What are the popular plastic resins for injection molding?

The following are 10 popular resins for injection molding, along with their characteristics and applications:

1. Acrylonitrile Butadiene Styrene Copolymer (ABS)

- Characteristics: It has good comprehensive properties, excellent mechanical properties, with remarkable rigidity, hardness, impact resistance, and abrasion resistance. It is easy to process and mold, has a good surface quality, and excellent chemical resistance and electrical insulation properties.

- Applications: Widely used in the fields of electronic and electrical product casings, automotive interior and exterior parts, toys, office supplies, etc.

2. Polycarbonate (PC)

- Characteristics: It has high transparency, with a light transmittance of about 90%. It has high mechanical strength, excellent impact resistance, good heat resistance, and can be used continuously at 120 - 130℃. It also has good electrical insulation and weather resistance.

- Applications: Commonly used in the manufacturing of optical discs, eyeglass lenses, automotive headlight covers, transparent components of electronic and electrical products, and building sun panels, etc.

3. Polypropylene (PP)

- Characteristics: It has a low density and is one of the lightest varieties among commonly used plastics. It has good heat resistance and can be used above 100℃. It has good chemical stability and is resistant to acids, alkalis, salts, etc. It has good mechanical properties, especially a balanced combination of rigidity and toughness.

- Applications: Widely applied in the fields of daily necessities, packaging, automotive, medical devices, etc., such as plastic basins, buckets, woven bags, automotive interior parts, disposable syringes, etc.

4. Polyethylene (PE)

- Characteristics: It has good flexibility, low-temperature resistance, water resistance, and chemical stability, as well as excellent electrical insulation properties. According to different densities, it can be divided into Low-Density Polyethylene (LDPE), High-Density Polyethylene (HDPE), and Linear Low-Density Polyethylene (LLDPE), etc. LDPE has good flexibility and transparency; HDPE has higher rigidity, hardness, and mechanical strength.

- Applications: LDPE is commonly used in the manufacture of films, plastic bags, hoses, etc.; HDPE is used for manufacturing pipes, sheets, plastic turnover boxes, trash cans, etc.

5. Polyvinyl Chloride (PVC)

- Characteristics: It has relatively high mechanical strength, good chemical stability, and is resistant to acids, alkalis, salts, etc. It has good flame retardancy. By adding different plasticizers and other additives, it can be made into flexible PVC and rigid PVC. Flexible PVC is soft and elastic; rigid PVC is hard and has high rigidity.

- Applications: Flexible PVC is used for manufacturing the insulation layer of wires and cables, artificial leather, raincoats, toys, etc.; rigid PVC is used for manufacturing pipes, sheets, door and window profiles, building decoration materials, etc.

6. Polystyrene (PS)

- Characteristics: It has good transparency, glossiness, and processability, high rigidity, good dimensional stability, and excellent electrical insulation properties. However, it is brittle and has relatively low impact resistance.

- Applications: Commonly used in the manufacture of transparent plastic products, such as disposable tableware, water cups, stationery, optical instrument components, etc. It can also be used to make foam plastics, such as polystyrene foam boards for packaging.

7. Polyamide (PA, also known as Nylon)

- Characteristics: It has excellent mechanical properties, high strength, good toughness, excellent wear resistance and self-lubrication properties, good oil resistance and chemical resistance, and relatively high heat resistance.

- Applications: Widely used in the automotive, electronic and electrical, machinery, and other industries, such as manufacturing automotive engine peripheral components, gears, bearings, electrical connectors, wire and cable sheaths, etc.

8. Thermoplastic Polyester Elastomer (TPE)

- Characteristics: It has high strength, high elasticity, good fatigue resistance and chemical resistance, and its heat resistance is better than that of general elastomer. It can maintain good performance within a wide temperature range.

- Applications: Commonly used in automotive parts, such as seat belts, seat adjustment devices, door seals, etc.; in the electronic and electrical field, it is used for manufacturing wire and cable sheaths, elastic components of mobile phone chargers, etc.

9. Polymethyl Methacrylate (PMMA, also known as Acrylic Glass)

- Characteristics: It has extremely high transparency, with a light transmittance of over 92%. It has excellent optical properties, relatively high surface hardness, good weather resistance, and is not easy to age and turn yellow.

- Applications: Widely used in the fields of advertising light boxes, display racks, optical lenses, automotive tail light covers, building decoration materials, etc., for manufacturing various products that require high transparency and a good appearance.

10. Polyphenylene Sulfide (PPS)

- Characteristics: It has excellent high-temperature resistance and can be used continuously above 200℃. It has high mechanical strength, high rigidity, extremely strong chemical corrosion resistance, good electrical insulation properties, and self-extinguishing properties.

- Applications: Mainly applied in the fields of electronic and electrical, automotive, aerospace, etc., such as manufacturing packaging materials for electronic components, high-temperature-resistant sensor components, automotive engine compartment parts, etc.