Retort foood packaging film containing graphene
A food packaging and graphene technology, applied in the directions of packaging food, packaging, wrapping paper, etc., can solve the problems of thicker core layer packaging material and large amount of aluminum used, and achieve increased mechanical strength, reduced aluminum use, and barrier properties. added effect
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[0063] 1. Example
[0064] 1-1. Formation of sealant layer and surface layer
[0065] Polypropylene and nylon resins were prepared to be melted at a temperature of 240° C., extruded at an extrusion rate of 800 kg / h, and supplied to a T-die. Afterwards, the polypropylene melt is processed without stretching to form a sealant layer with an average thickness of 40 μm to 50 μm, and the nylon resin melt is processed without stretching to form a sealant layer with an average thickness of 15 μm to 30 μm. sealant layer.
[0066] 1-2. Formation of the core layer
[0067] Aluminum raw material (ribbon) is prepared and processed in sheet form by passing it between 2 rotating rolls at recrystallization temperature to form a core layer with an average thickness of 35 μm to 40 μm.
[0068] 1-3. Formation of retort food packaging film
[0069] Arrange the sealant layer, core layer, and surface layer in order on the roll for lamination, and pull out by the driving roll to form an average ...
experiment example 1
[0074] Experimental example 1: Durability comparison between retort food packaging materials containing graphene and prior art
[0075] As a result of confirming the retort food packaging materials prepared in the above-mentioned Example, Comparative Example 1, and Comparative Example 2, in Comparative Example 1 in which the thickness of the core layer was 50 μm and in the implementation of making the thickness of the core layer 35 μm to 40 μm In the example, the barrier properties of moisture, oxygen, etc. were confirmed, and in Comparative Example 2 in which the thickness of the core layer was 40 μm, it was confirmed that cracks appeared on the surface, and the barrier properties of moisture, oxygen, etc. exhibited decreased. Therefore, in Example 1 including graphene, it was confirmed that there is an effect that even if the thickness of the core layer is thin, the durability and barrier properties are increased, so that the retort food packaging material can be fully embodi...
experiment example 2
[0076] Experimental example 2: Durability comparison by measuring the molded crack depth of a retort food packaging material containing graphene and the prior art
[0077] Retort food packaging materials were produced in the same manner as in the above-mentioned examples, and the difference in effect based on the above-mentioned graphene content was confirmed. Specifically, for the above adhesive layer, with respect to 100 parts by weight of the total adhesive, 0.0005 parts by weight, 0.001 parts by weight, 0.005 parts by weight, 0.01 parts by weight, 0.05 parts by weight, 0.1 parts by weight, 1.0 parts by weight are added parts, 1.5 parts by weight, 2.0 parts by weight, 2.5 parts by weight, 3.0 parts by weight, 3.5 parts by weight, 4.0 parts by weight, 4.5 parts by weight, and 5.0 parts by weight of graphene, thereby preparing a cooking food packaging material. Also, the effect based on the graphene content was confirmed by measuring the molded fracture depth at which the ret...
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