何本もある加熱したロールに、原料を通して圧延したあと、冷却ロールに通して厚みを調整し、材料を巻き取ることで、シートやフィルム状の塩ビを成形します。
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パイプなどのように、断面形状がシンプルな形状の製品を作るのに適しています。口金の形状を変えることで、押し出される製品も形を変えられます。
مشکلات بهداشتی پلاستیک و ترکیب پلیهالوژنه (پیاچسی)
The resulting item is refined to produce pure white PVC. It can be recycled around 7 periods. Its lifespan is about a hundred and forty years.
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Whilst you will discover specific applications, we wouldn't recommend an expanded PVC sheet, it remains to be significantly stronger plus much more sturdy than other similar plastic solutions. As an example, it will supply many years of use when put in being an upholstery foundation or simply a seat back panel.
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Sure Way of living possibilities and overall health situations may make anyone additional very likely to produce premature ventricular contractions (PVCs).
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比較的小さな分子であるモノマーが、繰り返し結合したものをポリマーと呼びますが、この繰り返し結合した度合いのことを「重合度」と呼びます。
در دنیای امروز کارتهای پیویسی کاربرد زیادی در زندگی روزانهٔ مردم دارند؛ زیرا این کارتها برای خرید، عبور و مرور، حمل و نقل عمومی (مترو یا اتوبوس)، بانک و … مورد استفاده قرار میگیرند.