相關標簽:三菱工程塑料 PC、印度Gas PC、美國Entec PC塑料原材料、抗化學性 PC、低萃取物 PC、低揮發 PC塑料原材料
PC塑料成型溫度多少?成型溫度:230-320℃。
PC由于其優異的機械性能而通常被稱為聚碳酸酯,通常被稱為防彈橡膠。PC具有機械強度高,工作溫度范圍寬,電絕緣性能好(但電弧保護性能不變),尺寸穩定性好和透明性的特點。它廣泛用于電氣產品,電氣儀表外殼和電子產品結構零件。PC的改性產品很多,通常會添加玻璃纖維,礦物填料,化學阻燃劑和其他塑料。PC具有差的流動性和較高的加工溫度,因此加工多種等級的改性材料需要特殊的塑化注射結構。PC具有較大的吸水率。在處理之前,必須對其進行預熱和干燥。純PC在120°C下干燥。改性PC通常在110°C下干燥4小時以上。干燥時間不應超過10小時。通常,可以使用空氣擠出法來判斷干燥是否足夠。回收材料的比例可以達到20%。在某些情況下,可以使用100%的回收材料。實際數量取決于產品的質量要求。再生材料不能同時混合不同的母料,否則最終產品的性能將受到嚴重損害。2.注塑機的選擇當前的PC產品由于成本和其他原因,多用途的改性材料,尤其是電氣產品,還必須提高耐火性。在模制阻燃PC和其他塑料合金產品時,對注塑機塑化系統的要求是具有良好的混合性和耐腐蝕性。在特殊情況下需要特殊螺釘。3.模具和澆口設計普通模具溫度為80-100°C,玻璃纖維為100-130°C。針型澆口可用于小產品。澆口深度應為最厚部分的70%。其他門是環形和矩形。澆口越大,越好,以減少過大剪切所引起的塑性。排氣孔的深度應小于0.03-0.06MM。。脫模斜率通常為約30'-1。4.熔體溫度空氣注入可用于確定處理溫度。通常,PC的加工溫度為270-320℃,某些改性或低分子量PC的加工溫度為230-270℃。5.注射速度通常以較高的注射速度進行成型,例如打電氣開關。常見的是緩慢→快速原型制作。6.背壓可以適當降低約10BAR的背壓,而不會出現空氣條紋和顏色混合。7.滯留時間如果高溫下的停留時間過長,則材料會降解,并且會釋放出CO2,并變為黃色。請勿使用LDPE,POM,ABS或PA清潔機筒。應用PS清理。8.注意事項
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阻燃 其它 其它 | 白灰色 |
F1室外防紫外線 |
性能項目 | 試驗條件[狀態] | 測試方法 | 測試數據 | |
比重 | 73℃ F | ASTM D-792 | 1.23 | ——- |
缺口沖擊強度 | 73℃ F | ASTM D-256 | 13 | ft-lb/in |
拉伸強度 | 73℃ F | ASTM D-638 | 8800 | psi |
成型收縮率 | 73℃ F | Matrizz Thermal | 5-7 | In/in×1000 |
熔融指數 | 300℃/1.2kg | ASTM D-1238 | 10 | dg/min |
彎曲模量 | 73℃ F | ASTM D-790 | 325 | kpsi |
烘干溫度 | ——- | UL 746 | 115 | ℃ |
燃燒性 | 3.0mm/2.5mm/1.5mm | UL 94 | 5VA/5VA/V0 | ——- |
熱變形溫度 | 66psi/264psi | ASTM D-648 | 265/260 | ℃ |
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