Composite heat-insulation packaging material

Abstract

The invention relates to a packaging material, particularly a thermal-insulation packaging material which comprises pressure-resistant layers, a plastic thermal-insulation composite layer and a flame-retardant PE (polyethylene) film. The foam thermal-insulation packaging material is hydraulically formed, and foam salient points are uniformly distributed on the surface of the foam thermal-insulation packaging material structure. The packaging material is characterized in that both sides of the plastic thermal-insulation composite layer are respectively connected with the pressure-resistant layer, and the flame-retardant PE film is attached to the surface of the pressure-resistant layer on one side; and the pressure-resistant layer and the plastic thermal-insulation composite layer, and the pressure-resistant layer and the flame-retardant PE film are respectively bonded through an adhesive. The pressure-resistant layer and the plastic thermal-insulation composite layer, and the pressure-resistant layer and the flame-retardant PE film are respectively hydraulically bonded through the adhesive, so that the combination is firm, and the plastic thermal-insulation composite material can not have severe necking phenomenon in the hydraulic process, thereby avoiding severe waste of energy sources and raw materials. The combination of the multiple the pressure-resistant layers can greatly enhance the resistance to external impact force, and the prepared container has high structural strength and is more convenient to use.

Description

[0001] technical field [0002] The invention relates to packaging materials, in particular to a composite foam-shaped thermal insulation packaging material. Background technique [0003] At present, disposable disposable packaging containers used for packaging constant temperature liquid food have square, triangular and other shapes. Usually, the outermost layer of thermoplastic material, core layer, middle layer of thermoplastic material, barrier layer and adhesive layer are used to manufacture these packaging containers. And the innermost layer of thermoplastic materials, there are also low-density polyethylene and polyester (laminated packaging materials with multi-layer structure) produced by high pressure method. These packaging containers can pack some special medicines, ice cream, cream, some cooked chilled meat, active lactic acid bacteria drinks (yogurt, Yakult, Miquan, etc.), freshly squeezed juice or 100% original juice content, high-grade Seafood and other food...

AI Technical Summary

Problems solved by technology

The Chinese invention patent application publication specification is CN1337914A patent discloses a paper container packaging material, at least the constituent layers include the outermost layer of thermoplastic material, the paper substrate layer, the barrier layer and the innermost layer of thermoplastic material, and each constituent layer is as described above. Sequential lamination, however, in the extrusion lamination process of this packaging material in the manufacturing process, severe necking will occur when the barrier layer is extruded from the die of the extruder into a film in a molten state, that is, the extrusion die The two sides will shrink toward the middle, the edge thickness will be uneven or even cracks will appear, so that the two sides of the paper base layer will not be covered or the covering thickness will be uneven. This phenomenon will cause packaging materials to appear in the actual use process. The manufacturing process is complicated, the qualified rate of finished products is low, and the insulation effect is not obvious

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