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10 Steps to Plastic Bags

Plastic bags, also called ‘poly bags,’ are one of those modern conveniences we take for granted. But 60 years ago, no one ever considered the question, ‘Paper or plastic?’ Back then, people also managed to get by without Ziploc® bags or dry cleaner bags. This was because the technology for creating polyethylene film didn’t emerge until the 1940s during World War II. And the methods to create plastic bags from polyethylene film weren’t developed until the 1950s. The most common way to produce poly bags is by blown film extrusion, also called the ‘tubular film process.’ In a moment, you’ll see how it got this name. Plastic bags are made from polyethylene. During processing, the polyethylene might be treated with any number of additives, such as…

Lubrication: The Greener The Better

Manufacturing practices are becoming increasingly more scrutinized for their effect on the environment. Real changes are underway in the area of emissions, byproducts, packaging materials, fluid selection, and power consumption – to name only a few. While environmental payback may be the goal, many of these initiatives encounter obstacles, not the least of which is additional operational costs. Not so with lubrication – the greener the better. Utilizing very small amounts of lubricant at controlled intervals is productive for a number of reasons…

Investment Casting Soars Despite Misconceptions

Although one of the world’s oldest metal fabricating technologies, investment casting (sometimes known as ‘lost wax’ casting) has in recent years been subjected to a few misconceptions, ironically these fallacies have probably caused many who could have benefited most from this process to rule it out…

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