Rotuba M

Identification & Functionality

Chemical Family

Cellulose & Cellulosics

Polymer Name

Cellulose Acetate (CA)

Plastics & Elastomers Functions

Resin

Technologies

Plastics

Product Families

Plastics — Basic Thermoplastics

Cellulosics

Features & Benefits

Labeling Claims

Environmentally Friendly,

Recyclable,

Sustainable

Materials Features

Durable,

Good Productivity,

Recyclable,

Reprocessable

Applications & Uses

Markets

Consumer Goods

Applications

Consumer Goods — Housewares

Consumer Goods — Other Consumer Goods Applications

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

	Value	Units	Test Method / Conditions
Elongation (73.4°F, 50RH%)	47	%	ASTM D638
Izod Impact Strength of Notch (73.4°F, 50RH%)	5.1	ft-lb/in	ASTM D256
Accelerated Aging (72 Hrs. Wt. Lost, 180°F)	3.6	%	ASTM D706
Tensile Strength at Upper Yield (73.4°F, 50RH%)	3400	psi	ASTM D638
Flextural Strength at Yield (73.4°F, 50RH%)	4800	psi	ASTM D790
Flow Temperature	293	°F	ASTM D569
Modulus of Elasticity x 105 (in Flexture, 73.4°F, 50RH%)	1.45	psi	ASTM D790
Rockwell Hardness - R Scale (73.4°F, 50RH%)	55	—	ASTM D785
Specific Gravity (73.4°F, 50RH%)	1.27	—	ASTM D792
Soluble Matter lost (73.4°F)	0.6	%	ASTM D570
Water Absortion (24Hr Immersion, 73.4°F) Total	2.3	%	ASTM D570
Tensile Strength at Fracture (73.4°F, 50RH%)	4700	psi	ASTM D638
Deformation under load (cold flow) method A (Dry) Load 2000 psi (122°F)	23	%	ASTM D621
Tensile Strength at Fracture (158°F, 50RH%)	1950	psi	ASTM 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%)	1.2	ft-lb/in	ASTM D256

Regulatory & Compliance

Certifications & Compliance

Directive 2011/65/EC amended through EU/2015/863 (RoHS)

Technical Details & Test Data

Typical Molding Conditions

Scented Cellulose Acetate
Barrel Temp Starting Profile.

Flow	M
Rear	340°- 360°F
Center	340°- 360°F
Front	340°- 360°F
Nozzle	360°- 380°F

Pressures

Flow	M
Moveable Half	1300 / 1100 PSIG
Back Pressure	0 – 50 PSI

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.