𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞 : 𝐅𝐢𝐥𝐥𝐞𝐫𝐬 𝐚𝐫𝐞 𝐧𝐨𝐭 𝐢𝐧𝐞𝐫𝐭. 𝐀𝐧𝐝 𝐢𝐧 𝐏𝐕𝐂, 𝐂𝐚𝐂𝐎₃ 𝐦𝐚𝐲 𝐛𝐞 𝐭𝐡𝐞 𝐛𝐢𝐠𝐠𝐞𝐬𝐭 𝐬𝐢𝐥𝐞𝐧𝐭 𝐯𝐚𝐫𝐢𝐚𝐛𝐥𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐫𝐨𝐨𝐦.

𝐓𝐨𝐝𝐚𝐲'𝐬 𝐊𝐍𝐎𝐖𝐋𝐄𝐃𝐆𝐄 𝐒𝐡𝐚𝐫𝐞

𝐅𝐢𝐥𝐥𝐞𝐫𝐬 𝐚𝐫𝐞 𝐧𝐨𝐭 𝐢𝐧𝐞𝐫𝐭.

𝐀𝐧𝐝 𝐢𝐧 𝐏𝐕𝐂, 𝐂𝐚𝐂𝐎₃ 𝐦𝐚𝐲 𝐛𝐞 𝐭𝐡𝐞 𝐛𝐢𝐠𝐠𝐞𝐬𝐭 𝐬𝐢𝐥𝐞𝐧𝐭 𝐯𝐚𝐫𝐢𝐚𝐛𝐥𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐫𝐨𝐨𝐦.

𝐈𝐭 𝐢𝐬 𝐨𝐟𝐭𝐞𝐧 𝐭𝐫𝐞𝐚𝐭𝐞𝐝 𝐥𝐢𝐤𝐞 𝐚 𝐜𝐨𝐬𝐭 𝐫𝐞𝐝𝐮𝐜𝐞𝐫.

𝐁𝐮𝐭 𝐜𝐚𝐥𝐜𝐢𝐮𝐦 𝐜𝐚𝐫𝐛𝐨𝐧𝐚𝐭𝐞 𝐝𝐨𝐞𝐬 𝐟𝐚𝐫 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐫𝐞𝐝𝐮𝐜𝐞 𝐟𝐨𝐫𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧 𝐜𝐨𝐬𝐭.


𝐈𝐭 𝐜𝐚𝐧 𝐜𝐡𝐚𝐧𝐠𝐞:


• 𝐛𝐮𝐥𝐤 𝐝𝐞𝐧𝐬𝐢𝐭𝐲

• 𝐩𝐨𝐰𝐝𝐞𝐫 𝐟𝐥𝐨𝐰

• 𝐟𝐮𝐬𝐢𝐨𝐧 𝐛𝐞𝐡𝐚𝐯𝐢𝐨𝐫

• 𝐦𝐞𝐥𝐭 𝐯𝐢𝐬𝐜𝐨𝐬𝐢𝐭𝐲

• 𝐬𝐮𝐫𝐟𝐚𝐜𝐞 𝐟𝐢𝐧𝐢𝐬𝐡

• 𝐠𝐥𝐨𝐬𝐬

• 𝐢𝐦𝐩𝐚𝐜𝐭 𝐬𝐭𝐫𝐞𝐧𝐠𝐭𝐡

• 𝐬𝐭𝐢𝐟𝐟𝐧𝐞𝐬𝐬

• 𝐬𝐡𝐫𝐢𝐧𝐤𝐚𝐠𝐞

• 𝐝𝐢𝐞 𝐛𝐮𝐢𝐥𝐝-𝐮𝐩

• 𝐩𝐥𝐚𝐭𝐞-𝐨𝐮𝐭 𝐭𝐞𝐧𝐝𝐞𝐧𝐜𝐲

• 𝐬𝐜𝐫𝐞𝐰 𝐚𝐧𝐝 𝐛𝐚𝐫𝐫𝐞𝐥 𝐰𝐞𝐚𝐫

• 𝐛𝐚𝐭𝐜𝐡-𝐭𝐨-𝐛𝐚𝐭𝐜𝐡 𝐜𝐨𝐧𝐬𝐢𝐬𝐭𝐞𝐧𝐜𝐲


Two PVC compounds can use the same resin, same stabilizer, same lubricant system, and same phr of CaCO₃.

But if the CaCO₃ changes, the compound may not behave the same.

Why?

𝐁𝐞𝐜𝐚𝐮𝐬𝐞 𝐂𝐚𝐂𝐎₃ 𝐢𝐬 𝐧𝐨𝐭 𝐣𝐮𝐬𝐭 “𝐟𝐢𝐥𝐥𝐞𝐫.”

𝐈𝐭𝐬 𝐛𝐞𝐡𝐚𝐯𝐢𝐨𝐫 𝐝𝐞𝐩𝐞𝐧𝐝𝐬 𝐨𝐧:


• 𝐩𝐚𝐫𝐭𝐢𝐜𝐥𝐞 𝐬𝐢𝐳𝐞 𝐝𝐢𝐬𝐭𝐫𝐢𝐛𝐮𝐭𝐢𝐨𝐧

• 𝐜𝐨𝐚𝐭𝐢𝐧𝐠 𝐭𝐲𝐩𝐞 𝐚𝐧𝐝 𝐜𝐨𝐚𝐭𝐢𝐧𝐠 𝐥𝐞𝐯𝐞𝐥

• 𝐦𝐨𝐢𝐬𝐭𝐮𝐫𝐞 𝐜𝐨𝐧𝐭𝐞𝐧𝐭

• 𝐰𝐡𝐢𝐭𝐞𝐧𝐞𝐬𝐬

• 𝐨𝐢𝐥 𝐚𝐛𝐬𝐨𝐫𝐩𝐭𝐢𝐨𝐧

• 𝐬𝐮𝐫𝐟𝐚𝐜𝐞 𝐚𝐫𝐞𝐚

• 𝐝𝐢𝐬𝐩𝐞𝐫𝐬𝐢𝐨𝐧 𝐪𝐮𝐚𝐥𝐢𝐭𝐲

• 𝐢𝐦𝐩𝐮𝐫𝐢𝐭𝐲 𝐩𝐫𝐨𝐟𝐢𝐥𝐞

• 𝐥𝐨𝐭-𝐭𝐨-𝐥𝐨𝐭 𝐜𝐨𝐧𝐬𝐢𝐬𝐭𝐞𝐧𝐜𝐲


A finer grade may improve surface finish, but increase lubricant demand.

A poorly coated grade may hurt dispersion or increase moisture sensitivity.


Higher loading may improve stiffness and reduce cost, but reduce impact strength if dispersion and formulation balance are not controlled.


𝐀 𝐬𝐦𝐚𝐥𝐥 𝐜𝐡𝐚𝐧𝐠𝐞 𝐢𝐧 𝐂𝐚𝐂𝐎₃ 𝐜𝐚𝐧 𝐬𝐡𝐨𝐰 𝐮𝐩 𝐥𝐚𝐭𝐞𝐫 𝐚𝐬:


𝐓𝐨𝐫𝐪𝐮𝐞 𝐬𝐡𝐢𝐟𝐭.

𝐅𝐮𝐬𝐢𝐨𝐧 𝐜𝐡𝐚𝐧𝐠𝐞.

𝐃𝐮𝐥𝐥 𝐬𝐮𝐫𝐟𝐚𝐜𝐞.

𝐏𝐨𝐨𝐫 𝐢𝐦𝐩𝐚𝐜𝐭.

𝐌𝐨𝐫𝐞 𝐝𝐢𝐞 𝐛𝐮𝐢𝐥𝐝-𝐮𝐩.

𝐃𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭 𝐛𝐮𝐥𝐤 𝐝𝐞𝐧𝐬𝐢𝐭𝐲.

𝐔𝐧𝐬𝐭𝐚𝐛𝐥𝐞 𝐟𝐞𝐞𝐝𝐢𝐧𝐠.


That is why blaming the resin is easy.

But sometimes the real story is hiding in the filler.


The question is not:

“How much CaCO₃ did we add?”

The better question is:

“𝐖𝐡𝐢𝐜𝐡 𝐂𝐚𝐂𝐎₃ 𝐝𝐢𝐝 𝐰𝐞 𝐚𝐝𝐝, 𝐚𝐧𝐝 𝐡𝐨𝐰 𝐝𝐢𝐝 𝐢𝐭 𝐛𝐞𝐡𝐚𝐯𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐬𝐲𝐬𝐭𝐞𝐦?”

𝐁𝐞𝐜𝐚𝐮𝐬𝐞 𝐢𝐧 𝐏𝐕𝐂, 𝐟𝐢𝐥𝐥𝐞𝐫𝐬 𝐚𝐫𝐞 𝐧𝐨𝐭 𝐩𝐚𝐬𝐬𝐞𝐧𝐠𝐞𝐫𝐬.

𝐓𝐡𝐞𝐲 𝐜𝐡𝐚𝐧𝐠𝐞 𝐭𝐡𝐞 𝐫𝐢𝐝𝐞.


source : Orbimind AB


#PVC #PVCCompounding #CalciumCarbonate #Fillers #Extrusion #ProcessControl #PlasticsProcessing #OrbimindAB

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