Twisted packaging is palletized:
At present, the daily chemical industry generally focuses on the internal circulation of the assembly, because it is understood that the long-distance transportation of daily chemical products basically does not have trays, or the transportation method of single-box stacking on trucks. .
At present, the mainstream packaging methods are mainly tray + PE winding film and tray + anti-slip paper. More advanced is the whole set of cold shrink film packaging. At present, the packaging of the IT industry, auto parts and precision instruments and equipment, they are mainly through the pallet for the entire supply chain.
At present, the whole shrink packaging is mainly divided into two types: heat shrinkage and cold shrinkage:
The heat shrinkage is mainly used for large-scale parts such as engineering equipment, such as elevators, yachts, etc., using PE heat shrinkable film with gas (liquefied gas) blowtorch or high-power hot air gun for heating and shrinking to achieve the effect of wrapping products to prevent external damage.
The cold shrink film is actually a kind of LLDPE sleeve, which has certain elasticity. It is blown up and indefinite in advance. It is opened by mechanical claws and automatically shrinks after being put on. At present, such a film is produced by a company in Wuxi, but such a The film must be produced in accordance with the size of the tray. Due to the need for specific equipment and different tray sizes during packaging, it is necessary to use shrink film with different diameters. Therefore, the current application is not wide. It seems that only the size of the standard tray is suitable, and the equipment is mainly imported. Because cold shrinkage is currently not overwhelming compared to the stretch film, there are fewer people.
In theory, heat shrinkage is equivalent to PE, pet or POF shrink film for our small package, but there is not such a large oven, so large equipment or trays are heated by gas (liquefied gas) torch or high-power hot air gun. The original Shanghai Sanhua Film Factory has produced this PE shrink film suitable for large equipment. Almost all of the current escalator packaging has used a heat shrinkable film to replace the previous aluminum composite bag. However, in general, there is no fire in the factory, so this heat shrinkage is less than a last resort and should be rarely chosen.
There is also an anti-slip sheet that helps stack the carton, which is very helpful for anti-slip and anti-scatter in multi-layer carton stacking, especially for pallet handling inside the factory. The surface of this kraft paper is made of non-slip coating, which is similar to the feel of flocking, and achieves the anti-slip effect of stacking products to increase friction.
Another important part of the whole package: the tray
At present, the international standards for pallets are relatively strict. For example, the European standard tray is 1200*800 and the American standard is 1219*1016.
However, at present, most of the domestic products are customized according to the custom requirements of each manufacturer, or have the same size as the American and European standards, but the material grades are different.
Earlier, China has always wanted to implement various solutions of China's own standard size pallets 1100*1100, 1040*1040, 1200*1000, but due to the national conditions and concepts, this promotion has not been carried out very effectively. At present, the trays are basically defined by reference to foreign size standards and manufacturers according to the actual size of the product.
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