For plastic injection molding, both the quality and characteristics of the finished product depend on a variety of factors, and one of the most important is the material used. Different kinds of resins offer different capabilities. If you need to produce medical devices that include plastic components, here’s what you should know about some of the most popular materials available. 

3 Common Materials Used in Plastic Injection Molding

1. Polypropylene 

Valued for its flexibility and durability, polypropylene (PP) is often used in packaging. Because it doesn’t disintegrate when exposed to the chemicals found in detergents, it’s ideal for use in products that must be cleaned frequently, like those found in medical facilities. It’s also highly resistant to chipping and cracking, which makes it suitable for mechanical components like hinges.

However, PP is vulnerable to UV radiation. It’s also flammable, so it shouldn’t be used in high-heat applications. 

2. Low-Density Polyethylene

As one of the most versatile resins, polyethylene has a lot of tensile strength. It’s often used to create plastic bags, films, bottles, and geomembranes.

Low-density polyethylene (LPDE), in particular, is highly resistant to both chemicals and moisture. Therefore, it’s used to produce all kinds of consumer goods, medical products, and housewares. But it can warp in high temperatures, so it shouldn’t be exposed to heat. 

3. Polycarbonate 

Polycarbonate is an amorphous, transparent thermoplastic. Unlike most resins, it’s essentially shatterproof and can withstand forceful impacts without cracking. Plus, it retains its strength both during and after the molding process and is resistant to UV rays. You can find polycarbonate in cellphones, eyewear, automotive components, and medical devices. 

Once you’ve decided which type of resin to use for your medical devices, turn to Pacific Integrated Manufacturing for all your plastic injection molding needs. Based in Bonita, CA, this 50,000-square-foot plant has served suppliers in the life science, healthcare, and diagnostic sectors for more than 15 years. With their state-of-the-art equipment, they mass-produce all kinds of products efficiently, and they pass these savings on to their customers. To request a quote for your products, reach out online or call (619) 921-3264.