EP0129027A2 - Method of perforating foils and sheetings of plastic or rubber - Google Patents

Method of perforating foils and sheetings of plastic or rubber Download PDF

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Publication number
EP0129027A2
EP0129027A2 EP84104779A EP84104779A EP0129027A2 EP 0129027 A2 EP0129027 A2 EP 0129027A2 EP 84104779 A EP84104779 A EP 84104779A EP 84104779 A EP84104779 A EP 84104779A EP 0129027 A2 EP0129027 A2 EP 0129027A2
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EP
European Patent Office
Prior art keywords
plastic
film
fine
poring
material web
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Withdrawn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
EP84104779A
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German (de)
French (fr)
Other versions
EP0129027A3 (en
Inventor
Gerhard Dr.-Ing. Feld
Klaus-Peter Dipl.-Phys. Schmidt-Kufeke
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.)
Schmidt Kufeke K P
Original Assignee
Schmidt Kufeke K P
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 Schmidt Kufeke K P filed Critical Schmidt Kufeke K P
Publication of EP0129027A2 publication Critical patent/EP0129027A2/en
Publication of EP0129027A3 publication Critical patent/EP0129027A3/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • B26F1/28—Perforating by non-mechanical means, e.g. by fluid jet by electrical discharges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/084—Means for treating work or cutting member to facilitate cutting specially adapted for cutting articles composed of at least two different materials, e.g. using cutters of different shapes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • Plastic films and plastic or rubber coated textiles such as. B. synthetic leather or weather clothing have the advantage of being absolutely waterproof. However, they have the great disadvantage that they have little or no breathability.
  • such materials require a certain level of water vapor permeability, while at the same time a high level of waterproofness is required.
  • the water vapor permeability essentially depends on the number of perforations per unit area and their absolute size. The watertightness is determined by the size of the holes.
  • the object of the invention is therefore to provide a method by means of which materials that are electrically non-porous or difficult to portray can be made breathable with high water tightness.
  • FIG. 1 shows, on an enlarged scale, a section of a material web which is based on a textile material 1 onto which an electrically porous plastic film 2 is laminated.
  • any other breathable carrier such as. B. a fleece or paper.
  • a carrier can also be dispensed with.
  • the foil-clad textile material 1 shown in FIG. 1 has already been mechanically perforated in a first process step by a well-known needling process.
  • the plastic film 2 is provided with a large number of closely adjacent fine punctures 3.
  • the textile material 1 is also pierced in the process, but the punctures 3a are lost in the loose textile fabric.
  • the punctures 3 have a diameter even when using the finest needles, which ensures good breathability but does not guarantee watertightness.
  • the surface of the plastic film 2 is coated with a thin closed support 4 made of an electrically porous material, preferably a plastic. This is sprayed on in liquid or paste-like form in a known manner or applied to the film surface by an applicator.
  • the entire material web is subjected to a fine poring process in a third process step.
  • This can e.g. B. by an arrangement according to DE-OS 28 30 326, in which the support or layer 4 is provided in the area of the punctures 3 with the finest pores 5.
  • one or more pores 5 can be introduced per puncture 3.
  • FIG. 5 shows section A of FIG. 2 on an enlarged scale.
  • the illustration clearly shows the needled plastic film 2 with the punctures 3. These are covered by layer 4 to the outside.
  • the desired breathability with simultaneous high water tightness is provided via the finest pores 5 introduced into the layer 4.

Abstract

Feinstporieren von Kunststoffolien und anderen Materialien mittels Hochspannungsimpulsen findet ihre Grenze, wenn die materialspezifische Dielektrizitätskonstante oder die Dicke des Materials zu hoch ist. Das erfindungsgemäße Verfahren sieht daher vor, die elektrisch nicht porierbaren Materialen (Kunststoffolie 2) in einem Nadelungsprozeß mit einer Vielzahl von Durchstichen (3) zu versehen, anschließend die Oberfläche der Folie (2) durch eine dünne, elektrisch porierbare Auflage oder Schicht (4) wieder zu verschließen, um dann diese Schicht (4) in einem Feintporierprozeß mittels Hochspannungsimpulsen im Bereich der Durchstiche (3) mit wasserdampfdurchlässigen, aber wasserdichten feinsten Poren (5) zu versehen.The fine poring of plastic films and other materials using high-voltage pulses finds its limit when the material-specific dielectric constant or the thickness of the material is too high. The method according to the invention therefore provides for the electrically non-porable materials (plastic film 2) to be provided with a plurality of punctures (3) in a needling process, and then the surface of the film (2) by means of a thin, electrically porous support or layer (4). to close again in order to then provide this layer (4) in a fine poring process by means of high-voltage pulses in the area of the punctures (3) with water vapor-permeable but watertight fine pores (5).

Description

Verfahren zum Feinstporieren von Kunststoffolien und/oder kunststoff-oder gummibeschichteten MaterialbahnenProcess for fine poring of plastic films and / or plastic or rubber-coated material webs

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff von Anspruch 1.The invention relates to a method according to the preamble of claim 1.

Kunststoffolien und kunststoff- oder gummibeschichtete Textilien, wie z. B. Kunstleder oder Wetterkleidung, haben den Vorteil absolut wasserdicht zu sein. Ihnen haftet allerdings der große Nachteil an, daß sie keine oder nur eine sehr geringe Atmungsaktivität haben. Für verschiedenste Anwendungszwecke, z. B. im Bekleidungssektor, wird von derartigen Materialien ein bestimmtes Maß an Wasserdampfdurchlässigkeit verlangt, wobei gleichzeitig ein hohes Maß an Wasserdichtheit gefordert wird. Die Wasserdampfdurchlässigkeit ist im wesentlichen von der Anzahl der Perforationen pro Flächeneinheit und ihrer absoluten Größe abhängig. Die Wasserdichtheit wird dagegen durch die Größe der Löcher bestimmt.Plastic films and plastic or rubber coated textiles, such as. B. synthetic leather or weather clothing have the advantage of being absolutely waterproof. However, they have the great disadvantage that they have little or no breathability. For a wide variety of applications, e.g. B. in the clothing sector, such materials require a certain level of water vapor permeability, while at the same time a high level of waterproofness is required. The water vapor permeability essentially depends on the number of perforations per unit area and their absolute size. The watertightness is determined by the size of the holes.

Durch die DE-OS 28 30 326 ist eine Anordnung zum Feinstporieren folienartiger Materialbahnen mittels Hochspannungsimpulsen bekannt, mit der eine den Normenvorschriften entsprechende gleichmäßige und dichte Perforierung bei kleinstem Perforationslochdurchmesser erreicht wird, die einerseits eine ausreichende Atmungsaktivität des porierten Materials sicherstellt, aber gleichzeitig eine hohe Wasserdichtheit gewährleistet. Es gibt jedoch eine ganz Reihe von zu Folien verarbeiteten oder als Schichtstoffe verwendeten Materialien wie z. B. Polyäthylen und Polypropylen, aber auch natürlicher und synthetischer Kautschuk, die eine derart hohe Dielektrizitätskonstante haben, daß ein Feinstporieren auf elektrischem Wege mittels Hochspannungsimpulsen nicht möglich ist. Zwar können in einzelnen Fällen durch ein Erhöhen der angelegten Spannung Durchschläge erzielt werden, doch sind die dabei entstehenden Löcher in der Regel so groß, daß die verlangte Wasserdichtheit nicht mehr gegeben ist. Ab einer gewissen Folien- oder Schichtdicke der an sich elektrisch porierbaren Materialien tritt das gleiche Problem auf.From DE-OS 28 30 326 an arrangement for the fine poring of sheet-like material webs by means of high-voltage pulses is known, with which a uniform and dense perforation is achieved with the smallest perforation hole diameter, which on the one hand ensures adequate breathability of the pored material, but at the same time ensures a high level of water resistance guaranteed. However, there is a whole range of materials processed into foils or used as laminates, such as. B. polyethylene and polypropylene, but also natural and synthetic rubber, which have such a high dielectric constant that fine poring is not possible by electrical means using high-voltage pulses. Although breakdowns can be achieved in individual cases by increasing the applied voltage, the holes which are formed are generally so large that the required watertightness is no longer ensured. The same problem arises from a certain film or layer thickness of the materials which are electrically porous per se.

Die Aufgabe der Erfindung besteht daher darin, ein Verfahren anzugeben, durch das elektrisch nicht oder nur schwer porierbare Materialien bei hoher Wasserdichtheit atmungsaktiv gemacht werden können.The object of the invention is therefore to provide a method by means of which materials that are electrically non-porous or difficult to portray can be made breathable with high water tightness.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Die Unteransprüche zeigen vorteilhafte Ausgestaltungen des Erfindungsgegenstandes auf.This object is achieved by the features specified in the characterizing part of claim 1. The subclaims show advantageous configurations of the subject matter of the invention.

Die durch die Erfindung erzielten Vorteile bestehen insbesondere darin, daß durch die mechanische Porierung des Folien- oder beschichteten Materials und der anschließenden dünnen Beschichtung mit einem elektrisch porierbaren Material, eine einfache Methode gegeben ist, Materialien feinstzuporieren, die sich dafür an sich nicht eignen.The advantages achieved by the invention consist in particular in that the mechanical poration of the film or coated material and the subsequent thin coating with an electrically porous material provide a simple method of finely poring materials which are not suitable for this purpose.

Anhand eines Beispiels wird das Verfahren gemäß der Erfindung in Verbindung mit den Zeichnungen nachfolgend näher erläutert. Es zeigt:

  • Fig. 1 die vergrößerte schematische Darstellung eines Ausschnitts eines textilen Trägermaterials mit einer aufkaschierten Kunststofffolie im Längsschnitt und im genadelten Zustand.
  • Fig. 2 den Gegenstand der Fig. 1, bei der die Folienoberfläche mit einer dünnen Auflage aus einem elektrisch porierbaren Material beschichtet ist.
  • Fig. 3 den Ausschnitt A der Fig. 2 in vergrößertem Maßstab.
The method according to the invention is explained in more detail below with reference to the drawings. It shows:
  • Fig. 1 shows the enlarged schematic representation of a section of a textile carrier material with a laminated plastic film in longitudinal section and in the needled state.
  • Fig. 2 shows the subject of Fig. 1, in which the film surface is coated with a thin layer of an electrically porous material.
  • Fig. 3 shows the detail A of FIG. 2 on an enlarged scale.

Die schematische Darstellung der Fig. 1 zeigt in vergrößertem Maßstab einen Ausschnitt aus einer Materialbahn, die als Basis ein Textilmaterial 1 hat, auf das eine elektrisch porierbare Kunststoffolie 2 aufkaschiert ist. Je nach Verwendungszweck kann an die Stelle des Textilmaterials 1 ein beliebiger anderer atmungsaktiver Träger, wie z. B. ein Vlies oder Papier, treten. Auf einen Träger kann auch verzichtet werden.The schematic representation of FIG. 1 shows, on an enlarged scale, a section of a material web which is based on a textile material 1 onto which an electrically porous plastic film 2 is laminated. Depending on the intended use, any other breathable carrier, such as. B. a fleece or paper. A carrier can also be dispensed with.

Das in Fig. 1 dargestellte folienkaschierte Textilmaterial 1 ist bereits in einem ersten Verfahrensschritt durch einen hinreichend bekannten Nadelungsprozeß auf mechanischem Wege fein perforiert worden. Durch das Nadeln ist die Kunststoffolie 2 mit einer Vielzahl eng benachbarter feiner Durchstiche 3 versehen. Das Textilmaterial 1 wird in dem Prozeß zwar auch durchstochen, doch verlieren sich die Durchstiche 3a in dem lockeren Textilgewebe. Die Durchstiche 3 haben auch bei Verwendung feinster Nadeln einen Durchmesser, der zwar eine gute Atmungsaktivität sicherstellt, aber keine Wasserdichtheit gewährleistet.The foil-clad textile material 1 shown in FIG. 1 has already been mechanically perforated in a first process step by a well-known needling process. By needling, the plastic film 2 is provided with a large number of closely adjacent fine punctures 3. The textile material 1 is also pierced in the process, but the punctures 3a are lost in the loose textile fabric. The punctures 3 have a diameter even when using the finest needles, which ensures good breathability but does not guarantee watertightness.

In einem zweiten Verfahrensschritt wird die Oberfläche der Kunststofffolie 2 mit einer dünnen geschlossenen Auflage 4 aus einem elektrisch porierbaren Material, vorzugsweise einem Kunststoff, beschichtet. Dieser wird in flüssiger oder pastenartiger Form in bekannter Weise aufgespritzt bzw. durch ein Auftragwerk auf die Folienoberfläche aufgebracht.In a second process step, the surface of the plastic film 2 is coated with a thin closed support 4 made of an electrically porous material, preferably a plastic. This is sprayed on in liquid or paste-like form in a known manner or applied to the film surface by an applicator.

Nachdem die so aufgetragene Schicht 4 abgebunden und sich verfestigt hat, wird die gesamte Materialbahn in einem dritten Verfahrensschritt einem Feinstporierprozeß unterzogen. Dieser kann z. B. durch eine Anordnung gemäß der DE-OS 28 30 326 erfolgen, in der die Auflage oder Schicht 4 im Bereich der Durchstiche 3 mit feinsten Poren 5 versehen wird. Je nach dem Durchmesser der Durchstiche 3 lassen sich ein oder mehrere Poren 5 pro Durchstich 3 einbringen.After the layer 4 applied in this way has set and solidified, the entire material web is subjected to a fine poring process in a third process step. This can e.g. B. by an arrangement according to DE-OS 28 30 326, in which the support or layer 4 is provided in the area of the punctures 3 with the finest pores 5. Depending on the diameter of the punctures 3, one or more pores 5 can be introduced per puncture 3.

Fig. 5 zeigt den Ausschnitt A der Fig. 2 in vergrößertem Maßstab. Die Darstellung läßt gut die genadelte Kunststoffolie 2 mit den Durchstichen 3 erkennen. Diese sind durch die Schicht 4 nach außen abgedeckt. Ober die in die Schicht 4 eingebrachten feinsten Poren 5 ist die gewünschte Atmungsaktivität bei gleichzeitiger hoher Wasserdichtheit gegeben.FIG. 5 shows section A of FIG. 2 on an enlarged scale. The illustration clearly shows the needled plastic film 2 with the punctures 3. These are covered by layer 4 to the outside. The desired breathability with simultaneous high water tightness is provided via the finest pores 5 introduced into the layer 4.

Claims (3)

1. Verfahren zum Feinstporieren von Kunststoffolien und/oder kunststoff-oder gummibeschichteten Materialbahnen, bei denen die Dicke der Folie bzw. der Beschichtung und/oder deren Dielektrizitätskonstante für ein Feinstporieren mittels Hochspannungsimpulsen zu hoch sind, dadurch gekennzeichnet, daß die Kunststoffolie oder die kunststoff- oder gummibeschichtete Materialbahn in einem ersten Arbeitsgang mechanisch poriert wird, daß die so behandelte Folie oder Materialbahn anschließend mit einer dünnen Schicht (4) aus einem elektrisch porierbaren homogenen Material, vorzugsweise Kunststoff, versehen wird und daß die in dieser Weise ausgerüstete Folie oder Materialbahn einem mittels Hochspannungsimpulsen arbeitenden Feinstporierprozeß unterzogen wird.1. A method for fine poring of plastic films and / or plastic or rubber-coated material webs in which the thickness of the film or the coating and / or its dielectric constant are too high for fine poring by means of high-voltage pulses, characterized in that the plastic film or the plastic or rubber-coated material web is mechanically pored in a first operation, that the film or material web treated in this way is subsequently provided with a thin layer (4) of an electrically porous homogeneous material, preferably plastic, and that the film or material web so equipped is mixed with one High-voltage pulses working fine poring process is subjected. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das mechanische Porieren der Folie oder Materialbahn durch Nadeln erfolgt.2. The method according to claim 1, characterized in that the mechanical poration of the film or material web is carried out by needles. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die elektrisch porierbare Schicht (4) in flüssiger oder pastenartiger Form auf die Folie oder Materialbahn durch Spritzen bzw. mittels eines Auftragswerkes aufgebracht wird.3. The method according to claim 1, characterized in that the electrically porous layer (4) is applied in liquid or pasty form to the film or material web by spraying or by means of an applicator.
EP84104779A 1983-05-03 1984-04-27 Method of perforating foils and sheetings of plastic or rubber Withdrawn EP0129027A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3316118 1983-05-03
DE3316118A DE3316118C2 (en) 1983-05-03 1983-05-03 Method for producing a water vapor permeable material web

Publications (2)

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EP0129027A2 true EP0129027A2 (en) 1984-12-27
EP0129027A3 EP0129027A3 (en) 1987-07-01

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EP84104779A Withdrawn EP0129027A3 (en) 1983-05-03 1984-04-27 Method of perforating foils and sheetings of plastic or rubber

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US (1) US4534994A (en)
EP (1) EP0129027A3 (en)
JP (1) JPS6028587A (en)
DE (1) DE3316118C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188105A1 (en) * 1985-01-14 1986-07-23 General Motors Corporation Microwave method of perforating a polymer film
EP1632345A3 (en) * 2004-09-06 2008-05-21 Silu Verwaltung AG Multilayer film with adjustable water vapour permeability

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777338A (en) * 1987-04-08 1988-10-11 Cross James D Perforation of synthetic plastic films
JPH0783999B2 (en) * 1992-04-07 1995-09-13 栄電子工業株式会社 Small diameter hole drilling method for substrate material
DE4309832C2 (en) * 1992-07-02 1997-09-04 Empac Verpackungs Gmbh Process for the production of an electrically conductive wall from a fabric and foil material
US5356497A (en) * 1993-05-05 1994-10-18 Lee Chi S Method for forming a sheet material permeable to gas and not permeable to water
US6188043B1 (en) 1998-11-24 2001-02-13 Cryovac, Inc. Method for making permeable film
GB201007437D0 (en) * 2010-05-01 2010-06-16 Fazal Fatima Shareware/iheart part (iheart project)

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US2976539A (en) * 1953-12-08 1961-03-28 Us Rubber Co Cold weather clothing
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CH510779A (en) * 1969-09-11 1971-07-31 Gustav Ernstmeier Kg Process for the production of water vapor and air permeable artificial leather and then manufactured artificial leather
GB1248548A (en) * 1969-05-19 1971-10-06 American Cyanamid Co Integral laminated composite structure
DE2740613A1 (en) * 1977-09-09 1979-03-22 Fraunhofer Ges Forschung Coated fleece material perforating arrangement - uses spark erosion needles to improve its ability to let through water vapour
AU503534B1 (en) * 1978-04-24 1979-09-06 Toyota Jidosha Kogyo Kabushiki Kaisha Auto ceiling panel and its manufacture

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Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US2976539A (en) * 1953-12-08 1961-03-28 Us Rubber Co Cold weather clothing
DE1143477B (en) * 1956-11-05 1963-02-14 Du Pont Water vapor permeable, abrasion-resistant, flexible synthetic leather
GB1248548A (en) * 1969-05-19 1971-10-06 American Cyanamid Co Integral laminated composite structure
CH510779A (en) * 1969-09-11 1971-07-31 Gustav Ernstmeier Kg Process for the production of water vapor and air permeable artificial leather and then manufactured artificial leather
DE2740613A1 (en) * 1977-09-09 1979-03-22 Fraunhofer Ges Forschung Coated fleece material perforating arrangement - uses spark erosion needles to improve its ability to let through water vapour
AU503534B1 (en) * 1978-04-24 1979-09-06 Toyota Jidosha Kogyo Kabushiki Kaisha Auto ceiling panel and its manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188105A1 (en) * 1985-01-14 1986-07-23 General Motors Corporation Microwave method of perforating a polymer film
EP1632345A3 (en) * 2004-09-06 2008-05-21 Silu Verwaltung AG Multilayer film with adjustable water vapour permeability

Also Published As

Publication number Publication date
DE3316118A1 (en) 1984-11-08
EP0129027A3 (en) 1987-07-01
US4534994A (en) 1985-08-13
DE3316118C2 (en) 1986-10-16
JPS6028587A (en) 1985-02-13

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