Cellulose propionate
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Cellulose Propionate – CP
Contents |
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Polymer Type
Thermoplastic
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Advantages
Relatively lower plasticiser migration than Cellulose Acetate or Cellulose Acetate Butyrate. Stiffer than Cellulose Acetate or Cellulose Acetate Butyrate. Transparent and glossy with better low temperature impact properties Cellulose Acetate or Cellulose Acetate Butyrate. Disadvantages
Lower weathering resistance than Cellulose Acetateor Cellulose Acetate Butyrate. More expensive than Cellulose Acetate or Cellulose Acetate Butyrate. Attacked by acids & alkalis and swollen by chlorinated and aromatic hydrocarbons, alcohols and ketones.
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Typical Properties
Property Value Density (g/cm3) 1.22 Surface Hardness RR94 Tensile Strength (MPa) 35 Flexural Modulus (GPa) 1.76 Notched Izod (kJ/m) 0.13 Linear Expansion (/°C x 10-5) 12 Elongation at Break (%) 60 Strain at Yield (%) 4 Max. Operating Temp. (°C) 60 Water Absorption (%) 1.8 Oxygen Index (%) 17 Flammability UL94 HB Volume Resistivity (log ohm.cm) 12 Dielectric Strength (MV/m) 11 Dissipation Factor 1kHz 0.03 Dielectric Constant 1kHz 4 HDT @ 0.45 MPa (°C) 96 HDT @ 1.80 MPa (°C) 82 Material. Drying hrs @ (°C) 2 @ 70 Melting Temp. Range (°C) 180 - 250 Mould Shrinkage (%) 0.5 Mould Temp. Range (°C) 40 - 50
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Applications
Spectacle frames, goggles, tool handles, covers for television screens, cutlery handles, lampshades, drawing aids, packaging, toys, blister packaging.
