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--- everplast:plastic_materials:hdpe [2019/08/10 22:00] – created jonathan_tsai
+++ everplast:plastic_materials:hdpe [2019/09/28 00:52] (current) – [Reference URL] jonathan_tsai
@@ Line 1: / Line 1: @@
-====== HDPE (高密度聚乙烯) ======
+====== HDPE ======
-高密度聚乙烯（HDPE）或聚乙烯高密度（PEHD）是由單體乙烯製備的熱塑性 聚合物。當用於HDPE管時，它有時被稱為“alkathene”或“聚乙烯” 。HDPE具有高強度密度比，可用於生產塑料瓶，耐腐蝕管道，土工膜和塑料木材。HDPE通常是回收的，並且具有數字“2”作為其樹脂識別碼。
+High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is a thermoplastic polymer produced from the monomer ethylene. It is sometimes called "alkathene" or "polythene" when used for HDPE pipes. With a high strength-to-density ratio, HDPE is used in the production of plastic bottles, corrosion-resistant piping, geomembranes and plastic lumber. HDPE is commonly recycled, and has the number "2" as its resin identification code.
-===== 屬性 =====
+===== Properties =====
-HDPE因其高強度密度比而聞名。HDPE的密度範圍為 930 至 970 kg/m³。雖然HDPE的密度僅略高於低密度聚乙烯的密度，但HDPE的支化很少，使其具有比LDPE 更強的分子間作用力和拉伸強度。強度差異超過密度差異，使HDPE具有更高的比強度。它也更硬，更不透明，可以承受更高的溫度（短時間內120°C / 248°F）。與高密度聚乙烯不同聚丙烯，不能承受通常所需的高壓滅菌條件。通過適當選擇催化劑（例如，齊格勒 - 納塔催化劑）和反應條件確保不存在支化。
+HDPE is known for its high strength-to-density ratio. The density of HDPE can range from 930 to 970 kg/m³. Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength than LDPE. The difference in strength exceeds the difference in density, giving HDPE a higher specific strength. It is also harder and more opaque and can withstand somewhat higher temperatures (120 °C/248 °F for short periods). High-density polyethylene, unlike polypropylene, cannot withstand normally required autoclaving conditions. The lack of branching is ensured by an appropriate choice of catalyst (e.g., Ziegler–Natta catalysts) and reaction conditions.
-HDPE的物理性質可以根據用於製造特定樣品的模塑工藝而變化。在某種程度上，決定因素是用於識別特定過程的這些屬性的國際標準化測試方法。例如，在旋轉成型中，為了識別樣品的耐環境應力開裂性，使用缺口恆定拉伸載荷試驗（NCTL）。
+The physical properties of HDPE can vary depending on the molding process that is used to manufacture a specific sample; to some degree a determining factor are the international standardized testing methods employed to identify these properties for a specific process. For example, in Rotational Molding, to identify the environmental stress crack resistance of a sample, the Notched Constant Tensile Load Test (NCTL) is put to use.
-由於這些理想的性能，由HDPE構成的管道理想地適用於飲用水和廢水（風暴和污水）。
+Owing to these desirable properties, pipes constructed out of HDPE are ideally applicable for potable water, and waste water (storm and sewage).
 ===== Reference URL =====
   * https://en.wikipedia.org/wiki/High-density_polyethylene
+  * [[https://www.everplast.com.tw/hdpe-pipe-extrusion-line-2/|HDPE Pipe Extrusion Line]]
+  * [[https://www.everplast.com.tw/hdpe-screen-net-extrusion-line/|HDPE Screen Net Extrusion Line]]
+  * [[https://www.everplast.com.tw/800mm-hdpe-pipe-extrusion-line/|800mm HDPE Pipe Extrusion Line]]
+  * [[https://www.everplast.com.tw/350mm-hdpe-pipe-extrusion-line/|350mm HDPE Pipe Extrusion Line]]
+  * [[https://www.everplast.com.tw/hdpe-pipe-extrusion-line/|HDPE Pipe Extrusion Line]]
+  * [[https://www.everplast.com.tw/pe-pipe-line-for-electrical-cable-application/|PE Pipe Line for Electrical Cable Application
+]]