地面辐射采暖用PA6/LLDPE-g-MAH/PE-RT共挤复合管材的制备与性能研究

Preparation and Properties of PA6/LLDPE-g-MAH/PE-RT Co-extrusion Composite Pipe for Radiant Floor Heating

以尼龙6(PA6)作为内层,以线性低密度聚乙烯接枝马来酸酐(LLDPE-g-MAH)粘结树脂作为中间层,与耐热聚乙烯(PE-RT)通过共挤机头采用三层共挤工艺来制备地面辐射采暖用PA6/LLDPE-g-MAH/PE-RT共挤复合管材,介绍了共挤复合管材的原料和设备选择及工艺设定,表征了复合管材的物理力学性能。经产品试制和检验表明:PA6/LLDPE-g-MAH/PE-RT共挤复合管材的表面光滑平整,流体阻力降低了25.8%,拉伸强度提高了15%,95℃爆破压力提高了37.8%,改善了耐热聚乙烯(PE-RT)单层管道易结垢堵塞和耐热强度不足的问题,而且该复合管材工艺简单易于生产。

The three- layer co - extrusion process was used to prepare PA6 / LLDPE - g - MAH / PE - RT co - extrusion composite pipe for radiant floor heating, heat - resistant polyethylene （ PE - RT） was co - extruded with nylon 6 （ PA6 ） as the inner layer, and linear low density polyethylene grafted maleic anhydride （ LLDPE - g - MAH） adhesive resin was used as the intermediate layer. The raw material and equipment selection and process setting of co - extruded composite pipe were introduced, the physical and mechanical properties of composite pipe were investigated by physical and mechanical test. The results show that the surface of PA6 / LLDPE - g - MAH / PE - RT co - extruded composite pipe is smooth, the fluid resistance is reduced by 25.8% , the tensile strength is increased by 15%, the burst pressure at 95 ℃ is increased by 37.8% , To improve the PE - RT pipe easy to clogging and heat - resistant strength of the problem, and the composite pipe process is simple and easy to produce.