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Rotuba H4

Rotuba H4 is a scented acetate.

Polymer Name: Cellulose Acetate (CA)

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Plastics & Elastomers Functions
Technologies

Features & Benefits

Applications & Uses

Drying Conditions

It is preferred to use desiccant dryers, at reduced temperatures and drying times. 150°F for 2 hours is a target with dew point between -20°F and -40°F. Too high of temperatures and drying times will burn out the fragrance. In the absence of a desiccant dryer, the injection molding machine hopper may be used. Tray dryers may also be used.

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Elongation (73.4°F, 50RH%)28%ASTM D638
Izod Impact Strength of Notch (73.4°F, 50RH%)2.9ft-lb/inASTM D256
Accelerated Aging (72 Hrs. Wt. Lost, 180°F)0.5%ASTM D706
Tensile Strength at Upper Yield (73.4°F, 50RH%)5850psiASTM D638
Flextural Strength at Yield (73.4°F, 50RH%)9300psiASTM D790
Flow Temperature338°FASTM D569
Modulus of Elasticity x 105 (in Flexture, 73.4°F, 50RH%)2.2psiASTM D790
Rockwell Hardness - R Scale (73.4°F, 50RH%)101ASTM D785
Soluble Matter lost (73.4°F)0.1%ASTM D570
Specific Gravity (73.4°F, 50RH%)1.29ASTM D792
Tensile Strength at Fracture (73.4°F, 50RH%)7200psiASTM D638
Water Absortion (24Hr Immersion, 73.4°F) Total2.3%ASTM D570
Deformation under load (cold flow) method A (Dry) Load 2000 psi (122°F)1%ASTM D621
Tensile Strength at Fracture (158°F, 50RH%)4100psiASTM D638
Deformation under load (cold flow) method A (Dry) Load 1000 psi (122°F)1%ASTM D621
Izod Impact Strength of Notch (-40°F, 50RH%)1ft-lb/inASTM D256

Regulatory & Compliance

Technical Details & Test Data

Mold Temperatures
  • SOFT FLOWS BELOW MS - 100°F – 140°F
  • HARDER FLOWS - 100°F – 180°F
Cycle Times
  • INJECTION (3) - 8 – 12 sec.
  • BOOSTER - 6 – 12 sec.
  • CURE - 40 – 70 sec.
Tooling

The mold vent for the tool should be .002” to .003”. If this is not the case, mold temperatures could be elevated to help drive off volatiles thereby reducing surface blushing. (180°F – 220°F)

Mold Temperature Regulation

Most molding thermolators use hot water as their medium. In the case of elevated mold temperatures as shown above, oil thermolators should be used as they can achieve high temperatures of 220°F and higher without turning to steam.