以田口法探討影響磁磚接著結合強度之關鍵因子

The Study of Factors Affecting Tensile Adhesion Strength on Ceramic Tile by Using the Taguchi Method

本研究係針對水泥質磁磚接著劑在不同材料及施工環境的變數，如水泥質材料組成、樹脂成份、樹脂掺量、施工環境溫度、與晾置時間（Open Time）等控制因子對磁磚（拋光磚）的抗拉接著強度的影響，採用田口法（Taguchi Method）中的L18（21*37）直交表進行實驗。實驗結果顯示，八個控制因子中影響磁磚抗拉接著強度的前四大因子，依序為晾置時間（open time）、分散型樹脂粉末掺量、水泥質材料的組成、與施工環境溫度。其中又以晾置時間影響最為顯著。晾置時間越久、抗拉接著強度急遽降低。最佳組合配比（Optimum design）的確認實驗結果顯示抗拉接著強度有提高，且與預測結果相似，但S/N ratio（訊噪比）的預測值大於實測值，因此推論各控制因子間可能存有交互作用，值得進一步研究與探討。綜合實驗結果於實務上則建議：（1）塗佈膠泥到貼磁磚的時段不應超過5 分鐘，（2）應於基材及磁磚背面都塗抹膠泥，以增加膠泥黏著力。

Homogenous tile with polished finishing（ polished tile） has been widely used in the residential, commercial, and industrial projects due to its durability resulting from low porosity. Yet, the bonding of polished tile has become a subject of interest because many tile installation failures were reported recently. Tiles de-bonding may be resulted from unskillful workmanship, poor substrate preparation, inadequate mixture design of tile adhesives, or compound reasons. In this study, the experiments were designed using an L18（ 21 x37） orthogonal array with eight factors, namely open time, ambient temperature, various dosages of different types of polymers. The responses investigated were tensile adhesion strength at various ages, and fractured mortar areas. The obtained results were evaluated statistically. It was found that the tensile adhesion strength and fractured mortar areas were most significantly influenced by the open time, followed by dosage of re-dispersible polymer powder, proportion of cementitious composition, and ambient temperature, while types of re-dispersible polymers and water soluble polymer were insignificant. The confirmatory tests also indicated that the optimized tensile adhesion strengths after various aging had increased to the level similar to the estimated values. Nevertheless, the estimated S/N ratio was greater than the experimental result, which suggests that some interactions may be existed among control factors. In practice, the open time should not exceed 5 minutes and apply tile adhesive to both the substrate and the back of the tile are recommended.