Distribution process and packaging quality (on)

The quality of packaging depends not only on the production of packaging containers, but also directly affected during the use, protection, handling, storage, and other circulation processes. These factors are often overlooked by people in practice.
First, the problems in the use of packaging
1. Filling the contents When filling the contents, many people think that the better the loading, the neglect of the expansion coefficient of the contents of the package. For example, if a foreign trade company exports down jackets to Kazakhstan, the shipments are produced in winter. After packing, the bundles are bundled with down coats and packed in cardboard boxes. After a few months, the shipments arrive. At the port, it was hot weather. When the contents were heated, they swelled violently. The squares of the boxes were made to look like balls. Some of the boxes were badly damaged, causing the goods to be exported and left in the port warehouse.
Regardless of the filling of solids and liquids, the expansion coefficient of the contents must be taken into account during the selection, design and use of the packaging. After the filling, there must be a certain space in the container to ensure that the thermal expansion of the contents does not cause changes in the packaging quality. Content overflows. Especially when filling liquids should be filled to 98% of the total volume.
2. seal
No matter which type of packaging you use, seal it properly. Improperly sealed packaging can cause changes in the quality of the contents, contamination, spillage, etc., and may even result in vicious accidents. For example, in 1987, China exported a batch of yellow phosphorus (which is a pyrophoric substance and was required to be soaked in water during transportation). Due to improper sealing, water leakage from the barrel caused spontaneous combustion of yellow phosphorus in the barrel and the entire ship caught fire and suffered heavy losses. Another example: In 2001, a batch of sodium hydroxide was exported and used in plastic woven bags. The sealing line used for sealing was polyester thread. After a few days, the contents contained a chemical reaction with the sealing line, and the sealing line was blown. The shipment had not yet been issued. The contents were spilled in the warehouse.
Such things as economic damage caused by improper packaging and sealing occur from time to time. Although some of the product standards are required for packaging seals, most of the product standards and related materials are consulted by the author, and the requirements for packaging seals are not detailed or inconvenient. Sealing is also one of the issues that can be easily overlooked.
——Packaging in barrels, the mouthpieces of the barrels and the mouths of the barrels must be tightly fitted with appropriate sealing rings. The degree of tightness should meet the sealing requirements. The wrench hoop also needs a pin to lock the wrench.
——Packages for bags, whether ropes, adhesives, heat-sealing, or stitching, must ensure that there is no spillage of the contents, no gas is contained in the bags, and the selected rope or line does not react with the contents.
Box packing: If wooden boxes or fiberboard boxes are used, the seals should be fastened with iron nails or U-shaped nails. They should be fastened and should not be turned. The box should be tightly packed with packing straps. If cardboard boxes, calcium plastic boxes, etc. are used, seal them with self-adhesive tape not less than 5 cm wide, and the sagging length shall not be less than 5 cm, and the box shall be tightly packed with packing tape.
Second, there are problems in the protective packaging The quality of goods in the circulation process in many forms, including: physical changes, chemical changes, physiological and biochemical changes and so on. In order to prevent changes in the flow of goods, often take protective measures on the packaging, and its protective packaging are common: waterproof, moisture, mold, rust, pest control, shock, bacteria, magnetic, radiation and so on.
Improper use of protective packaging can also cause economic loss or quality accidents. For example, a batch of porcelain tableware exported to the Commonwealth of Independent States in 1995, due to the unqualified shockproof packaging (buffered packaging), the shockproof material was too small and the selection material was too thin to be suitable for long-distance transportation, the porcelain cutlery collided with each other during transportation. After the shipment arrived at the port, the breakage rate reached 30%, and foreigners refused to accept it. Another example: In 1998, an electromechanical company imported 15,000 sets of bearings from France, due to waterproof, rust-proof packaging failed, water in the box during the transport, there are 4162 sets of bearings after the arrival of severe corrosion, can not be used. Thus, protective packaging is an indispensable part of commodity packaging, and we should pay attention to it. First, it is necessary to take into account various factors in the circulation process of commodities and choose appropriate protective packaging to truly protect the contents. Second, protective materials (such as adsorbent materials, gasket materials, etc.) and contents cannot cause chemical reactions or other adverse reactions. Third, the protective packaging should be operated according to the procedural rules during operation. (To be continued)