Classification and Overview of Materials Used in Anti-Theft Plastic Bottle Caps
1. Polyethylene (PE)
- Types: Mainly HDPE (High-Density Polyethylene) and LDPE (Low-Density Polyethylene).
- Characteristics:
- Good chemical resistance and impact strength.
- HDPE offers higher rigidity, while LDPE provides better flexibility.
- Cost-effective and widely used for water and beverage bottles.
- Applications: Common in milk jugs, water bottles, and non-carbonated drink caps.
2. Polypropylene (PP)
- Characteristics:
- Excellent heat resistance (suitable for hot-fill liquids).
- Good fatigue resistance, making it ideal for twist-off caps.
- Higher rigidity than PE but less flexible.
- Applications: Widely used in juice bottles, condiment caps, and pharmaceutical packaging.
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