PET and PBT resin supplier: bottle, sheet and fiber PET by IV, unfilled, glass-filled and FR PBT
We source PET for bottles, sheet, fiber and strapping, matched by intrinsic viscosity (IV), and PBT and glass-filled PET for connectors, housings and under-hood parts, from one gaylord (about 1,000 to 1,600 lb) to a railcar. Send the grade you run, or its IV, glass level and flame rating, and a polymer chemist reviews it and quotes a match or a qualified equivalent.
One gaylord to a railcar · A polymer chemist reviews every quote · Every prime lot from our suppliers ships with a COA
Updated October 2026
Request a Quote- Impact strength
- Moderate (modified: good)
- Clarity
- Clear (PET) to opaque
- Chemical resistance
- Good
At a glance
- Form
- Pellets
- Order size
- One gaylord to a railcar
- Grades
- Unfilled PBT · Glass-filled PBT (15-50%) · FR PBT for electrical · Glass-filled PET (30-45%)
- Paperwork
- Supplier COA on every prime lot
- Ships to
- U.S. and Canada
- Sourcing
- Matched to your spec
The short answer
PBT is the polyester for connectors, sensor housings and other electrical parts that need fast cycles and steady dimensions in humid air. Glass-filled PET is stiffer and takes more heat, and suits structural parts and housings. The thing that most often goes wrong is drying: wet polyester molds into parts that look perfect and then crack in service, because water at melt temperature cuts the polymer chains.
For PBT with 15 to 30% glass for connectors and sensor housings, see the glass-filled PBT supplier page.
Grades we source
Tap a grade to add it to your quote request.
About PET / PBT
PBT crystallizes fast for short molding cycles and excels in electrical and automotive components; glass-filled PET delivers higher stiffness and heat performance at attractive cost. Both absorb far less moisture than nylon, so dimensions and electrical properties stay stable in humid service.
Common applications
- Electrical connectors and bobbins
- Automotive electrical housings
- Under-hood sensors and components
- Appliance and power-tool parts
- Structural brackets
Typical properties
| Impact strength | Moderate (modified: good) |
|---|---|
| Heat (HDT @ 1.8 MPa) | ~55–65°C unfilled PBT · ~205°C PBT GF30 · ~225°C PET GF30 |
| Clarity | Clear for bottle, sheet and film PET; opaque for PBT and glass-filled grades |
| Chemical resistance | Good |
| Relative cost | Moderate |
Property ranges are general guidance and vary by grade and supplier; a polymer chemist confirms the exact spec against the data sheet and certificate of analysis for your application.
Full data sheet values: PBT GF30 properties · PET GF30 properties
Which grade to ask for
Choose PBT or PET first, then the glass level, then the flame and hydrolysis package.
| Grade type | Use it for | Watch out for |
|---|---|---|
| Unfilled PBT | Small connectors, housings, extruded buffer tubes | Notch-sensitive; rated HB unless it is an FR grade |
| PBT GF15–30 | Connectors, sensor housings, coil bobbins | Warp varies by supplier: the cross-flow to flow shrinkage ratio runs from about 1.3:1 to 3.7:1 |
| FR PBT (halogenated or halogen-free) | Relay, switch and electrical housings | UL recognition is grade-specific and color-specific |
| Hydrolysis-resistant PBT | Under-hood connectors in heat and humidity | Standard PBT loses strength in hot, humid service |
| Impact-modified PBT and PBT blends | Housings that need toughness | Blend ratio changes shrinkage and chemical resistance |
| PET GF30–45 | Stiff structural, appliance and power-tool parts | Needs a hot mold to crystallize |
| PBT/PET glass-filled blends | Housings that want PET stiffness and gloss with easier molding | Check the blend ratio against your current grade before switching |
Typical starting points. Grades vary, so confirm on the data sheet for the exact grade.
Grade finder: start from what you make
Pick your process, find the row for your product, and tap Quote this to add it to the form. PET is matched by IV in dL/g, so compare grades measured the same way. ASTM D4603 measures the inherent viscosity of PET at 0.50% in 60/40 phenol/1,1,2,2-tetrachloroethane in a glass capillary viscometer at 30°C / 86°F, and IV is usually calculated from that result. Some producers use a different solvent and temperature, which can shift the number slightly. PBT is usually matched by MVR or viscosity number.
| Product | Grade family | Typical window | Put on the RFQ | |
|---|---|---|---|---|
| Water bottles and general beverage bottles | Bottle-grade PET copolymer, solid-state polymerized and crystallized | IV about 0.72–0.80 dL/g (ASTM D4603 or the producer’s method); acetaldehyde in chip often specified at about 1 ppm or less; chips shipped crystallized | Acetaldehyde in the chip and whether you need a low-AA water grade, the reheat additive your blow molder needs, and the producer’s FDA letter. Packaging › | |
| Carbonated soft drink (CSD) bottles | Higher-IV bottle-grade copolymer | IV about 0.80–0.86 dL/g (ASTM D4603 or the producer’s method) | Fast-reheat or standard grade, the copolymer type, and your creep and burst tests. A lower-IV water grade is not a drop-in for CSD. Packaging › | |
| Hot-fill juice, tea and sports drink bottles | Hot-fill bottle grade, often a low-copolymer resin that crystallizes faster | IV about 0.76–0.82 dL/g; used with a heat-set blow molding process | Your fill temperature and the heat-set process. Hot-fill grades are chosen to crystallize well during heat-setting, so match the grade family, not just the IV. Packaging › | |
| Edible oil, household chemical, personal care and wide-mouth jars | General-purpose bottle grade | IV about 0.76–0.82 dL/g (ASTM D4603 or the producer’s method) | Clarity and color (b*), whether you add PCR, and the producer’s FDA letter for food or the documents your brand owner asks for. Personal care packaging › | |
| 5-gallon water jugs, refillable and thick-wall containers | High-IV bottle grade | IV about 0.84–0.90 dL/g | Wall thickness, how the preform is molded (thick walls haze if they crystallize), and the wash and refill cycles the container must survive. Packaging › | |
| APET clamshells, blister packs and food trays | Bottle or sheet grade PET, often blended with rPET | IV about 0.76–0.84 dL/g; crystallized chips that must be dried before extrusion | Sheet gauge, the share of edge trim and rPET flake you add, antiblock and the producer’s FDA letter. Packaging › | |
| CPET ovenable trays | Crystallizable PET with a nucleating package | Higher-IV PET plus a nucleator added in sheet extrusion; base resin IV set by the grade, often about 0.90–1.05 dL/g | Oven temperature the tray must survive, the nucleator system you use, and the producer’s FDA letter for the oven use. Food containers › | |
| PETG sheet, displays and medical packaging | Glycol-modified copolyester (amorphous) | Specified by the producer’s grade, not by bottle IV windows. PETG does not crystallize, so it dries at about 65°C / 150°F, not at PET temperatures | The exact grade and whether you need medical or food documents. PETG and PET cannot be swapped for each other. Clear parts › | |
| Staple fiber and textile filament | Fiber-grade PET chips, bright or semi-dull | IV about 0.60–0.68 dL/g; usually melt-phase chips, often amorphous | Bright, semi-dull or full-dull (TiO2 level), DEG and carboxyl end groups, and the chip size your extruder feeds. Amorphous chips need crystallizing before hot drying. Film, bags and liners › | |
| BOPET film | Film-grade PET chips, often super bright | IV about 0.60–0.66 dL/g | Antiblock (silica) loading, oligomer level, and color. Film lines are sensitive to gels and specks. Film, bags and liners › | |
| Industrial yarn, tire cord, seat belts and webbing | High-IV PET, solid-state polymerized | IV about 0.90 dL/g or higher in the finished yarn, so the chip is usually supplied higher, often near 1.0 dL/g | The IV after your extrusion step, carboxyl end groups for heat and hydrolysis life, and lot-to-lot IV spread. Industrial and equipment › | |
| PET strapping and monofilament | High-IV PET, often recycled flake upgraded by solid-state polymerization | IV often about 0.80–0.95 dL/g, set by the strap strength you need | The IV and its spread lot to lot, rPET content, and color. Strap strength falls fast if IV drops in processing. Recycled resin › | |
| Small connectors, switch parts and housings (unfilled) | Unfilled PBT injection grade | MVR about 8–50 cm³/10 min (250°C / 482°F, 2.16 kg, ISO 1133), or viscosity number about 105–165 ml/g (ISO 1628-5) | Which flow measure your data sheet uses, color and laser marking, and whether the part needs a UL 94 rating. PBT vs. PET › | |
| Relay, switch and appliance housings needing V-0 | Flame-retardant PBT, unfilled or glass-filled | UL 94 V-0 at the thickness and color listed on the grade’s UL file; the minimum listed thickness, CTI and glow-wire values vary by grade | Halogen-free or brominated, your minimum wall, CTI class, glow-wire (GWIT and GWFI) if your appliance standard calls for them, and the UL file. Choosing an FR grade › | |
| Headlamp bezels and reflectors that are metallized | Unfilled or lightly filled PBT made for direct metallizing, low outgassing | Surface quality and fogging (outgassing) set by the OEM spec, for example a fogging test at a stated temperature and time; MVR at 250°C / 482°F and 2.16 kg set by the grade | The OEM material spec, the fogging test and its limit, whether the part is vacuum metallized without a base coat, and the peak temperature near the lamp. Automotive › | |
| Exterior trim, mirror housings and door handles | Impact-modified PBT or PBT blends (PC/PBT, PBT/ASA) | Cold notched impact, often at −30°C / −22°F, plus paint or UV needs, set by the OEM spec. The blend ratio sets shrink and chemical resistance | The OEM spec, painted or molded in color, cold impact, and the fuel and cleaner tests. Do not swap blend types without a tool trial, since shrink differs. Automotive › | |
| Connectors, sensor housings and coil bobbins | PBT with about 15–30% glass fiber | Glass about 15–30% by ash (ISO 3451 or ASTM D5630); MVR at 250°C / 482°F and 2.16 kg set by the grade, so compare it on the data sheet | Glass level, warp across the part (low-warp grades exist), and hydrolysis resistance if the part sees heat and humidity. Glass-filled PBT › | |
| Under-hood connectors and sensors in heat and humidity | Hydrolysis-resistant PBT, glass-filled | Glass about 15–30%; hydrolysis tested by hours at a stated temperature and humidity, for example 85°C / 185°F and 85% RH | The exact aging test and pass criterion in your OEM spec, and whether laser welding or laser marking is needed. Automotive › | |
| Stiff structural, appliance and power-tool parts | PET with glass fiber, nucleated | Glass about 15–55% by ash, most often about 30–45%; needs a hot mold, often about 95–121°C / 203–250°F, to crystallize | Glass level, surface gloss, and whether a glass-filled PBT/PET blend would mold more easily in your tools. PET GF30 properties › | |
| Fiber-optic buffer tubes and extruded profiles | High-viscosity PBT extrusion grade | Low MVR, often under about 10 cm³/10 min (250°C / 482°F, 2.16 kg), with a viscosity number of about 145–160 ml/g; often hydrolysis-stabilized | Melt strength for your line speed, hydrolysis aging, and the cable standard your customer tests to. Pipe, tubing and conduit › |
These windows are typical published ranges to start the conversation. IV differs a little by test method and PBT flow by MVR versus MFR, so confirm against the data sheet for the grade you run and let a chemist check any equivalent before you switch.
Processing notes
- Drying. PBT: about 121°C / 250°F for 2–4 hours to 0.02% moisture (some suppliers allow 0.04–0.05%); drop to 93–100°C / 200–212°F if it will sit in the dryer overnight. Glass-filled PET: 120–135°C / 248–275°F for 2–4 hours virgin, 4–6 hours with regrind, to below 0.02%. See the drying chart for other resins.
- Melt temperature. Unfilled PBT 238–280°C / 460–536°F; above 280°C it decomposes. PBT GF30 238–275°C / 460–527°F. Glass-filled PET 271–300°C / 520–572°F. PBT residence about 5–10 minutes; empty the barrel if a PET run stops for more than 15 minutes.
- Mold temperature. Unfilled PBT 38–100°C / 100–212°F; PBT GF30 60–100°C / 140–212°F. Glass-filled PET needs 95–121°C / 203–250°F to crystallize.
- Shrinkage. Unfilled PBT 1.6–2.0% in both directions. PBT GF30 about 0.3% along the flow and up to about 1.1% across, depending on the producer. PET GF30 about 0.1–0.3% along the flow.
- Regrind. Many molders start at 15–25%, dried to about 0.02%. PET regrind that is amorphous (from a cold mold) must be crystallized before it is dried.
- Most common defect. Brittle parts from wet resin, with no visible surface defect to warn you. Measure moisture before every run. Warp is the second most common, in glass-filled grades.
How PET and PBT prices are set
PET is made from two feedstocks: purified terephthalic acid (PTA), which comes from paraxylene, and monoethylene glycol (MEG), which comes from ethylene. By weight, a pound of PET takes about 0.86 lb of PTA and about 0.33 lb of MEG, so PTA is the bigger cost. Many North American bottle resin contracts have been built on a raw-material cost formula: the change in paraxylene or PTA and MEG costs passes through, plus a conversion margin the producer sets or negotiates. Spot railcars and imports trade separately. Imports matter for PET, so ocean freight, the exchange rate and trade duties on imported PET resin also move the delivered price. OPIS (PetroChem Wire) and ICIS are two services that report PET prices.
What moves PET: paraxylene and crude oil, MEG plant outages, and the beverage season, since bottle demand rises in spring and summer. In 2020, power outages after Hurricane Laura shut several Gulf Coast MEG plants and led to force majeure declarations by MEG producers and then by a U.S. PET producer, which shows how fast one feedstock can tighten resin supply. PBT is made from PTA (or DMT) and 1,4-butanediol (BDO), so BDO supply drives it. Glass-filled and FR PBT add the cost of glass fiber, flame retardants and compounding, so they do not track the base polymer one for one.
A warning about search results: many PET price per pound numbers online are recycled bale or flake prices, which can be a small fraction of prime resin. None of them is the price of prime pellets for a production line.
We do not post prices. Every quote is for a specific grade, quantity, package and ship-to city. See how resin is priced for the mechanics and the resin market notes for which way PET is moving this month.
What order size does to the price
| How you buy | Typical size | Why the price per pound differs |
|---|---|---|
| Hopper railcar | About 180,000–210,000 lb | Closest to contract pricing for bottle, sheet and fiber PET. Needs silos, a rail siding or a transload. Rare for PBT. |
| Bulk truck (pneumatic hopper) | About 40,000–50,000 lb | No packaging cost. Common for PET sheet and bottle plants with silos. |
| Boxed truckload (gaylords or bulk bags) | About 40,000–45,000 lb | Adds packaging. Freight per pound is still low because the truck is full. The usual top size for PBT and glass-filled grades. |
| LTL or partial truckload | 2 to about 18 gaylords or bulk bags | Freight per pound runs several times a full truck, with terminal handling and surcharges. |
| Single gaylord or bulk bag | About 1,000–1,600 lb per gaylord | The highest freight per pound for boxed resin. The fixed cost of each order is spread over one package. |
| Small bags | 55 lb (25 kg) | The highest price per pound. Common for PBT, FR and glass-filled grades, often in moisture-barrier bags, and for samples. |
For bottle and fiber PET, railcar and bulk truck are normal and gaylord lots cost much more per pound. For PBT and glass-filled PET, most buying is in bags, gaylords and truckloads. Send your ship-to city with every request.
Ways to lower the cost: buy a full truckload instead of single gaylords, tell us imported resin is OK, or ask about surplus lots and recycled grades if your part allows. See how resin is priced.
Packaging and lead times
| Package | Typical net weight | Notes |
|---|---|---|
| Moisture-barrier bag | 55 lb (25 kg) | Foil-lined or multi-wall bags for PBT, FR and glass-filled grades. Reseal or use opened bags quickly, and dry before use either way. |
| Gaylord with liner | About 1,000–1,600 lb | Dense PET chips (about 50–55 lb/ft³ bulk density) fill the box less deep. Ask for a sealed or foil liner for PBT. Check net weight on the quote. |
| Bulk bag | Often about 2,200–2,750 lb (1,000–1,250 kg) for PET chips | Common for imported PET. Needs a bag unloader. |
| Bulk truck | About 40,000–50,000 lb | Blown into your silo. Check seal numbers against the bill of lading. |
| Hopper railcar | About 180,000–210,000 lb | For bottle, sheet and fiber PET. Needs a rail siding or a transload. Demurrage starts if the car sits past the railroad’s free time. |
We confirm a ship date with every quote, and we do not promise one until the source has confirmed it. Domestic bottle and sheet PET in railcars and bulk trucks moves on the producer’s schedule, and spring and summer are the tight months. Imported PET adds ocean transit. PBT, FR and glass-filled grades that are already packaged usually ship first, while a specific FR grade, color or hydrolysis-resistant compound may wait for the next run.
When a PTA, MEG or BDO plant goes down or a producer declares force majeure, contract customers are served first and spot supply tightens, so lead times stretch for everyone. Tell us the date you need resin on your floor and how much you have on hand, and we will tell you what is realistic. See what to do under allocation or force majeure and gaylord vs. LTL vs. truckload.
What to put on the purchase order
- PBT, PET or a blend, and the glass percentage.
- Melt flow or viscosity, with the test condition on the data sheet.
- Flame rating at your minimum wall, halogen-free if required, CTI, and glow-wire values if your appliance standard calls for them. Check the grade’s listing on UL Product iQ; recognition is grade-specific and color-specific.
- Hydrolysis resistance: the hours, temperature and humidity your customer tests to.
- Color, and whether the part needs laser marking.
- Food contact: ask for the producer’s FDA letter for the exact grade.
- COA values: melt flow or viscosity, glass content and moisture.
Prime, wide-spec, reprocessed or recycled
| Material | What it is | When it makes sense | What to ask for |
|---|---|---|---|
| Prime | The producer’s first-quality PET or PBT, in spec and sold under its grade name with a lot COA. | Bottles, food packaging, UL-listed FR parts, OEM-spec connectors and anything approved by grade. | The grade name, a lot COA with IV or MVR, the producer’s FDA letter for food, and the UL listing for FR grades. |
| Wide-spec or off-grade | Made by the producer but outside the window, often on IV, color (b*) or acetaldehyde. Sold without the grade name. | Strapping, some sheet and fiber, and non-food parts that tolerate variation. | IV measured on each lot by a stated method, color, and what is off. Not for bottles or food unless the documents allow it. |
| Reprocessed or regrind | Ground and repelletized industrial scrap such as preform, sheet trim or molded parts. | Sheet core layers, strapping and fiber that allow a set share. | IV range, color, contamination, and whether it is crystallized. Amorphous regrind must be crystallized before hot drying. |
| rPET (PCR) and PIR | Recycled PET from bottles or clean industrial scrap, sold as flake or pellets, sometimes upgraded in IV. | Bottles, sheet and strapping with recycled-content targets. | IV, color, contamination and AA. For food contact, the FDA letter of no objection (NOL) for the recycler’s process: FDA issues it for a process and stated conditions of use, not for each lot. See recycled resin. |
| Broker or unknown-origin lots | Material resold through several hands with no clear chain back to the producer. | Rarely. Only when you can test every lot yourself. | The producer’s original label and lot number, a COA that matches it, and proof of origin. Relabeled off-grade sold as prime is a known risk. See how to vet a resin supplier. |
Checking the COA when the lot arrives
- Lot number. The lot on the COA matches the label on every gaylord, bag or railcar seal, and the grade name matches your PO.
- IV with its method (PET). IV is inside your window and measured by a stated method, ASTM D4603 or the producer’s own. Compare lots and suppliers on the same method.
- Acetaldehyde (bottle PET). AA in the chip is at or below the grade’s limit, often about 1 ppm or less. Your preform AA also depends on drying, melt temperature and residence time.
- Crystallinity and melting point (PET). Bottle and sheet chips are shipped crystallized, so they can be dried hot without sticking. Fiber and film chips may be amorphous and need a crystallizer first.
- Color and end groups. Color (L* and b*) is inside spec. Carboxyl end groups, if reported, matter for hydrolysis life in fiber, strapping and under-hood PBT.
- MVR or viscosity number (PBT). MVR at 250°C / 482°F and 2.16 kg, or viscosity number by ISO 1628-5, is inside your window. Glass content by ash for filled grades.
- Moisture as packed. PET chips can arrive with a few tenths of a percent moisture, far above what you can process. PBT in sealed bags often ships drier, but it picks up water once opened. Dry every lot: bottle, sheet and fiber PET to about 50 ppm (0.005%), glass-filled PET to the producer’s limit, often 0.02% or less, and PBT to the producer’s limit, often about 0.02–0.04%. Water at melt temperature cuts the chains (hydrolysis), drops IV and makes parts brittle. See the drying chart.
- Keep a retain. Seal a small sample of each lot so you can test IV or MVR later. See the incoming inspection checklist and what a COA is.
Adding a second source without stopping the line
- Write down what you run now. The grade, its data sheet, three to six recent COAs with lot IV or MVR, your drying and process settings, and every approval tied to the grade: FDA letter, UL listing, OEM spec or brand-owner approval.
- Match on paper first. A polymer chemist compares IV by the same method (or MVR for PBT), copolymer type, AA, reheat additive, glass level, FR system and documents, and tells you what differs.
- Check your drying. Measure moisture after the dryer before the trial. A new grade often gets blamed for a dryer problem: bottle and sheet PET need about 50 ppm, glass-filled PET about 0.02% or less, and PBT about 0.02–0.04% by the producer’s limit.
- Sample, then a production trial. Run a full shift. For bottles, check preform IV drop, AA, haze, top load and burst. For PBT, check warp, weld lines and hydrolysis aging if the spec calls for it.
- Get approvals before volume. Brand-owner, UL and OEM approvals need requalification. Start that paperwork early, and keep the second source active with a small regular volume. See how to qualify a second resin source.
Want a chemist to compare a second source with what you run now? Send the grade and recent COAs through the quote form or an RFQ package.
When to consider something else
- If you need more strength and toughness and some moisture growth is acceptable, see glass-filled nylon vs. PBT.
- If parts go through reflow soldering or run hotter, look at PPA or PPS.
- If a housing needs impact toughness more than heat or chemical resistance, look at PC/ABS.
- If the part is a gear or sliding part, look at acetal.
Common questions
What is the difference between PBT and PET?
Both are polyesters. PET is mostly used for bottles, sheet and fiber, and in glass-filled grades for molded parts. PBT is an engineering resin for molded parts. PBT crystallizes fast, molds in a cooler tool and is the usual choice for connectors and electrical housings. Glass-filled PET is stiffer, takes more heat and gives a glossy surface, but needs a hot mold. See PBT vs. PET.
Does PBT need to be dried?
Yes. Dry at about 121°C / 250°F for 2–4 hours to 0.02% moisture. Hot, wet PBT breaks down in the barrel and parts lose strength without looking any different.
Is PBT flame retardant?
Standard PBT is typically rated UL 94 HB. FR grades reach V-0, some at thin walls, using halogenated or halogen-free packages. UL recognition is grade-specific and color-specific, so check the exact grade on UL Product iQ.
Why does glass-filled PET need a hot mold?
PET crystallizes slowly. In a mold below about 95°C / 203°F it stays partly amorphous, so parts are weaker and can warp or shrink later when heated. Engineering PET grades are nucleated to crystallize in a 95–121°C / 203–250°F mold.
What is the price of PET resin per pound?
We do not post a price because there is no single one. Prime PET follows PTA and MEG costs, imports and the beverage season, and your price depends on grade, quantity, packaging and freight to your dock. Many online numbers are recycled bale or flake prices, which are far below prime resin. See the resin market notes for direction, and send your grade, quantity and ship-to city for a firm quote.
What is the minimum order for PET or PBT?
One gaylord, about 1,000 to 1,600 lb, for PBT, glass-filled and specialty grades. Bottle and fiber PET is mostly sold by bulk truck and railcar, so a gaylord of bottle resin costs much more per pound. To qualify a production grade, ask about a sample of about 50 lb, available upon credit approval.
What IV PET do I need?
It depends on the product. Fiber and BOPET film chips run about 0.60–0.68 dL/g, water and general bottles about 0.72–0.80, CSD bottles about 0.80–0.86, strapping often about 0.80–0.95, and industrial yarn about 0.90 or higher. Compare grades only when IV is measured by the same method, and send us the IV on your current COA.
What is the difference between crystallized and amorphous PET chips?
Crystallized chips, the normal form for bottle and sheet resin, are opaque white and can go straight into a hot dryer. Amorphous chips are clear and soften and stick together above about 70–80°C / 158–176°F, so they must pass through a crystallizer before drying at PET temperatures. Amorphous regrind from preforms or sheet needs the same step.
How dry does PET need to be before molding?
For bottle preforms and sheet, about 50 ppm (0.005%) moisture, usually reached at about 160–170°C / 320–338°F for 4–6 hours with air at a dew point of about −40°C / −40°F. Check the producer’s maximum dryer temperature. Glass-filled molding PET is dried cooler, at about 120–135°C / 248–275°F, to below 0.02%. Wet PET hydrolyzes in the melt, which drops IV and raises acetaldehyde. Measure moisture after the dryer, since the right setting depends on throughput and hopper size.
Tell us the PET / PBT grade you run now
A polymer chemist reviews every request, then matches your grade or finds a qualified equivalent and prices it.
What to send for an accurate quote
- The grade name, from any supplier, or a data sheet
- Color (natural, black or a custom match)
- Fill type and percentage, if any
- Melt flow, if you know it
- Quantity for this order and what you use in a year
- Ship-to city and state or province
A second source for your PBT or PET
Send the polyester grade, glass content, flame rating and volume; a polymer chemist reviews it and we quote that grade or an equivalent.
Request a QuoteNot sure which grade to ask for?
Send the grade you run now, or describe the part. A polymer chemist reviews every request.