DE102004039971A1 - Decorative double-sided adhesive film manufacture involves powder coating adhesive surface of one substrate and laminating onto similar substrate with powder coating facing second substrate - Google Patents

Abstract

First(1) and second(1') strip substrates are prepared, both having two adhesive coated surfaces(3,4;3',4'). A first adhesive surface(4) of the first adhesive substrate is powder coated(5) and latter is laminated with the second strip with the powder coated surface(5) of the first substrate covering one of the adhesive surfaces of the second substrate. The first adhesive surface(4') of the second strip substrate(1') may also be powder coated(5') and then the two substrates laminated together so that the powder coated surface(5) of the first substrate(1) covers the powder coated surface of the second substrate and a film(8) is formed with adhesive surfaces(3,3') on the outer surfaces. Both substrates are similar double sided adhesive tapes prior to powder coating. During lamination both substrates are brought together with the powder coated surface of the first substrate covering one of the adhesive surfaces of the second substrate and pressure and/or temperature applied. Alternatively where both substrates are powder coated the two powder coated surfaces are brought together and pressure and/or heat applied. In both cases the lamination may be achieved by passing both substrates between heated rolls. An independent claim is included for a decorative film with adhesive on both surfaces produced by the claimed method.

Description

The Invention relates to a process for the production of decorative, double-sided adhesive films obtainable by this process decorative, double-sided adhesive films and their use.

Out the prior art are decorative, especially colored, both sides Adhesive films known. Such films are for example needed for gluing windows in tops of mobile phones. One such window is often Made of a crystal clear material, by means of a colored, two-sided adhesive film attached on the one hand in the upper part of the mobile phone and on the other hand is framed in color by this slide.

The so far for Decorative films used for this purpose are predominantly films Made of a plastic that contains a dye or a luminescent Substance colored is and then both sides has been coated with a self-adhesive. These slides However, they are undesirable high thickness and do not light up to the desired extent. Moreover, the plastic needed for the film is relatively expensive and therefore usually needs in large quantities, which easily exceed a ton can, be ordered. The following necessary double-sided coating of the adhesive with the self-adhesive becomes more expensive continue the slide.

task The invention is to the disadvantages of the prior art remove. It is intended in particular a method for producing a decorative, double-sided adhesive film can be specified with the Such films produced comparatively quickly and inexpensively can be. Furthermore, a decorative, double-sided adhesive film, by this method is available and uses of the film.

These The object is solved by the features of claims 1 and 12 to 15. Advantageous embodiments The inventions result from the features of claims 2 to 11th

• (a) Bereitstellen eines ersten und eines zweiten bahnförmigen Substrates, wobei sowohl das erste als auch das zweite bahnförmige Substrat eine erste und eine zweite adhäsive Oberfläche aufweisen;
• (b) Pulverbeschichten der ersten adhäsiven Oberfläche des ersten bahnförmigen Substrates mit einem Pulver; und
• (c) Kaschieren des ersten bahnförmigen Substrates auf das zweite bahnförmige Substrat derart, dass die erste, pulverbeschichtete Oberfläche des ersten Substrates eine der adhäsiven Oberflächen des zweiten Substrates bedeckt.

According to the invention, a method is provided for producing a decorative, double-sided adhesive film comprising the following steps:

• (A) providing a first and a second web-shaped substrate, wherein both the first and the second web-shaped substrate having a first and a second adhesive surface;
• (b) powder coating the first adhesive surface of the first web substrate with a powder; and
• (c) laminating the first web-shaped substrate onto the second web-shaped substrate such that the first, powder-coated surface of the first substrate covers one of the adhesive surfaces of the second substrate.

Under The term "decorative" becomes an optical one Effect understood from the powder coating with the powder is caused. This can be for example a color effect, an afterglow, a glitter effect, or a combination of these.

The First and second substrates should be optically transparent.

• (a) Bereitstellen eines ersten und eines zweiten bahnförmigen Substrates, wobei sowohl das erste als auch das zweite bahnförmige Substrat eine erste und eine zweite adhäsive Oberfläche aufweisen;
• (b1) Pulverbeschichten der ersten adhäsiven Oberfläche des ersten bahnförmigen Substrates mit einem Pulver;
• (b2) Pulverbeschichten der ersten adhäsiven Oberfläche des zweiten bahnförmigen Substrates mit einem Pulver; und
• (c) Kaschieren des ersten bahnförmigen Substrates auf das zweite bahnförmige Substrat derart, dass die erste, pulverbeschichtete Oberfläche des ersten bahnförmigen Substrates die erste, pulverbeschichtete Oberfläche des zweiten bahnförmigen Substrates bedeckt.

In one embodiment of the invention, a surface of the second web-shaped substrate is also coated with a powder. This method then includes the steps:

• (A) providing a first and a second web-shaped substrate, wherein both the first and the second web-shaped substrate having a first and a second adhesive surface;
• (b1) powder coating the first adhesive surface of the first web-shaped substrate with a powder;
• (b2) powder coating the first adhesive surface of the second web-shaped substrate with a powder; and
• (c) laminating the first web-shaped substrate onto the second web-shaped substrate such that the first, powder-coated surface of the first web-shaped substrate covers the first, powder-coated surface of the second web-shaped substrate.

Conveniently, the first web-shaped substrate in step (a) is similar to the second web-shaped substrate in both construction and composition. The first web-shaped substrate and the second web-shaped substrate are preferably web-shaped substrates, particularly preferably double-sided pressure-sensitive adhesive tapes. Suitable pressure-sensitive adhesive tapes are the pressure-sensitive adhesive tapes sold under the name tesafix ^© by the company, tesa AG, Hamburg, DE, for example the adhesive tape with the article number 4965. This adhesive tape consists of a polyethylene terephthalate film which is coated on both sides with a pressure-sensitive adhesive such as acrylate adhesive.

The powder used for the powder coating is preferably a pigment, more preferably a luminescent pigment or a pigment having a glittering effect. A suitable after luminous pigment is the pigment LUMILUX green SN-F2 from Honeywell, Seelze, DE, with the item number 50095. A suitable pigment with a glitter effect is the pigment nail polish glitter No. L3100 / KT25035 blue from Geka-Brush, Bechhofen, DE ,

Conveniently, resembles the powder with which the first adhesive surface of the first web-shaped substrate powder-coated, the powder with which the first adhesive surface of the second web-like Substrates is powder coated. For both coatings is thus using the same powder.

In a preferred embodiment For example, in step (a), the first and second substrates and both substrates are coated with the same powder.

to Powder coating is the respective web-shaped substrate expediently passed substantially vertically through a reservoir of the powder or is passed by such. The substrate guide takes place in such a way that the first adhesive surface of the substrate at least temporarily in contact with the powder. The second adhesive surface is allowed do not come in contact with the powder. This is the web-shaped substrate along an inner wall of the reservoir and past the powder guided. Thus, the second adhesive passes surface of the substrate facing the inner wall, not with the powder in contact.

• – Zusammenführen des ersten bahnförmigen Substrates und des zweiten bahnförmigen Substrates derart, dass die erste, pulverbeschichtete Oberfläche des ersten bahnförmigen Substrates eine der Oberflächen des zweiten bahnförmigen Substrates bedeckt; und
• – Einwirkung von Druck und/oder Temperatur auf das so erhaltene Gebilde aus dem ersten und dem zweiten bahnförmigen Substrat.

If only the first substrate is coated with a powder, the lamination in step (c) should comprise the following steps:

• - merging the first web-shaped substrate and the second web-shaped substrate such that the first, powder-coated surface of the first web-shaped substrate covers one of the surfaces of the second web-shaped substrate; and
• - The effect of pressure and / or temperature on the resulting structure of the first and the second web-shaped substrate.

• – Zusammenführen des ersten bahnförmigen Substrates und des zweiten bahnförmigen Substrates derart, dass die erste, pulverbeschichtete Oberfläche des ersten bahnförmigen Substrates die erste, pulverbeschichtete Oberfläche des zweiten bahnförmigen Substrates bedeckt; und
• – Einwirkung von erhöhtem Druck und/oder erhöhter Temperatur auf das so erhaltene Gebilde aus dem ersten und dem zweiten bahnförmigen Substrat.

If both the first and the second substrate are coated with a powder, the lamination in step (c) should comprise the following steps:

• - merging the first web-shaped substrate and the second web-shaped substrate such that the first, powder-coated surface of the first web-shaped substrate covers the first, powder-coated surface of the second web-shaped substrate; and
• - Exposure of increased pressure and / or elevated temperature on the resulting structure of the first and the second web-shaped substrate.

To the Laminating become the first web-shaped substrate and the second weblike Substrate expediently merged between two synchronously running, heated rollers and there elevated Pressure and / or elevated Temperature exposed.

The Laminating causes a partial incorporation of the powder in the first surface of the respective substrate and a welding of the two substrates together.

The obtained by the process according to the invention decorative, double-sided adhesive films can be further processed, in which are made from the slides diecuts. For example, a with a luminescent pigment powder-coated double-sided Pressure-sensitive adhesive tape to a second coated with the same pigment laminated double-sided pressure-sensitive adhesive tape, so can from the thus obtained web-like Foil diecuts are made, in turn, for manufacture of luminescent fly traps are usable. Furthermore, the Tape itself used to window in the top of mobile phones gluing, resulting in a luminescent window frame becomes.

Punched, that of a film according to the invention, where a substrate is coated with a pigment with a glittering effect was, could, received as glittering windows for Mobile phones are used.

The Invention will now be described by way of example with reference to FIG closer to the drawings explained. It shows

1a - 1c in a schematic cross-sectional representation of a first embodiment of the method according to the invention and

2a - 2c in a schematic cross-sectional representation of a second embodiment of the method according to the invention.

According to 1a becomes a first sheet-shaped substrate 1 provided, consisting of a carrier film 2 consists. The top of the carrier film 2 is with a layer 4 covered by a pressure-sensitive adhesive. The underside of the carrier film 2 is with a layer 3 covered by the same pressure-sensitive adhesive. The layer 4 represents the first adhesive surface of the substrate 1 while the shift 3 the second adhesive top of the substrate 1 represents. Further, a second sheet-shaped substrate 1' provided, its structure and its composition to the substrate 1 like. This is through the use the same reference numerals, supplemented by a dash indicated. Thus, the substrate exists 1' from a carrier foil 2 ' whose top is covered with a layer 4 ' from the PSA that make up the layers 3 and 4 of the substrate 1 are formed, covered and their bottom with a layer 3 ' is covered by the same PSA. Both substrate 1 as well as substrate 1' are optically transparent.

By powder coating the layer 4 of the substrate 1 becomes the substrate 1 in substrate 6 that a powder coating 5 has, transferred ( 1b ). Likewise becomes layer 4 ' of the substrate 6 ' by powder coating with a powder of substrate 1' receive. The substrate 6 is then on substrate 6 ' laminated like this ( 1c ) that the powder coating 5 of the substrate 6 the powder coating 5 ' of the second substrate 6 ' covered. By laminating the layers 5 and 5 ' to a layer 7 welded, resulting in the inventive film 8th is obtained due to the upper layer 3 and the lower layer 3 ' from the PSA is adhesive on both sides. The decorative effect depends on the powder used. Due to the optical transparency of the substrate 1 and substrate 2 the powder is visible from the outside and determines the optical effect of the film 8th ,

In a second embodiment is according to 2a a first web-shaped substrate 101 provided, consisting of a carrier film 102 consists. The top of the carrier film 102 is with a layer 104 covered by a pressure-sensitive adhesive. The underside of the carrier film 102 is with a layer 103 covered by the same pressure-sensitive adhesive. The layer 104 represents the first adhesive surface of the substrate 101 while the shift 103 the second adhesive top of the substrate 101 represents. Further, a second sheet-shaped substrate 101 ' provided, its structure and its composition to the substrate 101 like. This is indicated by the use of the same reference numerals supplemented by a dash. Thus, the substrate exists 101 ' from a carrier foil 102 ' whose top is covered with a layer 104 ' from the PSA that make up the layers 103 and 104 of the substrate 101 are formed, covered and their bottom with a layer 103 ' is covered by the same PSA. Both the substrate 101 as well as the substrate 101 ' are optically transparent.

By powder coating the layer 104 of the substrate 101 becomes the substrate 101 in substrate 106 that a powder coating 105 has, transferred ( 2 B ). The substrate 101 ' will not be powder coated. The substrate 106 is then on the substrate 101 ' laminated like this ( 2c ) that the powder coating 105 of the substrate 106 one of the two surfaces of substrate 101 ' ie either layer 103 ' or 104 ' covered (in 2c is this layer 104 ' ). By laminating the layers 105 and 104 ' to a layer 107 welded and the powder in layer 107 incorporated homogeneously, whereby by the film according to the invention 108 is obtained due to the upper layer 103 and the lower layer 103 ' from the PSA is adhesive on both sides. The decorative effect depends on the powder used. Due to the optical transparency of the substrate 101 and substrate 101 ' the powder is visible from the outside and determines the optical effect of the film 108 ,

example 1

substratum 1 was a 200 micron thick, double-sided adhesive pressure-sensitive adhesive tape, which is sold under the name tesafix ^© by the company, tesa AG, Hamburg, DE (Article No. 4965). The pressure-sensitive adhesive tape has a PET carrier film (PET: polyethylene terephthalate) and layers of acrylate adhesive as pressure-sensitive adhesives.

For substrate 1' was the same pressure sensitive adhesive tape as for substrate 1 used.

When Powder became the luminescent pigment LUMILUX Green SN-F2 Honeywell, Seelze, DE.

substratum 1 and substrate 1' were coated with the powder by passing the respective pressure sensitive adhesive tape on the inside of a container forming the reservoir for the pigment substantially vertically through a reservoir of the pigment. The first surface of the respective pressure-sensitive adhesive tape was temporarily in contact with the pigment. The second adhesive surface of the pressure-sensitive adhesive tape is covered with a release film. She did not come in contact with the pigment.

The substrates thus obtained each had a powder-coated surface. The amount of pigment on the surface of the pressure-sensitive adhesive tape was between 30 and 100 g / m ² , depending on the coating conditions selected.

The two substrates were laminated on each other so that the powder-coated surfaces face each other and cover each other (powder on powder). For this purpose, two heated to about 130 ° C heated synchronously running rolls were used. The superimposed substrates were passed through the nip between these rollers, whereby the pigment was partially incorporated into the PSA and the two substrates were welded together. It became a well-luminescent, thin, double-sided adhesive Received ribbon. This tape can be used to make luminescent fly traps. Furthermore, from this band can be made by means of templates luminescent window frames for mobile phones.

Example 2

It The same substrates as in Example 1 were used.

When Powder became the pigment nail polish glitter No. L3100 / KT25035 blue The company Geka-Brush, Bechhofen, DE, used that a glittering effect having.

in the Contrary to Example 1, only one of the pressure-sensitive adhesive tapes with the pigment coated. The coating was carried out as in Example 1. Subsequently For example, the two substrates were so stacked on each other at room temperature laminated so that the powder-coated surface of the first substrate of the second substrate was covered. These were two synchronous running Rollers used. The superimposed substrates were through passed the nip between these rollers, whereby the pigment in the PSA partially incorporated and the two substrates welded together were. It was a blue glittering, thin, double-sided adhesive Received ribbon. Out of this band can using a stencil punched for glittering window frames for mobile phones be made. However, the tape can also be used as a roll product become.

1

first web form substratum

1'

second web form substratum

2

Carrier film of substrate 1

2 '

Carrier film of substrate 2

3

second adhesive surface of substrate 1 (Layer of a PSA)

3 '

second adhesive surface of substrate 2 (Layer of a PSA)

4

first adhesive surface of substrate 1 (Layer of a PSA)

4 '

first adhesive surface of substrate 2 (Layer of a PSA)

5

powder-coated first adhesive surface of substrate 1

5 '

powder-coated first adhesive surface of substrate 1

6

first substrate with powder-coated surface 5

6 '

second substrate with powder-coated surface 5

7

Layer, made of the first adhesive surface 5 and 5 '

8th

inventive film

101

first web form substratum

101 '

second web form substratum

102

Carrier film of substrate 1

102 '

Carrier film of substrate 2

103

second adhesive surface of substrate 1 (Layer of a PSA)

103 '

second adhesive surface of substrate 2 (Layer of a PSA)

104

first adhesive surface of substrate 1 (Layer of a PSA)

104 '

first adhesive surface of substrate 2 (Layer of a PSA)

105

powder-coated first adhesive surface of substrate 1

106

first substrate with powder-coated surface 5

107

Layer, made of the first adhesive surface 5 and 5 '

108

inventive film

Claims (15)

Method of making a decorative, double-sided adhesive film comprising (a) providing a first and a second sheet-shaped Substrates, wherein both the first and the second web-shaped substrate a first and a second adhesive surface exhibit; (b) powder coating the first adhesive surface of the first sheet-shaped Substrate with a powder; and (c) laminating the first web-like Substrates on the second sheet-like Substrate such that the first, powder-coated surface of the first substrate one of the adhesive surfaces covered by the second substrate. Method according to claim 1, characterized in that that it includes the following steps: (a) provide a first and a second sheet-shaped Substrates, wherein both the first and the second web-shaped substrate a first and a second adhesive surface exhibit; (b1) powder coating the first adhesive surface of the first sheet-shaped Substrate with a powder; (b2) powder coating the first adhesive surface of the second web-shaped Substrate with a powder; and (c) laminating the first web-like Substrates on the second sheet-like Substrate such that the first, powder-coated surface of the first sheet-shaped Substrates the first, powder-coated surface of the second web-shaped substrate covered. A method according to claim 1 or claim 2, characterized characterized in that the first web-shaped substrate in step (a) the second web-shaped substrate like. Method according to one of the preceding claims, characterized in that the first web-shaped substrate and the second web-shaped substrate weblike Substrates are. Method according to one of the preceding claims, characterized in that the first web-shaped substrate and the second web-shaped substrate double-sided pressure-sensitive adhesive tapes are. Method according to one of the preceding claims, characterized characterized in that the powder is a pigment. Method according to one of the preceding claims, characterized characterized in that the powder is a luminescent pigment. Method according to one of claims 2 to 7, characterized that the powder with which the first adhesive surface of the first web-shaped substrate powder-coated, which resembles powder, with which the first adhesive surface of the second web-like Substrates is powder coated. Method according to one of claims 1 and 3 to 7, characterized in that the lamination in step (c) comprises the following steps includes: - Merging the first sheet-shaped Substrates and the second web-shaped Substrates such that the first, powder-coated surface of the first sheet-shaped Substrates one of the surfaces of the second web-shaped Substrates covered; and - action of pressure and / or temperature on the structure thus obtained from the first and second web-shaped Substrate. Method according to one of claims 2 to 8, characterized in that the lamination in step (c) comprises the following steps: - Merging the first sheet-shaped Substrates and the second web-shaped Substrates such that the first, powder-coated surface of the first sheet-shaped Substrates the first, powder-coated surface of the second web-shaped substrate covered; and - action of heightened Pressure and / or elevated temperature on the resulting structure of the first and the second web-shaped substrate. A method according to claim 9 or claim 10, characterized in that the first web-shaped substrate and the second weblike merged between two synchronously running, heated rollers and there elevated Pressure and / or elevated Be exposed to temperature. Decorative, double-sided adhesive film, available through the method according to any one of claims 1 to 11. Use of a film according to claim 12 for the production of fly traps. Use of a film according to claim 12 for gluing from window frames for Mobile phones in their tops. Use of a film according to claim 12 as a window frame for mobile phones.