US 11,939,500 B2
Diecut especially for permanently closing holes
Katja Meyer, Hamburg (DE); Tim Baumann, Hamburg (DE); and Christoph Nagel, Hamburg (DE)
Assigned to tesa SE, Norderstedt (DE)
Filed by tesa SE, Norderstedt (DE)
Filed on Sep. 28, 2021, as Appl. No. 17/449,177.
Claims priority of application No. 10 2020 212 530.9 (DE), filed on Oct. 5, 2020.
Prior Publication US 2022/0105708 A1, Apr. 7, 2022
Int. Cl. C09J 7/29 (2018.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 9/04 (2006.01); B32B 15/14 (2006.01); B32B 15/20 (2006.01); C09J 7/38 (2018.01)
CPC C09J 7/29 (2018.01) [B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 7/12 (2013.01); B32B 9/04 (2013.01); B32B 15/14 (2013.01); B32B 15/20 (2013.01); C09J 7/385 (2018.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/101 (2013.01); B32B 2307/718 (2013.01); B32B 2307/732 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A diecut adapted for closing holes in one or more metal sheets and/or one or more plastics parts, the diecut comprising:
a carrier composed of a laminate assembly comprising a layer sequence having:
at least one first layer formed by a metallic layer having a thickness of 10 to 40 μm;
at least one second layer formed by a woven glass fabric or laid glass fabric having a basis weight of 30 to 200 g/m2;
at least one third layer formed by a first pressure-sensitive adhesive having a basis weight of 70 to 200 g/m2;
at least one fourth layer formed by an unexpanded expandable graphite having a thickness of 0.2 to 3.0 mm, wherein expandable graphite is produced from naturally occurring mineral graphite and present in the at least one fourth layer to an extent of at least 80 wt % and an expansion rate of the expandable graphite is 30 to 400 cm3/g; and
at least one fifth layer formed by a second, acrylate-based pressure-sensitive adhesive having a basis weight of 300 to 1800 g/m2 and/or a thickness of 400 to 1800 μm.