CN105833610B - 一种提高表面容尘的复合滤纸制造方法及装置 - Google Patents
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Abstract
本发明公开了一种提高表面容尘的复合滤纸制造方法及装置。该装置主要包括高压电场发生器、贮液槽、拉丝滚筒电极、收集电极板、基底织物卷筒、烘箱等。操作方法为:将纤维溶解在溶剂中形成超细纤维溶液,通过高压电场发生器在拉丝滚筒电极和收集电极板之间形成高压静电场,纤维溶液在强电场的作用下,呈丝状粘附到基底织物上,将超细纤维面层和基底织物复合,经过烘箱,超细纤维溶液溶剂挥发,得到复合滤纸。本发明中所涉及复合滤纸,过滤效率高,能够大大提高滤纸表面容尘量,提高滤纸的使用寿命,制造方法具备设计合理,生产效率高,工艺简单,复合层纤维直径和厚度均匀等优点。
Description
技术领域
本发明属于空气过滤滤纸制造领域,具体涉及一种提高表面容尘的复合滤纸制造方法及装置。
背景技术
随着人们生活水平的不断提高,与生活息息相关的空气质量收到越来越多的重视。尤其是对空气环境中悬浮微粒的控制,无论在净化粒子数量还是大小方面都提出了更高的要求。这就对空气净化行业提出了更高的要求,必须开发研制具有高性能的空气过滤材料和装置。不同的纤维过滤材料有着各自的优缺点。玻璃纤维滤材具有耐温性好、伸长率低、强度高、耐腐蚀性好等特点,同时因纤维表面光滑、直径细、过滤阻力小,因而过滤效率高。但玻璃纤维耐折性和耐磨性差,在使用过程中因频繁清灰而容易磨损、折断,影响使用寿命。传统的非织造过滤材料具有耐折、耐磨性好阻力低等优点,但有强度低、伸长率大、不耐高温等缺点。静电纺丝纳米纤维直径小,具有很大的比表面积,有很强的吸附力以及良好的过滤性能。然而,由于纳米纤维强力低,尚不能单独形成过滤材料。
将静电纺丝纤维毡与普通非织造过滤材料复合可以提高过滤效率。中国专利CN202968789 U中公开了一种静电纺丝装置。所述静电纺丝装置包括一个多通道推拉式注射泵和多头喷丝装置:所述多通道推拉式定量注射泵能够配备两个或两个以上不同规格的注射器;定量注射泵通过注射泵推杆控制注射器中聚合物的抽取液量、抽取速度、灌注液量、灌注速度;多头喷丝装置包括两个或两个以上纺丝针头和高压电源正极直接相连,该实用新型专利可显著提高聚合物的纺丝速度,在纺丝时可以自动控制聚合物溶液的供给,节约时间,提高生产效率。然而,专利中提出的静电纺丝技术采用针头喷丝的工艺方法,结构复杂,纺丝不稳定,难以实现产业化生产。
发明内容
本发明针对现有国内市场上复合滤纸生产工艺或者装置存在的局限性问题,提出一种提高表面容尘的复合滤纸制造方法及装置,该复合滤纸过滤效率高,能够大大提高滤纸表面容尘量,延长滤纸的使用寿命,制造方法具备设计合理,生产效率高,工艺简单,复合纤维层直径厚度均匀等优点。
本发明为达到以上技术要求,所采取的技术方案是:
本发明提出的提高表面容尘的复合滤纸制造方法,具体步骤如下:
(1)选择基底织物;将超细纤维溶解于有机溶剂中,配制成超细纤维溶液;
(2)设收集电极板长度为L,拉丝滚筒电极的直径为D3,控制D3/L为0.5~1,将拉丝滚筒电极3一部分浸没在超细纤维溶液中,浸没部分为0.1~0.5D3,拉丝滚筒电极3和收集电极板4为导电性良好,电导率在10Ω·cm以上;
(3)将步骤(1)所述基底织物穿过收集电极板4和拉丝滚筒电极3之间,控制收集电极板4和拉丝滚筒电极轴的距离为5-50cm,在高压电场发生器1的作用下,拉丝滚筒电极3和收集电极板4之间形成高压静电场,使被拉丝滚筒电极带起的超细纤维溶液粘附到基底织物上,经过烘箱6,有机溶剂得以挥发,最终得到具有均匀且致密的超细纤维层的复合滤纸;高压电场发生器输出电压1~50kv。
本发明中,所述基层织物采用丙纶(PP)、涤纶(PET)、锦纶(PA)、粘胶纤维、腈纶、乙纶(HDPE)或氯纶(PVC)等材料制成的无纺布中任一种,无纺布纤维直径D1≥5μm。
本发明中,步骤(1)中所述有机溶剂采用以常态下呈液态的易挥发有机物为溶剂,如乙醇、丙酮、***或氯仿等中任一种,超细纤维采用玻璃纤维、涤纶、尼龙或纤维素纤维等中任一种,超细纤维为溶质,制得超细纤维溶液,超细纤维直径D2≤1μm,质量浓度为2~8%。
本发明提出的提高表面容尘的复合滤纸制造方法使用的装置,该装置包含高压电场发生器1、贮液槽2、拉丝滚筒电极3、收集电极板4、基底织物卷筒5和烘箱6,拉丝滚筒电极3部分位于贮液槽2内,浸没于放置于贮液槽2中的超细纤维溶液中,拉丝滚筒电极3上方是收集电极板,高压电场发生器1分别连接拉丝滚筒电极3和收集电极板4,使拉丝滚筒电极3和收集电极板4之间形成高压静电场,基底织物通过基底织物卷筒5的转动,在拉丝滚筒电极3和收集电极板4之间移动,超细纤维溶液在高压静电场的作用下,呈丝状粘附于基底织物上,经过烘箱,超细纤维溶液溶剂挥发,形成纳米纤维,将超细纤维面层和基底织物复合,得到复合滤纸。
本发明中,所述拉丝滚筒电极3由几个圆柱绕滚筒轴均匀固定,小圆柱的个数可以依实际应用时需求而定。
本发明所述的一种提高表面容尘的复合滤纸制造方法及装置,现有的过滤材料以及其制造工艺相比,其优势在于:
(1)本发明中涉及的一种提高表面容尘的复合滤纸制造方法及装置,其采用普通非织造过滤材料和超细纤维复合而成,表现出过滤精度高、阻力低、纳污容量大、使用寿命长等优点。
(2)本发明中涉及的一种提高表面容尘的复合滤纸制造方法及装置,该装置在拉丝滚筒电极3和收集电极板4之间形成高压静电场,使得被拉丝滚筒电极3带起的纤维溶液呈丝状粘附到普通非织造过滤材料上,经过烘箱6,有机溶剂得以挥发,形成均匀而致密的超细纤维层,结合紧密,不易脱落。
(3)本发明中涉及的一种提高表面容尘的复合滤纸制造方法及装置,拉丝滚筒电极3中的导电小圆柱沿滚筒转动轴排列,具备以下特点:可以依据实际要求,采用不同的小圆柱直径和根数,达到控制生产速度和生产质量的平衡;拉丝滚筒电极3可以依据实际非织造布的宽度进行调整,简单易行;相较于现在普遍采用的针头状纺丝电极,本发明涉及的拉丝滚筒电极装置结构简单,制作方便,可以有效降低生产成本。
(4)本发明中涉及的一种提高表面容尘的复合滤纸制造方法及装置,以常态下呈液态的易挥发有机物为溶剂,如乙醇、丙酮、***、氯仿等,采用涤纶、尼龙和纤维素纤维等超细纤维为溶质,制得超细纤维溶液。采用易挥发的有机溶剂,使得超细纤维溶液质量稳定,在后续的生产中,容易挥发,使生产工艺简单可行。同时质量分数为2~8%的超细纤维溶液,使得最终纺丝的密度、厚度以及均匀性有着具备良好的可控制性。
附图说明
图1 复合滤纸生产装置整体示意图;
图2 纺丝过程剖面示意图;
图3 拉丝滚筒电极立体示意图;
图中标号:1为高压电场发生器、2为贮液槽、3为拉丝滚筒电极、4为收集电极板、5为基底织物卷筒、6为烘箱。
具体实施方式
以下结合附图和发明人依本发明的技术方案所完成的具体实例,对本发明作进一步的详细描述。
实施例1
(1)以平均直径为29.5µm,平均孔径为37.2µm的丙纶无纺布作为基底织物;将玻璃纤维切片溶解在丙酮中,配制成浓度6%的超细纤维溶液;
(2)收集电极板4的长度为80cm,拉丝滚筒电极3的直径为D3=50cm,有8个圆柱绕滚筒轴均匀固定。高压电场发生器1的输出电压35kv,收集电极板4和拉丝滚筒电极轴的距离为20cm。拉丝滚筒电极3一部分浸没在超细纤维溶液中,浸没部分为0.3D3。
(3)在拉丝滚筒电极3和收集电极板4之间形成高压静电场作用下,使被拉丝滚筒电极带起的丝状纤维溶液粘附到基底织物上,经过烘箱6,有机溶剂丙酮得以挥发,最终得到具有均匀且致密的超细纤维层的复合滤纸1。
实施例2
(1)以平均直径为19.5µm,平均孔径为17.2µm的涤纶(PET)无纺布作为基底织物;将纤维素纤维切片溶解在氯仿中,配制成浓度7%的超细纤维溶液;
(2)收集电极板4的长度为70cm,拉丝滚筒电极3的直径为D3=40cm,有6个圆柱绕滚筒轴均匀固定。高压电场发生器1的输出电压40kv,收集电极板4和拉丝滚筒电极轴的距离为15cm。拉丝滚筒电极3一部分浸没在超细纤维溶液中,浸没部分为0.2D3。
(3)在拉丝滚筒电极3和收集电极板4之间形成高压静电场作用下,使被拉丝滚筒电极带起的丝状纤维溶液粘附到基底织物上,经过烘箱6,有机溶剂氯仿得以挥发,最终得到具有均匀且致密的超细纤维层的复合滤纸2。
通过过滤材料测试台,将普通滤纸和上述两种复合滤纸的过滤效率进行测试,并将它们应用在实际生活中,比较它们的相关参数(容尘量和使用寿命),得到下表。如表1所示,复合滤纸的过滤效果明显比普通滤纸高出15%以上,实际生活中,容尘量高出9g,使用寿命高出2个月。
表 1不同滤纸的过滤效率比较
滤纸 | 普通滤纸 | 复合滤纸1 | 复合滤纸2 |
过滤效率/% | 80 | 95 | 97 |
容尘量/g | 12 | 21 | 21 |
使用寿命/月 | 4 | 6 | 6 |
Claims (3)
1.一种提高表面容尘的复合滤纸制造方法,其特征在于所述制造方法使用的装置包含高压电场发生器(1)、贮液槽(2)、拉丝滚筒电极(3)、收集电极板(4)、基底织物卷筒(5)和烘箱(6),拉丝滚筒电极(3)部分位于贮液槽(2)内,浸没于放置于贮液槽(2)中的超细纤维溶液中,拉丝滚筒电极(3)上方是收集电极板,高压电场发生器(1)分别连接拉丝滚筒电极(3)和收集电极板(4),使拉丝滚筒电极(3)和收集电极板(4)之间形成高压静电场,基底织物通过基底织物卷筒(5)的转动,在拉丝滚筒电极(3)和收集电极板(4)之间移动,超细纤维溶液在高压静电场的作用下,呈丝状粘附于基底织物上,经过烘箱,超细纤维溶液溶剂挥发,形成纳米纤维,将超细纤维面层和基底织物复合,得到复合滤纸;
具体步骤如下:
(1)选择基底织物,所述基底织物采用丙纶、涤纶、锦纶、粘胶纤维、腈纶、乙纶或氯纶制成的无纺布中任一种,无纺布纤维直径D1≥5μm;将超细纤维溶解于有机溶剂中,配制成超细纤维溶液;所述有机溶剂采用以常态下呈液态的易挥发有机物为溶剂,具体为乙醇、丙酮、***或氯仿中任一种,超细纤维采用玻璃纤维、涤纶、尼龙或纤维素纤维中任一种,超细纤维为溶质,制得超细纤维溶液,超细纤维直径D2≤1μm,质量浓度为2~8%;
(2)设收集电极板长度为L,拉丝滚筒电极的直径为D3,控制D3/L为0.5~1,将拉丝滚筒电极(3)一部分浸没在超细纤维溶液中,浸没部分为0.1~0.5D3,拉丝滚筒电极(3)和收集电极板(4)的电导率均在10Ω·cm以上;
(3)将步骤(1)所述基底织物穿过收集电极板(4)和拉丝滚筒电极(3)之间,控制收集电极板(4)和拉丝滚筒电极轴的距离为5-50cm,在高压电场发生器(1)的作用下,拉丝滚筒电极(3)和收集电极板(4)之间形成高压静电场,使被拉丝滚筒电极带起的超细纤维溶液粘附到基底织物上,经过烘箱(6),有机溶剂得以挥发,最终得到具有均匀且致密的超细纤维层的复合滤纸;高压电场发生器输出电压1~50kv。
2.一种如权利要求1所述的提高表面容尘的复合滤纸制造方法使用的装置,其特征在于该装置包含高压电场发生器(1)、贮液槽(2)、拉丝滚筒电极(3)、收集电极板(4)、基底织物卷筒(5)和烘箱(6),拉丝滚筒电极(3)部分位于贮液槽(2)内,浸没于放置于贮液槽(2)中的超细纤维溶液中,拉丝滚筒电极(3)上方是收集电极板,高压电场发生器(1)分别连接拉丝滚筒电极(3)和收集电极板(4),使拉丝滚筒电极(3)和收集电极板(4)之间形成高压静电场,基底织物通过基底织物卷筒(5)的转动,在拉丝滚筒电极(3)和收集电极板(4)之间移动,超细纤维溶液在高压静电场的作用下,呈丝状粘附于基底织物上,经过烘箱,超细纤维溶液溶剂挥发,形成纳米纤维,将超细纤维面层和基底织物复合,得到复合滤纸。
3.根据权利要求2所述的装置,其特征在于所述拉丝滚筒电极(3)由几个圆柱绕滚筒轴均匀固定,小圆柱的个数依实际应用时需求而定。
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