Material Insights · Understanding the Material World

PET resin and Purified terephthalic acid

PTA is one of PET's two building blocks, joined with MEG and then solid-stated into bottle resin, so PET bottles are a direct, steady outlet for PTA. India now protects bottle-grade PET with a $200.66 a tonne duty on Chinese resin while buying more Chinese PTA, which tends to support domestic resin makers' margins.

PET resin (chemical) and Purified terephthalic acid (chemical): 4 relationships.

How they are linked

1. PTA plus MEG make PET

Physical flow · Strong · PTA to PET resin

PET is made by esterifying PTA with MEG and polymerising the result; bottle grades then go through solid-state polymerisation to raise molecular weight.

The melt-phase step runs through esterification, prepolymerisation and polycondensation reactors, and unreacted MEG is recovered. By the chemistry a tonne of PET needs about 0.86 t of PTA and 0.32 t of MEG, before losses. Bottle grades then pass through a solid-state reactor in which molecular weight rises, the step that gives bottle resin its strength.

Sources: Intratec

2. Price link: product

Cost and price · Strong · Both ways

PET bottle resin is a large PTA outlet, so drinks demand and recycling rates affect PTA, and PTA cost sets the resin floor.

  • 0.38 monthly change correlation
  • 0.73 12-month change correlation
  • 1.14 fitted elasticity

Monthly moves correlate at 0.38 and yearly at 0.73. The fitted elasticity above 1 means the resin proxy moves slightly more than PTA in percentage terms, as resin margins widen and narrow with the cycle.

Sources: Material Insights (World Bank, FRED, IMF data)

3. China capacity in both

Geography and ownership · Strong · Both chains centred on China

China leads new capacity in both PTA and PET, so its operating rates set world prices for both.

  • 22.4 Mt/yr PTA capacity China was set to add, 2024 to 2028
  • about 75% China PET operating rate, second half of 2025

New Chinese PET lines include 600 kt/yr from Shandong Fuhai and 400 kt/yr from Koksan in Nantong. ResourceWise put profitability at or near zero across polyester products in late 2025.

Sources: GlobalData; ResourceWise

4. India duties: resin taxed, PTA open

Policy · High in India · Duty on Chinese PET, freer PTA imports

India places anti-dumping duty on Chinese bottle-grade PET but removed its quality order on PTA, so domestic resin makers get cheap feed and protected sales.

  • $200.66/t anti-dumping duty on Chinese bottle-grade PET, five years from 19 June 2026
  • 1.95 Mt India PTA imports, January to November 2025

The duty, first imposed in 2021 at $15.54 to $200.66 a tonne and continued in June 2026 after a sunset review, covers resin of 0.72 dl/g or more and excludes recycled PET. India's PTA imports were up 9.1% in January to November 2025, and Chinese shipments nearly doubled after the quality control order was revoked late that year.

Sources: Ministry of Finance, India (via World Trade Scanner); WKAI Global; S&P Global Commodity Insights

For investors

Key learnings

  1. PET resin and PTA share one polyester cycle, with a yearly price correlation of 0.73.
  2. Chinese overcapacity kept PET plants at about 75% and polyester margins near zero in late 2025.
  3. In India, cheaper imported PTA plus a $200.66/t duty on Chinese PET tends to widen domestic resin makers' conversion margin.

What to track

  • PET bottle resin price minus PTA and MEG cost: Conversion margin for resin makers (Weekly · CCF, Platts)
  • India PET resin imports by origin: Effect of the 2026 duty (Monthly · DGCI&S)
  • China PET operating rate: Oversupply signal (Weekly · CCF)

For policymakers

Key learnings

  1. A duty on PET resin but not on PTA protects the resin step while keeping feed cheap; bottlers and brand owners pay the higher resin price.
  2. The duty applies only to bottle grade resin of 0.72 dl/g or more and leaves recycled PET out, so recycled resin competes free of it.
  3. India imported about 2 Mt of PTA in 2025; GAIL's planned 1.25 Mt/yr unit is the main domestic addition in view.

What to track

  • DGTR reviews on PET and PTA: Changes in trade remedies (Event-driven · DGTR, CBIC)
  • India PTA imports: Feedstock reliance (Monthly · DGCI&S)

India

India imported 1.95 Mt of PTA in January to November 2025 and applies a $200.66 a tonne anti-dumping duty on Chinese bottle-grade PET for five years from June 2026, with recycled PET excluded.

Sources

  1. Polyethylene terephthalate production from MEG and PTA (polycondensation): cost report, Intratec
  2. Notification No. 12/2026-Customs (ADD): PET resin from China, Ministry of Finance, India (via World Trade Scanner) (2026)
  3. India confirms continuation of anti-dumping duties on Chinese PET resin after first sunset review, WKAI Global (2026)
  4. Asian PTA producers under pressure as India laps up Chinese supply, S&P Global Commodity Insights (2026)
  5. Price correlation, Material Insights, Material Insights (World Bank, FRED, IMF data)
  6. China to spearhead global PTA capacity additions through 2028, GlobalData (2024)
  7. PET and raw materials: 2025 review and 2026 outlook, ResourceWise (2025)