Dow announced the winners of the 2019 Awards for Packaging Innovation. The nine Diamond Award Finalists

Dow announced the winners of the 2019 Awards for Packaging Innovation. The nine Diamond Award Finalists are varied and cover very different verticals, but a simultaneously practical and altruistic attitude toward sustainability is a common thread that unites them. The ultimate Diamond Award winner among the fine group of Diamond Award Finalists was the Functional Film Complex PET Bottle from Japan’s Dai Nippon Printing Co. (DNP). The product managed to tick virtually every box among judges’ criteria, and it represents a thoughtful use of packaging as problem solving medium—something all packagers and packaging solution providers aspire to. The issue Both in Japan and in North America, glass bottles are the incumbent standard containers for high-end beer, wine, and spirits (among other beverage options), both for their barrier properties and the sense of quality imparted by glass’s hand-feel and weight. But the weight, rigidity, and sturdiness that provides a sense of luxury is also a drawback in terms of sustainability in transport, and glass’s brittle nature means breakage is always an issue throughout the supply chain. The case for PET is not without its drawbacks, either. In ...

Solving the Bane of Stretch-Blow Molding: Off-Center Gates : Plastics Technology

There are many reasons why off-center gates happen, and processors should be aware of all of them to quickly find the ones causing the problem. Bottle with an off-center gate. The lower of the red circles shows the center of the bottom insert of the mold. The higher one shows where the gate ended up after blowing. Preform mandrel with three segments. The segments hold the preforms concentric as they travel through the ovens. Typical setup on a continuous-motion linear machine with passive rotation. The belt can be adjusted to push against the gears, but should not push hard enough to cause side-stress against the bearing. When the preform is stretched into the blow mold, the vestige of the injection molding process, mostly referred to as a gate, must be placed and held in the center of the bottom insert of the mold. If this does not happen, the side to which the gate is pushed becomes thicker, and, consequently, the other side will be thinner. This is simply the effect of shorter and longer paths of the preform wall to reach the blow mold wall. With bottles becoming lighter and thinner as a result of cost-cutting measures as well as environmental concerns (“carbon footprint”), ...