CN111358620A - 一种防护新冠病毒的护目镜 - Google Patents
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Abstract
本发明属于病毒防护技术领域,具体为一种防护新冠病毒的护目镜。本发明护目镜包括镜框、树脂镜片、橡胶圈、防护布、松紧带;两个树脂镜片通过镜框卡槽嵌入镜框内;橡胶圈内侧可与人脸眼睛部为密切贴合,橡胶圈与镜框之间为防护布,橡胶圈与镜框之间由若干支撑条连接、支撑、固定;松紧带系于橡胶圈两侧,用于将护目镜佩戴于头部;防护布采用复合高效防护新冠病毒材料,由三层材料构成,内外两层为丙纶纺粘无纺布,中间为超细旦驻极体熔喷纤维非织造布;该非织造布表面带有常驻静电场,当新冠病毒通过微滤滤材的空隙时,将被微滤滤材产生的静电场和弱电流所捕获且具有良好的透气性,符合NIOSH(美国国家职业安全卫生所)N99标准。
Description
技术领域
本发明属于病毒防护技术领域,具体涉及一种高效防护新冠病毒的护目镜。
背景技术
冠状病毒是自然界广泛存在的一大类病毒,其病毒颗粒的直径为60-120nm,平均直径为100nm,呈球形或椭球型。2019新型冠状病毒(2019-nCoV,引发COVID-19)是目前已知的第7种可以感染人的冠状病毒。患者在感染了冠状病毒后常见体征有呼吸道症状、发热、咳嗽、气促和呼吸困难等。在较严重病例中,感染可导致肺炎、严重急性呼吸综合征、多器官衰竭,甚至死亡。针对新冠病毒极强的传染性,卫生防疫专家强调目前可以确定的新冠肺炎传播途径主要为直接传播、气溶胶传播和接触传播。在抗疫过程中有千余名一线医护人员在正确佩戴N95/KN95口罩仍被新冠病毒感染,同时浙大科研团队首次发现眼泪及结膜分泌物存在新冠病毒且存在眼部传染新冠病毒的风险。作为密切接触新冠病毒患者及疑似病例的医务人员,因其工作性质和环境,在医护人员诊疗、护理操作过程中近距离接触经飞沫传播的传染病患者时;为呼吸道传染病患者进行气管切开、气管插管等近距离操作,可能发生患者血液、体液、分泌物喷溅等情况时,护目镜都发挥了重要的防护作用。因此,对于医护人员佩戴防护眼镜便成为必不可少的举措。
然而目前市场上缺少特别针对新冠病毒进行防护的护目镜。市场上现有的护目镜绝大多数是使用塑料、有机玻璃等制成且品质良莠不齐,长时间佩戴还会在镜片积累大量雾气甚至凝结成水滴,严重影响医务人员正常工作。为此,近年来医用护目镜生产企业不断研究各种防雾剂以提高镜片防雾能力,然而效果并不理想,一方面提高了该类护目镜的制作成本另一方面也存在长时间佩戴造成皮肤过敏的潜在风险。
为有效阻止新冠病毒通过眼部结膜进入人体,降低新冠病毒通过眼部传染的健康风险,更为保护广大战斗在抗“疫”一线的医护人员身体健康,所以亟需一种高效防护新冠病毒的护目镜。
发明内容
针对现有技术的不足,本发明提供一种透气性好,制造成本低的高效防护新冠病毒的护目镜。
本发明提供的高效防护新冠病毒的护目镜,其基本结构与通常的医用护目镜类似,包括镜框、树脂镜片、橡胶圈、防护布、松紧带;两个树脂镜片通过镜框卡槽嵌入镜框内;橡胶圈内侧可与人脸眼睛部为密切贴合,橡胶圈与镜框之间为防护布,并且橡胶圈与镜框之间由若干支撑条连接、支撑、固定;松紧带系于橡胶圈两侧,用于将护目镜佩戴于头部;其中:
所述防护布采用复合高效防护新冠病毒材料,由三层材料构成,由外到内依次为35-45g/m2丙纶纺粘无纺布、30-50g/m2超细旦驻极体熔喷纤维非织造布、20-30g/m2丙纶纺粘无纺布。
本发明中,所述的超细旦驻极体熔喷纤维非织造布,可由以下步骤制备得到:
(1)选取可***为原丝直径三十分之一到八十分之一的微细纤维,按照针刺毡的生产工艺和熔喷工艺进行微技术处理,具体流程为:将2-5旦尼尔的纤维经梳理,喂入,开松,混合,精开松,喂棉,均棉,粗梳,精梳,叠网,6至9道针刺工序,热定型,烧毛,压光,表面涂层或树脂化整理,检验,分切,成品微滤滤芯的工艺,最终得到纤维直径为一般滤料纤维直径三十分之一到八十分之一的微细纤维过滤材料;制得的超细纤维的纤度在0.01-0.1旦尼尔;
(2)再选择自极化效应强的电气石超细微粒作为驻极熔喷聚丙烯超细纤维非制造布的改性添加剂,通过表面修饰均匀分散到熔喷丙烯切片中,制得可纺性良好的驻极体聚丙烯母粒。电气石含量为总质量的3-8% ;
(3)采用熔喷工艺(聚合物喂入---熔融挤出---纤维形成---纤维冷却---成网---加固成布),在250±1℃的条件下,以熔融流动指数为(1000-1400)/10min(优选1200g/10min),纺制得到复合驻极体聚丙烯熔喷超细纤维非织造布;
(4)采用电晕放电对其驻极,得到含电气石聚丙烯熔喷超细纤维非织造布。具体包括:在低压空气下,对针形电极施加2000-4000伏高压电,使针尖附近形成很强的电场,产生驻极效果。为避免产生电弧放电,生产过程中采用高电流低电压的方式。同时,该含电气石驻极聚丙烯熔喷超细纤维非织造布采用沿厚度方向定向极化,可产生更高的电场并具有更好的电荷保存性,因而吸附效果也优于传统的驻极非织造布。
上述方法制备的超细纤维非织造布,其纤网表面电荷密度明显增加,驻极电荷贮存能力也有增强,过滤效率提高40%左右。其中电气石含量6%时,驻极综合效果最佳,其表面电荷密度可达-10μc/m2,对直径小于0.26μm粒,在过滤阻力为7Pa左右时,过滤效率达95.8%。以此制得超细旦驻极体熔喷纤维非织造布材料。
上述制得的超细纤维的纤度在0.01-0.1旦尼尔。超细纤维的直径非常小,只有头发丝的四十分之一左右,因此超细纤维被赋予了许多优越的性能:透气性好,对病毒小颗粒(直径60-120nm)吸附效果显著,具有极强的洁净效果等。
本发明中,所述的丙纶纺粘无纺布外层、丙纶纺粘无纺布内层上均布有透气小孔,单位面积无纺布上分布透气小孔为8-12万个/m2。
该种高效防护新冠病毒的护目镜,其高效复合防护新冠病毒材料核心材料采用微滤技术处理的超细旦驻极体熔喷纤维非织造布,表面带有常驻静电场,当新冠病毒通过微滤滤材的空隙时,将被微滤滤材产生的静电场和弱电流所捕获且具有良好的透气性。在使用100nmPSL小球模拟新冠病毒对其过滤效率检测过程中,该材料对于100nmPSL小球的平均过滤效率不小于99%,最高可达到99.2%(附图2)。如附图2所示,未经过滤前100nmPSL小球的数浓度:4588 #/cm3;经过滤后100nmPSL小球的数浓度:38 #/cm3;平均滤过效率:99.2%。符合NIOSH(美国国家职业安全卫生所)N99标准,可达到100nm评价透过率不超过每分钟100个数/立方厘米的标准。
本发明的有益效果在于:
(1)采用复合高效防护新冠病毒材料,可保证高效过滤新冠病毒的同时具有良好的透气性,避免雾气积累;
(2)采用橡胶圈贴合使用者脸部,避免产生空隙,增加密封性,树脂护目镜片可拆卸消毒,反复使用;
(3)本高效防护新冠病毒的护目镜制造成本不高,价格便宜。
附图说明
图1是高效防护新冠病毒的护目镜的结构示意图。
图2为本发明采用的复合高效防护新冠病毒材料对于100nmPSL小球(模拟病毒)的过滤效率。
图中标号:1为松紧,2为橡胶圈,3为复合高效防护新冠病毒材料,4为镜框卡槽,5为树脂镜片,6为镜框。
具体实施方式
下面通过实施例结合附图,进一步描述本发明。
本发明的高效防护新冠病毒护目镜的结构参见图1所示,包括:松紧1,橡胶圈2,复合高效防护新冠病毒材料3,镜框卡槽4,树脂镜片5,镜框6。其中,其松紧1使用者可根据头部尺寸调节大小;橡胶圈2贴合使用者脸部,避免产生空隙,增加密封性;镜框卡槽4用于固定树脂镜片5;其树脂镜片可拆卸消毒,反复使用;其镜框6有支撑条结构,并与橡胶圈连接、固定;作为防护布的复合高效防护新冠病毒材料,由三层材料构成,由外到内依次为40g/m2丙纶纺粘无纺布、50g/m2超细旦驻极体熔喷纤维非织造布(1或2层)、25g/m2丙纶纺粘无纺布。其中,中间层采用微滤技术处理的超细旦驻极体熔喷纤维非织造布,表面带有常驻静电场,当新冠病毒通过微滤滤材的空隙时,将被微滤滤材产生的静电场和弱电流所捕获且具有良好的透气性。在使用100nmPSL小球模拟新冠病毒对其过滤效率检测过程中,该材料对于100nmPSL小球的平均过滤效率不小于99%,最高可达到99.2%(附图2)。如附图2所示,未经过滤前100nmPSL小球的数浓度:4588 #/cm3;经过滤后100nmPSL小球的数浓度:38 #/cm3;平均滤过效率:99.2%。符合NIOSH(美国国家职业安全卫生所)N99标准,可达到100nm评价透过率不超过每分钟100个数/立方厘米的标准。
本发明中,所述的丙纶纺粘无纺布外层、丙纶纺粘无纺布内层上均布有透气小孔,单位面积无纺布上分布透气小孔为约为10万个/m2。
本发明设计的防护新冠病毒护目镜可以有效防止新冠病毒污染,确保医护人员的健康。
Claims (3)
1.一种防护新冠病毒的护目镜,其特征在于,包括镜框、树脂镜片、橡胶圈、防护布、松紧带;两个树脂镜片通过镜框卡槽嵌入镜框内;橡胶圈内侧可与人脸眼睛部为密切贴合,橡胶圈与镜框之间为防护布,并且橡胶圈与镜框之间由若干支撑条连接、支撑、固定;松紧带系于橡胶圈两侧,用于将护目镜佩戴于头部;其中:
所述防护布采用复合防护新冠病毒材料,由三层材料构成,由外到内依次为35-45g/m2丙纶纺粘无纺布、30-50g/m2超细旦驻极体熔喷纤维非织造布、20-30g/m2丙纶纺粘无纺布。
2.根据权利要求1所述的防护新冠病毒的护目镜,其特征在于,所述的超细旦驻极体熔喷纤维非织造布,由以下步骤制备得到:
(1)选取可***为原丝直径三十分之一到八十分之一的微细纤维,按照针刺毡的生产工艺和熔喷工艺进行微技术处理,得到纤维直径为一般滤料纤维直径三十分之一到八十分之一的微细纤维过滤材料;制得的超细纤维的纤度在0.01-0.1旦尼尔;
(2)再选择自极化效应强的电气石超细微粒作为驻极熔喷聚丙烯超细纤维非制造布的改性添加剂,通过表面修饰均匀分散到熔喷丙烯切片中,制得可纺性良好的驻极体聚丙烯母粒;电气石含量为总质量的3-8% ;
(3)采用熔喷工艺,在250±1℃的条件下,以熔融流动指数为(1000-1400)/10min,纺制得到复合驻极体聚丙烯熔喷超细纤维非织造布;
(4)采用电晕放电对其驻极,得到含电气石聚丙烯熔喷超细纤维非织造布;包括在低压空气下,对针形电极施加2000-4000伏高压电,使针尖附近形成很强的电场,产生驻极效果;同时,该含电气石驻极聚丙烯熔喷超细纤维非织造布采用沿厚度方向定向极化,以产生更高的电场并具有更好的电荷保存性,因而有更好的吸附效果。
3.根据权利要求1所述的防护新冠病毒的护目镜,其特征在于,所述的丙纶纺粘无纺布上均布有透气小孔,单位面积无纺布上分布透气小孔为8-12万个/m2。
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