OGL Oil and Gas Extraction 101

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N E W SS T O R I E SUrethane vs Plastic: Materialof StrengthAs finite resources become more expensive, manufacturers are looking for waysto improve their products with reusable materials. This begs the question aboutwhether manufacturers should look to urethane or plastic for their products. Plasticsare made of carbon and hydrogen molecules, while urethane is a bit more complex.Urethanes are often referred to as plastics, but they are not.How Plastics and Urethanes DifferStated by a urethane manufacturer, plastics include commonly used materials likepolyethylene, nylon, and PVC. Meanwhile, urethanes use a flexible polymer molecule thatmakes the material an elastomer. This is why plastics must be injection molded, and urethanecan be cast molded or reaction injection molded. Because of their chemical makeup, plasticswill break when pushed beyond their limitations. But, urethanes usually return to their cast orinjected forms.60
Durability and FlexibilityUrethane is a more durable and flexible product than any plastic. While plastics do last a longtime, products made of plastic will wear out before a urethane product does. They are alsomore likely to break, abrade, or deteriorate before urethanes will.One of the most unique aspects of urethane is the material’s elastomeric ability. This meansthat urethanes can be stretched or extended significantly. And when released, they will returnto their present size. Plastics cannot do this. In fact, if you attempt to stretch or extend a plasticpiece, it will remain stretched, or it will break.Abrasion ResistanceAnother impressive quality of urethane is the material’s resistance to abrasion. Urethane wheelsand rollers will last significantly longer than the same parts made of plastic. Manufacturerswho use urethane parts in their machines are satisfied with the lifespan of the urethane partsbecause they do not break down when friction breaks down other materials.Cost SimilaritiesMaking parts from plastic or urethane have relatively similar costs. But, what cost less is makingthe casts for urethane products. Most of the casts are made out of silicon, which is inexpensive.However, plastic injection molding is not expensive, but the parts made this way do not last aslong as urethane ones do. So, in the long run, urethane parts are more cost-effective simplybecause they have a longer lifespan than their plastic counterparts.Load BearingUrethanes have incredible load-bearing performances. Plastics tend to break when they arepushed to their limits, but urethanes often surprise engineers with home much they can tolerate.Their elastomer quality gives them better shock absorption when impacts reach higher levels.Temperature and FrictionWhen urethane is put under the stress of heat and friction, it continues to perform. Of course,like all products, there are temperature limits. One of those is the low-temperature threshold,and urethanes will continue to respond in temperatures that reach -60°F and more.Sound and NoiseUrethanes are frequently used to dampen noise. For example, polyurethane foam is ofteninjected into car doors to reduce road noise. While plastic isn’t necessarily a noisy material,urethanes are generally quiet because they absorb noise. Plastic can be noisy, especiallycrinkly bags and rigid toys made from the material.61
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