本研究目的為混合團狀模塑(BMC，Bulk molding compound)材料置於模具後以熱壓成型技術製作出BMC拉伸試片，搭配材料拉伸試驗機與蕭氏硬度計來取得實驗數據，再將實驗數據以田口方法找出BMC材料最佳實驗參數並探討添加物在不同水準比例情況下與機械性質之間關係。實驗以田口L9直交表選用苯乙烯單體、石墨粉末、玻璃纖維以及低輪廓添加劑；對BMC材料成形中最有影響力的四個因子進行分析，分析結果顯示，石墨之添加量與硬度關係最為密切，在拉伸強度方面則為玻璃纖維之添加量，經由預測及驗證分析後，BMC最佳化配方為低輪廓添加劑4 wt%、玻璃纖維15wt%、石墨30 wt%、苯乙烯單體4 wt%，按照此添加比例製做出的BMC試片具有最佳之成型性以及最佳之機械性質。

關鍵字：玻璃纖維、BMC、團狀模塑料

The purpose of this study is a mixed BMC material and placed in a mold using thermoforming technology to produce BMC tensile test piece, with tensile testing machine and Shore Durometer hardness to obtain experimental data. Analysis of optimum parameters of BMC material and then the experimental data using the Taguchi method and explore the relationship between the mechanical properties of the additive levels in different proportions situation. Experiment with Taguchi L9 orthogonal array selection styrene monomer, graphite powder, glass fiber and low profile additives; for BMC material forming the most influential of the four factors were analyzed and the results showed that the amount of graphite and between hardness most closely in terms of the relationship between the tensile strength is the amount of glass fibers.After the best analysis predicted and verified, BMC optimized formulation for the low-profile additive 4 wt%, glass fiber 15wt%, graphite 30 wt%, styrene monomer 4 wt%, as previously this formulation manufactured BMC specimens with the most best of formability and the best of the mechanical properties.

Keyword: glass fiber, BMC, Bulk molding compound

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