With the development in recent years, China has become a container bag production base. However, more than 80% of the container bags produced in China are exported, and the requirements of foreign markets for container bags are getting higher and higher, with the continuous expansion of storage functions and scale and the widespread use of container bags in bulk packaging, how to control and prevent the harm caused by static electricity in container bags packaging goods has aroused great attention in Europe and the United States. In order to strictly control the quality, strive for a larger foreign market, and ensure the safety of the transportation of goods, it is extremely important to understand the harm and prevention knowledge of static electricity generated in the storage of containerized goods. The harm of static electricity has received considerable attention in the packaging industry production, but in the storage and transportation of packaged goods, the harm and prevention of static electricity is still a weak link.
Causes of static electricity in packaged goods storage There are two main causes of static electricity:
One is the internal cause, that is, the conductive properties of the substance; The second is the external cause, that is, the mutual friction, rolling, and impact between the materials. Many of the packaging of goods have the internal conditions of electrostatic generation, in addition to the storage are inseparable from the handling, stacking, covering and other operations, so the packaging will inevitably produce friction, rolling, impact and so on. The plastic packaging of general goods is easy to generate static electricity due to mutual friction during the stacking process.
The harm of static electricity in the storage of packaged goods gathers on the surface of the package to form a high electrostatic potential, which is easy to generate electrostatic sparks. Its harm is mainly manifested in two aspects: first, it causes deflagration accidents. For example, the contents of the package are flammable substances, and when the vapor emitted by them reaches a certain proportion of air, or when the solid dust reaches a certain concentration (that is, the explosion limit), it will explode once it encounters an electrostatic spark. The second is the phenomenon of electric shock. Such as electrostatic high potential discharge during the handling process, to bring electric shock discomfort to the operator, which occurs frequently when handling plastic packaged goods in the warehouse. In the process of handling and stacking, electrostatic high potential discharge is generated due to strong friction, and even the operator is knocked down by electrostatic discharge.
The following methods are generally used in the storage of packaged goods to prevent and control the harm caused by static electricity:
1. The packaging should be controlled as far as possible not to generate static electricity. For example, when handling flammable liquid, it is necessary to limit its violent shaking in the packaging barrel, control its loading and unloading methods, prevent leakage and mixing of different oil products, and prevent water and air intake in the steel barrel.
2. Take measures to disperse the generated static electricity as soon as possible to avoid accumulation. For example, install a good grounding device on tools such as handling, increase the relative humidity of the workplace, lay a conductive floor on the ground, and spray conductive paint on some tools.
3. Add a certain amount of counter-charge to the charged body to avoid rising static voltage (such as induction electrostatic neutralizer).
4. In some cases, the accumulation of static electricity is inevitable, and the rapid rise of static voltage will even produce electrostatic sparks. At this time, measures should be taken to make it discharge but not to produce an explosion accident. For example, the space where flammable liquids are stored is filled with inert gas, an alarm device is installed, and an exhaust device is used, so that flammable gas or dust in the air cannot reach the explosion limit.
5. In places with fire and explosion hazards, such as chemical dangerous goods storage places, staff wear conductive shoes and electrostatic work clothes, etc., to eliminate static electricity carried by the human body in time.
Post time: Apr-13-2023