CN109097973A - 一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法 - Google Patents

一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法 Download PDF

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CN109097973A
CN109097973A CN201810957796.8A CN201810957796A CN109097973A CN 109097973 A CN109097973 A CN 109097973A CN 201810957796 A CN201810957796 A CN 201810957796A CN 109097973 A CN109097973 A CN 109097973A
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袁超
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ANHUI LISIDA NET INDUSTRY Co Ltd
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Abstract

本发明公开了一种除尘布袋用三氯化铁‑驻极改性无纺布的制备方法，将干燥的聚对苯二甲酸丁二醇酯切片和流动改性剂在双螺杆挤出机中共混，熔体细流冷凝后，经风干机风干、切粒机切粒，得到改性聚对苯二甲酸丁二醇酯切片；将改性后的切片在螺杆挤出机中加热熔融后经喷丝口挤出，熔体细流被拉伸成纤维，冷却固化，自粘合作用形成无纺布；将所得无纺布浸泡在三氯化铁与硫酸水溶液形成的腐蚀液中反应后，干燥，室温下在水中浸泡，再干燥，制得三氯化铁改性无纺布；将所得三氯化铁改性无纺布进行裁剪，然后放在静电消除器下缓慢移动，去除表面静电，进行加热处理后，用驻极设备进行电晕充电，制得除尘布袋用改性无纺布。

Description

一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法
技术领域
本发明属于除尘布袋材料领域，具体涉及一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法。
背景技术
聚对苯二甲酸丁二醇酯是一种结晶型热塑性聚酯，它具有结晶速度快、机械强度高、尺寸稳定、电绝缘性能良好等特点，此外还具有突出的耐热、耐酸、耐油污和耐化学腐蚀性能。熔喷法制备的无纺布纤维细且柔软，是一种理想的过滤材料。本发明旨在将适量的流动改性剂加入切片中进行共混改性，大幅提升熔喷加工中熔体流动性；并制备出一种孔径较小、过滤精度较高的改性熔喷无纺布滤芯，以期在除尘布袋方面有着良好的应用前景。
发明内容
本发明的目的是针对现有的问题，提供了一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，依照该方法制作的除尘布袋用改性无纺布对空气的过滤性能优。
本发明是通过以下技术方案实现的：
一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，其特征在于，包括如下步骤：
（1）聚对苯二甲酸丁二醇酯切片的共混改性：
将94-96份干燥的聚对苯二甲酸丁二醇酯切片和4-6份流动改性剂在双螺杆挤出机中共混，熔体细流冷凝后，经风干机风干、切粒机切粒，得到改性聚对苯二甲酸丁二醇酯切片；将改性后的切片在螺杆挤出机中加热熔融后经喷丝口挤出，熔体细流被拉伸成纤维，冷却固化，自粘合作用形成无纺布；
（2）三氯化铁改性无纺布的制备：
将（1）中所得无纺布浸泡在三氯化铁与硫酸水溶液形成的腐蚀液中，在30-40℃下反应3-5h后，于60-80℃干燥1-2h，室温下在水中浸泡5-10h，再于60-80℃干燥1-2h，制得三氯化铁改性无纺布；
（3）驻极改性无纺布的方法：
将（2）中所得三氯化铁改性无纺布进行裁剪，然后放在静电消除器下缓慢移动，去除表面静电，在105-115℃下进行加热处理后，用驻极设备进行电晕充电，制得除尘布袋用改性无纺布。
进一步的，步骤（1）中聚对苯二甲酸丁二醇酯切片的干燥：将聚对苯二甲酸丁二醇酯切片在104-106℃真空烘箱中干燥4-6h，待用；
流动改性剂为流动改性剂FM，熔喷纺丝温度为225-390℃。
进一步的，步骤（3）中驻极充电时间为20-30s、充电距离1-5min、充电电压10-15kV。
本发明相比现有技术具有以下优点：
（1）采用双螺杆共混造粒制备了聚对苯二甲酸丁二醇酯-流动改性剂改性切片，共混体系中，少量的流动改性剂可作为结晶成核剂促进结晶，流动改性剂对聚对苯二甲酸丁二醇酯的流动性的提髙效果明显；改性后熔喷样品的纤维直径和孔径均较小，孔径分布也较均匀，并且不降低无纺布的断裂强度。
（2）采用三氯化铁来改性无纺布，其纤维表面特征发生变化，无纺布纤维表面发生断裂现象，亲水角也有所降低；空气处理效果比较理想，可满足标准。
（3）驻极处理能够很好的解决过滤阻力与过滤效率之间的矛盾，使得过滤材料具有高效率、低阻力的更加卓越的过滤能力，驻极处理后的带电熔喷纤维网能够有效过滤空气中的亚微米颗粒物；驻极处理后无纺布过滤材料的表面电势越高，则其过滤效果提升越大；
无纺布制成除尘过滤布袋，表面皆经过烧毛、压光等工艺处理，防止纤维脱落造成的二次污染；耐高温指标、过滤精度、透气量都能达到标准。
具体实施方式
实施例1
一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，其特征在于，包括如下步骤：
（1）聚对苯二甲酸丁二醇酯切片的共混改性：
将94份干燥的聚对苯二甲酸丁二醇酯切片和4份流动改性剂在双螺杆挤出机中共混，熔体细流冷凝后，经风干机风干、切粒机切粒，得到改性聚对苯二甲酸丁二醇酯切片；将改性后的切片在螺杆挤出机中加热熔融后经喷丝口挤出，熔体细流被拉伸成纤维，冷却固化，自粘合作用形成无纺布；
（2）三氯化铁改性无纺布的制备：
将（1）中所得无纺布浸泡在三氯化铁与硫酸水溶液形成的腐蚀液中，在30-40℃下反应3h后，于60-80℃干燥1h，室温下在水中浸泡5h，再于60-80℃干燥1h，制得三氯化铁改性无纺布；
（3）驻极改性无纺布的方法：
将（2）中所得三氯化铁改性无纺布进行裁剪，然后放在静电消除器下缓慢移动，去除表面静电，在105-115℃下进行加热处理后，用驻极设备进行电晕充电，制得除尘布袋用改性无纺布。
进一步的，步骤（1）中聚对苯二甲酸丁二醇酯切片的干燥：将聚对苯二甲酸丁二醇酯切片在104-106℃真空烘箱中干燥4h，待用；
流动改性剂为流动改性剂FM，熔喷纺丝温度为225-390℃。
进一步的，步骤（3）中驻极充电时间为20s、充电距离1min、充电电压10kV。
实施例2
一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，其特征在于，包括如下步骤：
（1）聚对苯二甲酸丁二醇酯切片的共混改性：
将96份干燥的聚对苯二甲酸丁二醇酯切片和6份流动改性剂在双螺杆挤出机中共混，熔体细流冷凝后，经风干机风干、切粒机切粒，得到改性聚对苯二甲酸丁二醇酯切片；将改性后的切片在螺杆挤出机中加热熔融后经喷丝口挤出，熔体细流被拉伸成纤维，冷却固化，自粘合作用形成无纺布；
（2）三氯化铁改性无纺布的制备：
将（1）中所得无纺布浸泡在三氯化铁与硫酸水溶液形成的腐蚀液中，在30-40℃下反应5h后，于60-80℃干燥2h，室温下在水中浸泡10h，再于60-80℃干燥2h，制得三氯化铁改性无纺布；
（3）驻极改性无纺布的方法：
将（2）中所得三氯化铁改性无纺布进行裁剪，然后放在静电消除器下缓慢移动，去除表面静电，在105-115℃下进行加热处理后，用驻极设备进行电晕充电，制得所述除尘布袋用无纺布。
进一步的，步骤（1）中聚对苯二甲酸丁二醇酯切片的干燥：将聚对苯二甲酸丁二醇酯切片在104-106℃真空烘箱中干燥6h，待用；
流动改性剂为流动改性剂FM，熔喷纺丝温度为225-390℃。
进一步的，步骤（3）中驻极充电时间为30s、充电距离5min、充电电压15kV。
按照本发明方法制作的除尘布袋用改性无纺布对空气的过滤性能优，耐高温指标、过滤精度、透气量都能达到标准。

Claims (3)

1.一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，其特征在于，包括如下步骤：
（1）聚对苯二甲酸丁二醇酯切片的共混改性：
将94-96份干燥的聚对苯二甲酸丁二醇酯切片和4-6份流动改性剂在双螺杆挤出机中共混，熔体细流冷凝后，经风干机风干、切粒机切粒，得到改性聚对苯二甲酸丁二醇酯切片；将改性后的切片在螺杆挤出机中加热熔融后经喷丝口挤出，熔体细流被拉伸成纤维，冷却固化，自粘合作用形成无纺布；
（2）三氯化铁改性无纺布的制备：
将（1）中所得无纺布浸泡在三氯化铁与硫酸水溶液形成的腐蚀液中，在30-40℃下反应3-5h后，于60-80℃干燥1-2h，室温下在水中浸泡5-10h，再于60-80℃干燥1-2h，制得三氯化铁改性无纺布；
（3）驻极改性无纺布的方法：
将（2）中所得三氯化铁改性无纺布进行裁剪，然后放在静电消除器下缓慢移动，去除表面静电，在105-115℃下进行加热处理后，用驻极设备进行电晕充电，制得除尘布袋用改性无纺布。
2.根据权利要求1所述的一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，其特征在于，步骤（1）中聚对苯二甲酸丁二醇酯切片的干燥：将聚对苯二甲酸丁二醇酯切片在104-106℃真空烘箱中干燥4-6h，待用；
流动改性剂为流动改性剂FM，熔喷纺丝温度为225-390℃。
3.根据权利要求1所述的一种除尘布袋用三氯化铁-驻极改性无纺布的制备方法，其特征在于，步骤（3）中驻极充电时间为20-30s、充电距离1-5min、充电电压10-15kV。
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* Cited by examiner, † Cited by third party
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