PACKAGING MATERIAL, METHOD FOR PRODUCING SAID PACKAGING MATERIAL, AND USE THEREOF

Abstract

The invention relates to a packaging material for medical purposes. The packaging material comprises a packaging base material having an outer paper surface, a release lacquer that coats an entirety of the outer paper surface, and a sealing medium that is applied on the release lacquer in a grid pattern. The invention further relates to a method for producing the packaging material and its use.

Claims

1-11. (canceled)

12. A packaging material, in particular for medical purposes, the packaging material comprising: a packaging base material having an outer paper surface; a release lacquer that coats an entirety of the outer paper surface; and a sealing medium that is applied on the release lacquer in a grid pattern.

13. The packaging material according to claim 12, wherein the release lacquer is a polyamide-based release lacquer.

14. The packaging material according to claim 12, wherein the sealing medium comprises polyolefins, or polyester, or a mixture of polyolefins and polyester, and ethylene-vinyl acetate copolymer.

15. The packaging material according to claim 12, wherein the sealing medium is applied on the release lacquer as a dispersion.

16. The packaging material according to claim 15, wherein the dispersion comprises a mixture of water and ethylene-vinyl acetate copolymer.

17. The packaging material according to claim 15, wherein the dispersion further comprises water as a solvent, and is a heat-sealable dispersion.

18. The packaging material according to claim 12, wherein the sealing medium is applied on the release lacquer with an application weight in the range from 0.5 g/m.sup.2 to 6 g/m.sup.2.

19. The packaging material according to claim 12, wherein the packaging material is gas permeable.

20. The packaging material according to claim 12, wherein the packaging material is a medical paper.

21. A method for producing a packaging material, comprising: coating an entirety of an outer paper surface of a packaging base material with a release lacquer; and applying a sealing medium on the release lacquer in a grid pattern.

22. A method for producing a medical container, comprising: feeding a sealing medium of a packaging material according to claim 1 to a counterpart material; and heat-sealing the sealing medium with the counterpart material.

23. The method of claim 22, wherein the sealing medium is ethylene-vinyl acetate copolymer and the counterpart material is polyethylene.

24. The packaging material according to claim 14, wherein the sealing medium comprises polyethylene or polypropylene, or polyethylene terephthalate, or a mixture of polyethylene or polypropylene and polyethylene terephthalate, and ethylene-vinyl acetate copolymer.

25. The packaging material according to claim 14, wherein the sealing medium seals against polyolefins, or polyester, or paper, or polystyrene, or a mixture of at least two of polyolefins, polyester, paper, or polystyrene.

26. The packaging material according to claim 25, wherein the sealing medium seals against polyethylene or polypropylene, or polyethylene terephthalate, or paper, or polystyrene, or a mixture of at least two of polyethylene or polypropylene, polyethylene terephthalate, paper, or polystyrene.

27. The packaging material according to claim 16, wherein the dispersion further comprises an amount of an alcohol selected from the group consisting of ethanol, propanol, isopropanol, or butanol, in the range from 0.01 wt-% to 8 wt-%.

28. The packaging material according to claim 27, wherein the amount of alcohol is in the range from 0.1 wt-% to 6.5 wt-%.

29. The packaging material according to claim 27, wherein the amount of alcohol is in the range from 3.5 wt-% to 5 wt-%.

30. The packaging material according to claim 16, wherein the dispersion further comprises a second sealing medium.

31. The packaging material according to claim 17, wherein the dispersion does not comprise any solvent other than the water.

32. The packaging material according to claim 18, wherein the sealing medium is applied on the release lacquer with an application weight in the range from 1.5 g/m.sup.2 to 5 g/m.sup.2.

33. The packaging material according to claim 18, wherein the sealing medium is applied on the release lacquer with an application weight in the range from 2 g/m.sup.2 to 4 g/m.sup.2.

34. The packaging material according to claim 12, wherein the packaging base material comprises plasma-treated paper.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In the following, the invention is described with exemplary embodiments on the basis of figures, showing:

[0043] FIG. 1 a schematic representation of an embodiment of the invention; and

[0044] FIG. 2 a schematic representation of the embodiment of the invention according to FIG. 1, whereby the packaging material according to the invention is first connected to a counterpart and then separated from it again.

DETAILED DESCRIPTION

[0045] In the following, the same reference numbers are used for identical and similarly parts.

[0046] FIG. 1 shows an embodiment of a packaging material 10 according to the invention, which consists of a packaging base material 12 of plasma-treated paper with a basis weight of 60 g/m.sup.2, on the lower surface of which, as shown in FIG. 1, a release lacquer 20 based on polyamide is applied over the entire surface with an application quantity of 1.5 g/m.sup.2. A sealing medium 30 is in turn applied to this release lacquer 20 in a grid pattern, the application weight of the sealing medium being 3 g/m.sup.2.

[0047] FIG. 2 shows a schematic representation of the embodiment of the invention according to FIG. 1, wherein the packaging material 10 according to the invention is first connected to a counterpart 40 and then separated from it again. For this purpose, the packaging material 10 according to the invention is firstly joined to the counterpart 40 in such a way that the sealing medium 30, which is connected to the packaging base material 12 via the release lacquer 20, is fed to the counterpart 40, in this case polyethylene, and sealed with it. The counterpart 40 in turn is arranged on a carrier material 42. According to the invention, ethylene-vinyl acetate copolymer is used as sealing medium 30, which seals against polyethylene with an optimal sealing force. When separating the packaging material 10 according to the invention from the counterpart 40, the sealing medium 30 remains on this counterpart 40. Furthermore, with the sealing medium 30, a part of the release lacquer 20 remains at the counterpart 40, wherein the release lacquer 20 breaks during the separation of the packaging material 10 according to the invention from the counterpart 40 and remains at the packaging base material 12 in those areas in which, with an intact packaging material 10, no sealing medium 30 was arranged on the release lacquer 20 before the packaging material 10 was joined to the counterpart 40. Thus, if an attempt were made to rebond the remaining packaging base material 12 with the release coating, a layer also consisting of release coating would be located opposite the counterpart 40, so that a rebonding of the packaging base material 12 with the counterpart 40 is not possible.

[0048] According to another example of the invention, a plasma-treated paper web 12 with a basis weight of 80 g/m2 is fully coated with a polyamide-based release lacquer 20. Release lacquer 20 is applied with a basis weight of 1.6 g/m2. In turn, an aqueous heat-sealing dispersion 30 with a basis weight of 3.1 g/m2 is applied to this release coating 20 in a grid pattern.

[0049] It should be noted at this point that all the parts described above, taken individually and in any combination, in particular the details shown in the figures, are claimed to be inventive. Modifications of this are familiar to the skilled person.

REFERENCE SIGNS

[0050] 10 packaging material [0051] 12 packaging base material [0052] 15 outer paper surface [0053] 20 release lacquer [0054] 30 sealing medium [0055] 40 counterpart [0056] 42 carrier material