Molded Pulp Insulated Liners for Cold-Chain Shipping: Passive Thermal Protection for Perishables

Cold-chain shippers traditionally use EPS coolers that are bulky, non-recyclable, and hard to dispose of. Molded pulp insulated liners use thick, low-density pulp walls to slow heat transfer, providing passive thermal hold for meal kits, pharma, and perishables with a recyclable footprint.

The Scenario: Three challenges in cold-chain insulation

Cold-chain insulation faces three challenges:

Pain Points

• Perishables need temperature hold for 24–72 hours, so the liner must slow heat transfer;
• EPS coolers are bulky and non-recyclable, adding shipping and disposal cost;
• Condensation from temperature swings can soften packaging and weaken structure.

The Solution: Three molded-pulp insulation solutions

Molded pulp offers three solutions for cold-chain shipping:

1. Thick low-density pulp walls Low-density pulp walls trap air to slow heat transfer, giving passive thermal hold.

2. Recyclable liner structure All-pulp liners replace EPS coolers with a curbside-recyclable alternative.

3. Moisture-resistant treatment Water-resistant coating handles condensation so the liner stays strong through temperature swings.

The Result: Temperature held, waste reduced

With these solutions, perishables hold temperature in transit while packaging waste falls. Molded pulp liners match cold-chain brands' sustainability commitments.