Development of cushioning packaging materials

The development of modern commodity economy has promoted the circulation of commodities. In order to avoid damage during the transportation of goods, buffer packaging technology has emerged.
Before using a lot of foam as a buffer packaging material, people mainly use rice, wheat husks, shavings, paper scraps, wood wool and rattan filaments to fill the gaps in the packaging containers, and play a role in limiting isolation and buffering. However, these materials are prone to moisture absorption, and are prone to mildew and worms after absorbing moisture. Moreover, due to the scattered use, the packaging operation is difficult, and the cushioning performance is difficult to predict; when disassembled, the messiness is complicated and unpleasant, so it cannot be used for packaging of high, refined and sharp products, and it is even less suitable for gift packaging. To this end, people have developed a series of buffer packaging materials.
Foam plastic foam has become a widely used buffer material in modern times due to its good cushioning properties and vibration absorption properties. Foam plastics have the advantages of light weight, easy processing, good protection performance, wide adaptability, and low price, but also have the disadvantages of large size, waste can not be naturally weathered, and incineration processing will produce harmful gases. With the severe environmental pollution and the scarcity of resources in the natural world, the hazards of foam plastics to the environment have caused people's great concern. Although degraded plastics have been developed with the development of science and technology, such plastics are expensive, the processing conditions are strict, and they cannot be degraded 100%. Therefore, the widespread application of such degradable plastics is limited. Therefore, foam plastic will gradually be replaced by other environmental protection buffer materials.
Paper buffer packaging materials The use of paper buffer packaging materials has been a long history. However, due to the price and performance advantages of foam plastics, the development of paper buffer packaging materials has been limited. In recent years, serious environmental pollution problems have prompted people to shift their attention to the development of environmentally friendly materials; Paper cushioning packaging material is one of them. The paper buffer packaging materials that are currently used in the market are corrugated cardboard and honeycomb paperboard.
Corrugated paperboard has the advantages of good processability, low cost, wider use temperature range than foam, and no packaging hazards. However, there are also some disadvantages: if the surface is hard, the surface of the contents cannot be directly contacted when packing high-grade goods, and relative movement between the contents and the buffer board may damage the surface of the contents; poor moisture resistance; .
Honeycomb paperboard has high strength and rigidity, low material consumption, light weight, and core density almost equal to foamed plastic. The beeboard has good shockproof and soundproof properties because the inner core is filled with air and does not communicate with each other. The production of honeycomb paperboard adopts recycled paperboard materials and water soluble adhesives, which can be recycled 100%. It overcomes the hazards of foamed plastic liners to people and the natural environment. It is a substitute for wooden boxes and plastic boxes (including plastic trays and foam plastics) in the field of packaging. A new type of green packaging material. Suitable for the transportation and packaging of precision instruments, meters, household appliances and fragile items.
Because of its unique structure, honeycomb paperboard has stronger compressive and dismantling resistance than corrugated board. In terms of production cost, the production efficiency of honeycomb paperboard production equipment is much lower than that of corrugated paperboard, so the corrugated paperboard is much lower than the honeycomb paperboard at the material processing fee.
The results of this study preliminarily demonstrated the superior performance of corrugated cardboard and honeycomb paperboard composites. This will be the direction of future development of paper buffer packaging materials.
Pulp molding pulp is molded with pulp (or waste paper) as the main raw material, and after pulping and seasoning, it is injected into a mold to form and dry it. The raw materials of the products are rich in sources, and the production and use process are pollution-free. The products have light weight, high compressive strength, good cushioning properties and good recyclability. Pulp molded products have developed rapidly in China, but due to their limited strength, they are currently used only in the buffer packaging of some small electronic products, fruits, eggs, etc., and cannot be used for buffer packaging of heavier products.
Air Cushioning Material The early cushioning material for air cushioning was air-cushioned film. It was formed by high-frequency hot-pressing of polyvinyl chloride film and filled with nitrogen. It was similar to a small pillow and was transparent and elastic. It was suitable for cushioning packaging of light and small products. However, the air-cushion film is susceptible to expansion and contraction due to the ambient air temperature. Swelling will cause damage to the outer case and the packaged goods, shrinkage will cause the contents of the package to move, thereby destabilizing the package and ultimately causing product damage.
The new air cushioning material consists of polyurethane material with flexibility and elasticity and common air cushioning material, which overcomes the above shortcomings of the air cushion film. At the same time, it also uses multi-layer polyethylene film and high-strength, abrasion-resistant nylon cloth as the surface material of the cushion, extending its service life, making it possible to recycle, greatly reducing the environmental pollution caused by packaging waste. Panasonic Japan has used this cushioning material for the packaging of compact DVDS machines and will use them in the packaging of small precision instruments and large appliances.
Plant Fiber Cushion Packaging Materials Plant fiber cushion packaging materials are developed considering the full use of natural resources. The materials that have been developed so far include crop straw cushioning materials, polylactic acid foaming materials, waste paper, and foam fillers for starch packaging.
The shock-absorbing cushioning material can be made by using the crop crushed material and the binder as raw materials, mixing, cross-linking reaction, foaming, casting, baking setting, natural drying and the like, and the material can be made into low stress. Under the conditions, it has better cushioning performance than polystyrene foam, and it can be degraded and raw materials are cheap and available.
The use of waste paper and starch as a raw material for the preparation of salt packaging foam filler, is the waste paper or poor quality paper cut or crushed into fine, crushed into a unique fiber, and then blended with the starch, and then apply the foaming method Make it a porous pellet. The use of such beads as packaging foam fillers can withstand collisions that are less expensive than styrene, and more importantly, the material can be quickly decomposed by microorganisms and fungi after being discarded. It will not adversely affect the environment.
Maize is a widely grown crop in northern China. Plant fiber cushioning materials make full use of this resource, so it has great potential for development. In the absence of human resources, focusing on the development of such materials, it is also the trend of the development of buffer packaging materials.