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1. (WO2008148797) A METHOD FOR MANUFACTURING A NET PATTERNED ADHESIVE LAYER
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CLAIMS

1. A method for making a net patterned adhesive layer for adhesion to the skin of a living being, which net patterned adhesive layer defines net with a
predetermined pattern comprising adhesive zones spaced apart by spaces, the method comprising the steps of:

- providing an adhesive in liquid form onto a support surface,

- forcing a moulding tool defining an inverse pattern which is inverse relative to the predetermined pattern on to an application area of the adhesive so as to define the predetermined pattern in the adhesive while the adhesive is in liquid form,

- allowing at least the outer surfaces of the adhesive in the application area to become form-stable by applying curing energy to the application area, at least a part of the curing energy being applied by means of the moulding tool; and

- removing the moulding tool from the application area.

2. The method according to claim 1, wherein the temperature of the adhesive when applied to the supporting surface is below 60 degrees Celsius.

3. The method according to claim 1 or 2, wherein the area inside at least a part of the spaces is substantially devoid of adhesive material.

4. The method according to any of the preceding claims, wherein the area inside at least a part of the spaces comprises a thin layer of adhesive the thickness of which is substantially thinner than the thickness of neighbouring adhesive zones.

5. The method according to claim 4, wherein the area inside at least a part of the spaces comprises a thin layer of adhesive the thickness of which is 0 to 10% of the thickness of neighbouring adhesive zones of the net.

6. The method according to any of the preceding claims, further comprising the step of providing a release liner on the adhesive prior to the step of forcing the moulding tool into the adhesive.

7. The method according to any of the preceding claims, wherein moulding tool is drum shaped, and the supporting surface is arranged to convey the liquid adhesive from an application area to a moulding area in which the moulding tool engages the adhesive, and wherein the step of providing the adhesive and the step of forcing the moulding tool into the adhesive are performed concurrently.

8. The method according to any of the preceding claims, wherein the net pattern in two different areas, relatively, is not uniform in terms of at least one of:
- the distance between adhesive zones,
- the thickness of the adhesive zones,
- the width of the adhesive zones,
- the density of the adhesive zones and
- the cross-sectional shape of the adhesive zones.

9. The method according to any of the preceding claims, wherein the net pattern is less dense in the middle than in a rim portion thereof.

10. The method according to any of the preceding claims, wherein the adhesive zones are thicker in area of the rim than in the middle of the net.

11. The method according to any of the preceding claims, wherein the support surface defines a backing film, and wherein the width of at least one of the adhesive zones in a base area which is in contact with the backing film is substantially equal to the width of a top area, which is defined by an opposite side of the adhesive zone.

12. The method according to any of the claims 1-11, wherein the support surface defines a backing film, and wherein the width of at least one of the adhesive zones in a base area which is in contact with the backing film is smaller than the width of a top area, which is defined by an opposite side of the adhesive zone.

13. An adhesive layer with patterned adhesive wherein the patterned adhesive is made according to any of the claims 1-12.

14. A wound dressing comprising a vapour permeable but liquid impermeable backing film with a net adhesive pattern layer made according to any of claims 1-12, and an absorbent core defining one or more borders, wherein the net pattern adhesive layer extends beyond the borders of the absorbent core.