目的 研究喷砂及涂布粘结剂对不同托盘材料与硅橡胶结合强度的影响.方法 制作不锈钢、自凝树脂、光固化树脂标准试件各40个,随机分组,每组同材质试件各10个,空白组:对试件不做处理;喷砂组:对试件进行喷砂处理;粘结剂组:对试件涂布托盘粘结剂;喷砂+粘结剂组:对试件喷砂后涂布粘结剂处理,与硅橡胶材料在测试装置中接触结合,行拉伸实验,记录结果,计算结合强度.结果 3种托盘材料均在喷砂加粘结剂处理时表现出最佳的结合强度;单独使用喷砂时,树脂材质托盘结合强度与空白组相比明显提高,而不锈钢托盘结合强度却下降明显;单独使用粘结剂时,与空白组相比,3种材质托盘结合强度均有显著提高.结论 联合使用喷砂和粘结剂可显著提高托盘与硅橡胶结合强度,对树脂材料托盘单独使用粘结剂或喷砂有一定增加托盘结合强度的作用,金属托盘使用粘结剂亦可增加托盘结合强度.%Objective To study the effect of sand blasting and coating binder on the bonding strength of different tray materials and silicone rubber. Methods Stainless steel, auto polymerizing acrylic resin and light cured resin were selected as tray materials. 40 standard test pieces were made of each kind of tray materials. They were randomly divided into four groups with the same material speci-mens, control group:the specimens were not treated;binder group:the specimens were coated with tray adhesive;sandblasting group:the specimens were sandblasted;spray sand and binder group: specimens were sandblasted and then coated with tray adhesive, and contacted and bonded with silicone rubber material in testing device, then tensile test was conducted, and the results of the calculated binding strength were recorded. Results When sand blasting and binder were used, the binding strength of the three materials was the highest. When sand blasting was used alone, the binding strength of the resin material obviously increased, while the strength of the stainless steel decreased obviously. When the binder was used alone, the binding strength of the three materials significantly improved. Conclusion The best combination of sand and binder significantly improves the bonding strength of the pallet. The use of adhesive or sand blasting in the resin material tray has a certain effect on increasing the bonding strength of the tray. Metal tray using binder can al-so increase the strength of the tray.
展开▼
