Preparation method for lamination blocking type package materials

Abstract

The invention relates to a preparation method of laminated packaging material with barrier property. The preparation method comprises a step of performing a surface treatment method for two side surfaces of base materials with the barrier property to obtain a double-sided barrier layer; a step of compositing one side surface of a supporting-layer base material with one surface of the barrier layer in step 1 through extruding; and a step of compositing a protection layer with the other surface of the barrier layer in step 2, and compositing a heat-sealing layer with the other side surface of the supporting-layer base material. The supporting layer is composed with a light shielding layer and a printing layer, thereby reducing requirements of printing for cardboard, greatly improving resolution of images and reducing cost at the same time. By using a plasma method to process the barrier base material, the barrier layers, instead of aluminium foil, are formed at two side surface of the barrier base material, so that problems of difficult recovery and degradation caused by discharging of the aluminium foil can be reduced, and blocking rate of oxygen can be improved at the same time.

Description

technical field

[0001] The invention relates to a preparation method of a packaging material, more specifically, to a preparation method of a laminated barrier packaging material. Background technique

[0002] Aseptic packaging material is a multi-layer laminated packaging material, which is mainly composed of paper, plastic and aluminum foil. It has excellent oxygen and moisture barrier functions, so the food it packs, including liquid food, has a long shelf life.

[0003] However, this multi-layer aseptic packaging material has its own limitations. First, it needs to use cardboard directly as the printing receiving surface and support layer, which has high requirements for the surface state and fiber morphology of the cardboard itself. Ordinary It is difficult for cardboard to meet the specific printing requirements, and papermaking consumes a lot of technical materials, and the chemicals used in papermaking are very harmful to the environment; secondly, it uses aluminum f...

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