PT Blog

Braulio Polanco will be among the roughly 70 speakers presenting at Plastics Technology’s Extrusion 2018 Conference, to be held Sept. 18-20 at the Huntington Convention Center in Cleveland. On Thursday morning, in the General Extrusion Session, Polanco will present Design of Experiments for Scientific Extrusion.

“Scientific Extrusion?” you ask. “I’ve heard a lot about Scientific Molding, but what’s Scientific Extrusion?’

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By mid-June, prices of six volume resins—PE, PS, PVC, ABS, PC, and nylon 6, appeared to be on a flat-to-down trajectory, owing to lower prices of some key feedstocks coupled with improved supply-demand balance circumstances. In contrast, tight supplies of other feedstocks and their intermediaries along with higher prices have resulted in an upwards pricing trajectory for PP, PET, and nylon 66. This according to purchasing consultants Resin Technology Inc. (RTi), PetroChemWire (PCW), and Michael Greenberg, CEO of the Plastics Exchange. Here’s a glimpse at each.

● PE: Prices last month were a mixed bag for the first time in quite a few years. Two suppliers reportedly offered a decrease of 3¢/lb for LLDPE, with prices of all other resins flat. Making things more complicated, Dow announced a 4¢/lb increase for June, while other suppliers postponed their 3¢/lb price hikes (which originated for March implementation) into this month. Mike Burns, RTi’s v.p. of client services for PE, for one, ventured June prices would be flat, with a good chance that trend could continue into this month and beyond. A false demand surge as a result of hurricane season inventory buildup by buyers could promote higher prices.

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At NPE, Jomar molded polycarbonate LED bulbs on its new IntelliDrive 85S servohydraulic injection-blow machine. Molded eight-up in 11.5 sec, the bulbs had only slightly visible gate marks and parting lines—something not supposed to be possible with this process, according to Jomar sales manager Ron Gabriele. He credits both the know-how of Jomar’s processing team and the skills of the toolmaker, Lenape Mold in Millville, N.J.

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There was no doubt in my mind that at NPE2018 there would be a swirl of conversations on resin availability and resin pricing, in addition to new resins and compounds that better meet requirements in various key markets—from packaging, consumer electronics and automotive to bioplastics and high-performance 3D filaments.

So, it was no surprise to hear from a major, fast-growing distributor of a broad range of resins—Independence, Mo.-based PolySource—wanting to share the talking points they had prepared to discuss with NPE visitors, and beyond, concerned about potential nylon 66 shortages and escalating prices.

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Sponsored Content 15. June 2018

Purer ABS Resin Equals Better Parts

Color, texture and overall surface quality are crucial with any plastic part. Ensuring aesthetic quality, ABS resin made with mass polymerization uses fewer VOCs and impurities, and the proof is noticeable. Impurities such as VOCs, gels and other residual chemicals can have a noticeable impact on the quality of ABS resins, and ultimately the color of the product.

Traditionally, ABS resin has been made with a multi-step batch reaction process called emulsion polymerization, which requires the use of several processing additives such as emulsifiers and salts. The impurities from the additives can remain in the finished material in detectable levels, contributing to the resin’s yellowish tint.

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