How to reduce white pollution in packaging industry
White pollution is explicitly prohibited, but some companies or individuals still ignore the regulations, but Wanda, as a packaging company, can only do its own thing in its place. For example, the plastic steel belt produced by Wanda Plastic Steel Belt is strongly resistant to sub-charging. The plastic steel belt must be made of pure material instead of recycled material to produce plastic steel belt. It is said that the plastic belt is environmentally friendly, recyclable and recyclable.
With the country's emphasis on white pollution, the use of environmentally friendly materials instead of foam plastics as buffer packaging materials has become a development trend, and all-paper packaging has also become a new favorite of modern packaging to avoid trade barriers. In recent years, the structure development of paper packaging materials has developed rapidly. The structure of the buffer material has also changed from a single type to a complex type, from a process type to a functional type. The paper takes paper honeycomb material, corrugated board and pulp molded products as examples to analyze the structure development of buffer paper materials.
Paper honeycomb material
Paper honeycomb is famous for its advantages of light weight, environmental protection, sound insulation, shock resistance, high cost performance, etc. It is mainly used to buffer the product from shock or vibration during transportation or loading and unloading. The structure of paper honeycomb mainly includes regular hexagon, rectangle, prism, corrugated, square, sparsely arranged circle, densely arranged circle, and triangle. The traditional paper honeycomb structure is in the shape of a regular hexagon. It is pasted on multiple layers of paper and glued together, dried, cut into pieces, and then pulled apart to form a regular hexagonal structure. The regular hexagonal paper honeycomb is a labor-intensive product and is not suitable for fully automated production.
The 3D folding paper honeycomb core adopts a new packaging machinery technology, which can be produced at high speed, and its production cost is lower than the current production cost of traditional paper honeycomb core. The most important feature of 3D folding paper honeycomb cores is that they can absorb a lot of energy compared with the current honeycomb structure damage prevention and earthquake resistance. In addition, 3D folding core can reduce its cost. Because the 3D folding paper honeycomb can be rotated, wound, and bent, it can be easily used to process any packaging products. The packaging made by the 3D folding paper honeycomb is relatively small, light, and has a good role in protecting the product. Irregular fragile products can be wrapped in 3D folding paper honeycomb and placed in other packaging containers. The use of new paper folding technology can achieve no printing on the packaging, and the use of this folding technology can be made into the company's LOGO. The 3D folding paper honeycomb can not only play the role of promotion, but also protect the product from shock and vibration.
Corrugated board
In order to replace foam plastics, people have used corrugated cardboard structure to develop a variety of corrugated cardboard combined cushion packaging materials. In 1996, KimDoWook and KimKiJeong developed the double-ply reinforced corrugated board on the basis of the original corrugated board. On the basis, the compressive strength of corrugated cardboard is increased.
It is understood that the researchers conducted a four-point bending experiment on five different types of corrugated cardboard, and the results show that the new structure of corrugated cardboard has better structural advantages than traditional corrugated cardboard. Folding corrugated composite materials have high load-bearing performance, and their static buffering energy absorption is also large, which is more suitable for buffer packaging of products with large weight and hard surface.
The load-bearing performance of corrugated, honeycomb and corrugated composite materials depends largely on the mechanical properties of the honeycomb sandwich. Corrugated, honeycomb, and corrugated composite materials greatly increase the thickness of the composite material with few materials, and their buffer energy absorption efficiency is improved compared to the simple corrugated stacking.
Pulp molded products
Pulp molded products are mainly used in the packaging of industrial products, such as egg trays, fresh fruit trays, food and semi-finished products packaging, medical equipment packaging, etc. Pulp molded products are generally processed by combining multiple sets of molds. With the improvement of mold technology, it is now possible to produce cavity-shaped pulp molded products, most of which are used as containers or ornaments. The combined processing method is to realize the packaging function required for a certain application by combining multiple pulp molded bodies of different shapes during molding. In foreign countries, disposable pulp molded urinals have replaced polyester materials for multiple use of urinals. With the improvement of mold technology, the structure of pulp molded products tends to become more complicated and detailed.
In addition to traditional honeycomb paperboard, corrugated paperboard and pulp model products, foam paper particles that currently meet environmental protection requirements have also been gradually developed and used in the cushioning of electronic products. A company in Hamburg, Germany, shredded the waste paper and mixed it with starch. The slurry was made into granules, placed in a sealed container, applied high pressure and high temperature steam, and then quickly depressurized. The granule packaging foamed. Porous balls are formed into foam packaging materials, which can be used as cushioning materials. The cushioning performance is better than EPS, suitable for cushioning packaging of electronics, instruments and sensitive materials.
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