三维网孔热风非织造布的制备及其在吸收芯体中的应用

Preparation of hot air nonwoven fabric with three-dimensional mesh and its application in absorbent core

以聚丙烯/聚乙烯(PP/PE)皮芯纤维和三维卷曲中空涤纶纤维为原料,通过杂乱凝聚技术梳理成网再经热风加固技术制备三维网孔热风非织造布,探讨面密度、原料质量配比对非织造布的厚度、蓬松度、压缩率和压缩弹性率的影响;将热风非织造布用于制备吸收芯体,并对吸收芯体的厚度、液体吸收时间、回渗量进行测试。结果表明:当选用的PP/PE皮芯纤维和中空涤纶纤维质量配比为70/30时,制得面密度为50 g/m^(2)的三维网孔热风非织造布的蓬松度为81 cm 3/g,具有较好的立体空间构造,可有效容纳高吸水树脂(SAP)颗粒;由热风非织造布制得的吸收芯体的吸收时间短、回渗量低、无起坨断层现象,可有效解决SAP吸液后的凝胶堵塞问题。

The polypropylene/polyethylene(PP/PE)skin-core fiber and three-dimensional curly hollow polyester fiber were used as raw materials to prepare hot air nonwovens with three-dimensional mesh by combing into a web through the disordered coalescence technique and hot air reinforcement technique.The effects of areal density and raw material mass ratio on thickness,bulkiness,compression ratio and compression elasticity of the nonwovens were investigated.The nonwoven specimens were used to prepare absorbent cores,and the thickness,liquid absorption time and the amount of re-infiltration of the cores were tested.The results show that when the mass ratio of PP/PE skin-core fiber to hollow polyester fiber is 70/30,the three-dimensional web hot air nonwoven fabric with areal density of 50 g/m 2 has a bulkiness of 81 cm 3/g,which means it has an excellent three-dimensional structure,resulting in the excellent capacity of holding super absorbent polymer(SAP)particles.The absorbent core made by the above nonwovens has short absorption time,low repermeability rate,no clogging and fracture.The issue of gel clogging after SAP absorption can be effectively resolved.