Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Plastics & Elastomers Functions
- Technologies
Applications & Uses
- Markets
- Processing Notes
Mowiflex C 30 compounds were designed for the application in food casings. It should be processed between 190 and 200°C. The material absorbs moisture once the packaging is opened and should therefore be processed only from unopened original containers. Otherwise bubbles may occur in the product. Damp material can be dried at 60°C – 80°C for 6 – 8 hours in a circulating-air dryer. Dry content can be determined shortly before extrusion, e.g. using a Sartorius Moisture Analyzer MA 100. Melt temperature during extrusion should not exceed 220°C because at higher temperatures the material suffers thermal damage, recognizable by yellow discoloration and an increase in melt pressure and torque. Residence time should be held as short as possible, 5 – 10 minutes at most.
Cleaning the extruder
Following extrusion of polyvinyl alcohol, the extruder must be cleaned with a polyolefin of similar melt viscosity. It is advisable to dismantle and clean the extruder at the same time. Alternatively, the extruder can be purged with polyolefin for a sufficient period of time. Depending on the design of the extruder, however, this can leave polyvinyl alcohol residues in the barrel and/or die, which can then crosslink or degrade under the influence of heat.
Properties
- Soluble in
- Cold Water
- Typical Properties
Value | Units | Test Method / Conditions | |
Melting Area | 180 - 210 | - | — |
Bulk Density | 0.6 - 0.9 | g/cm3 | — |
Glass Transition Temperature | 35 | °C | — |
Melt Flow Index - MFI (190°C/21.6 kg) | 20 - 40 | g/10 min | — |
Methanol Content | max. 1 | wt % | — |
Volatiles Content | 1 (0.2) | wt % | — |
Technical Details & Test Data
- Viscosity Curve
Storage & Handling
- Safety and Handling
Mowiflex is not a dangerous substance or preparation as defined by German chemical law or dangerous goods regulations or EC Directives 67/548/EC and 1999/45/EC in their current versions.
Mowiflex C 30 remains stable for at least 12 months in its original container provided if it is stored correctly, i.e. indoors in a dry environment and at room temperature.