SFERE IN RESINA FENOLICA
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Settori di impiego
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Pompe e valvole speciali, industria informatica (mouse), palle da gioco (biliardo, bowling, giochi da tavolo).
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Nome tecnico
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Nome d'uso
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Abbreviazione
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|---|---|---|
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Resina fenolica
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Resina fenolica
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-
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Proprietà
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Simbolo
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U.d.M.
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Tipo
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Note
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Valori
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|---|---|---|---|---|---|
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Densità
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δ
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[g/cm3]
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Fisica
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Temp. ambiente
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1,70
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Modulo di Young
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E
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[MPa]
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Meccanica
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-
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3000
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Coefficiente di attrito
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µ
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-
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Meccanica
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Temp. ambiente
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0,25
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Assorbimento umidità
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Aw
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%
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Fisica
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24 h
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0,35
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Coefficiente di espansione termica lineare
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α
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[10^-6/ºC]
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Termica
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(ΔT=0-100°C)
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95
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Conducibilità termica
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λ
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[W/(m·K)]
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Termica
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Temp. ambiente
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0,25
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Resistività di volume
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ρ
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[Ω*m]
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Elettrica
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-
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> 10^9
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Permeabilità magnetica relativa
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µ
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-
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Magnetica
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Diamagnetico
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<~1
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Proprietà
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Tipo
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U.d.M.
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Valori
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U.d.M.
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Valori
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|---|---|---|---|---|---|
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Durezza
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Meccanica
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[Shore D]
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85 - 90
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-
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-
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Carico di snervamento a compressione
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Meccanica
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[MPa]
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35 - 55
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[psix10^3]
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5 - 8
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Temperature d' esercizio
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Termica
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[ºC]
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-40 / 200
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[ºF]
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-40 / 392
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Diametri (min/max)
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U.d.M.
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Diametri (min/max)
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U.d.M.
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Grado di precisione
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|---|---|---|---|---|
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12,700 - 100,000
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[mm]
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1/2 - 4
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["]
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III - IV
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Resistenza alla corrosione
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Buona resistenza a contatto con acidi e basi deboli, idrocarburi, prodotti petroliferi, alcoli, glicoli, olii minerali e grassi. Non resiste ad acidi e basi forti, agenti ossidanti, fenoli, soluzioni alcaline forti.
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More info
Phenol formaldehyde resin, also known as phenolic resin is a synthetic material made from a combination of phenol and formaldehdye.
One of the oldest synthetic plastics, they are often used in the manufacture of phenolic balls, due to the material's high resistance to abrasion and ability to withstand impacts. In addition, they also demonstrate excellent dimensional stability.
These properties make phenolic balls a popular option in valves and pumps, as well as other situations requiring flow control.
However, they are also commonly used in everyday situations. For example, phenolic balls are regularly used in snooker, pool, or billiards sets because they maintain their shine and shape under pressure so well.
They are also often found in computer peripherals, such as the mouse. In industrial settings they are commonly used in systems involving corrosive materials such as acids or bases, or hydrocarbon fuels.