The material selection challenge

Navigating the world of plastic injection moulding can be complex, and choosing the right material is arguably the most critical decision you’ll make. It affects everything from your product’s performance and durability to its aesthetic and production cost. With a vast array of polymers available, it’s not always easy to know which one is the perfect fit.

Choosing the right material means balancing several key factors:

• Functionality: Does the material need to be flexible or rigid? What about its thermal or chemical resistance?
• Aesthetics: Do you need a specific color, surface finish, or transparency?
• Cost: What’s the budget for the part, both per unit and for the tooling?
• Environment: Are you looking for a sustainable option like a bioplastic or recycled polymer?

The wrong choice can lead to costly redesigns and manufacturing issues down the line. That’s why working with a partner who understands the nuances of each material is so important.

Common thermoplastics – the “everyday workhorses”

Polypropylene, polyethylene and polystyrene dominate general plastic moulding applications thanks to low cost, easy processing and chemical resistance. ABS and polycarbonate add impact strength, dimensional stability and clarity, making them ideal for mechanical fixtures and housings, automotive trims and medical devices. These materials balance performance and affordability in high‐volume applications.

Engineering plastics – for tough jobs

Nylon, polyphenylene sulphide and acetal offer superior mechanical properties, wear resistance and heat tolerance. These materials can manage higher loads and temperatures, making them suitable for gears, bearings and under‐bonnet automotive components. Offering higher melt temperatures and precise processing requirements can help justify the higher cost in demanding applications.

Bioplastics – for a greener future?

Polylactic acid and bio‐polyethylene offer renewable sources and biodegradability for eco‐friendly products. Though they may exhibit lower impact strength or heat resistance, advances in compounding and blends are closing performance gaps, making them viable for packaging, consumer goods and disposable items.

Engineering a solution with Skar

The Skar team works with you to understand your product’s specific needs, helping you navigate this complex landscape. We’ll help you balance cost, functionality, and longevity to select the optimum material for your project’s success. By leveraging our decades of experience, we provide guidance that ensures your product meets all its technical requirements while remaining commercially viable.

Whether you’re exploring the reliable, cost-effective properties of common thermoplastics like polypropylene and polyethylene, or delving into the superior strength of engineering plastics like nylon, we’ll help you make an informed decision. We even keep a close eye on the latest advancements in bioplastics and other sustainable materials to ensure we can recommend the best option for a greener future.