TECHNICAL INFORMATION
27
Laboratory glassware and plastics
Plastics used with laboratory glass 1 To complement DURAN ® laboratory glassware products, various plastic products such as screw caps are available. Their properties are listed in the following table.
Temperature resistance range °C
EPDM
Ethylene/propylene-diene-rubber
– 45 to +150
ETFE
Partially crystalline ethylene/ tetraflouroethylene copolymer
–100 to +180
EVA
Ethylene-vinyl-acettate
– 80 to +70
FEP
Tetra-Fluor-Ethylen/Hexafluor-Propylene
– 200 to +200
FKM
Fluorinated rubber
– 20 to +200
PBT 2
Polybutylenterephthalat
– 45 to +180
PE
Polyethylene
– 40 to +80
POM
Polyoxymethylene
– 40 to +90
PP
Polypropylene
– 40 to +140
PTFE
Polytetrafluorethylene
– 200 to +260
PU 3
Polyurethane
– 30 to +135
SBE
Styrene Butadiene Rubber
– 30 to +70
TpCh260
Thermoplastic/duroplastic
– 196 to +260
TPE
Thermoplastic – thermosetting plastic
to 140
VMQ
Silicone rubber
– 50 to +200
PSU Compound Compound polyarylsulfone based
– 45 to +180
1 The details in the table relating to temperture resistance relate to standard autoclaving processes with steam and a duration of 20 minutes
2 Changes in colour may occur if exposed to tempertures above 180 °C. 3 All laboratory glasses coated with PU may only be cleaned while moist in order to avoid any electrostatic charge which may form.
Chemical resistance of plastics Classes of substances +20 °C
Alcohols, aliphatic
+ +
+ +
++ ++
++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++
++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++ ++
++ ++ ++ ++ ++ ++ ++ ++
+ + – – – – – – – – – –
+
++ ++ ++
–
+ + + – + + + + + – – –
++
Aldehydes
+
Alkaline solutions
++
++
+ + + + +
++ ++
– – –
++
Esters Ethers
+ – – – – + + + –
+ – + + + +
+ +
+ + + – – –
–
Hydrocarbons, aliphatic Hydrocarbons, aromatic Hydrocarbons, halogenated
++
++ ++
++ ++ ++
+ +
– +
Ketones
+
+
++ ++ ++
–
Acids, dilute or weak Acids, conc. or strong
++
++
++ ++
++
++ ++
++ ++
+ +
+ –
+ +
Acids, oxidising
+
–
+
+
+ + = very good resistance + = good to limited resistance – = low resistance
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