Polyurethane PUR
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UW-ELAST designs, develops and manufactures polyurethane products
Why use polyurethane?
- Resistant to mechanical abrasion
- Good load-bearing capacity and low settlement
- Polyurethane can withstand continuous working temperatures between about -40 degrees C to about +80 degrees C
- Good resistance to water and oil, petrol and other similar liquids
- Very strong adhesion to metal, plastic and similar materials
- Has a sound-absorbing effect.
Read more: What is Polyurethane?
What is polyurethane?
Polyurethane, PUR, is a collective name for a large number of materials with varying properties. What they have in common is that they contain urethane groups (-NH COO-). A large number of other chemical groups, for example ester, ether, urea, biuret, allophanate groups and double bonds may be included in the polyurethane molecules. By mixing pigments, fillers, fibers, various additives and other polymers, the properties can be changed, practically indefinitely. There is no other material group that gives the designer as great opportunities as polyurethane (PUR). Polyurethanes can be soft or hard, solid or cellular, high damping or low damping, brittle or impact resistant, have high water absorption or low water absorption.
POLYURETHANES ARE AVAILABLE IN VARIOUS FORMS
Polyurethanes are available as rubber, thermoplastics, thermoelastics, thermosets, cellular plastics, fibers, foils, rocket fuels and as binders for paints, varnishes and adhesives. Depending on the construction, polyurethanes can be processed in different ways. They can be reaction cast with high pressure or low pressure machines, injection molded, extruded, pressed and foamed by several methods.
Own brands in polymeric material
UW-ELAST has chosen to work with its own brands because there is no standard for polymeric materials in the same way as for steel and other standardized materials. Our brands are, for example, Slitan, Trekollan and Vulkollan and to some extent TPU which is a thermoplastic polyurethane.
One of the materials we work with is Solid polyurethane which is a superb construction material whose properties can be varied almost infinitely. To do that is a challenge and there is where we come into the picture. UW-ELAST has been doing this since 1975.
UW-ELAST has knowledge of the material and can make adjustments to each application, so when a problem arises, contact us for a discussion to find the optimal technical solution.
Slitan is particularly well suited for industrial applications such as heavy industry and engineering. You can manufacture construction details and you can coat rollers and wheels and get very high wear resistance.
Trekollan is very suitable wherever you need wear-resistance, for example when you have plow blades and concrete mixer requirements.
Vulkollan is called “King of Urethanes”. It is suitable for coating wheels and to some extent rollers where you have extremely high dynamic loads. A good example of this is a rollercoaster in Liseberg, a big amusement park in Gothenburg, where we have coated the wheels with Vulkollan.
More information about polyurethane
Milling and turning
- Use sharp sharpened tool edges.
- High cutting speed.
- Slow feeding.
- Greater release than for metals.
- Milling difficult under 50 Shore A.
- Cooling appropriate
Drilling
- Use helical drills.
- Sharp eggs.
- Release angle 0 or negative.
- Tip angle 90-110 for large diameters and/or thick-walled details, 115-130 for thin-walled details.
- Slow feed (approx. 0.2 mm / rev).
- High speed.
- Cooling with cutting oil.
Drilling and punching
The drill should be retracted from time to time to prevent the chips from blocking the borehole. If a series of small holes are to be drilled, sticks should be inserted into the finished holes, otherwise the material will “flow” into them and the new holes will not be round. Polyurethane is elastic and springs back. The hole is therefore about 4% smaller than the drill steel. Punching can also be used for drilling holes in thin plates. For this purpose, sharp chisels are used, which are mounted in a press. In general, holes larger than the thickness of the polyurethane are difficult to punch. In fact, it is the strength of the punching tool that is the limitation. When punching thick plates, the hole becomes “hourglass shaped”.
Cleavage
There are a variety of methods for making thin tiles from thicker ones. With the help of so-called slitting machines, the most important part of which is a sharp knife, it is possible to produce very thin foils from a polyurethane cylinder. Thick plates can also be sawn with a standard band saw. The material should then be cooled with a coolant.
Read more about polyurethane tiles here.
Gluing of polyurethane
It is easiest to get a good adhesion if the polyurethane is not completely cured. If the polyurethane is fully hardened, the surface must be roughened or blasted with steel sand. The surface must then be made very clean from dirt and release agents. A major problem is silicone oil-based release agents, which are difficult to completely remove.
For gluing polyurethanes, polyurethane glue or fairly flexible epoxy glue is best suited. The adhesive must give a joint that has a lower stiffness than the polyurethane, otherwise there is a risk that the joint will break during bending load.
Epoxy resins, polyurethanes and silicone rubber are mainly used as grouts for electrical and electronic parts. Each material group has its advantages and limitations.
Silicone rubber
Silicone rubber has superior temperature resistance and at the same time also the best low-temperature properties. In addition, silicone rubber has a very low dielectric constant and a very low dielectric loss factor. This means that silicone rubber is not heated by, for example, microwaves. In case of fire, only a small amount of toxic gases is evolved and the ash, which consists of silica, is electrically insulating in contrast to the ash from polyurethane and epoxy.
Limitations for silicone rubber include a very high price, high water permeability and, in comparison with epoxy and polyurethanes, relatively poor mechanical properties. The latter, however, does not always have to be a disadvantage, among other things it can facilitate repair of molded-in components.
Polyurethane and epoxi
The materials that most closely compete with polyurethane is epoxy. Both have their advantages and their limitations, which material is best depends entirely on the area of use.
However, compared to epoxy, polyurethane has the following advantages:
- Greater possibilities for variation.
- Lower heat generation during curing.
- Lower shrinkage during curing, which results in lower shrinkage stresses.
- On average, better electrical impact strength.
- Shorter curing time.
However, epoxy has lower water absorption, higher volume resistance and lower dielectric constant than polyurethanes.
Important electrical properties
Important electrical properties include volume and surface resistivity, dielectric constant, electrical breakdown strength, dielectric loss factor and arc resistance
Other important properties for grouts include low flammability, insulating ability after fire, water vapor permeability, corona resistance, ozone resistance, moisture absorption, aging resistance and good mechanical properties. Self-extinguishing polyurethanes corresponding to UL 94 VO can be obtained by mixing, among other things, aluminum trihydrate into the casting compound.
Like the mechanical properties, the electrical properties change more or less with the surrounding environment, frequency and aging.
Under compressive load, rubber behaves like a non-compressible liquid – when rubber is compressed, the shape changes but not the volume. In contrast to the liquid, the rubber, on the other hand, more or less regains its original shape. These properties and the construction of the rubber part affect how much it is compressed under a certain load. The fact that rubber is not compressible must be taken into account in the design. Solid rubber must always have the possibility of bulging out under pressure loads and must absolutely not be closed inside.
Pressure loads and tension load
Rubber is mostly used under compressive loads and most types of rubber, with the exception of urethane rubber, silicone rubber and EPDM rubber, have a significantly shorter service life under tensile load than under compressive load. How the rubber behaves under compressive load is of great importance for its function. An important property is how much the rubber is deformed under a certain load. Some deformation may be desirable, for example when using rubber for vibration dampers
The polyurethanes can be made from very soft to hard and therefore fill the gap between rubber and plastic.
By foaming the polyurethanes, e.g. microcellular polyurethane of harder originating materials can replace ordinary softer rubber and provide the same elastic suspension and strength.
One of the advantages is that microcellular polyurethane, in contrast to rubber, is compressible, i.e. the volume decreases under compressive load. The figure above shows the relationship between polyurethane and rubber, as well as comparisons with other materials to illustrate the possibilities of polyurethane.
Wear resistance for different materials
It is difficult to compare the abrasion resistance of different materials. The choice of material is best solved through practical tests or previous experience. Laboratory tests should be used with careful judgment.
The values in the table should only be used as a rough guide.
| Relative wear resistance | |
|---|---|
| Styrene plastic | ca 30 |
| Amidplast 66 | ca 6 |
| HD ethylene plastic | Ca 19 |
| Tetrafluoroethylene plastic | Ca 5 |
| Epoxy plastic | ca 16 |
| Polyurethane | about 0,5-0,8 |
| Rubber | about 0,6-1,9 |
| Aluminium | Ca 5 |
| Steel (high-strength) | about 0,5-0,7 |
| Wrought iron | Ca 1 |
The lower the number, the better the wear resistance. Test conditions: abrasive particles approx. 1.1 mm, speed 3.55 m/s.
Tear resistance increases with hardness
This is particularly true for the ether urethanes, and together with the different choices of suitable polyol and high hardness, they become almost as tear-resistant as the polyester urethanes. Also in this case, an increasing number of hydrogen bonds in the polyurethanes is a contributing factor. However, the tear resistance of both the polyether urethanes and the polyester urethanes can vary greatly at the same hardness. For example, the polyether urethanes based on propylene glycol have a significantly lower tear resistance than those based on polytetramethylene glycol.
Influence of temperature on tear resistance
More or less all polymeric materials have reduced tear resistance with increasing temperature. At room temperature, polyurethanes have significantly better tear strength than natural rubber. At about 100 degrees, the usual cast polyurethanes and natural rubber have approximately the same tear strength and above 100 degrees, natural rubber can even have better tear strength. However, there are both cast and vulcanized polyurethanes, which have better temperature properties than the usual types. The tear resistance of the thermoplastic polyurethanes is even more sensitive to temperature rise than the cast ones. Exceptions include those that are cross-linked by irradiation after injection molding. Tear resistance also decreases with age.
Figure 14. Relative tear resistance of some materials as a function of temperature.
A = Polyester urethane
B = Natural rubber
C = Chloroprene rubber
D = Nitrile rubber
The high cutting strength of the polyurethanes combined with the compressive load capacity makes the material interesting in, for example, punching and figure cutting of sheet metal blanks, by using steel rulers, which work against a punching base of polyurethane. This means relatively simple and inexpensive tools for punching sheet metal details in small and medium-sized series.
Under compressive load, rubber behaves like a non-compressible liquid – when rubber is compressed, the shape changes but not the volume. In contrast to the liquid, the rubber, on the other hand, more or less regains its original shape. These properties and the construction of the rubber part affect how much it is compressed under a certain load. The fact that rubber is not compressible must be taken into account in the design. Solid rubber must always have the possibility of bulging out under pressure loads and must absolutely not be closed inside.
Pressure load and tension load
Rubber is mostly used under compressive loads and most types of rubber, with the exception of urethane rubber, silicone rubber and EPDM rubber, have a significantly shorter service life under tensile load than under compressive load. How the rubber behaves under compressive load is of great importance for its function. An important property is how much the rubber is deformed under a certain load. Some deformation may be desirable, for example when using rubber for vibration dampers.
Den låga sprödpunkten betyder att mjuka polyuretaner knappast går att slå sönder vid temperaturer över ca -50. Vid ca -50 har även de hårdare polyuretanerna (>70 Shore A) samma slagseghet som acetalplaster och avsevärt bättre slagseghet än amidplast 6 och amidplast 66. Vid rumstemperatur kan hårda polyuretaner ha upp till 5-8 gånger högre slagseghet än amidplast 66 och amidplast 6 samt ca 10 gånger bättre slagseghet än acetalplaster.
Det beror dock på hur polyuretanerna är uppbyggda. Det går att göra polyuretaner, som har en mycket hög slagseghet eller sådana, som har en mycket låg slagseghet.
| Elastomertyp | Hårdhet Shore A | Sprödpunkt |
|---|---|---|
| Naturgummi | 71 | -56 |
| SBR-gummi | 72 | -50 |
| Kloroprengummi | 62 | -42 |
| Polyetenadipaturetan | 80 | -50 |
| Adiprene L100 | 88 | < -62 |
| Poly-E-kaprolaktonuretan | 60 | < -75 |
Under compressive load, rubber behaves like a non-compressible liquid – when rubber is compressed, the shape changes but not the volume. In contrast to the liquid, the rubber, on the other hand, more or less regains its original shape. These properties and the construction of the rubber part affect how much it is compressed under a certain load. The fact that rubber is not compressible must be taken into account in the design. Solid rubber must always have the possibility of bulging out under pressure loads and must absolutely not be closed inside.
Compression load and tensile load
Rubber is mostly used under compressive loads and most types of rubber, with the exception of urethane rubber, silicone rubber and EPDM rubber, have a significantly shorter service life under tensile load than under compressive load. How the rubber behaves under compressive load is of great importance for its function. An important property is how much the rubber is deformed under a certain load. Some deformation may be desirable, for example when using rubber for vibration dampers.
Polyurethanes have about 10-21 times greater coefficient of thermal expansion than steel. This must be taken into account in the design process, so that space is allowed for the polyurethane material to expand when heated.
SHRINKING
Most of the shrinkage is due to the coefficient of thermal expansion and only to a small extent to chemical contraction. The linear shape shrinkage for cast urethane systems is between about 1.4-2.2% depending on, among other things, composition and reaction temperature.
In some critical cases (complex molds), however, the slight chemical contraction can give rise to internal cracks before the material has a sufficiently high strength.
By lowering the mixing temperature and the mold temperature about 6-9 celsius and increasing the oven temperature 6-9 celsius, you can instead make the urethane rubber expand slightly and thereby prevent the appearance of internal cracks.
The shape shrinkage also depends on the wall thickness and hardness. For injection molded thermoplastic polyurethane, it also applies that the mold shrinkage is strongly dependent on the injection molding pressure. In addition, post-conditioning affects (applies to all polyurethanes).
The shape shrinkage must be especially considered when combining polyurethane with metals or ceramics.
Like everything else, urethane elastomers age. Aging is caused by water, heat, light, oxygen, chemicals, fatigue, microorganisms, mechanical attacks, etc. The types of aging can be divided into purely mechanical aging (e.g. fatigue), thermal decomposition, thermo oxidative decomposition, photooxidative decomposition, radiolysis, acidolysis, hydrolysis, microbiological attacks etc. It is usually a combination of several degradation mechanisms. One of the most common causes of severe degradation of certain polyurethanes is hydrolysis, which is caused by water and heat together. (Hydrolysis is Greek and is formed by hydro = water and light = decompose).
It is possible to achieve very tight tolerances through extremely accurate casting tools and special machining.
However, one must keep in mind that the tighter the tolerance, the higher the cost. Therefore, unnecessary tight tolerances should be avoided.
Always consult with us regarding the desired function, so that we can offer the most cost-effective solution.
Dimensional accuracy for polyurethane differs from metal mainly in two points:
- Elasticity – Polyurethane can deform 100 times more than metal under normal load.
- Thermal expansion – Since polyurethane has 10 times higher thermal expansion than metal, the dimension depends a lot on the temperature. A detail part that is 1000 mm at room temperature, becomes 1010 mm at + 60 ° C.
UW-ELAST applies Standard SS-ISO 3302-1 for dimensional tolerances.
ADIPRENE
Uniroyal’s trade name for polyurethane based on toluene diisocyanate and polyether glycols.
ALLOFANATE GROUPS
Formed by reaction between isocyanate groups and urethane groups.
AMINER
Ammonia derivatives where one or more hydrogen atoms in ammonia have been replaced by carbonaceous radicals. Amines are used, among other things, as chain extenders (hardeners) and catalysts in the production of polyurethanes.
ALIFATER
Acyclic compounds in which the carbon atoms are attached to each other to open, straight or branched chains.
ALIFATIC ISOCYANATES
Isocyanates based on aliphatic compounds.
AROMATS
Homocyclic compounds with six carbon atoms in the ring, which are unsaturated. The aromatics may consist of several such rings. The simplest aromatic compound is benzene.
AROMATIC ISOCYANATES
Isocyanates based on aromatic compounds. They are cheaper than aliphatic, but discolored with aging.
ANTIOXIDANTS
Chemical compounds that are sometimes added to prevent oxidation of, among other things, polyurethane.
ELONGATION AT BREAK
The elongation when the sample fails under load.
USE TIME
“Pt-life”, the time a blend of prepolymer and chain extender is castable.
BUTANDIOL
Difunctional alcohol, which is used as a chain extender in the manufacture of polyurethanes.
CASTOMER
Baxenden Chemicals brand name for a series of urethane prepolymers.
HYDROGEN CYANIDE
Extremely powerful poison. Can be formed by heating polyurethanes and isocyanates.
DIISOCYANATES
Contains two isocyanate groups (see isocyanate). O=C=N-R-N=C=O.
TENSILE STRENGTH
The highest tensile stress a material can withstand before it breaks.
ELASTOMERS OR ELASTS
Collective name for rubber and thermoelastics. According to ISO 1382 “polymeric material, which quickly returns to almost original dimensions and shape upon unloading after being subjected to severe deformation by the action of low mechanical stress.”
ELASTICITY MODULE
E-module, Young’s module provides the relationship between stress (σ) and elongation (ε). For practical use, steel follows Hooke’s law E = σ / ε. Polymeric materials follow Hooke’s law only at very low elongations.
ELASTICITY
The ability of the molecular chains to return to their original position when loading ceases.
ESTERGRUPPER (-COOR) –
Occurs in polyester urethanes. Provides good mechanical properties, but can impair the hydrolysis resistance.
ETHER GROUPS -O-
Provides good hydrolysis resistance in polyurethane systems, but especially soft polyurethanes have lower mechanical properties than the corresponding polyester urethanes.
“GREEN STRENGTH”
It refers to the solidity of a material when the mold is removed.
RUBBER
Elastics, which are crosslinked or can be crosslinked, so that it is practically insoluble (but can swell) in boiling solvents, including benzene and methyl ethyl ketone.
HYDROPHIL
Opposite to hydrophobic.
HYDROPHOBIC
Water repellent.
HYDROLYSIS
Comes from Greek hydro = water, lys = decompose. Some polyester urethanes are easily hydrolyzed by hot water or water vapor.
HYDROLYSIS STABILIZER
Carbodiimides, which are added to polyester urethanes to delay the hydrolytic degradation.
HYDROXYL
Reactive group -OH
HARDENER
Chain extender, used to harden prepolymers to polyurethane. Multifunctional amines and glycols are used as hardeners.
HARDNESS
The ability of the surface to withstand penetration. Measured for polyurethanes most often in Shore A or D. There is a certain connection between E-modulus and hardness.
ISOCYANATER
Reactive groups – N=C=O, which reacts with hydroxyl groups (-OH) to urethanes and with amine groups (NH2) to urea (carbamide).
LEAVENING AGENT
Used in the manufacture of cellular plastics. Leavening agents for polyurethanes are hydrogen fluorocarbon compounds, hydrogen fluorocarbons and carbon dioxide (formed by the reaction between isocyanate and water).
CATALYSTS
Substances that accelerate a chemical reaction without being consumed by oneself. For polyurethane production, amines and tin salts are used as catalysts.
CHAIN EXTENSION
See hardener.
CHAIN LENGTH
The length of the polymer chains. The mechanical properties improve with increasing chain length.
COMPRESSIBILITY
Rubber materials are practically considered incompressible. At high pressures, however, the compressibility must be considered especially for polyurethanes and silicone rubber.
NITROGEN OXIDES
Dangerous to health. Formed during the combustion of polyurethanes and isocyanates.
GLUE
Liquid Injection Molding.
MDI
Diphenylmethane diisocyanate. An aromatic diisocyanate for the production of solid and cellular polyurethanes. Not as volatile as TDI.
ABRASION RESISTANCE
The ability of a material to withstand abrasion (wear). Distinguish between abrasion parallel to the surface and “abrasion” caused by incident goods at a large angle of incidence.
POLYMER
Comes from Greek poly=many and more=unit, i.e. large molecules.
POLYURETHANE
Polymer containing urethane groups.
POT-LIFE
See service life
PREPOLYMER
Unpolymerized product.
RIM
Reaction Injection Molding=reaction casting. Often used only for high pressure casting.
R RIM
Reinforced Reaction Injection Molding. Reaction casting of reinforced polymers.
IMPACT RESISTANCE
A material’s ability to withstand impact stresses
SILICONE OIL
Frequently used release agent for polyurethane. Causes adhesion problems during gluing and painting.
SLITAN
UW-ELAST´s brand name for a series of polyether and polyester urethanes.
Read more about Slitan.
VOLTAGE
Denoted σ and is the force F divided by the area A. Often expressed in MPa.
DEFORMATION
Remaining deformation after loading.
THERMOELAST
Elast in which the cohesive forces necessary for the elastic deformation of the material are of a physical nature and thus can be eliminated by heating, whereby the material becomes plastically malleable at elevated temperature to return to its highly elastic state upon cooling.
TOLUENDIISOCYANAT
Common aromatic diisocyanate for the production of solid and cellular polyurethanes. Due to the volatility and health risks, a polyurethane is often manufactured first.
TREKOLLAN
Trekollan is partly a polyurethane material, but also a former company that is now part of UW-ELAST AB.
Read more about Trekollan.
VISCOELASTICITY
Polymers return, with some time delay, to its original shape after loading. The viscoelastic part is mechanically reversible, but thermodynamically irreversible.
VULKOLLAN
Bayer’s trade name for a polymer based on naphthalene diisocyanate and polyester glycols.
Read more about Vulkollan.
UREA GROUPS- -NHCONHR
Formed by reaction between isocyanates and amine groups NH2, Also called urea.
URETAN GROUPS- -NHCOOR
Formed by reaction between isocyanates – N=C=O and hydroxyl groups -OH.
URETAN PREPOLYMER
Reactive viscous liquid, usually isocyanate terminated. Provides, among other things, lower health risks than monomeric isocyanates.
VIBRATHANE
Uniroyal’s brand name for a series of castable polyurethanes.
Polyurethane for a wide variety of industries
Marine and offshore industry
UW-ELAST AB regularly supplies products to the offshore industry as well as companies operating in the marine sector.
We often work with specially developed materials that are made for a tough humid environment. Our polyurethane material Slitan™ meets the high expectations of hydrolysis resistance, wear and operating times.
Preventing corrosion problems by spray coating or molding products into polyurethane is common.
Below is a number of examples of products we have delivered:
Rollers for cable laying, Winch drums, Damping elements, Klyssrullar, Klyssplåtar, Wireclamps, Cable holders, Scooters, Bending limiters, End protection, Lock seals, Corrosion protection etc.
Wireclamp with internal polyurethane coating.
Dynamic Bend Stiffener.
Ready for transport to customer.
Static Stiffener.
UW-ELAST AB delivers dynamic and static Bend Stiffeners to Nexans, among others.
We have been delivering thousands of static Bend Stiffeners for several years.
After several years of preparation with design, development and calculations as well as verifying testing of both steel components and high-quality polyurethane material, we have become an approved supplier to one of the world’s leading suppliers of equipment for offshore and power transmission, namely Nexans A/S.
Steel and Aluminium
UW-ELAST AB is a large supplier to the Steel & Aluminum industry when it comes to roll coating, coating of rollers and wheels and a number of other products. Since the demands are great on minimizing the scrapping of finished sheet metal, we mold very different protections in the form of lay-ups and lifting devices for coils. Our polyurethane material SlitanÒ meets the high expectations for durability and abrasion resistance that the industry requires.
Below are examples of departments to which we regularly deliver as well as examples of different rollers and other products.
Departments:
- Cold rolling mill
- Continuous annealing line
- Picking line
- Hot-dip galvanizing
- Electrolyte line
- Tinning line
- Chrome plating line
- Slitting line
- Clip line
- Paint line
Examples of products and solutions:
Cylinders/Rolls, Tow rollers, Brake rollers, S-rollers, Friction rollers, Contact rollers, Crawler rollers, Tension rollers, Feed rollers, Wiper rollers, Paint rollers, Hold-down/tumbler rollers etc.
Other examples:
Roller stands, Winders, Lifting equipment, Truck wheels, Wear plates, Blasting protection, Splash rings etc..
Vehicle Industry
UW-ELAST AB provide the automotive industry with, among other things, coatings on lifting tools to prevent paint damage. Our sprayed polyurethane material is abrasion-resistant and very impact-resistant.
Equipment for handling tools, lifting hooks, workbench guards, dampers, spacers, etc. is relatively easy to coat with this method. As spraying can be done on irregular shapes, the area of use is very large.
We also have mobile equipment to be able to spray products at our customer’s facilities. This is suitable when you do not have the opportunity to send the part to us, and when you do not have the time for a longer production stop.
Our molded polyurethane can replace other products
Our cast polyurethane, SLITAN®, is widely used to replace existing products, produced in other materials. Together with you as a customer, we can also develop old and new products.
Transport and Handling Industry
Transport of goods and products is a large part of the industry today. Damage that occurs as a result of trasportation usually entails large costs, both for the supplier and the customer.
With simple agents and products made of our polyurethane material SLITAN®, many injuries can be avoided. Protection on truck forks, on the pavement in transport tracks, edge protection etc. prevents impact and shock damage.
The vehicles that handle transport can also be protected with reversed protection for both the truck and the loading ramp.
Machine Manufacturing
UW-ELAST AB delivers products to machine manufacturers in many different industries.
We are often involved already at the design stage and can thus help and design the product and it’s functionality in the best way possible. There are many parameters that affect the choice of material, so feel free to consult us.
Below are examples of products that we regularly deliver to machine manufacturers:
cylinders, Wheels, Dampers, Springs, Lifting Tools, Blasting Protection, Wear Protection, Nozzles, Tightenings, Holders, Carriers, Coupling Elements, Cyclones, Push Catches, Ejectors etc.
Mining Industry
Polyurethane from UW-ELAST AB has a high impact strength and excellent abrasion resistance, which makes these materials useful in environments that place high demands on these properties.
One of these environments is the mining Industry, to which we provide products for ore processing plants.
Product example: Grind stone outlet
Paper and Cellulosa
UW-ELAST AB is a major supplier to the Paper & Cellulose industry.
Departments:
- Paper machine
- Debarking facility
- Dissolution plant
- Wheelchairs
- Sheet machines
- Conversion machines
- Mass handling
- Wood chip preparation
- Handling machine
- Sedimentation
Examples of products we have delivered to the paper and cellulose industry:
Backpressure cylinders, articulated rollers, press rollers, retraction rollers, soft rollers, drive drums, support rollers, clamping blades, pump linings, vessel cladding, sedimentation wheels/scrapers, scrapers etc.
UW-ELAST AB delivers products in our own patented material SLITAN® to many different applications in the wood industry.
Our polyurethane is extremely resistant to abrasion and can withstand continuous blows and shocks.
- Planing mill
- Sawmill
- Particleboard manufacturing
- Timber sorting
- Debarking
Examples of products for the wood industry:
Contact rollers, Shock protection, Dampers, Glue spreader rollers, Feeding cylinders, Wheels/Rollers, Carriers, Scrapers, Lifting tools, Painting rollers, Grinding rollers, Glue pressing cylinders, Debarking drums etc.
Design and Fashion
Design & Fashion is an industry that is constantly changing, but strives for products that last a long time, can withstand wear and tear and harsh environments. UW-ELAST AB develop products together with you as a customer to meet the necessary requirements. The collaboration with our customers often lasts over a long period of time.
EXAMPLES OF POLYURETHANE PRODUCTS IN DESIGN AND FASHION
Designed chairs in beautiful blue colors. Support for doors, sign supports, tabletops, furnitures, dampers, edge protections, shock impacts and rope protections during assembly/manufacturing etc.
