WO2002100927A2 - Method for stabilizing permeation restricting layers on plastic parts - Google Patents
Method for stabilizing permeation restricting layers on plastic parts Download PDFInfo
- Publication number
- WO2002100927A2 WO2002100927A2 PCT/EP2002/006081 EP0206081W WO02100927A2 WO 2002100927 A2 WO2002100927 A2 WO 2002100927A2 EP 0206081 W EP0206081 W EP 0206081W WO 02100927 A2 WO02100927 A2 WO 02100927A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- permeation
- layers
- plastic parts
- inhibiting
- stabilizing
- Prior art date
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Classifications
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
- C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
-
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
Definitions
- the present invention relates to a method for stabilizing permeation-inhibiting layers on plastic parts, in particular layers which consist of layers of metal oxides or carbon applied in a vacuum by a PVD or CVD method.
- Permeation-inhibiting layers made from elementary amorphous carbon and oxides of silicon or aluminum have proven particularly useful. The layers are often only 10 to 50 nm thick, but can significantly reduce the permeability of the plastics coated with them to gases such as oxygen or carbon dioxide and to water vapor.
- the thin permeation-inhibiting layer In the case of three-dimensional plastic structures, such as those obtained by deep drawing, injection molding or injection blow molding, the thin permeation-inhibiting layer must be applied to the already formed structures. The subsequent application of a protective layer cannot be done by simple lamination, as is the case with foils, and thus presents considerable difficulties.
- the object of the invention is to stabilize the permeation-inhibiting layers on plastic parts, particularly in the case of such three-dimensional structures, but also in the case of films.
- Suitable adhesive layers are, in particular, commercially available solutions or dispersions of rubber, polyacrylates, polyvinyl acetates and partially saponified polyvinyl acetates, which may also contain plasticizers, such as glycol.
- the selection of the materials that can be used as adhesive layers depends primarily on the respective requirements, such as solubility in aqueous or organic solvents, stickiness, level of softening temperature, economy and ecology.
- the application is carried out in a manner known per se for coatings, such as spraying, brushing, rolling or, in the case of three-dimensional parts, immersion and subsequent draining and subsequent drying.
- the method according to the invention can of course also be applied to films. It may then be possible to dispense with the application of a protective cover layer. Of course, an additional cover layer can then also be applied when using the method according to the invention. In any case, minor damage to the permeation-inhibiting layers leads to little deterioration of the barrier properties. Shafts, since whole clods do not peel off or are torn out as before.
- the adhesive layer can also be water-soluble in order to be able to remove the adhesive layer by simply washing with water later when recycling the plastic articles.
- the softening temperature of the adhesive layer should be selected so that it can soften the surface when the permeation-inhibiting layer is deposited and the barrier layer therefore adheres well to it. When it cools down, the surface of the adhesive layer can then solidify again.
- the elastic adhesive layer can be kept very thin, it will generally not interfere with the recycling of the plastics. In the case of water solubility, it can even be detached and separated by water together with the permeation-inhibiting layer.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a method for stabilizing permeation restricting layers on plastic parts. Said method is characterized in that the plastic parts are coated with a thin elastic adhesive layer before being coated with the permeation restricting material.
Description
Verfahren zur Stabilisierung von permeationshemmenden Schichten auf Kunststoff teilen Process for stabilizing permeation-inhibiting layers on plastic parts
Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Stabilisierung von permeationshemmenden Schichten auf Kunststoffteilen, insbesondere von Schichten, die aus im Vakuum nach einem PVD- oder CVD- Verfahren aufgetragenen Schichten aus Metalloxiden oder Kohlenstoff bestehen.The present invention relates to a method for stabilizing permeation-inhibiting layers on plastic parts, in particular layers which consist of layers of metal oxides or carbon applied in a vacuum by a PVD or CVD method.
Diese Beschichtungen führen zu einer Verminderung der Permeabilität von Kunststoffen, wie sie beispielsweise für die Verpackung empfindlicher Güter benötigt werden. Besonders bewährt haben sich permeationshemmende Schichten aus elementarem amorphen Kohlenstoff sowie Oxiden des Siliziums oder Aluminiums. Die Schichten sind oft nur 10 bis 50 nm dick, können aber die Permeabilität der damit beschichteten Kunststoffe gegenüber Gasen wie Sauerstoff oder Kohlendioxid sowie gegenüber Wasserdampf erheblich vermindern.These coatings lead to a reduction in the permeability of plastics, as is required, for example, for packaging sensitive goods. Permeation-inhibiting layers made from elementary amorphous carbon and oxides of silicon or aluminum have proven particularly useful. The layers are often only 10 to 50 nm thick, but can significantly reduce the permeability of the plastics coated with them to gases such as oxygen or carbon dioxide and to water vapor.
Die Verminderung der Permeabilität wird jedoch bei derartigen Verpackungen oft erheblich vermindert durch mechanische Beanspruchungen beim Befüllen, Verschließen, Lagern und Transportieren etc.. Dies ist auf mechanische Beschädigung der dünnen Barriereschichten zurückzuführen.However, the reduction in permeability in such packaging is often considerably reduced by mechanical stresses during filling, closing, storage and transport, etc. This is due to mechanical damage to the thin barrier layers.
Ein weiterer Grund für die Beschädigung der so dünnen permeationshemmenden Schichten ist auch, dass diese Schichten nicht ausreichend elastisch oder dehnbar sind und außerdem ihr thermischer Ausdehnungskoeffizient durchaus verschieden ist, von dem des als Substrat dienenden Kunststoffs. So können auch Temperaturänderungen zu Brüchen oder zu erheblichen Ablösungen der permeationshemmenden Schichten von ihrer Unterlage führen. Kunststofffolien mit permeationshemmenden Silizium- und Aluminium-Oxid-Schichten werden daher häufig mit einer weiteren Kunststoffschicht, beispielsweise aus Polyethylen abgedeckt, um die empfindliche permeationshemmende Schicht zu schützen. Derartige Deckschichten können darüber hinaus weitere Funktionen erfüllen, wie Siegelfähigkeit, zusätzliche Farben, erhöhter Glanz, etc.
Bei dreidimensionalen Kunststoffgebilden, wie sie zum Beispiel durch Tiefziehen, Spritzgießen oder Spritzblasen gewonnen werden, muss die Aufbringung der dünnen permeationshemmenden Schicht auf den bereits ausgeformten Gebilden erfolgen. Das nachträgliche Aufbringen einer Schutzschicht kann nicht wie bei Folien durch einfache Laminierung erfolgen und bereitet somit erhebliche Schwierigkeiten.Another reason for the damage to the so thin permeation-inhibiting layers is that these layers are not sufficiently elastic or stretchable and, moreover, their coefficient of thermal expansion is quite different from that of the plastic serving as the substrate. Changes in temperature can also lead to breaks or considerable detachment of the permeation-inhibiting layers from their base. Plastic films with permeation-inhibiting silicon and aluminum oxide layers are therefore often covered with a further plastic layer, for example made of polyethylene, in order to protect the sensitive permeation-inhibiting layer. Such cover layers can also perform other functions, such as sealability, additional colors, increased gloss, etc. In the case of three-dimensional plastic structures, such as those obtained by deep drawing, injection molding or injection blow molding, the thin permeation-inhibiting layer must be applied to the already formed structures. The subsequent application of a protective layer cannot be done by simple lamination, as is the case with foils, and thus presents considerable difficulties.
Die Erfindung hat sich die Aufgabe gestellt, insbesondere bei derartigen dreidimensionalen Gebilden, aber auch bei Folien die permeationshemmenden Schichten auf Kunststoffteilen zu stabilisieren.The object of the invention is to stabilize the permeation-inhibiting layers on plastic parts, particularly in the case of such three-dimensional structures, but also in the case of films.
Diese Aufgabe wird dadurch gelöst, dass die Kunststoffteile vor der Beschichtung mit dem permeationshemmenden Material vorbeschichtet werden mit einer dünnen elastischen Klebeschicht. Als Klebeschicht geeignet sind insbesondere handelsübliche Lösungen oder Dispersionen von Kautschuk, Polyacrylaten, Poly- vinylacetaten und teilweise verseiften Polyvinylacetaten, die ggf. noch Weichma- eher enthalten, wie zum Beispiel Glykol.This object is achieved in that the plastic parts are precoated with a thin elastic adhesive layer before coating with the permeation-inhibiting material. Suitable adhesive layers are, in particular, commercially available solutions or dispersions of rubber, polyacrylates, polyvinyl acetates and partially saponified polyvinyl acetates, which may also contain plasticizers, such as glycol.
Die Auswahl der als Klebeschichten in Frage kommenden Materialien richtet sich vor allem nach den jeweiligen Erfordernissen, wie Löslichkeit in wässrigen oder organischen Lösungsmitteln, Klebrigkeit, Höhe der Erweichungstemperatur, Ökonomie und Ökologie. Der Auftrag erfolgt in an sich bekannter Weise für Be- Schichtungen, wie Aufsprühen, Aufpinseln, Aufwalzen oder bei dreidimensionalen Teilen Eintauchen und anschließendes Abtropfenlassen sowie anschließender Trocknung.The selection of the materials that can be used as adhesive layers depends primarily on the respective requirements, such as solubility in aqueous or organic solvents, stickiness, level of softening temperature, economy and ecology. The application is carried out in a manner known per se for coatings, such as spraying, brushing, rolling or, in the case of three-dimensional parts, immersion and subsequent draining and subsequent drying.
Das erfindungsgemäße Verfahren kann selbstverständlich auch bei Folien angewendet werden. Es kann dann ggf. auf das Aufbringen einer schützenden Deck- schicht verzichtet werden. Selbstverständlich kann aber auch bei Anwendung des erfindungsgemäßen Verfahrens anschließend eine zusätzliche Deckschicht aufgetragen werden. Auf alle Fälle führen kleinere Beschädigungen der permeationshemmenden Schichten nur zu geringer Verschlechterung der Barriereeigen-
Schäften, da nicht wie bisher ganze Schollen abblättern oder herausgerissen werden.The method according to the invention can of course also be applied to films. It may then be possible to dispense with the application of a protective cover layer. Of course, an additional cover layer can then also be applied when using the method according to the invention. In any case, minor damage to the permeation-inhibiting layers leads to little deterioration of the barrier properties. Shafts, since whole clods do not peel off or are torn out as before.
Gewünschtenfalls kann auch die Kleberschicht wasserlöslich sein, um später beim Recyceln der Kunststoffartikel die Kleberschicht durch einfaches Waschen mit Wasser wieder entfernen zu können.If desired, the adhesive layer can also be water-soluble in order to be able to remove the adhesive layer by simply washing with water later when recycling the plastic articles.
Schließlich kann nach dem Auftragen der Kleberschicht aus Lösungen oder wässrigen Dispersionen auf eine scharfe Trocknung verzichtet werden, da Reste an Lösungsmitteln und restliches Wasser beim Auftragen der permeationshemmenden Schichten im Vakuum entfernt werden.Finally, after the application of the adhesive layer from solutions or aqueous dispersions, there is no need for a sharp drying operation, since residues of solvents and residual water are removed in a vacuum when the permeation-inhibiting layers are applied.
" Die Erweichungstemperatur der Klebeschicht sollte so gewählt werden, dass sie beim Abscheiden der permeationshemmenden Schicht oberflächlich erweichen kann und somit die Barriereschicht darauf gute Haftung findet. Beim anschließendem Auskühlen kann sich dann die Oberfläche der Kleberschicht wieder verfestigen. " The softening temperature of the adhesive layer should be selected so that it can soften the surface when the permeation-inhibiting layer is deposited and the barrier layer therefore adheres well to it. When it cools down, the surface of the adhesive layer can then solidify again.
Da die elastische Klebeschicht sehr dünn gehalten werden kann, wird sie im Allgemeinen beim Recyceln der Kunststoffe nicht stören. Im Falle der Wasserlös- ligkeit lässt sie sich sogar zusammen mit der permeationshemmenden Schicht durch Wasser ablösen und abtrennen.
Since the elastic adhesive layer can be kept very thin, it will generally not interfere with the recycling of the plastics. In the case of water solubility, it can even be detached and separated by water together with the permeation-inhibiting layer.
Claims
1. Verfahren zur Stabilisierung von permeationshemmenden Schichten auf Kunststoffteilen, dadurch gekennzeichnet, dass die Kunststoffteile vor der Beschichtung mit dem permeationshemmendem Material vorbeschichtet werden mit einer dünnen, elastischen Klebeschicht.1. A method for stabilizing permeation-inhibiting layers on plastic parts, characterized in that the plastic parts are precoated with a thin, elastic adhesive layer before coating with the permeation-inhibiting material.
2. Verfahren gemäss Anspruch 1, dadurch gekennzeichnet, dass die permeationshemmenden Schichten bestehen aus im Vakuum nach einem PVD- oder CVD- Verfahren aufgetragenen Schichten aus Metalloxiden oder Kohlenstoff.2. The method according to claim 1, characterized in that the permeation-inhibiting layers consist of layers of metal oxides or carbon applied in a vacuum by a PVD or CVD method.
3. Verfahren gemäss Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Vorbeschichtung erfolgt mit handelsüblichen Lösungen oder Dispersionen von3. The method according to claim 1 or 2, characterized in that the precoating is carried out with commercially available solutions or dispersions of
Kautschuk, Polyacrylaten, Polyvinylacetaten, teilverseifte Polyvinylacetaten, die ggf. Weichmacherzusätze enthalten.Rubber, polyacrylates, polyvinyl acetates, partially saponified polyvinyl acetates, which may contain plasticizer additives.
4. Verfahren gemäss einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass auf das permeationshemmende Material zusätzlich eine Deckschicht auf- getragen wird. 4. The method according to any one of claims 1 to 3, characterized in that a cover layer is additionally applied to the permeation-inhibiting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2002316959A AU2002316959A1 (en) | 2001-06-09 | 2002-06-04 | Method for stabilizing permeation restricting layers on plastic parts |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10128137 | 2001-06-09 | ||
| DE10128137.4 | 2001-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2002100927A2 true WO2002100927A2 (en) | 2002-12-19 |
| WO2002100927A3 WO2002100927A3 (en) | 2003-11-20 |
Family
ID=7687821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2002/006081 WO2002100927A2 (en) | 2001-06-09 | 2002-06-04 | Method for stabilizing permeation restricting layers on plastic parts |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2002316959A1 (en) |
| WO (1) | WO2002100927A2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0266225A1 (en) * | 1986-10-31 | 1988-05-04 | Hashimoto Forming Industry Co Ltd | Method of producing plastic-moulded articles with hard coated surface layers |
| EP0992610A2 (en) * | 1998-09-30 | 2000-04-12 | Becton Dickinson and Company | Barrier coating on plastic substrates and process for its deposition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04239537A (en) * | 1991-01-23 | 1992-08-27 | Nissan Motor Co Ltd | Transparent resin substrate improved in scratch resistance |
| JP4108824B2 (en) * | 1998-04-14 | 2008-06-25 | 大日本印刷株式会社 | Transparent barrier film |
-
2002
- 2002-06-04 AU AU2002316959A patent/AU2002316959A1/en not_active Abandoned
- 2002-06-04 WO PCT/EP2002/006081 patent/WO2002100927A2/en not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0266225A1 (en) * | 1986-10-31 | 1988-05-04 | Hashimoto Forming Industry Co Ltd | Method of producing plastic-moulded articles with hard coated surface layers |
| EP0992610A2 (en) * | 1998-09-30 | 2000-04-12 | Becton Dickinson and Company | Barrier coating on plastic substrates and process for its deposition |
Non-Patent Citations (2)
| Title |
|---|
| DATABASE CHEMABS [Online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, USA; Database accession no. 131:311421, XP002233247 & JP 11 291385 A (DAINIPPON PRINTING CO., LTD) 26. Oktober 1999 (1999-10-26) * |
| DATABASE WPI Week 9241 Derwent Publications Ltd., London, GB; AN 1992-335714 XP002233248 & JP 04 239537 A (NISSAN MOTOR CO LTD), 27. August 1992 (1992-08-27) * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002100927A3 (en) | 2003-11-20 |
| AU2002316959A1 (en) | 2002-12-23 |
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