • the surface can be structured by various embossing rollers during the extrusion of the film.
  • the plastic film can act as a primer, which allows easy post-treatment such as brushing, printing, for example, with advertising slogans, etc.
  • Films such as the above-mentioned ASA films can be subsequently changed in color and shape by a suitable post-treatment such as brushing, printing or embossing.
  • the films used have a thickness between 50 and 750 .mu.m, preferably between 100 and 500 .mu.m and more preferably between 200 and 350 .mu.m. They may be prepared from the corresponding granular precursors by the known film production processes, the extrusion process being preferred for cast film production.
  • the films may have been corona treated on one or both sides.
  • the processes described in the literature are suitable for producing the fiber-cement or concrete moldings.
  • the fiber cement board to be coated usually has a dimension of approximately DIN A4 format up to a few square meters.
  • the layer thickness of the fiber cement elements usually ranges from 6 to 25 mm.
  • the plates can be several meters long.
  • the coating according to the invention significantly improves the fiber-cement plate resistance to breakage and residual load-bearing capacity. This is achieved by completely removing air between the plate and the foil, which can not be achieved with conventional lamination processes (this is certainly possible with flat elements).
  • the weather resistance and the feel of fiber cement or concrete moldings can be significantly improved by the coating with plastic films.
  • the coated fiber cement or concrete moldings can be advantageously used for outdoor applications in the construction sector.
  • the moldings come as facade elements, housing for solar collectors, soundproof walls, flower boxes, roof tiles, roof battens, roofing, balcony clothing, etc. in question.
  • the surface modified by the coating is easy to clean.
  • the algae and moss growth as well as the fungal infestation which is already smaller than with uncoated molded parts, can be further minimized.
  • Fiber cement or concrete moldings are usually excellent for the production of, for example, park benches and garden furniture. As already described, a corresponding plastic film can give an attractive appearance. example 1
  • the substrate to be coated on both sides was a fiber cement board made of Pelicoror®, a commercially available, normally hardened fiber cement from Eternit AG.
  • the plate was 120 cm long, 80 cm wide and 8 mm high.
  • the adhesive was first applied.
  • the adhesive used was an aqueous two-component system (consisting of binder and hardener) based on polyurethane, which was prepared immediately before application by mixing the two individual components. To obtain a homogeneous mixture, the mixture was stirred at room temperature for at least 3 minutes using a KPG stirrer. Subsequently, the adhesive was applied to both surfaces and to the 4 edges of the molded part by means of a Walther Pilot spray gun in an amount of approx.
  • the molding was allowed to dry for 20 minutes at room temperature.
  • the fiber cement plate was fixed by a holder on the two head ends (opposite side surfaces) and positioned in the center of the coating capsule.
  • the two plastic films to be applied were in each case mounted between the capsule wall and the molded part. This created in the coating capsule 3 chambers: a chamber between the two plastic films, in the middle of the fiber cement plate was positioned (chamber A).
  • the other two chambers were each between the plastic film and the capsule wall (chamber B, C).
  • plastic film 250 microns were strong, white pigmented Castfo- lien from Luran ® S, the ASA commercially available from BASF Aktiengesellschaft - copolymer used.
  • the adhesive on the top and side surfaces of the molded part was also activated, resulting in a very good adhesion between the adhesive and the plastic film after completion of the process.
  • the coated molded part could be removed from the capsule. The overlapping film passing over the weld was manually removed with a sharp blade.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Finishing Walls (AREA)

Abstract

L'invention concerne un procédé d'application d'une feuille de plastique sur une pièce moulée en béton ou en fibrociment, caractérisé en ce que a) la pièce moulée est placée et fixée dans une capsule, la feuille de plastique étant placée entre une paroi de la capsule et la pièce moulée, b) l'air contenu dans la chambre située entre la feuille de plastique et la pièce moulée est évacué, c) la feuille de plastique est chauffée, d) une deuxième chambre située entre la feuille de plastique et une paroi de la capsule est détendue à la pression atmosphérique avec l'air extérieur et e) la feuille de plastique est pressée contre la pièce moulée, un vide étant maintenu pendant le processus d'application de pression. L'invention concerne également des pièces moulées en béton et en fibrociment enduites par ce procédé.
EP08861798A 2007-12-19 2008-12-19 Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment Withdrawn EP2222467A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08861798A EP2222467A1 (fr) 2007-12-19 2008-12-19 Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07123661 2007-12-19
EP08861798A EP2222467A1 (fr) 2007-12-19 2008-12-19 Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment
PCT/EP2008/067961 WO2009077612A1 (fr) 2007-12-19 2008-12-19 Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment

Publications (1)

Publication Number Publication Date
EP2222467A1 true EP2222467A1 (fr) 2010-09-01

Family

ID=40626614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08861798A Withdrawn EP2222467A1 (fr) 2007-12-19 2008-12-19 Procédé d'application d'un revêtement sur une pièce moulée en béton ou en fibrociment

Country Status (3)

Country Link
US (1) US20100272992A1 (fr)
EP (1) EP2222467A1 (fr)
WO (1) WO2009077612A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422616A1 (de) * 1974-05-10 1975-12-11 Metzeler Schaum Gmbh Vakuumverfahren zur oberflaechenverguetung durch oberflaechenbeschichtung
US4633008A (en) * 1983-03-15 1986-12-30 Mitsubishi Yuka Fine Chemicals Co., Ltd. Anti-oxidant phenol derivatives
US4894102A (en) * 1985-03-04 1990-01-16 Kenneth F. Halls Method for refinishing building panels
JPS6371333A (ja) * 1986-09-12 1988-03-31 Asahi Glass Co Ltd 積層体の製造方法及びその装置
US5813176A (en) * 1995-06-07 1998-09-29 Fontana Paper Mills, Inc. Asphaltic foam
US6358585B1 (en) * 1996-05-14 2002-03-19 Crane Plastics Company Limited Partnership Ectrudable cement core thermoplastic composite
DE19621688A1 (de) * 1996-05-30 1997-12-04 Basf Ag Transparente, nicht-blockende Folie
AU1152201A (en) * 1999-11-02 2001-05-14 Richard Warrington George Method and apparatus for thermoforming of plastic sheets
WO2008135550A2 (fr) * 2007-05-08 2008-11-13 Basf Se Procédé de revêtement des deux faces d'une pièce moulée en un produit mousse dur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009077612A1 *

Also Published As

Publication number Publication date
US20100272992A1 (en) 2010-10-28
WO2009077612A1 (fr) 2009-06-25

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