Polyvinyl chloride (alternatively: poly(vinyl chloride), [6] [7] colloquial: vinyl [8] or polyvinyl; abbreviated: PVC [8]) is the world's third-most widely produced synthetic polymer of plastic (after polyethylene and polypropylene). About 40 million tons of PVC are produced each year. [9] PVC comes in rigid (sometimes abbreviated as RPVC) and ...

2022年4月30日 · PVCs are irregular contractions that start in the ventricles instead of the atria. The contractions usually beat sooner than the next expected heartbeat. The cause of premature ventricular contractions isn't always clear. Certain things including heart diseases or changes in the body can make cells in the lower heart chambers electrically unstable.

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2019年8月21日 · Some of PVC plastic’s most important characteristics include its relatively low price, its resistance to environmental degradation (as well as to chemicals and alkalies), high hardness, and outstanding tensile strength for a plastic in the case of rigid PVC.

2020年1月13日 · PVC plastics are the third most commonly used types of plastic polymers used. Learn about the properties of PVC polyvinyl chloride plastics.

PVC, a synthetic resin made from the polymerization of vinyl chloride. Second only to polyethylene among the plastics in production and consumption, PVC is used in an enormous range of domestic and industrial products, from raincoats and shower curtains to window frames and indoor plumbing.

Understanding the CTE of PVC and accounting for its expansion and contraction characteristics is crucial for ensuring the integrity and functionality of PVC-based systems, particularly in applications where temperature variations are significant.

2023年12月5日 · PVC material is a durable and economical choice for many plumbing needs and is adaptable for other DIY home projects. In construction and residential interior applications, it’s used as an alternative to metal piping that is easy to cut. PVC also shows up in …

What is PVC? Polyvinyl chloride (PVC) was one of the first plastics discovered, and is also one of the most extensively used. It is derived from salt (57%) and oil or gas (43%). It is the world’s third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene.

2022年10月14日 · PVC helps conserve energy and water by creating virtually leak-free pipes that are not prone to corrosion and resist environmental stress. PVC breakage rates are as low as one percent of the breakage rates of cast metal systems.