Any material for manufacturing medical gadgets must adhere to industry standards. Thermoplastics, especially those termed ‘medical-grade plastics’, comply with all FDA requirements, making them an excellent material for fabricating medical injection devices.

Moreover, plastic polymers are relatively cheaper than metals and alloys yet offer comparable durability and mechanical properties. So using plastics for manufacturing medical devices is a reasonable way to cut healthcare costs without compromising quality.
On the other hand, plastics are generally more flexible to work with during the manufacturing processes and even when it comes to the usability of the final products. Unlike metals, plastics are inert materials. So they are often a better choice for manufacturing components that will interact with organic tissues.