The Basic Principles Of pvc
The Basic Principles Of pvc
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UV-ljus och temperatur anses vara de faktorer som svarar för den huvudsakliga nedbrytningen vid utomhusåldring av plast. I likhet med andra plaster bryts PVC ned av solljus. Den fotokemiska nedbrytningen accelereras vid höjd temperatur.
PVC output will involve a procedure often known as polymerization, whereby monomers of vinyl chloride are chemically bonded to kind a polymer chain. The two primary sorts of polymerization utilised are suspension polymerization and emulsion polymerization.
Vid temperaturer upp till 60°C är styv PVC resistent mot de flesta oorganiska vätskor inklusive moderat koncentrerade syror samt alkali och icke-oxiderande saltlösningar i alla koncentrationer.
این صفحه آخرین‌بار در ۲۳ ژانویهٔ ۲۰۲۵ ساعت ۱۵:۳۹ ویرایش شده است.
موارد استفادهٔ فراوانی برای پی‌وی‌سی شامل: وینیل سایدینگ، علامت مغناطیسی کارت‌ها، برش عمودی پنجره‌ها، صفحات گرامافون، لوله، لوله‌کشی، کانال و لوازم نصب‌کردنی، کیف‌های ارزان‌قیمت، پنجره‌های تاریک (بدون دید) و در شکل نرم آن برای لباس، اثاثیه یا لوازم داخلی نظیر پرده، کف‌سازی و ساختن سقف، پوستهٔ کابل‌های الکتریکی، توپ‌های بازی سبک‌وزن وجود دارد.
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PVC is primarily generated like a rigid or unplasticized polymer (RPVC) or as a versatile plastic (uPVC). Versatile, plasticized or regular PVC is softer plus much more amenable to bending than uPVC as a result of addition of plasticizers like phthalates such as diisononyl phthalate or DINP.
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Given that this product features a easy floor and absorbs and retains paint well it makes it ideal for a range of purposes. Expanded PVC may be painted with any plastic-pleasant paint which incorporates most spray paints. Thermal Conductivity
Pure polyvinyl chloride is really a white, brittle solid generally delivered as powder or pellets. It is actually insoluble in Alcoholic beverages but a little bit soluble in tetrahydrofuran.
One of the initially stuff you will discover about the maritime PVC board that We've got in stock here at Boat Outfitters is The reality that it really is extremely light-weight.
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Packaging: PVC’s flexibility and resistance to oil and grease ensure it is an outstanding choice for meals packaging.
Premature ventricular contractions (PVCs) are more heartbeats pvc شبابيك that start off in among the list of coronary heart's two decrease pumping chambers (ventricles). These further beats disrupt the typical heart rhythm, sometimes causing a feeling of the fluttering or possibly a skipped defeat inside the chest.