During the production process of EPE pearl cotton packaging materials, physical foaming is used instead of chemical foaming. Currently, the most common foaming method is butane gas foaming. The foaming principle is that the profitable butane gas is liquid in the tank and vaporizes at the moment of extrusion in the machine head mold. As the foaming of EPE pearl cotton resin is the result of the physical foaming agent transforming from liquid to gas, the foaming agent is required to be colorless, odorless, non-toxic, and non corrosive. After foaming, there is no residue in the polymer, and the penetration rate in the polyethylene melt is low. At room temperature, the steam pressure is low, the volatility is high, the molecular weight is low, and the density is high, The gas cost per unit volume is low, and it can be dissolved in polyethylene in extrusion state. When the temperature and pressure are increased, the amount of dissolved gas will be added, which is easy to make plastic foam into foam with very low density.

Is there a risk with pearl cotton foam machines?

Many inexperienced people who are not familiar with the production of pearl cotton often say that it is easy to explode and start a fire, but in fact, this is due to the use of butane gas during the production of pearl cotton. Due to the fact that butane gas is a flammable substance, it is similar to liquefied gas used for cooking at home. During the production process, maintaining ventilation and prohibiting fireworks in the workshop can eliminate this risk. Additionally, the planning of the factory, workshop, and warehouse should be reasonable and complete. Finished products need to be stored in a timely manner and cannot be randomly stacked together.

The factors for the ignition of gas butane gas are nothing but a few: 1. There is a leakage of butane gas. 2. Poor ventilation in the workshop, and the leaked gas in a short period of time causes the concentration of butane in the room to reach a relatively high level. 3. There is an open flame or electric spark. These three elements are indispensable, and the production technology of the foaming machine is now very advanced. When operating, follow the manufacturer's operating rules and procedures, and the risk of fire and explosion can be completely eradicated. So we don't have to talk about the production of pearl cotton foam, we feel it's very risky.


Article source: Heshan Pearl Cotton - Heshan Hongli Plastic Products Co., Ltd
www.hshangli.com