CN112918049A - 一种高透气率无纺布 - Google Patents
一种高透气率无纺布 Download PDFInfo
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- CN112918049A CN112918049A CN201911239672.7A CN201911239672A CN112918049A CN 112918049 A CN112918049 A CN 112918049A CN 201911239672 A CN201911239672 A CN 201911239672A CN 112918049 A CN112918049 A CN 112918049A
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- fiber
- woven fabric
- parts
- nonwoven fabric
- woven fabrics
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Abstract
本发明公开了一种高透气率无纺布，包括上无纺布层和下无纺布层，所述上无纺布层和下无纺布层之间固定连接有PE高分子防水透气膜，所述上无纺布层上端表面开设有透气孔，所述透气孔贯穿上无纺布层且延伸至PE高分子防水透气膜表面；通过设置的PE高分子防水透气膜，解决了传统无纺布不透气而造成的不舒服感，从而可有效提高该无纺布的透气性；同时使得该无纺布具有很好的防水性，可避免水进入到该无纺布内部而出现霉变的情况，通过设置的改性竹炭粉，使得该无纺布制成衣物具有非常好的抗菌效果，可有效提高其使用范围。
Description
技术领域
本发明涉及无纺布技术领域，具体为一种高透气率无纺布。
背景技术
无纺布又称不织布，是由定向的或随机的纤维而构成。因具有布的外观和某些性能而称其为布。无纺布具有防潮、透气、柔韧、质轻、不助燃、容易分解、无毒无刺激性、色彩丰富、价格低廉、可循环再用等特点。如多采用聚丙烯(pp材质)粒料为原料，经高温熔融、喷丝、铺纲、热压卷取连续一步法生产而成，无纺布是一种非织造布，它是直接利用高聚物切片、短纤维或长丝将纤维通过气流或机械成网，然后经过水刺，针刺，或热轧加固，最后经过后整理形成的无编织的布料。具有柔软、透气和平面结构的新型纤维制品，优点是不产生纤维屑，强韧、耐用、丝般柔软，也是增强材料的一种，而且还有棉质的感觉，和棉织品相比，无纺布的袋子容易成形，而且造价便宜。
但是，目前市场上多数的无纺布透气性能不高，难以满足市场的需求，并且传统的无纺布防水性能比较差，在湿度较大或者淋水的情况下会极大地影响无纺布的后续使用。
发明内容
本发明的目的在于提供一种高透气率无纺布，以解决上述背景技术中提出的问题。
为实现上述目的，本发明提供如下技术方案：一种高透气率无纺布，包括上无纺布层和下无纺布层，所述上无纺布层和下无纺布层之间固定连接有PE高分子防水透气膜，所述上无纺布层上端表面开设有透气孔，所述透气孔贯穿上无纺布层且延伸至PE高分子防水透气膜表面。
优选的，其原料按重量份包括：聚丙烯50-60份、聚酯纤维10-15份、醋酸丁酸纤维素酯10-15份、改性桑皮纤维8-10份、改性聚乙烯醇纤维10-15份、饱和芥酸酰胺3-5份、改性竹炭粉15-20份、芦荟纤维5-10份、抗氧剂3-5份、植物提取物3-5份。
优选的，其制备方法包括以下步骤：
S1、熔融共混：将聚丙烯、聚酯纤维、醋酸丁酸纤维素酯、改性桑皮纤维、改性聚乙烯醇纤维、饱和芥酸酰胺、芦荟纤维、抗氧剂按照配方进行配比送入螺杆挤压机中，原料通过螺杆挤压机的螺杆进行输送和混合，同时加热升温至150-165℃，使得物料之间充分混合、熔融并形成熔体；
S2、纺丝：熔体进入纺丝箱体，纺丝箱体对熔体进行分配，使熔体均匀地沿无纺布的幅宽分布，随后熔体经喷丝板挤出成丝；
S3、牵伸成网：利用风机产生的高速冷空气流实现对熔体细流的牵伸，使熔体细流成为高度取向的纤维，并受到下抽风的吸力，铺在网帘上，在下抽风负压作用下，纺丝系统的牵伸气流被抽走，而纤维网则留在成网机的网帘上形成单层的无纺布纤维网；
S4、粘合：将改性聚乙烯醇加入喷涂装置料筒，通过喷涂工艺将粘合剂均匀的喷到两层无纺布纤维网之间，上下振动无纺布纤维网，使粘合剂快速均匀的渗透到无纺布纤维网中；
S5、低温烘干：将振动处理后的无纺布纤维网进入烘箱进行烘干，烘箱温度40-50℃；
S6、加工：将制得的无纺布分成两组，然后将热轧机导热油加热至120-140°，同时将底布铺平，再根据产品的含炭量要求通过炭粉喷撒机均匀喷撒一层80-400目的改性竹炭粉，同时再将植物提取物喷洒一层，然后按炭粉量及炭粉目数调整胶水比例及浓度，通过喷胶机均匀喷洒胶水，然后覆盖上PE高分子防水透气膜，最后覆盖上无纺布，形成松散性复合体，最后再导入热轧机的热轧辊，在导热油和辊压力的作用下热轧为一体，即可制得高透气率无纺布；
S7、包装：然后进行切边，并且在切片后的成品通过收卷机卷取成卷。
优选的，所述改性聚乙烯醇纤维为氨基甲酰乙基化聚乙烯醇纤维，具体为在含丙烯酰胺32g/L、硫酸钠25％和磷酸氢二钠2％的水溶液中，先在100℃下熟化5min，后于50℃下处理3h，即得所需改性聚乙烯醇纤维。
优选的，所述芦荟纤维为普通芦荟经脱胶、脱苦、切丝、破碎，经溶液纺丝制得。
优选的，所述抗氧剂为二烷基二硫代氨基甲酸钼、亚磷酸三丁酯或二烷基二苯胺。
优选的，所述植物提取物为灯笼果、鼠尾草、茶渣、芦荟、艾蒿、陈皮、五味子、栀子、刺五加、甘草、黄连、大黄、蒲公英、车前子、生姜、大蒜、鱼腥草中的一种或多种的提取物。
优选的，所述在步骤S2中，纺丝箱体的温度设置为190-210℃。
优选的，所述在步骤S5中，无纺布纤维网通过烘箱速度为15-20m/min。
优选的，所述在步骤S7中，切片的大小可根据实际所需大小决定。
与现有技术相比，本发明的有益效果是：
1.通过设置的PE高分子防水透气膜，由于PE高分子防水透气膜的微孔直径0.2～10微米，孔隙率达80％以上，相当于一个平方厘米上有十多亿个微孔，由于微孔直径是水滴直径的1/5000～1/20000，是水蒸汽分子直径的700倍左右，因此可以阻止水滴通过，而让水蒸气分子自由通过，如果用该无纺布制成与人体贴合的衣物时，汗水蒸汽利用衣料内温度与外界环境温度之间温差及湿度差而排向外界，解决了传统无纺布不透气而造成的不舒服感，从而可有效提高该无纺布的透气性；同时使得该无纺布具有很好的防水性，可避免水进入到该无纺布内部而出现霉变的情况。
2.通过设置的改性竹炭粉，由于改性竹炭粉不仅保留了竹炭强大的吸附能力，调节湿度及释放负离子、远红外线，电磁屏蔽作用外，还能吸附有毒物质如氨、甲醛、苯酚，并对吸附的细菌如葡萄球菌、大肠杆菌、白色念球菌具有很好的杀菌抑制作用，使得该无纺布制成衣物具有非常好的抗菌效果，可有效提高其使用范围。
附图说明
图1为本发明的剖面结构图。
图中：1-上无纺布层；2-PE高分子防水透气膜；3-下无纺布层；4-透气孔。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1：
请参阅图1，本发明提供一种技术方案：一种高透气率无纺布，包括上无纺布层1和下无纺布层3，所述上无纺布层1和下无纺布层3之间固定连接有PE高分子防水透气膜2，所述上无纺布层1上端表面开设有透气孔4，所述透气孔4贯穿上无纺布层1且延伸至PE高分子防水透气膜2表面。
其中，其原料按重量份包括：聚丙烯52份、聚酯纤维12份、醋酸丁酸纤维素酯12份、改性桑皮纤维8.5份、改性聚乙烯醇纤维12份、饱和芥酸酰胺3份、改性竹炭粉16份、芦荟纤维6份、抗氧剂3份、植物提取物3份。
其中，其制备方法包括以下步骤：
S1、熔融共混：将聚丙烯、聚酯纤维、醋酸丁酸纤维素酯、改性桑皮纤维、改性聚乙烯醇纤维、饱和芥酸酰胺、芦荟纤维、抗氧剂按照配方进行配比送入螺杆挤压机中，原料通过螺杆挤压机的螺杆进行输送和混合，同时加热升温至150-165℃，使得物料之间充分混合、熔融并形成熔体；
S2、纺丝：熔体进入纺丝箱体，纺丝箱体对熔体进行分配，使熔体均匀地沿无纺布的幅宽分布，随后熔体经喷丝板挤出成丝；
S3、牵伸成网：利用风机产生的高速冷空气流实现对熔体细流的牵伸，使熔体细流成为高度取向的纤维，并受到下抽风的吸力，铺在网帘上，在下抽风负压作用下，纺丝系统的牵伸气流被抽走，而纤维网则留在成网机的网帘上形成单层的无纺布纤维网；
S4、粘合：将改性聚乙烯醇加入喷涂装置料筒，通过喷涂工艺将粘合剂均匀的喷到两层无纺布纤维网之间，上下振动无纺布纤维网，使粘合剂快速均匀的渗透到无纺布纤维网中；
S5、低温烘干：将振动处理后的无纺布纤维网进入烘箱进行烘干，烘箱温度40-50℃；
S6、加工：将制得的无纺布分成两组，然后将热轧机导热油加热至120-140°，同时将底布铺平，再根据产品的含炭量要求通过炭粉喷撒机均匀喷撒一层80-400目的改性竹炭粉，同时再将植物提取物喷洒一层，然后按炭粉量及炭粉目数调整胶水比例及浓度，通过喷胶机均匀喷洒胶水，然后覆盖上PE高分子防水透气膜，最后覆盖上无纺布，形成松散性复合体，最后再导入热轧机的热轧辊，在导热油和辊压力的作用下热轧为一体，即可制得高透气率无纺布；
S7、包装：然后进行切边，并且在切片后的成品通过收卷机卷取成卷。
其中，所述改性聚乙烯醇纤维为氨基甲酰乙基化聚乙烯醇纤维，具体为在含丙烯酰胺32g/L、硫酸钠25％和磷酸氢二钠2％的水溶液中，先在100℃下熟化5min，后于50℃下处理3h，即得所需改性聚乙烯醇纤维。
其中，所述芦荟纤维为普通芦荟经脱胶、脱苦、切丝、破碎，经溶液纺丝制得。
其中，所述抗氧剂为二烷基二硫代氨基甲酸钼、亚磷酸三丁酯或二烷基二苯胺。
其中，所述植物提取物为灯笼果、鼠尾草、茶渣、芦荟、艾蒿、陈皮、五味子、栀子、刺五加、甘草、黄连、大黄、蒲公英、车前子、生姜、大蒜、鱼腥草中的一种或多种的提取物。
其中，所述在步骤S2中，纺丝箱体的温度设置为190-210℃。
其中，所述在步骤S5中，无纺布纤维网通过烘箱速度为15-20m/min。
其中，所述在步骤S7中，切片的大小可根据实际所需大小决定。
测试方法：对传统的无纺布和实施例一制成的无纺布进行测试，用透气量仪测量两组无纺布的透气性，通常以透气量表示，即无纺布两边在维持一定的压力差条件下，单位时间内通过无纺布单位面积的空气量，本质上是气体的流动速度，按公式计算：BP(ml/cm2·s)＝V/AFt；式中：V—t秒内通过无纺布的空气量(mL)；AF—无纺布的面积(cm2)。
测试原理：在规定压力下，测定单位时间内垂直通过试样的空气流量，推算无纺布的透气性。
测试结果如下表：
| 项目 | 透气量(ml/cm2·s) |
| 传统无纺布 | 80.32 |
| 实施例一无纺布 | 90.56 |
由上表可以看出，实施例一无纺布的透气性能远优于市面上传统的无纺布。
实施例2：
请参阅图1，本发明提供一种技术方案：一种高透气率无纺布，其原料按重量份包括：聚丙烯54份、聚酯纤维13份、醋酸丁酸纤维素酯13份、改性桑皮纤维9.5份、改性聚乙烯醇纤维13份、饱和芥酸酰胺3.5份、改性竹炭粉17份、芦荟纤维7份、抗氧剂3.5份、植物提取物3.5份。
其中，其制备方法包括以下步骤：
S1、熔融共混：将聚丙烯、聚酯纤维、醋酸丁酸纤维素酯、改性桑皮纤维、改性聚乙烯醇纤维、饱和芥酸酰胺、芦荟纤维、抗氧剂按照配方进行配比送入螺杆挤压机中，原料通过螺杆挤压机的螺杆进行输送和混合，同时加热升温至150-165℃，使得物料之间充分混合、熔融并形成熔体；
S2、纺丝：熔体进入纺丝箱体，纺丝箱体对熔体进行分配，使熔体均匀地沿无纺布的幅宽分布，随后熔体经喷丝板挤出成丝；
S3、牵伸成网：利用风机产生的高速冷空气流实现对熔体细流的牵伸，使熔体细流成为高度取向的纤维，并受到下抽风的吸力，铺在网帘上，在下抽风负压作用下，纺丝系统的牵伸气流被抽走，而纤维网则留在成网机的网帘上形成单层的无纺布纤维网；
S4、粘合：将改性聚乙烯醇加入喷涂装置料筒，通过喷涂工艺将粘合剂均匀的喷到两层无纺布纤维网之间，上下振动无纺布纤维网，使粘合剂快速均匀的渗透到无纺布纤维网中；
S5、低温烘干：将振动处理后的无纺布纤维网进入烘箱进行烘干，烘箱温度40-50℃；
S6、加工：将制得的无纺布分成两组，然后将热轧机导热油加热至120-140°，同时将底布铺平，再根据产品的含炭量要求通过炭粉喷撒机均匀喷撒一层80-400目的改性竹炭粉，同时再将植物提取物喷洒一层，然后按炭粉量及炭粉目数调整胶水比例及浓度，通过喷胶机均匀喷洒胶水，然后覆盖上PE高分子防水透气膜，最后覆盖上无纺布，形成松散性复合体，最后再导入热轧机的热轧辊，在导热油和辊压力的作用下热轧为一体，即可制得高透气率无纺布；
S7、包装：然后进行切边，并且在切片后的成品通过收卷机卷取成卷。
其中，所述改性聚乙烯醇纤维为氨基甲酰乙基化聚乙烯醇纤维，具体为在含丙烯酰胺32g/L、硫酸钠25％和磷酸氢二钠2％的水溶液中，先在100℃下熟化5min，后于50℃下处理3h，即得所需改性聚乙烯醇纤维。
其中，所述芦荟纤维为普通芦荟经脱胶、脱苦、切丝、破碎，经溶液纺丝制得。
其中，所述抗氧剂为二烷基二硫代氨基甲酸钼、亚磷酸三丁酯或二烷基二苯胺。
其中，所述植物提取物为灯笼果、鼠尾草、茶渣、芦荟、艾蒿、陈皮、五味子、栀子、刺五加、甘草、黄连、大黄、蒲公英、车前子、生姜、大蒜、鱼腥草中的一种或多种的提取物。
其中，所述在步骤S2中，纺丝箱体的温度设置为190-210℃。
其中，所述在步骤S5中，无纺布纤维网通过烘箱速度为15-20m/min。
其中，所述在步骤S7中，切片的大小可根据实际所需大小决定。
测试方法：对传统的无纺布和实施例二制成的无纺布进行测试，用透气量仪测量两组无纺布的透气性，通常以透气量表示，即无纺布两边在维持一定的压力差条件下，单位时间内通过无纺布单位面积的空气量，本质上是气体的流动速度，按公式计算：BP(ml/cm2·s)＝V/AFt；式中：V—t秒内通过无纺布的空气量(mL)；AF—无纺布的面积(cm2)。
测试原理：在规定压力下，测定单位时间内垂直通过试样的空气流量，推算无纺布的透气性。
测试结果如下表：
由上表可以看出，实施例二无纺布的透气性能远优于市面上传统的无纺布。
实施例3：
请参阅图1，本发明提供一种技术方案：一种高透气率无纺布，其原料按重量份包括：聚丙烯56份、聚酯纤维14份、醋酸丁酸纤维素酯14份、改性桑皮纤维10份、改性聚乙烯醇纤维15份、饱和芥酸酰胺5份、改性竹炭粉20份、芦荟纤维10份、抗氧剂5份、植物提取物5份。
其中，其制备方法包括以下步骤：
S1、熔融共混：将聚丙烯、聚酯纤维、醋酸丁酸纤维素酯、改性桑皮纤维、改性聚乙烯醇纤维、饱和芥酸酰胺、芦荟纤维、抗氧剂按照配方进行配比送入螺杆挤压机中，原料通过螺杆挤压机的螺杆进行输送和混合，同时加热升温至150-165℃，使得物料之间充分混合、熔融并形成熔体；
S2、纺丝：熔体进入纺丝箱体，纺丝箱体对熔体进行分配，使熔体均匀地沿无纺布的幅宽分布，随后熔体经喷丝板挤出成丝；
S3、牵伸成网：利用风机产生的高速冷空气流实现对熔体细流的牵伸，使熔体细流成为高度取向的纤维，并受到下抽风的吸力，铺在网帘上，在下抽风负压作用下，纺丝系统的牵伸气流被抽走，而纤维网则留在成网机的网帘上形成单层的无纺布纤维网；
S4、粘合：将改性聚乙烯醇加入喷涂装置料筒，通过喷涂工艺将粘合剂均匀的喷到两层无纺布纤维网之间，上下振动无纺布纤维网，使粘合剂快速均匀的渗透到无纺布纤维网中；
S5、低温烘干：将振动处理后的无纺布纤维网进入烘箱进行烘干，烘箱温度40-50℃；
S6、加工：将制得的无纺布分成两组，然后将热轧机导热油加热至120-140°，同时将底布铺平，再根据产品的含炭量要求通过炭粉喷撒机均匀喷撒一层80-400目的改性竹炭粉，同时再将植物提取物喷洒一层，然后按炭粉量及炭粉目数调整胶水比例及浓度，通过喷胶机均匀喷洒胶水，然后覆盖上PE高分子防水透气膜，最后覆盖上无纺布，形成松散性复合体，最后再导入热轧机的热轧辊，在导热油和辊压力的作用下热轧为一体，即可制得高透气率无纺布；
S7、包装：然后进行切边，并且在切片后的成品通过收卷机卷取成卷。
其中，所述改性聚乙烯醇纤维为氨基甲酰乙基化聚乙烯醇纤维，具体为在含丙烯酰胺32g/L、硫酸钠25％和磷酸氢二钠2％的水溶液中，先在100℃下熟化5min，后于50℃下处理3h，即得所需改性聚乙烯醇纤维。
其中，所述芦荟纤维为普通芦荟经脱胶、脱苦、切丝、破碎，经溶液纺丝制得。
其中，所述抗氧剂为二烷基二硫代氨基甲酸钼、亚磷酸三丁酯或二烷基二苯胺。
其中，所述植物提取物为灯笼果、鼠尾草、茶渣、芦荟、艾蒿、陈皮、五味子、栀子、刺五加、甘草、黄连、大黄、蒲公英、车前子、生姜、大蒜、鱼腥草中的一种或多种的提取物。
其中，所述在步骤S2中，纺丝箱体的温度设置为190-210℃。
其中，所述在步骤S5中，无纺布纤维网通过烘箱速度为15-20m/min。
其中，所述在步骤S7中，切片的大小可根据实际所需大小决定。
测试方法：对传统的无纺布和实施例三制成的无纺布进行测试，用透气量仪测量两组无纺布的透气性，通常以透气量表示，即无纺布两边在维持一定的压力差条件下，单位时间内通过无纺布单位面积的空气量，本质上是气体的流动速度，按公式计算：BP(ml/cm2·s)＝V/AFt；式中：V—t秒内通过无纺布的空气量(mL)；AF—无纺布的面积(cm2)。
测试原理：在规定压力下，测定单位时间内垂直通过试样的空气流量，推算无纺布的透气性。
测试结果如下表：
| 项目 | 透气量(ml/cm2·s) |
| 传统无纺布 | 80.32 |
| 实施例三无纺布 | 95.66 |
由上表可以看出，实施例三无纺布的透气性能远优于市面上传统的无纺布。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (10)
1.一种高透气率无纺布，包括上无纺布层(1)和下无纺布层(3)，其特征在于：所述上无纺布层(1)和下无纺布层(3)之间固定连接有PE高分子防水透气膜(2)，所述上无纺布层(1)上端表面开设有透气孔(4)，所述透气孔(4)贯穿上无纺布层(1)且延伸至PE高分子防水透气膜(2)表面。
2.根据权利要求1所述的一种高透气率无纺布，其特征在于：其原料按重量份包括：聚丙烯50-60份、聚酯纤维10-15份、醋酸丁酸纤维素酯10-15份、改性桑皮纤维8-10份、改性聚乙烯醇纤维10-15份、饱和芥酸酰胺3-5份、改性竹炭粉15-20份、芦荟纤维5-10份、抗氧剂3-5份、植物提取物3-5份。
3.根据权利要求1所述的一种高透气率无纺布，其特征在于：其制备方法包括以下步骤：
S1、熔融共混：将聚丙烯、聚酯纤维、醋酸丁酸纤维素酯、改性桑皮纤维、改性聚乙烯醇纤维、饱和芥酸酰胺、芦荟纤维、抗氧剂按照配方进行配比送入螺杆挤压机中，原料通过螺杆挤压机的螺杆进行输送和混合，同时加热升温至150-165℃，使得物料之间充分混合、熔融并形成熔体；
S2、纺丝：熔体进入纺丝箱体，纺丝箱体对熔体进行分配，使熔体均匀地沿无纺布的幅宽分布，随后熔体经喷丝板挤出成丝；
S3、牵伸成网：利用风机产生的高速冷空气流实现对熔体细流的牵伸，使熔体细流成为高度取向的纤维，并受到下抽风的吸力，铺在网帘上，在下抽风负压作用下，纺丝系统的牵伸气流被抽走，而纤维网则留在成网机的网帘上形成单层的无纺布纤维网；
S4、粘合：将改性聚乙烯醇加入喷涂装置料筒，通过喷涂工艺将粘合剂均匀的喷到两层无纺布纤维网之间，上下振动无纺布纤维网，使粘合剂快速均匀的渗透到无纺布纤维网中；
S5、低温烘干：将振动处理后的无纺布纤维网进入烘箱进行烘干，烘箱温度40-50℃；
S6、加工：将制得的无纺布分成两组，然后将热轧机导热油加热至120-140°，同时将底布铺平，再根据产品的含炭量要求通过炭粉喷撒机均匀喷撒一层80-400目的改性竹炭粉，同时再将植物提取物喷洒一层，然后按炭粉量及炭粉目数调整胶水比例及浓度，通过喷胶机均匀喷洒胶水，然后覆盖上PE高分子防水透气膜，最后覆盖上无纺布，形成松散性复合体，最后再导入热轧机的热轧辊，在导热油和辊压力的作用下热轧为一体，即可制得高透气率无纺布；
S7、包装：然后进行切边，并且在切片后的成品通过收卷机卷取成卷。
4.根据权利要求2所述的一种高透气率无纺布，其特征在于：所述改性聚乙烯醇纤维为氨基甲酰乙基化聚乙烯醇纤维，具体为在含丙烯酰胺32g/L、硫酸钠25％和磷酸氢二钠2％的水溶液中，先在100℃下熟化5min，后于50℃下处理3h，即得所需改性聚乙烯醇纤维。
5.根据权利要求2所述的一种高透气率无纺布，其特征在于：所述芦荟纤维为普通芦荟经脱胶、脱苦、切丝、破碎，经溶液纺丝制得。
6.根据权利要求2所述的一种高透气率无纺布，其特征在于：所述抗氧剂为二烷基二硫代氨基甲酸钼、亚磷酸三丁酯或二烷基二苯胺。
7.根据权利要求2所述的一种高透气率无纺布，其特征在于：所述植物提取物为灯笼果、鼠尾草、茶渣、芦荟、艾蒿、陈皮、五味子、栀子、刺五加、甘草、黄连、大黄、蒲公英、车前子、生姜、大蒜、鱼腥草中的一种或多种的提取物。
8.根据权利要求3所述的一种高透气率无纺布，其特征在于：所述在步骤S2中，纺丝箱体的温度设置为190-210℃。
9.根据权利要求3所述的一种高透气率无纺布，其特征在于：所述在步骤S5中，无纺布纤维网通过烘箱速度为15-20m/min。
10.根据权利要求3所述的一种高透气率无纺布，其特征在于：所述在步骤S7中，切片的大小可根据实际所需大小决定。
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