Performance Characteristics And Testing Of Plastic Caps

Plastic caps are a common form of packaging for bottles, cans, and barrels, especially in the fields of beverages, chemicals, and medicine. According to their uses, they can be divided into air-permeable plastic covers and air-impermeable plastic covers.

Plastic covers generally use polyolefin as the main raw material, and are processed by injection molding, hot pressing and other processes. Plastic anti-theft caps are required to be easy for consumers to open, but also need to avoid leakage problems caused by poor sealing performance. How to reasonably control the sealing performance of bottle caps is the focus of on-line or off-line testing by production units.

performance characteristics

1. There is a ring-shaped leak-proof ring on the top inner wall of the general plastic cover; there are also ordinary plastic barrel covers that need to match the inner cover, so there is no need to design a leak-proof ring;

2. The lower end of the plastic cover is connected with an anti-theft ring through a tension reinforcement;

3. At the same time, on the inner wall of the anti-theft ring, there are several sheet-shaped swinging pull wings evenly distributed;

The plastic bucket lid designed in this way has the characteristics of firm sealing, good leak-proof and anti-theft performance, safe and convenient to use, can effectively prevent the liquid in the container from external pollution, and can ensure that the packaging of various liquid products meets national safety standards.

So how to reasonably control the sealing performance of plastic caps is the focus of online or offline testing by production units. For plastic anti-theft bottle caps, because of the need to test the degree of sealing, a positive pressure seal tester is used, but the positive pressure seals on the market The tester injects compressed air directly into the sealed container, so that it will inevitably explode when the container is defective. According to expert calculations, if a 2.5-liter Coke bottle explodes at 1.2MPa, its destructiveness is quite In 100-150 grams of explosives.

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