Why should plastic screw caps adopt thread design?

The thread structure of plastic screw caps plays an important role in sealing, and the dimensions of the thread include parameters such as pitch, diameter, and thread depth. The choice of thread size will affect the firmness and tightness of the connection between the nut and the container or pipe. Correctly matching thread sizes is key to ensuring a tight seal.

The sealing performance of plastic screw caps directly affects the taste and quality of beverages. Sealing performance is a key factor in preventing outside air, moisture and other contaminants from entering beverage packaging. If the sealing performance is insufficient, air and moisture may enter the beverage, causing oxidation, fermentation, or contamination. These factors will reduce the freshness of the drink and affect its taste and quality.

Some drinks may contain volatile ingredients, such as carbon dioxide gas in sparkling drinks. Plastic screw caps with good sealing properties can prevent the loss of these volatiles and maintain the smell and taste of the drink. The taste of a drink is often one of the key factors in its appeal. If the sealing performance is not good, the beverage may be contaminated by other foods or external odors, resulting in crossover flavors. In addition, effective sealing performance can extend the shelf life of beverages. It can prevent the invasion of microorganisms and reduce the risk of beverage spoilage, thereby ensuring that the beverage maintains good taste and quality during the shelf life.