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PE Film CD Treated to 42 dynes - lost the CD T in less than week!?

PE Film CD Treated to 42 dynes - lost the CD T in less than week!?

PE Film CD Treated to 42 dynes - lost the CD T in less than week!?

(OP)
Dear Sirs,
 
Many times in the past we manufactured the same Flame Retardant film for our customer, CD treated in the range of 42 to 45 dynes. Film is used for lamination to paper cardboard. Customer never had problem to laminate our film in their process.
The last production run of the same product (under same condition and using same equipment and same basic resin, no slip additive) wasn't trouble free. We experienced problem with excessive water contents in flame retardant additives (Halogen compounds, blended with white masterbatch). Problem was so obvious - holes in the film, caused by evaporated stem of water, and we have to stop production. Technical Reps. from additive supplier has been consulted and supplier agree to immediately replace faulty (high water content Flame Retardant additive).
Upon receiving a new Flame Retardant production resumes. Film was as usual QC check for treatment level and it was found that film hold 42 dynes. Next morning QC reported (using the same sample) that treatment is only - weak 38 dynes and still diminishing to final 36 dynes later afternoon.
This is a small story of our big problem...
After an extensive examination, I have concluded that an excessive water content in  Flame Retardant additive (no so high as in first obvious example, but still present) is major cause for diminish CD treatment. My understanding is that molecules of water (polar), after migrating to PE surface, adversely affect (masking) the introduction of the polar group during the CD oxidation process, to PE surface.
 
I would greatly appreciate if you could comment my big problem.
 
Thanks & Regards,
 
Ray
 

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