縫合線溫度對玻纖強化塑膠材料
之衝擊韌性研究

本研究利用射出成型技術，對不同模溫、料溫以雙點進料(有縫合線)、單點進料(無縫合線)方式下射出，分析該試片對於的衝擊韌性(impact toughness)。溫度感測器安裝在模具的模穴內縫合線位置，紀錄射出過程之即時溫度變化。塑膠材料有結晶性塑膠(尼龍，PA66)及非結晶性塑膠(聚碳酸酯，PC)，並添加玻璃纖維。再以電子顯微鏡(SEM)加以觀察，對衝擊破斷面及玻纖配向性(fiberglass orientation)來做進一步的分析及驗證。研究結果顯示，未添加玻纖之前，非結晶性塑膠(PC)抗衝擊能力較強。分別加入不同比例玻纖後，材料受力的方式將是以玻纖來承受較大的衝擊力量。故添加相同比例之玻纖的條件下，玻纖對於結晶性塑膠(PA66)的抗衝擊能力有較明顯的改善。而縫合線的溫度愈高，衝擊韌性也有大幅度提升的效果。

關鍵字

結晶性塑膠；非結晶性塑膠；縫合線；衝擊韌性；玻纖配向性

並列摘要

This study is to analyze the impact properties of Nylon 66 (PA66) and (Polycarbonate, PC). Specimens including the different melt and mold temperature by injection molding technique with a single gate (non-existing weld line) and a dual gates (existing weld line).Temperature sensor was assembled at the weld line location of the mold cavity to record the real time temperature. The plastic materials contain the crystalline plastic (Nylon, PA66) and the non-crystalline plastic (Polycarbonate, PC), which added the different proportions of fiberglass. Scanning electron microscopy (SEM) was used to observe the specimen cross-section and fiberglass orientation. Results show the ability of impact resistance of non-crystalline plastic (PC) is better than the crystalline plastic (PA66). The impact strength is distinct increase due to the fiberglass added when the fiberglass added to the crystalline plastic (PA66). The higher the weld line temperature is, the larger the impact toughness can be obtained.

並列關鍵字

crystalline plastic ； non-crystalline plastic ； weld line ； impact toughness ； fiberglass orientation

參考文獻

[7]林典翰，模內熔膠溫度於縫合線位置之機械性質研究，國立臺北科技大學製造科技研究所，2011。

[25]台灣百塑企業股份有限公司網站，http://www.multiplas.com.tw/。

[27]瑞士商奇石樂科技股份有限公司網站，http:// www.kistler.com。

[3]徐振欣，玻纖強化PA66 複合材料於縫合線之研究，國立台北科技大學製造科技研究所碩士論文，2010。

[9] Babur Ozcelik,“Investigation the effects of obstacle geometries and injection molding parameters on weld line strength using experimental and finite element methods in plastic injection molding “Gebze Institute of Technology, Volume 39, Issue 2, February 2012, pp. 275–281.

延伸閱讀

徐孟祺（2015）。含中心孔熱塑性梭織複合材料平板之破壞強度探討〔碩士論文，逢甲大學〕。華藝線上圖書館。https://doi.org/10.6341/fcu.M0253614
施峻源（2014）。含邊緣裂縫之纖維複合材料平板在板面受熱通量影響下之熱應力分析〔碩士論文，國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-2912201413502132
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縫合線溫度對玻纖強化塑膠材料之衝擊韌性研究

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