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Why are bottle caps made of thin aluminum strips

June 10, 2019

Why are bottle caps made of thin aluminum strips? For the strips have excellent performances in moisture resistance, air insulation and freshness keeping. Specifically thin aluminum strips have the following advantages as a raw material for bottle caps.

thin aluminum strips for bottle caps

First, the strips applied in bottle caps are of superior quality, nontoxic material and proper hardness. The caps will not get rusty or pollutes food inside bottles. They can be removed directly, and once removed, they get deformed. Thus the caps are disposable actually, and it’s almost impossible for someone to open the bottle, put something (drugs, for example) in and cap the bottle as it was sealed originally. Second, thin aluminum strips have a moderately hardness as well as has strong anti-seismic and isolation capabilities. These endow finished caps with good buffering, shock resistance, heat insulation, moisture resistance and chemical corrosion resistance. As a result, the caps are non-toxic, non-absorbent and dust-free with excellent peeling resistance and sealing performance. Third, the aluminum strip adapts to various processing methods. When an aluminum cap is made, the stainless steel pellets can be made to withstand high temperature, water resistance, alcohol resistance, etc. According to customer requirements, and the pattern design can adopt color printing, convex characters and milling. When the aluminum strip stock is made into aluminum caps, the inner pad of a cap is made of special epoxy material with advanced production technology, which brings about excellent tightness and a larger surface, making it more convenient to print logos and patterns that adds value to the bottled food.

In a word, thin aluminum strips are used as a raw material for bottle caps because of their medium hardness, good insulation performance and excellent resistance to all kinds of corrosion.

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