---
title: "Technical and Quality Justification of TIMOL Polyurethane Scrapers"
description: "Detailed analysis of TIMOL polyurethane scrapers: wear resistance, hardness, installation. Discover why they are the optimal choice for industry now."
lang: "en"
date: "2026-11-11"
canonical_url: "https://timol.com.ua/en/statti/obgruntuvannya-tehnichnih-ta-yakisnih-harakteristik-skrebkiv"
---
# Technical and Quality Justification of TIMOL Polyurethane Scrapers

A component that wears out in a week can halt an entire concrete mixing or transportation line. Scrapers often cause downtime when steel or rubber parts fail long before their scheduled replacement. Polyurethane scrapers change the situation: they work longer and more stably. This article examines why TIMOL polyurethane provides optimal technical and quality characteristics for industrial scrapers.

## Why is polyurethane the optimal material for scrapers?
Polyurethane is chosen for scrapers due to its unique ability to combine elasticity, ultra-high wear resistance, and a wide temperature range. Only TIMOL polyurethane demonstrates wear resistance 10 times higher than standard rubber, fundamentally changing the economics and replacement rhythm of components. Unlike steel, which transmits impacts to the structure and can chip, polyurethane absorbs impact loads and 'bounces' abrasive particles back due to its elasticity.

During operation, the scraper is exposed to harsh conditions: contact with concrete mix, abrasive sand, and hard fillers. Rubber scrapers tear quickly, and steel ones are prone to chipping, leading to emergency stops. Polyurethane blades work more stably, maintaining their working geometry longer, even under peak loads.

## Scraper hardness: optimal choice for abrasive action
For scrapers operating in abrasive environments, the optimal hardness is in the range of 80 to 95 Shore A. This is the threshold where the material remains elastic yet hard enough to resist abrasive penetration. In this zone, polyurethane prevents particles from cutting through it and dampens impacts, returning the abrasive fraction back into the flow. Hardness above this (Shore D) leads to loss of elasticity and increased risk of chipping, which is critical for scrapers working with dense or hard materials.

Properly selected hardness reduces point wear and avoids local damage, even if metal or stone inclusions occur in the flow. For concrete mixers and belt conveyors, this range is recommended, as verified in dozens of industrial units.

## Comparative table: polyurethane vs. rubber and steel
Below are key numerical indicators illustrating the advantage of TIMOL polyurethane over traditional scraper materials. The data is taken from DIN handbooks and material passports, provided for comparison in concrete mixer and conveyor units.

| Material | Abrasion (DIN 53516), mm3 | Working Temperature, °C | Hardness | Density, g/cm3 | Tensile Strength, MPa |
|---------------------------------|---------------------------|------------------------|---------------------|------------------|------------------------|
| Polyurethane (TIMOL) | 20-45 | -60...+100 | 50A-70D (scrapers 80-95A) | 1.05-1.25 | 25-60 |
| SBR Rubber | 100-200 | -40...80 | 40A-80A | 0.94-1.1 | 8-20 |
| NBR Rubber | 80-150 | -30...100 | 40A-90A | 1-1.3 | 10-25 |
| Structural Steel |, | -40...500 | 120-250 HB | 7.7-7.9 | 370-700 |
| Wear-resistant Steel Hardox |, | -40...250 | 370-540 HB | 7.8-7.85 | 1250-1600 |

Polyurethane abrasion is 20, 45 mm3 (DIN 53516), while SBR rubber is 100, 200 mm3. This means rubber scrapers wear out 3.5 times faster, and considering operational conditions, polyurethane provides 10 times more resource due to its elasticity and strength.

## Features of polyurethane scrapers in mixed environments
Polyurethane scrapers prove their effectiveness in aggressive conditions where the material is exposed to abrasives, sand, gravel, cement, or other fillers. Thanks to a working temperature of -60 to +100 °C, TIMOL scrapers remain elastic even in frost and do not lose properties when heated while working with hot mixtures.

Nitrile rubber (NBR) works only up to -30 °C, and SBR up to -40 °C, significantly limiting their use in cold regions and open sites. Polyurethane does not crack in winter and does not become brittle, minimizing the risk of emergency failures. This stability ensures a longer maintenance interval in units where operating conditions change throughout the day or season.

## Manufacturing scrapers by free casting: flexibility and repeatability
TIMOL polyurethane scrapers are manufactured using the free casting technology, allowing the creation of parts of any complexity according to individual drawings. This method ensures precise adherence to the geometry required for a specific unit, whether it's a concrete mixer, conveyor, or other industrial equipment.

Thanks to this technology, it is possible to produce both standard and completely unique scrapers with an optimized profile. This is especially valuable for units where a standard part does not provide the required resource, or when it is necessary to adapt the scraper to a modernized design. The use of free casting enhances the quality of adhesion to the metal insert, which is important for the reliability of the unit.

## Installation and maintenance of polyurethane scrapers
Scraper installation is performed directly on-site, usually using bolt connections or embedded elements. It is important to ensure a tight fit of the part to the working surface of the drum or belt: this prevents the appearance of blow zones and uneven wear. Before installation, it is necessary to completely remove remnants of the old material, clean the surface, and check the correct seating of the new part.

During operation, the polyurethane scraper requires minimal maintenance. It does not require regular replacement or additional lubrication, unlike rubber counterparts. However, wear control is performed visually or using a gauge, allowing timely planning of replacement without emergency downtime.

> **Engineer’s Tip:** For concrete mixer and belt conveyor scrapers, choose polyurethane hardness of 85 to 95 Shore A. This will ensure maximum resource when working with abrasives while maintaining elasticity that dampens impacts and prevents chipping. When installing, it is important to properly fit the scraper to the drum or belt shape, reducing point wear and extending service life.

## Where polyurethane scrapers are used: 12 industries
TIMOL polyurethane scrapers are used in mining, metallurgy, chemical industry, engineering, oil and gas sector, railway transport, pipe production, pulp and paper, food industry, docks, agriculture, light industry, and printing. In each of these industries, scrapers perform functions of cleaning working surfaces, transporting masses, protecting against sticking, and abrasive wear. Learn more about the material properties and technologies on the [reference information](/informatsiya) page.

For example, in the mining and metallurgical industries, scrapers clean conveyor belts from adhered material, reducing downtime and productivity losses. In the food industry, they ensure equipment cleanliness and maintain product quality without releasing foreign substances.

## How to order polyurethane scrapers for your unit?
TIMOL factory manufactures concrete mixer scrapers both in standard sizes and according to individual customer drawings. To calculate and order, it is enough to provide a drawing or sample of the part, as well as specify working conditions, type of abrasive, temperature, and installation method. Factory specialists will help select the optimal hardness and design for your unit.

The entire range of scrapers, blades, and other parts can be viewed in the [product catalog](/katalog). For clarification of manufacturing terms, consultation on hardness selection, installation, or maintenance, contact us through [contacts](/contacts). The flexibility of production allows even the most complex products to be realized in a short time with guaranteed quality.

## Practical conclusion: when to choose polyurethane scrapers?
If minimizing production downtime, reducing maintenance costs, and achieving stable resources in the harshest operating conditions are critical for you, TIMOL polyurethane scrapers are the optimal choice. The material provides elasticity, wear resistance 10 times higher than rubber, and versatility for 12 industries. Contact us for consultation, calculation for your drawing, or ordering through the [catalog](/katalog) or [contacts](/contacts) of the TIMOL factory.