Introduction
When you grab a coffee to-go, but don't feel burning, have you ever thought about what's between your hands and that hot liquid? The paper cup in your grip isn't just paper - it has an inner coating that prevents leaks, keeps temperature. In this article, YANGRUI will talk about the common coating types and how to choose the right one for your drinks business.
Why Paper Coffee Cups Need Coatings?
Without the coatings, the paper itself would quickly weaken and disintegrate when exposed to moisture or hot liquids. The coatings serve the paper cups with three functions:
• It creates a moisture barrier, preventing leaks and cup breakdown.
• By adding an extra layer, it maintains beverage temperature for longer.
• It also keeps the original structure of cups, preventing cup softening from condensation
Without these coatings, paper cups would fail their basic purpose within minutes of filling.
Main Types of Paper Cup Coatings
1. Wax-Coated Paper Cups
Wax-coated cups are the most traditional type, made with paper treated with food-grade paraffin wax. They are primarily used for cold beverages like iced drinks, milkshakes, and juices. However, they are not recommended for hot coffee, as the wax melts at 40 ~ 60°C (104 ~ 140°F). Most wax-coated cups are not recyclable through standard paper recycling due to difficulty separating the wax from the pulp. Some newer versions may carry a "BPI-Certified" label, indicating industrial compostability.
2. PE-Coated Paper Cups (Polyethylene)
PE-coated cups have a thin polyethylene plastic lining. PE is a tough, flexible thermoplastic that can withstand liquid temperatures up to 90°C (194°F), preventing leaks and grease absorption. However, PE-coated cups are challenging to recycle because polyethylene is non-biodegradable and must be fully separated from the paper-otherwise, it persists in landfills.
3. PLA-Coated Paper Cups (Polylactic Acid)
PLA linings are derived from renewable resources like cornstarch or sugarcane. These cups tolerate temperatures up to 85°C (185°F), are food-safe, and free of BPA and phthalates. PLA is also used in food containers and packaging. Compared to petroleum-based PE, PLA production consumes less energy and emits fewer greenhouse gases. However, PLA is more brittle than PE and degrades faster in humid conditions. It is biodegradable only in industrial composting facilities.
4. Water-Based Coated Paper Cups
These coatings blend natural materials (e.g., starch, cellulose) with synthetic polymers (e.g., acrylic, PLA). Suitable for both hot (up to 80°C / 176°F) and cold drinks, some variants are microwave-safe. Though less flexible than PE/PLA cups, water-based coatings are easier to recycle (no plastic separation required).
5. PHA-Coated Paper Cups (Polyhydroxyalkanoates)
PHA linings are made from bio-based polymers (e.g., derived from canola oil). They handle hot liquids (up to 90°C / 194°F) like PE and offer high durability. PHA is the most eco-friendly option, as it biodegrades in industrial/home composting and marine environments. Correspondingly, PHA-coated cups are the most expensive.
Which One is the Best for You?
|
Factor |
Wax |
PE |
PLA |
Water-Based |
PHA |
|
Max Temp |
Low (~40°C) |
High (~90°C) |
Medium (~85°C) |
Medium (~80°C) |
High (~90°C) |
|
Leak Proof |
Fair |
Excellent |
Good |
Good |
Excellent |
|
Recyclability |
Difficult |
Difficult |
Industrial compost |
Easier |
Home compost |
|
Cost |
Economic |
Moderate |
High |
Moderate |
Highest |
Quick Guide
✅ Cost-effective? → Wax or PE
✅ Hot beverages? → PE or PHA
✅ Eco-friendly? → PLA or PHA
✅ Easier recycling? → Water-based or PHA
Conclusion
Paper coffee cups come with various coating options, including PE, PLA, water-based coatings, PHA, and traditional wax. Which is the best coating depends on your needs. PE-coated cups are the most popular due to their flexibility, heat resistance, and affordability. However, if cost is less concern, PHA-coated cups may be suitable for those environmental protection users.
Custom PE-Coated Paper Cup Supplier
At YANGRUI, we produce durable and cost-effective PE-coated paper coffee cups. Our experts also provide OEM/ODM solutions for bulk paper cup buyers, including options for wall layers, sizes, and printed designs. If you're interested, contact us for free samples to test them with your beverages.