Compounding

Resin Conveying

Check Out the New PTonline.com

Following the relaunch of our print publication and electronic newsletters, our website has a new, vibrant look now, too.

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Celanese Acquires Conductive Plastics Compounder

The acquisition of Cool Polymers includes its thermally and electrically conductive compounds, as well as electrically insulative compounds, based on a variety of engineering plastics and elastomers.

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The Paradox of Proportioning

Continuous proportioning typically involves a group of gravimetric feeders operating under some form of higher level coordinating control. One would think the result should be a perfectly formulated composite stream. But the devil is in the details.

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Barrel Repair: When Does It Make Sense?

Repairing a barrel can save you time and money vs. buying a brand-new one. But it’s not an easy fix and not even always possible.

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What Processors Are Doing To Bridge the Skills Gap

Seasoned technicians are leaving, and replacing them with youngsters is a challenge. But some processors have taken dramatic initiatives to change how young people think about manufacturing and are bringing the next generation into the fold.

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processing tips

Solving Common Problems in Underwater Pelletizing

Pellet quality and consistency are critical to any compounding operation. But in underwater pelletizing, a variety of issues can stand in the way. Here’s how to fix them.

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Biopolymers

Compounding PLA on Twin-Screws: What Testing Reveals

Twin-screw extrusion is the preferred method for compounding PLA and other biopolymers. But processing PLA is complicated because it’s sensitive to heat and shear. It’s also prone to hydrolytic degradation if moisture is present in molten PLA. Here’s what one machine builder’s trials revealed.

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Testing

Color Pioneer Charvat Dies

Long-time SPE member, teacher and consultant.

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Automotive

Industry Expands Again

January was the third month in a row and the fifth time in six months that index was higher than it was one year ago.

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Compounding

Did I Say Mexico Was Hot?

On Jan. 2, I wrote that Mexico was benefiting from the trend of 鈥渞eshoring鈥 manufacturing jobs from Asia to North America. New evidence of that trend came in today from PolyOne Corp.

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