WO1999008256A1

WO1999008256A1 - Multilayer materials and uses

Info

Publication number: WO1999008256A1
Application number: PCT/CH1998/000333
Authority: WO
Inventors: Jules Fischer
Original assignee: Fofitec Ag
Priority date: 1997-08-08
Filing date: 1998-08-07
Publication date: 1999-02-18
Also published as: AU8527198A

Abstract

The invention concerns uses of a multilayer material (4) which can be wound on itself and comprising a single bearing layer (6), a separation layer (7) and an adhesive layer (5), as well as objects provided with such material. Said multilayer material (4) can be advantageously used in all cases where the surface of an object (1) should be provided with a separation layer (7). Said multilayer material enables the application, by dry process and simply, of a separation layer on practically any surface.

Description

Multilayer materials and uses thereof

TECHNICAL AREA

The present invention relates to self-rollable multilayer materials with a separating layer, uses of such materials and various articles produced using the same.

STATE OF THE ART

Surfaces are regularly provided with release layers, for which pressure-sensitive adhesive layers only a non-permanent, i.e. again easily and residue-free detachable liability. The surface of a so-called release paper, which serves as a carrier for self-adhesive labels, is an example of this. The separating layer is usually a silicone layer, the silicone resin being applied in liquid form to produce the layer. However, this so-called wet coating is technically demanding and is only mastered by manufacturers that specialize in it.

In general, efforts are made to make the separating layer as thin as possible, thin being only a few μm, ie between about 0.5-3 μm. On the one hand, the silicone resin is relatively expensive. On the other hand polymerize thicker silicone layers only incomplete and tend to lose their dehasive properties over time. Sufficiently thin layers with the required quality can only be produced with the known technology on certain, in particular sufficiently smooth surfaces. Normal writing or printer paper with a basis weight of 80-100 g / cm ² , as used in the office area, is much too rough and absorbent, for example. In a known application (cf. DE 295 18 288 U1), in which a silicone layer as a separating layer for a self-adhesive label is applied directly to such paper in a wet manner, the silicone layer has a layer thickness of not less than 10 μm.

PRESENTATION OF THE INVENTION

The present invention solves the problem, inter alia, of specifying how a sufficiently thin and time-stable separating layer can be applied to a practically any surface in a manner which is simple to control and inexpensive. According to the invention this is achieved by using a multilayer material according to claim 1.

Claim 3 relates to a carrier provided with such a multilayer material.

In claim 5, a form provided with a self-adhesive label is claimed, in which a piece of a multilayer material of the type according to the invention is glued to the front side of the form with its adhesive back and with a second layer of adhesive on this piece of multilayer material and a piece of one on top of it Label material are applied.

Patent claim 12 specifies a method for producing such a form, in which the second Pressure sensitive adhesive layer is applied as a hot melt or wet glue to the first separating layer of the multilayer material piece.

The claim 14 relates to a further form with an integrated, removable card, for the production of which a multilayer material according to the invention is also used.

Finally, claim 17 relates to a more specific multilayer material as such, which can also be used at least in part within the scope of the aforementioned objects.

The subclaims relate in each case to preferred refinements or developments of their superordinate objects according to the invention.

The advantages of the invention are to be seen essentially in the fact that the use of the multilayer material according to the invention eliminates the technically difficult to master wet siliconization and replaces it with easy-to-master dry application of a completely prefabricated material that has already been provided with a separating layer. When applying the multilayer material according to the invention e.g. In addition, endless paper webs in form production can run at least twice the production speeds of conventional wet siliconization.

The multilayer material according to the invention can be applied to practically any surface without restrictions due to its specific properties.

Although the multilayer material according to the invention comprises at least two layers more than a wet-applied silicone layer, its use does not generally result in a greater overall layer thickness, since the individual layers of the multilayer material can be made very thin. In particular, the thickness of the separating layer can be made thinner by up to an order of magnitude than that of a wet one, for example applied directly to a paper surface, by suitable choice of the material of the carrier layer.

This also results in savings in material costs, since the silicone resins usually used for the separating layer are much more expensive than e.g. Acrylic dispersion self-adhesive for the pressure-sensitive adhesive layer or polyester films for the carrier layer of the multilayer material according to the invention.

Finally, the thinner layer thickness of the separating layer 4 also results in greater long-term stability with regard to the dehasive properties of the separating layer.

With the form provided with a self-adhesive label according to claim 7, both the support in the label area and the label material itself can advantageously be pre-printed on both sides.

Overall, the present invention achieves improvements in terms of economy, process control, flexibility with regard to the carrier as well as product design, quality and stability.

BRIEF EXPLANATION OF THE FIGURES

The invention will be explained in more detail below on the basis of exemplary embodiments in connection with the drawing. All of them show in a sectional representation and with layers that are not to scale, and strongly exaggerated thick:

1 shows a first embodiment of a multilayer material according to the invention in a first preferred use, the result of which is a form provided with a self-adhesive label; 2 shows a further development of this embodiment, in which the label can be used as a vignette;

3 shows a second embodiment of a multilayer material according to the invention in a second preferred use, the result of which is a form provided with two self-adhesive labels; and

Fig. 4 shows a further use of the multilayer material according to its first embodiment in the context of a form with an integrated, so-called folding or butterfly card.

WAYS OF CARRYING OUT THE INVENTION

In Fig. 1, 1 denotes a carrier, which can be a single sheet of paper, but in particular an endless web of paper or still connected sheets of paper. The carrier 1 can be printed on one or both sides, which is indicated by symbolically represented print jobs 2. The carrier 1 should, for example, run in the direction of the arrow 3 and thereby pass the stations designated as a), b) and c).

In station a) is first a piece of a multi-layer material

4 according to the invention glued to its upper surface and a print job 2 which may be present there, for which purpose the multilayer material 4 is provided with a first pressure-sensitive adhesive layer 5. Overall, the multilayer material 4 is constructed here in three layers and includes the pressure-sensitive adhesive layer

5 another carrier layer 6 and a first release layer 7. In station b), a second pressure-sensitive adhesive layer 8 is applied to the surface of the first release layer 7. In station c), a piece of label material 9 is finally applied to this second pressure-sensitive adhesive layer, which piece firmly bonds to the adhesive adhesive of the second pressure-sensitive adhesive layer 8 and forms a self-adhesive label 10 together with it. Like the carrier 1, the label material 9 can consist of paper and be pre-printed on one or both sides, which is also indicated again by symbolically applied print jobs. One of these print jobs is labeled 11.

The result is a form web or a single form sheet 1 with a self-adhesive label 10 placed on one side, which can be detached from it due to the dehasive properties of the first separating layer 7 of the multilayer material 4 and can be stuck on again at another point by means of the second pressure-sensitive adhesive layer 8. 1 shows the self-adhesive label 10 in the detached state from the first separating layer 7.

If the materials of the layers of the multilayer material 4 are selected such that it is optically transparent as a whole, the print job 2 initially hidden by the self-adhesive label 10 is advantageously visible on the top of the carrier 1 when the label 10 is removed.

FIG. 2 shows a further development of the product from FIG. 1. In a station denoted by d), a full circumferential punching is additionally made from the back of the carrier 1 within the second pressure-sensitive adhesive layer 8 and preferably from all sides from its edge to the side Depth of the first separation layer 7 attached, which is illustrated by the arrows 12. If the self-adhesive label 10 'is then removed, the punched-out layers 1 of the carrier and 5-7 of the multilayer material 4 with the label 10' go along, as is shown in the left part of FIG. 2. Because of the edge 13 of the second adhesive layer 8, which preferably protrudes on all sides over these layers, the label 10 'can, however, still be glued to another location. If it is glued behind a glass pane, then a print job 2 'possibly applied to the punched-out piece of the carrier is visible through the pane. The self-adhesive label 10 'can thus advantageously be used as a vignette. It is even possible to print job 2 'only immediately before Detach and reattach the vignette 10 'and thereby personalize it individually.

A plastic film, preferably a biaxially oriented polyester film, with a thickness in the range between only 6μ and 19μ, but preferably of 12μ, is preferably used for the carrier layer 6 of the multilayer material 4. Despite this extremely small thickness - conventional silicone release papers, such as are used in the label sector today, have a thickness of between 50μ and 100μ for comparison - the carrier layer 6 forms the only supporting layer of the multilayer material 4. The first separation layer 7 is preferably a silicone layer from a fast-curing UV silicone resin with a further preferably a layer thickness between 0.5 - 1 g / m ² . The pressure sensitive adhesive of the first pressure sensitive adhesive layer 5 can be an acrylic dispersion adhesive with a layer thickness between 10 μ and 20 μ, preferably of 14 μ. The multi-layer material can be rolled up on itself. Because the pressure-sensitive adhesive layer 5 comes to rest on the separating layer 7, it can also be unrolled without any problems.

A hot melt adhesive is preferably used for the pressure sensitive adhesive of the second pressure sensitive adhesive layer 8 and this is applied in liquid form. This is preferably done in such a way that the area covered by the second pressure-sensitive adhesive layer 8 is somewhat smaller on all sides than the multi-layer material piece 4 and the label material piece 9. It is hereby achieved that the adhesive of the second pressure-sensitive adhesive layer 8 does not emerge over the edge of the label material and, if, for example, several sheets of the type of FIG. 1 are stacked on top of one another, can cause them to stick together. In addition, the pressure-sensitive adhesive layer could also be designed such that a grip zone free of pressure-sensitive adhesive is created for easier handling of the self-adhesive label 10. The embodiment of FIG. 3 differs from that in accordance with FIG. 2, on the one hand, in that here the multilayer material 14 is provided with a further, second separating layer 15 between the first adhesive layer 5 and the carrier layer 6. On the other hand, the punching 16 is carried out only to the depth of this second separating layer 15 and, moreover, approximately along the edge of the second pressure-sensitive adhesive layer 8. As a result, an endless web or a single sheet 1 with two self-adhesive labels is created, the one 10 of which 1 and the other 17 is integrated in the form material and can be removed therefrom, as shown in the left part of FIG. 3.

3, the separation value of the second separation layer 15 compared to the first pressure-sensitive adhesive layer 5 is preferably set 2-4 times, but in particular about 3 times higher than the separation value of the first separation layer 7 compared to the same pressure-sensitive adhesive layer 5. Due to this setting, the multilayer material 14 of FIG. 3 can also be rolled up on itself.

4 shows under a) a form 20 in sheet form or again in endless form with an integrated, removable card K. Parts K1 and K2 lying one above the other in the card K (FIG. 4d) are partially arranged next to one another in the form, by folding them open but can be glued together.

The card parts K1 and K2 mentioned are included in the form in two areas B1 and B2. Covering these areas B1 and B2, a piece of a carrier material 21 is glued on, which, viewed from the form 20, comprises a third pressure-sensitive adhesive layer 22 and a second carrier layer 23. The second carrier layer 23 is preferably a transparent plastic film. The card parts K1 and K2 mentioned are produced by punching in the areas B1 and B2 mentioned in the form. In the area B1 there is between the third pressure-sensitive adhesive layer 22 of the carrier material 21 and the form A piece of a multilayer material is glued in on the back, the structure of which corresponds to that of FIG. 1 and in this respect has a first separating layer 7, a first carrier layer 6 and a first pressure-sensitive adhesive layer 5. The die-cuts for producing the card parts K 1 and K 2 are congruent from the front and from the rear, die-cuts 24 and 25 are left with only a small residual thickness R in the second carrier layer 23 of the carrier material 21 be punched.

The handling of the form for removing the card K is as follows: According to FIG. 4 b), in a first step an auxiliary card or a coupon C is first removed from the area B1, which is possible due to the first separating layer 7 of the multilayer material present there. The third PSA layer 22 is thereby exposed in the area B1. The card part K2 is then broken out of the area B2 by severing the thin residual thickness R and folded over onto the pressure-sensitive adhesive layer 22 of the card part K1 exposed in the area B1 and glued to it, as shown in FIG. 4 under c). Finally, the finished card K, plasticized on both sides, can also be removed from the form by severing the residual thickness R in the area B1 according to FIG. 4 d).

The above embodiments of the multilayer material according to the invention and the uses explained are not exhaustive. In general, the multilayer material according to the invention could be used with advantage wherever it is a question of providing a surface of an object with a separating layer in order, for example, to be able to glue an object only temporarily or at least in a removable form. With the material according to the invention, a separating layer can be applied dry and in a simple manner to practically any surface. The separating layer on the surface of the multilayer material according to the invention also makes it almost indescribable. Usual inks or the like do not adhere to it. This property could be used, for example, to seal a specific print or signature on a document by pasting it over with the multilayer material according to the invention and to secure it against subsequent change. A suitable choice of the pressure sensitive adhesive could ensure that it is impossible to remove the multilayer material without destroying the base to be protected. The multilayer material would of course also have to be transparent for this application.

Claims

PATENT CLAIMS

1. Use of a self-rollable multilayer material (4, 14) with a first carrier layer (6), a first separating layer (7) and a first pressure-sensitive adhesive layer (5) for dry application of a separating layer (7) to a surface of any carrier, wherein a piece of the multilayer material (4, 14) is glued onto the carrier surface with its pressure-sensitive adhesive layer (5) and the first carrier layer is the only supporting layer of the multilayer material and the first separating layer and the first pressure-sensitive adhesive layer are arranged on different sides of the first carrier layer.

2. Use according to claim 1, characterized in that the first carrier layer (6) is a plastic film, preferably a biaxially oriented polyester film, with a thickness in

Range between 6μ and 19μ, but preferably of 12μ, and / or that the first separating layer (7) is a silicone layer, preferably a layer of a fast-curing UV silicone resin and further preferably with a layer thickness between 0.5-1 g / m, and or that between the first carrier layer (6) and the first pressure-sensitive adhesive layer (5) there is a second separation layer (15) corresponding to the first, the separation value of the second separation layer (15) being higher than the first pressure-sensitive adhesive layer (5) , preferably 2-4 times, but in particular about 3 times higher than the separation value of the first separation layer (7) compared to the same pressure-sensitive adhesive layer (5).

3. On a surface a release coating (7) having carrier (1), characterized in that on the surface of the carrier (1) a piece of a self-rollable multilayer material (4, 14) with a first carrier layer (6), one first separating layer (7) and a first pressure-sensitive adhesive layer (5) with its pressure-sensitive adhesive layer (5) is glued on, the first carrier layer being the only supporting layer of the multilayer material and the first separating layer and the first pressure-sensitive adhesive layer being arranged on different sides of the first carrier layer.

4. Carrier according to claim 3, characterized in that the first carrier layer (6) is a plastic film, preferably a biaxially oriented polyester film, with a thickness in the range between 6μ and 19μ, but preferably of 12μ, and / or that the first separating layer (7) is a silicone layer, preferably a layer of a fast-curing UV silicone resin and more preferably with a layer thickness between 0.5-1 g / m, and or that between the first carrier layer (6) and the first pressure-sensitive adhesive layer (5) there is a second separation layer (15) corresponding to the first, the separation value of the second separation layer (15) higher than the first pressure-sensitive adhesive layer (5), preferably 2-4 times, but in particular about 3 times higher than the separation value of the first separation layer ( 7) is set relative to the same pressure-sensitive adhesive layer (5).

5. With a self-adhesive label (10) provided form (1), characterized in that a piece of a self-rollable multilayer material (4, 14) with a first carrier layer (6), a first separating layer (7) and a first Pressure-sensitive adhesive layer (5) with its pressure-sensitive adhesive layer (5) is glued to the front of the form and that a second pressure-sensitive adhesive layer (8) and a piece of label material (9) are applied to this piece of multilayer material (4, 14), the first Backing layer is the only supporting layer of the multilayer material and the first separating layer and the first pressure-sensitive adhesive layer are arranged on different sides of the first backing layer.

6. Form according to claim 5, characterized in that the first carrier layer (6) is a plastic film, preferably a biaxially oriented polyester film, with a thickness in the range between 6μ and 19μ, but preferably of 12μ, and / or that the first separating layer (7) is a silicone layer, preferably a layer of a fast-curing UV silicone resin and more preferably with a layer thickness between 0.5-1 g / m, and / or that between the first carrier layer (6) and the first pressure-sensitive adhesive layer (5 ) there is a second separation layer (15) corresponding to the first, the separation value of the second separation layer (15) compared to the first pressure-sensitive adhesive layer (5) higher, preferably 2-4 times, but in particular about 3 times higher than the separation value of the first separation layer (7) is set relative to the same pressure-sensitive adhesive layer (5).

7. Form (1) according to one of claims 5 or 6, characterized in that the form front is printed under the self-adhesive label (10).

8. Form (1) according to one of claims 5-7, characterized in that the piece of label material (9) is printed on its underside oriented towards the form (1).

9. Form (1) according to any one of claims 5-8, characterized in that the second pressure-sensitive adhesive layer (8) is none other than the piece of label material (9), the piece of label material (9) preferably the second pressure-sensitive adhesive layer (8) on all sides protrudes and / or an adhesive-free grip zone is provided.

10. Form (1) according to one of claims 5-9, characterized in that the self-adhesive label is designed as an individually personalizable vignette (10 ') by the form (1) in the area of the self-adhesive label and at a distance from the outside Edge of the second layer of pressure sensitive adhesive (8) from its Back is punched all the way up to the first separating layer (7).

11. Form (1) according to any one of claims 5-9, characterized in that the multilayer material (14) between the first carrier layer (6) and the first pressure-sensitive adhesive layer (5) has a second, the first corresponding release layer (15), wherein the separation value of the second separation layer (15) compared to the first pressure-sensitive adhesive layer (5) is higher, preferably between 2-4 times, but in particular about 3 times higher than the separation value of the first separation layer (7) compared to the same pressure-sensitive adhesive layer (5) and that Providing a second self-adhesive label (17) the form (1) in the area of the self-adhesive label (17) and at a distance from the outer edge of the multi-layer material piece (14) from the back to the second separating layer (15) is completely punched .

12. A method for producing a form (1) according to any one of claims 5 to 11, characterized in that the second pressure-sensitive adhesive layer (8) is applied as a hot melt or wet glue to the first separating layer (7) of the multi-layer material piece (4, 14).

13. The method according to claim 12, characterized in that the form (1) on its front side in the area of the self-adhesive label (10, 10 ') before the multilayer material piece (4, 14) and / or the label material piece (9) is attached its underside, which is oriented towards the form (1), is printed on the second pressure-sensitive adhesive layer (8) before it is applied.

14. Form with integrated card (K), parts (K1, K2) lying one above the other in the form being arranged in the card (K), but can be glued to one another by folding them open, wherein on the back of the form, the areas (B1, B2) containing the above-mentioned card parts K1, K2), a piece of a carrier material (21) is glued on, which seen from the form (1), a third layer of pressure-sensitive adhesive (22) and one comprises second carrier layer (23), said card parts (K1, K2) being produced by at least one punching in said areas (B1, B2) in form (1), and at least in one of the areas (B1) between the third A third separating layer (7) is present in the pressure-sensitive adhesive layer (22) of the carrier material (21) and the back of the form, characterized in that the third separating layer is functionally formed by the one separating layer (7) on the back of the form by means of a first adhesive layer (5) glued piece of a self-rollable multilayer material (4, 14) with a first carrier layer (6), the first separating layer (7) and the first pressure-sensitive adhesive layer (5), the the first carrier layer is the only supporting layer of the multilayer material and the first separating layer and the first pressure-sensitive adhesive layer are arranged on different sides of the first carrier layer.

15. Form according to claim 14, characterized in that the first carrier layer (6) is a plastic film, preferably a biaxially oriented polyester film, with a thickness in

Range between 6μ and 19μ, but preferably of 12μ, and / or that the first separating layer (7) is a silicone layer, preferably a layer of a fast-curing UV silicone resin and further preferably with a layer thickness between 0.5-1 g / damn.

16. Form according to one of claims 14 or 15, characterized in that the at least one punching for producing the card (K) or its parts (Kl, K2) one while leaving only a small residual thickness (R) in the second Carrier layer (23) of the carrier material (21) is stamped.

17. Self-rollable multilayer material (4, 14) with a first carrier layer (6), a first separating layer (7) and a first pressure-sensitive adhesive layer (5), the first carrier layer being the only supporting layer of the multilayer material and the first separating layer and the first pressure-sensitive adhesive layer is arranged on different sides of the first carrier layer, characterized in that between the first carrier layer (6) and the first pressure-sensitive adhesive layer (5) it has a second separation layer (15) corresponding to the first, the separation value of the second separation layer (15) is set higher than the first pressure-sensitive adhesive layer (5), preferably between 2-4 times, but in particular about 3 times higher than the separation value of the first separation layer (7) compared to the same pressure-sensitive adhesive layer (5).

18. Multi-layer material (4, 14) according to claim 17, characterized in that the first carrier layer (6) is a plastic film, preferably a biaxially oriented one

Polyester film, with a thickness in the range between 6μ and 19μ, but preferably of 12μ, and / or the first separating layer (7) is a silicone layer, preferably a layer of a fast-curing UV-silicone resin and further preferably with a layer thickness between 0.5 - 1 g / m ² .