The plastic cover has a complicated structure and has anti-backflow function. The surface treatment methods are various, the stereoscopic effect is strong, and the appearance is unique and novel. These are all benefits, but there are two sides to everything, and there are some shortcomings.
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1. The cost of the plastic cover is higher than that of the aluminum bottle cap;
2. Individual plastic cover manufacturers in order to reduce costs, doping in raw materials to make fake, health conditions are worrying;
3. Because the glass bottle adopts the thermoforming process, the bottle mouth size error is large, and it is difficult to achieve high sealing performance;
4. Because part of the bottle cap is connected with the bottle mouth, it is not easy to recycle. Environmental experts believe that its pollution to the natural environment is obvious;
5. The packaging experts pointed out that due to the strong static electricity, the plastic cover is easy to absorb the dust in the air, and the debris generated during ultrasonic welding is difficult to remove.
