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Under high temperature conditions, pigments and resins in plastics are prone to oxidation, leading to color changes.

Plastic packaging screw cap jars, with their advantages of simple structure, controllable cost, and strong functional flexibility, have become one of the mainstream containers.

In today's consumer market, which values ​​experience and transparency, packaging for food and daily necessities has long transcended its function as a mere container, becoming a silent medium of dialogue between brands and consumers.

During the production process, the thread fit between the screw cap and the tank body needs to meet certain precision requirements to ensure good sealing performance.

Low-temperature drop testing is also essential. Plastics become brittle and their impact resistance decreases in low-temperature environments, so it is necessary to ensure that the product still has sufficient drop resistance in low-temperature environmen

In the entire canned food production chain, seal integrity is the core factor determining whether a product can be safely stored and consumed long-term.