Polyolefin Prices Ascend: Q3 Market Dynamics and Supply Constraints

The third‑quarter resin pricing trend diverges across the five high‑volume commodity resins. Demand remains robust while supply constraints keep polyethylene (PE) and polypropylene (PP) prices firm. Polystyrene (PS) is finally easing as feedstock costs ease, and PVC and PET have reached a temporary peak.

These observations come from seasoned purchasing consultants at Resin Technology, Inc. (RTi) in Fort Worth, senior editors of PetroChemWire (PCW), and Plastics Exchange CEO Michael Greenberg.

Key challenges include the return of reliable resin import flows—once disrupted by container logistics and weather—and the expected hurricane season, which could further strain supply. Suppliers are building inventory buffers, but the tight market leaves little room for error, especially for polyolefins.

Polyethylene Prices Continue to Rise

PE prices increased 5¢/lb in June, with another 5¢/lb hike anticipated for July due to high demand and lingering supply disruptions. If July’s increase is implemented, total year‑to‑date gains would reach 41¢/lb for HDPE and 43¢/lb for LL/LDPE.

RTi’s Mike Burns notes that inventories are growing, yet the market remains solid through Q3. He warns that a major unplanned disruption could upset the delicate balance, especially given the 40% overcapacity that typically feeds exports. Burns projects that a 90‑day period of uninterrupted production is needed to restore equilibrium.

PCW editor David Barry expects August prices to plateau as container logistics normalize and imported finished goods begin to flow. All observers agree that spot PE remains firm, with injection grades particularly tight.

Polypropylene Prices Remain Volatile

PP prices rose 12¢/lb in June, split between a 4¢/lb move with monomer costs and an 8¢/lb non‑monomer increase. RTi’s Scott Newell predicts further margin hikes of 3‑5¢/lb for July and August, reflecting ongoing supply tightness and logistical bottlenecks.

PCW notes that while PP import volumes have risen, container shortages in Asia and high freight rates still constrain availability. Newell highlights labor shortages that have forced some processors to cut capacity to 75‑80%, adding to backlogs.

Polystyrene Prices Decline

PS saw its first price drop in nearly three years, falling 8¢/lb in June after a prolonged 57¢/lb increase since May 2020. Feedstock reductions—benzene down $1/gal, ethylene down 9¢/lb, styrene down 10¢/lb—have driven this reversal.

RTi and PCW anticipate further erosion in July, with PS prices potentially dropping 9‑10¢/lb if benzene contracts remain low. Demand in packaging, medical, and construction sectors remains subdued.

PVC Prices Peak

PVC prices edged up 1.5–3¢/lb in June as suppliers aimed for a 3¢ increase. Mark Kallman and PCW’s Donna Todd report no new hikes for July, suggesting a stabilization after a peak driven by falling ethylene prices and modest chlorine cost increases.

They predict flat pricing in August, with improved inventory levels helping to balance supply and demand.

PET Prices Hold Steady

PET prices appear flat entering July, with surcharges ranging from 2–4¢/lb inconsistently applied. RTi’s Kallman notes that feedstocks like paraxylene and PTA have been stable, allowing for a modest 0.5¢/lb increase by July’s end, but potential declines in August if costs fall.

The market remains tightly balanced, with processors meeting needs but not excess supply. Import volumes are slowing due to container constraints, likely persisting into Q4.