Virgin PET Bottle-Grade Resin Suppliers
Source virgin polyethylene terephthalate (PET) bottle-grade resin from verified B2B suppliers on Towobo. PET bottle resin is the primary raw material for stretch blow moulded bottles used in water, carbonated soft drinks, juices, edible oils, personal care, and pharmaceutical packaging. This guide explains intrinsic viscosity (IV) selection, colour and brightness specifications, food-grade certification requirements, and how to compare PET resin suppliers.
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Browse PET Resin Suppliers on Towobo →Intrinsic viscosity — the key specification for bottle-grade PET
Intrinsic viscosity (IV), measured in dl/g, is the most important specification for bottle-grade PET resin. IV reflects the molecular weight and chain length of the polymer — higher IV means higher molecular weight, greater melt strength, and better mechanical performance in the finished bottle. The standard IV range for PET bottle resin is 0.72–0.86 dl/g. Water and still beverage bottles (single-use, lower pressure resistance required): 0.72–0.78 dl/g. Carbonated soft drinks (CSD) bottles (must withstand internal CO2 pressure): 0.78–0.84 dl/g. Hot-fill bottles (must resist distortion at filling temperatures): 0.80–0.86 dl/g. Large bottles (5L and above): higher IV (0.80–0.86 dl/g) for adequate melt strength during blow moulding. Specifying the wrong IV for your preform and blow moulding process results in inconsistent wall thickness distribution, haze, and bottle failure. Always confirm the IV specification with your preform toolmaker and blow moulding machine supplier.