CN114107909A - 一种镀银无纺布的制备装置及方法 - Google Patents
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Abstract
本发明涉及一种镀银无纺布的制备装置及方法。所述制备装置包括内部真空室,所述内部真空室内设有用于银原子蒸发的蒸发器,所述内部真空室上开设有银原子蒸汽喷口,所述内部真空室外还设有大径冷媒辊、大径放卷轴和收卷轴,所述大径放卷轴与收卷轴位于所述大径冷媒辊的两侧,并且所述大径放卷轴和所述收卷轴的高度高于所述大径冷媒辊的高度,所述大径冷媒辊位于所述真空室的银原子蒸汽喷口处。通过本发明的镀银无纺布的制备装置和方法能够将银原子牢固、均匀的镀到无纺布上。
Description
技术领域
本发明涉及一种镀银无纺布的制备装置及方法,属于无纺布镀银技术领域。
背景技术
无纺布是以聚丙烯树脂为主要生产原料,是一种不需要纺纱织布而形成的织物,只是将纺织短纤维或者长丝进行定向或随机排列形成的纤网结构,具有防潮、透气、柔韧、质轻、不助燃、易分解、价格低廉、无毒无刺激性等特点,可用于医疗卫生、工业、包装、汽车工业、建材、家具等多种领域。
银离子具有极强的杀菌防腐作用,能够杀死几乎所有微生物,极低浓度即有抑菌作用,银离子能够通过吸附细菌体的蛋白酶,并迅速与其结合在一起,破坏细菌的蛋白酶,使其丧失活性,导致细菌死亡。另外,当细菌被银离子杀死后,银离子从细菌尸体中游离出来,再与其他菌落接触,周而复始地进行上述过程,这样是银杀菌持久性的原因。
目前,市场上虽然有一些制备镀银无纺布产品的方法及设备,但主要是通过浸渍的方式将低浓度的银离子溶液浸渍在无纺布上,目前浸渍方法有两种,一种是将无纺布浸渍在一定浓度的银离子溶液中,待银离子吸附在无纺布上后取出,甩干、烘干后,即得载银无纺布,此方法缺点是:1)无纺布上银离子浓度无法确定;2)银离子与无纺布结合力不好,容易脱落,无法保证较好的抗菌、抗病毒效果;另一种是将无纺布浸渍在含银离子和有机还原剂的混合溶液中,银离子在还原剂的作用下,在无纺布上还原析出为银原子,继而进行富集,烘干后即得镀银无纺布。此方法的缺点:1)无纺布上银浓度无法确定;2)有机还原剂存在分散性不好的问题,故无纺布上的镀银层也有分散不均匀的问题;3)有机还原剂和银离子会吸附在无纺布上,会产生脱落问题,此镀层也无法保证较好的抗菌、抗病毒效果。
申请号为CN201821879842.9的中国专利公开了一种对纤维进行镀银的镀银装置,为了增加银离子的附着力,其主要是通过将纤维丝穿过一定浓度的加压银溶液的方式进行镀银,待银离子吸附在纤维丝上后进行烘干和收卷,即可得到镀银纤维丝,此镀银方式存在银镀层的厚度无法控制并且镀银效率低的缺点,虽然针对纤维丝进行镀银,而非织物,从源头上镀银,最后所获得的银纤维织物的银离子附着量更多,但是在后续防止过程中容易将纤维丝上的银镀层摩擦掉。
发明内容
本发明的目的在于提供一种新的技术方案以改善或解决如上所述的现有技术中存在的技术问题。
本发明提供了一种镀银无纺布的制备装置,包括内部真空室,所述内部真空室内设有用于银原子蒸发的蒸发器,所述内部真空室上开设有银原子蒸汽喷口,所述内部真空室外还设有大径冷媒辊、大径放卷轴和收卷轴,所述大径放卷轴与收卷轴位于所述大径冷媒辊的两侧,并且所述大径放卷轴和所述收卷轴的高度高于所述大径冷媒辊的高度,所述大径冷媒辊位于所述真空室的银原子蒸汽喷口处。
进一步的,还包括外部真空室,所述内部真空室、大径冷媒辊、大径放卷轴和收卷轴均设置在所述外部真空室内,所述外部真空室的真空度小于内部真空室的真空度。
进一步的,所述蒸发器包括用于放置纯银的蒸发源容器以及用于为所述蒸发源容器加热的加热器,所述蒸发源容器内设有若干容纳腔。
进一步的,所述大径冷媒辊到所述收卷轴之间还设有若干小径冷媒辊,若干所述小径冷媒辊沿所述无纺布的输出方向以高度逐渐升高排布。
进一步的,所述大径放卷轴与所述大径冷媒辊之间还设有若干小径放卷轴,若干所述小径放卷轴沿所述无纺布的输出方向以高度逐渐降低排布。
进一步的,所述大径放卷轴、大径冷媒辊和收卷轴均通过收放驱动装置带动其转动,并且所述大径放卷轴、大径冷媒辊和收卷轴的收放速度能够通过所述收放驱动装置控制。
进一步的,所述内部真空室和外部真空室分别与第一真空泵和第二真空泵连接。
进一步的,所述大径冷媒辊和小径冷媒辊内部的冷却介质为液氮、液氨、干冰或乙二醇。
本发明还公开了一种镀银无纺布的制备方法,使用如上所述的镀银无纺布的制备装置,该方法包括如下步骤:
1)、准备成卷的无纺布,将无纺布安装到所述大径放卷轴上,并将无纺布绕过所述大径冷媒辊后连接到收卷轴上,同时将纯度大于99.995%,颗粒直径为大于0.5mm小于10mm的纯银颗粒放入蒸发源容器内;
2)、打开所述第一真空泵和第二真空泵,对所述外部真空室和内部真空室开启抽真空作业,使所述内部真空室的真空度保持在1.0×10-2Pa至1.0×10-4Pa范围内;
3)、启动所述加热器,使所述加热器对所述蒸发源容器内的银颗粒加热,银颗粒在蒸发源容器内受热产生银原子蒸汽;
4)、启动收放驱动装置,所述无纺布在所述大径放卷轴与所述收卷轴之间移动,通过调整收卷轴和大径放卷轴的车速来控制银镀层的厚度,所述银原子蒸汽蒸镀到经过银原子蒸汽喷口处的无纺布上,经过所述大径冷媒辊的冷却和降温作用使银原子蒸汽沉降在所述无纺布的表面。
进一步的,通过臭氧对镀有银原子层的无纺布进行氧化处理后,银原子被氧化成具有极强杀菌作用的银离子。
进一步的,所述大径冷媒辊的温度为-50℃至-10℃。
本发明的有益效果是:
1、通过本发明的镀银无纺布的制备装置和方法能够将银原子牢固、均匀的镀到无纺布上,并且通过调节所述无纺布在所述大径放卷轴与所述收卷轴之间的移动速度,进而控制银原子镀层的厚度,相对于无纺布的浸渍镀银工艺来说,此工艺解决了浸渍镀银不均匀的问题,可得到厚度均匀的镀银无纺布,此镀银无纺布银原子与无纺布结合牢固,因此具有极强的抗菌、抗病毒功效,且有良好的透气性和过滤性,能满足多种抗菌产品的需求;
2、由于所述镀银无纺布的制备装置体积较大且要求的真空度较高,为了保证内部真空室的高真空度,在所述内部真空室外增加外部真空室,通过双真空室的组合来保证内部真空室的高真空度;
3、本发明的所述大径冷媒辊到所述收卷轴之间还设有若干小径冷媒辊,所述小径冷媒辊对从所述大径冷媒辊上传送过来的无纺布进一步的降温,使银原子牢固的粘附在无纺布上;
4、所述蒸发源容器内设有若干可以放置纯银颗粒的容纳腔,通过多个容纳腔的设置,能够保证银颗粒在蒸发源容器内受热均匀,提高蒸发效率和蒸镀效果。
附图说明
图1为本发明的结构示意图;
图中,1、内部真空室;2、蒸发源容器;3、加热器;401、大径冷媒辊;402、小径冷媒辊;501、大径放卷轴;502、小径放卷轴;6、收卷轴;701、第一真空泵;702、第二真空泵;8、外部真空室。
具体实施方式
以下结合实例对本发明的原理和特征进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
如图1所示,一种镀银无纺布的制备装置,包括内部真空室1,所述内部真空室1内设有用于银原子蒸发的蒸发器,所述内部真空室1上开设有银原子蒸汽喷口,所述内部真空室1外还设有大径冷媒辊401、大径放卷轴501和收卷轴6,所述大径放卷轴501与收卷轴6位于所述大径冷媒辊401的两侧,并且所述大径放卷轴501和所述收卷轴6的高度高于所述大径冷媒辊401的高度,所述大径冷媒辊401位于所述真空室的银原子蒸汽喷口处。
所述镀银无纺布的制备装置还包括外部真空室8,所述内部真空室1、大径冷媒辊401、大径放卷轴501和收卷轴6均设置在所述外部真空室8内,所述外部真空室8的真空度小于内部真空室1的真空度,所述内部真空室1与第一真空泵701连接,所述外部真空室8和第二真空泵702连接。
所述蒸发器包括用于放置纯银的蒸发源容器2以及用于为所述蒸发源容器2加热的加热器3,所述加热器3的加热温度范围为800℃-2000℃,所述蒸发源容器2内设有若干可以放置纯银颗粒的容纳腔,通过多个容纳腔的设置,能够保证银颗粒在蒸发源容器2内受热均匀,提高蒸发效率和蒸镀效果。
所述大径冷媒辊401到所述收卷轴6之间还设有若干小径冷媒辊402,若干所述小径冷媒辊402沿所述无纺布的输出方向以高度逐渐升高排布。所述大径冷媒辊401和小径冷媒辊402内部的冷却介质为液氮、液氨、干冰和乙二醇中的任意一种,所述大径冷媒辊401的温度为-50℃至-10℃。另外,所述大径放卷轴501与所述大径冷媒辊401之间还设有若干小径放卷轴502,若干所述小径放卷轴502沿所述无纺布的输出方向以高度逐渐降低排布。所述大径放卷轴501、大径冷媒辊401和收卷轴6均通过收放驱动装置带动其转动,并且所述大径放卷轴501、大径冷媒辊401和收卷轴6的收放速度能够通过所述收放驱动装置控制。
使用所述的镀银无纺布的制备装置制备镀银无纺布的方法包括如下步骤:
1)准备成卷的无纺布,将无纺布安装到所述大径放卷轴501上,并将无纺布依次绕过所述小径放卷轴502、大径冷媒辊401、小径冷媒辊402后连接到收卷轴6上,所述无纺布紧贴在所述大径冷媒辊401上,所述收卷轴6用于收起镀银后的无纺布,将纯度大于99.995%,颗粒直径为大于0.5mm小于10mm的纯银颗粒放入蒸发源容器2内;
2)打开所述第一真空泵701和第二真空泵702,对所述外部真空室8和内部真空室1开启抽真空作业,使所述内部真空室1的真空度保持在1.0×10-2Pa-1.0×10-4Pa范围内;
3)启动所述加热器3,使所述加热器3对所述蒸发源容器2内的银颗粒加热,待蒸发容器内的温度升至设定温度后,产生银原子蒸汽;
4)启动收放驱动装置,所述无纺布在所述大径放卷轴501与所述收卷轴6之间移动,通过调整收卷轴6和大径放卷轴501的车速来控制银镀层的厚度,所述银原子蒸汽蒸遇到包覆大径冷媒辊401的无纺布,沉降在无纺布表面,经过所述大径冷媒辊401的冷却和降温作用使银原子蒸汽沉降在所述无纺布的表面。
当需要将无纺布制作成防护用品时,如口罩,在制作前通过臭氧对镀有银原子层的无纺布进行氧化处理,银原子被氧化成具有极强杀菌作用的银离子,从而使无纺布具有了的极强杀菌作用的银离子。
所述收卷轴6和大径放卷轴501的车速越快,无纺布上银镀层的厚度越薄,所述收卷轴6和大径放卷轴501的车速越慢,无纺布上银镀层的厚度越厚,例如,当无纺布在所述大径放卷轴501与所述收卷轴6之间移动速度为500m/min时,制备出的无纺布的银镀层的厚度约为10纳米,当无纺布在所述大径放卷轴501与所述收卷轴6之间移动速度为1500m/min时,制备出的无纺布的银镀层的厚度约为1纳米。因此可以通过调整收卷轴6和放卷轴的车速来获得不同银镀层厚度的无纺布。
本发明结构简单,能够通过调整卷轴的车速来控制银镀层的厚度,相对于无纺布的化学镀银工艺来说,此工艺解决了化学镀银不均匀的问题,可得到厚度均匀的镀银无纺布,此镀银无纺布具有极强的抗菌、抗病毒功效,且有良好的透气性和过滤性,能满足多种抗菌产品的需求。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种镀银无纺布的制备装置,包括内部真空室,其特征在于,所述内部真空室(1)内设有用于银原子蒸发的蒸发器,所述内部真空室(1)上开设有银原子蒸汽喷口,所述内部真空室(1)外还设有大径冷媒辊(401)、大径放卷轴(501)和收卷轴(6),所述大径放卷轴(501)与收卷轴(6)位于所述大径冷媒辊(401)的两侧,并且所述大径放卷轴(501)和所述收卷轴(6)的高度高于所述大径冷媒辊(401)的高度,所述大径冷媒辊(401)位于所述真空室的银原子蒸汽喷口处。
2.根据权利要求1所述的镀银无纺布的制备装置,其特征在于,还包括外部真空室(8),所述内部真空室(1)、大径冷媒辊(401)、大径放卷轴(501)和收卷轴(6)均设置在所述外部真空室(8)内,所述外部真空室(8)的真空度小于内部真空室(1)的真空度。
3.根据权利要求1所述的镀银无纺布的制备装置,其特征在于,所述蒸发器包括用于放置纯银的蒸发源容器(2)以及用于为所述蒸发源容器(2)加热的加热器(3),所述蒸发源容器(2)内设有若干容纳腔。
4.根据权利要求1所述的镀银无纺布的制备装置,其特征在于,所述大径冷媒辊(401)到所述收卷轴(6)之间还设有若干小径冷媒辊(402),若干所述小径冷媒辊(402)沿所述无纺布的输出方向以高度逐渐升高排布。
5.根据权利要求1所述的镀银无纺布的制备装置,其特征在于,所述大径放卷轴(501)与所述大径冷媒辊(401)之间还设有若干小径放卷轴(502),若干所述小径放卷轴(502)沿所述无纺布的输出方向以高度逐渐降低排布。
6.根据权利要求1所述的镀银无纺布的制备装置,其特征在于,所述大径放卷轴(501)、大径冷媒辊(401)和收卷轴(6)均通过收放驱动装置带动其转动,并且所述大径放卷轴(501)、大径冷媒辊(401)和收卷轴(6)的收放速度能够通过所述收放驱动装置控制。
7.根据权利要求3所述的镀银无纺布的制备装置,其特征在于,所述内部真空室和外部真空室分别与第一真空泵(701)和第二真空泵(702)连接。
8.根据权利要求5所述的镀银无纺布的制备装置,其特征在于,所述大径冷媒辊(401)和小径冷媒辊(402)内部的冷却介质为液氮、液氨、干冰或乙二醇。
9.一种镀银无纺布的制备方法,使用如权利要求1至7中任意一项所述的镀银无纺布的制备装置进行,其特征在于,该制备方法包括如下步骤:
1)准备成卷的无纺布,将无纺布安装到所述大径放卷轴(501)上,并将无纺布绕过所述大径冷媒辊(401)后连接到收卷轴(6)上,同时将纯度大于99.995%,颗粒直径为大于0.5mm小于10mm的纯银颗粒放入蒸发源容器(2)内;
2)打开所述第一真空泵(701)和第二真空泵(702),对所述外部真空室和内部真空室开启抽真空作业,使所述内部真空室的真空度保持在1.0×10-2-1.0×10-4Pa范围内;
3)启动所述加热器(3),使所述加热器(3)对所述蒸发源容器(2)内的银颗粒加热,银颗粒在蒸发源容器(2)内受热产生银原子蒸汽;
4)启动收放驱动装置,所述无纺布在所述大径放卷轴(501)与所述收卷轴(6)之间移动,通过调整收卷轴(6)和大径放卷轴(501)的车速来控制银镀层的厚度,所述银原子蒸汽蒸镀到经过银原子蒸汽喷口处的无纺布上,经过所述大径冷媒辊(401)的冷却和降温作用使银原子蒸汽沉降在所述无纺布的表面。
10.根据权利要求9所述的镀银无纺布的制备方法,其特征在于,所述大径冷媒辊(401)的温度为-50℃至-10℃。
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