HIPS stands for high impact polystyrene, a rigid thermoplastic made by adding rubber to polystyrene to improve toughness. It is used for vending cups, yoghurt pots, refrigerator liners, signage and thermoformed packaging, and carries resin identification code 6.
HIPS is a solid, rigid sheet material; EPS is expanded polystyrene foam, which is roughly 98% air. They look and behave very differently, are recycled through separate routes, and should never be mixed in the same load.
Thermoforming skeletal waste and offcuts, purge, rejected mouldings, vending cups and yoghurt pots, refrigerator and appliance liners, signage and display board, and roll-stock sheet.
Recycled HIPS goes back into thermoformed packaging, plant pots and horticultural trays, coat hangers, signage, appliance components and injection moulded parts.