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Rubber

BLACKROK

Applications: Hard press rolls, offset press rolls

Technical specifications

  • Hardness: 0–3 P&J
  • Thickness: 10–20 mm
  • Colour: Black
  • Maximum line load: 300 kN/m
  • Maximum heat resistance: 95°C
  • Doctoring: Carbon fibre composite blade

BLACKROK is a reliable basic rubber coating for hard press roll positions equipped with a doctor blade.

Advantages

  • Good release properties.
  • Good chemical resistance.
  • Compatible with a wide pH range.
  • Maintains its hardness in a wide temperature range.
  • Can be doctored using a carbon fibre composite blade.
  • Good wear resistance.

GREENROK

Applications: centre and press rolls, offset press rolls, shoe press counter rolls

Technical specifications

  • Hardness: 0–3 P&J
  • Thickness: 10–20 mm
  • Colour: Green
  • Maximum line load: press, 300 kN/m; shoe press, 1,500 kN/m
  • Maximum press roll heat resistance: 105°C
  • Doctoring: Carbon fibre composite blade

GREENROK is a special PTFE-filled rubber cover, specially developed for centre rolls with a steambox and a doctor blade and for hard press roll positions. The material provides excellent wear and release properties, and it can be doctored using a carbon fibre composite blade. The GREENROK cover is also an excellent choice for the hard roll of an offset press and counter rolls of a shoe press.

Advantages

  • Excellent release properties.
  • Excellent wear resistance.
  • Can be doctored using a carbon doctor blade.
  • The web does not stick even when using recycled pulp.
  • Very good chemical resistance.
  • Compatible with a wide pH range.
  • Maintains its hardness in a wide temperature range.

VRS CLEAN

Applications: breast rolls, forming rolls, lead rolls and table rolls

Technical specifications

  • Hardness: 0–3 P&J
  • Thickness: 6–10 mm
  • Colour: Green
  • Maximum heat resistance: 120°C
  • Doctoring: Metal or carbon fibre composite blade

VRS-CLEAN is a roll cover specially developed for lead rolls that require excellent cleanliness. VRS-CLEAN includes PTFE, which results in very low friction.

Advantages

  • Easy to clean.
  • Good release properties.
  • Good wear resistance.
  • Can withstand the commonly used paper machine chemicals.
  • Very low friction.

VRS-COATER

Applications: applicator rolls of all types of coating stations

Technical specifications

  • Hardness: 25–70 P&J
  • Thickness: 20–28 mm
  • Colour: Black
  • Maximum heat resistance: 100°C

VRS-COATER is an elastic cover with very good wear resistance for all coating applications. The cover delivers good film forming properties, long grinding intervals and good break resistance. The special manufacturing method provides a consistent surface for the cover and ensures operation without markings.

Advantages

  • Very good wear resistance.
  • Good chemical resistance.
  • Compatible with pH 2–10.
  • Good grindability.
  • Consistent, non-marking surface.

VRS-COATER H

Applications: applicator rolls of all types of coating stations

Technical specifications

  • Hardness: 55–60 P&J
  • Thickness: 20–25 mm
  • Colour: Green
  • Maximum heat resistance: 120°C

VRS-COATER H is a special cover for all coating applications with improved chemical resistance, thermal properties and cleanliness. The cover delivers good film forming properties, long grinding intervals and good impact resistance in case of breaks. The special manufacturing method provides a consistent surface for the cover and ensures operation without markings.

Advantages

  • Very good wear resistance.
  • Good chemical resistance.
  • Compatible with pH 2–10.
  • Good grindability.
  • Consistent, non-marking surface.

VRS-COATER LC

Applications: applicator rolls of all types of coating stations

Technical specifications

  • Hardness: 55–70 P&J
  • Thickness: 20–28 mm
  • Colour: Red/green
  • Maximum heat resistance: 100°C

VRS-COATER LC is a light-coloured alternative for the coating section applicator rolls. It is an elastic cover with very good wear resistance. It delivers good film forming properties, long grinding intervals and good impact resistance in case of breaks. The special manufacturing method provides a consistent surface for the cover and ensures operation without markings.

Advantages

  • Very good wear resistance.
  • Good chemical resistance.
  • Compatible with pH 2–10.
  • Good grindability.
  • Consistent, non-marking surface.
  • Light colour.

VRS DRIVE

Technical specifications

  • Hardness: 16–30 P&J
  • Thickness: 7.5–15 mm (15–25 mm VRS-DRIVE B)
  • Colour: Black
  • Maximum heat resistance: 100°C
  • Doctoring: Plastic doctor blade

VRS-DRIVE is a conventional and reliable roll cover for wire drive rolls and wire section forming rolls. The advanced rubber material and structure provide good friction and wear resistance properties, thereby enabling the utilisation of the full cover thickness. VRS-DRIVE B is used in blind-drilled wire drive rolls and pulp machine press rolls.

Advantages

  • Good friction properties (for plastic wires).
  • Can withstand a plastic doctor blade.
  • Excellent wear resistance.
  • Can withstand the commonly used paper machine and cleaning chemicals.
  • The material can be grooved and blind-drilled for special applications.

VRS DRIVEHYDRIL

Applications: wire and forming section drive rolls and wire section forming rolls

Technical specifications

  • Hardness: 8–25 P&J
  • Thickness: 7.5–15 mm
  • Colour: Yellow
  • Maximum heat resistance: 140°C
  • Doctoring: Plastic doctor blade

VRS-DRIVEHYDRIL is made of HNBR, a special material that offers high friction and excellent wear resistance. The cover is very well suited for drive roll positions where wire slipping or excessive wear will lead to problems.

Advantages

  • Very good wear resistance.
  • High friction.
  • Excellent heat and aging resistance.
  • Can withstand chemicals and ozone very well.

VRS-GUIDE

Applications: wood industry doctor rolls; industrial lead, drive, press and counter rolls

Technical specifications

  • Hardness: 100 ShA
  • Thickness: 5–10 mm
  • Colour: Dark grey
  • Maximum heat resistance: 85°C
  • Doctoring: Metal or carbon fibre composite blade

VRS-GUIDE is a cover with excellent mechanical properties and wear resistance. It is an economic cover option for all lead and hard press roll applications, but its key application are the wood industry doctor rolls.

Advantages

  • High mechanical strength.
  • Very good wear resistance.
  • Can withstand a metal doctor blade.
  • The hard and smooth surface stays clean.

VRS-HYDRIL

Applications: all even, grooved and blind-drilled press rolls

Technical specifications

  • Hardness: 11–35 P&J
  • Thickness: 12–25 mm
  • Colour: Yellow
  • Maximum heat resistance: 140°C
  • Maximum load: 350 kN/m *
  • Doctoring: Carbon fibre composite blade

* Maximum load depends on the roll diameter, usage conditions and cover hardness.

The VRS-HYDRIL roll covers are made of a special rubber material, which is well suited for press applications especially with particularly high heat resistance, load and line speed requirements. The VRS-HYDRIL can be grooved and/or blind drilled (-G, -B or -BG). The excellent wear resistance and material strength enable longer operating periods and large open areas.

Advantages

  • Very good wear resistance.
  • Excellent heat and aging resistance.
  • Excellent hardness stability.
  • High elastic coefficient and good flexibility.
  • Can withstand chemicals and ozone very well.

VRS HYDRIL S

Applications: all suction press rolls

Technical specifications

  • Hardness: 11–35 P&J
  • Thickness: 12–25 mm
  • Colour: Yellow
  • Maximum heat resistance: 140°C
  • Maximum load: 350 kN/m *
  • Doctoring: Carbon fibre composite blade

* Maximum load depends on the roll diameter, usage conditions and cover hardness.

The VRS-HYDRIL S roll covers are made of a special material that is well suited for conventional or Yankee dryers’ suction press rolls. VRS-HYDRIL S can be grooved and/or blind drilled, as necessary (-SG, -SB or -SBG). Excellent wear resistance and maximum heat resistance ensure longer operating periods even in fast machines as well as reliable operation and stable hardness in Yankee press and steambox applications.

Advantages

  • Very good wear resistance.
  • Excellent heat and aging resistance.
  • Excellent hardness stability.
  • High elastic coefficient and good flexibility.
  • Can withstand chemicals and ozone very well.

VRS-PRESS

Applications: all even, grooved and blind-drilled press rolls

Technical specifications

  • Hardness: 13–50 P&J
  • Thickness: 15–25 mm
  • Colour: Red/black
  • Maximum heat resistance: 100°C
  • Maximum load: 300 kN/m *
  • Doctoring: Carbon fibre composite blade

* Maximum load depends on the roll diameter, usage conditions and cover hardness.

VRS-PRESS is a basic cover for all press felt roll applications. The material can be grooved and/or blind drilled (-G, -B or -BG). The advanced rubber material combines good wear resistance with an even hardness profile, thereby ensuring a long and reliable operating period between grindings. The cover’s good dynamic properties enable a high load and speed in operation.

Advantages

  • Good wear resistance.
  • Good chemical resistance.
  • Consistent rubber quality and even hardness
  • Compatible with pH 2–12.

VRS-PRESS OPH

Applications: feltless press rolls

Technical specifications

  • Hardness: 15–25 P&J
  • Thickness: 15–20 mm
  • Colour: Black
  • Maximum heat resistance: 120°C

VRS-PRESS OPH is a special PTFE-filled rubber material, specially developed for offset press rolls. VRS-PRESS OPH has excellent wear resistance and chemical resistance. Good release properties facilitate cleaning.

Advantages

  • Good release properties.
  • Good wear resistance.
  • Good chemical resistance.
  • Excellent maximum heat resistance.

VRS-PRESS S

Applications: all suction rolls

Technical specifications

  • Hardness: 13–50 P&J
  • Thickness: 15–25 mm
  • Colour: Red/black
  • Maximum heat resistance: 100°C
  • Maximum load: 300 kN/m *
  • Doctoring: Carbon fibre composite blade

* Maximum load depends on the roll diameter, usage conditions and cover hardness.

VRS-PRESS S is designed for use in all suction press applications. In addition to suction drilling, the cover can be grooved and/or blind drilled (-S, -SG or -SBG). The advanced rubber material combines good wear resistance with an even hardness profile, thereby ensuring a long and reliable operating period between grindings. The reliable joint system ensures good adherence to the roll shell over the long operating period.

Advantages

  • Good wear resistance.
  • Good chemical resistance.
  • Consistent rubber quality and even hardness
  • Compatible with pH 2–12.

VRS-PRESS WR

Applications: winder king and press rolls, carrying rolls

Technical specifications

  • Hardness: 40–70 P&J
  • Thickness: 15–20 mm
  • Colour: Red/green/black
  • Maximum heat resistance: Up to 100°C

VRS-PRESS WR is a wear resistant rubber cover for winder king, winder press rolls and winding drums. The material can be grooved and drilled and it provides high friction, thereby ensuring uniform-quality paper rolls.

Advantages

  • Good friction properties.
  • Easy to groove and drill.
  • Vibration and noise dampening.
  • Non-marking when grooved.

VRS-RIDER

Applications: Wire press rolls, couch and seam rolls

Technical specifications

  • Hardness: 100–200 PJ
  • Thickness: 30–45 mm
  • Colour: Red/orange
  • Maximum heat resistance: 90°C

VRS-RIDER is a strong rubber roll cover with good chemical resistance for wire press rolls, couch rolls and seam rolls. Very good wear resistance for long operating periods.

Advantages

  • Can withstand mechanical stress and wear very well.
  • Good chemical resistance.
  • Compatible with a wide pH range.
  • The material can be grooved.

VRS-TAM

Applications: tambours

Technical specifications

  • Hardness: 15–25 P&J
  • Thickness: 5–15 mm, recommendation: 10 mm
  • Colour: Black
  • Maximum heat resistance: 85°C

VRS-TAM is a basic rubber cover for tambours. The tough material has high wear resistance for a long service life.

Advantages

  • An economic cover for standard applications.
  • Good wear resistance and strength.
  • Good maximum heat resistance.
  • Lower noise and vibration compared to steel.

VRS-SIZER

Applications: Foam, SymSizer and SpeedSizer rolls

Technical specifications

  • Hardness: 15–50 P&J
  • Thickness: 15–25 mm
  • Colour: Black
  • Maximum heat resistance: 100°C

VRS-SIZER is a roll cover that uses a special material designed for foam, SymSizer and SpeedSizer rolls. The material’s special microstructure ensures perfect film formation and, in turn, even sizing results. The material does not absorb water.

Advantages

  • Good wear resistance.
  • Good chemical resistance.
  • Compatible with pH 2–10.
  • Maintains its hardness at normal surface sizing temperatures.

VRS-SIZERHYDRIL

Applications: Foam, SymSizer and SpeedSizer rolls

Technical specifications

  • Hardness: 15–20–25 P&J
  • Thickness: 15–25 mm
  • Colour: Black
  • Maximum heat resistance: 140°C

VRS-SIZERHYDRIL is a roll cover that uses a special material designed for foam, SymSizer and SpeedSizer rolls. The material’s special microstructure ensures perfect film formation and, in turn, even surface sizing results. The material does not absorb water, and its very high maximum heat resistance ensures an even hardness. The achieved runs are up to 3–5 times longer compared to conventional materials.

Advantages

  • Very good wear resistance.
  • Can withstand heat, chemicals and ozone very well.
  • Maintains its hardness in a wide temperature range.
  • The material does not absorb water.

VRS-STONECOATE

Applications: hard coating station counter rolls

Technical specifications

  • Hardness: 0–3
  • Thickness: 15–25 mm
  • Colour: Black
  • Maximum heat resistance: 85°C
  • Doctoring: Metal blade

VRS-STONECOATE is an excellent choice for hard coating station counter rolls, particularly on cardboard machines. The material has excellent chemical resistance and doctoring properties, which enables using large doctoring pressures and steel doctor blades.

Advantages

  • Good chemical resistance.
  • Can withstand a metal doctor blade.
  • Very good wear resistance.
  • The surface stays clean.

VRS-WEB

Applications: colour or water forming section rolls, pick-up rolls and distributor rolls

Technical specifications

  • Hardness: 20–45 ShA
  • Thickness: 7–15 mm
  • Colour: Black
  • Maximum heat resistance: 110°C

VRS-WEB is specially designed for combatting the swelling from inks and moisturising liquids. The material maintains its dimensions and hardness very well, which ensures excellent printing quality.

Advantages

  • Can withstand various solvents and oils very well.
  • Excellent shape and hardness stability.

VRS-200R SERIES

Applications: lamination stations’ press, release and lead rolls

Technical specifications

  • Hardness: 75–95 ShA
  • Thickness: 7.5–25 mm
  • Colour: Green
  • Maximum heat resistance: 120°C

The VRS-200R series is a high-quality rubber material specially designed for lamination applications. It contains PTFE for better cleanliness and release. Excellent maximum heat resistance and release properties enable good product quality and facilitate the cleaning of the cover in case of breaks. Good wear resistance for a long service life even if the web width varies.

Advantages

  • Excellent maximum heat resistance.
  • Good wear resistance.
  • Excellent release properties.
  • Easy to clean.

VRS-200 SERIES

Applications: lamination and applicator stations’ press, release and corona rolls, drive rolls, grinding machine feed rolls and silicone coating stations

Technical specifications

  • Hardness: 60–70 ShA
  • Thickness: 10–25 mm
  • Colour: Green/black
  • Maximum heat resistance: 120°C

VRS-200 series covers are made of high-quality Hypalon rubber compound, which can withstand oxidising acids, ozone and most chemicals very well. The material has excellent wear resistance and very good maximum heat resistance. It is designed for applications where chemical stresses occur.

Advantages

  • Antistatic, non-sulfuric types available.
  • Very good wear resistance.
  • Very good ozone and chemical resistance.

VRS-300 SERIES

Applications: colour, lacquer and primer rolls

Technical specifications

  • Hardness: 40–70 ShA
  • Thickness: 10–25 mm
  • Colour: Blue/black/red
  • Maximum heat resistance: 120°C

The VRS-300 series EPDM rubber material can withstand heat, ozone and solvents, which makes it suitable particularly for lacquer, sizing, lamination and coating rolls. VRS-300 is commonly used by the plastic film industry. It can also withstand UV coating by the wood industry.

Advantages

  • Excellent surface quality.
  • Can withstand solvents, ozone and UV light.
  • Good maximum heat resistance.

VRS-300 AS SERIES

Applications: paper processing industry’s spreader rolls, colour, lacquer and applicator rolls

Technical specifications

  • Hardness: 40–70 ShA
  • Thickness: 10–25 mm
  • Colour: Black
  • Maximum heat resistance: 120°C

The VRS-300 AS series EPDM rubber material can withstand heat, ozone and solvents, which makes it suitable particularly for lacquer, sizing, lamination and coating rolls where antistatic properties are required. The softer types of VRS-300 AS function very well as covers for paper processing industry’s spreader rolls.

Advantages

  • Excellent surface quality.
  • Can withstand ozone, chemicals and UV light.
  • Good maximum heat resistance.
  • Antistatic material.

VRS-460

Applications: special conditions where extreme heat and chemical resistance are required

Technical specifications

  • Hardness: 60 ShA
  • Thickness: 10–20 mm
  • Colour: Black
  • Maximum heat resistance: 200°C

VRS-460 is suitable for special conditions where the surface must withstand aggressive adhesives, chemicals or very hot environments.

Advantages

  • Very good maximum heat resistance.
  • Excellent resistance to most chemicals, solvents, oils and ozone.

VRS-600 SERIES

Applications: colour, lacquer and primer rolls in printing machines. Press, lead, feed and contact rolls, various industries’ drive and sheet cutter rolls

Technical specifications

  • Hardness: 40–99 ShA
  • Thickness: 5–30 mm
  • Colour: Natural white/black/red
  • Maximum heat resistance: 110°C

The VRS-600 covers are used in various industrial applications where good wear and heat resistance are required. The material can also withstand petrol, oil and grease. These covers are not suitable for applications that require resistance to strong acids or ozone.

Advantages

  • Can withstand mechanical stress and wear very well.
  • Resistant to petrol, oils and greases.

VRS-700

Applications: colour and primer rolls in processing machines; seam and press rolls in winder applications; texturing and drive rolls and soft grinder contact rolls

Technical specifications

  • Hardness: 25–70 ShA
  • Thickness: 10–50 mm
  • Colour: Red
  • Maximum heat resistance: 100°C

A special polymer additive makes the VRS-700 an excellent material for oil and grease-resistant covers that require high mechanical strength particularly at low hardnesses.

Advantages

  • Can withstand mechanical stress and wear very well.
  • Resistant to chemicals, oils and greases.
  • Compatible with a wide pH range.
  • The material can be grooved.

VRS-899

Applications: anti-corrosion covers for all rolls’ shaft and roll end

Technical specifications

  • Hardness: 80 ShA
  • Thickness: 2.5–5 mm
  • Colour: Black
  • Maximum heat resistance: 100°C

VRS-899 is a special rubber that protects shafts and roll ends from corrosion. The material has very good mechanical properties and good wear resistance. This type of cover cannot be used if the cover will be subjected to mineral oils, petrol, ozone or strong acids.

Advantages

  • Excellent wear resistance, elasticity and tear strength.
  • Good chemical resistance.

VRS-1100 SERIES

Applications: sizing, corona, counter and pick-up rolls

Technical specifications

  • Hardness: 50–80 ShA
  • Thickness: 7–15 mm
  • Colour: Red
  • Maximum heat resistance: 200°C

VRS-1100 is a silicone material that has excellent maximum heat resistance and very good release properties. It is an excellent choice for sizing, corona, counter and pick-up rolls.

Advantages

  • Very good maximum heat resistance.
  • Good release properties.