Полиуретаны представляют собой отдельный класс синтетических материалов. Это эластомеры с программируемыми качествами. В ближайшее время полиуретаны находят все более обширное применение в индустрии в качестве действенных заменителей резины. Из их изготавливают детали, работающие в брутальной среде, под воздействием больших знакопеременных нагрузок. Большинство полиуретанов имеет рабочую температуру в спектре от +80°С до -60°С. Допускается краткосрочное нагревание до 120°С.Полиуретаны практически не подвергаются старению и их свойства не изменяются в продолжение всего срока службы, у их низкая температура стеклования при высочайшей стойкости к воздействию среды. Они владеют высочайшей устойчивостью к абразивному износу, отлично противостоят воздействию большинства органических растворителей, устойчивы к озону и ультрафиолету, к морской воде. Связь полиуретан-металл по wholesale nfl jerseys прочности намного выше, чем связь резина-металл.Бесспорное достоинство полиуретанов заключается в том, что их твердость программируется и может быть изменена в довольно широких границах методом конфигурации соотношений компонент. Вероятным это становится из-за того, что полиуретаны отличаются не только лишь составом, да и количеством примененных компонент.Применение полиуретанов для производства деталей автомобиля началось около 20 годов назад. В главном это были сайлентблоки и втулки для шасси спорткаров и джипов, другими словами узлы, требующие эластичности и долговечности. Скопленный опыт позволил провести сопоставление эксплуатационных и технологических различий изделий из резины и тех же изделий, выполненных из полиуретана. Изделия из резины:натуральные составляющие, добавляемые для придания эластичности, уменьшают срок службы деталей-состав компонент неоднороден-основные характеристики начинают теряться сходу после производства, при хранении детали получают все огромную твердость, при эксплуатации растрескиваются снаружи и размягчаются снутри, упругость и упругость стремительно утрачиваются-резина активно разрушается под воздействием неблагоприятных погодных причин и критерий эксплуатации – низкие либо высочайшие температуры, уф-излучение и озон, воздействия горючего и масел. Изделия из полиуретана:синтетический полимер без натуральных добавок, имеющий проектируемые физико-механические свойства-состав компонент однороден-почти не меняются от времени, не изменяют собственных параметров в различных критериях эксплуатации-обладают высочайшей устойчивостью к воздействию разных растворителей и химикатов, их характеристики не достаточно меняются при изменении природных критерий.Данные, приобретенные компанией Engineered Plastic Solution, свидетельствуют о том, что применение полиуретанов наращивает очень допустимую нагрузку на изделие в 4 раза, а абразивный износ миниатюризируется в 10 раз в сопоставлении с резиной.Стоимость деталей из полиуретана выше цены подобных резиновых, но эта разница стремительно перекрывается за счет более длительного – в 3-5 раз – срока службы и существенно пореже возникающей необходимости подмены полимерных деталей. Финансовая выгода на стороне потребителя.

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