Pressure compensation label for sticking to a surface, and method

Pressure compensation label (10) for adhesive affixation to a surface of a housing or of another article provided with a pressure compensation opening, wherein the pressure compensation label (10) has the following:

• a first film (1) for adhesive affixation to a surface provided with a pressure compensation opening,
• an outer, second film (2), and
• an air-permeable membrane film (3), which is disposed between the first film (1) and the second film (2),
• wherein the first film (1) has a recess (6) intended for positioning above a pressure compensation opening, as well as a number of ventilation channels (7), and wherein each of the ventilation channels (7) is separated from the recess (6) by a film region (8) of the first film (1),
• wherein the membrane film (3) covers the recess (6) and each of the film regions (8) between the recess (6) and the number of ventilation channels (7), and
• wherein the outer, second film (2) extends laterally beyond the membrane film (3), covers the number of ventilation channels (7) of the first film (1) at least in certain regions, outside of the membrane film (3), and spans a ventilation path (L), which leads from the specific surface of the membrane film (3) that faces the second film (2) all the way to the number of ventilation channels (7) of the first film (1), and
• wherein the pressure compensation label (10) has an air-permeable spacer (14) between the membrane film (3) and the second film (2).

Pressure compensation label (10) for adhesive affixation to a surface of a housing or of another article provided with a pressure compensation opening, wherein the pressure compensation label (10) has the following:

• a first film (1) for adhesive affixation to a surface provided with a pressure compensation opening,
• an outer, second film (2), and
• an air-permeable membrane film (3), which is disposed between the first film (1) and the second film (2),
• wherein the first film (1) has a recess (6) intended for positioning above a pressure compensation opening, as well as a number of ventilation channels (7), and wherein each of the ventilation channels (7) is separated from the recess (6) by a film region (8) of the first film (1),
• wherein the membrane film (3) covers the recess (6) and each of the film regions (8) between the recess (6) and the number of ventilation channels (7), and
• wherein the outer, second film (2) extends laterally beyond the membrane film (3), covers the number of ventilation channels (7) of the first film (1) at least in certain regions, outside of the membrane film (3), and spans a ventilation path (L), which leads from the specific surface of the membrane film (3) that faces the second film (2) all the way to the number of ventilation channels (7) of the first film (1), and
• wherein the pressure compensation label (10) has at least two ventilation channels (7) in the first film (1), and wherein the membrane film (3) possesses recesses, constrictions (22) or at least a smaller lateral expanse in the direction of the ventilation channels (7) than in the directions between adjacent ventilation channels (7).

Pressure compensation label (10) for adhesive affixation to a surface of a housing or of another article provided with a pressure compensation opening, wherein the pressure compensation label (10) has the following:

• a first film (1) for adhesive affixation to a surface provided with a pressure compensation opening,
• an outer, second film (2), and
• an air-permeable membrane film (3), which is disposed between the first film (1) and the second film (2),
• wherein the first film (1) has a recess (6) intended for positioning above a pressure compensation opening, as well as a number of ventilation channels (7), and wherein each of the ventilation channels (7) is separated from the recess (6) by a film region (8) of the first film (1),
• wherein the membrane film (3) covers the recess (6) and each of the film regions (8) between the recess (6) and the number of ventilation channels (7), and
• wherein the outer, second film (2) extends laterally beyond the membrane film (3), covers the number of ventilation channels (7) of the first film (1) at least in certain regions, outside of the membrane film (3), and spans a ventilation path (L), which leads from the specific surface of the membrane film (3) that faces the second film (2) all the way to the number of ventilation channels (7) of the first film (1), and
• wherein the first film (1) is a film that is adhesive on both sides, and wherein the second film (2) is adhesively affixed to the first film (1) in a contact surface region (9) situated laterally outside of the membrane film (3).

Method for the production of pressure compensation labels (10), each pressure compensation label (10) of which has the following:

• a first film (1) for adhesive affixation to a surface provided with a pressure compensation opening,
• an outer, second film (2), and
• an air-permeable membrane film (3), which is disposed between the first film (1) and the second film (2),
• wherein the first film (1) has a recess (6) intended for positioning above a pressure compensation opening, as well as a number of ventilation channels (7), and wherein each of the ventilation channels (7) is separated from the recess (6) by a film region (8) of the first film (1),
• wherein the membrane film (3) covers the recess (6) and each of the film regions (8) between the recess (6) and the number of ventilation channels (7), and
• wherein the outer, second film (2) extends laterally beyond the membrane film (3), covers the number of ventilation channels (7) of the first film (1) at least in certain regions, outside of the membrane film (3), and spans a ventilation path (L), which leads from the specific surface of the membrane film (3) that faces the second film (2) all the way to the number of ventilation channels (7) of the first film (1), and
• wherein the ventilation channel(s) (7) is/are further recesses of the first film (1), at a distance from the recess (6) wherein the method comprises:
• a) punching (B) the recesses (6) and the ventilation channels (7) into a continuous first film web (101) that is adhesive on both sides, the two sides of which web are covered by a first (31) and a second adhesive protection film (32), wherein the first adhesive protection film (31) and the first film web (101) are punched through, whereas the second adhesive protection film (32) remains unpunched,
• b) removing (C) the unpunched second adhesive protection film (32) from the first film web (101) and, in this regard, removing (C) film pieces of the first film web (101) as well as film pieces of the first adhesive protection film (31) from the punched recesses (6) and ventilation channels (7), in each instance,
• c) adhesively affixing (D) a third adhesive protection film (33) to the side of the first film web (101) that faces away from the first adhesive protection film (31),
• d) exposing the other side of the punched first film web (101) by removing (E) the first adhesive protection film (31) from the first film web (101),
• e) adhesively affixing (F) individual pieces of air-permeable membrane films (3) to the exposed side of the first film web (101),
• f) adhesively affixing (H) a second film web (102) to the side of the first film web (101) covered with the membrane films (3), and
• g) punching out a plurality of pressure compensation labels (10) from the material web formed in this manner, which encompasses the first film web (101) and the second film web (102), wherein for each pressure compensation label (10) the first film web (101) forms the first film (1) and the second film web (102) forms the outer, second film (2).