Surplus resin
Prime material left over from canceled programs, priced to move. When a lot is gone, it’s gone.
PBT/PET, 55% glass-filled, black
Injection molding grade · heat stabilized · lubricated
Why it’s discounted
This material was bought for an automotive part, a side mirror bracket assembly, and the OEM discontinued the program. The purchase orders were canceled, leaving the grade in inventory. It is prime, unused material in its original packaging, with a COA available for the lot. Molders pay $1.90/lb for this spec; this lot is $0.65/lb.
What it is
A blend of PBT and PET polyester reinforced with 55% short glass fiber. It is very stiff and strong, holds its shape to 205°C under load, and is often used to replace metal in brackets and structural parts. It matches the stiffness and strength of highly glass-filled nylon but absorbs far less moisture, so dimensions and stiffness stay steadier in humid conditions.
Good fits
- Parts already running 50 to 55% glass PBT, PET or PBT/PET
- Brackets, mounts and structural housings that need high stiffness
- Metal replacement in automotive, appliance, equipment and industrial parts
- Parts in glass-filled nylon where moisture swelling is a problem
Moving from a lower glass level, such as 30%, changes weight, shrinkage and stiffness, so plan a trial run first. A polymer chemist will tell you if it fits before you commit.
Taking the whole lot? Additional discounts are possible when you buy all of the inventory. Price is per pound, FOB our South Carolina warehouse; freight to your plant can be quoted on request.
Typical properties
From the producer’s technical data sheet, dry as molded. The full data sheet is available on request.
| Property | Value | Test |
|---|---|---|
| Density | 1.78 g/cm³ | ISO 1183 |
| Melt flow rate (275°C / 5 kg) | 43 g/10 min | ISO 1133 |
| Tensile modulus | 18,000 MPa (2.61 million psi) | ISO 527 |
| Tensile strength at break | 175 MPa (25,400 psi) | ISO 527 |
| Elongation at break | 2% | ISO 527 |
| Flexural modulus | 17,000 MPa (2.47 million psi) | ISO 178 |
| Flexural strength | 270 MPa (39,200 psi) | ISO 178 |
| Notched Izod impact | 9 kJ/m² | ISO 180/1A |
| Unnotched Izod impact | 50 kJ/m² | ISO 180/1U |
| Melting point | 225°C (437°F) | ISO 11357 |
| Heat deflection, 1.8 MPa | 205°C (401°F) | ISO 75 |
| Heat deflection, 0.45 MPa | 220°C (428°F) | ISO 75 |
| Mold shrinkage, along / across flow | 0.2% / 0.4% | ISO 294-4 |
| Flammability | HB at 0.8 mm | UL 94 |
| Comparative tracking index | 250 V | IEC 60112 |
Processing
- Drying: 4 hours at 250–265°F (120–130°C) in a desiccant dryer. Like all polyesters it must be dried; wet material molds brittle. See the drying chart.
- Mold temperature: 176°F (80°C) minimum; 195–230°F (90–110°C) gives the best surface and dimensions.
- Melt temperature: within the producer’s 430–520°F (220–270°C) window; highly glass-filled grades usually run toward the upper end.
- Regrind: usable at a constant ratio, dried before use.
Inquire about this lot
Tell us roughly how much and where it ships. A polymer chemist will check the fit for your part and send a quote.
Get first look at new surplus lots
New lots come up when programs end or orders change. Leave your email and we’ll send new lots before they are posted. No other mail.