Metal bottle with composite bottleneck and preparation method of metal bottle with composite bottleneck

Abstract

The invention provides a metal bottle with a composite bottleneck and a preparation method of the metal bottle with the composite bottleneck. The metal bottle comprises a metal bottle body and an inner-layer bottleneck made of a plastic material, the metal bottle body comprises a metal bottle body and a metal bottle bottom, the metal bottle bottom is matched and sealed at the bottom of the metal bottle body, the inner-layer bottleneck is tightly embedded in a metal bottleneck at the upper end of the metal bottle body to form the composite bottleneck, wherein the inner-layer bottleneck is formed by one-step injection molding in the bottleneck at the upper end of the metal bottle body, or the inner-layer bottleneck which is injection molded in advance is assembled into the bottleneck at theupper end of the metal bottle body to form. The bottleneck of the metal bottle does not need to be prefabricated with threads, the sealing performance is high, and a plastic leakproofness gasket doesnot need to be prefabricated on a bottle cap due to the plastic of the inner-layer bottleneck has the leakproofness performance.

Description

technical field [0001] The invention belongs to the field of packaging, and in particular relates to a method for preparing a metal bottle used for packaging food, medicine, beverages and other products, in particular to a metal bottle with a bottle mouth compounded with a plastic layer. Background technique [0002] For many years, the metal containers used for beverage packaging are mainly cans. Since the invention of thin-walled metal bottles with screw caps in Japan, they have been widely used in beverage packaging such as beer and coffee. The trend of replacing traditional cans is very obvious. Metal bottles are light-proof, air-tight and have good airtightness. However, due to the complexity of the packaging process, the sealing treatment of the bottle mouth is a major problem that plagues metal bottle packaging in occasions where high airtightness is required. On the other hand, the manufacturing cost of such metal bottles and caps is high, and the packaging requires ...

AI Technical Summary

Problems solved by technology

[0002] For many years, the metal containers used for beverage packaging are mainly cans. Since the invention of thin-walled metal bottles with screw caps in Japan, they have been widely used in beverage packaging such as beer and coffee. The trend of replacing traditional cans is very obvious. Metal bottles are light-proof, air-tight and have good airtightness. However, due to the complexity of the packaging process, the sealing of the bottle mouth is a major problem that plagues metal bottle packaging in occasions where high airtightness is required.

On the other hand, the manufacturing cost of such metal bottles and caps is high, and packaging requires a special production line, which further pushes up the application cost

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