Multi-layer multi-functional tape

Abstract

In a multi-layered multifunctional tape, two layers of PU foam enclose one layer of EPDM foam.

Description

[0001] The invention relates to a multi-layer multifunctional tape.

[0002] Multi-layer sealing tapes are available in a vast variety for a wide range of applications. They can be designed to be permeable or diffusion-resistant, for example. The choice of materials is also diverse, including foam plastics, PE films, and similar materials.

[0003] The multifunctional tapes in question are regularly used to seal against air and driving rain, for example in building connection joints or to insulate window movement joints.

[0004] The aspect of sound insulation, which is particularly important for construction joints between a window frame and a window reveal, is often given little consideration.

[0005] Against this background, the invention aims to provide a multi-layer multifunctional tape with improved properties.

[0006] This technical problem is solved according to claim 1 by a multifunctional tape that encloses two layers of a PU foam, a polyurethane foam, and one layer of an EPDM foam, an ethylene propylene diene rubber foam.

[0007] The multi-layer, multifunctional tape according to the invention is highly flexible and extremely airtight and resistant to driving rain. The use of EPDM foam, which has excellent acoustic insulation properties, also achieves very good sound insulation. Furthermore, this material is waterproof.

[0008] The EPDM foam should have a density between 85 kg / m 3 and 115 kg / m 3 have a tensile strength of more than 100 kPa and an elongation at break of more than 150%.

[0009] In combination with similar specifications of the PU foam, such a material composite is extremely airtight and resistant to heavy rain.

[0010] Accordingly, the PU foam should have a density between 85 kg / m 3 and 115 kg / m 3 with a tensile strength of more than 100 kPa.

[0011] In addition, the PU foam should have an elongation at break of more than 150%, preferably significantly higher, e.g., 190%. This ensures that the outer layer of the PU foam is not overstressed when the multifunctional tape is rolled up.

[0012] Even though EPDM foam is waterproof, PU foam should also be protected from heavy rain, for example by impregnating it with an aerogel or a silicone-based waterproofing agent.

[0013] The simple structure of the multifunctional band according to the invention is shown in the only Fig. 1.

[0014] Two outer layers 1, 2 of PU foam enclose, for example, a symmetrical middle layer 3 of EPDM foam. Layers 1 to 3 are bonded together by adhesive layers 4, 5, e.g., with a spray adhesive.

[0015] For illustration purposes, the respective thickness of the adhesive layers 4.5 is significantly exaggerated.

Claims

[1] Multi-layer multifunctional tape, characterized by that two layers of PU foam enclose a layer of EPDM foam. [2] Multifunctional band according to claim 1, characterized by that the EPDM foam has a density between 85 kg / m 3 and 115 kg / m 3 has. [3] Multifunctional band according to one or more of the preceding claims, characterized by that the EPDM foam has a tensile strength of more than 100 kPa. [4] Multifunctional band according to one or more of the preceding claims, characterized by that the EPDM foam has an elongation at break of more than 150%. [5] Multifunctional band according to one or more of the preceding claims, characterized by that the PU foam has a density between 85 kg / m 3 and 115 kg / m 3 has. [6] Multifunctional band according to one or more of the preceding claims, characterized bythat the PU foam has a tensile strength of more than 90 kPa. [7] Multifunctional band according to one or more of the preceding claims, characterized by that the PU foam has an elongation at break of more than 150%. [8] Multifunctional band according to one or more of the preceding claims, characterized by that the PU foam is impregnated with an aerogel or a silicone-containing hydrophobic agent.

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