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EP2411198A1 - Éléments composites en sandwich - Google Patents

Éléments composites en sandwich

Info

Publication number
EP2411198A1
EP2411198A1 EP10709802A EP10709802A EP2411198A1 EP 2411198 A1 EP2411198 A1 EP 2411198A1 EP 10709802 A EP10709802 A EP 10709802A EP 10709802 A EP10709802 A EP 10709802A EP 2411198 A1 EP2411198 A1 EP 2411198A1
Authority
EP
European Patent Office
Prior art keywords
foam
head
production
casting rakes
mixing
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Withdrawn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
EP10709802A
Other languages
German (de)
English (en)
Inventor
Ralf Köster
Horst-Uwe Jung
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.)
Covestro Deutschland AG
Original Assignee
Bayer MaterialScience AG
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 Bayer MaterialScience AG filed Critical Bayer MaterialScience AG
Priority to EP10709802A priority Critical patent/EP2411198A1/fr
Publication of EP2411198A1 publication Critical patent/EP2411198A1/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Withdrawn legal-status Critical Current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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/461—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length dispensing apparatus, e.g. dispensing foaming resin over the whole width of the moving surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/16—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length between endless belts
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/30—Expanding the moulding material between endless belts or rollers
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads

Definitions

  • the invention relates to a device for optionally simultaneous and optionally uniform application of foaming reaction mixtures to a substrate, a process for producing intumescent reaction mixtures, an apparatus for producing sandwich Verbur.dettin and a method for producing foamed sandwich composite elements.
  • the distributor head is described in this context as lying behind the mixing head, then this is to be understood in relation to the flow direction of the material flowing through these two heads. Thus, first the mixing head and then only the distributor head are flowed through.
  • the mixing head can be designed as a dynamic mixer or as a static mixer and serves, in particular, for the intimate mixing of the respective component or of the mixture with the inert gas under elevated pressure.
  • the components After the entry of the inert gas, the components on their way to the distributor head or has the mixture of components on its way to the mixing head to an elevated pressure, which causes an increased discharge of the foaming reaction mixture.
  • the above product qualities are improved.
  • the Giesharken used according to the invention each have a tube-like shape and are each provided with holes, distributed over the entire Harkenin, and the holes are preferred way oriented so that they are at an angle of 75 ° to 105 °, more preferably at right angles (90 °) relative to the lower cover layer.
  • the feed of the reaction mixture into the casting rake takes place either at one end of the rake or in the middle or in an area in between.
  • the casting rakes are arranged transversely, in particular at a 90 ° angle to the production direction of the substrate stationary.
  • the stationary arrangement of the casting rake has the advantage that at the edges of the foam application there is no density compared to other areas of the foam application.
  • the foam application is continuously uniform over the entire width of the substrate.
  • a further preferred embodiment of the present invention consists in that the device comprises at least two, preferably at least three, more preferably three to eight, most preferably three or four equally sized and equal diameter hose lines of the same cross section attached to the distributor head. This ensures that the same amount of raw material per time is introduced into the respective casting rakes (at least two, preferably at least three, more preferably three to eight, most preferably three or four) and thus also applied to the substrate.
  • a distributor head is attached to the mixing head, in which the individual foaming components are mixed together.
  • This distributor head has, for example, at least two, preferably at least three, more preferably three to eight, most preferably three or four hose lines whose length, cross-section and material are preferably all the same.
  • This has the advantage that the foaming behavior of the still liquid reaction mixture at the subsequent impact with the lower cover layer at each impact point has progressed to the same extent, which leads to a particularly uniform foaming of the product produced.
  • This advantage is favored not only by the same length, cross section and material of the hose lines, but also by the fact that the entire mixture to be applied emerges from one and the same mixing head.
  • the hose lines can be arranged and fixed on a rigid frame arranged transversely to the production direction of the conveyor belt over the upper cover layer, in such a way that it optimally supplies the casting rakes with the reaction mixture and ensures uniform application over the width of the lower cover layer.
  • the hose lines and the casting rakes over the lower cover layer are advantageously at a height of 20 to 500 mm and are preferably arranged so that the reaction mixture is applied to the lower cover layer, so that no non-wetted areas between the individual application areas of the respective casting rakes on the lower Cover layer occur.
  • the discharge speed from the casting rakes is in particular 1 to 5 m / sec.
  • the mixing head and the distributor head together with the hose lines can be arranged and fixed in such a way that products can also be produced with a thickness falling in the transverse direction to the production direction of the conveyor belt or with constantly changing thickness ratios. This can be achieved essentially by appropriate configuration of the casting rakes. During foaming, these gaps between the holes close, so that in the desired manner irregular foaming in the height of the products is possible.
  • any known in the art mixing head can be used. However, these must be suitable for the foaming in particular of polyol component and isocyanate component for the production of polyurethane sandwich composite elements.
  • the chemically inert gas can be added to the reaction mixture in the mixing head or one or both reaction components in advance to prevent possible blockage of the hose lines.
  • the chemically inert gas is selected from the group of nitrogen, air, carbon dioxide and noble gases such as argon and helium. Instead of a gas, other components can be added to the reaction components.
  • These substances are selected by way of example from the group of graphite, polyurethane flour, melamine, quartz sand, Al 2 O 3 , talc and nanocomposites such as layered silicates, nanotubes, nanosand and are added to the reaction components, in particular in the mixing head.
  • the material of the distributor head may be selected from the same material as the casting rakes, in particular steel, stainless steel, aluminum and plastics. In any case, the selected material must withstand the usual pressures and temperatures in the range of 20 to 40 ° C prevailing in the mixing head.
  • the geometry of the distributor head is preferably selected so that the distance from the inlet of the distributor to the respective outputs of the hose lines to the holes of the casting rakes is the same length. Furthermore, it is advantageous if the cross section of the distributor head exits is identical for all distributor head outlets. On the other hand, the cross section of the distributor head entrance can be larger than the respective distributor head exits.
  • the application device according to the invention may be part of a further device which is used for the production of sandwich composite elements.
  • the production of polyurethane sandwich panels generally takes place in a continuous process.
  • the panels are produced endlessly on so-called double conveyor belts in thicknesses of usually about 20 to 240 mm. Thicknesses of less than 20 mm and over 240 mm are also possible.
  • Such a double conveyor belt usually consists of a circulating Upper belt for guiding the upper cover layer, a circumferential lower belt for guiding the lower cover layer, a feed device for the upper cover layer, a feed device for the lower cover layer, a molding section within which the polyurethane reaction mixture between the upper cover layer and the lower cover layer foams and reacts , a cutting device for the panel produced and a dosing station with a mixing head for applying the polyurethane reaction mixture to the lower cover layer.
  • a sandwich composite element is understood as meaning a composite element which is composed of at least two outer layers and a core layer located therebetween.
  • core layer all materials known to those skilled in the art can be used. Preference is given to fibreboards made of mineral fibers or rigid foam panels, such as polyurethane or polyisocyanurate (PIR) rigid foam, polystyrene foam, phenolic resin foam.
  • sandwich composite elements consist of at least two outer layers of rigid or flexible material and a core layer of a foam such as a rigid polyurethane foam.
  • PUR rigid foams are to be understood as meaning rigid foams based on polyurethane, polyurea and polyisocyanurate compounds.
  • rigid foams based on polyurethane and / or polyisocyanurate are preferably selected.
  • all compounds known to the person skilled in the art with NCO-containing compounds reactive toward OH compounds such as a) aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates, preferably diphenylmethane diisocyanate (cf.
  • NCO prepolymers prepared from the reaction of polymeric MDI with aliphatic or aromatic polyether polyols or polyester polyols for example 1 to 4 hydroxyl-containing polyether polyols or polyester polyols having a number average molecular weight of 60 to 4000 is possible.
  • Combinations of the cover layers on the respective sides of the panel produced from the abovementioned materials are also suitable as cover layers.
  • the still liquid reaction mixture is applied to the lower cover layer (substrate) by means of the device according to the invention. carried.
  • the now slowly foaming reaction mixture is transported on the lower cover layer by means of a lower belt in the molding section, which is spanned by an upper and lower belt.
  • the foaming reaction mixture reaches the upper cover layer and thus bonds the two outer layers together.
  • the foam solidifies and, after passing through the molding section, is cut to length via a cutting device for cutting the panels thus produced into desired lengths.
  • the homogeneity of the surface is classified by the determination of the perturbation density.
  • the size of the bubble and the number of bubbles are determined on the foam upper side for a range in the size of 200 mm ⁇ 1000 mm and thus the disturbance density is defined as follows:
  • Example 3 Fouling density of the foam tops on metal composite elements produced with a device comprising a mixing head, a distributor head downstream of the mixing head, three hose lines attached to the distributor head and three stationary casting rakes for application of the mixture of raw materials to

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention porte sur un dispositif destiné à appliquer éventuellement simultanément, et éventuellement d'une manière uniforme, des mélanges réactionnels expansibles sur un substrat, sur un procédé de fabrication de mélanges réactionnels expansibles, sur un dispositif de fabrication d'éléments composites en sandwich, ainsi que sur un procédé de fabrication d'éléments composites en sandwich expansés.
EP10709802A 2009-03-25 2010-03-16 Éléments composites en sandwich Withdrawn EP2411198A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10709802A EP2411198A1 (fr) 2009-03-25 2010-03-16 Éléments composites en sandwich

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09004238A EP2233271A1 (fr) 2009-03-25 2009-03-25 Eléments composites en sandwich
EP10709802A EP2411198A1 (fr) 2009-03-25 2010-03-16 Éléments composites en sandwich
PCT/EP2010/001639 WO2010108615A1 (fr) 2009-03-25 2010-03-16 Éléments composites en sandwich

Publications (1)

Publication Number Publication Date
EP2411198A1 true EP2411198A1 (fr) 2012-02-01

Family

ID=40957758

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09004238A Withdrawn EP2233271A1 (fr) 2009-03-25 2009-03-25 Eléments composites en sandwich
EP10709802A Withdrawn EP2411198A1 (fr) 2009-03-25 2010-03-16 Éléments composites en sandwich

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09004238A Withdrawn EP2233271A1 (fr) 2009-03-25 2009-03-25 Eléments composites en sandwich

Country Status (7)

Country Link
US (1) US9242399B2 (fr)
EP (2) EP2233271A1 (fr)
JP (1) JP2012521311A (fr)
CN (1) CN102361737A (fr)
BR (1) BRPI1009531A2 (fr)
RU (1) RU2524395C2 (fr)
WO (1) WO2010108615A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3482904A1 (fr) 2017-11-14 2019-05-15 Covestro Deutschland AG Dispositif variable et procédé d'application d'un mélange de réaction expansible à une couche de revêtement en mouvement

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011001109U1 (de) * 2011-01-07 2011-03-17 Basf Se Vorrichtung zum Auftrag von flüssigen Reaktionsgemischen auf eine Deckschicht
DE102011080906A1 (de) 2011-08-12 2013-02-14 Bayer Materialscience Aktiengesellschaft Vorrichtung zum Auftragen von aufschäumenden Reaktionsgemischen
ES2820870T3 (es) * 2012-01-16 2021-04-22 Covestro Intellectual Property Gmbh & Co Kg Dispositivo para aplicar una mezcla de reacción espumante
EP3576922B1 (fr) 2017-01-31 2021-06-09 Covestro Intellectual Property GmbH & Co. KG Procédé et système de fabrication d'éléments composites en mousse
US20200086337A1 (en) * 2017-01-31 2020-03-19 Covestro Deutschland Ag Method and device for producing foam composite elements
EP3576921A1 (fr) 2017-01-31 2019-12-11 Covestro Deutschland AG Procédé et système de fabrication d'éléments composites expansés
US11685140B2 (en) * 2020-06-05 2023-06-27 Johns Manville Non-wicking underlayment board
US11773586B2 (en) * 2020-06-05 2023-10-03 Johns Manville Non-wicking underlayment board
DE102020008112A1 (de) 2020-09-30 2022-03-31 Kögel Trailer GmbH Isolierpaneel und Vorrichtung zur Herstellung eines Isolierpaneels
DE102020125530A1 (de) 2020-09-30 2022-03-31 Kögel Trailer GmbH Isolierpaneel, Vorrichtung zur Herstellung eines Isolierpaneels und Herstellungsverfahren

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DE1247612B (de) 1965-07-22 1967-08-17 Heinz Suellhoefer Verfahren und Vorrichtung zur fortlaufenden Herstellung von kaschierten Platten aus Polyurethanhartschaum
DE1609668B2 (de) 1966-05-28 1973-01-04 Hoesch Ag, 4600 Dortmund Verfahren zur kontinuierlichen Herstellung von Verbundelementen
US4073839A (en) * 1976-04-19 1978-02-14 The Goodyear Tire & Rubber Company Method of zone pouring foam products
EP0048348A1 (fr) * 1980-09-16 1982-03-31 Ramisch Kleinewefers GmbH Procédé et installation d'enduction uniforme de matériaux en bandes par des liquides, des bains ou des pâtes
DE3102132A1 (de) * 1981-01-23 1982-08-26 Phoenix Ag, 2100 Hamburg Vorrichtung zum herstellen eines duennen beschichtungsfilmes auf gewebe
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EP2125323B1 (fr) * 2007-02-28 2015-08-19 Basf Se Procédé de fabrication d'éléments composites sur la base de mousses à base d'isocyanate
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3482904A1 (fr) 2017-11-14 2019-05-15 Covestro Deutschland AG Dispositif variable et procédé d'application d'un mélange de réaction expansible à une couche de revêtement en mouvement
WO2019096733A1 (fr) 2017-11-14 2019-05-23 Covestro Deutschland Ag Dispositif variable et procédé destiné à appliquer un mélange réactionnel expansible sur une couche de recouvrement en mouvement

Also Published As

Publication number Publication date
BRPI1009531A2 (pt) 2016-03-15
CN102361737A (zh) 2012-02-22
WO2010108615A1 (fr) 2010-09-30
RU2011142820A (ru) 2013-04-27
EP2233271A1 (fr) 2010-09-29
RU2524395C2 (ru) 2014-07-27
US20120141673A1 (en) 2012-06-07
US9242399B2 (en) 2016-01-26
JP2012521311A (ja) 2012-09-13

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