PET Resin
The PET (Polyethylene Terephthalate) resin supplied by Chelora Chemicals — a semi-crystalline polyester combining clarity, strength and gas-barrier properties — exported from Indonesia as virgin pellet with full batch documentation on every shipment.
What PET Resin is, and why buyers source it
A working overview of the resin's polyester chemistry, how intrinsic viscosity governs its end use, and the grades Chelora Chemicals keeps in regular supply.
PET is a semi-crystalline polyester formed by condensing a diacid (or its dimethyl ester) with ethylene glycol, producing a repeating ester linkage along the backbone that gives the polymer both strength and, importantly, an excellent gas-barrier property against oxygen and carbon dioxide — the single property that has made it the dominant resin for carbonated beverage bottles. Its degree of crystallinity, controlled during processing rather than fixed by the resin itself, determines whether a given part is clear and glassy (low crystallinity, as in a blow-moulded bottle) or opaque and stiffer (higher crystallinity, as in some engineering and fibre applications).
At room temperature it is supplied as a clear to semi-opaque crystalline pellet or chip. Because it is strongly hygroscopic and undergoes hydrolytic degradation (chain scission by reaction with absorbed moisture) at melt-processing temperature, it must be thoroughly dried immediately before processing — a handling requirement distinct from almost every other resin in this catalogue.
Where it fits in the value chain
Bottle-grade PET, at a moderate intrinsic viscosity, is stretch-blow-moulded into carbonated soft drink, water and food bottles, exploiting its clarity, barrier properties and recyclability. Fibre-grade PET, at a lower intrinsic viscosity, is melt-spun into polyester fibre for textiles and nonwovens — one of the highest-volume synthetic fibres in the world. Film and sheet grades are biaxially oriented into packaging film, photographic and industrial film base, and electrical insulation tape. A separate family of higher-performance engineering PET grades, often glass-reinforced, is injection-moulded into electrical connectors and automotive under-the-hood parts.
Grades we supply
Chelora Chemicals offers PET across bottle, fibre, film/sheet and engineering intrinsic-viscosity ranges. Each grade is supplied with a batch-wise certificate of analysis covering intrinsic viscosity, moisture content and acetaldehyde level (for bottle-grade material).
How PET Resin is produced
An overview of the production route for orientation purposes. Our manufacturing partners' own process parameters and in-process controls are proprietary and are not disclosed beyond what is needed to interpret the certificate of analysis.
PET is produced by one of two condensation routes, both ending in the same polymer. The direct esterification route reacts purified terephthalic acid directly with ethylene glycol under heat, releasing water as the by-product and building up an oligomer that is then polycondensed under vacuum at high temperature, with excess glycol removed, to build the final molecular weight. The older transesterification route instead starts from dimethyl terephthalate, reacted with ethylene glycol to release methanol rather than water, before the same final polycondensation step builds up molecular weight; direct esterification using purified terephthalic acid is now the dominant commercial route worldwide.
The polycondensation step's final stage, solid-state polymerisation, is used for higher-intrinsic-viscosity bottle-grade resin: after initial melt polymerisation, the still-solid pellets are heated under vacuum or inert gas below their melting point for an extended period, allowing molecular weight to build further without the side reactions that would occur if the same build-up were attempted in the melt. A catalyst, most commonly an antimony compound, is used throughout to accelerate the polycondensation reaction.
Industries and processes that use it
PET is consumed across beverage and food packaging, textile fibre, film and engineering applications. The fields below account for most of the demand we see through our export desk.
Beverage & Food Bottles
Stretch-blow-moulded into carbonated soft drink, water and food bottles, exploiting the resin's clarity, gas-barrier properties and recyclability.
Polyester Fibre & Textiles
Melt-spun into polyester fibre for apparel, home textiles and technical nonwovens, one of the highest-volume synthetic fibres produced worldwide.
Packaging & Industrial Film
Biaxially oriented into packaging film, photographic and industrial film base, and electrical insulation tape.
Engineering & Electrical Parts
Glass-reinforced engineering grades injection-moulded into electrical connectors, automotive under-the-hood parts and technical components.
How the resin is typically converted forward
The resin's hygroscopic nature and controllable crystallinity govern almost all of PET's further processing behaviour. The categories below account for most of the ways it is converted into a finished part.
Drying
The hygroscopic resin is dried to a very low residual moisture level immediately before melt processing to prevent hydrolytic chain scission at processing temperature, an essential first step for every conversion route.
Injection Stretch-Blow Moulding
A preform is injection-moulded, then reheated and biaxially stretched and blown inside a bottle mould, which orients the polymer chains and induces the strain-hardening that gives finished bottles their strength and clarity.
Fibre Spinning
Melted resin is extruded through fine spinnerets and drawn to orient the polymer chains, producing continuous filament or staple fibre for textile use.
Biaxial Film Orientation
Cast film is stretched in both the machine and transverse directions at a controlled temperature, aligning the polymer structure to give high-strength, dimensionally stable oriented film.
PET Resin against its feedstock monomers we supply
Buyers sourcing PET resin often also need the diacid feedstock it is condensed from, for their own in-house polymerisation. A quick reference to what else is on our regular supply list.
| Product | CAS Number | Category | Notes |
|---|---|---|---|
| PET Resin | 25038-59-9 | Aromatic polyester | The product on this page — a clear, strong, gas-barrier polyester resin. |
| Purified Terephthalic Acid | 100-21-0 | Aromatic diacid monomer | The dominant direct-esterification feedstock this resin is condensed from — see its product page. |
| Dimethyl Terephthalate | 120-61-6 | Aromatic diester monomer | The alternate transesterification-route feedstock for this resin — see its product page. |
| Monoethylene Glycol | 107-21-1 | Glycol monomer | The glycol co-monomer condensed with the diacid/diester to form this resin's polyester backbone. |
Exact physical constants and processing specifications are confirmed per batch on the certificate of analysis — treat the notes above as a sourcing guide, not a specification sheet, for products other than PET Resin. Monoethylene glycol is listed for reference only and is not currently a standalone catalogue item; please ask our desk for availability.
Safety classification at a glance
Based on GHS classification as commonly listed for this substance. This is a summary for orientation only — always work from the current safety data sheet supplied with your specific batch.
Not classified as hazardous under GHS in solid pellet/chip form.
Combustible; pellets and especially fine dust can support combustion once ignited.
Minimise accumulation of polymer dust/fines, which present a greater ignition risk than pellets.
Processing equipment handles the resin molten; standard hot-surface and fume-extraction precautions apply at the extruder.
Standard gloves and eye protection are sufficient for routine handling of pellets.
Not a safety hazard, but a critical process-quality factor; always dry before processing per the technical data sheet.
Not classified; refer to the batch MSDS for grade-specific guidance.
This product has a low hazard profile in its solid pellet or chip form and is not classified as hazardous under GHS. The principal handling precautions concern combustible-dust accumulation from fines generated during conveying and bagging, and standard hot-surface precautions during melt processing. Full first-aid, storage, spill and PPE guidance is in the MSDS issued with every shipment, and should be read in full before this material is handled.
Keeping it on spec between delivery and use
General storage guidance for this grade. Site-specific storage rules, segregation requirements and re-test intervals should follow your own EHS procedures and the MSDS issued with your batch.
Store in a dry, ambient-temperature warehouse in the original moisture-barrier packaging, since PET is strongly hygroscopic and will absorb atmospheric moisture through standard polyethylene bags over time. Keep bags sealed until immediately before processing, and always pre-dry per the technical data sheet regardless of how recently the material was delivered, since even a few hours of exposure to humid air can raise moisture content enough to affect finished-part properties. Re-check intrinsic viscosity on material held past its retest date before use.
How it ships from Indonesia
Standard packing and export terms for this product. Confirm exact figures against your order — they vary slightly by destination and quantity.
What travels with every batch
Specification is agreed before the purchase order, not discovered on arrival. Every shipment of PET Resin leaves with a documented, checkable paper trail.
Certificate of Analysis
Batch-wise assay, colour and key physical constants, issued against the agreed specification so your QC team can check it, not just file it.
Safety Data Sheet
GHS-format SDS in English covering hazard classification, handling, storage, first-aid and spill response for the exact grade shipped.
Technical Data Sheet
Reference physical and chemical properties, recommended storage and typical applications, for internal circulation to your process or R&D teams.
Certificate of Origin
Confirms Indonesian origin for customs clearance and any preferential-duty claim at your destination port.
Dangerous Goods Declaration
UN packing group, classification and shipper's declaration prepared ahead of loading so documentation never holds up customs.
Third-Party Inspection
Independent pre-shipment inspection and re-sampling can be arranged on request, at your cost, for buyers who require it as a matter of policy.
Frequently asked questions
What buyers most often ask our sales desk about this grade.
01What is PET Resin used for?+
02What does PET stand for and what is it made from?+
03How is PET Resin produced?+
04What grades does Chelora Chemicals supply?+
05Is PET Resin hazardous?+
06Why must PET always be dried before processing?+
07What packing options are available?+
08How long does delivery take?+
09Can I get a sample before placing a bulk order?+
10Do you supply the diacid feedstocks as well?+
Need PET Resin on spec, on time?
Send us your required intrinsic viscosity, grade (bottle/fibre/film/engineering), quantity and destination port. Our desk quotes most enquiries within one working day.