초록 ▼

The invention relates to a composite film (10), in particular for packaging (1) in the food industry, having at least one sealing layer (12), which consists of sealable material and is connected, at least indirectly, to a first layer (11) which acts as an outer layer, wherein the sealing layer (12)

The invention relates to a composite film (10), in particular for packaging (1) in the food industry, having at least one sealing layer (12), which consists of sealable material and is connected, at least indirectly, to a first layer (11) which acts as an outer layer, wherein the sealing layer (12) has a lower melting point than the first layer (11). According to the invention, it is provided that, on that side of the sealing layer (12) which is directed away from the first layer (11), a second layer (13), which acts as an inner layer, is arranged in operative connection with the sealing layer (12), that the second layer (13) has a higher melting point than the sealing layer (12), and that the second layer (13) has at least one through-opening (17; 17a to 17c), which is covered over by the sealing layer (12).

대표청구항 ▼

1. A composite film (10), having at least one sealing layer (12), which consists of sealable material and is connected, at least indirectly, to a first layer (11) which acts as an outer layer, wherein the sealing layer (12) has a lower melting point than the first layer (11), wherein on that side of

1. A composite film (10), having at least one sealing layer (12), which consists of sealable material and is connected, at least indirectly, to a first layer (11) which acts as an outer layer, wherein the sealing layer (12) has a lower melting point than the first layer (11), wherein on that side of the sealing layer (12) which is directed away from the first layer (11), a second layer (13), which acts as an inner layer, is arranged in operative connection with said sealing layer (12), in that the second layer (13) has a higher melting point than said sealing layer (12), wherein a plurality of through-openings (17; 17a to 17c) is configured in the second layer (13), the through-openings being arranged evenly spaced in relation to each other, wherein at least two rows of through-openings (17, 17a to 17c) are provided, in that a strip-like zone (19) without any through-openings (17; 17a to 17c) is formed between the rows, the composite film (10) forming a folding edge such that the through-openings (17; 17a to 17c) of the second layer (13) laid against each other are arranged relative to one another in an overlapping manner and aligned, and wherein said second layer (13) has at least one through-opening (17; 17a to 17c) which is covered over by said sealing layer (12). 2. The composite film according to claim 1, characterized in that the second layer (13) consists of polyethylene terephthalate (PET). 3. The composite film according to claim 1, characterized in that at least one third layer (15) acting as a barrier layer is arranged between the sealing layer (12) and the first layer (11). 4. The composite film according to claim 1, characterized in that the sealing layer (12) consists of polyethylene (PE) and has a layer thickness of 30 μm to 100 μm, and in that the second layer (13) has a thickness of 8 μm to 20 μm. 5. The composite film according to claim 1, characterized in that the sealing layer (12) consists of polyethylene (PE) and has a layer thickness of between 50 μm and 90 μm and in that the second layer (13) has a thickness of between 12 μm and 18 μm. 6. The composite film according to claim 1, wherein the sealing layer joins through the aligned through-openings to form a bond. 7. A method for producing a film composite (1) consisting of at least one composite film (10) according to claim 1, the method comprising: aligning the at least two rows of through-openings of the second layer; and activating the at least one sealing layer by introducing heat and pressure, whereby the introduction of the heat and pressure causes a displacement of a material of the at least one sealing layer into a region of the aligned through-openings such that the material of the at least one sealing layer comes mutually into operative connection.