Why using DESLIDUR?

  • DESLIDUR profiles (wearstrips) increase the duration and conservation of roller chains, plate chains, belts,...

  • DESLIDUR profiles reduce the noise in the factories, improving the working environment.

  • DESLIDUR profiles reduce power requirements.

  • DESLIDUR profiles are self lubricated, therefore, they decrease the necessities of maintenance.

  • The material with which DESLIDUR profiles are fabricated have been approved by the FDA/USDA and may be used in direct contact with food products.

  • The operating temperature, from -40° to 80° C, without humidity absorption, allows DESLIDUR profiles to adapt to a wide range of uses.

  • DESLIDUR material is re-cyclable.

PRINCIPAL PROPERTIES OF DESLIDUR PROFILES:
 
- High abrasion resistance
- Low co-efficient of friction
- No absorption of humidity
- High resistance to impact and flexibility
- Excellent chemical resistance
- Approved for food applications
- Homogeneity of materials

USES AND ASSEMBLY.
 
DESLIDUR profiles perform exceptionally well at a constant temperature between -40°C to 80°C, and for short periods of time up to a temperature of 120°C.

When the temperature is higher than the one recommended, please consult our commercial-technical department.

When assembling it must be foreseen the coefficient of linear dilation, 2 mm/meter for every 10 degrees of variation in the range of 20°C to 100°C.

To avoid consequences of this phenomenon you may choose, for example, dto cut the profile at an angle of 45° at every joining point. This system is principally used with profiles supported by metal guides, according to the drawing below.

 

Properties of DESLIDUR plastic materials

 
DESLIDUR'S MECHANICAL PRODUCTS
The T.M. AVE plastics factory uses leading edge technology to produce and process semi-finished and fully finished items from a low pressure, ultrahigh molecular weight polyethylene called DESLIDUR, by means of pressing and sintering or extrusion procedures. These materials, which are highly resistant to wear and tear, make it possible to offer solutions to many technical problems where the mechanical components and construction elements are subjected to extreme stress.

LOW PRESSURE ULTRAHIGH MOLECULAR
WEIGHT POLYETHYLENE UHMW PE -DESLIDUR
As its raw material, T.M. AVE uses ®HOSTALEN GUR, manufactured according to Professor Ziegler's method. ®HOSTALEN GUR is a low pressure, ultrahigh molecular weight polyethylene, known as DESLIDUR, which exhibits high polymerization properties. Its molecular weight goes from 4,5 to 8 million when measured by the light dispersion method and over 1 million when determined viscometrically. This extremely high molecular weight ensures that the polyethylene has enhanced wear-resistant properties, in particular as regards its impact strength, fracture strength and bending strength among other key technical features. The values of such properties remain high even under the coldest temperature conditions. In addition, ultrahigh molecular weight DESLIDUR is self-lubricating.

SLIDING PROPERTIES AND FRICTION COEFFICIENT
DESLIDUR has excellent sliding properties. Comparative studies with other plastics have shown that it has self-lubricating properties when used in dry friction situations when sliding against metals such as steel, brass or copper. Its emergency sliding properties are also very good. The DESLIDUR bearing sleeves holding the shafts are unaffected by dirt (dust, sand and similar particles) or lateral flexing. Such properties prevent the so-called "gripping" of the shafts. However an essential condition for these bearings to work to their full potential is that the heat caused by the friction be dissipated to the outside.

WATER ABSORPTION
DESLIDUR is hydrofugous and does not swell. This means that, unlike humidity-absorbing plastics such as the polymides, its outstanding features are independent of the degree of humidity in the environment of the finished part. The absorption of water which can sometimes be seen, particularly when there is a change in temperature, is due only to the slight condensation of humidity on the surface.

PHYSIOLOGICAL BEHAVIOUR
The different types of DESLIDUR are odourless and tasteless. There is no reason why they should not come into contact with food products.

* Relationship between the dynamic friction value of Hostalen GUR and sliding speed (at average surface pressures of pm = 2,625 y 12,375 kp/cm2). Relation entre la valeur dynamique de friction de l'Hostalen GUR et la vitesse de glissement (surface moyenne de pression de pm/-2,625 et 12,375 kp/cm2)
 

  

* Relationship between the dynamic friction value of Hostalen GUR and average surface pressure (at a constant sliding speed of v=10m/min). Relation entre la valeur dynamique de friction de l'Hostalen GUR et la surface moyenne de pression (à une vitesse constante de glissement de v=10 m/mn)
 

 

Application examples

 
MECHANICAL MAINTENANCE
The canning, packing and bottling industry and its customers - manufacturers of preserves, brewers, dairies and so on - use items made from DESLIDUR for their sliding properties, resistance to abrasion and silent working. Besides, they need neither painting nor lubricating. In certain circumstances it is useful to use it for guiding strips and sliding strips or bands for conveyor chains, conveyor belt supports, chain wheels, tansport rollers, tensors, direction changers, flange plates, transport chain stars and curves, inclined planes, helical screw conveyors, input parts, etc.

THE MEAT AND FISH INDUSTRIES THE FOOD PRODUCTS INDUSTRY
DESLIDUR's advantages are easily apparent in this sector. It lasts several times longer than wood, does not rot, is hygienically faultless, is rated as physiologically neutral by the Federal Health Bureau, does not blunt cutting edges and can be easily cleaned with hot water. For all these reasons, plating for working table tops and coatings for other items used in processing meat, fish and vegetables are made of DESLIDUR. Its special properties, particularly the fact that it does not stick and is so easy to clean, mean that it is also used in the pasta, confectionery and sugar industries for items such as scrapers, moulds, bearing sleeves, worms, sliding strips, table veneers, hopper coatings, inclined planes, hoppers feeders and storage containers in general.

MINING. MECHANICAL MAINTENANCE AND BULK STORAGE
Hoppers, inclined planes, guides, feeder hoppers and other devices as well as mechanical maintenance equipment, interior transport and bulk storage containers can all profitably be coated with DESLIDUR. Its high abrasion resistance and its optimum sliding properties allow the use of slight inclination angles. It will prevent bulk materials from sticking whether they are dry, wet, pasty or sticky and will prevent input holdups dues to bottlenecks, freezing, compacting or unscrambling. Open lorries, self-unloading wagons and other means of transport are also best coated with DESLIDUR.

THE TEXTILE INDUSTRY
Pickers made of DESLIDUR are able to withstand up to 100 million impacts without breaking. Other parts for which the properties of DESLIDUR are particularly suited include leather ejection collars, cogwheels, shock absorbers and picker protection belts.

THE CHEMICAL INDUSTRY
DESLIDUR's exceptional resistance to chemicals and stress-corrosion cracking make it the ideal material for a wide range of applications. It is not attacked by aquerous solutions of acids, alkalis, salts or the majority of solvents and is only vulnerable to aromatic and halogenized hydrocarbons at very high temperatures. At most, oil, grease and wax may produce a very slight swelling.

MACHINERY AND APPLIANCE CONSTRUCTION
DESLIDUR materials offer constructor new possibilities in a whole array of different areas. These special features include high wear resistance, good abrasion perfomance, excellent sliding properties, maximum impact and bending strength and resistance to corrosion by chemical products and the weather. In addition to all this, these materials are fracture and cold resistant, vibration absorbent, self-lubricating, free from swelling, waterproof, humidity repellent, harmless, odourless and tasteless.

APPLICATION EXAMPLES
Sliding. Guides strips and belts. Guide Blocks and inserts. Rollers, cable sheaves, cable return pulleys. Gears. Bearing sleeves and bushes. Underwater bearings. Conveyor chain stars. Sprocket replacements, coupling discs, roller guides, drive sprockets, drawing machine chute coatings, etc. in the engineering industry. Carrier plates, door rollers, edge protectors, etc. in ship-building and the aeronautical industry. Sliding guides, feet bosses, chain guide strips, etc., for escalators and lifts. Cable pulleys and cable reversing disc for cable cars. Sliding supports, strips and blocks, impact plates, carrier blocks for bale conveyors, etc. in agricultural machinery construction. Door locks and guides in railway carriage construction. In certain applications it is important to bear in mind the limitations due to cold flow (deriving from the material's viscous-elastic behaviour), thermal expansion and heat resistance.


 
 
 
 
 

 
Chemical substance
Temperatures up to 65ºC		 Polyamide Steel Stainless Steel
AISI 304		 Stainless Steel
AISI 430 - Supertenaz		 Acetal and
Acetal LF		 Deslidur
UHMW-PE
Acetone B NS B B B B
 Acetic Acid (max.5%) NS NS B NS NS B
Citric Acid R NS B R R B
Formic Acid NS B B B B B
Phosphoric Acid (max.10%) NS NS B NS NS B
 Hydrochloric Acid (max.2%) NS NS NS NS NS B
Lactic Acid B NS B NS B B
Nitric Acid NS NS B R NS R
Sulphide Acid NS NS NS NS NS NS
Oil (vegetable or mineral) B B B B B B
Soap and water B R B B B B
Fresh water B NS B B B B
Sea water NS R B R B B
Alcohol B B B B B B
Ammonia B R B B NS B
Soft drinks B B B B B B
Spirits B B B B B B
Benzene B B B B B R
Benzol B B B B B B
Beer B B B B B B
Chocolat R B B B R R
Sodium Hydrochloride B NS R NS B B
Petrol B B B B B R
Sodium hydroxide (max.25%) B NS B B NS B
Sodium hypochlorite B NS NS NS NS B
Fruit Juices B NS B R B B
Juices vegetable B R B B B B
Milk B B B B B B
Mustard R B B B R R
Paraffin B B B B B B
Hydrogen peroxide NS NS B R NS R
Carbon tetrachloride B R R R B R
Toluene NS NS NS NS B R
Turpentine NS B B B NS R
Vinegar B NS R NS B B
Wine B B B B B B
Whisky B B B B B B
Lodine NS R R R R R
Xilol NS NS NS NS NS NS
B = Good R = Average NS = Unsatisfactory
This information may be considered as a basis for recommendation, but not as a guarantee.
Materials and products should be tested under exact intended service conditions
to determine their suitability for a particular purpose.