EP0325241B1 - Plastic film - Google Patents
Plastic film Download PDFInfo
- Publication number
- EP0325241B1 EP0325241B1 EP89100853A EP89100853A EP0325241B1 EP 0325241 B1 EP0325241 B1 EP 0325241B1 EP 89100853 A EP89100853 A EP 89100853A EP 89100853 A EP89100853 A EP 89100853A EP 0325241 B1 EP0325241 B1 EP 0325241B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic film
- layer
- silicone layer
- film
- silicone
- 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.)
- Revoked
Links
- 239000002985 plastic film Substances 0.000 title claims abstract description 19
- 229920006255 plastic film Polymers 0.000 title claims abstract description 19
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 21
- 230000003746 surface roughness Effects 0.000 claims abstract description 5
- 238000004049 embossing Methods 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 26
- 239000010408 film Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000004447 silicone coating Substances 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013039 cover film Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- 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
- B05D7/04—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 to surfaces of films or sheets
-
- 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
- B05D2252/00—Sheets
- B05D2252/10—Applying the material on both sides
Definitions
- the invention relates to a plastic film which is provided on one of its two surfaces with a silicone layer.
- Such films are usually used to cover self-adhesive coated films or papers.
- the low adhesive forces of the silicone layer on the covered adhesive layer make it easy to remove the cover film before the adhesive film is used as intended.
- the invention has for its object to design the plastic film so that it allows a perfect curing of the applied silicone layer without special precautions of the type described. This hardening is achieved, for example, when At all points on the coating, the release force values of equal to or less than 0.2 N / 15 mm, measured with Tesa 651 adhesive tape and stored for 2 hours at 40 ° C, must not be exceeded.
- This object is achieved in that at least the other side of the plastic film facing away from the silicone layer has a surface roughness that extends over the entire surface.
- This surface roughness results in a cushioning effect in the wound web, so that irregularities are largely eliminated and pressure points are avoided.
- the surface roughness is generated by an embossing pattern with an embossing depth of 2 to 30 ⁇ m.
- a further advantageous embodiment of the invention is that a layer with a mineral filling is provided at least on the side of the film facing away from the silicone layer.
- This mineral filling also has a cushioning effect so that irregularities cannot lead to pressure points.
- a foamed layer is provided at least on the side of the film facing away from the silicone layer.
- a further advantageous aspect of the invention results in that for the user of the siliconized film, the backside matting or embossing of the non-siliconized side creates an optical aid for identifying the film sides.
- Fig. 1 is a plastic film, which is provided on its top with a silicone layer 2. On its lower side facing away from the silicone layer, the plastic film is provided with an embossed pattern 3, which gives the plastic film a roughness.
- This embossed pattern can have irregular structures, e.g. are generated by sandblasted rolls, or have regular structures such as those transferred to the film by etched or engraved rolls during film production.
- a plastic film 11 is again provided with a silicone layer 2 on its upper side. On its lower side facing away from the silicone layer, the plastic film is provided with a layer 4 which has a mineral filling 5. This mineral filling also creates a rough surface that serves to avoid pressure points.
- a foamed layer 6 is applied to a plastic film 21 on its lower side facing away from the silicone layer 2.
- This foamed layer 6 also has a rough surface, which rests on the silicone layer 2 of the layer below.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Laminated Bodies (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Die Erfindung betrifft eine Kunststoffolie, die auf einer ihrer beiden Oberflächen mit einer Silikonschicht versehen ist. Derartige Folien werden üblicherweise zum Abdecken von selbstklebend beschichteten Folien oder Papieren eingesetzt. Die geringen Adhäsionskräfte der Silikonschicht auf der abgedeckten Klebeschicht ermöglichen ein problemloses Abziehen der Abdeckfolie vor dem verwendungsgemäßen Einsatz der Klebefolie.The invention relates to a plastic film which is provided on one of its two surfaces with a silicone layer. Such films are usually used to cover self-adhesive coated films or papers. The low adhesive forces of the silicone layer on the covered adhesive layer make it easy to remove the cover film before the adhesive film is used as intended.
Nach dem Auftragen der Silikonschicht benötigt diese eine gewisse Zeit zum Aushärten, was ohne weiteres im aufgewickelten Zustand erfolgen kann. Dabei hat sich jedoch herausgestellt, daß insbesondere durch nicht vermeidbare Dickenschwankungen in der Basisfolie Druckstellen entstehen, welche die Aushärtung nachteilig beeinflussen. Es ist deshalb ohne besondere Vorkehrungen beim Wickelvorgang, wie z.B. dem Einsatz von möglichst kurzen, drucklos gewickelten Rollen, nicht möglich, immer einwandfrei ausgehärtete Silikonbeschichtungen zu erhalten.After the silicone layer has been applied, it takes a certain amount of time to harden, which can easily be done in the wound state. It has been found, however, that pressure marks in the base film, in particular due to unavoidable fluctuations in thickness, have an adverse effect on curing. It is therefore without special precautions during the winding process, e.g. the use of rolls that are as short as possible and wound without pressure, not possible to always obtain perfectly cured silicone coatings.
Der Erfindung liegt die Aufgabe zugrunde, die Kunststoffolie so auszugestalten, daß diese ohne besondere Vorkehrungen der beschriebenen Art ein einwandfreies Aushärten der aufgetragenen Silikonschicht ermöglicht. Diese Aushärtung ist z.B. dann erreicht, wenn an allen Stellen der Beschichtung Trennkraftwerte von gleich oder weniger als 0,2 N/15 mm, gemessen mit Klebeband Tesa 651 und Lagerung von 2 Stunden bei 40°C, nicht überschritten werden.The invention has for its object to design the plastic film so that it allows a perfect curing of the applied silicone layer without special precautions of the type described. This hardening is achieved, for example, when At all points on the coating, the release force values of equal to or less than 0.2 N / 15 mm, measured with Tesa 651 adhesive tape and stored for 2 hours at 40 ° C, must not be exceeded.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß wenigstens die der Silikonschicht abgewandte andere Seite der Kunststoffolie eine Oberflächenrauhigkeit aufweist, die sich über die gesamte Oberfläche erstreckt.This object is achieved in that at least the other side of the plastic film facing away from the silicone layer has a surface roughness that extends over the entire surface.
Durch diese Oberflächenrauhigkeit wird ein Polstereffekt in der gewickelten Bahn erzielt, so daß Ungleichmäßigkeiten weitgehend eliminiert und Druckstellen vermieden werden.This surface roughness results in a cushioning effect in the wound web, so that irregularities are largely eliminated and pressure points are avoided.
Als sehr vorteilhaft hat es sich ergeben, wenn erfindungsgemäß die Oberflächenrauhigkeit durch ein Prägemuster mit einer Prägetiefe von 2 bis 30 µm erzeugt ist.It has turned out to be very advantageous if, according to the invention, the surface roughness is generated by an embossing pattern with an embossing depth of 2 to 30 μm.
Eine solche Prägung hat bereits den angestrebten Erfolg, ohne auf die Silikonbeschichtung direkt nachteilig zu wirken.Such an embossing already has the desired success without having a direct disadvantageous effect on the silicone coating.
Eine weitere vorteilhafte Ausgestaltung der Erfindung liegt darin, daß wenigstens auf der von der Silikonschicht abgewandten Folienseite eine Schicht mit einer Mineralfüllung vorgesehen ist.A further advantageous embodiment of the invention is that a layer with a mineral filling is provided at least on the side of the film facing away from the silicone layer.
Diese Mineralfüllung bringt ebenfalls einen Polstereffekt, so daß Ungleichmäßigkeiten nicht zu Druckstellen führen können.This mineral filling also has a cushioning effect so that irregularities cannot lead to pressure points.
Eine ebenfalls sehr vorteilhafte Ausgestaltung liegt erfindungsgemäß darin, daß wenigstens auf der von der Silikonschicht abgewandten Folienseite eine geschäumte Schicht vorgesehen ist.Another very advantageous embodiment according to the invention is that a foamed layer is provided at least on the side of the film facing away from the silicone layer.
Der Polstereffekt dieser geschäumten Schicht verhindert trotz ihrer sehr geringen Dicke ebenfalls sehr wirkungsvoll das Entstehen von Druckstellen.The cushioning effect of this foamed layer, despite its very small thickness, also very effectively prevents the formation of pressure points.
Als weiterer vorteilhafter Aspekt der Erfindung ergibt sich, daß für den Anwender der silikonisierten Folie durch die Rückseitenmattierung bzw. Prägung der nicht silikonisierten Seite einoptisches Hilfsmittel zur Identifizierung der Folienseiten geschaffen wird.A further advantageous aspect of the invention results in that for the user of the siliconized film, the backside matting or embossing of the non-siliconized side creates an optical aid for identifying the film sides.
In bestimmten Fällen wird die 1-seitig silikonisierte Folie auf deren Rückseite direkt mit Kleber beschichtet. In diesen Fällen erhöht sich, als weiterer vorteilhafter Aspekt, die Kleberhaftung aufgrund der durch die Aufrauhung vergrößerten Kontaktfläche.In certain cases, the one-sided siliconized film is coated directly on the back with adhesive. In these cases, as a further advantageous aspect, the adhesive adhesion increases due to the increased contact area due to the roughening.
In der Zeichnung ist die Erfindung anhand von drei Ausführungsbeispielen veranschaulicht. Dabei zeigen:
- Fig. 1
- einen Schnitt durch eine einseitig mit einer Silikonschicht versehene Kunststoffolie mit Prägung ihrer anderen Seite,
- Fig. 2
- einen Schnitt durch eine weitere Kunststoffolie, die auf einer Seite eine Silikonschicht und auf der anderen Seite eine Schicht mit Mineralfüllung trägt und
- Fig. 3
- einen Schnitt durch zwei aufeinanderliegende Kunststoffolien, die einseitig eine geschäumte Schicht tragen.
- Fig. 1
- a section through a plastic film provided on one side with a silicone layer and embossed on its other side,
- Fig. 2
- a section through another plastic film that carries a silicone layer on one side and a layer with mineral filling on the other side and
- Fig. 3
- a section through two superimposed plastic films, which carry a foamed layer on one side.
Mit 1 ist in Fig. 1 eine Kunststoffolie bezeichnet, die auf ihrer Oberseite mit einer Silikonschicht 2 versehen ist. Auf ihrer von der Silikonschicht abgewandten unteren Seite ist die Kunststoffolie mit einem Prägemuster 3 versehen, welches der Kunststoffolie eine Rauhigkeit verleiht. Dieses Prägemuster kann unregelmäßige Strukturen, wie sie z.B. durch sandgestrahlte Walzen erzeugt werden, oder regelmäßige Strukturen, wie sie durch geätzte oder gravierte Walzen bei der Folienherstellung auf die Folie übertragen werden, aufweisen.1 in Fig. 1 is a plastic film, which is provided on its top with a
Beim Aufwickeln der Folie zu einer Rolle kommt die rauhe Unterseite auf die Silikonschicht der darunterliegenden Lage zu liegen, wodurch eventuelle Ungleichmäßigkeiten ausgeglichen und damit Druckstellen vermieden werden.When the film is wound up into a roll, the rough underside comes to rest on the silicone layer of the layer below, which compensates for any irregularities and thus avoids pressure points.
Beim Ausführungsbeispiel nach Fig. 2 ist eine Kunststoffolie 11 an ihrer Oberseite wieder mit einer Silikonschicht 2 versehen. An ihrer von der Silikonschicht abgewandten unteren Seite ist die Kunststoffolie mit einer Lage 4 versehen, die eine Mineralfüllung 5 aufweist. Durch diese Mineralfüllung wird ebenfalls eine rauhe Oberfläche erzeugt, die dazu dient, Druckstellen zu vermeiden.2, a
Beim Ausführungsbeispiel nach Fig. 3 ist auf eine Kunststoffolie 21 auf ihrer von der Silikonschicht 2 abgewandten unteren Seite eine geschäumte Schicht 6 aufgebracht. Diese geschäumte Schicht 6 hat ebenfalls eine rauhe Oberfläche, welche auf der Silikonschicht 2 der darunterliegenden Lage aufliegt.3, a foamed
Claims (4)
- Plastic film (1, 11, 21) that is provided with a silicone layer (2) on one of its two surfaces, wherein at least the opposite side of the plastic film (1, 11, 21) to the side with the silicone layer (2) is rough across the whole of its surface.
- Plastic film according to claim 1, wherein the surface roughness is produced by an embossing pattern (3) with an embossing depth of 2 to 30 microns.
- Plastic film according to claim 1, wherein a layer (4) with a mineral filling (5) is provided at least on the opposite side of the film from the silicone layer (2).
- Plastic film according to claim 1, wherein a foamed layer (6) is provided at least on the opposite side of the film from the silicone layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89100853T ATE86891T1 (en) | 1988-01-21 | 1989-01-19 | PLASTIC FILM. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3801661 | 1988-01-21 | ||
| DE3801661A DE3801661A1 (en) | 1988-01-21 | 1988-01-21 | PLASTIC FILM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0325241A1 EP0325241A1 (en) | 1989-07-26 |
| EP0325241B1 true EP0325241B1 (en) | 1993-03-17 |
Family
ID=6345700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89100853A Revoked EP0325241B1 (en) | 1988-01-21 | 1989-01-19 | Plastic film |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0325241B1 (en) |
| AT (1) | ATE86891T1 (en) |
| DE (2) | DE3801661A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19820604A1 (en) * | 1998-05-08 | 1999-11-11 | Huels Troisdorf | Heat formed body of foamed material covered with siliconized plastic film on one side |
| US6149853A (en) * | 1998-08-03 | 2000-11-21 | Visteon Global Technologies, Inc. | Method for manufacturing interior door panels having concealed voids at the junction of integrally molded energy absorbers |
| DE19953707B4 (en) * | 1999-11-08 | 2007-12-27 | 4P Folie Forchheim Gmbh | Process for producing a plastic film |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746360A (en) * | 1980-09-05 | 1982-03-16 | Fuji Photo Film Co Ltd | Friction sheet |
| DE8522205U1 (en) * | 1985-08-01 | 1985-09-26 | Bischof Und Klein Gmbh & Co, 4540 Lengerich | Covering membrane for the surface protection of plastic panels |
| DE3609910A1 (en) * | 1986-03-24 | 1987-10-01 | Bauer Johann | Surgical retaining material, especially for annular ligament replacement |
| DE8703933U1 (en) * | 1987-03-16 | 1987-05-07 | Ebert Folienwerk GmbH & Co KG, 65185 Wiesbaden | Coating material |
-
1988
- 1988-01-21 DE DE3801661A patent/DE3801661A1/en active Granted
-
1989
- 1989-01-19 AT AT89100853T patent/ATE86891T1/en not_active IP Right Cessation
- 1989-01-19 DE DE8989100853T patent/DE58903761D1/en not_active Revoked
- 1989-01-19 EP EP89100853A patent/EP0325241B1/en not_active Revoked
Also Published As
| Publication number | Publication date |
|---|---|
| DE58903761D1 (en) | 1993-04-22 |
| DE3801661C2 (en) | 1990-05-10 |
| ATE86891T1 (en) | 1993-04-15 |
| DE3801661A1 (en) | 1989-08-03 |
| EP0325241A1 (en) | 1989-07-26 |
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