Rubber compounds. SILICONE COMPOUNdS.

Custom engineered solutions for your applications

Rubber is used virtually everywhere. There is hardly a material that has contributed as much to the progress of technology and modern industrialization as rubber. It has also led to revolutionary developments in many other fields and has become a standard feature of everyday life.

Rubber is used virtually everywhere. There is hardly a material that has contributed as much to the progress of technology and modern industrialization as rubber. It has also led to revolutionary developments in many other fields and has become a standard feature of everyday life. Today, rubber is an indispensable product with widespread applications, and this will not change in the foreseeable future. That is why KRAIBURG is highly committed to the continuous development of new rubber materials.

Based on following polymeres we develop compounds to meet the diverse requirements of a broad range of applications:

Natural rubber 

Advantages

  • Operating temperature range in air: -55 °C / +70 °C
  • Hardness 25 Shore A – 70 Shore D
  • Very good dynamic properties
  • High strength, elasticity, rebound resilience
  • Good resistance to water, alcohols, glycols, diluted weak acids and alkaline solutions

Areas of application

For example, conveyor belts, flexible couplings, motor bearings, bridge bearings, O-rings, seals and buffers

Styrene-butadiene rubber

Advantages

  • Operating temperature range in air: -45 °C / +90 °C
  • Hardness 20 Shore A – 70 Shore D
  • Physical properties similar to natural rubber, resistance to ageing and heat
  • Very good abrasion resistance
  • Chemical resistance similar to that of natural rubber

Areas of application

The major area of application is the tyre industry; also for shoe soles, cable sleeves, seals, hoses, roller coatings, conveyor belts, floor coverings

Ethylene-propylene-diene rubber

Advantages

  • Operating temperature range in air: -50 °C / +130 °C
  • Hardness 20 Shore A – 95 Shore A
  • Excellent resistance to ozone, ageing and weather
  • Low compression set is possible even at high temperatures
  • Very good resistance to hot water, steam, acids, alkaline solutions and hydraulic fluids with a glycol-water basis

Areas of application

Examples are seals for windows and doors, hoses for washing machines, dishwashers and water fittings, cable insulations and cable sheathings, use in drinking water, use in seal and control applications.

Butyl rubber

Advantages

  • Operating temperature range in air: -60 °C / +130 °C
  • Hardness 30 Shore A – 80 Shore A
  • Very low gas permeability
  • Good resistance to ozone, ageing and weather
  • Good resistance to hot water, acids, alkaline solutions and polar solvents

Areas of application

Used in air hoses, inner liners of tyres, pharmaceutical stoppers and pipettes, membranes, rubber-coated fabrics, vapour and chemical hoses, safety gloves, etc.

Chloroprene rubber

Advantages

  • Operating temperature range in air: -40 °C / +100 °C
  • Hardness 20Shore A – 90 Shore A
  • High flame resistance
  • Good resistance to ozone, ageing and weather
  • Good resistance to paraffinic mineral oils and greases, refrigerants such as ammonia, etc.
  • Good mechanical properties and good elastic behaviour also at low temperatures

Areas of application

For example, conveyor belts, seals, hoses, air springs, roller coatings, wiper blades, linings, cable sheathings and rubber-coated fabrics.

Chlorosulfonated polyethylene

Advantages

  • Operating temperature range in air: -30 °C / +120 °C
  • Hardness 45 Shore A – 95 Shore
  • Very good resistance to ozone, ageing and weather
  • Good to very good resistance to oxidising chemicals, organic and inorganic acids and bases
  • Good flame resistance

Areas of application

For example, cable sheathings, linings, seals, membranes, floor coverings, roofing felts, rubber-coated fabrics

Chlorinated polyethylene

Advantages

  • Operating temperature range in air: -30 °C / +130 °C
  • Hardness 60 Shore – 95 Shore A
  • Good resistance to ozone, ageing and weather
  • Good colour stability
  • Average oil resistance and flame resistance, similar to CR

Area of application

For example, for the manufacture of flame-resistant and oil-resistant cable sheathings, also for hoses.

Epichlorhydrin rubber

Advantages

  • Operating temperature range in air: -45 °C / +130 °C
  • Hardness 40 Shore A – 90 Shore A
  • Excellent ozone resistance
  • Very low gas permeability
  • Good resistance to mineral oils/greases and aliphatic hydrocarbons

Areas of application

Seals, membranes, hoses and roller coatings. Used primarily in applications requiring good resistance to mineral oils and heat in combination with low gas permeability or good low temperature flexibility.

Nitrile rubber

Advantages

  • Operating temperature range in air: -30 °C / +110 °C
  • Hardness 20 Shore A – 75 Shore D
  • Very good abrasion resistance
  • High strength (depending on filler), similar to natural rubber
  • Good resistance to oils and fuels

Areas of application

For example, oil- and fuel-resistant seals, membranes, hoses, conveyor belts, rubber-metal bonds, plastic-to-rubber bonded parts and friction linings

Hydrogenated nitrile butadiene rubber

Advantages

  • Operating temperature range in air: -30 °C / +150 °C
  • Hardness 50 Shore – 95 Shore A
  • Resistance to mineral oils, fuels and oxidising media
  • Very good resistance to ozone, ageing and weather (especially fully hydrated types)
  • High tear resistance
  • Very good abrasive properties

Areas of application

For example, numerous dynamic and static products that are subjected to dynamic and abrasive loads with exposure to heat and media, hoses and belts, industrial seals for oil field exploration and processing, as well as rolls for steel and paper factories.

Polyurethane rubbers

Advantages

  • Operating temperature range in air: -40 °C / +120 °C
  • Hardness 55 Shore A – 95 Shore A
  • High tear resistance, good wear behaviour and abrasion resistance
  • Good resistance to mineral oils and greases
  • Good resistance to ozone, ageing and weather

Areas of application

For example, seals, scrapers, gear teeth and other wear-resistant technical components, solid tyres and rolls, roller coatings, high-quality athletic shoe soles, etc.

Polyacrylate rubber

Advantages

  • Operating temperature range in air: -40 °C / +150 °C
  • Hardness 50 Shore – 90 Shore A
  • High resistance in mineral oils, additives and lubricants
  • Very good resistance to ozone, ageing and weather
  • Good compression set

Areas of application

Is used primarily in automotive and motor construction for cylinder head and oil pan seals, oil hoses, and turbocharger hoses.

Ethylene-acrylate rubbers

Advantages

  • Operating temperature range in air: -40 °C / +150 °C
  • Hardness 50 Shore A – 90 Shore A
  • Very good resistance to oil
  • Can easily be made flame retardant
  • Good damping properties
  • Very good resistance to ozone, ageing and weather

Area of application

Compounds are used primarily for the manufacture of oil-resistant compounds and cable insulations. These compounds are also used for damping elements (buffers, absorbers) and flame-proof cables (halogen-free, no caustic combustion products).

Vinyl acetate rubber

Advantages

  • Operating temperature range in air: -40 °C / +160 °C
  • Hardness 60 Shore A – 90 Shore A
  • High heat resistance
  • Good resistance to water, glycerine, ethylene glycol
  • Very good resistance to ozone, ageing and weather

Areas of application

EVM is used for the manufacture of flame-resistant, heat-resistant and weather-resistant products. Typical applications are cable sheathings, hoses, floor coverings, rubber-coated fabrics, seals and profiles for automotive and building construction.

Fluoro-rubber

Advantages

  • Operating temperature range in air: -30 °C / +220 °C
  • Hardness 50 Shore A – 90 Shore A
  • Very good temperature resistance
  • High chemical resistance (minerals, oils, greases and non-polar media)
  • Excellent resistance to ozone, ageing and weather
  • High gas tightness

Areas of application

For example, seals (shaft ring seals, O-rings, tube applications), petroleum industry: down-hole, hydraulic applications, rollers, fuel lines, coatings and compensators for flue gas scrubbers.

Silicone rubber

Advantages

  • Operating temperature range in air: -50 °C / +220 °C
  • Hardness 20 Shore A – 90 Shore A
  • High resistance to ozone, ageing and weather
  • High heat resistance
  • Resistant to mineral oils (not aromatic), diluted acids and alkaline solutions, alcohols and ketones.

 Area of application

Food contact: for example valves in food production, coffee maker seals, transport hosesDynamic applications: absorbers, membranes, etc.Special applications: nipples for baby bottles, rollers, etc.

Fluoro-silicone

Advantages

  • Operating temperature range in air: -65 °C / +200 °C
  • Hardness 40 Shore A – 80 Shore A
  • Very good thermal stability
  • Very good low temperature flexibility
  • Excellent resistance to ozone, ageing and weather
  • Good resistance to oils and hydraulic fluids

Areas of application

Special seals for the automotive and aeronautics industry with fuel contact, which require excellent low temperature properties.

Perfluoro-rubber

Advantages

  • Operating temperature range in air: -5 °C / +320 °C
  • Hardness 75 Shore A – 85 Shore A
  • High stability against aggressive media and in polar/non-polar media
  • Reliable in static and dynamic applications

Areas of application

Ideal for demanding seal applications, whenever the customer needs high-quality parts such as O-rings. The unique properties of this material help to maintain seals, which can result in less maintenance, reduced operating costs and improved safety. Only seal elements made of perfluor-elastomer achieve the virtually universal chemical resistance of PTFE, without having to miss the typical sealing, resilience (compression set) and creep resistance of rubber.

You have not found the ‘right’ product yet?

Do you have specific questions about our mixtures or do you need advice and assistance?

Send us a short message via the inquiry form or by e-mail, we will be happy to take care of your request.

Or just give us a call +49 8638 61 – 0.

Our product.

KRAIBURG continually tries to set new standards in technology, quality, manufacturing, delivery performance, customer relations and service. Our highly customized and cost-effective solutions far exceed the current standards. As a leading worldwide manufacturer of state-of-the-art rubber and silicone compounds, we have continually innovated and evolved our range of products.

From concept to creation, we support our customers by providing an unbeatable combination of experience and expertise. Our sales force provides customers with the breadth of knowledge related to our products to help them make informed decisions. KRAIBURG applications engineers have significant expertise in specific product solutions, and our product engineers provide detailed technical product knowledge.

Each of these roles play an integral part in helping customers achieve their goals.

We have more than 10,000 sq. m. of facilities with the following capacities:

  • 5 mixer lines (3 for black / 2 for colored compounds)
  • Strained and extrusion technology
  • Fully integrated production process
  • Colored and bright compounds
  • Strainer and extrusion technology
  • Roller head technology

Our sectors.

As a creative and innovative partner we offer our customers top-quality products and processes as well as excellent service for their lasting success. Our company has always lived a culture that includes close and trustful cooperation with our customers and partners.

With its innovative compounding solutions, KRAIBURG is the leading specialist for the development and manufacture of rubber and silicone compounds that fulfill the most stringent requirements.
The proximity to the customer, the know-how of our specialists and our high level of material competence are firmly established aspects of our broad portfolio.

Automotive
Food Industries
Chemical Industries
Composite System KRAIBON®
ROLL COATING
WATER AND GAS
AEROSPACE
RAILWAY
WIND ENEREGY
MECHANICAL ENGINEERING
OIL & GAS

AND MORE….

JUST ASK US!

auto

‘Stable and high-quality function – compliant with specifications’

As an experienced, reliable partner of the overall supply chain, we produce tailor-made solutions for the automotive industry in close collaboration with our customers.

Applications of our compounds are specification-compliant, integral and indispensable parts in system components and make an essential contribution to their stable and high-quality function.

KRAIBURG compounds are used in the following application areas:

  • Under the hood
  • Interior
  • Exterior
  • Motor chassis / Chassis / Drive unit

food

The food industry comprises a variety of applications requiring tailored specifications. The product diversity and use of numerous aromas can have a vast range of effects on elastomer components. In addition, plants are subject to more and more extreme conditions, which has the consequence of more frequent product replacement and cleaning cycles.

In addition to elastomers in food quality, Gummiwerk KRAIBURG also offers a new sulphur-crosslinked compound series, KRAIBURG Pure. They have been approved in accordance with various European standards, such as W270, WRAS and ACS. The formulation also meets the requirements of the positive list for aqueous foodstuffs in accordance with the FDA.

Applications in which KRAIBURG compounds are used:

  • Rubber materials and articles used in food production
  • Drive rollers for conveyor belts
  • Seals in lines
  • Rubber teats/calf teats for the dairy industry
  • Valves for the food industry
  • Seals for dispensing plants for the beverage industry

chemie

“High-performance materials with high durability”

Reconciling regulatory requirements with higher productivity is never a simple matter. Applications in chemical processing require high-performance materials with important characteristics, such as resistance to various aggressive chemicals, as well as extremely high and low temperatures. The mechanical strength also plays an important role.

Applications in which KRAIBURG compounds are used:

  • Seal elements in chemical reactors
  • Pumps in waste management plants
  • Sensor casings in analytical and industrial measuring technology
  • Metering elements in the chemical industry

kraibon

KRAIBON® is a thin film made of non-crosslinked natural rubber which hardens together with resin in the existing manufacturing process.

The result is a composite material that combines the best elements of fibre composite materials and elastomers. The direct integration of elastomers into the fibre reinforced plastic (FRP) layers makes it possible to create an alternating structure of hard and soft material that combines the good mechanical properties of FRP with the good “elastic” properties of the elastomer. The main areas of application are optimisation of acoustics, and impact and splintering protection.

The key advantage is the direct integration of elastomers. The ordinary production process of an FRP component remains the same – no additional bonding agents are necessary. This innovative technology is purposefully used in sectors like the automotive and sport industries, aerospace, rail vehicles and even in orthopaedics.

More details are available here.

walze

With our sector-specific and application-oriented experience, we have comprehensive expertise in the development of compounds for surfaces.

We produce rollers for the mechanical engineering sector, the steel and metal industry, foil production and refinement, the printing industry, the plastics industry, the paper industry, and many others.

Roller coatings for printing/coating of materials

  • Flexo printing sleeves
  • Intaglio printing pressure rollers
  • Adhesive application rollers
  • Paint rollers
  • Roller coatings for textile production
  • Squeeze rolls in chemical baths
  • Roller coatings with special surface properties
  • Embossing rolls
  • Feed rolls

wasser

High statutory requirements stipulate the quality of drinking water. Operators of water purification plants are responsible for ensuring the secure supply of the population and complying with the statutory boundary conditions. Alternating quality of the untreated water and protection of water resources from contamination repeatedly pose new challenges for operators.

We offer an innovative and efficient solution to this for the drinking water market. As a result, at the end of 2018 KRAIBURG developed the compound series KRAIBURG Pure, which can be used in Elastomers for drinking water applications also after 2021.

Our solutions are used in the following products:

  • Components / seals in gas supply lines (NBR)
  • Seals / membranes (EN 549) in gas devices and systems (NBR)
  • Seals, wedges, shut-off valves in the drinking water supply (cod water, sulphur-crosslinked EPDM)
  • Components in drinking water fittings (cold and hot water, perox. EPDM)

KRAIBURG Pure - Certified Compounds. For the future.

You can find more information here or simply contact our specialists.

luft

‘Reliable even in extreme conditions’

Production for the aerospace industry is an especially demanding task on all levels of the supply chain – from the original equipment manufacturer (OEM) to the supplier.

Good electrical insulation properties, high temperature-resistance, elasticity over wide temperature ranges and high flame resistance – all of which are indispensable properties for aerospace applications.

Solutions from KRAIBURG are used in the following products:

  • Silicone rings in a compressor stage in the power unit area for aircraft
  • Sealing systems in the rotor blade of a helicopter
  • Use in a fuel discharge system
  • Elastomer connection to FRP in the collar area of a water tank
  • Cladding/thermal insulation between an exterior FRP skin and a combustion chamber
  • Flooring and lightweight air freight containers

bahn

Highest quality, reliability and energy-efficiency are three key requirements that products must fulfil for use in railway traffic. In the process, the durability of the materials, which are often exposed to temperature fluctuations, is extremely important.

GUMMIWERK KRAIBURG has developed system solutions and materials that are designed especially for these conditions. Consequently, maintenance costs can be reduced over the entire life cycle.

KRAIBURG has a proven track record as a reliable partner of the railway sector.

Our Solutions are used in the following products:

  • VMQ compounds (in accordance with UNI CEI 1170-3, UNI CEI EN 45 545, BS 6853) for internal and external components of the carriage
  • VMQ compounds (in accordance with EN 50382-2, NFF63-827) rail vehicle cable for high temperatures
  • Elastomer fireproofing compound certified in accordance with EN45545 R1HL3
  • Underfloor protective impact panel in a rail vehicle produced in elastomer fibre composite honeycomb panel

wind

Wind energy is the world’s most thoroughly developed alternative energy sources. Its growth is promoted by rising oil prices, greater environmental awareness and increasing energy requirement.

The efficient use of the natural force of wind through innovative technologies and systems is therefore an exciting challenge for manufacturers and service/maintenance companies.

For this purpose, we offer our customers specially developed compounds for products such as seals. In addition, we have developed a new system solution for erosion protection of rotor blades.

maschinenbau

The mechanical engineering sector is a global and very dynamic market. Conforming to the requirements of OEMS and suppliers and developing a product and service offering that makes the customer more competitive is our goal. Not only is efficiency emphasised, the quality and performance of the machine are also a central focus.

Gummiwerk KRAIBURG compounds are used both in standard applications and also in advanced components that are subjected to high service temperatures and / or aggressive media.

Our Solutions are used in the following products:

  • Cladding for pipelines
  • Pneumatic and mechanical pinch valves
  • Hydraulic seals
  • Valves in automation technology
  • EPDM and FKM-based compensating elements

bop

Extraction and processing of oil and gas are elaborate and require specific technologies. Wide-ranging and highly complex systems must function efficiently and reliably under extreme environmental conditions. Components such as seals, O-rings and tailor-made rubber components must be protected against heat, cold, humidity, temperature fluctuations, corrosion and UV radiation, depending on the installation location.

We support you with application-specific compounds with which process safety is the central focus. This includes particularly robust solutions which have been approved in accordance with all common standards for demanding applications.

KRAIBURG compounds are used in the upstream, midstream and downstream sectors of the global oil and gas Industry.

Our Solutions are used in the following products:

  • FKM and FFKM compounds for O-ring and V-ring fittings, drills, stators, heat exchangers and oil seals
  • Components in the upstream sector (oil/gas extraction), midstream (transport) and downstream (oil and gas refinement)
  • Power sections (NBR, HNBR)
  • Blow-out preventer (annular elements, seals) (NBR, HNBR)
  • Rubberised pipes (NBR, HNBR, EPDM, FKM)
  • Pump pistons