A kind of sealing plastic bottle cap and the plastic of making this bottle cap

Abstract

The invention discloses a sealing plastic bottle cap. The sealing plastic bottle cap comprises a bottle neck and a bottle cap. The bottle neck is connected onto an opening of a bottle and is of a hollow structure with an open upper end and an open lower end, and threads are arranged on the outer surface of the bottle neck; the bottle cap is of a hollow structure with an open lower end, a middle-layer cap with an open upper end and an open lower end is arranged on the upper side surface of an inner cavity of the bottle cap, threads are arranged on the inner side wall of the middle-layer cap, and an inner-layer cap which is positioned inside the middle-layer cap is arranged on the upper side surface of the inner cavity of the bottle cap and is closely clamped in an upper port of the bottle neck when the middle-layer cap is rotationally connected onto the outer surface of the bottle neck in a threaded manner. The sealing plastic bottle cap has the advantages that the opening does not need to be sealed by aluminum foils, the middle-layer cap can be rotationally connected onto the bottle neck in the threaded manner, the inner-layer cap can be closely clamped in the upper port of the bottle neck, and accordingly seamless clinging and sealing effects can be realized; sealing effects still can be guaranteed for the opening after the sealing plastic bottle cap is repeatedly opened and closed. The invention further provides plastics for manufacturing the sealing plastic bottle cap.

Description

technical field

[0001] The invention belongs to the technical field of bottle caps, and in particular relates to a sealed plastic bottle cap and the plastic used to manufacture the bottle cap. Background technique

[0002] The bottle cap is used to seal the bottle and has the function of keeping the contents closed. It is the key product of bottle container packaging. Therefore, it is widely used in bottled products and is an important part of food and beverage packaging. It is also the first choice for consumers. where it comes into contact with the product. According to different functions, there are bottle caps of different shapes and different operation methods. For example, the caps of mineral water bottles are round and twisted, and the caps of soda cans are ring-shaped and pulled.

[0003] At present, most of the bottles are sealed with a layer of aluminum foil on the bottle mouth, and the bottle cap is placed on the bottle mouth to complete the sealing. However, the...

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