Aluminum vs plastic vs glass
A can making machine is a designated machine meant to make cans. Can usually come in different materials; these include aluminum cans, plastic cans, and tin cans. Making these cans also involve different ways; for instance, tin cans can be achieved through lock seaming or welding. Processing industries use cans for packaging juices and soft drinks for easy storage and distribution. However, depending on the material, it has advantages and disadvantages including the impact on the environment.
Making a plastic can
The material used in making plastic cans is mainly PET. Like other plastics, PET is manufactured from non-renewable petroleum and is made up of long chains of carbons. PET products such as bottles are made through processes like stretch blow molding and injection method. In this case a plastic material is injected through molding and finally extruded using air pressure to achieve the desired shape.
A glass is made from non-renewable products such as silica, sand, and limestone. Compared to petroleum products, glass adds less environmental damage during extraction. During the manufacturing, high amount of energy is required of up to 1200 degrees Celsius to break down elements.
On the hand, aluminum cans are made from elements like bauxite. It is mined through dredging mines or open-pit and they also have some damaging environmental impacts. However, about 40-70 percent of aluminum products are recycled. Unlike the aluminum virgin material, when content is recycled, it uses 90 to 95 percent less energy. While in glass bottles, about 75 percent of energy is saved when recycled.
A research done in the United States indicates glass bottles disposed of has a high environmental impact compared to aluminum cans. It also has climate change potential of about 23 percent. When you compare the three, PET plastic bottles have the lowest impact on global warming while the glass bottles and aluminum can have 40 and 23 percent potential on global warming respectively.
When it comes to weight, glass material weighs much higher than the other two materials. For instance, a middleweight PET bottle usually weighs 24g while a 335ml aluminum can weigh 11g. So taking into account the weight of transporting these materials, aluminum and PET bottles are more suitable.
When choosing a can making machine, you should first take into account the nature of the bottle you want. Some are rectangular, round bottom, and others have irregular shapes. Depending on your preferences, always go for the best that features automatic functionalities.