Buying polyurethane screens for mining without understanding the specs is a fast track to underperformance. Here's a no-fluff breakdown of the common specifications, aperture types, and technical parameters that actually matter.
Standard Specifications At a Glance
Most polyurethane screens for mining come in modular panels: 305×305mm, 305×610mm, 305×915mm, and 305×1220mm. Thickness ranges from 6mm of fine screening to 50mm of heavy-duty scalping. Shore A hardness sits between 85 and 98 ，softer grades of 85–90A for wet fine screening, harder grades of 92–98A for abrasive dry feeds like iron ore and basalt.
Aperture Types: Match the Shape to Your Process
Four main aperture types of Polyurethane screens dominate the market，Square aperture applies for Tight cuts in sand and gravel. Open area 30–45%. Rectangular slotted is best for dewatering and desliming. Open area up to 50%. Wedge wire screen is the Flexible alternative for medium-fine separation. Finger plate is Used on trommel undersides. Apertures ranges from 10–80mm. Square apertures give precision. Slots dewater faster. You should Pick the polyurethane screens based on your process, not preference.
Technical Parameters of Polyurethane Screens That really Matter
These numbers tell you whether a screen will survive your feed: Tensile strength of Polyurethane Screens is from35–55 MPa，higher means better impact resistance.Elongation at break is from 300–600% ， higher idex means better shock absorption.Abrasion loss is from 150–250 mm³， lower number is better for abrasive ores. Temperature ranges from -40°C to +80°C ， the material will soften if exceeds the temperature. There are four Bonding method ，includes Inlay, bolt-on, and beaded ，this will affects install speed and seal quality.
The Spec of Polyurethane Screen Everyone Ignores: Open Area
A 45% open area screen processes 30–40% more material than a 30% one at the same aperture size. But higher open area means less structural support, so it wears faster under heavy impact. For polyurethane screens for mining, the sweet spot is 35–45% open area for most applications.
Don't just ask for a price. You need to ask for the specifications, aperture types, and technical parameters that match your feed. A properly polyurethane screen lasts threefold longer and costs less per ton. Anything else is guesswork.
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