Composite material for cushion packaging and preparation method thereof

Abstract

The invention discloses a composite material for cushion packaging and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 50 to 70 parts of biaxially oriented polypropylene, 28 to 45 parts of nano cellulose whisker, and 2 to 5 parts of coupling agent. Through a reasonable formula, the synergetic effect can be fully exerted, the calcium carbonate is not used, and thus the production cost is reduced. At the same time, due to the synergetic effect between biaxially oriented polypropylene and nano cellulose whisker, the prepared material can overcome the shortages such as bad low-temperature buffering property, easy aging, and the like, moreover, the ductility is effectively improved, and the composite material has the advantages of high impact strength, tensile strength and tear strength, lightness, softness, and good wear resistant performance. Furthermore, the cushion packaging material prepared from the composite material has the advantages of dampness and water resistant property, high toughness, difficulty in breaking, excellent impact resistant performance, dustless and pollution-free surface, and environment-friendliness, and can be recovered for several times.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a composite material prepared from polypropylene and nanocellulose whiskers, that is, a composite material used for cushioning packaging and a preparation method thereof. Background technique [0002] Any product is inseparable from packaging, and a product without packaging cannot become a commodity. As an important part of commodity packaging, packaging materials play a pivotal role in the packaging industry. Plastic cushioning packaging has become a research hotspot in packaging materials due to its excellent product protection function, light weight and low price. The most widely used packaging material is polypropylene material, which is a thermoplastic resin made from propylene polymerization. It is odorless, non-toxic, feels like wax, and has excellent low temperature resistance (the minimum operating temperature can reach -100 ~-70°C) and has good chemical sta...

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Problems solved by technology

However, this material also has certain shortcomings, such as poor low-temperature cushioning performance, easy aging, and poor heat resistance in post-processing molding. Therefore, traditional polypropylene plastics cannot be used as cushioning materials.

[0003] At present, the composite of calcium carbonate and polypropylene is widely used, but since polypropylene is an organic substance and calcium carbonate is an inorganic substance, it is easy to cause uneven mixing and dispersion of raw materials in the process of preparation and fusion of the two, making the final product mechanically unstable. Unstable performance, such as easy tearing, uneven thickness, etc., and the material is not environmentally friendly, not easy to degrade, and causes white pollution

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