Cellulose Acetate Butyrate - CAB

Polymer Type

Thermoplastic

Advantages

Better weathering characteristics than Cellulose Acetate or Cellulose Propionate.  Tougher than Cellulose Acetate. Lower moisture absorption than Cellulose Acetate.  Transparent and glossy surface finish.

Disadvantages

Attacked or swollen by many solvents including chlorinated and aromatic hydrocarbons, alcohols and ketones.  More expensive than Cellulose Acetate.

Typical Properties

Property

Value

Density (g/cm3)

1.18

Surface Hardness

RR69

Tensile Strength (MPa)

35

Flexural Modulus (GPa)

1.3

Notched Izod (kJ/m)

0.26

Linear Expansion  (/°C x 10-5)

12

Elongation at Break (%)

60

Strain at Yield (%)

4

Max. Operating Temp. (°C)

60

Water Absorption (%)

1.3

Oxygen Index (%)

17

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

11

Dielectric Strength (MV/m)

10

Dissipation Factor 1kHz

0.04

Dielectric Constant  1kHz

5

HDT @ 0.45 MPa (°C)

73

HDT @ 1.80 MPa (°C)

62

Material. Drying  hrs @ (°C)

2 @ 70

Melting Temp. Range (°C)

170 - 240

Mould Shrinkage (%)

0.5

Mould Temp. Range (°C)

40 -  50

Applications

Tool handles, panels for illuminated signs, steering wheels, goggles, bathroom fittings, decorative trim for cars and consumer durables, drawing stencils, pens, pneumatic system traps, blister packaging, laminating with aluminium foil.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

Date Added: May 7, 2001 | Updated: Jun 11, 2013
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