English
The 30-neck bottle cap is a classic example of industrial design that blends structural mechanics (threads), materials science (seals), and ingenious design (anti-theft rings). The internal threads are the cap's core functional structure, but they don't provide the primary seal. Instead, they engage with the threads at the neck of the 30-neck preform, converting rotational motion into downward linear motion. This interlocking motion generates strong downward pressure.
The vertical stripes on the exterior of the 30/25 bottle cap perform both sealing and opening functions. During opening, they significantly increase the static friction between the user's finger and the cap, making it easier to open. When tightening the cap mid-drink, the stripes prevent the user's finger from slipping on the smooth plastic surface while ensuring the cap is tightened sufficiently to maintain a seal.
Every detail of the bottle cap significantly enhances the convenience and reliability of our daily products, embodying the human touch of industrial design.
en
