𝗧𝗼𝗱𝗮𝘆'𝘀 𝗞𝗡𝗢𝗪𝗟𝗘𝗗𝗚𝗘 𝗦𝗵𝗮𝗿𝗲 : 𝗦𝗮𝗺𝗲 𝗶𝗻𝗴𝗿𝗲𝗱𝗶𝗲𝗻𝘁𝘀. 𝗦𝗮𝗺𝗲 𝗿𝗲𝗰𝗶𝗽𝗲. 𝗗𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 𝗼𝘂𝘁𝗽𝘂𝘁.

𝗧𝗼𝗱𝗮𝘆'𝘀 𝗞𝗡𝗢𝗪𝗟𝗘𝗗𝗚𝗘 𝗦𝗵𝗮𝗿𝗲

𝗦𝗮𝗺𝗲 𝗶𝗻𝗴𝗿𝗲𝗱𝗶𝗲𝗻𝘁𝘀.

𝗦𝗮𝗺𝗲 𝗿𝗲𝗰𝗶𝗽𝗲.

𝗗𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 𝗼𝘂𝘁𝗽𝘂𝘁.

Here’s one hidden variable many people miss:

Energy input.

In PVC compounding, the batch sheet tells you what went in.

But it does not tell you how much mechanical and thermal work the powder received.

Two batches can have the same formulation and still behave differently if the mixing energy history is different.

Because energy input can affect:

• additive distribution

• lubricant melting and coating

• plasticizer absorption

• filler dispersion

• bulk density development

• powder temperature history

• fusion behavior downstream

That is why “same drop temperature” does not always mean “same batch.”

One mixer may reach it faster.

One blade may be worn.

One load may be slightly different.

One cooling step may remove heat differently.

Same recipe.

Different energy history.

Different behavior in the extruder.

The real question is not only:

“Did we add the right ingredients?”

It is:

“Did we give the powder the same mechanical and thermal work?”

Because in PVC, consistency is not just formulation control.

It is process-energy control.

source : Orbimind AB

#PVC #PVCCompounding #ProcessControl #Extrusion

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