以聚乙烯(PE)、超细化氢氧化镁(MH)/PE环保阻燃母粒(或超细化氢氧化镁(MH))、尼龙6(PA6)及聚乙烯接枝马来酸酐(PE-g-MAH)为原料,采用熔融挤出法制备了聚乙烯瓦斯隔离板片材,并研究了不同原料的种类和用量对其阻燃性能、阻气性能及力学性能的影响。研究结果表明,超细化氢氧化镁(MH)/PE环保阻燃母粒复配阻燃体系具有更好的阻燃效果,且添加量低;尼龙6(PA6)和相容剂PE-g-MAH的加入明显提高了瓦斯隔离板的气体阻隔性能;制备的聚乙烯瓦斯隔离板的力学性能满足《高分子防水材料》(GB18173.1-2012)的基本要求(拉伸强度≥16 MPa,断裂伸长率≥550%)。 Polyethylene (PE), ultrafine magnesium hydroxide (MH) / PE flame-retardant masterbatch (or ultrafine magnesium hydroxide), nylon 6 (PA6) and polyethylene grafted maleic anhydride PE-g-MAH) as raw materials, the polyethylene gas insulation separator sheet was prepared by melt extrusion method, and the effects of different kinds of raw materials on the flame retardancy, gas barrier properties and mechanical properties were studied. The results show that the flame retardant superfine magnesium hydroxide (MH) / PE flame retardant composite flame retardant system has better flame retardant effect, and the added amount is low; nylon 6 (PA6) and compatibilizer PE-g The addition of -MAH significantly improves the gas barrier performance of the gas barrier. The mechanical properties of the prepared polyethylene gas barrier meet the basic requirements of “polymer waterproof material” (GB18173.1-2012) (tensile strength ≥16 MPa, Elongation at break ≥550%).