TECHNICAL DATA SHEET|
Polyurethane Process and Recovery Concentrates
Xtracon PR series are concentrates for use in thermoplastic polyurethane
or polyurethane alloy applications where improved melt strength and
flow characteristics are required. The PR series are particularly useful
as processing aids with virgin resin in blown and cast film as well as
for profile extrusion applications.
The use of Xtracon PR has also been effective in re-polymerizing regrind and
or low molecular weight polyurethane thermoplastics where
significant improvements in both processing parameters and
physical properties have been shown. The degree of recovery will
vary with the amount used and mixing efficiency but levels of 1-10 pphr*
have been proven to be effective in a number of different systems.
* pphr is parts per 100 parts of resin
|The Series Consists of Five Grades with the Following Base Resins|
|Xtracon PR-100||Polyester Urethane|
|Xtracon PR-200||Polyether Urethane|
|Xtracon PR-300||Ether/Ester Urethane|
|Xtracon PR-400||Aliphatic Polyether Urethane|
|Xtracon PR-500||Rigid Urethane|
|Appearance||1/8” x 1/8” Pellets|
|Melt Flow Index, 195°C|
8.7 Kg. Load
10 Min., Gms.
|75 - 250|
|Water Content ( % )||0.03|
|Sp. Gr.||1.10 - 1.25|
XTRACON PR Series should be stored in a cool dry place and
care should be taken to re-seal containers carefully that
have been opened to avoid contamination by atmospheric moisture.
XTRACON PR Series are not considered to be hazardous under
SARA TITLE III. Safe industrial handling and hygiene practices
are always highly recommended. Polyurethanes and other plastics
produced with this product my present a fire hazard in certain
applications if exposed to fire and/or excessive heat,
e.g. welding and cutting torches in the presence of oxygen or air.
Refer to MSDS for more information.
XTRACON PR Series are packaged in 50, 100, 200, 500, and 1000 lb. net
fiber-packs or Gaylords. Smaller packages of 1, 5 and 10 lbs. are
available on request.
Processing for extrusion requires a minimum melt temperature of
340°F to fully initiate the beneficial effects of Xtracon PR product series.
Typical processing profile temperatures can range from 340°F to 450°F
and will depend on the optimum recommended temperatures of the base resin.
In general terms, it is recommended to start the extruder slightly hotter
than normal and then cool the die to a level lower than is normally used.
This may assist in bubble or tube control, however the Xtracon PR should
provide for a wide latitude of temperature variation and still maintain
bubble or profile integrity.
Note: With certain types of TPU, at temperatures >450°F, a slightly fishy
or very mild amine odor has been noticed by operators.
This phenomenon is does not occur in all TPU materials and is
undetectable in all of the finished urethane films or articles.
The material responsible for this odor has not been identified nor
has any potential health hazard been determined.
The facts stated and recommendations made herein are based
on our research and research of others, and are believed
to be accurate. No guarantee of their accuracy is made, however,
and the product discussed is recommended without warranty on our part,
express or implied, and upon conditions that recipients shall
make their own test to determine its suitability for their purposes.
Likewise, statements concerning the possible uses of the product
are not intended as recommendations to use it in the infringement
of any patent.