COMPOSITE MATERIAL, PROCESS FOR ITS PRODUCTION AND ITS USE AS PACKAGING MATERIAL
A composite material ( 1 ) includes a carrier layer ( 2 ) and a sealing layer ( 3 ), the carrier layer being detachably connected to the sealing layer. According to the invention, a zone ( 5 ) of separation is formed between the carrier layer and the sealing layer, whereby at least the surface region ( 2′ ) of the carrier layer ( 2 ) that borders the sealing layer ( 3 ) includes non-polar substances and at least the surface region ( 3′ ) of the sealing layer ( 3 ) that borders the carrier layer ( 2 ) includes polar substances or at least the surface region ( 2′ ) of the carrier layer ( 2 ) that borders the sealing layer ( 3 ) includes polar substances and at least the surface region ( 3′ ) of the sealing layer ( 3 ) that borders the carrier layer ( 2 ) includes non-polar substances.
1 . Composite material 1 comprising a carrier layer 2 and a sealing layer 3 , the carrier layer 2 being detachably connected to the sealing layer 3 , characterized in that to form a zone 5 of separation between the carrier layer 2 and the sealing layer 3 , at least the surface region 2 ′ of the carrier layer 2 that borders the sealing layer 3 comprises non-polar substances and at least the surface region 3 ′ of the sealing layer 3 that borders the carrier layer 2 comprises polar substances or that at least the surface region 2 ′ of the carrier layer 2 that borders the sealing layer 3 comprises polar substances and at least the surface region 3 ′ of the sealing layer 3 that borders the carrier layer 2 comprises non-polar substances.
2 . Composite material according to claim 1 , wherein the carrier material 9 for forming the carrier layer 2 is present as a monomaterial with a layer thickness of 7-150 microns, preferably 20-70 microns.
3 . Composite material according to claim 1 , wherein the carrier material 9 for forming the carrier layer 2 is present as a composite with a layer thickness of 20-150 microns, preferably 50-70 microns.
4 . Composite material according to claim 1 , wherein the carrier layer 9 is printed on one and/or both sides.
5 . Composite material according to claim 1 , wherein the sealing layer 3 is present as a monomaterial with a layer thickness of 15-150 microns, preferably 30-70 microns.
6 . Composite material according to claim 1 , wherein the sealing layer 3 is present as a composite with a total thickness of 20-250 microns, preferably 30-70 microns.
7 . Composite material according to claim 1 , wherein the sealing layer 3 has additives, such as dyes and/or fillers.
8 . Composite material according to claim 1 , wherein the sealing layer 3 has predetermined breaking points 4 in the form of surface punches, through punches or holes.
9 . Composite material according to claim 1 , wherein the sealing layer 3 on its outside has spacers 12 with rough surfaces.
10 . Composite material according to claim 1 , wherein the sealing layer 3 has embossing bridges 12 ′ on its outside.
11 . Composite material according to claim 1 , wherein the carrier material 9 has an outside layer 6 with a separating layer 8 .
12 . Composite material according to claim 11 , wherein to form the carrier layer 2 , the separating layer 8 is connected to the carrier material 9 by way of an adhesive 7 .
13 . Composite material according to claim 11 , wherein the separating layer 8 in at least the surface region 8 ′ bordering the sealing layer 3 consists of non-polar substances and the sealing layer 3 on at least the surface region 3 ′ bordering the separating layer 8 consists of polar substances.
14 . Composite material according to claim 11 , wherein the separating layer 8 in at least the surface region 8 ′ bordering the sealing layer consists of polar substances and the sealing layer 3 on at least the surface region 3 ′ bordering the separating layer 8 consists of non-polar substances.
15 . Composite material according to claim 1 , wherein as non-polar substances, polyethylene, polypropylene, and their non-polar copolymers and non-polar derivatives are selected.
16 . Composite material according to claim 1 , wherein as polar substances, polyethylene terephthalate, polyamide and aluminum are selected.
17 . Process for producing a composite material according to the invention according to claim 1 , wherein the sealing layer 3 is applied to the carrier layer 2 by lacquering and/or lamination and/or extrusion.
18 . Process for producing a composite material according to the invention according to claim 1 , wherein the carrier layer 2 is formed as a precomposite consisting of the carrier material 9 and an outer layer 6 , the outer layer 6 being formed from a layer of adhesive 7 and a separating layer 8 and wherein then the sealing layer 3 is applied to the outer layer 6 by lamination, lacquering or extrusion.
19 . Process according to claim 17 , wherein within the sealing layer 3 , predetermined breaking points 4 are produced by punching in, punching through or by means of lasers.
20 . Process according to claim 17 , wherein the predetermined breaking points 4 are produced by sealing tools using pressure and elevated temperature, material displacement of the sealing layer taking place in the region of the predetermined breaking points.
21 . (canceled)
22 . (canceled)
23 . (canceled)