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Join Date: Aug 2007
Location: Belgium, Europe
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PVC Calendering

03/05/2015 1:28 AM

Our formulation contains ESO and DINP. I substituted all of the ESO content for extra DINP (ca 1:1). The line speed dropped. Why ?
All positive feedback is appreciated.

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#1

Re: PVC Calendering

03/05/2015 6:22 AM

IIf you put all the ESO back again, does the line speed up again? If so, don't mess about with it again. If it doesn't, then the reduction in speed has nothing to do with the ESO.

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#2

Re: PVC Calendering

03/05/2015 8:46 AM

You have changed the formulation. Why would you, except to make a cheaper product to increase your profits?

You have changed the physical properties of the melt and the end product.

Why would you do this, if not for profit?

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#3
In reply to #2

Re: PVC Calendering

03/05/2015 4:42 PM

You probably affected the compound stability as ESO has co-stabilizing effects so you probably degraded the polymer more. And I agree that you changed the viscosity and rheology of the melt.

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#4

Re: PVC Calendering

03/06/2015 12:45 AM

I Would have expected you to go the other way due to the carcinogenic risk associated with DINP.

Is it possible that the Soy Bean compound has better lubricating properties or lighter molecular structure and therefore exhibits less drag on the machinery?

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#5
In reply to #4

Re: PVC Calendering

03/06/2015 9:49 AM

For some strange reason DINP has a higher allowed value of oral intake than does ESBO (ESO). I suspect both act as endocrine mimics, just IMHO. Apparently food container (glass jars with metal lid) has a PVC seal (apparently the soft kind), that contains both compounds, and this leaches into food, so isn't that appealing?

On the other hand, moldy pickles are not all that appealing either, nor is moldy sour kraut.

From what I could gather by googling this stuff (that I really know next to nothing about), it appears the ESO is the winner as it scavenges hydrochloric acid from PVC thermal decomposition. Precisely how it scavenges? Possibly through nucleophilic substitution reaction at the epoxidic sites of the soybean oil that displaces the epoxide oxygen, and replaces it with chloride, making the oil that was once a natural oil into a chlorinated organic compound. Want some of that with those fries?

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