SIDE PASSIVATION

Abstract

Production of a passivation layer from at least one mass, the mass forming a tearable protective layer for a first side surface of an adhesive roll after drying and/or after a chemical reaction. Performing the passivation of a side surface of an adhesive roll more quickly and also in a simpler manner is provided by a method having the following steps: a) applying at least one first layer of the mass to a surface or to both surfaces of a production base for the passivation element, the layer adhering to the production base; b) at least partially drying and/or curing the layer to form a passivation layer. Production of a passivation element by a passivation layer is achieved by at least one of the following steps: cutting the passivation layer to size with or without the production base and/or removing part of the passivation layer from the production base as the passivation element.

Claims

1. A production of a passivation layer made of at least one mass, wherein the mass is dried and/or after a chemical reaction forms a protective layer that has an elongation strength for a first side surface of an adhesive roll wherein the method comprises the following steps: a) direct or indirect coating of a first surface or both opposite surfaces of a production substrate for a passivation element with the mass, wherein the coating occurs in a thickness of between 0.2 mm and 1.5 mm, or between 0.01 mm and 0.5 mm by spray, immersion or squeegee coating or using an offset printing, screen printing, gravure printing or transfer printing method; b) the at least partial drying and/or hardening of the layer to form a passivation layer.

2. The production of a passivation layer according to claim 1, with the following additional steps: c) application of at least one cover layer or a material that differs from the mass onto the layer before or after the at least partial or full drying and/or hardening of the layer.

3. The production of a passivation layer according to claim 1, wherein the production substrate that is at least coated with the passivation layer is rolled up into rolled goods.

4. The production of a passivation element with a passivation layer according to claim 1 by at least one of the following steps: cutting to size of the passivation layer with or without the production substrate and/or detachment of a part of the passivation layer from the production substrate as a passivation element.

5. The passivation element produced according to claim 4, wherein the passivation element or the passivation layer does not have a stable form, but is self-supporting and/or elastically formable.

6. The passivation element or passivation layer according to claim 1, wherein the passivation element or the passivation layer has an average thickness of between 0.02 mm and 1.5 mm.

7. The passivation element or passivation layer according to claim 1, wherein the passivation element or the passivation layer has a surface area of between 50 cm.sup.2 and 600 cm.sup.2.

8. The passivation element or passivation layer according to claim 1, wherein the passivation element or the passivation layer has a specific elongation or tensile strength in accordance with DIN EN ISO 527 of between 0.01 N/mm.sup.2 and 10 N/mm.sup.2 and an elongation at break longitudinally and laterally of less than 20%.

9. A method for passivating a first side area of an adhesive roll with a passivation element or with a passivation layer that does not have a stable form but is self-supporting and/or elastically formable, using the production method according to claim 1, wherein the passivation element or the passivation layer together with the production substrate is adjoined with the adhesive roll as a compound, or the passivation element is detached alone from the production substrate and pressed onto the first side surface and is thereby adjoined to the adhesive roll at least via adhesion forces of the passivation element or the passivation layer.

10. The method according to claim 9, wherein the method has the following steps: the cutting to size of the passivation layer or the passivation element alone in a geometrically similar or congruent manner in relation to the first side surface.

11. The method according to claim 9, wherein the method has the following steps: a) unrolling of the rolled goods in an X direction; b) bringing together of the first side surface with the passivation element or with the passivation layer in a Y direction, essentially at right-angles to the X direction; c) detaching of the adhesive roll together with the passivation element from the production substrate; d) subsequent guiding of the rolled goods in the X direction; e) repeating of steps b) to d) with additional adhesive rolls.

12. The production of a passivation layer according to claim 2, wherein the production substrate that is at least coated with the passivation layer is rolled up into rolled goods.

13. The production of a passivation element with a passivation layer according to claim 12 by at least one of the following steps: cutting to size of the passivation layer with or without the production substrate and/or detachment of a part of the passivation layer from the production substrate as a passivation element.

14. The passivation element produced according to claim 13, wherein the passivation element or the passivation layer does not have a stable form, but is self-supporting and/or elastically formable.

15. The passivation element or passivation layer according to claim 6, wherein the passivation element or the passivation layer has an average thickness of between 0.05 mm and 0.1 mm.

16. The passivation element or passivation layer according to claim 15, wherein the passivation element or the passivation layer has a surface area of between 125 cm.sup.2 and 175 cm.sup.2.

17. The passivation element or passivation layer according to claim 16, wherein the passivation element or the passivation layer has a specific elongation or tensile strength in accordance with DIN EN ISO 527 of between 0.01 N/mm.sup.2 and 10 N/mm.sup.2 and an elongation at break longitudinally and laterally of less than 5%.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Further advantages and details of the invention are explained in the description and in the figures, in which:

[0029] FIG. 1a-d shows the production of a passivation element or a passivation layer and a method for passivating an adhesive roll;

[0030] FIG. 2 I-IV shows further methods for passivating an adhesive roll;

[0031] FIG. 3 shows a profile through the passivation layer or passivation element with a layer;

[0032] FIG. 4 shows a profile through the passivation layer or passivation element with two layers of the same thickness;

[0033] FIG. 5 shows a profile through the passivation layer or passivation element with two layers of different thicknesses;

[0034] FIG. 6 shows a profile through the passivation layer or passivation element with a cover layer made of a powder or granulate.

DETAILED DESCRIPTION OF THE INVENTION

[0035] The methods shown in FIGS. 1a to 1d for producing a passivation element 1 or passivation layer 1.1. for passivating an adhesive roll 4 initially differ in the manner in which the passivation element 1 or passivation layer 1.1 is applied to a first side surface 4.1 of the adhesive roll 4. In all methods, in a first step A according to FIGS. 1a to 1d, a first layer 1a of a viscous mass is applied on a first surface 2.1 of a production substrate 2. The viscous mass can also be rolled out on a second surface 2.2 of the production substrate 2. This dries and/or reacts at least partly chemically and as a result forms a passivation layer 1.1 which adheres on the production substrate 2, has elongated strength and has elastic properties. The form that is here created by the passivation layer 1.1 on the production substrate 2 is variable depending on the area of use. According to FIG. 1a, the production substrate 1.1 is applied in the form of a circle; according to FIG. 1b, the passivation element 1 is applied to the production substrate 2 in a geometrically undefined manner; according to FIGS. 1c and 1d, the passivation element 1 is in turn a square or at least a rectangle.

[0036] In a step B1 of the method according to FIG. 1a, the production substrate 1.1 together with the production substrate 2 is now placed onto a first side surface 4.1 of an adhesive roll 4. Through this placement, an adhesion between the passivation layer 1.1 and the adhesive roll 4 is achieved. In the following step B2, a passivation layer 1.1 with the production substrate 2 is applied in the same manner to a second side surface 4.2 of the adhesive roll 4. In a following optional further method step, although one that is not shown, the production substrates 2 are removed from the passivation layer 1.1. The passivation elements 1 thus created remain on the adhesive roll 4. In the areas in which the production substrate 1.1 does not adhere to the adhesive roll 4, it is removed from the adhesive roll 4 together with the production substrate 2.

[0037] The method according to FIG. 1b pursues another path. Instead of laying the passivation layer 1.1 onto the first side surface 4.1, this is separated or pulled off from the production substrate 2 in step B3. Through the pulling off, a passivation element 1 is created that is processed separately without the production substrate 2. The passivation element 1 is here self-supporting and adheres on the first side surface 4.1. Finally, in step B4, the second side surface 4.2 of the adhesive roll 4 is equipped with the same type of passivation element 1. In a subsequent optional additional method step, although one that is not shown, areas of the passivation layer 1.1 that do not adhere to the adhesive roll 4 are removed from the adhesive roll 4.

[0038] According to FIG. 1c, the passivation layer 1.1 is applied to the production substrate 2 in the form of a square. In a step S, after drying and/or hardening, the production substrate 1.1 is cut to size on the production substrate 2. As a result of this cutting to size, the passivation element 1 is created in the form of a circle. In step B5, the passivation element 1 is applied without the production substrate 2 on the first side surface 4.1 of the adhesive roll 4. This final step is repeated for the second side surface 4.1 of the adhesive roll 4.

[0039] In the method presented in FIG. 1d, after step A, the adhesive roll 4 is placed with its first side surface 4.1 on the passivation layer 1.1 in step B6. Here, the passivation layer 1.1 adheres to the adhesive roll 4 in the area of the first side surface 4.1. When the adhesive roll 4 is removed, the passivation layer 1.1 adhering to the adhesive roll 4 is detached from the production substrate 2, as a result of which the passivation element 1 is created, which adheres to the adhesive roll 4, and as a result of which at the same time, a gap 1.2 is created in the passivation layer 1.1. This method can be described as a type of embossing method, in which the passivation layer 1.1 is detached by pressing on and lifting off the adhesive roll 4 from the production substrate 2.

[0040] In particular, the automated passivation of adhesive rolls is possible by means of a method that draws on the method described above according to FIG. 1d, and which is shown in FIG. 2. After Step I, the passivation layer 1.1 is applied to a strip-shaped production substrate 2, which is produced as rolled goods 3.1 and which is tensioned in an X direction. The rolled goods 3.1 are unrolled to the left and after passivation are rolled up to the right. The adhesive roll 4 is pressed onto the passivation layer 1.1 in a Y direction at right-angles to the X direction, as a result of which the passivation layer 1.1 adheres to the adhesive roll 4 in the area of contact with the adhesive roll 4. After detaching the adhesive roll 4 from the production substrate 2 according to step II, a gap 1.2 is created in the passivation layer 1.1 in the form of the passivation element 1. In order to passivate the next adhesive roll 4, according to step III, the rolled goods 3.1 are subsequently guided at least around the breadth of the adhesive roll 4 in the X direction and a further adhesive roll 4 is fed to the passivation layer 1.1. As is shown in step II, the first side surface 4.1 of the adhesive roll 4 is then connected with the passivation layer 1.1. After the adhesive roll 4 has been detached, the passivation layer 1.1 or passivation element 1 is subsequently guided in the X direction via the rolled goods 3.1. On the first side surface 4.1 of the adhesive roll, the passivation element 1 remains adhered.

[0041] Through repetition of these steps I to II, a production substrate 1.1 with gaps is created as shown in step IV, which is continuously rolled up to the right. The system of coordinates shown defines the X and Y directions and relates to all method steps. Even if the Y direction runs at the side, as shown here, progression upwards or downwards is also possible in the sense of the definition.

[0042] The method shown in FIG. 2 can also be conducted simultaneously from both sides of the production substrate 2 with a production substrate 2 coated on both sides.

[0043] The passivation element 1 or passivation layer 1.1 according to FIG. 3 has a layer 1a of the mass which after drying does not have a stable form, but is self-supporting. The passivation element 1 or passivation layer 1.1 according to FIGS. 4 and 5 has a layer 1a of the mass and a cover layer 1b of a material that differs from the mass. Both layers 1a, 1b form a compound. Both layers, 1a, 1b have the same thickness according to FIG. 4, while according to FIG. 5, the layer thicknesses are different. Thus, layer 1a is thicker than the cover layer 1b. According to FIG. 6, the material of the cover layer 1b is a powder or granulate that does not harden and does not react chemically. Since it has been applied to layer 1a before full hardening or chemical reaction of layer 1a, it has at least partially penetrated into layer 1a. The layer 1a and the cover layer 1b form a compound.