Why Double - Laminated Paper Cup Paper Is Suitable for Ice Cream Cups

1. Enhanced Moisture & Cold Resistance

Double PE lamination forms a dense barrier:

• The inner PE layer (20–30μm thickness) directly contacts ice cream, preventing moisture absorption that causes paper softening. It reduces water vapor permeability by 70% compared to single lamination, keeping the cup rigid even at -18°C.

• The outer PE layer resists condensation from cold ice cream. When the cup holds -5°C ice cream, the outer surface remains dry (dew point ≤10°C), avoiding slippery hands or tabletop water accumulation.

2. Structural Stability in Low Temperatures

• PE laminates maintain flexibility at low temperatures (glass transition temperature ≤-50°C), preventing brittleness or cracking. The double - layer structure increases tensile strength by 40% at 0°C, ensuring the cup withstands scooping forces without deforming.

• The laminated layers bond tightly via heat sealing (150–180°C during lamination), resisting delamination even when exposed to repeated temperature fluctuations (e.g., from freezer to room temperature).

3. Hygiene & Food Safety Compliance

• Food - grade PE laminates (compliant with FDA 21 CFR 177.1520) prevent plasticizer migration into ice cream. Testing shows migration levels <0.1 mg/kg, far below safety limits.

• The smooth, non - porous surface resists bacterial adhesion. A 24 - hour contact test at 4°C shows microbial growth ≤10² CFU/cm², meeting food packaging hygiene standards.

4. Release Properties for Easy Serving

• The PE surface has low surface energy (30–35 dynes/cm), allowing ice cream to slide off easily without sticking. This improves scooping efficiency and reduces residue, enhancing consumer experience.

• Double lamination ensures uniform release across the cup surface, preventing uneven melting or sticking that occurs with single - layer cups.

5. Design Flexibility for Cold Applications

• The laminated paper supports embossing or texturing (e.g., anti - slip patterns) on the outer layer, improving grip for cold products. Embossed designs increase friction by 30%, reducing the risk of dropping.

• It enables high - quality offset printing (ink adhesion ≥4N via cross - hatch test) for vibrant branding, even on cold surfaces where ink might otherwise flake.

6. Leakage Prevention Under Freezing Conditions

• PE laminates expand/contract with temperature changes (coefficient of thermal expansion: 150×10⁻⁶/°C), maintaining a tight seal. Pressure testing at -10°C shows no leakage under 50kPa of internal pressure, suitable for filled ice cream cups.

• The double - layer structure reinforces seam integrity, preventing cracks at the cup’s bottom or side seams that could form in single - layer designs.