PP/PE医用淋膜非织造布的制备及性能研究

Preparation and properties of PP/PE medical coated nonwovens

以聚丙烯(PP)纺黏非织造布为基布,采用淋膜复合工艺将聚乙烯(PE)熔融涂覆在PP纺黏非织造布表面,再经冷却、定型后制得PP/PE医用淋膜非织造布,研究了其微观形貌及各种性能。结果表明:与PP纺黏非织造布相比,经PE淋膜复合的PP纺黏非织造布中纤维周围可观察到许多微小气泡,面密度、厚度、断裂强力、顶破强力、水接触角、热稳定性增大,撕破强力、透气率、透湿量减小;PP/PE医用淋膜非织造布的面密度和厚度与其断裂强力、顶破强力、撕破强力、水接触角、热稳定性正相关,与其透气性、透湿性负相关;PP/PE医用淋膜非织造布疏水、阻气,是医用一次性防护服的适宜选择。

Polypropylene/polyethylene(PP/PE)medical coated nonwovens were prepared by coating molten PE on the surface of PP spunbonded nonwovens by coating composite process prior to cooling and setting using PP spunbonded nonwovens as the base cloth.The micro-morphology and properties of the nonwovens were studied.The results showed that many tiny bubbles can be observed around the fibers in PP spunbonded nonwovens after PE coating,and the surface density,thickness,breaking strength,bursting strength,water contact angle and thermal stability increased,while the tearing strength,air permeability and moisture permeability decreased;the surface density and thickness of PP/PE medical coated nonwovens were positively related to their breaking strength,bursting strength,tearing strength,water contact angle and thermal stability,and negatively related to their air permeability and moisture permeability;and PP/PE medical coated nonwoven was a suitable choice for disposable medical protective clothing due to its hydrophobicity and gas resistance.