Articles
Resin Prices Up, But Not for Long
A turnaround is foreseen for PE, PP, PS, PVC, and PET, based on supply-demand balance and/or feedstock costs.
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What You Can Learn From Pharma Compounders
Twin-screw extrusion has been a standard in plastics compounding for decades but has only recently been embraced by the pharmaceutical industry. Here’s what plastics compounders might learn from the ‘newbies’ to help make a better, more consistent product.
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How Sprue Pullers Help Prevent Molding Issues: Part 2
A vital secondary function of sprue pullers is to act as a cold well to trap solidified material left in the machine-nozzle tip.
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Extrusion: How Hopper Crammers Can Help Feeding
A crammer can assist the flow of certain polymers into the extruder. But the design is not universal and very material dependent. Here’s what you need to know.
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Injection Molding: New Mold Trial—Will It Run 24/7?
Use this nine-step process to make sure you’ll be making good parts after a successful trial. But even then, be prepared for some hiccups.
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Materials: Cycle Time—Science vs. Rules of Thumb, Part 6
This installment—on elastomers—completes a series, whose theme is to bring more science to the discipline of molding. The overall message: Ask a lot of questions whenever someone posits this or that ‘rule of thumb’ about processing.
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With the Exception of PP, Commodity Resin Prices Flat-to-Down
Going into December, resin prices are likely to be relatively stable with PP prices bumping up a bit.
Read More2017: A Mixed Bag for Recycled Plastics Pricing So Far
Volatility in HDPE and PP recycle prices; relative stability for R-PET.
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Platy Mineral Filler Does a Better Job In HFFR Cable Sheathing
Greater flame and smoke suppression, lower heat release, and a more stable char—all at an economical price.
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New ASTM Standard on Thickness Measuring to Boost Film Quality
Non-contact measurement standard should also expedite the testing process.
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Post-Consumer PET Bottles Turned to New ‘True’ Black Jeans
Unifil’s Repreve recycled fiber used by Cone Denim in a new line of black jeans.
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News in Hot Runners & Tooling At Fakuma 2017 Show
Highlights included some unusual solutions to common problems, slim nozzles for close spacing, and controls with lots of zones, as well as a handful of new cost- and space-saving standard mold components
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