Properties and applications of PVDF tubes?
- Introduction of PVDF tube
PVDF tube (polyvinylidene fluoride tube), the molecular chain is closely arranged, there is a strong hydrogen bond, natural flame-resistant, crystallinity 65% ~ 78%, long-term use temperature -40 ~ 150 ℃. Its outstanding characteristics are high mechanical strength, good irradiation resistance, can be used outdoors for a long time without maintenance. It has good chemical stability and is not corroded by acids, alkalis, strong oxidants and halogens at room temperature, and is widely used in petrochemical, electronic and electrical, steel mill pickling, acid and alkali liquid transport.
PVDF tube (polyvinylidene fluoride tube) characteristics.
1 very good chemical resistance, room temperature is not acid, alkali strong oxidizing agent, halogen corrosion.
2 high impact strength, wear resistance, creep resistance, high mechanical strength and good toughness.
3 good heat resistance, non-combustible, long-term use temperature -40 ~ 150 ℃, and has a high dielectric strength.
4 has outstanding weather aging resistance, ozone resistance, resistance to ultraviolet light and nuclear radiation.
PVDF (polyvinylidene fluoride tube) performance parameters
Energy items Test conditions [state] Test methods Test data Data units
Basic properties Melt flow rate 230°C,5000g JIS K-7210 20 G/10min
Physical properties Specific gravity 30°C ASTM D-792 1.78 g/ml
Mould shrinkage Injection moulding 2.6(230) %
Mechanical properties Shore hardness ASTM D-2240 78 D scale
Tensile modulus 5mm/min ISO R-527 2280 MPa
Tensile yield strength 50 mm/min ISO R-527 59 MPa
Elongation at break 50 mm/min ISO R-527 60 %
Extrusion strength 1.5mm/min ASTM D-695 80 MPa
Bending strength 1.5 mm/min ASTM D-790 62 MPa
IZOD notched impact strength ASTM D-256 10 KJ/m2
Tensile yield strength 5mm/min ISO R-527 53 MPa
Bending modulus 1.5mm/min ASTM D-790 1540 MPa
Compression die 1.5mm/min ASTM D-695 1320 MPa
Rockwell hardness ASTM D-785 116 R scale
Electrical properties Volume resistivity JIS K-6723 1015 Ω.cm
Thermal properties Melting point 240°C,S.R.50S-1 Capirograph 12000 Poise
Heat deflection temperature 0.45 MPa ASTM D-648 156 ℃
Critical shear vate of melt fracture 240 °C Capirograph 1000 S-1
Heat deflection temperature 1.82 MPa ASTM D-648 100 °C
Linear coefficient of thermal expansion 30-80 °C TMA 17 10-5/°C
Vicat softening temperature 1000g lead ASTM D-1526 174 °C
Die sweel 240 °C,S.R.50S-1 Capirograph 1.30
Other properties Tm 10°C/min DSC 177 °C
Tc 10℃/min DSC 142 ℃
Filminh DMF 30 °C 0.85 dl/g
Tc 10 °C/min DSC 56 J/g