small resulting in precise flow rate measurements. Long flags for slowly
flowing material can make for extraordinarily long tests and the material may
actually degrade substantially during the test.
Dynisco Polymer Test provides 1/8" and 1/2" Non-ASTM flags in addition to
the standard 1/4" and 1" flags to provide more flexibility in the time needed to
traverse the flag (B time). Use the following table to aid your selection of the
proper flag.
Flag Selection Table
MFR
MFR
Flag
Flag travel
Min
Max
Length
Time Range
g/10m
g/10m
cm
minutes
0.15
1.0
.635
29 - 4.
0.15
1.0
.3175
14 - 2
1.0
3.5
.635
4.3 - 1.2
1.0
3.5
1.27
8.7 - 2.5
3.5
10
0.635
1.2 - 0.4
3.5
10
1.27
2.5 - 0.9
10
25
1.27
0.9 - 0.4
10
25
2.54
1.8 - 0.8
25
50
2.54
0.8 - 0.4
50
300
2.54
0.4 - 0.06
From the first two lines 0.15 to - 1 g/10 min. expected MFR we can see we have
the option of running with a 0.635 cm (1/4") Flag or a 0.3175 cm (1/8") flag. If
the flow rate is close to 0.15 the overall test time would be around 29 minutes! If
we use the 1/4" flag instead of the 1/8" flag. The experimental run time would be
halved.
The Actual Run
How to do it: Step by Step
Instrument Prep
Loading the Barrel
The standard Dynisco Polymer Test In-house test procedure section in this
manual is an abbreviated version of what follows). Press
EDIT
and verify
all entered program data values are correct. Make sure all equipment has
been properly cleaned. Insert piston rod and let the system come to
temperature and wait for temperature lock-in. Lock-in has occurred when
the display reads “READY”. Heat up and lock-in must occur with orifice
and piston rod in the heat chamber.
During heat up the program may be adjusted and the
Operator.
and
Sample ID
can be entered by pressing the
ID
key.
Remove the piston rod and lay on a cotton cloth. Check to see if the die is at
the bottom of the barrel. Fill heat chamber with an appropriate charge or use
about 5 grams if nothing is known about the material). Put the sample into the
10 ml beaker. Add about two-thirds of the material into the barrel, using the
brown fill funnel. The loading should be done in two increments, the first
consisting of approximately 60% of the material. Tamp down the material with
Series 4000 Melt Indexer Operation Manual
Method "B" Run
35
