锦纶66浸胶帘子布胶斑产生原因的探讨

Discussion of reasons for gum stains of polyamide 66 dipped tire cord fabric

分析了锦纶66浸胶帘子布胶斑产生的原因,讨论了浸胶液质量、干燥区温度、湿度、风速和排风量对胶斑形成的影响。结果表明:锦纶66浸胶帘子布的浸胶液中,间苯二酚与甲醛反应越彻底,胶斑的生成量越少;采用乙烯基吡啶胶乳制成浸胶液,并添加氢氧化钠和氨水,控制其pH值为11.2±0.5,当干燥区温度为(150±1)℃,风速18 m/s,干燥A区相对湿度(24±15)%和排风量140 m3/min,干燥B区相对湿度(18±1)%和排风量25 m3/min,供风机风量为2 200 m3/min,风速为18 m/s,选择棱角形塔顶辊,安装可调式自动清胶器,抑制胶斑形成的效果显著。

The reasons for gum stains of polyamide 66 dipped tire cord fabric were analyzed.The effects of dip solution quality,drying region temperature,humidity,air speed and exhaust air rate on the formation of gum stains were discussed.The results showed that the more completely the reaction between resorcinol and formaldehyde proceeded in the dip solution for polyamide 66 tire cord fabric,the less the gum stains formed; and the formation of the gum stains could be efficiently depressed by using vinylpyridine latex for the dip solution,adding sodium hydroxide and ammonia to control the pH value of 11.2 ± 0.5,controlling the drying region temperature（150 ± 1）℃ and air speed 18 m/s,relaive humidity and exhaust air rate of （24 ± 15）% and 140m3/min for drying region A and （18 ± 1）% and 25 m3/min for drying region B respectively,air volumn 2 200 m3/min and air speed 18 m/s of the fan,choosing an edged column top roll and installing an adjustable automatic gum stain cleaner