DE1704781A1 - Heat-weldable foam and process for its production - Google Patents

Heat-weldable foam and process for its production

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Publication number
DE1704781A1
DE1704781A1 DE19671704781 DE1704781A DE1704781A1 DE 1704781 A1 DE1704781 A1 DE 1704781A1 DE 19671704781 DE19671704781 DE 19671704781 DE 1704781 A DE1704781 A DE 1704781A DE 1704781 A1 DE1704781 A1 DE 1704781A1
Authority
DE
Germany
Prior art keywords
powder
thermoplastic
foam
weldable
vinyl acetate
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.)
Pending
Application number
DE19671704781
Other languages
German (de)
Inventor
Pierre Duret
Andre Lecercq
Robert Valat
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.)
Kleber Renolit Plastiques S A
Original Assignee
Kleber Renolit Plastiques S A
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 Kleber Renolit Plastiques S A filed Critical Kleber Renolit Plastiques S A
Publication of DE1704781A1 publication Critical patent/DE1704781A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
    • B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
    • B05D1/24—Applying particulate materials
    • 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
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C08J9/40—Impregnation
    • C08J9/42—Impregnation with macromolecular compounds
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer

Description

PATENiXNWALTJSPATENiXNWALTJS

dipping. H. LEINWEBER dipl-ing. H. ZIMMERMANNdipping. H. LEINWEBER dipl-ing. H. ZIMMERMANN

Poitscheck-Konto: Bank-Konto: Telefon TeJ.-Adr.Poitscheck account: Bank account: Telephone TeJ.-Adr. München 220« Dresdner Bank ag. MOiKhOIi (MII) 241919Munich 220 «Dresdner Bank ag. MOiKhOIi (MII) 241919 München 2, Marlenplatz, Kto.-Nr. M7WMunich 2, Marlenplatz, account no. M7W

z/Lo 170A781z / Lo 170A781

• MOndMn 2, Rotental 7,2.Aufg. (Ku»termann-Pat«age) • MOndMn 2, Rotental 7, 2nd ed. (Ku "termann-Pat" age)

d#n 15. Dezember 1967 d # n December 15, 1967

KLEBEE-RENOLIT PUSTIQUES S.A., Trilport / FrankreichKLEBEE-RENOLIT PUSTIQUES S.A., Trilport / France Warmschweißbarer Schaumstoff und Verfahren zu dessenHeat-sealable foam and process for it HerstellungManufacturing

Die Erfindung -betrifft ein Verfahren zum Schweißbarmachen von Schaumstoffen mit offenen Zellen aus einem Polyurethan, Polyester oder Polyäther, so daß sie mittels bekannter Verfahren, wie Warmschweißen oder elektrisches Hochfrequenzschweißen, mit verschiedenen Trägern verschweißt werden können, sowie in diesem Verfahren behandelte Schaumstoffe.The invention relates to a process for making foams with open cells made of a polyurethane, polyester or polyether weldable so that they are welded to various supports by means of known processes, such as hot welding or electrical high-frequency welding as well as foams treated in this process.

Bekanntlich sind Schaumstoffe, die leicht mit zahlreichen verschiedenen Trägern verschweißt werden können, von großer technischer Bedeutung. Seit langer Zeit schon behandelt man derartige Schaumstoffe mit Thermoplasten, jedoch ist bisher noch kein vollständig befriedigendes Verfahren bekannt.It is known that foams that can be easily welded to a wide variety of supports are preferred great technical importance. Such foams have been treated with thermoplastics for a long time, however no completely satisfactory process is known up to now.

109822/1918 -2-109822/1918 -2-

Es wurde bereits vorgeschlagen, Schaumstoffe mit Flüs-. sigkeiten zu imprägnieren, die Thermoplaste enthalten, oder solche Flüssigkeiten auf Schaumstoffe aufzubringen. Diese Verfahren haben jedoch stets eine gewisse Verfestigung und dadurch, daß Zellen verstopft werden, eine Verringerung der Porosität des behandelten Schaumstoffes zur Folge, gleichgültig in welcher Form - Lösung, organische, nichtflüchtige Dispersion öder wässrige Dispersion - sich die Thermoplaste in der Flüssigkeit befinden. Ferner sind alle diese Verfahren mit verschiedenen Nachteilen verbunden, wie der Entfernung der Flüssigkeit oder der Gelbildung des Plastisols, und wirken sich im allgemeinen ungünstig auf den Schaumstoff aus.It has already been proposed to use foams with liquid. to impregnate liquids that contain thermoplastics, or to apply such liquids to foams. These However, processes always have a certain solidification and, because cells become clogged, a reduction in the Porosity of the treated foam results in whatever form - solution, organic, non-volatile Dispersion or aqueous dispersion - the thermoplastics are in the liquid. Furthermore, all of these procedures associated with various disadvantages, such as the removal of the liquid or the gelation of the plastisol, and work generally adversely affect the foam.

Ferner wurde vorgeschlagen, einen Thermoplast in Form von Pulver auf den Schaumstoff aufzubringen. Dieses Verfahren, bei dem der Thermoplast auf der Oberfläche des* Schaumstoffes bleibt, ermöglicht jedoch keine regelmäßige Verschweißung von ausreichender Festigkeit.It has also been proposed to apply a thermoplastic in the form of powder to the foam. This method, in which the thermoplastic remains on the surface of the * foam, however, does not allow regular welding of sufficient strength.

Erfindungsgemäß wird dieses Problem dadurch gelöst, daß Schaumstoffe zum Zweck des Schweißbarmachens mit einem pulverförmigen Thermoplast behandelt werden.According to the invention this problem is solved in that Foams for the purpose of making them weldable with a powdery one Thermoplastic treated.

-3-109822/1918 -3-109822 / 1918

Bei dem erfindungsgemäßen Verfahren wird ein Thermoplast in Form eines Pulvers verwendet, wovon mindestens 70$ eine Korngröße besitzt, die sich in der durch Siebe mit Maschen von 0,160 mm und 0,063 mm bestimmten Siebstufe befindet (Maße 23 und 19 der Horm AFHOR); diese Siebstufe entspricht 100 300 Maschen im Zoll. Dieses Pulver wird in das Innere des Schaumstoffes so eingebracht, daß er über eine Tiefe von mindestens 2 mm mit diesem imprägniert ist.In the method according to the invention, a thermoplastic is used in the form of a powder, of which at least $ 70 one Grain size, which is in the sieve stage determined by sieves with meshes of 0.160 mm and 0.063 mm (dimensions 23 and 19 of the hormone AFHOR); this sieving stage corresponds to 100-300 meshes in inches. This powder gets into the inside of the Foam introduced so that it is impregnated with this over a depth of at least 2 mm.

Es wurde nämlich festgestellt, daß es von Bedeutung ist, das Pulver ins Innere des Schaumstoffes einzubringen, und daß die Korngröße des Pulvers nicht nur für das Eindringen in den Schaumstoff, sondern auch für das Haftenbleiben am Schaumstoff eine große Rolle spielt. Wenn das Pulver zu grobkörnig ist, bleibt es nicht fest genug haften und fühlt sich unangenehm sandig an, wenn es dagegen zu fein ist, dringt es nicht oder nur schlecht in den Schaumstoff ein. Ein Pulver mit der oben angegebenen Korngröße dagegen dringt leicht und gleichmäßig in den Schaumstoff ein und löst sich durch Absaugen oder Klopfen nur in geringen Mengen ab.Namely, it has been found that it is important to introduce the powder inside the foam, and that the grain size of the powder not only for penetration into the foam, but also for adherence to the foam plays a big role. If the powder is too gritty, it won't stick firmly enough and will feel uncomfortable sandy, if it is too fine, on the other hand, it does not penetrate the foam or penetrates it poorly. A powder with the In contrast, the grain size given above penetrates easily and evenly into the foam and is released by suction or tapping only in small quantities.

Gemäß einer besonders vorteilhaften Ausführungsart der Erfindung, insbesondere für Schaumstoffe, die mit Hochfrequenzenergie verschweißbar sein sollen, verwendet man ein Rlyvinyl-According to a particularly advantageous embodiment of the Invention, especially for foams that should be weldable with high frequency energy, one uses a Rlyvinyl-

109822/1P18 BAD OWS1NAL109822 / 1P18 BAD OWS 1 NAL

chlorid- und Vinylazetatkopolymer mit 3 bis 15 Gew.$ Vinylazetat. Dieses Kopolymer kann plastifiziert sein, vorzugsweise wird jedoch ein nicht plastifiziertes Kopolymer verwendet, da hierbei die Gefahr eines Wanderns des Weichmachers im Schaumstoff vermieden wird.chloride and vinyl acetate copolymers with 3 to 15 weight percent vinyl acetate. This copolymer can be plasticized, but a non-plasticized copolymer is preferably used because this avoids the risk of the plasticizer migrating in the foam.

Wenn der Schaumstoff nur warmschweißbar gemacht werden soll, kann auch ein anderer Thermoplast, wie ein Polyäthylen oder ein Polyäthylenkopolymer, verwendet werden.If the foam is only to be made heat-weldable, another thermoplastic, such as a polyethylene, can also be used or a polyethylene copolymer can be used.

Gemäß einer besonders vorteilhaften Durchfiihrungsart des erfindungsgemäßen Verfahrens wird der Schaumstoff zur Behandlung durch einen Gasstrom geführt, in welchen das Thermoplastpulver in Suspension mitgetragen wird (dieser Vorgang wird im folgenden kurz Fluidisation des Thermoplasts genannt), oder das Thermoplastpulver wird elektrostatisch aufgespritzt. Bei beiden Verfahren dringt das Pulver tief und gleichmäßig in eine Schaumstoffolie ein. Im allgemeinen empfiehlt es sich, das Thermoplastpulver elektrostatisch aufzuspritzen, wenn nur eine einzige Seite der Schaumstoffolie behandelt werden soll, und das Pulver durch Fluidisation einzubringen, wenn beide Seiten der Schaumstoffolie behandelt werden sollen.According to a particularly advantageous embodiment of the method according to the invention, the foam is used for Treatment carried out by a gas flow in which the thermoplastic powder is carried in suspension (this process hereinafter referred to as fluidization of the thermoplastic for short), or the thermoplastic powder is sprayed on electrostatically. In both processes, the powder penetrates deeply and evenly into a foam sheet. In general, it is advisable to spray the thermoplastic powder electrostatically if only one side of the foam sheet is to be treated, and to introduce the powder by fluidization if both sides of the foam sheet are to be treated.

-5-109822/1918 -5-109822 / 1918

Die Menge des Pulvers richtet sich nach der Art der Schaumstoffe, nach dem jeweiligen Verwendungszweck und nach dem verwendeten Thermoplast. Man kann jedoch im allgemeinenThe amount of powder depends on the type of foam, on the intended use and on the thermoplastic used. One can, however, in general

sagen, daß mit einer Menge von 100 bis 300 g/m gute Ergebnisse erzielt werden können.say that good results can be achieved with an amount of 100 to 300 g / m 2.

Auf der beiliegenden Zeichnung ist eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens durch Fluidisation des Pulvers schematisch dargestellt. Bei diesem Durchführungsbeispiel wird ein Schaumstoff aus Polyurethan, und zwar Polyäther mit einem Gewicht von 25 kg/m in Form einer Folie von 10 mm Stärke behandelt.In the accompanying drawing is a device for performing the method according to the invention by fluidization of the powder shown schematically. In this implementation example is a foam made of polyurethane, namely polyether with a weight of 25 kg / m in the form of a Treated foil of 10 mm thickness.

Die Schaumstoffolie 1 ist auf eine Walze 2 aufgerollt. Von dieser Holle wird sie abgerollt und durch den Fluidisationstrog 3 geführt, in dem sie mit dem Thermoplastpulver 4, das sich in einem durch die Leitung 5 zugeführten und die poröse Platte 6 durchquerenden Gasstrom in Suspension befindet, in Kontakt gebracht wird.The foam sheet 1 is rolled up onto a roller 2. It is unrolled from this cave and through the fluidization trough 3 out in which they with the thermoplastic powder 4, which is in a fed through the line 5 and the porous plate 6 traversing gas stream is in suspension, is brought into contact.

Nach dieser Behandlung kann die Folie leicht warmgeschweißt oder mit Hochfrequenz geschweißt werden, sofern der zur Behandlung verwendete Thermoplast, wie Polyvinylchlorid oder seine Kopolymere, einen ausreichenden polaren CharakterAfter this treatment, the film can be easily heat welded or welded with high frequency, provided that the thermoplastic used for treatment, such as polyvinyl chloride or its copolymers, have a sufficiently polar character

INSPECTEDINSPECTED

10 9 8 2 2/1918 "6~10 9 8 2 2/1918 " 6 ~

17CH78117CH781

-G--G-

besitzt und der Träger dieses Schweißverfahren erlaubt. Die hierbei hergestellten Schweißungen zeichnen sich durch Gleichmäßigkeit und Festigkeit aus.and the wearer allows this welding process. The welds produced here are characterized by uniformity and strength.

Die Erfindung ist nicht auf das beschriebene Ausführungsbeispiel beschränkt. Sie läßt sich insbesondere für alle Schaumstoffe mit offenen Zellen verwenden, die aufgrund ihrer Natur nicht warmschweißbar sind, und für solche, die zuvor an einem Träger befestigt wurden.The invention is not limited to the exemplary embodiment described limited. It can be used in particular for all foams with open cells that are due to by their nature are not heat-weldable, and for those that have previously been attached to a carrier.

10 9 8 2 2/1918 . ~7~10 9 8 2 2/1918. ~ 7 ~

Claims (6)

Patentansprüche :Patent claims: 1. Verfahren zum Schweißbarmachen von Schaumstoffen mit offenen Zellen durch Behandlung mit einem Thermoplast in Pulverform, dadurch gekennzeichnet, daß man den pulverförmigen Thermoplasten in den Schaumstoff so eindringen läßt, daß er über eine Tiefe von mindestens 2 mm mit diesem imprägniert ist.1. Process for making foams weldable with open cells by treatment with a thermoplastic in powder form, characterized in that the powdery Lets thermoplastic penetrate into the foam in such a way that it impregnates with it over a depth of at least 2 mm is. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Korngröße des Thermoplastpulvers so gewählt ist, daß sich mindestens 70$ des Pulvers in der durch Siebe mit Haschen von 0,160 mm und 0,063 mm bestimmten Siebstufe befindet.2. The method according to claim 1, characterized in that the grain size of the thermoplastic powder is chosen so that at least $ 70 of the powder in the sieve with hashes of 0.160 mm and 0.063 mm certain sieve stage is located. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Thermoplastpulver im wesentlichen aus einem Polyvinylchlorid- und Vinylazetatkopolymer mit 3 bis 15 Gew.# Vinylazetat besteht.3. The method according to claim 1 or 2, characterized in that the thermoplastic powder consists essentially of one Polyvinyl chloride and vinyl acetate copolymers with 3 to 15 wt. # Vinyl acetate is made. 4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Thermoplastpulver fluidisiert und der Schaumstoff durch das fluidisierte Pulver geführt wird.4. The method according to any one of the preceding claims, characterized in that the thermoplastic powder is fluidized and the foam is passed through the fluidized powder will. -8-109822/ 1918-8-109822 / 1918 5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Thermoplastpulver elektrostatisch aufgebracht wird.5. The method according to any one of claims 1 to 3, characterized in that the thermoplastic powder is electrostatic is applied. 6. Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche 1 bis 5, gekennzeichnet durch einen Fluidistationstrog (3) mit einer sich über dessen gesamten Querschnitt erstreckenden porösen Platte (6), die den Trog in eine untere, an eine Gasquelle angeschlossene Kammer sowie eine obere, das Thermoplastpulver enthaltende Kammer unterteilt, die eine Eintritts- sowie eine Austrittsöffnung für die mit dem Pulver zu imprägnierende Folie aufweist. 6. Device for performing the method according to one of the preceding claims 1 to 5, characterized through a fluidization station trough (3) with a porous plate (6) extending over its entire cross section, which the trough into a lower chamber connected to a gas source and an upper chamber containing the thermoplastic powder Chamber divided, which has an inlet and an outlet opening for the film to be impregnated with the powder. 109822/ 1918109822/1918
DE19671704781 1966-12-16 1967-12-15 Heat-weldable foam and process for its production Pending DE1704781A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR87896A FR1516852A (en) 1966-12-16 1966-12-16 Heat-sealable foam and method of preparation

Publications (1)

Publication Number Publication Date
DE1704781A1 true DE1704781A1 (en) 1971-05-27

Family

ID=8622604

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19671704781 Pending DE1704781A1 (en) 1966-12-16 1967-12-15 Heat-weldable foam and process for its production

Country Status (6)

Country Link
BE (1) BE708070A (en)
DE (1) DE1704781A1 (en)
FR (1) FR1516852A (en)
GB (1) GB1209048A (en)
LU (1) LU55109A1 (en)
NL (1) NL6717017A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729738A1 (en) * 1977-07-01 1979-01-04 Mayser Gmbh & Co ELASTIC PLASTIC BODY AND METHOD FOR ITS MANUFACTURING
DE2951347A1 (en) * 1979-12-20 1981-07-02 Katex Kaschier- und Prägeanstalt GmbH & Co KG Textilveredelung, 4054 Nettetal HIGH-FREQUENCY WELDABLE PLATES AND TRACKS OF PLASTIC FOAM AND METHOD FOR THE PRODUCTION THEREOF

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU505555B2 (en) * 1973-02-20 1979-11-22 Takeji Saito Improving weldability of synthetic foam material
US4056647A (en) * 1975-12-29 1977-11-01 Armstrong Cork Company Powder edge coating for ceiling tile
FR2582569B1 (en) * 1985-05-29 1988-01-29 Plot Michel PROCESS FOR THE MANUFACTURE OF A FLEXIBLE PAD FOR A PRODUCT TO BE DISPLAYED

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2729738A1 (en) * 1977-07-01 1979-01-04 Mayser Gmbh & Co ELASTIC PLASTIC BODY AND METHOD FOR ITS MANUFACTURING
DE2951347A1 (en) * 1979-12-20 1981-07-02 Katex Kaschier- und Prägeanstalt GmbH & Co KG Textilveredelung, 4054 Nettetal HIGH-FREQUENCY WELDABLE PLATES AND TRACKS OF PLASTIC FOAM AND METHOD FOR THE PRODUCTION THEREOF

Also Published As

Publication number Publication date
BE708070A (en) 1968-04-16
FR1516852A (en) 1968-02-05
GB1209048A (en) 1970-10-14
LU55109A1 (en) 1968-03-05
NL6717017A (en) 1968-06-17

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