SPE Thermoforming Quarterly®

Second Quarter 2017

Volumetric Absorption Concept – Part 1, Model Building
by Jim Throne, Dunedin, FL

I lay the groundwork for a thorough comparison of radiopaque and volumetric absorbing heat transfer models. I define the technical models for thin-gauge thermoplastic sheet through what I have called the Lumped Parameter Model (LPM) where conduction through the plastic plays no role. And I define the radiopaque and volumetric absorbing models for thick-gauge thermoplastic sheet. I call these models the Distributed Parameter Models (DPM) where conduction plays an important role in energy transfer from sheet surface to core. This is preparatory to my solving the arithmetic for these models. In Part 2, I present solutions to the LPMs. In Part 3, I present solutions to the DPMs…

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Second Quarter 2017

2017 North American Plastics Industry Study (NAPIS)
by Plante Moran, Cleveland, OH

Workforce productivity has risen to yet another 10-year high and continues to be a key driver of positive margins for processors. As a whole (not just the top performers), the plastics processors industry became more commercially disciplined, meaning that most processors stopped pursuing low margin work and/or shed unprofitable business.

Disciplined approaches to growth led to moderate but less significant increases in year-over-year sales for the average processor. Higher machine utilization and strong balance sheets suggest that many processors are being cautious with new capital spending and continue to work with existing machines…

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