EP3337865A1

EP3337865A1 - Method for bonding a retaining body

Info

Publication number: EP3337865A1
Application number: EP16750168.3A
Authority: EP
Inventors: Tanja ALTENWEGNER; Christian Ring
Original assignee: Tesa SE
Current assignee: Tesa SE
Priority date: 2015-08-21
Filing date: 2016-08-10
Publication date: 2018-06-27
Also published as: WO2017032600A1; DE102015215989A1

Abstract

The invention relates to a method for attaching a body (1) having a planar base (2) onto a surface (6) by means of a double-sided self-adhesive adhesive strip (3), comprising the steps: orienting the body (1) and placing an edge (7) of the body (1) on the surface (6), wherein the planar base (2) of the body (1) forms a non-zero angle with the surface (6); tilting the body (1) in the direction of the surface (6), wherein the edge (7) of the body (1) forms a tilting axis, wherein the angle between the planar base (2) of the body (1) and the surface (6) is reduced to zero, wherein as a result of the tilting motion, the planar base (2) of the body (1) is adhesively bonded to the surface (6) via the double-sided, self-adhesive adhesive strip (3); and pressing the body (1) to the adhesive strip (3) and the surface (6).

Description

description

Method for bonding a holding body

The present invention relates to a method for applying a body having a flat base on a surface by means of a double-sided self-adhesive tape.

Adhesive fastenable holding body for mounting objects on walls and other surfaces are known in many designs. In trade, such holding bodies are available, for example, as self-adhesive hooks or adhesive hooks. The double-sided self-adhesive strip may already be glued to the rear side of the holding body by the manufacturer. The user then removes a protective film from the rear wall opposite adhesive surface for attachment and can attach the holding body adhesive. Also known are double-sided adhesive means, which are provided separately to a holding body. In these, the two adhesive major surfaces are each covered by a peelable protective film.

In the trade are also removable, self-adhesive agents that can solve after bonding by stretching stretching in the direction parallel to the wall of the joint between the wall and holding body, known, so that the holding body can be removed without damaging the substrate again from this. Self-adhesive articles of this type are known for example from DE 33 31 016 A1 or DE 42 22 849 C1. Usually, these adhesive strips are glued behind the holding body so that a tangible by hand and non-adhesive equipped area for the stretched Entkleben remains accessible. For gluing the hook, the article should first be glued to a cleaned substrate, such as a tile, and pressed well. Subsequently, the base plate of the hook should be placed above a red line of the article handlebar. This is to ensure that the adhesive surface of the article is completely covered and thus protected from environmental influences. From WO 2008/073724 A1 a method for fixing a zugentklebbaren, double-sided self-adhesive tape on a wall is known. In this case, an adhesive strip is pressed by means of a doctor blade.

From DE 10 029 627 C2, a method for releasably securing an object to a surface is known, wherein the article is fastened by means of two on one side with a pressure-sensitive adhesive coated on one side sheet, and the fabrics on the other side corresponding connecting elements for interlocking Connecting these other sides together.

A challenge in attaching objects to be affixed to a surface by means of a double-sided self-adhesive tape is to provide a sufficient compressive force during bonding which in addition should be effective on the entirety of the pressure-sensitive adhesive major surfaces of the tape. In addition, air pockets between the object and the main surface of the adhesive strip are to be avoided, since these reduce the adhesive surfaces and thus also reduce the gluing result and the maximum load capacity of the adhesive surface.

Experiments have shown that users attach the back side self-adhesive holding body mostly by pressing once with the fingertip of the thumb and a force of 30 N to 80 N on the front of the holder body. The average area of the fingertip of the thumb is between 2 cm ² and 3 cm ² , which results in a pressure between 100 kPa and 400 kPa, based on the contact area between the holding body and the fingertip of the thumb. This means in practice that the contact pressure exerted only once distributed in a first approximation to the surface of the located between the surface and the holding body adhesive strip. If a low pressure force of only 30 N is assumed, this results in an adhesive strip with an area of 10 cm ^2, a pressure of 30 kPa. At such a low pressure, a reliable wetting of the substrate by the adhesive of the adhesive strip, especially on rough surfaces, can no longer be ensured in every case. In genus typical holding devices insufficient wetting of the substrate by the adhesive of the adhesive strip, especially in the local area in and above the load-introducing structure is critical. There tensile stresses act, which favor a peeling of the pressure-sensitive adhesive from the surface, which can lead to failure of the holding device and an object held it undesirably falls to the ground. Especially In the upper region of the holding body, it is important that the pressure-sensitive adhesive surfaces of the double-sided adhesive strip are in contact, as completely as possible, with the surface and, on the other hand, with the rear surface of the holding body.

The object of the invention is to achieve a maximum contact surface between the joining surfaces on the wall, the holding body and the adhesive strip and thus the best possible adhesive result.

The object is achieved by a method according to independent claim 1.

By means of the joining process according to the invention, in which the body is attached to the surface with an edge and then fixed by a tilting movement, a high contact force is achieved during the joining process and the risk of air inclusions, which can impair the adhesive result, is reduced, as explained in more detail below becomes. The appended edge of the body is aligned relative to the surface and pressed, for example, in the direction of a normal to the surface. The pressure force applied by a user during application is between 30 N and 80 N. The pressure on the adhesive surface results from a quotient of pressure force and pressure surface. By placing the edge or the edge region of the body, the pressure surface is reduced compared to a flat pressing by a multiple. This results in a significantly higher pressure in the area with high tensile load and simultaneous shear stress. The holding body is finally tilted with a tilting movement on the double-sided self-adhesive tape and pressed. As a result, an air entrapment bonding is achieved compared to a flat touchdown. Due to the tilting movement, the air, directed by the tilting gap, is displaced from the attachment edge in the opposite direction.

In one embodiment of the invention, the double-sided self-adhesive strip is glued to a preferably vertical component surface, in particular a wall. In an alternative embodiment, the adhesive strip may first be adhered to the flat base of the body to be bonded. Alternatively, the adhesive strip can also be previously glued, so for example, manufacturer side, on the flat base of the body to be bonded. Preferably, the edge to be applied to the surface is about the edge which lies on the edge region of the adhesive region opposite the main load direction. In the case of a vertical force direction, ie when the main load direction is determined by gravity, this is advantageously the upper edge of the body. The main load direction thus results after attaching the body to the surface by how the user wishes to use the holding body to hold objects. Due to the higher contact pressure in the particularly stressed area, a particularly good and lasting gluing result is achieved. In general, however, it may be any edge of the body in any orientation.

Preferably, the adhesive strip is first glued to the surface, which has a higher surface roughness and pressed firmly on this surface. The human's thumb-berry has the favorable combination of relatively high pressure transmission and flexibility at the same time for bonding. By this property small bumps can be overcome and so a maximum bonding surface can be achieved. As a rule, the surface, for example a wall, has a higher surface roughness than the flat base surface of the body to be bonded.

As an alternative to a pure tilting movement, a rolling tilting movement can be carried out. For this purpose, the preferably rigid or substantially rigid body is slightly deformable by an applied force and is then unrolled along the adhesive strip from the attached edge towards an opposite edge of the body.

The rolling tilting movement leads to a slight deflection of the holding body, which entails a uniform displacement of the air.

Test results prove an improvement of the adhesive bond in a bonding method according to the invention over a surface bonding. In addition, tests have shown that in a method according to the invention it is easier for the user to cover the flat base of the body with the adhesive strip.

Due to the preferred deflection of the edge region of the body, which first comes into contact with the wall, form a largely flat contact surface, wherein between the remaining body and the wall, an air gap remains. This favors the one the adhesive result in the edge region, and also ensures that in the subsequent unrolling the air is safely displaced from the gap between the body and the wall.

Preferably, the body is formed as an adhesive hook and is rolled from its upper edge or edge surface to its lower edge or edge surface on a wall.

Advantageously, the length of the edge to be attached by the tilt axis of the body is at least 5 mm, because the position of the body when tilting around the edge as a tilting axis can no longer be controlled cleanly when the edge is too short. Particularly advantageously, the length of the applied edge of the body in the range between 15 mm and 30 mm. For the same reason, the ratio of the bond length in the direction of force to the length of the edge of the body to be attached is preferably at most eight, more preferably at most five.

Preferably, the adhesive strip has an adhesive-free area as a handle, wherein stretched by pulling the handle of the adhesive strip parallel to the bond plane and thereby the adhesive bond can be solved again without great effort and in particular without tools.

According to a first embodiment, the invention relates to a method for applying a body 1 with a flat base 2 on a surface 6 by means of a double-sided self-adhesive tape 3, comprising the following steps:

- Aligning the body 1 and placing an edge 7 of the body 1 to the surface 6, wherein the flat base 2 of the body 1 with the surface 6 includes a non-zero angle;

Tilting of the body 1 in the direction of the surface 6, wherein the edge 7 of the body 1 forms a tilting axis, the angle between the planar base 2 of the body 1 and the surface 6 being reduced to zero, the plane base 2 being due to the tilting movement the body 1 is adhesively bonded to the surface 6 via the double-sided self-adhesive tape 3;

- Pressing of the body 1 to the adhesive strip 3 and the surface of the sixth According to a second embodiment, the invention relates to a method according to the first embodiment, characterized in that before the alignment of the body 1 of the adhesive strip 3 is glued to the surface 6 on one side.

According to a third embodiment, the invention relates to a method according to the first embodiment, characterized in that before the alignment of the body 1 of the adhesive strip 3 is glued to the base 2 of the body 1 on one side.

According to a fourth embodiment, the invention relates to a method according to the first embodiment, characterized in that a body 1 with a manufacturer on the base 2 of the body 1 glued on one side adhesive strip 3 is used.

According to a fifth embodiment, the invention relates to a method according to one of the preceding embodiments, characterized in that the edge 7 to be applied to the surface 6 is located at the end of the body 1 opposite the main load direction.

According to a sixth embodiment, the invention relates to a method according to one of the preceding embodiments, wherein the double-sided self-adhesive strip 3 is applied depending on the surface roughness only on the joining surface on the surface 6 and the flat base 2 of the body 1, which has the greater surface roughness ,

According to a seventh embodiment, the invention relates to a method according to one of the preceding embodiments, wherein the tilting of the body 1 from the edge 7 takes place by means of a rolling tilting movement along the adhesive strip 3.

According to an eighth embodiment, the invention relates to a method according to one of the preceding embodiments, wherein the base 2 of the body 1 is rigid or substantially rigid.

According to a ninth embodiment, the invention relates to a method according to one of the preceding embodiments using at least one self-adhesive strip 3 with a handle 16, wherein the adhesive strip 3 by pulling on the Handle 16 can be stretched parallel to the bond plane and thereby solves the adhesive bond.

The invention will be explained below with reference to preferred embodiments with reference to the accompanying figures and embodiments. It shows

Figure 1 is a surface on which a body is bonded by a method according to the invention.

2 shows a flow chart with the individual method steps of a method according to the invention;

3 shows an alternative flowchart with the individual method steps of a method according to the invention;

4 shows an alternative flowchart with the individual method steps of a method according to the invention;

5 is a holding device, which according to the inventive method on a

Surface can be attached;

Fig. 6 is a flow chart for attaching the holding device of FIG. 5;

Fig. 7 is a diagram of a load test for a plastic hook;

8 is another diagram of a load test for a plastic hook with respect to FIG 6 changed position of the load application.

9 shows a surface on which a body is glued with a rolling tilting movement by a method according to the invention;

10 shows a rear view of the body from FIG. 9, the arrows illustrating the air movement during the rolling tilting movement; 1 shows an alternative flowchart with the individual method steps of a method according to the invention with a rolling tilting movement;

FIG. 12 shows a test set-up for a tipping shearing test on a holding body on a rough fiber tread; FIG.

Fig. 13, 14 test results for Kippschertests with the experimental setup of Figure 12;

FIG. 15 shows a test setup for a tipping shears test on a holding body on a tile; FIG.

Fig. 16 test results for Kippschertests with the experimental setup of Figure 15 and

17 shows a comparison of the holding times as a function of the bonding process.

In Fig. 1, a surface 6 is shown, on which a body l with a flat base 2, in particular a flat back, by means of a double-sided self-adhesive tape 3 can be fastened. The adhesive strip 3 has two opposing adhesive-tacky main surfaces 4, 5, wherein the first pressure-sensitive adhesive surface 4 faces the surface 6 and the second pressure-sensitive adhesive surface 5 faces the flat base surface 2 of the body 1. For protection purposes, the two pressure-sensitive adhesive main surfaces 4, 5 are each protected by protective films, not shown, which are removed before assembly.

By placing one of the main load direction of the intended adhesive region opposite edge portion 7 of the body 1 on a corresponding edge portion 8 of the adhesive strip 3 and then tilting of the body 1 in the direction of the surface 1, the air between the flat back 2 of the body and the second pressure-sensitive adhesive main surface 5 pressed out of the gap during tilting and thus an air entrapment, which can degrade the gluing result, reduced.

FIG. 2 shows a flow chart for a method according to the invention. In a first method step <10>, the surface 6 to which the body 1 is to be fastened and, if necessary, the base 2 of the body 1 are cleaned. In a subsequent, second method step <20>, the protective film is peeled off from the first pressure-sensitive adhesive surface 4 of the adhesive strip 3. In a further method step <30>, this first pressure-sensitive adhesive surface 4 of the adhesive strip 3 is glued to the surface 6. In a subsequent process step <40>, the protective film is peeled off from the second pressure-sensitive adhesive surface 5 of the adhesive strip 3. In a further method step <50>, the body 1 is aligned with the adhesive strip 3 and one of the main load direction of the intended adhesive region opposite edge region 7 of the body 1 is placed on a corresponding edge region 8 of the second pressure-sensitive adhesive main surface 5 of the adhesive strip 3, wherein the flat base 2 of Body 1 with the surface 6 includes a non-zero angle of preferably at least 1 °, more preferably at least 5 °, even more preferably at least 10 °, more preferably at least 20 °. Preferably, an upper edge region 7 of the body is aligned with an upper edge region 8 of the second pressure-sensitive adhesive surface 5 of the adhesive strip 3 and placed thereon. In a further method step <60>, the body 1 is tilted in the direction of the second pressure-sensitive adhesive main surface 5, that is to say in the direction of the surface 6, the contact point forming a tilting axis on the edge region 8 of the second pressure-sensitive adhesive main surface 5 and the edge region 7 of the body 1 , wherein the angle between the body 1 and the second pressure-sensitive adhesive main surface 5 or between the body 1 and the surface 6 is reduced to 0 °, wherein due to the tilting movement, the flat base 2 of the body 1 via the double-sided self-adhesive tape 3 with the surface 6 is adhesively bonded flat. In a final method step <70>, the body 1 is pressed onto the second pressure-sensitive adhesive main surface 5 of the adhesive strip 3.

FIG. 3 shows a flow chart for an alternative method according to the invention. In a first method step <1 10>, the surface 6 to which the body 1 is to be fastened and, if necessary, the base 2 of the body 1 are cleaned. In a subsequent, second method step <120>, the protective film is peeled off from the second pressure-sensitive adhesive surface 5 of the adhesive strip 3. In a further method step <130>, this second pressure-sensitive adhesive surface 5 of the adhesive strip 3 is adhesively bonded to the flat base surface 2 of the body 1. In a further method step <140>, the protective film is peeled off from the first pressure-sensitive adhesive side 4 of the adhesive strip 3. In a further method step <150>, the body 1 becomes the surface 6 aligned and the edge region 7 of the body 1 and the glued to the body adhesive strip 3 on the surface 6, wherein the flat base 2 of the body 1 with the surface 6 a non-zero angle of preferably at least 1 °, more preferably at least 5 °, more preferably at least 10 °, more preferably at least 20 °. In a further method step 160, the body 1 is tilted in the direction of the surface 6, the contact point forming a tilting axis at the edge region 7 of the body 1, and the angle between the body 1 and the surface 6 being reduced to 0 °, wherein as a result of the tilting movement, the flat base 2 of the body 1 is adhesively bonded to the surface 6 via the double-sided self-adhesive strip 3. In a final method step <170>, the body 1 is pressed onto the surface 6.

As an alternative to FIG. 3, the adhesive strip 3 may also be applied to the base 2 of the body 1 beforehand, ie, for example, on the manufacturer side, thereby eliminating the steps 120 and 130 at the user.

FIG. 4 shows a further flow diagram of a method according to the invention. In a first method step <210>, the surface 6 to which the body 1 is to be fastened and, if necessary, the base 2 of the body 1 are cleaned. In a further method step <215>, the surface roughness of the surface 6 is compared with the surface roughness of the planar base 2 of the body 1. Subsequently, in a process step <220>, the protective film is peeled off at the pressure-sensitive adhesive main surface 4, 5, which faces the surface 2, 6 with the higher surface roughness. In a next method step <230>, the selected pressure-sensitive adhesive main surface 4, 5 of the adhesive strip 3 is bonded to the surface 2, 6, which has the greater surface roughness. In a following method step <240>, the protective film is peeled off on the opposite main surface 4, 5. In a further method step <250>, the body 1 is placed with its edge region 7 on the surface 6, wherein between the flat base 2 of the body 1 and the surface 6 a non-zero angle of preferably at least 1 °, more preferably at least 5 ° , even more preferably at least 10 °, more preferably at least 20 ° is included. In a further method step <260>, the body 1 is tilted in the direction of the surface 6, wherein the edge region 7 of the body 1 forms a tilting axis, and wherein the angle between the planar base 2 of the body 1 and the surface 6 is reduced to 0 °. In a final process step <270>, the body 1 is pressed onto the surface 6.

In the method according to FIGS. 2 to 4, an optional process step, not shown, may be provided after step 10 or 1 10 or 210, namely a pretreatment of the surface 6. For stabilization of the gel layer, for example on tiles or glass a bonding agent are used. To reduce larger roughness, for example, when very coarse plaster or as corrosion protection for metals, a primer can be used. For the definition of the terms adhesion promoter and primer reference is made to Gerd Habenicht, "gluing", Springer Verlag, 2nd edition 1990.

In Fig. 5, a holding device 9 is shown with a body 1 and a double-sided self-adhesive tape 3, which can be attached to a surface 6 by the method according to the invention. The body 1 has three contact surfaces 1 1, 12, 13, via which the body 1 can be pressed after performing a method according to the invention to the surface 6 in order to increase the surface pressure on the adhesive strip 3 and thus the adhesive result again. The body 1 further comprises a support element 14, on which an object can be suspended on the body 1.

The adhesive strip 3 advantageously has an adhesive-free area as a grip 16, which in the use state of the body, i. when attached to the component surface, sufficient under the body, i. preferably by at least 10 mm, protrudes so that it can be grasped with two fingers. By pulling on the handle 16 of the adhesive strip 3 is stretched parallel to the bond plane, whereby the adhesive bond can be solved without much effort and in particular without tools again. The grip 16 is preferably arranged at the edge 15 of the body 1 which is opposite the attachment edge 7, but may for example also be advantageously arranged on the edge 7 or one of the other edges of the body 1.

FIG. 6 shows an assembly process of the holding device 9 according to a method according to the invention. In this case, the adhesive strip 3 is adhered to a surface 6, the body 1 is placed with its upper edge region 7 on the adhesive strip 3 and then tilted in the direction of the surface 6. In this case, the body 1 may be slightly flexible, so that it slightly bends during the tilting operation and unrolls with the base 2 on the pressure-sensitive adhesive main surface 5 or the surface 6. there Initially, the bonding begins with a small pressing surface and a high area-related pressing force on the upper edge region 7, whereby a particularly good bonding is achieved here above the support element 14 in the region of high tensile stress. During the rolling process, the contact surface increases continuously and the surface-related contact force continuously decreases. Furthermore, the lower edge of the contact surface migrates downwards, starting from the upper edge region 7, whereby possibly existing air inclusions are pressed out between the contact surfaces. Finally, the body 1 is pressed over the pressure surfaces 1 1, 12, 13, wherein first with the finger berries of two fingers, in particular with the two thumb berries, each one of the upper pressure surfaces 1 1, 12 are pressed, and finally with the two finger berries the larger pressure surface 13 is pressed.

In FIG. 7 and FIG. 8, the voltage curves acting on the adhesive strip 3 are shown by the height of, for example, a 76 mm long hook body 1 with different positions of the support element 14. The curve with a larger maximum amplitude is in each case the peel stress σ; Compressive stresses are here provided with a negative sign and tensile stresses with a positive sign. The curve with a smaller maximum amplitude is the shear stress τ, the point of the load introduction being marked with an arrow. On the abscissa of the two diagrams, the vertical coordinate (generally the coordinate of the main load direction) z is plotted in mm. In this case, z = 0 mm denotes the underside of the hook, z = 76 mm the hook top and z = 38 mm the hook center. On the ordinate, the stresses σ, τ are plotted in MPa. The load introduction takes place near the upper edge 7 of the body 1. The highest tensile stresses are present in the region of the support element 14 or between the support element 14 and the upper edge region 7 of the body 1.

As can be seen from a comparison of FIGS. 7 and 8, shifting the position of the load introduction in the direction of the upper edge region 7 of the body 1, that is to say in the illustration above, not only shifts the location of the highest tensile load, but also increases The method according to the invention is therefore particularly suitable for those bodies 1 in which the load entry takes place near the upper edge region 7 of the body 1, since the bonding thereby occurs, in particular in the region between the support element 14 and the upper edge region 7 of the body 1 is improved. In Fig. 8 is a voltage waveform for comparison a body 1 with a height of a body center of the body 1 arranged support member 14 is shown.

In Fig. 9, the surface 6 of a wall is shown, on which a body 1 is glued with a rolling tilting movement. For this purpose, the adhesive strip 3 is first glued to the surface 6. In this case, the adhesive strip has two opposing adhesive-tacky main surfaces 4, 5, the first pressure-sensitive adhesive surface 4 facing the surface 6 and the second pressure-sensitive adhesive surface 5 facing the base surface 2 of the body 1. The body 1 is bent before gluing along its longitudinal direction, so that a sickle shape of the body 1 results. By placing one of the main load direction of the intended adhesive region opposite edge portion 7 of the body 1 on a corresponding edge portion 8 of the adhesive strip 3 and then tilting of the body 1 in the direction of the surface 1, the air between the flat back 2 of the body and the second pressure-sensitive adhesive main surface 5 pressed out of the gap during tilting and thus an air entrapment, which can degrade the adhesive result, reduced. At the same time, the force required for the bending of the body 1 is reduced so that the back surface 2 of the body 1 is deformed back into a flat surface starting from the sickle shape. By this "rolling tipping" the force at the upper edge portion 7 of the body 1 can be initiated largely in the normal direction to the wall 6 in the adhesive strip 3 and by rolling the air in the gap 17 between the body 1 and the adhesive strip 3 is displaced even more effective In Fig. 10, the pushing out of the air from the gap 17 along the back surface 2 of the body 1 is shown again, the arrows symbolizing the displacement direction of the air.

In Fig. 1 1, a further flow diagram of a method according to the invention is shown. In a first method step <310>, the surface 6 to which the body 1 is to be attached and, if necessary, the base 2 of the body 1 are cleaned. In a subsequent, second method step <320>, the protective film is peeled off from the first pressure-sensitive adhesive surface 4 of the adhesive strip 3. In a further method step <330>, this first pressure-sensitive adhesive surface 4 of the adhesive strip 3 is glued to the surface 6. In a subsequent method step <340>, the protective film is peeled off from the second pressure-sensitive adhesive surface 5 of the adhesive strip 3. The body 1 then becomes the adhesive strip 3 in a further method step <350> aligned and one of the main load direction of the intended adhesive region opposite edge region 7 of the body 1 at a corresponding edge portion 8 of the second pressure-sensitive adhesive main surface 5 of the adhesive strip 3, wherein the base 2 of the body 1 with the surface 6 a non-zero angle of preferably at least 1 ° , more preferably at least 5 °, even more preferably at least 10 °, more preferably at least 20 °. Preferably, an upper edge region 7 of the body is aligned with an upper edge region 8 of the second pressure-sensitive adhesive surface 5 of the adhesive strip 3 and placed thereon. In a further method step <355>, the body 1 is deflected elastically in the longitudinal direction by a force, so that a slight crescent shape of the back surface 2 of the body 1 results. In a further method step <360>, the body 1 is tilted in the direction of the second pressure-sensitive adhesive main surface 5, that is to say in the direction of the surface 6, the contact point forming a tilting axis on the edge region 8 of the second pressure-sensitive adhesive main surface 5 and the edge region 7 of the body 1 , Simultaneously with the tilting of the body 1 is rolled along the curved base 2, whereby due to the rolling / tilting movement of the angle between the body 1 and the second pressure-sensitive adhesive main surface 5 and between the body 1 and the surface 6 is reduced to 0 ° and the flat base 2 of the body 1 is adhesively bonded to the surface 6 via the double-sided self-adhesive strip 3. In this case, the force which causes the elastic deflection of the body 1 is reduced until the body 1 again has a flat rear surface 2 at the end of the rolling / tilting movement. In a final method step <370>, the body 1 is pressed onto the second pressure-sensitive adhesive main surface 5 of the adhesive strip 3.

The described rolling / tilting movement of the body 1 can also be used in the method according to one of the figures 3 or 4.

Finally, test results of Kippschertests

shown on a holding body on a rough surface and on a smooth surface with reference to the figures 12 to 16. The rough surface is rough wood wallpaper of the type "Rauhfaser Classico" of the company Erfurt & Sohn KG, on which with a lambskin roller the color "Alpinaweiß" of the company DAW SE was applied, and with the smooth underground is a tile the company Villeroy & Boch with the article number 1 106TW02. Figure 12 shows a test setup for Kippschertests on a holding body on a relatively rough test base 6, namely woodchip wallpaper.

First, a plurality of adhesive strips 3 are bonded to the test substrate 6. Subsequently, test bodies 1 are attached to the test substrate 6 via the adhesive strips 3, on the one hand by means of the method according to the invention, the body 1 being applied here at its upper edge, on the other hand by means of a comparison method in which the body 1 is aligned approximately parallel to the surface 6 and the entire surface of the body 1 is simultaneously pressed on the adhesive strip 3 fixed to the surface 6, whereafter the adhesive strip 3 is uniformly pressed.

On the support member 14 of each test piece 1, a test weight 80 in the manner shown in Figure 12 is attached via a cord 81 at a distance a of 10 mm from the test bed 6. The cord 81 is guided from the support member 14 at an angle of 8 ° to the vertical forward, for example, by a suitable distance below the support member 14 arranged spacers 82 of suitable length.

For all tests carried out, a number of samples of five and a test period of 25 days were provided.

Experimental results for the experimental set-up according to FIG. 12 are shown in FIG. 13 for an adhesive strip 13 of a first type with a bond length of 41 mm and in FIG. 14 for a bond strip 13 of the same type with a bond length of 60 mm and therefore with a higher holding performance. In both diagrams, the average hold time (ie, averaged over the five samples) is given in days [d], ie the time in days until the support body 1 detached from the test bed 6 under the action of the weight 80. The respective left, darker bars belong to holding bodies 1, which were applied by means of the method according to the invention, which respectively belong to the right, brighter bars to holding bodies 1, which were applied by means of the comparison method. In Figure 13, the five experiments shown were performed from left to right with the following parameters: G = 1.5 kg, room temperature; G = 2.5 kg, room temperature; G = 1 kg, 35 ° C; G = 2 kg, 35 ° C; G = 1.5 kg, 35 ° C. In Figure 14, the two experiments shown were performed from left to right with the following parameters: G = 3 kg, room temperature; G = 2 kg, 35 ° C. As can be seen from FIGS. 13 and 14, in each of the tests by the adhesive bonding technique according to the invention, an at least equal or significantly better, in one case even a 60% better result in the holding time could be achieved.

FIG. 15 shows a test setup for a tipping shears test on a holding body on a smooth test bed 6, namely a tile. The experimental preparation was carried out in the same manner as described with reference to FIG. On the support member 14 of each test piece 1, a test weight 80 was attached in the manner shown in Figure 15 via a string 81 at a distance a (lever arm length) of 50 mm from the test bed 6, but in this test setup without angle to the vertical. For all tests carried out, a sample count of five and a test duration of 25 days were again provided.

In Figure 16, the four experiments shown were performed with the experimental set-up of Figure 15 for an adhesive strip of another type having a bond length of 38 mm and left-to-right parameters: G = 6 kg, room temperature; G = 5 kg, room temperature; G = 4 kg, 35 ° C; G = 3 kg, 35 ° C. Here in each of the experiments could be achieved by the sticking technique of the invention a significantly better, in one case even a 66% better result in the holding time.

As a result of the experiments according to FIGS. 12 to 16, it can be stated that with the aid of the sticking technique according to the invention, the holding time on average could be significantly prolonged. In the experimental preparation, it was also noticeable that the method according to the invention made possible simple positioning and exact bonding, whereas the conventional comparison method made possible an intuitive handling, but positioning with respect to the adhesive strip was considerably more difficult.

tape:

The following describes the composition and the preparation of an adhesive according to the invention.

Used raw materials:

Adhesives raw materials type manufacturer Elastomer Kraton D1 102 AS Polystyrene-polybutadiene Kraton Polymers

block copolymer

Adhesive resin Dercolyte A1 15 α-pinene resin DRT

Soft resin Wingtack 10 C5 resin Cray Valley

Anti-Aging with Irganox 1010 Sterically hindered BASF tel Phenol

(Manufacturer's information Sekisui Alveo AG)

Adhesive 1

The adhesive was prepared in a heatable double sigma kneader from Aachener Maschinenbau Küpper Type III-P1. The jacket of the kneader was heated by a thermal oil heating bath from Lauda. Here, a bath temperature of 190 ° C was set. During the entire kneading process, a C02 protective gas atmosphere was present. The kneader was operated at 50 rpm. First, the elastomer was weighed together with the solid aging inhibitor Irganox 1010 and presented in the kneader. Thereafter, about 10% of the amount of solid resin was added and kneaded for 15 minutes. Subsequently, each one third of the remaining amount of adhesive resin and finally soft resin was added and incorporated at intervals of 10 minutes.

After completion of the kneading process, the kneading material was removed from the kneader and allowed to cool to room temperature.

The cooled mass was positioned between two layers of siliconized release paper and pressed using a hot press from Lauffer GmbH & Co. KG Type RLKV 25 at 130 ° C to give handsheets with a layer thickness of 150 μηη or 750 μηη (depending on the test to be carried out).

Production of the adhesive products

The foam carrier and the adhesive (in 150 μηη thickness) are cut to a handy size and laminated with a pressure roller by hand directly to each other. It is important to ensure that the machine direction of the foam matches the machine direction of the adhesive. Thereafter, the samples are 2 weeks at 23 ° C and 50% rel. Humidity stored to ensure a good anchorage of the adhesive layers on the foam carrier. Strips are punched in 20 mm width across the machine direction (cross-direction).

With the adhesive strips produced in this way, Kippschertests according to the test set-up according to FIG. 12 were carried out on a holding body on a relatively rough test substrate 6, namely woodchip wallpaper, in the following.

Before bonding, the adhesive strips were stored at 40 ° C. for three months (aging test) and then conditioned at 23 ° C. for 24 hours. In the left-hand beam, the adhesive strip 3 was first glued to the test substrate 6. Subsequently, test bodies 1 are attached via the adhesive strips 3 to the test substrate 6, by means of the method according to the invention, the body 1 being attached here at its upper edge. In the right-hand beam, the adhesive tape 3 was first adhered to the test piece 1. Subsequently, test bodies 1 are fastened with the adhesive strip 3 to the test substrate 6, by means of the method according to the invention, the body 1 being attached here at its upper edge.

On the support member 14 of each test piece 1, a test weight 80 in the manner shown in Figure 12 is attached via a cord 81 at a distance a of 10 mm from the test bed 6. The cord 81 is guided from the support member 14 at an angle of 8 ° to the vertical forward, for example, by a suitable distance below the support member 14 arranged spacers 82 of suitable length. For these tests, a number of samples of three and a test duration of 26 days were provided.

The test results for the experimental setup according to FIG. 12 are shown in FIG. 17 for an adhesive strip having a bond length of 41 mm. The average hold time (i.e., averaged over the three samples) in days [d] is indicated, i. the time in days until the support body 1 detached from the test bed 6 under the action of the weight 80. In FIG. 17, the experiments shown were carried out from left to right with the following parameters: G = 1.5 kg, room temperature, adhesive tape 1, first glued to woodchip; G = 1, 5 kg, room temperature, adhesive tape 1, first glued on the hook.

As a result of the experiments according to FIG. 17, it can be stated that with the aid of the adhesive technique according to the invention, in which the adhesive tape was first adhered to the rougher surface, the holding time on average could be significantly increased.

Claims

Expectations

Method for attaching a body (1) with a flat base (2) to a surface (6) by means of a double-sided self-adhesive adhesive strip (3), comprising the following steps:

- Aligning the body (1) and placing an edge (7) of the body (1) on the surface (6), the flat base surface (2) of the body (1) forming an angle other than zero with the surface (6). ;

- Tilting the body (1) in the direction of the surface (6), the edge (7) of the body (1) forming a tilting axis, the angle between the flat base surface (2) of the body (1) and the surface (6 ) is reduced to zero, with the flat base surface (2) of the body (1) being adhesively connected to the surface (6) via the double-sided self-adhesive adhesive strip (3) as a result of the tilting movement;

- Pressing the body (1) onto the adhesive strip (3) and the surface (6), the edge (7) to be attached to the surface (6) being on the surface (6) after the body (1) has been attached. trained main load direction opposite end of the body (1).

- Tilting the body (1) in the direction of the surface (6), the edge (7) of the body (1) forming a tilting axis, the angle between the flat base surface (2) of the body (1) and the surface (6 ) is reduced to zero, with the flat base surface due to the tilting movement

(2) the body (1) is adhesively connected to the surface (6) via the double-sided self-adhesive adhesive strip (3);

- Pressing the body (1) onto the adhesive strip (3) and the surface (6), with the double-sided self-adhesive adhesive strip (3) depending on the surface roughness first being applied to the joining surface on the surface (6) and the flat Base surface 2 of the body (1) is applied, which has the greater surface roughness.

3. The method according to claim 1 or 2, characterized in that before aligning the body (1), the adhesive strip (3) is stuck on one side of the surface (6).

4. The method according to claim 1 or 2, characterized in that before aligning the body (1), the adhesive strip (3) is glued on one side to the base surface (2) of the body (1).

5. The method according to claim 1 or 2, characterized in that a body (1) with an adhesive strip (3) previously glued on one side to the base surface (2) of the body (1) is used.

6. The method according to claim 2, characterized in that the edge (7) to be attached to the surface (6) lies at the end of the body (1) opposite the main load direction.

7. The method according to claim 1, wherein the double-sided self-adhesive adhesive strip (3), depending on the surface roughness, is only applied to the joining surface on the surface (6) and the flat base surface 2 of the body (1), which has the greater surface roughness.

8. The method according to any one of the preceding claims, wherein the body (1) is tilted from the edge (7) by means of a rolling tilting movement along the adhesive strip (3).

9. The method according to any one of claims 1 to 7, wherein the base surface (2) of the body (1) is rigid.

10. The method according to one of the preceding claims using at least one self-adhesive adhesive strip (3) with a handle (16), wherein the adhesive strip (3) can be stretched parallel to the bonding plane by pulling on the handle (16) and thereby the adhesive bond solves.