High-performance cast polyurethane elastomer systems for industrial scrapers and squeegees — conveyor belt cleaner blades, snow-plow and road-sweeper blades, screen-printing and ceramic squeegees, and floor/concrete squeegees. Solid cast PU combines outstanding abrasion resistance, a sharp wear-retaining edge and flexibility, outlasting steel and rubber while protecting the surface it cleans. Hardness and chemistry tuned to your belt, fluid and duty.
20–80
Abrasion loss mm³ DIN 53516
A60–D75
Hardness Shore
60–120
Tear strength kN/m
20–55
Tensile MPa
−40~120
Service temp °C
Key Features
Outstanding abrasion resistance Long blade life against abrasive material carry-back and grit.
Sharp, wear-retaining edge Holds a clean scraping line for thorough belt cleaning and crisp print/coating.
Belt-friendly — non-marking Flexes to the belt or surface and cleans without scoring the cover.
High tear & cut resistance Withstands splice impact and lump strikes on returning conveyor belts.
Oil, ozone & weather resistant Polyester systems resist oil and ozone; suitable for outdoor plow & sweeper duty.
Customizable hardness & profile Edge geometry, hardness and chemistry tuned to your application. OEM/ODM.
Applications
Conveyor Belt ScrapersBelt Cleaner BladesSnow-Plow & Sweeper BladesScraper Blade Inserts
Also produced from the same systems: screen-printing & ceramic-glaze squeegees, doctor blades, floor / concrete squeegees, road-sweeper strips and custom scraper profiles.
Technical Specifications
Property
Range
Test Method
Hardness
Shore A 60 – Shore D 75
ASTM D2240
Tensile strength
20–55 MPa
ASTM D412
Elongation at break
250–650%
ASTM D412
Tear strength
60–120 kN/m
ASTM D624
Abrasion resistance
20–80 mm³
DIN 53516
Rebound resilience
35–55%
ASTM D2632
Compression set
< 25% (70 °C / 22h)
ASTM D395
Operating temperature
−40 °C to +120 °C continuous
ISO 9142
Parameters customizable by formulation; typical values for reference, not a binding specification.
Casting Processes
Open-Mold Casting For long scraper blades, squeegee strips and flat profiles.
Insert Bonding Cast PU bonded onto steel back-plates and tensioner inserts.
Vacuum Casting Void-free edges for precision squeegees and doctor blades.
Automated Casting Compatible with PU casting machines and automated dispensing.
Packaging, Storage & Handling
Packaging Prepolymer and curative supplied in iron drums; palletised for export. Bulk on request.
Storage Store sealed in a cool, dry, ventilated area away from moisture. Shelf-life details on request.
Handling & Safety Avoid eye/skin contact; wear safety glasses. Wash skin with soap and water; flush eyes with water and seek medical attention. Full MSDS on request.
One-Stop PU Elastomer Solution
Beyond raw materials, BlendPolyol provides matched equipment and tooling — a complete production-line partner, not just a chemical supplier:
10+ years in PU raw materials Specialised PU elastomer & polyol manufacturer serving industry worldwide.
Custom formulation Hardness, edge profile and chemistry tuned to your belt and material.
Equipment integration Casting machines, mixing systems and blade moulds as a complete solution.
Global export & fast reply Export to EU, Latin America, Asia and beyond — we respond within 24 hours.
From Sample to Bulk Order
1. Share your duty Tell us belt/surface, material, speed and environment — we recommend a system.
2. Sample & validate Trial-cast blades; we fine-tune hardness, edge profile and chemistry resistance.
3. Scale to bulk Confirm the formula and order in bulk with flexible MOQ and tiered lead times.
Frequently Asked Questions
Why PU scrapers instead of steel or rubber?Cast PU resists abrasion far better than rubber and is gentler on the belt than steel — so it cleans thoroughly, lasts longer and avoids scoring the belt cover.
Which hardness should I choose?Softer grades (Shore A80–90) suit primary belt cleaning and printing squeegees; harder grades (A95–D) suit heavy carry-back and abrasive duty. We advise based on your application.
Can the PU be bonded to a steel holder?Yes. We supply systems that bond cast PU to steel back-plates, tensioners and squeegee handles for replaceable-blade designs.
Do you supply raw material or finished blades?Our core product is the PU elastomer raw-material system; we also offer matched casting machines and moulds so you can produce blades in-house. We reply within 24 hours.
Need PU elastomer for scrapers & squeegees?
Get a tailored formulation, full TDS & MSDS, and a sample for casting validation.
✓ Tunable hardness A60–D75✓ TDS · MSDS · COA✓ Reply within 24 h
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