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Polymers in Plastic Injection Molding

Views: 0     Author: Site Editor     Publish Time: 2025-03-03      Origin: Site

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Thermoplastics soften when heated and harden when cooled, making them re-moldable and recyclable. Up to 30% of regrind is commonly blended with virgin resin to maintain performance.


MaterialCharacteristicsCommon Applications
ABS (Acrylonitrile Butadiene Styrene)- Opaque, amorphous plastic
- Lightweight, rigid, and tough
- Low melting point, good processability
- Automotive parts
- Sports equipment
- Pipes
- Lego bricks
Polycarbonate (PC)- Transparent
- High impact strength
- Heat-resistant and tough
- Eyewear lenses
- Bulletproof glass
- Containers
- Automotive components
Nylon (Polyamide)- Tough and flexible
- High mechanical strength, often glass-reinforced
- Resistant to friction and chemicals
- Absorbs moisture (hygroscopic)
- Gears, bearings
- Electrical housings
- Engine components
Polypropylene (PP)- Tough, elastic, and fatigue-resistant
- Good chemical and electrical resistance
- Low melt viscosity (easy to mold)
- Packaging
- Automotive interiors
- Household goods
Polyethylene (PE)
(LDPE, MDPE, HDPE, UHMWPE)
- Varies by density:
 - LDPE: Flexible, low strength
 - HDPE: Tough, higher strength
- Excellent chemical resistance and impermeability
- Packaging films
- Bottles and containers
- Medical tubing
- Bulletproof materials

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