Final answer:
Injection moulding has the largest volume of business in the plastics manufacturing industry, utilizing widely produced plastics like polyethylene and polypropylene. Recycling these materials is also crucial for environmental sustainability and industrial efficiency.
Step-by-step explanation:
Among the various manufacturing methods for plastics, injection moulding is currently the process with the largest volume of business. It is extensively used to manufacture a wide range of products due to its versatility and efficiency. This method involves injecting molten plastic material into a mould to produce parts of desired shapes and sizes. Materials such as polyethylene and polypropylene, which account for a significant portion of the plastic market with polyethylene being the most common plastic and polypropylene being highly profitable, are commonly used in injection moulding.
Recycling has also become a significant aspect of the plastics industry. Plastic recycling is essential due to the enormous quantity of plastic waste generated, which poses environmental concerns. Polyethylene, polypropylene, and other plastics are collected, processed, and repurposed into new products. Recycled plastics have to meet the requirements of various applications, and their use has improved the efficiency of plastic production operations significantly.