CN106938524A - 一种垃圾填埋场用聚丙烯复合土工布的制备方法 - Google Patents

一种垃圾填埋场用聚丙烯复合土工布的制备方法 Download PDF

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CN106938524A
CN106938524A CN201710127992.8A CN201710127992A CN106938524A CN 106938524 A CN106938524 A CN 106938524A CN 201710127992 A CN201710127992 A CN 201710127992A CN 106938524 A CN106938524 A CN 106938524A
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geotextiles
polypropylene
composite materials
refuse landfill
polypropylene composite
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王先锋
缪东洋
丁彬
俞建勇
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Donghua University
National Dong Hwa University
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Abstract

本发明涉及一种垃圾填埋场用聚丙烯复合土工布的制备方法，包括将等规聚丙烯切片与抗老化剂均匀混合后倒入料仓，送入螺杆挤出机，经熔融、挤压、过滤、计量后，输入纺丝箱体，由喷丝孔喷出，经双侧的侧吹风进行冷却，冷却后的丝束再经管式牵伸器进行气流牵伸，牵伸时丝束经过静电分丝器形成的高压静电场分丝，长丝在侧吹气流控制下均匀铺放在凝网帘上，经预压辊输出至针刺机，形成的长丝纤网经预针刺、主针刺加固后得到聚丙烯纺粘针刺土工布；预烘干后进行单面烧毛；采用熔融流延复合方法或层压法在经烧毛处理后的聚丙烯纺粘针刺土工布的未烧毛一面复合一层防渗土工膜。本发明提高了土工布的防渗性能，同时增加土工膜的抗拉强度和抗穿刺能力。

Description

一种垃圾填埋场用聚丙烯复合土工布的制备方法
技术领域
本发明属于土工布技术领域，特别涉及一种垃圾填埋场用高强粗旦聚丙烯复合土工布的制备方法，所制得的复合土工布具有抗老化、耐酸碱和强度高等优点，达到了实际使用的要求。
背景技术
聚丙烯纺粘法针刺非织造土工布具有强度高、耐酸碱、耐腐蚀、耐霉变、耐低温等优点，具有较好的芯吸效应和排水性能，且比重轻，价格便宜，使得聚丙烯纺粘法针刺土工布在土木工程领域获得广泛应用，尤其是在地下耐酸碱环境下和高寒等恶劣环境中具有不可替代的关键地位。根据聚丙烯纺粘法针刺非织造土工布的特性，其应用领域主要包括：防渗工程、粉煤灰堆场、尾矿库堆场、矿山堆浸场和高铁无砟轨道滑动层等。
复合土工布为以防渗土工膜作为防渗基材，与非织造土工布布复合而成的土工防渗材料，它的防渗性能主要取决于土工膜的防渗性能。将土工布与防渗土工膜结合后，不仅增大了土工膜的抗拉强度和抗穿刺能力，而且由于土工布表面粗糙，增大了接触面的摩擦系数，有利于复合土工布及保护层的稳定。同时，它们对细菌和化学作用有较好的耐侵蚀性，不怕酸、碱、盐类的侵蚀，在避光使用情况下，使用寿命长。
发明内容
本发明的目的在于提供一种垃圾填埋场用高强粗旦聚丙烯复合土工布的制备方法，通过该方法制备的复合土工布具有抗老化、耐酸碱和强度高等优点。
为了达到上述目的，本发明采用了如下技术方案：
一种垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，包括：
第一步：将等规聚丙烯切片与抗老化剂和降温母粒均匀混合后倒入料仓，送入螺杆挤出机，经熔融、挤压、过滤、计量后，输入纺丝箱体，由纺丝箱体的喷丝孔喷出形成细流，经双侧的侧吹风进行冷却，冷却后的丝束再经管式牵伸器进行气流牵伸，牵伸时丝束经过静电分丝器形成的高压静电场，长丝表面因带同种电荷而相互排斥，达到均匀分丝，长丝在侧吹气流控制下均匀铺放在凝网帘上，经预压辊输出至针刺机，形成的长丝纤网经预针刺、主针刺加固后得到聚丙烯纺粘针刺土工布；
第二步：将上述聚丙烯纺粘针刺土工布预烘干后进行单面烧毛；
第三步：采用熔融流延复合方法或层压法在经烧毛处理后的聚丙烯纺粘针刺土工布的未烧毛一面复合一层防渗土工膜，得到垃圾填埋场用聚丙烯复合土工布。
优选地，所述的熔融流延复合方法包括将热塑性树脂经挤出机熔融塑化，通过狭缝机头熔融挤出，熔体与聚丙烯纺粘针刺土工布经橡胶辊压合，并经冷却定型制得垃圾填埋场用聚丙烯复合土工布；所述层压法包括将防渗土工膜经烘箱远红外加热，把聚丙烯纺粘针刺土工布和防渗土工膜经导辊压到一起形成垃圾填埋场用聚丙烯复合土工布。
优选地，所述的第一步中的等规聚丙烯的熔融指数为20～60g/10min，重均分子量为10～30W。
优选地，所述的第一步中的抗老化剂为二苯甲酮类紫外线吸收剂、受阻胺类光稳定剂、抗氧剂1098或抗氧剂168中的一种或多种的复配使用。
优选地，所述第一步中的降温母粒为A-490型PP降温母粒，加入的质量分数为1～4％。
优选地，所述的第一步中的螺杆挤出机分为三段，包括进料段、熔融段和均化段，各段的温度分别为180～210℃，210～250℃，200～220℃，温度由低→高→较高，以保证聚合物均匀熔融混合。
优选地，所述的第一步中的纺丝箱体温度为220～240℃，熔体温度为220～230℃，熔体压力为8～11MPa，纺丝箱体上安装有熔体压力传感器以测量熔体压力，并要求熔体压力波动≤0.1MPa。
优选地，所述的第一步中的冷却用侧吹风风速为1～2m/s，温度为10～30℃，吹风湿度为50～80％。
优选地，所述的第一步中的气流牵伸所用牵伸压力为0.4～0.8MPa，牵伸速度为3000～6000m/min。
优选地，所述的第一步中的静电分丝器电压为20～50kV，电流为1mA，放电针板与接地辊间距50～150mm。
优选地，所述的第一步中的铺网速度为4～16m/s。
优选地，所述的第一步中制得的聚丙烯纺粘针刺土工布的单丝纤度为5～12dtex，克重为100～1000g/m2，纵/横向断裂强度≥70N·m-1/gsm。
优选地，所述的第一步中制得的聚丙烯纺粘针刺土工布的的使用寿命达30～50年。
优选地，所述的第二步中的单面烧毛的火焰温度为700～1100℃，烧毛机车速为100～140m/min。
优选地，所述的第三步中的防渗土工膜的厚度为0.1～1.5mm。
优选地，所述的第三步中的热塑性树脂为聚氯乙烯(PVC)、聚乙烯(PE)和乙烯/醋酸乙烯共聚物(EVA)中的一种或几种。
优选地，所述的第三步中的垃圾填埋场用聚丙烯复合土工布包括一层聚丙烯纺粘针刺土工布和一层防渗土工膜，两层聚丙烯纺粘针刺土工布和一层防渗土工膜，两层聚丙烯纺粘针刺土工布和两层防渗土工膜，或多层聚丙烯纺粘针刺土工布和多层防渗土工膜。
与现有技术相比，本发明的有益效果是：
(1)本发明的复合土工布采用的是以高强粗旦聚丙烯纺粘针刺非织造材料为基材，聚丙烯纺粘法针刺非织造土工布具有强度高、耐酸碱、耐腐蚀、耐霉变、耐低温等优点，具有较好的芯吸效应和排水性能，且比重轻，价格便宜，可适用于地下耐酸碱环境和高寒等恶劣环境，将其与防渗土工膜进行复合，还可以增加土工膜的抗拉强度和抗穿刺能力；
(2)本发明的复合土工布采用了烧毛工艺，对聚丙烯纺粘针刺土工布进行了单面烧毛，经烧毛后的土工布表面平整，不易滑动；铺设时将表面经烧毛处理后的一面朝上，增加面层结合力，防止施工时被车轮卷起、破坏，易施工、应用效果好，提高了工程使用寿命。
(3)本发明的复合土工布克重为100～1000g/m2，纵/横向拉伸强度≥70N·m-1/gsm，抗酸碱性断裂强度保持率≥90％，使用寿命达到了工程设计的要求30～50年。
(4)本发明通过引入气流牵伸以及静电分丝技术解决粗旦聚丙烯长丝铺网不均匀的问题，提高土工布材料的各向同性程度，并将其与土工膜进行复合，提高土工布的防渗性能，同时增加土工膜的抗拉强度和抗穿刺能力。
附图说明
图1为实施例1中的聚丙烯复合土工布的结构示意图；
图2为实施例2中的聚丙烯复合土工布的结构示意图；
图3为实施例3中的聚丙烯复合土工布的结构示意图。
具体实施方式
为使本发明更明显易懂，兹以优选实施例，并配合附图作详细说明如下。应理解，这些实施例仅用于说明本发明而不用于限制本发明的范围。此外应理解，在阅读了本发明讲授的内容之后，本领域技术人员可以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。
实施例1～3中所用的等规聚丙烯的熔融指数为20～60g/10min，重均分子量为10～30W；二苯甲酮类紫外线吸收剂C81和受阻胺类光稳定剂Tinuvin770均购自德国巴斯夫股份公司；抗氧剂1098和抗氧剂168均购自韩国松原；A-490型PP降温母粒购自深圳金大全科技有限公司；高密度聚乙烯NG6997购自美国陶氏化学。
实施例1
如图1所示，一种垃圾填埋场用聚丙烯复合土工布由一层聚丙烯纺粘针刺土工布1和一层防渗土工膜2组成，其制备方法为：
第一步：采用纺粘针刺加固工艺制备高强粗旦聚丙烯土工布，所用聚合物为高熔融指数等规聚丙烯，其熔融指数为30g/10min，重均分子量为20W；原料组分以重量分数记，高熔融指数等规聚丙烯切片100份，抗氧剂2份、受阻胺类光稳定剂Tinuvin7700.4份、二苯甲酮类紫外线吸收剂C810.6份、PP降温母粒A-4903份，其中抗氧剂为抗氧剂1010与抗氧剂168复配制得，复配比例为5∶5；将原料均匀混合后倒入料仓，送入螺杆挤出机，螺杆挤出机分为三段，包括进料段、熔融段和均化段，各段的温度分别为180℃，220℃，200℃，温度由低→高→较高，以保证聚合物均匀熔融混合，经熔融、挤压、过滤、计量后，输入纺丝箱体，纺丝箱体温度为220℃，熔体温度为220℃，熔体压力为8MPa，纺丝箱体上安装有熔体压力传感器以测量熔体压力，并要求熔体压力波动≤0.1MPa，由纺丝箱体的喷丝孔喷出，经双侧的侧吹风进行冷却，风速设定在1.5m/s，冷却风温度15℃，吹风湿度为75％，冷却后的丝束再经管式牵伸器进行气流牵伸，牵伸压力为0.6MPa，牵伸速度为4000m/min，牵伸时丝束经过静电分丝器形成的高压静电场，长丝表面因带同种电荷而相互排斥，达到均匀分丝，静电分丝器电压为50kV，电流为1mA，放电针板与接地辊间距100mm，长丝在侧吹气流控制下均匀铺放在凝网帘上，铺网速度为8m/s，经预压辊输出至针刺机，预压辊压力为2.5kPa，温度为80℃。形成的长丝纤网经一台预针刺机进行预针刺。预针刺机配备一块上刺单针板，值针密度为5000枚/m，针刺频率为500次/min。再经三台主针刺机进行加固，第一台为上刺单针板，值针密度为6000枚/m，针刺频率为500次/min；第二台为下刺双针板，值针密度分别为6800、6600枚/m，针刺频率为800次/min；第三台为上刺双针板，值针密度分别为6800、6600枚/m，针刺频率为800次/min。加固后制得的高强粗旦聚丙烯纺粘针刺土工布的单丝纤度为8dtex，克重为300g/m2，纵/横向断裂强度为75N·m-1/gsm。
第二步：将上述聚丙烯纺粘针刺土工布经130℃预烘干后进行单面烧毛，火焰温度为750℃，烧毛机车速为110m/min。
第三步：采用熔融流延复合方法在经烧毛处理后的聚丙烯纺粘针刺土工布的未烧毛一面复合一层厚度为1mm的防渗土工膜，即将高密度聚乙烯NG6997经挤出机熔融塑化，通过狭缝机头熔融挤出，熔体温度为210℃，熔体压力为10MPa，熔体与聚丙烯纺粘针刺土工布经橡胶辊压合压力为4kPa，并经30℃冷却定型制得垃圾填埋场用聚丙烯复合土工布。制得复合土工布克重为400g/m2，断裂强度为75N·m-1/gsm，垂直渗透系数为k＝1×10-12cm/s，耐静水压1.2MPa。
实施例2
如图2所示，一种垃圾填埋场用聚丙烯复合土工布由两层聚丙烯纺粘针刺土工布1和一层防渗土工膜2组成，其制备方法为：
第一步：采用纺粘针刺加固工艺制备高强粗旦聚丙烯土工布，所用聚合物为高熔融指数等规聚丙烯，其熔融指数为40g/10min，重均分子量为15W；原料组分以重量分数记，高熔融指数等规聚丙烯切片100份，抗氧剂1.5份、受阻胺类光稳定剂Tinuvin770 0.3份、二苯甲酮类紫外线吸收剂C81 0.7份、PP降温母粒A-490 4份，其中抗氧剂为抗氧剂1010与抗氧剂168复配制得，复配比例为6∶4；将原料均匀混合后倒入料仓，送入螺杆挤出机，螺杆挤出机分为三段，包括进料段、熔融段和均化段，各段的温度分别为190℃，220℃，200℃，温度由低→高→较高，以保证聚合物均匀熔融混合，经熔融、挤压、过滤、计量后，输入纺丝箱体，纺丝箱体温度为220℃，熔体温度为220℃，熔体压力为10MPa，纺丝箱体上安装有熔体压力传感器以测量熔体压力，并要求熔体压力波动≤0.1MPa，由纺丝箱体的喷丝孔喷出，经双侧的侧吹风进行冷却，风速设定在1.2m/s，冷却风温度15℃，吹风湿度为70％，冷却后的丝束再经管式牵伸器进行气流牵伸，牵伸压力为0.6MPa，牵伸速度为4500m/min，牵伸时丝束经过静电分丝器形成的高压静电场，长丝表面因带同种电荷而相互排斥，达到均匀分丝，静电分丝器电压为30kV，电流为1mA，放电针板与接地辊间距75mm，长丝在侧吹气流控制下均匀铺放在凝网帘上，铺网速度为10m/s，经预压辊输出至针刺机，预压辊压力为2.5kPa，温度为80℃。形成的长丝纤网然后经一台预针刺机进行预针刺。预针刺机配备一块上刺单针板，值针密度为4500枚/m，针刺频率为600次/min。再经三台主针刺机进行加固，第一台为上刺单针板，值针密度为6000枚/m，针刺频率为600次/min；第二台为下刺双针板，值针密度分别为6800、6600枚/m，针刺频率为800次/min；第三台为上刺双针板，值针密度分别为6800、6600枚/m，针刺频率为800次/min。加固后制得的高强粗旦聚丙烯纺粘针刺土工布的单丝纤度为9dtex，克重为400g/m2，纵/横向断裂强度为75N·m-1/gsm。
第二步：将上述聚丙烯纺粘针刺土工布130℃预烘干后进行单面烧毛，火焰温度为900℃，烧毛机车速为130m/min。
第三步：采用层压法在两层已经过烧毛处理的聚丙烯纺粘针刺土工布的未烧毛一面中间复合一层厚度为1.5mm的聚氯乙烯防渗土工膜，所述层压法即将现有已制备好的聚氯乙烯防渗土工膜经烘箱远红外加热到150℃，把土工布和土工膜经导辊压到一起形成复合土工膜，导辊压力为2kPa。制得复合土工布克重为900g/m2，断裂强度为85N·m-1/gsm，垂直渗透系数为k＝1×10-12cm/s，耐静水压1.7MPa。
实施例3
如图3所示，一种垃圾填埋场用聚丙烯复合土工布由三层聚丙烯纺粘针刺土工布1和两层防渗土工膜2组成，其制备方法为：
第一步：采用纺粘针刺加固工艺制备高强粗旦聚丙烯土工布，所用聚合物为高熔融指数等规聚丙烯，其熔融指数为50g/10min，重均分子量为10W；原料组分以重量分数记，高熔融指数等规聚丙烯切片100份，抗氧剂2.5份、受阻胺类光稳定剂Tinuvin770 0.6份、二苯甲酮类紫外线吸收剂C81 0.4份、PP降温母粒A-490 3份，其中抗氧剂为抗氧剂1010与抗氧剂168复配制得，复配比例为4∶6；将原料均匀混合后倒入料仓，送入螺杆挤出机，螺杆挤出机分为三段，包括进料段、熔融段和均化段，各段的温度分别为200℃，230℃，220℃，温度由低→高→较高，以保证聚合物均匀熔融混合，经熔融、挤压、过滤、计量后，输入纺丝箱体，纺丝箱体温度为220℃，熔体温度为220℃，熔体压力为11MPa，纺丝箱体上安装有熔体压力传感器以测量熔体压力，并要求熔体压力波动≤0.1MPa，由纺丝箱体的喷丝孔喷出，经双侧的侧吹风进行冷却，风速设定在1.5m/s，冷却风温度15℃，吹风湿度为80％，冷却后的丝束再经管式牵伸器进行气流牵伸，牵伸压力为0.6MPa，牵伸速度为3500m/min，牵伸时丝束经过静电分丝器形成的高压静电场，长丝表面因带同种电荷而相互排斥，达到均匀分丝，静电分丝器电压为40kV，电流为1mA，放电针板与接地辊间距50mm，长丝在侧吹气流控制下均匀铺放在凝网帘上，铺网速度为15m/s，经预压辊输出至针刺机，预压辊压力为1.5kPa，温度为80℃。形成的长丝纤网然后经一台预针刺机进行预针刺。预针刺机配备一块上刺单针板，值针密度为4000枚/m，针刺频率为500次/min。再经三台主针刺机进行加固，第一台为上刺单针板，值针密度为5000枚/m，针刺频率为600次/min；第二台为下刺双针板，值针密度分别为6800、6600枚/m，针刺频率为800次/min；第三台为上刺双针板，值针密度分别为6800、6600枚/m，针刺频率为800次/min。加固后制得的高强粗旦聚丙烯纺粘针刺土工布的单丝纤度为11dtex，克重为500g/m2，纵/横向断裂强度为70N·m-1/gsm。
第二步：将上述聚丙烯纺粘针刺土工布130℃预烘干后进行单面烧毛，火焰温度为800℃，烧毛机车速为140m/min。
第三步：采用层压法在三层已经过烧毛处理的聚丙烯纺粘针刺土工布中间复合二层厚度为1mm的乙烯/醋酸乙烯共聚物防渗土工膜，所述层压法即将现有已制备好的聚氯乙烯防渗土工膜经烘箱远红外加热到150℃，把土工布和土工膜经导辊复合到一起形成复合土工膜，橡胶辊压力为4kPa。复合土工布的结构由上至下分别为土工布→土工膜→土工布→土工膜→土工布。制得复合土工布克重为1200g/m2，断裂强度为80N·m-1/gsm，垂直渗透系数为k＝1×10-15cm/s，耐静水压2.3MPa。

Claims (10)

1.一种垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，包括：
第一步：将等规聚丙烯切片与抗老化剂、降温母粒均匀混合后倒入料仓，送入螺杆挤出机，经熔融、挤压、过滤、计量后，输入纺丝箱体，由纺丝箱体的喷丝孔喷出，经双侧的侧吹风进行冷却，冷却后的丝束再经管式牵伸器进行气流牵伸，牵伸时丝束经过静电分丝器形成的高压静电场，长丝表面因带同种电荷而相互排斥，达到均匀分丝，长丝在侧吹气流控制下均匀铺放在凝网帘上，经预压辊输出至针刺机，形成的长丝纤网经预针刺、主针刺加固后得到聚丙烯纺粘针刺土工布；
第二步：将上述聚丙烯纺粘针刺土工布预烘干后进行单面烧毛；
第三步：采用熔融流延复合方法或层压法在经烧毛处理后的聚丙烯纺粘针刺土工布的未烧毛一面复合一层防渗土工膜，得到垃圾填埋场用聚丙烯复合土工布；所述熔融流延复合方法包括将热塑性树脂经挤出机熔融塑化，通过狭缝机头熔融挤出，熔体与聚丙烯纺粘针刺土工布经橡胶辊压合，并经冷却定型制得垃圾填埋场用聚丙烯复合土工布；所述层压法包括将防渗土工膜经烘箱远红外加热，把聚丙烯纺粘针刺土工布和防渗土工膜经导辊压到一起形成垃圾填埋场用聚丙烯复合土工布。
2.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中的等规聚丙烯的熔融指数为20～60g/10min，重均分子量为10～30W。
3.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中的抗老化剂为二苯甲酮类紫外线吸收剂、受阻胺类光稳定剂、抗氧剂1098或抗氧剂168中的一种或多种的复配使用。
4.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述第一步中降温母粒为A-490型PP降温母粒，加入的质量分数为1～4％。
5.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中的螺杆挤出机分为三段，包括进料段、熔融段和均化段，各段的温度分别为180～210℃，210～250℃，200～220℃，温度由低→高→较高，以保证聚合物均匀熔融混合，纺丝箱体温度为220～240℃，熔体温度为220～230℃，熔体压力为8～11MPa，纺丝箱体上安装有熔体压力传感器以测量熔体压力，并要求熔体压力波动≤0.1MPa。
6.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中的气流牵伸所用牵伸压力为0.4～0.8MPa，牵伸速度为3000～6000m/min。
7.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中的静电分丝器电压为20～50kV，电流为1mA，放电针板与接地辊间距50～150mm。
8.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中的铺网速度为4～16m/s。
9.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第一步中制得的聚丙烯纺粘针刺土工布的单丝纤度为5～12dtex，克重为100～1000g/m2，纵/横向断裂强度≥70N·m-1/gsm。
10.如权利要求1所述的垃圾填埋场用聚丙烯复合土工布的制备方法，其特征在于，所述的第二步中的单面烧毛的火焰温度为700～1100℃，烧毛机车速为100～140m/min。
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CN109295610A (zh) * 2017-07-24 2019-02-01 无锡市振基土工材料有限公司 一种烧毛土工布及其制备方法
CN108559171A (zh) * 2017-12-12 2018-09-21 王敏 一种抗老化土工布的制备方法
CN108754644B (zh) * 2018-06-29 2020-06-12 东华大学 一种高强粗旦聚丙烯纺粘长丝及其制备方法
CN108754644A (zh) * 2018-06-29 2018-11-06 东华大学 一种高强粗旦聚丙烯纺粘长丝及其制备方法
CN109811419B (zh) * 2019-01-31 2021-09-03 天鼎丰聚丙烯材料技术有限公司 一种防水防裂基布及其制造方法
CN109811419A (zh) * 2019-01-31 2019-05-28 天鼎丰聚丙烯材料技术有限公司 一种防水防裂基布及其制造方法
CN110172783A (zh) * 2019-06-11 2019-08-27 安徽裕宝滤材有限公司 一种无菌防腐带式无纺布及其制造方法
CN112226830A (zh) * 2020-09-17 2021-01-15 滁州兴邦聚合彩纤有限公司 一种弹性纤维的生产方法
CN112680876A (zh) * 2020-12-11 2021-04-20 厦门保瑞达环保科技有限公司 一种高精度塑化型丙纶毡的制作方法
CN112680876B (zh) * 2020-12-11 2022-06-14 厦门保瑞达环保科技有限公司 一种高精度塑化型丙纶毡的制作方法
CN112829408A (zh) * 2021-01-14 2021-05-25 马鞍山市鑫程纳米新材料科技有限公司 一种高强度抗老化防淤堵加筋复合土工布的制备方法
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