RUBBER COMPOUNDS. SILICONE COMPOUNDS.

Compound di caucciù: Soluzioni su misura per le vostre applicazioni

Non si può immaginare la vita quotidiana senza la gomma: la gomma è un materiale che come pochi altri ha reso possibili i progressi tecnologici e con essi la stessa industrializzazione. Ed inoltre: è protagonista di sviluppi rivoluzionari in quasi tutti gli ambiti della vita di tutti i giorni.

Anche per il futuro la gomma offrirà irrinunciabili soluzioni per una quotidianità più confortevole e sicura. Per questo attribuiamo un valore particolare al continuo sviluppo di nuovi materiali a base di caucciù. Il nostro obiettivo è seguire le dinamiche richieste dal mercato con creatività e consolidato know how tecnico.

Per ambiti d’utilizzo, nei quali i compound non sono esposti a sostanze aggressive o temperature elevate, possono essere utilizzati anche tipologie di caucciù standard come EPDM, SBR, NBR ed NR. Queste hanno buone proprietà fisiche e si lasciano lavorare facilmente.

Ma oggigiorno nell’industria si lavora sempre più spesso in condizioni estreme. In tali casi la scelta migliore ricade su elastomeri pregiati come FKM, FFKM, HNBR e VMQ.

Da oltre 70 anni mettiamo a punto compound pregiati a base di caucciù per tutti i settori d’utilizzo immaginabili – dalle giranti per pompe agli o-ring, dagli statori alle membrane: creiamo mescole individuali per le richieste più disparate dei nostri clienti internazionali.

Compound a base di gomma siliconica: La qualità più elevata per le sfide più difficili

Da oltre 35 anni produciamo pregiati compound siliconici. La loro produzione si differenzia sotto diversi aspetti da quella delle normali mescole di caucciù – e richiede tempi decisamente più lunghi.

La lavorazione avviene separatamente dai processi di miscelazione dei compound in caucciù neri e colorati. In questo modo riusciamo ad evitare contaminazioni. Il programma di mescole offre mescole nere e colorate con durezza da 30 a 90 shore. Su richiesta forniamo anche compound da meno di 40 shore. Raffreddiamo al di sotto di 40°C i rulli destinati a tramutare il silicone in lastre e successivamente a mescolarlo con sostanze chimiche ed eventualmente con sostanze coloranti. Grazie a questo raffreddamento evitiamo l’adesione del materiale. Come reticolante per la successiva vulcanizzazione misceliamo dei perossidi al compound in silicone. I compound in silicone sono molto richiesti – con outlook positivo.

Riforniamo dei segmenti di mercato, nei quali i prodotti devono resistere a temperature elevate o sollecitazioni al di fuori del comune – come ad esempio il settore automobilistico o l’industria alimentare. In KRAIBURG, in collaborazione con i nostri esperti, realizziamo il compound più adatto, su misura – anche su base siliconica.

Sviluppiamo mescole individuali per le esigenze più diverse dei nostri clienti internazionali scegliendo da una varietà di polimeri:

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 20-95 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 30-80 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 20-90 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 45-95 Shore-A
  • 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 60-95 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 40-90 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 50-95 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 55-95 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 50-90 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 50-90 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 60-90 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 50-90 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 20-90 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 40-80 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 75-85 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.

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I mercati di KRAIBURG

I compound KRAIBURG trovano applicazione nei settori e nei mercati più vari.

Vengono utilizzati come semilavorati per i più diversi prodotti finiti – dai dispositivi di protezione anticaduta alle guarnizioni per ingranaggi. Troverete qui una panoramica delle applicazioni.

IL FORMATO DI CONSEGNA PIÙ ADATTO

Per l’efficienza economica del vostro processo produttivo. Per il vostro successo.