DE7217075U - Chemiefaser-Doppel-Matte - Google Patents

Chemiefaser-Doppel-Matte

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Publication number
DE7217075U
DE7217075U DE7217075U DE7217075DU DE7217075U DE 7217075 U DE7217075 U DE 7217075U DE 7217075 U DE7217075 U DE 7217075U DE 7217075D U DE7217075D U DE 7217075DU DE 7217075 U DE7217075 U DE 7217075U
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DE
Germany
Prior art keywords
welded
synthetic fiber
fiber mats
strength
sweatband
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
Application number
DE7217075U
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English (en)
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EAH NAUE KG
Original Assignee
EAH NAUE KG
Publication date
Publication of DE7217075U publication Critical patent/DE7217075U/de
Expired legal-status Critical Current

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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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5028—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being textile in woven or non-woven form
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B29C65/505—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined and placed in a recess formed in the parts to be joined, e.g. in order to obtain a continuous surface
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
    • 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
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/128—Stepped joint cross-sections
    • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
    • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
    • 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
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/14—Particular design of joint configurations particular design of the joint cross-sections the joint having the same thickness as the thickness of the parts to be joined
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B29C66/91935—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined lower than said fusion temperature
    • 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
    • B29L2031/732—Floor coverings
    • B29L2031/7324—Mats

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

Hochfest verschweißte, thermoplastische Chemiefasermatten.
Es ist bekannt, Kunststoffplatten und Folien, soweit sie aus thermoplastischem Material bestehen, durch Wärme und Druckeinwirkung miteinander zu verschweißen, indem beheizte Werkzeuge zwischen die Stoßkanten gleitend «τι^ί drückend bewegt werden- Es liegt nahe, auch Chemiefasermatten, soweit deren Fasern thermoplastisch sind, auf gleiche Weise zu verschweißen. Die Praxis zeigt aber, daß diese Schweißverbindung nicht reißfest ist und diese Methode daher nur begrenzt einsetzbar ist. Stoßschweißungen dieser Art gehen beim geringsten Zug auseinander, da nur einzelne Punkte, nämlich sich berührende Fasern miteinander verbunden sind, die wie bei Metallschweißungen
in der nahen Umgebung der Schweißung sehr brüchig geworden sind.
Man hat daher versucht, solche Aufgaben dadurch zu lösen, daß man ein zusätzliches Schweißband benutzte, dessen Schmelzpunkt niedriger ist als das der Fasern. Durch Einwirkung von Wärme wird das niedriger schmelzende Material plastisch und fließt mindestens teilweise zwischen die Faserlücken. Dabei werden eine Anzahl von Faserschlingen vom Schmelzmaterial umflossen. Nach der Erkaltung ist eine Verbindung erzielt, die erheblich besser ist als bei der zuerst beschriebenen Methode. Dennoch kann nicht von einer Verschweißung gesprochen werden, ^s ist nichx mehr a3 s eine Verklebung, die nicht als reißfest angesprochen werden kann.
Man hat daher vielfach eine Verbindung mittels Klebstoffen vorgezogen, wobei man es m der Hand hat, durch Einsatz gewisser Klebstoffmengen die Verbindung zu verbessern.
721701523.11.72
Dabei ist nicht zu vermeiden, daß der Klebstoff mindestens stellenweise durchschlägt, was ebenfalls unerwünscht ist.
Auf der Suche nach einer reißfesten Schweißverbindung hat sich nun überraschend gezeigt, daß eine solche dadurch zu schaffen ist, daß man im Bereich der Schweißung einen etwa 5 cm breiten Streifen aus dem gleichen Material entweder zwischen (bei Überlappungsschweißung) oder unter (bei Stoßverschweißung) die zu verschweißenden Mattenkanten legt, im ganzen Schweißbereich durch Heißluft die Fasern auf Schmelztemperatur bringt und dann die Teile durch Walzendruck zusammenpreßt. Nach dem Erkalten sind «ii3 Matten nicht nur hochreißfest verschweißt, sondern
optisch i3t die Schweißnaht wenigstens bei der Stoß-
verschweißung von oben nicht erkennbar. Bei der Überlappungsschweißung zeigt sich die Schweißnaht nur durch eine Verdichtung der Faserstruktur an. Bei der Stoßverschweißung mit dem Schweißband unter den Mattenkanten ist optisch keine Veränderung feststellbar, wenn die Matten mehr als 7 mm stark sind.
Die Güte der Schweißung nach dieser Methode ist zweifellos darauf zurückzuführen, daß sich die Faserschlingen der Matten vor dem Verschweißen mit den Faserschlingen des Schweißbandes innig verzahnen, in diesem Zustand schmilzen und durch den Druck zu einem mehr oder weniger dichten Band verbinden, welches nach dem Abkühlen in seiner ganzen Breite eine zugfeste Verbindung darstellt.
Da der Heißluftstrom durch Auswahl geeigneter Düsen so gesteuert werden kann, daß nicht nur die an den Oberflächen der zu verschweißenden Bahnen erwärmt werden, sondern der Luftstrahl sich im Gegensatz zu der bisher üblichen Beil- oder Spachtelerwärmung sowohl in das tiefe Fasergefüge als auch seitlich der Schweißstelle erwärmend ausdehnt, findet weder eine örtliche überhitzung noch ein plötzlicher Abbruch der Erwärmung statt,
721707523.1172
so daß dadurch eine Versprödung der der Schweißstelle benachbarten Zone vermieden wird. Überraschenderweise korm man auf der der Verschweißung gegenüberliegenden Oberfläche auch keine Strukturveränderung der Fasern feststellen, was wahrscheinlich darauf zurückzuführen ist, daß die Erwärmung der Fasern bis auf die Gegenseite unterhalb des Schmelzpunktes geblieben ist.
Reißversuche und Vergleiche haben deutlich eine erhebliche Verbesserung der Zugfestigkeit gegenüber den älteren Schweiß- und Klebemethoden ergeben, so daß nunmehr eine Schweißverbindung geschaffen wurde, die hinsichtlich ihrer Festigkeit allen Ansprüchen genügt und optisch rieht wahrnehmbar ist.
Die beifolgenden Zeichnungen zeigen:
Fig. la die Einzelteile und ihre Ausbildung bei einer Überlappungsverschweißung, wobei mit 1 und 3 an den Kanten verdichtete Chemiefasermatten darstellen und mit 2 ein Schweißband aus Chemiefasern bezeichnet ist.
Fig. Ib zeigt die gleichen Teile nach der Heißluftverschweißung, wobei die Schweißstelle "S" eine deutliche Strukturverdichtung zeigt.
Fig. 2a stellt den Schnitt durch eine Stoßverschweißung dar. Das Schweißband 2 ist in die Kanten der verschweißten Matten eingedrückt worden, wobei eine Strukturverdichtung nur im Innern der Kanten feststellbar ist. Die Oberfläche und die der Schweißstelle benachbarten Zonen sind unverändert geblieben.
Fig. 2b zeigt die Stoßverschweißung von oben, die keine optisch wahrnehmbare Veränderung zeigt.
721707S23.1U2

Claims (3)

Schutzansprüche
1. Hochfest verschweißte thermoplastische Chemiefasermatten (1+3) dadurch gekennzeichnet, daß als zusätzliches Schweißmaterial ein Streifen (?.) einer durch ein Trägergevebe genadelten Chemiefasermatte aus dem gleichen Material verwendet worden ist.
2. Hochfest verschweißte thermoplastische Chemiefasermatten nach Anspruch 1 dadurch gekennzeichnet, daß bei Überlappungsverschweißungen die Außenkanten der zu verschweißenden Hatten (1-3) in etwa der halben Breite des Schweißbandes verdichtet sind.
3. Hochfest verschleißte thermoplastische Chemiefasermatten nach Anspr ;ch 1 dadurch gekennzeichnet, daß bei Stoßverschweißungen das Schweißband (2) unter der Stoßstelle angeschweißt worden ist.
k. Hochfest verschweißte thermoplastische Chemiefasermatten nach Anspruch 1 und 2 dadurch gekennzeichnet, daß die Fasern im Bereich der Schweißstellen durch einen Heißluftstrahl zum Schmelzen gebracht und die zu verschmelzenden Teile gleichzeitig durch den Druck kalter Walzen zusammengepreßt sind.
721707523.11.72
DE7217075U Chemiefaser-Doppel-Matte Expired DE7217075U (de)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913723A1 (de) * 1989-04-26 1990-10-31 Wegener Gmbh Verfahren zum verschweissen der stirnflaechen von kunststoffteilen sowie vorrichtung zur durchfuehrung dieses verfahrens
DE4024252A1 (de) * 1990-07-31 1992-02-06 Silver Plastics Gmbh & Co Kg Verfahren und anlage zum kontinuierlichen verbinden von zumindest zwei vliesbahnen
DE4030989A1 (de) * 1990-10-01 1992-04-09 Airbus Gmbh Verfahren und vorrichtung zum verstaerken von bauteilen aus lagen von faserverstaerktem thermoplastischem kunststoff
DE102008063651A1 (de) * 2008-12-18 2010-07-01 Institut Für Verbundwerkstoffe Gmbh Verfahren zur Verbindung von zwei jeweils aus einem Faser-Kunststoff-Verbund bestehenden Werkstücken

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913723A1 (de) * 1989-04-26 1990-10-31 Wegener Gmbh Verfahren zum verschweissen der stirnflaechen von kunststoffteilen sowie vorrichtung zur durchfuehrung dieses verfahrens
DE4024252A1 (de) * 1990-07-31 1992-02-06 Silver Plastics Gmbh & Co Kg Verfahren und anlage zum kontinuierlichen verbinden von zumindest zwei vliesbahnen
DE4030989A1 (de) * 1990-10-01 1992-04-09 Airbus Gmbh Verfahren und vorrichtung zum verstaerken von bauteilen aus lagen von faserverstaerktem thermoplastischem kunststoff
DE102008063651A1 (de) * 2008-12-18 2010-07-01 Institut Für Verbundwerkstoffe Gmbh Verfahren zur Verbindung von zwei jeweils aus einem Faser-Kunststoff-Verbund bestehenden Werkstücken

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