Fillers are materials added to plastics to enhance their physical properties, reduce production costs, and improve performance characteristics. Common fillers include calcium carbonate, talc, and glass fibers. These fillers can reinforce the plastic, making it stronger and more rigid, which is particularly useful in applications requiring enhanced strength, such as automotive parts and construction materials. Moreover, fillers can enhance the thermal and electrical properties of plastics, making them suitable for a broader range of applications.
APIs can be derived from various sources, including natural substances (like plant extracts) and synthetic processes (like chemical synthesis). Regardless of their origin, APIs undergo rigorous testing and regulations to ensure they meet safety and efficacy standards before being incorporated into pharmaceuticals.