Friction film

1 . A friction film configured to increase friction between two workpieces when compressed between the two workpieces,

wherein the friction film includes a deformable foamed polymer film having a porosity of 50% to 95% as a carrier material and friction-increasing particles on at least one side of the friction film,

wherein zinc particles are provided on the carrier material, and

wherein particles of a first set of the zinc particles maintain a separation between pairs of the friction-increasing particles.

2 . The friction film according to claim 1 , wherein the foamed polymer film comprises polypropylene or polyether sulfone.

3 . The friction film according to claim 1 , wherein the carrier material is coated with an adhesive on both sides, and wherein the friction-increasing particles are applied to only one side of the carrier material.

4 . The friction film according to claim 1 , wherein the carrier material is coated with an adhesive on both sides, and wherein the friction-increasing particles are applied on both sides of the carrier material.

5 . The friction film according to claim 1 , wherein the friction-increasing particles are embedded in the carrier material.

6 . The friction film according to claim 1 , wherein the carrier material has a thickness of 20 μm to 100 μm.

7 . The friction film according to claim 6 , wherein the friction-increasing particles are applied to only one side of the carrier material.

8 . The friction film according to claim 1 , wherein the friction-increasing particles include titanium boride particles and/or diamond particles.

9 . The friction film according to claim 1 ,

wherein the friction-increasing particles are attached to the carrier material by an adhesive.

10 . The friction film according to claim 1 ,

wherein the foamed polymer film is a foamed polyethylene film.

11 . The friction film according claim 1 , wherein the carrier material has a thickness of 25 μm to 50 μm.

12 . The friction film according claim 1 , wherein the carrier material has a thickness of 15 μm to 50 μm.

13 . A system comprising

a first workpiece;

a second workpiece; and

a friction film between the first workpiece and the second workpiece,

wherein the friction film includes a deformable carrier material having a porous structure and friction-increasing particles on at least one side,

wherein in addition to the friction-increasing particles, zinc particles are applied to the carrier material as spacer particles,

wherein particles of a first set of the zinc particles maintain a separation between pairs of the friction-increasing particles, and

wherein the first workpiece is connected to the second workpiece in a manner that presses the friction-increasing particles into a surface of the first workpiece and into a surface of the second workpiece.

14 . A system comprising

a first workpiece;

a second workpiece; and

the friction film according to claim 1 between the first workpiece and the second workpiece,

wherein the first workpiece is connected to the second workpiece in a manner that presses the friction-increasing particles into a surface of the first workpiece and into a surface of the second workpiece.

15 . The system according to claim 13 ,

wherein the carrier material comprises polyethylene film,

wherein the carrier material is coated with adhesive on both sides,

wherein the carrier material has a thickness of 25 μm to 50 μm, and

wherein the friction-increasing particles include titanium boride particles and/or diamond particles.