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Composite electret polypropylene meltblown nonwovens developed and its performance

Author: KangWeiMin
Tutor: ChengBoWen；JiaoXiaoNing
School: Tianjin Polytechnic University
Course: Materials Processing Engineering
Keywords: Complex Electret Polypropylene Meltblown nonwoven Performance
CLC: TS176
Type: Master's thesis
Year: 2005
Downloads: 282
Quote: 0
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Abstract


Special tourmaline polypropylene resin with a high concentration ( about 25% ) Special tourmaline modified meltblown grade polypropylene masterbatch , by mixing the masterbatch and polypropylene slice through conventional meltblowing processes obtained meltblown nonwoven fabric , and then subjected to a corona discharge treatment , and to create a new composite electret meltblown polypropylene microfiber nonwoven fabric . The rheological properties of the modified masterbatch testing as well as spinning experiments to explore the modified masterbatch spinnability . The study showed that: using special tourmaline weight of 2 to 5% coupling agent titanates , 3 to 4 % low density polyethylene wax, and a small amount of antioxidant surface treatment good tourmaline can be well dispersed in the polypropylene resin . Fumble through repeated practice , we have identified a more excellent in a very meltblown nonwovens process route prepared tourmaline content of 0% , 3% , 6% and 8% four electret polypropylene meltblown woven fabric, and their performance tested . The study found that: the corona discharge of the polypropylene meltblown nonwoven fabric in the pole , and not only can greatly improve its filtration efficiency , but also decreased filtration resistance , adding special tourmaline particles further enhance electret polypropylene meltblown nonwoven fabric The filtration performance, the surface charge density of the webs increased significantly in polar charge storage capacity has also been enhanced , wherein the tourmaline content of 6% , in a very consolidated best results , the surface charge density of up to 10 μC / m 2 on the small diameter 0.26μm particles , the filtration resistance 9.2Pa , the filter efficiency of 95.8% . After treatment for 12 hours at higher temperatures , the composite in a very polypropylene meltblown nonwoven filtration efficiency declining trend was significantly lower than the pure polypropylene electret melt blown nonwoven fabric . In addition, thermal properties, mechanical properties , as well as the quality of protofibers specific resistance analysis, the surface morphology of non-woven cloth , mechanical properties , permeability , and water vapor permeability properties have been studied , and found that the composite electret polypropylene meltblown nonwovens also have far-infrared emission and antibacterial function .

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CLC: > Industrial Technology > Light industry,handicrafts > Textile industry,dyeing and finishing industry > Non-woven fabric > Various non- woven fabric
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