Protect reaction stability
Control moisture to reduce variability in transesterification and downstream polymerization.
PBT APPLICATION
DMT for stable PBT production
PBT performance depends on more than headline purity. Moisture, acid value, color and trace impurities influence process stability and final resin quality.
OVERVIEW
Qualification priorities
Translate polymerization risks into measurable feedstock controls.
Monitor hydrolysis-related risk
Use acid value with moisture and storage history, rather than as an isolated metric.
Protect color and performance
Evaluate ash, metals and organic trace impurities against resin requirements.
Validate across batches
Compare representative samples and shipment COA data before recurring supply.
REFERENCE
Key product information
- Recommended starting grade
- Polyester Grade DMT
- Key controls
- Moisture, acid value, color, ash and trace impurities
- Validation
- Lab or pilot polymerization trial
- Supply progression
- Sample to pilot lot to recurring contract
PROJECT CHECKLIST
What to confirm
Define target resin and process routeReview a representative COAComplete sample or pilot validationLock specification and batch release process
FAQ
Frequently asked questions
Which DMT grade is recommended for PBT production?
Polyester-grade DMT is the usual starting point for PBT. A typical batch profile is purity ≥ 99.95% (GC), moisture ≤ 0.02%, acid value ≤ 0.06 mg KOH/g and melting point 140–141 °C. The shipment-specific COA is always the authoritative reference.
Why do moisture and acid value matter so much in PBT?
Excess moisture and acidic species disturb transesterification and downstream polycondensation — they affect catalyst efficiency, end-group balance and molecular-weight stability. Reviewing both values together with storage history gives a more reliable risk picture than either number alone.
How do we qualify a new DMT source for an existing PBT line?
A staged path works best: review a representative COA against your current material, run a lab or pilot polymerization with a sample, then compare batch data across the first shipments before committing to recurring supply.
What packaging and documentation are available for PBT customers?
Standard options are 25 kg bags and jumbo bags, with project-specific packaging on request. Every shipment carries a batch COA; SDS/MSDS, TDS and export documents are provided as needed, and commercial questions are answered within 48 hours.
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Turn your requirements into a supply plan
Share your application, target specification, volume and destination — we’ll recommend the next practical step and arrange COA or samples.