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PVC Extrusion w/ EVA Color

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6 years 8 months ago #334 by Archived Forum Admin
Our problem seems to have gone away. Why were not sure. We were thinking that maybe the color meter jamed up and sent straight concentrate through to the extruder head, which may not be as plyable as the actuall PVC compound.

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6 years 8 months ago #328 by Archived Forum Admin
Hello there brygervais,

Teknor Apex offers two flexible PVC compound, 80851-B and 80851 but 80851 is specifically referred to as insulation. I imagine that this is exactly what you are using.

Some questions for thought:

1) Did the technical folks at the Vinyl Division of Teknor Apex agree with your selection of color masterbatch?

2) Does your plant have a "Munsell Color Standards" book? See web page www.munsellstore.com/default.aspx/MenuIt...6/MenuGroup/Home.htm and then select "Electrical Power Industry" Your item number is M50110. It costs $427.00. Buy two. One for the library and one for the process guys on the floor.

3) Do you use gravimetric mixers to minimize the amount of masterbatch used? (Lean manufacturing.)

4) Have you ever done any experiments to ensure you are using the minimum amount of masterbatch? (Lean manufacturing.)

5) Have you discussed your insulation splitting issue with the technical people at Teknor Apex?

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212

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6 years 8 months ago #329 by Archived Forum Admin
You should ask VA content to masterbatch supplier.

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6 years 8 months ago #330 by Archived Forum Admin
We are looking into the points you brought up Peter thank-you. I'll let everyone know what we found

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6 years 8 months ago #331 by Archived Forum Admin
Hello brygervais , on a recent visit to one cable supplier in Mexico we observed the same situation that you're describing above also one of the failures mode was when we hits the cable against the floor they crack it along the cable, and the root cause for this specifically was plasticizers % on the compound was not according to the specification, we tried doing a design of experiments to get this conclusion, I hope this helps, regards

Angel

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6 years 8 months ago #332 by Archived Forum Admin
Is this a standard test? I know this is extruded wire and not Magnet wire which has some tough tests but none that would require bending the wire back on itself 180 degrees. Additionally after the physical abuse, the magnet wire must still pass electrical properties.

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