Views: 0 Author: Site Editor Publish Time: 2025-04-04 Origin: Site
The common materials for engineering plastics are generally as follows:
ABS,PP,PC,AS,PS,PE,PPO,HIPS,PMMA,PVC,PC+ABS,GPPS,POM,PA,ASA,PBT,etc.
ABS Product Characteristics:
● Material & Surface
● Texture & Color: Matte or semi-gloss finish, commonly in ivory white or black; supports multi-color appearance via spraying.
● Structural Features:
Visible tiny gate marks (1-2mm diameter) at edges of injection-molded parts.
ABS Application Fields:
1. Automotive: Dashboard frames, air vent grilles, button panels (with anti-slip textures).
2. Electronics & Appliances: Router casings, socket panels, tool handles (anti-slip surface particles).
3. Industrial Components: Pipe joints, equipment protective covers, corrosion-resistant brackets.
POM Product Characteristics:
1. Core Properties
● High Rigidity & Strength: Elastic modulus of 3.1-3.5 GPa, tensile strength up to 70 MPa, and excellent bending strength, earning it the nickname "Super Steel" or "Steel Substitute" .
● Chemical & Weather Resistance: Resistant to solvents, weak acids/bases, and corrosion .
● Wear Resistance & Self-Lubrication: Low friction coefficient (0.21), ideal for oil-free lubrication scenarios (e.g., gears, bearings) .
● Wide Temperature Range: Long-term usability from -40°C to 100°C .
2. Molding Process
● Injection Molding: Primary method; mold temperature must be controlled (80-105°C) to minimize shrinkage (2%-3.5%)
3. Application：
● Automotive Industry: Gears, bearings, fuel pump housings (wear resistance, high-temperature tolerance) .
● Electronics & Appliances: Connectors, relay housings (high rigidity, dimensional stability) .
● Industrial Equipment: Pipeline valves, pump housings.
Polypropylene (PP) Product Characteristics & Applications
1. Physical Properties
● Lightweight & Low Density: Density ranges from 0.90–0.91 g/cm³, making it the lightest among common plastics.
● Low Water Absorption: Water absorption rate of 0.01%, ensuring excellent dimensional stability in humid environments.
● Surface Gloss: Smooth surface finish after molding, suitable for high-gloss applications (e.g., household items).
2. Mechanical Properties
● High Rigidity & Tensile Strength: Good tensile strength and rigidity, but prone to brittleness below -35℃.
● Fatigue Resistance: Ideal for cyclic loading applications (e.g., plastic hinges, containers).
3. Thermal Properties
● High-Temperature Resistance: Long-term use up to 100℃, short-term tolerance up to 150℃.
● Low-Temperature Brittleness: Brittle transition temperature at -35℃, limiting use in freezing conditions
4. Chemical Properties
● Chemical Corrosion Resistance: Resistant to weak acids, bases, oils, and solvents, but vulnerable to strong oxidizers (e.g., concentrated sulfuric acid).
5. Molding Process
● Injection Molding: Primary method; melt temperature 160–220℃, mold temperature controlled at 50–90℃ to minimize shrinkage (1%~2.5%).
● Mold Design: Optimize gate size (pin gate diameter ≥0.7mm) and venting structures to prevent warping or sink marks.
6. Application Fields
● Household Items: Food containers, tableware, toilet seats (glossy finish, antibacterial properties).
● Automotive Industry: Bumpers, interior parts (lightweight, chemical resistance).
● Packaging: Beverage bottles, films (low water absorption, heat resistance).
● Industrial Equipment: Pipes, valves (corrosion resistance, low density)
