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Commodity Plastics Injection Molding Materials (ABS, PP, PE)
Commodity plastics represent the backbone of the global manufacturing industry, accounting for the vast majority of plastic parts produced today. These materials—primarily ABS, Polypropylene (PP), and Polyethylene (PE)—are prized for their versatility, low weight, and exceptional cost-effectiveness. At JUCHENG, we specialize in the high-volume injection molding of these standard thermoplastics. With a facility equipped with high-speed injection machines ranging from 50T to 1000T, we offer scalable manufacturing solutions, from single-cavity prototype molds to high-cavitation production tools, delivering millions of consistent parts for the consumer electronics, packaging, and household appliance sectors.
Plastics Injection Molding Materials

JUCHENG's Molding Capabilities for Commodity Plastics

To maximize the value of these cost-effective materials, efficient processing is key. JUCHENG delivers:
  • Multi-Cavity Tooling: We design and manufacture multi-cavity molds and family molds to produce multiple parts per cycle, drastically reducing unit costs.
  • Hot Runner Systems: For high-volume PP and PE parts, we utilize hot runner systems to eliminate runner waste and reduce cycle times.
  • Surface Finishing: While these are "commodity" materials, we elevate them with premium mold textures (VDI/SPI), high-gloss polishing (for ABS), and in-mold labeling (IML).
  • Insert Molding: We can integrate metal inserts into ABS or PP parts during the molding process for enhanced assembly strength.
injection molded parts

Detailed Material Profiles

We stock and process the complete range of general-purpose thermoplastics:
1、ABS (Acrylonitrile Butadiene Styrene)
 
  • Description: ABS is the most common amorphous polymer used for structural housings. It bridges the gap between commodity and engineering plastics, offering a great balance of rigidity, impact strength, and glossy aesthetics.
  • Key Advantages: excellent surface finish (high gloss), good impact resistance, easy to paint and glue, low shrinkage compared to semi-crystalline plastics.
  • Ideal Applications: Consumer electronics housings (routers, remote controls), keyboard caps, household appliance bodies, toys (LEGO-like bricks).
2、Polypropylene (PP)
  • Description: A semi-crystalline thermoplastic known for its chemical resistance and flexibility. We offer both Homopolymer (higher strength/stiffness) and Copolymer (higher impact resistance/flexibility).
  • Key Advantages: Lowest density of common plastics (floats in water), resistant to chemicals and moisture, high fatigue resistance (Living Hinges), food-safe grades available.
  • Ideal Applications: Living hinge caps, food containers, automotive bumpers, chemical tanks, medical packaging.
3、Polyethylene (PE) Family
  • HDPE (High-Density Polyethylene):
Traits: Rigid, tough, and chemically resistant. High strength-to-density ratio. Opaque/waxy finish.
Apps: Industrial buckets, fuel tanks, rigid bottle caps, cutting boards.
  • LDPE (Low-Density Polyethylene):
Traits: Flexible, soft, and tough. More transparent than HDPE. High ductility.
Apps: Squeeze bottles, snap-on lids, flexible tubing, cable insulation.

Comprehensive Comparison Table

Physical properties comparison of standard injection molding grades:
Property ABS (General Purpose) PP (Homopolymer) HDPE (High Density) LDPE (Low Density) Unit
Structure Amorphous Semi-Crystalline Semi-Crystalline Semi-Crystalline -
Density 1.04 - 1.07 0.90 - 0.91 0.94 - 0.96 0.91 - 0.93 g/cm³
Mold Shrinkage 0.4 - 0.7 1.0 - 2.5 1.5 - 3.0 1.5 - 3.5 %
Tensile Strength 30 - 50 30 - 40 20 - 30 8 - 12 MPa
Flexural Modulus 2,000 - 2,500 1,200 - 1,700 1,000 - 1,400 200 - 400 MPa
Notched Impact High Low/Medium High Very High -
Heat Deflection (0.45 MPa) 90 - 100 100 - 110 70 - 80 40 - 50 °C
Cost Level Medium Low Low Low -
 

FAQ: Commodity Plastics

Q: Can PP be painted?
A: PP has low surface energy, making paint adhesion difficult. We recommend using colored resin (pigmented) instead of painting, or flame treatment if painting is necessary.
Q: Which material is best for outdoor use?
A: Standard ABS yellows under UV light. For outdoor housings, we recommend adding UV stabilizers or switching to ASA (Engineering grade). Black HDPE offers decent UV resistance.
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    Shenzhen: Fourth Industrial Zone, Xisha Road, Shajing Street, Baoan District, Shenzhen.
    Dongguan: Building 5 and 4, No. 198, Chang'an Section, Guanchang Road, Chang'an Town, Dongguan.
     
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