The Role of PU Scraper (Conveyor Belt Cleaner) in Bulk Material Handling

In industries such as mining, quarrying, cement, and bulk material transportation, maintaining the efficiency of conveyor systems is essential to operational success. One crucial component that ensures smooth and clean belt operation is the PU scraper, also known as a conveyor belt cleaner.

What Is a PU Scraper?

A PU scraper is a cleaning device installed on the return or discharge side of a conveyor belt system. It is typically made from polyurethane (PU) due to its outstanding wear resistance, elasticity, and low friction characteristics. The primary function of the scraper is to remove residual material from the belt surface, minimizing carryback and preventing material buildup on pulleys and rollers.

Why Polyurethane (PU)?

Polyurethane is the preferred material for conveyor scrapers for several reasons:

High wear resistance: Ideal for abrasive environments such as mining and cement.

Non-damaging to the belt: Unlike metal scrapers, PU scrapers clean efficiently without damaging the belt surface.

Flexible and impact-resistant: Absorbs shock and adapts to minor belt irregularities.

Corrosion-resistant: Suitable for humid, wet, or chemically aggressive environments.

Types of PU Scrapers

PU scrapers are typically categorized into:

Primary scrapers: Installed at the head pulley, designed to remove most of the material.

Secondary scrapers: Placed further along the return path, used to clean finer residue.

V-plough or diagonal scrapers: Installed on the return side to protect tail pulleys from trapped material.

Applications

PU scrapers are widely used in:

Mining and mineral processing

Coal handling systems

Cement plants

Quarry operations

Fertilizer and chemical bulk conveyors

Food-grade systems (with FDA-approved PU)

Advantages of Using PU Scrapers

Reduces material carryback, improving housekeeping and safety

Prevents buildup that can cause belt misalignment or wear

Extends belt and pulley lifespan

Minimizes downtime and maintenance costs

Compatible with various belt widths and materials

Customization & OEM Support

At Yantai Zhengyuan Polyurethane Co., Ltd., we offer custom-made PU scrapers to fit your conveyor system specifications. Our team supports OEM production, including scraper blades, holders, and integrated belt cleaning systems.

Whether you are seeking a standard solution or a tailor-made design for a demanding application, our polyurethane scrapers are engineered to perform under tough conditions.