CN112726225A - 高效过滤熔喷布 - Google Patents
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Abstract
本发明公开一种高效过滤熔喷布,涉及口罩生产用材料技术领域。它包括原料称取、混合、熔融;熔体过滤;计量;熔体均化、挤出;熔体热风牵伸、冷风冷却吹断;成网;驻极;切边、卷绕;且在驻极工艺步骤进行前,先在成网工艺步骤后得到的非织造布层表层包覆涂层;所述涂层使用的涂料由以下重量份的原料制成:水性聚氨酯预聚体50份~100份、电气石5份~10份、聚乙二醇0.5份~1份、壳聚糖0.5份~1份、相容剂0份~5份、抗氧化剂0.2份~0.5份、水20份~50份。本发明在驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆一种具有静电效应的涂层,利用后续的驻极工艺,使非织造布层表层带上静电作用,从而提高熔喷布的过滤性的问题。
Description
技术领域
本发明涉及口罩生产用材料技术领域,尤其是一种熔喷布。
背景技术
熔喷布是口罩生产最核心的材料,以聚丙烯为主要生产原料,纤维直径可以达到1~5微米。因其空隙多、结构蓬松、抗褶皱能力好,具有独特的毛细结构的超细纤维增加单位面积纤维的数量和表面积,从而使熔喷布具有很好的过滤性、屏蔽性、绝热性和吸油性等,被广泛应用于空气、液体过滤材料、隔离材料、吸纳材料、医用和工业用口罩材料、保暖材料、吸油材料及擦拭布等领域。
然而,随着科技的不断进步,人们生活水平的不断提高,对熔喷布的性能也在不断提高,尤其是其过滤性能。
发明内容
本发明提供了一种高效过滤熔喷布,该熔喷布具有优异的过滤性能,从而满足人们对熔喷布过滤性能的需求。
为了解决上述技术问题,本发明所采用的技术方案是:
其生产工艺包括:①原料称取;②原料混合、熔融;③熔体过滤;④计量;⑤熔体均化、挤出;⑥熔体热风牵伸、冷风冷却吹断;⑦成网;⑧驻极;⑨切边、卷绕;
其中,所述驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆涂层;其中所述涂层使用的涂料由以下重量份的原料制成:水性聚氨酯预聚体50份~100份、电气石5份~10份、聚乙二醇0.5份~1份、壳聚糖0.5份~1份、相容剂0份~5份、抗氧化剂0.2份~0.5份、水20份~50份。
上述技术方案中,更具体的技术方案还可以是:所述电气石的平均粒径为0.01μm~0.05μm。
进一步的,所述水性聚氨酯预聚体是由低聚二醇、二异氰酸酯按照重量比为1:2.5的比例通过聚合而成的。
进一步的,所述抗氧化剂由阻酚抗氧剂与亚磷酸酯类抗氧剂按质量比为3:1的比例进行复配制得。
进一步的,所述涂料的制备方法包括以下步骤:
按上述原料之间的比例,先将原料中的水、电气石、聚乙二醇、壳聚糖、相容剂投入到反应釜中,加热使该反应釜中的物料升温至65℃~100℃,并在该温度恒定的条件下,开动搅拌机在800转/分~1000转/分的搅拌速度下搅拌15分钟以上,然后进行轧浆;轧浆结束后,在1000转/分~1200转/分的搅拌速度下加入水性聚氨酯预聚体和抗氧化剂,继续搅拌10分钟以上。
由于采用上述技术方案,本发明与现有技术相比,具有如下有益效果:
1.本发明通过驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆一种具有静电效应的涂层,利用后续的驻极工艺,使非织造布层表层带上静电作用,从而提高熔喷布的过滤性的问题。
2.本发明通过以电气石为主要成分,并将该电气石平均粒径限定在0.01μm~0.05μm的极小范围内,以及通过加入聚乙二醇使得电气石能均匀的加载在聚丙烯树脂载体上,加入壳聚糖防止电气石之间发生团聚黏结,提高涂料涂层的静电效应。
具体实施方式
以下结合实例,对本发明作进一步详述;
实施例1
包括以下步骤:
其生产工艺包括:①原料称取(按重量份计):聚丙烯树脂100份、抗氧化剂1份、稳定剂1份、分散剂5份;②原料混合、熔融:所述加热熔化过程中,所述模头温度为160℃~220℃;③熔体过滤:所述过滤器的孔径为5μm,在过滤过程中,熔化物料的温度维持在220℃;④计量;⑤熔体均化、挤出:均化过程中,物料的温度维持在220℃;⑥熔体热风牵伸、冷风冷却吹断:在喷丝过程中,所述均化物料的温度维持在220℃、所述热风的温度为280℃;⑦成网;⑧驻极:在炭驻极过程中,驻极电压为20kv,驻极时间为1min;⑨切边、卷绕;
其中,所述驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆涂层;其中所述涂层使用的涂料由以下重量份的原料制成:水性聚氨酯预聚体50份、电气石6份、聚乙二醇0.7份、壳聚糖0.8份、相容剂0份、抗氧化剂0.2份、水20份;
其中,上述提及的电气石的平均粒径为0.05μm;
水性聚氨酯预聚体是由低聚二醇、二异氰酸酯按照重量比为1:2.5的比例通过聚合而成的;
抗氧化剂由阻酚抗氧剂与亚磷酸酯类抗氧剂按质量比为3:1的比例进行复配制得;
所述涂料的制备方法包括以下步骤:
按上述原料之间的比例,先将原料中的水、电气石、聚乙二醇、壳聚糖、相容剂投入到反应釜中,加热使该反应釜中的物料升温至65℃,并在该温度恒定的条件下,开动搅拌机在800转/分的搅拌速度下搅拌25分钟,然后进行轧浆;轧浆结束后,在1000转/分的搅拌速度下加入水性聚氨酯预聚体和抗氧化剂,继续搅拌20分钟。
实施例2
包括以下步骤:
其生产工艺包括:①原料称取(按重量份计):聚丙烯树脂100份、抗氧化剂1份、稳定剂1份、分散剂5份;②原料混合、熔融:所述加热熔化过程中,所述模头温度为160℃~220℃;③熔体过滤:所述过滤器的孔径为5μm,在过滤过程中,熔化物料的温度维持在220℃;④计量;⑤熔体均化、挤出:均化过程中,物料的温度维持在210℃;⑥熔体热风牵伸、冷风冷却吹断:在喷丝过程中,所述均化物料的温度维持在220℃、所述热风的温度为280℃;⑦成网;⑧驻极:在炭驻极过程中,驻极电压为20kv,驻极时间为1min;⑨切边、卷绕;
其中,所述驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆涂层;其中所述涂层使用的涂料由以下重量份的原料制成:水性聚氨酯预聚体100份、电气石9份、聚乙二醇0.8份、壳聚糖0.5份、相容剂3份、抗氧化剂0.5份、水40份;
其中,上述提及的电气石的平均粒径为0.03μm;
水性聚氨酯预聚体是由低聚二醇、二异氰酸酯按照重量比为1:2.5的比例通过聚合而成的;
抗氧化剂由阻酚抗氧剂与亚磷酸酯类抗氧剂按质量比为3:1的比例进行复配制得;
所述涂料的制备方法包括以下步骤:
按上述原料之间的比例,先将原料中的水、电气石、聚乙二醇、壳聚糖、相容剂投入到反应釜中,加热使该反应釜中的物料升温至80℃,并在该温度恒定的条件下,开动搅拌机在900转/分的搅拌速度下搅拌25分钟,然后进行轧浆;轧浆结束后,在1100转/分的搅拌速度下加入水性聚氨酯预聚体和抗氧化剂,继续搅拌15分钟。
实施例3
包括以下步骤:
其生产工艺包括:①原料称取(按重量份计):聚丙烯树脂100份、抗氧化剂1份、稳定剂1份、分散剂5份;②原料混合、熔融:所述加热熔化过程中,所述模头温度为160℃~220℃;③熔体过滤:所述过滤器的孔径为5μm,在过滤过程中,熔化物料的温度维持在220℃;④计量;⑤熔体均化、挤出:均化过程中,物料的温度维持在220℃;⑥熔体热风牵伸、冷风冷却吹断:在喷丝过程中,所述均化物料的温度维持在220℃、所述热风的温度为280℃;⑦成网;⑧驻极:在炭驻极过程中,驻极电压为20kv,驻极时间为1min;⑨切边、卷绕;
其中,所述驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆涂层;其中所述涂层使用的涂料由以下重量份的原料制成:水性聚氨酯预聚体80份、电气石10份、聚乙二醇1份、壳聚糖1份、相容剂5份、抗氧化剂0.5份、水50份;
其中,上述提及的电气石的平均粒径为0.01μm;
水性聚氨酯预聚体是由低聚二醇、二异氰酸酯按照重量比为1:2.5的比例通过聚合而成的;
抗氧化剂由阻酚抗氧剂与亚磷酸酯类抗氧剂按质量比为3:1的比例进行复配制得;
所述涂料的制备方法包括以下步骤:
按上述原料之间的比例,先将原料中的水、电气石、聚乙二醇、壳聚糖、相容剂投入到反应釜中,加热使该反应釜中的物料升温至100℃,并在该温度恒定的条件下,开动搅拌机在1000转/分的搅拌速度下搅拌30分钟,然后进行轧浆;轧浆结束后,在1200转/分的搅拌速度下加入水性聚氨酯预聚体和抗氧化剂,继续搅拌20分钟。
性能检测:
其中,透气量根据GB /T 5453-199标准进行测试,测试气流压力为200Pa;气流阻力根据GB 2626-2006标准测试,风速为5.33cm/s;过滤效率根据GB 2626-2006标准测试,测试颗粒为0.3μm,风速为5.33cm/s。
测试结果如表1所示。
表1
Claims (5)
1.一种高效过滤熔喷布,其生产工艺包括:①原料称取;②原料混合、熔融;③熔体过滤;④计量;⑤熔体均化、挤出;⑥熔体热风牵伸、冷风冷却吹断;⑦成网;⑧驻极;⑨切边、卷绕; 其特征在于还包括:所述驻极工艺步骤进行前,先在所述成网工艺步骤后得到的非织造布层表层包覆涂层;其中所述涂层使用的涂料由以下重量份的原料制成:水性聚氨酯预聚体50份~100份、电气石5份~10份、聚乙二醇0.5份~1份、壳聚糖0.5份~1份、相容剂0份~5份、抗氧化剂0.2份~0.5份、水20份~50份。
2.根据权利要求1所述的高效过滤熔喷布,其特征在于:所述电气石的平均粒径为0.01μm~0.05μm。
3.根据权利要求1或2所述的高效过滤熔喷布,其特征在于:所述水性聚氨酯预聚体是由低聚二醇、二异氰酸酯按照重量比为1:2.5的比例通过聚合而成的。
4.根据权利要求2所述的高效过滤熔喷布,其特征在于:所述抗氧化剂由阻酚抗氧剂与亚磷酸酯类抗氧剂按质量比为3:1的比例进行复配制得。
5.根据权利要求4所述的高效过滤熔喷布,其特征在于:所述涂料的制备方法包括以下步骤:
按上述原料之间的比例,先将原料中的水、电气石、聚乙二醇、壳聚糖、相容剂投入到反应釜中,加热使该反应釜中的物料升温至65℃~100℃,并在该温度恒定的条件下,开动搅拌机在800转/分~1000转/分的搅拌速度下搅拌15分钟以上,然后进行轧浆;轧浆结束后,在1000转/分~1200转/分的搅拌速度下加入水性聚氨酯预聚体和抗氧化剂,继续搅拌10分钟以上。
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