As a leading precision mold maker and custom plastic injection molding manufacturer based in Shanghai, China, CNMOULDING has decades of engineering expertise since 1997. Selecting the right plastic resin is critical for the success of any custom injection molded part. Below is a comprehensive guide to the top 5 common plastic resins—ranging from general-purpose polymers to high-performance engineering plastics—and how we optimize them for your tooling and production needs.
1. Thermoplastic Elastomer (TPE) Material Properties
TPE combines the high elasticity, strength, and resilience of traditional rubber with the processing efficiency of thermoplastics.
- Key Characteristics: Eco-friendly, non-toxic, excellent touch feel, superior weathering, fatigue and temperature resistance, and high processing performance without the need for vulcanization.
- Applications: Ordinary transparent toys, sports equipment, and over-molding applications. TPE demonstrates exceptional substrate adhesion to PP, PE, PC, PS, and ABS, and can also be used for standalone molding.
2. PPS (Polyphenylene Sulfide) Engineering Plastic
PPS is a high-grade engineering plastic featuring a molecular chain with alternating phenylthio groups and sulfur atoms, creating high rigidity and crystallinity.
- Key Characteristics: Outstanding heat resistance, rigidity, flame retardancy, and electrical insulation. Due to its sulfur atom structure, PPS has a great affinity for glass fiber, inorganic fillers, and metals, making it ideal for high-strength reinforced composites and alloys.
- Applications: Frequently utilized for high-performance and special-purpose plastic products in demanding industries such as medical, automotive, and electronics.
3. POM (Polyacetal / Acetal) for Precision Injection Molds
Polyacetal (POM) is renowned for its high stiffness, low friction, and excellent dimensional stability.
- CNMOULDING Advantage: As a professional injection mold maker in Shanghai, we leverage advanced tooling capabilities to process POM. We provide precision plastic injection molded parts utilizing advanced techniques such as insert molding, double-color (2K) molding, multi-cavity plastic molding, and hot runner systems integrated into the injection mold.
4. PE (Polyethylene) Main Advantages
Polyethylene is a milky-white, translucent thermoplastic with a waxy surface texture, highly valued for electrical insulation.
- Key Advantages: Exceptional chemical resistance, moisture barrier properties, and electrical insulation, making it an ideal material for wire and cable insulation and jacketing.
- CNMOULDING Advantage: We offer specialized processing for PE, supporting complex geometries through insert molding, multi-cavity tooling, and precision hot runner injection molds in our Shanghai manufacturing facility.
5. ABS Material & Custom Injection Processing Conditions
ABS (Acrylonitrile Butadiene Styrene) is one of the most widely used general-purpose engineering resins in the manufacturing industry.
- CNMOULDING Advantage: Backed by decades of manufacturing experience since 1997, our Shanghai facility utilizes unique processing technologies and strict thermal controls during custom injection molding with standard resins like ABS to eliminate warping and ensure superior surface aesthetics.
Why Choose CNMOULDING for Your Custom Plastic Solutions?
Compared to conventional materials, modern engineering plastics offer superior mechanical properties, electrical insulation, chemical resistance, wear resistance, and lightweight advantages over metals, all while reducing molding energy consumption.
At CNMOULDING, we don’t just process plastics—we engineer the entire lifecycle from precision mold design to high-end injection molding. Contact our Shanghai engineering team today to discuss material selection, DFM (Design for Manufacturing) analysis, and tooling solutions for your next project.
