Dispute between aluminum bottle cap and plastic bottle cap
At present, due to the fierce competition in the domestic beverage industry, many well-known enterprises are adopting the latest production technology and equipment, so that China’s capping machinery and plastic capping production technology have reached the world advanced level. At the same time, in the field of plastic bottle cap production, the dispute between injection molding and compression molding technology has also opened a big curtain. Technological innovation is undoubtedly the driving force for the rapid development of plastic anti-theft covers.
（1） Aluminum anti-theft bottle cap
The aluminum anti-theft bottle cap is made of high-quality special aluminum alloy materials. It is mainly used for the packaging of wine, beverage (including steam and without steam) and medical and health care products, and can meet the special requirements of high-temperature cooking and sterilization.
Aluminum bottle caps are mostly processed in production lines with a high degree of automation, so the requirements for material strength, elongation and dimensional deviation are very strict, otherwise they will break or crease during processing. In order to ensure that the bottle cap is easy to print after forming, the material plate surface of the bottle cap is required to be flat and free of rolling marks, scratches and stains. Generally, the alloy states used include 8011-h14, 3003-h16, etc. the material specification is generally 0.20mm ~ 0.23mm thick and 449mm ~ 796mm wide. Aluminum bottle cap material can be produced by hot rolling or continuous casting and rolling, and then cold rolling. At present, the production plants of anti-theft cover materials in China mostly use continuous casting and rolling blank, which is better than casting and rolling blank.
（2） Plastic anti-theft bottle cap
Plastic bottle cap has complex structure and anti backflow function. Its surface treatment methods are diverse, with strong three-dimensional sense and unique and novel appearance, but its inherent defects can not be ignored. Because the glass bottle adopts thermoforming process, the size error of the bottle mouth is large, and it is difficult to achieve high sealing. Relevant packaging experts pointed out that due to the strong static electricity, the plastic bottle cap is easy to absorb dust in the air, and the debris generated during ultrasonic welding is difficult to remove. At present, there is no complete solution to the problem of wine pollution caused by plastic debris. In addition, in order to reduce the cost, individual plastic bottle cap manufacturers adulterate the raw materials to make false, and the sanitary situation is worrying. Because part of the bottle cap is connected with the glass bottle mouth and is not easy to recycle, environmental protection experts believe that its pollution to the natural environment is obvious. In addition, the cost of plastic bottle caps is about twice or more than that of aluminum bottle caps.
In contrast, the aluminum anti-theft bottle cap can overcome the above shortcomings of the plastic bottle cap. The aluminum anti-theft cap has the advantages of simple structure, strong adaptability and good sealing effect. Compared with the plastic cap, the aluminum cap not only has superior performance, but also can realize mechanized and large-scale production, with low cost, no pollution and recycling. If special and advanced printing methods are adopted, not only rich and colorful patterns can be printed, but also the anti-counterfeiting effect is very good. Of course, the aluminum bottle cap also has some defects, such as different colors on the side of the bottle cap, easy paint falling off and lack of change in appearance, but these problems can be solved technically.
Post time: Dec-10-2021