What Is the Pyrolysis Temperature for Tires and Plastics?

Many plastics soften or melt before active cracking begins. This change often starts between 120°C and 250°C, depending on the resin.
Films, woven bags and thin packaging may melt quickly. The feeding and pyrolysis reactor systems must prevent agglomeration, wall sticking and local overheating.
Uniform shredding and stable feeding improve heat transfer during this stage.

PE-, PP- and PS-rich materials usually produce significant oil vapor between 350°C and 500°C.
However, each resin behaves differently:

• PE may produce more wax.
• PP often generates oil and combustible gas.
• PS can produce aromatic-rich liquid products.
• PVC releases chlorine-containing gases and needs strict control.
• PET usually offers limited oil recovery.

Mixed plastics create wider temperature and product variations. Sample testing can reveal likely oil yield, gas volume, wax content and residue quality.

No. Excessive heat does not automatically increase oil production.
Higher temperatures may accelerate secondary cracking, producing more gas and less recoverable liquid. They can also increase energy use and place greater pressure on the condensation system.
The waste pyrolysis plant should maintain a balanced temperature curve instead of pursuing the highest possible setting.