CN111155238A - 纺粘法弱酸无纺布制造工艺 - Google Patents

纺粘法弱酸无纺布制造工艺 Download PDF

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CN111155238A
CN111155238A CN201910626889.7A CN201910626889A CN111155238A CN 111155238 A CN111155238 A CN 111155238A CN 201910626889 A CN201910626889 A CN 201910626889A CN 111155238 A CN111155238 A CN 111155238A
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张建荣
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Abstract

本发明公开了纺粘法弱酸无纺布制造工艺,包括纺丝过程、成网过程、固网过程、亲水处理、烘干处理以及绕卷,其中布样的上油率为35%‑45%,使布样的PH值可稳定在5.0~6.0之间,使布样与宝宝肌肤的PH值相近,则处于弱酸性状态下。

Description

纺粘法弱酸无纺布制造工艺
技术领域
本发明涉及非织布制造,具体涉及纺粘法弱酸无纺布制造工艺。
背景技术
宝宝的肌肤在0~6个月时,PH值6.5左右;6~18个月为6左右;18个月以上为5.5左右。宝宝穿上纸尿裤后都会形成一个自然的微环境,由于宝宝肌肤比较娇嫩,所以对于微环境的酸碱度要求也比较高。因此纸尿裤面层如与宝宝肌肤的PH值相近时,则处于弱酸性状态下,才能使肌肤处于最佳的状态。若是呈碱性(PH值大于7.5)就容易滋生细菌,引起感染发炎,免疫功能随之减弱,对宝宝的身体健康造成影响。而传统纸尿裤面层材料的PH值一般都大于6.5,如何使宝宝肌肤处于一个干爽、安全、舒适的环境是本领域需要解决的重大问题。
发明内容
为了克服现有技术的不足,本发明提供纺粘法弱酸无纺布制造工艺。
本发明解决其技术问题所采用的技术方案是:纺粘法弱酸无纺布制造工艺,包括以下步骤,
a.纺丝过程,同时设置S1纺粘主机、S2纺粘主机进行纺丝,将PP切片主料和辅助母料分别加入混料器内进行混料,混合均匀后进入螺杆挤出机中,螺杆挤出机套筒分区加热,切片粒子在螺杆挤出机中混合熔融后形成熔体,熔体进入过滤器中进行过滤,过滤后的熔体经计量泵后进入纺丝箱体混合均匀再进入喷丝板,并经喷丝孔喷出形成连续的熔体细流,即初生纤维,初生纤维再经单体吸收、冷风冷却和气流牵伸,最后形成长丝;
b.成网过程,S1纺粘主机于a步骤形成的长丝通过杂乱系统使纤维杂乱均匀地分散在成网帘上,通过预热轧辊进行预压形成纤网,防止出现飞丝,然后形成的纤网再依次通过随后的S2纺粘主机,S2纺粘主机于a步骤形成的长丝通过杂乱系统使纤维杂乱均匀地分散在纤网上,S1纺粘主机、S2纺粘主机的生成的纤网逐一进行在线叠层,形成SS非织造纤网;
c.固网过程,将b步骤中形成的SS非织造纤网由输送帘送进热轧机进行热粘合形成布样;
d.亲水处理,经c步骤热轧机热粘合后送入线上亲水处理装置,对c步骤中的布样进行喷洒亲水油剂;
e.烘干处理,对d步骤中的布样送入烘箱烘干;
f.绕卷,对e步骤进行烘干后的布样进行绕卷;其中d步骤中布样的上油率为35%-45%。
其中:所述PP切片主料和辅助母料具体为PP、白色母粒、第一柔软母粒、第二柔软母粒,按质量百分比算,PP 95%~98%、白色母粒0.2%~0.5%、第一柔软母粒0.5%~0.8%、第二柔软母粒1%~2%。
其中:d步骤中所喷洒的亲水油剂为Stantex S 6087-4油剂。
其中:所述亲水油剂与水相互混合,其油水混合比为1:2.5~1:3.5。
本发明的有益效果是:该工艺中分别通过纺丝过程、成网过程、固网过程、亲水处理、烘干处理以及绕卷,其中布样的上油率为35%-45%,使布样的PH值可稳定在5.0~6.0之间,使布样与宝宝肌肤的PH值相近,则处于弱酸性状态下。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明的工艺流程示意图;
图2是本发明的亲水装置上油工艺示意图;
图3是本发明的布样打孔结构示意图;
图4是本发明的转盘局部结构示意图;
图5是本发明的预热轧辊布置结构示意图。
具体实施方式
参照图1至图5,纺粘法弱酸无纺布制造工艺,包括以下步骤,a.纺丝过程,同时设置S1纺粘主机、S2纺粘主机进行纺丝,将PP切片主料和辅助母料分别加入混料器内进行混料,具体为将PP切片主料和辅助母料分别加入各自料桶中,通过真空吸料装置将粒子吸入到各自的料槽中,再按设置好的比例吸进入料斗并于混料器内进行混料,混合后形成的切片粒子进入螺杆挤出机中,螺杆挤出机套筒分区加热,切片粒子在螺杆挤出机中混合熔融后形成熔体,熔体进入过滤器中进行过滤,过滤后的熔体经计量泵后进入纺丝箱体混合均匀再进入喷丝板,并经喷丝孔喷出形成连续的熔体细流,即初生纤维,初生纤维再经单体吸收、冷风冷却和气流牵伸,最后形成长丝;
b.成网过程,S1纺粘主机于a步骤形成的长丝通过杂乱系统使纤维杂乱均匀地分散在成网帘上,通过预热轧辊进行预压形成纤网,防止出现飞丝,然后形成的纤网再依次通过随后的S2纺粘主机,S2纺粘主机于a步骤形成的长丝通过杂乱系统使纤维杂乱均匀地分散在纤网上,S1纺粘主机、S2纺粘主机的生成的纤网逐一进行在线叠层,形成SS非织造纤网;
c.固网过程,将b步骤中形成的SS非织造纤网由输送帘送进热轧机进行热粘合形成布样;
d.亲水处理,经c步骤热轧机热粘合后送入线上亲水处理装置,对c步骤中的布样进行喷洒亲水油剂;
e.烘干处理,对d步骤中的布样送入烘箱烘干;
f.绕卷,对e步骤进行烘干后的布样进行绕卷。其中d步骤中布样的上油率为35%-45%。
所述PP切片主料和辅助母料具体为PP、白色母粒、第一柔软母粒、第二柔软母粒,按质量百分比算,PP 95%~98%、白色母粒0.2%~0.5%、第一柔软母粒0.5%~0.8%、第二柔软母粒1%~2%。其中d步骤中所喷洒的亲水油剂为Stantex S 6087-4油剂。所述亲水油剂与水相互混合,其油水混合比为1:2.5~1:3.5。
其中亲水处理装置包括容置亲水油剂与水混合物的容置箱体1、喷洒框体2,所述容置箱体1内设置使亲水油剂与水相互混合均匀的搅拌桨11,其中搅拌桨11连接设置于箱体1上的第一电机12,其中第一电机12的转速为50-100rpm,所述容置箱体1通过第一管体41连通泵体4,所述泵体4连通输送管5,其中输送管5与输液管体6连通,所述输液管体6上方为“U”型,使输液管体6进行输液时输送量较为稳定,其中输液管体6另一端为开口端,其中输液管体6设置20条,输液管体6均设置于喷洒框体2内,其中输送管5上设置阀门7,其中开口端下方对应设置喷洒装置,所述喷洒装置包括转盘81、与转盘81连接的传动轴82、与喷洒框体2固定连接的固定座83、固定设置于固定座83上的轴承84、固定设置于传动轴82末端的齿轮85,其中传动轴82与轴承84内固定连接,所述齿轮85与链条86相互连接,其中链条86连接第二电机861,所述转盘81上表面设置多个凸起811,所述凸起811呈旋转对称分布于转盘81上,其中布样9于转盘81下方进行传输。通过泵体4进行输送亲水油剂与水的混合物至输送管5,通过输送管5进行输送液体到输液管体6内,由于输液管体6上方设置“u”型,避免液体通过靠近泵体5一端的流量较大的问题,通过输液管体6进行输液至转盘81上,转盘81通过第二电机861、链条86、齿轮85、传动轴82进行传动而旋转,液体接触旋转的转盘81转速约为6000rpm,转盘81上设置多个凸起811,高速离心使液体被撞击成雾状进行喷洒至前方传输的布样9上,使亲水油剂与水的混合物进行粘附于布样9上,其中亲水油剂:水为1:2.5~1:3.5,使用喷洒方式对布样9进行亲水处理,亲水处理完毕后送入烘箱进行烘干处理。
其中成网帘通过多个辊31进行带动移动,成网帘于S1纺粘主机、S2纺粘主机各自的杂乱系统下方均设置吸风装置32,其中吸风装置32对应设置于成网帘下方,使长丝暂时进行贴合成网帘,便于进行输送。同时成网帘上方设置预热轧辊33,预热轧辊33分别S1纺粘主机、S2纺粘主机各自的杂乱系统斜下方,对长丝初铺纤网进行预轧。
所用亲水油剂为阳离子型亲水油剂,在水溶液下电离出H+,从而使周边环境呈现弱酸性。该亲水油剂为天然弱酸性油剂,不含其它弱酸性添加物,即其弱酸性耐久性强。通过不断的试验调整油水配比,以及不断检测生产出来试样性能与PH值,通过调整亲水油剂的上油比例来实现PH值的范围,最后得出亲水油剂的上油率为35~45%生产出的试样,其PH值可稳定在5.0~6.0之间,其他性能达到最佳。
产品性能最佳的原料投比范围为:
Figure BDA0002133685720000061
生产设定产品克重为15g/m2的工艺参数如下:
Figure BDA0002133685720000062
Figure BDA0002133685720000071
通过对以上工艺试验出的样品进行物性检测,FZ/T60017-93方法测试液体穿透时间和返湿量,GB-T 7573-2009方法测试PH值。测试结果如下:
Figure BDA0002133685720000072
通过物性检测发现,该油剂的亲水效果上比普通亲水油剂的亲水性能差一些,所以后续我们要实现既确保产品PH值的稳定性,又要在原基础上提高产品的亲水性能,缩短液体的穿透时间,于是对产品进行打孔后处理加工试验。
与普通亲水无纺布相比,PH值有了很大的改善,并且属于可控值。但是该试样的亲水性能要差上些许,于是为了实现产品的更优化,于是生产了23g/m2的面层材料,生产出的23g/m2面层将作为后整理打孔基布,以下为生产23g/m2面层打孔基布的工艺参数:
Figure BDA0002133685720000081
对23g/m2的面层基布进行后整理打孔处理,以提高亲水性,减少液体穿透时间。后整理打孔处理参数如下表:
Figure BDA0002133685720000082
通过对打孔的布样进行性能测试,特别是亲水性能测试,发现多次穿透时间出现了极大的提高,在实现亲水穿透时间缩短的同时,回渗值也有所减少,而且强力了出现小幅度的提高,主要性能测试结果如下表:
Figure BDA0002133685720000091
通过后处理打孔后,液体多次穿透时间得到了极大的改善,因此在其他性能不受影响的情况下既提高了亲水性能,又能使得到所要求PH范围值。
根据行业标准ATCC 6538和ATCC 8739方法测试葡萄球菌和大肠杆菌的抗菌性能,测试结果如下:
Figure BDA0002133685720000092
试验表明,本发明的产品具有良好的抑菌性能的优点。
在本发明中:该工艺中分别通过纺丝过程、成网过程、固网过程、亲水处理、烘干处理以及绕卷,其中布样的上油率为35%-45%,使布样的PH值可稳定在5.0~6.0之间,使布样与宝宝肌肤的PH值相近,则处于弱酸性状态下。

Claims (4)

1.纺粘法弱酸无纺布制造工艺,其特征在于:包括以下步骤,
a.纺丝过程,同时设置S1纺粘主机、S2纺粘主机进行纺丝,将PP切片主料和辅助母料分别加入混料器内进行混料,混合后形成的切片粒子进入螺杆挤出机中,螺杆挤出机套筒分区加热,切片粒子在螺杆挤出机中混合熔融后形成熔体,熔体进入过滤器中进行过滤,过滤后的熔体经计量泵后进入纺丝箱体混合均匀再进入喷丝板,并经喷丝孔喷出形成连续的熔体细流,即初生纤维,初生纤维再经单体吸收、冷风冷却和气流牵伸,最后形成长丝;
b.成网过程,S1纺粘主机于a步骤形成的长丝通过杂乱系统使纤维杂乱均匀地分散在成网帘上,通过预热轧辊进行预压形成纤网,防止出现飞丝,然后形成的纤网再依次通过随后的S2纺粘主机,S2纺粘主机于a步骤形成的长丝通过杂乱系统使纤维杂乱均匀地分散在纤网上,S1纺粘主机、S2纺粘主机的生成的纤网逐一进行在线叠层,形成SS非织造纤网;
c.固网过程,将b步骤中形成的SS非织造纤网由输送帘送进热轧机进行热粘合形成布样;
d.亲水处理,经c步骤热轧机热粘合后送入线上亲水处理装置,对c步骤中的布样进行喷洒亲水油剂;
e.烘干处理,对d步骤中的布样送入烘箱烘干;
f.绕卷,对e步骤进行烘干后的布样进行绕卷;其中d步骤中布样的上油率为35%-45%。
2.根据权利要求1所述纺粘法弱酸无纺布制造工艺,其特征在于:所述PP切片主料和辅助母料具体为PP、白色母粒、第一柔软母粒、第二柔软母粒,按质量百分比算,PP 95%~98%、白色母粒0.2%~0.5%、第一柔软母粒0.5%~0.8%、第二柔软母粒1%~2%。
3.根据权利要求1所述纺粘法弱酸无纺布制造工艺,其特征在于:d步骤中所喷洒的亲水油剂为Stantex S 6087-4油剂。
4.根据权利要求1所述纺粘法弱酸无纺布制造工艺,其特征在于:所述亲水油剂与水相互混合,其油水混合比为1:2.5~1:3.5。
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