CN112890322B - 一种吸附灭活病毒口罩产品 - Google Patents
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Abstract
本发明公开了一种吸附灭活病毒口罩产品,在口罩熔喷布滤材上固载吸附灭活病毒纳米功能材料制备吸附灭活病毒熔喷布滤材,该类型口罩产品从外至内依次由疏水纺粘布、吸附灭活病毒熔喷布滤材和吸水纺粘布组成。本发明的吸附灭活病毒口罩产品不仅能够高效过滤粉尘,而且能够吸附灭活新型冠状病毒(COVID‑19)。
Description
技术领域
本发明涉及一种吸附灭活病毒口罩产品,属于防护设备技术领域。
背景技术
目前,市场上效果较好的口罩如N95、N99型等,其核心滤材是聚丙烯熔喷布。通过聚丙烯熔喷布滤材的阻隔作用,对粘附病毒的飞沫进行阻隔,但这种方式仅起到隔绝病毒的作用,并不能有效灭活病毒,因此,该类口罩在使用过程中和废弃时仍然存在很大的感染风险。
发明内容
本发明的目的在于提供一种吸附灭活病毒口罩产品,将吸附灭活病毒纳米功能材料固载到熔喷布滤材中,制备吸附灭活病毒熔喷布滤材,并将其应用于口罩的生产中,制备吸附灭活病毒口罩产品。
所述的吸附灭活病毒熔喷布滤材,在聚丙烯熔喷布生产设备上加装吸附灭活病毒纳米功能材料喷涂装置,将吸附灭活病毒纳米功能材料喷涂固载到特定温度范围的聚丙烯熔喷布纤维上,从而制备吸附灭活病毒熔喷布滤材。
本发明的另一目的在于提供一种吸附灭活病毒口罩产品的生产方法,该类型口罩从外至内依次包括疏水纺粘层、吸附灭活病毒熔喷布滤材和吸水纺粘层。
可选地,所述吸附灭活病毒熔喷布滤材的制备方法包括,在聚丙烯熔喷布生产设备上加装吸附灭活病毒纳米功能材料喷涂装置,将吸附灭活病毒纳米功能材料喷涂固载到特定温度范围的半成品聚丙烯熔喷布纤维上,从而制备吸附灭活病毒熔喷布滤材。
可选地,所述的吸附灭活病毒聚熔喷布滤材,面密度为5-100g/m2。
可选地,所述的吸附灭活病毒聚丙烯熔喷布滤材上固载的吸附灭活病毒纳米功能材料质量含量为0.2~50%。
可选地,所述的吸附灭活病毒纳米功能材料喷涂装置,包含气固两相喷射喷嘴,通过高温高压气体输送,实现吸附灭活病毒纳米功能材料的喷涂。
可选地,所述的高温高压输送气体,输送气体温度为80~300℃、压力为0.2~10MPa。
可选地,所述的吸附灭活病毒纳米功能材料喷涂装置和吸附灭活病毒纳米功能材料的喷涂位置位于电晕放电驻极操作之前。
可选地,为了实现吸附灭活病毒纳米功能材料与熔喷布纤维牢固的结合,喷涂吸附灭活病毒纳米功能材料时保持半成品聚丙烯熔喷布纤维的温度范围为80~180℃。
可选地,所述的吸附灭活病毒纳米功能材料为氧化锆、氧化锌、氧化铝、硅酸钙、氧化钛和A型、X型分子筛中的一种或几种的混合。
可选地,所述的吸附灭活病毒纳米功能材料,其特征在于,粒径为 5~100nm。
本发明产生的有益效果包括:
本发明将吸附灭活病毒纳米功能材料固载在熔喷布滤材上,并应用于口罩产品的制备。制备的吸附灭活病毒口罩产品从外至内依次包括疏水纺粘层、吸附灭活病毒熔喷布滤材和吸水纺粘层,解决了现有口罩不能吸附灭活病毒的问题。
本发明制备的吸附灭活病毒口罩过滤效率不仅达到了GB/T 32610-2016《日常防护型口罩技术规范》规定的I级标准,该类口罩产品不仅能够高效过滤粉尘,而且能够高效吸附灭活新型冠状病毒 (COVID-19)。
附图说明
图1为本发明提供的吸附灭活病毒熔喷布生产设备结构示意图。
图2为本发明制备的吸附灭活病毒熔喷布滤材(YG-B8)处理新型冠状病毒(COVID-19)后,剩余上清液中病毒核酸的扩增曲线。
图3为本发明制备的吸附灭活病毒熔喷布滤材(YG-B8)处理新型冠状病毒(COVID-19)后,剩余上清液中病毒含量相对于无处理组的减少百分比。
图4为本发明制备的吸附灭活病毒口罩产品质量检测报告。
具体实施方式
下面结合实施例详述本发明,但本发明并不局限于这些实施例。同时实施例只是给出实现制备吸附灭活病毒口罩生产的部分条件,但并不意味着必须满足这些条件才可以达到此目的。
如无特别说明,实施例中所采用原料均来自商业购买,仪器设备采用厂家推荐的参数设置。
实施例1吸附灭活病毒熔喷布滤材的制备
采用商业购买的熔喷布专用聚丙烯(PP)为原料进行生产,原料颗粒的粒径为3~5mm,熔体的灰分小于100ppm,熔体含水量小于0.2%。
图1为本发明中吸附灭活病毒熔喷布生产设备结构示意图,其中:聚丙烯母粒进料斗1、螺杆挤出机2、压缩气体加热器3、聚丙烯熔体喷射模头4、吸附灭活病毒纳米功能材料加料斗5、吸附灭活病毒纳米功能材料喷涂装置6、压缩气体加热器7、气固两相喷射喷嘴8、输网帘9、热轧辊 10、电晕放电驻极设备11、卷布机12。
吸附灭活病毒熔喷布滤材的制备步骤如下:
步骤一、将聚丙烯母粒加入到聚丙烯母粒进料斗1中,螺杆挤出机2 使母粒加热形成熔体;螺杆挤出机2中共3个控温加热区,其中一区温度为175~185℃,二区温度为240~260℃,三区温度为240~260℃。
步骤二、熔体从螺杆挤出机2中挤出,与压力为0.3MPa、温度为280℃的压缩空气(从压缩气体加热器3)一起进入聚丙烯溶体喷射模头4;聚丙烯溶体喷射模头为单模头,喷丝孔数为150个,熔体喷射模头温度为 240~260℃;熔体从聚丙烯溶体喷射模头4中喷出后,经气流牵引形成纤维铺设到输网帘9上。
步骤三、将粒径分布为20~70nm的吸附灭活病毒纳米功能材料(包含氧化锌、氧化锆、氧化铝、氧化钛和13X分子筛,质量比为5:2:10:7:5) 加入到吸附灭活病毒纳米功能材料加料斗5中;上述吸附灭活病毒纳米功能材料在压力为0.5MPa、温度为150℃的压缩空气作用下,经气固两相喷射喷嘴7喷涂到温度为130~150℃的半成品聚丙烯熔喷布纤维上。
步骤四、经步骤三处理后的熔喷布,经过热轧辊10处理,轧压温度为120℃,轧压线压力为8Kgf/cm。
步骤五、经步骤四处理的熔喷布进入电晕放电驻极设备11中进行驻极处理,驻极电压为40KV,驻极时间为1min,驻极距离为3cm。
上述制备的吸附灭活病毒熔喷布滤材命名为YG-B8。
称重测量吸附灭活病毒聚丙烯熔喷布上固载的吸附灭活病毒纳米功能材料质量含量为22.6%。
实施例2吸附灭活病毒熔喷布滤材(YG-B8)吸附灭活新型冠状病毒 (COVID-19)的体外试验
测试材料:
1.受试物
实施例1中所制备的吸附灭活病毒聚丙烯熔喷布(YG-B8)。
2.病毒株
COVID-19冠状病毒由CDC实验室从病人咽拭子中分离的病毒BetaCoV/Anhui/SZ005/2020(EPI_ISL_413485),第一代。
3.试验方法
取2cm×10cm面积的吸附灭活病毒聚丙烯熔喷布(YG-B8)(含吸附灭活病毒纳米功能材料17.5mg)放入无菌1.5ml EP管,加入800μl的 COVID-19病毒液(3.5×108拷贝数病毒)混合均匀后,每间隔5分钟摇动一次。在室温下作用30分钟后,3000rpm离心5分钟,每管吸取250μl 上清液于新的无菌EP管中(保证每管吸取上清液等量)。此后,对上清液进行处理后提取RNA。每管提取的RNA做3个重复的qRT-PCR实验(逆转录定量聚合酶链式反应)。
4.试验结果
吸附灭活病毒聚丙烯熔喷布(YG-B8)吸附灭活新型冠状病毒 (COVID-19)的体外试验结果如图2和图3所示。其中,无处理是指对病毒液无处理。
5.结论
试验结果表明吸附灭活病毒聚丙烯熔喷布(YG-B8)具有直接吸附灭活新型冠状病毒(COVID-19)的作用,2cm×10cm面积的吸附灭活病毒聚丙烯熔喷布(YG-B8)(含吸附灭活病毒纳米功能材料17.5mg)对3.5×108拷贝数的新型冠状病毒(COVID-19)吸附灭活效率为82%。
实施例3吸附灭活病毒口罩产品的制备
将实施例1制备的吸附灭活病毒熔喷布滤材(YG-B8)放商业购买的疏水纺粘布(口罩外层)和吸水纺粘布(口罩内层)之间,在口罩生产机上制成口罩产品。此类口罩从外至内依次包括疏水纺粘布、吸附灭活病毒熔喷布滤材和吸水纺粘布三层。
实施例4吸附灭活病毒口罩产品性能检测
吸附灭活病毒口罩产品委托大连市产品质量检验检测研究院有限公司依据GB/T32610-2016《日常防护型口罩技术规范》进行了检测,结果如图4所示,口罩产品各项指标合格。具体指标为:过滤效率≥99%(I 级),吸气阻力为100Pa(标准≤175),呼气阻力为82Pa(标准≤145),甲醛、大肠杆菌及致病性化脓菌均为未检出,细菌菌落总数为48CFU/g (标准≤200),真菌菌落总数为4CFU/g(标准≤100)。
以上所述,仅是本发明的几个实施例,并非对本发明做任何形式的限制,虽然本发明以较佳实施例揭示如上,然而并非用以限制本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案的范围内,利用上述揭示的技术内容做出些许的变动或修饰均等同于等效实施案例,均属于技术方案范围内。
Claims (3)
1.一种吸附灭活病毒口罩产品,其特征在于,在口罩熔喷布滤材上固载吸附灭活病毒纳米功能材料以制备吸附灭活病毒熔喷布滤材,所述口罩产品从外至内依次由疏水纺粘布、吸附灭活病毒熔喷布滤材和吸水纺粘布组成;
所述吸附灭活病毒熔喷布滤材通过以下设备得到:
所述设备包括:聚丙烯母粒进料斗、螺杆挤出机、压缩气体加热器、聚丙烯熔体喷射模头、吸附灭活病毒纳米功能材料加料斗、吸附灭活病毒纳米功能材料喷涂装置、压缩气体加热器、气固两相喷射喷嘴、输网帘、热轧辊、电晕放电驻极设备、卷布机;
所述吸附灭活病毒熔喷布滤材通过以下步骤得到:
步骤一、将聚丙烯母粒加入到聚丙烯母粒进料斗中,螺杆挤出机使母粒加热形成熔体;螺杆挤出机中共3个控温加热区,其中一区温度为175~185℃,二区温度为240~260℃,三区温度为240~260℃;
步骤二、熔体从螺杆挤出机中挤出,与压力为0.3 MPa、温度为280℃的从压缩气体加热器进入的压缩空气一起进入聚丙烯熔体喷射模头;聚丙烯熔体喷射模头为单模头,喷丝孔数为150个,熔体喷射模头温度为240~260℃;熔体从聚丙烯熔体喷射模头中喷出后,经气流牵引形成纤维铺设到输网帘上;
步骤三、将粒径分布为20~70 nm的吸附灭活病毒纳米功能材料加入到吸附灭活病毒纳米功能材料加料斗中;所述吸附灭活病毒纳米功能材料在压力为0.5 MPa、温度为150℃的压缩空气作用下,经气固两相喷射喷嘴喷涂到温度为130~150 ℃的半成品聚丙烯熔喷布纤维上;
步骤四、经步骤三处理后的熔喷布,经过热轧辊处理,轧压温度为120℃,轧压线压力为8Kgf/cm;
步骤五、经步骤四处理的熔喷布进入电晕放电驻极设备中进行驻极处理,驻极电压为40 KV,驻极时间为1 min,驻极距离为3 cm,得到所述吸附灭活病毒熔喷布滤材;
其中所述吸附灭活病毒纳米功能材料包括氧化锌、氧化锆、氧化铝、氧化钛和13X分子筛;质量比为5:2:10:7:5。
2.根据权利要求1所述的吸附灭活病毒口罩产品,其特征在于,所述吸附灭活病毒熔喷布滤材面密度为5~100 g/m2;所述的吸附灭活病毒聚丙烯熔喷布滤材上固载的吸附灭活病毒纳米功能材料质量含量为0.2~50 %。
3.根据权利要求2所述的吸附灭活病毒口罩产品,其特征在于,所述吸附灭活病毒纳米功能材料粒径为5~100 nm。
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