| PDM ELASTOMERS SACHET MIXING PDM/W/5210 ISSUE 6 |
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INTRODUCTION
PDM twin pack polyurethanes are two
part ambient temperature curing systems. Store at 18-25degC.
They are all supplied in the form of a twin pack sachet. This format has
been chosen:
1. To ensure an accurate mix ratio, even when the material is mixed on trials
etc.
2. To remove the need for evacuation of the mix (except in the most stringent
applications).
3. To keep the component materials uncontaminated (e.g. to avoid moisture
absorption).
4. To reduce the risk of operator contamination.
Do not remove sachet from foil envelope until you are ready to use the
elastomer.
Each sachet should be mixed and used in total, do not attempt to divide a
sachet.
Read and observe the recommendations of the Safety Data Sheet supplied.
a. Wear the recommended protective equipment-particularly gloves & safety
glasses with side protection.
b. Carry out the work in an extracted or well ventilated environment.
c. Do not excessively heat or spray the elastomer. Do not stand over the
elastomer for long periods.
d. Wash after use. Do not allow any contamination of foodstuffs.
In an emergency contact PDM - Telephone: +44 (0)1420 85848.
PDM Terms and Conditions apply.
MIXING
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Remove the sachet from
the foil bag, and thoroughly premix the individual components within the
separate sachet compartments. Any filler or sediment must be fully incorporated.
Remove the end caps. |
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Remove the plastic separator by
pulling the two halves of the sachet away from each other. Using the smooth
side of the separator as a scraper move one component into the other then
combine and mix the materials thoroughly within the sachet. Duration: 30 seconds. |
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Scraping carefully with the separator,
ensure material from the corners of the sachet is displaced into the central
area and incorporated. Finally move all the material to one end of the sachet
then fold over the empty part of the sachet. Duration: 15 seconds. |
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Continue to mix the materials thoroughly
within the sachet by kneading vigorously between the palms of the hands.
For EMC85T & derivatives...Duration: 60 seconds. For all other elastomers......Duration: 30 seconds |
| REPEAT Operation 3. REPEAT Operation 4. |
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Cut off a small corner of the pack
to dispense the elastomer. Judge the size of the cut for the flow rate you
need. Duration: 10 seconds. |
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Dispense the material from the pack
pouring it in a slow controlled and continuous manner. Try to avoid trapping
air in the moulding as the elastomer flows in. Do not scrape or squeeze out
the last residues from the sachet. Duration: 2 minutes maximum. |
| PDM Neptec |
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4-6 Alton Business Centre Omega Park Alton Hampshire
GU34 2YU England Telephone: +44 (0)1420 85848 Facsimile: +44 (0)1420 84288 E-mail: sales@pdmneptec.com Web Site: http://www.pdmneptec.com |