CN100406533C - 芯层增强型聚乙烯丙纶防水卷材及其生产方法 - Google Patents

芯层增强型聚乙烯丙纶防水卷材及其生产方法 Download PDF

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CN100406533C
CN100406533C CNB2006100422047A CN200610042204A CN100406533C CN 100406533 C CN100406533 C CN 100406533C CN B2006100422047 A CNB2006100422047 A CN B2006100422047A CN 200610042204 A CN200610042204 A CN 200610042204A CN 100406533 C CN100406533 C CN 100406533C
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CN1831077A (zh
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王立华
李卫国
段毅凡
王清标
于波
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Fifth Engineering Co Ltd of China Railway 16th Bureau Group Co Ltd
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Abstract

本申请涉及一种芯层增强型聚乙烯丙纶防水卷材,它包括聚乙烯防水层、纤维网增强层和两边的无纺布层,其特征是聚乙烯防水层有两层,纤维网增强层位于两层聚乙烯防水层中间,纤维网网格的长度和宽度范围均为0.2-2.0cm,其中空部分的面积应占网格总面积的50%以上。本申请可采用熔融流延挤出法生产,用也可采用聚乙烯膜二次加热法生产。通过增强聚乙烯防水芯层,使卷材的抗拉强度大大提高,由于增强纤维网夹在两层聚乙烯膜中间,不影响聚乙烯与无纺布的复合,由于刚挤出的熔融聚乙烯或加热后的聚乙烯模粘度非常大,能将中间的纤维网包复的非常紧密,两层聚乙烯膜的复合也非常好,卷材的其它性能不会下降。

Description

芯层增强型聚乙烯丙纶防水卷材及其生产方法
技术领域
本申请涉及防水卷材,尤其是芯层增强型聚乙烯丙纶防水卷材。
背景技术
聚乙烯丙纶防水卷材是以聚乙烯类合成高分子材料为主防水层与丙纶无纺布经加热复合而成。它由于抗渗能力强,耐腐蚀,表面粗糙,摩擦系数大,可与水泥在凝固过程中直接粘合,施工比较简单而越来越受到消费者的青睐。传统的聚乙烯丙纶防水卷材是由中间的聚乙烯防水膜和两面的无纺布复合而成,但是,由于聚乙烯丙纶防水卷材厚度较小,抗拉强度较小,一般在60-70N/cm左右,随着国家对建筑防水质量要求的提高其使用范围越来越受到限制。这就需要增强型的聚乙烯丙纶防水卷材。
目前市场上也有增强型聚乙烯丙纶防水卷材,比如用玻璃纤维网或钢丝网增强聚乙烯丙纶防水卷材,这种卷材是四层结构(如图1),其强度在一定程度上有所提高,但它们都是在传统聚乙烯丙纶防水卷材的聚乙烯膜和丙纶无纺布之间加一层玻璃纤维网或钢丝网来增加卷材的强度。这样由于玻璃纤维网或钢丝网与无纺布之间是“冷复合”,减少了无纺布与聚乙烯膜的接触面积,使无纺布与聚乙烯膜复合不好,很容易剥离,造成产品质量下降。
中国专利公开号CN1248518公开了一种“金属网增强聚乙烯复合防水卷材”,它是在聚乙烯膜为主防水层的两面复合上纤维层及其特征部分聚乙烯膜内的金属网架共同组成。其优点是抗拉强度大,其不足之处是:由于聚乙烯膜是单层的,纤维网不可能被单层聚乙烯膜完全包覆,总有漏点与外层无纺布接触,这就影响聚乙烯膜与两边无纺布的复合,导致防水卷材的技术性能(剥离强度)大大降低,这在实际生产中是不可取的。
发明内容
本申请的目的是克服现有技术中的不足,提供一种抗拉强度高并且复合效果好的芯层增强型聚乙烯丙纶防水卷材及其生产方法。
本申请防水卷材为五层层状结构,它包括聚乙烯防水层、纤维网增强层和两边的无纺布,其特征是聚乙烯防水层有两层,纤维网增强层位于两层聚乙烯防水层中间,纤维网网格的长度和宽度范围均为0.2-2.0cm,其中空部分的面积应占网格总面积的50%以上,以保证卷材的复合效果。
本申请可采用熔融流延挤出法生产,即用两台挤出机同时挤出两片聚乙烯膜,在两片聚乙烯膜中间加入一层纤维网,同时与最外边的两层无纺布复合,形成五层复合结构。
本申请也可采用聚乙烯膜二次加热法生产防水卷材,即用两台加热机加热两片聚乙烯膜,在中间夹上纤维网,与外边两层无纺布一起复合即可。其产品结构与熔融流延挤出法生产的防水卷材相同。
本申请中的聚乙烯防水膜也可以是其它乙烯类塑料膜;丙纶无纺布也可用涤纶无纺布代替;其中的纤维网可以是玻璃纤维网、钢丝网或者是其它塑料网。
本申请的优点是:(1)通过增强聚乙烯丙纶防水卷材的聚乙烯防水芯层,使卷材的抗拉强度大大提高,提高幅度取决于所选增强纤维的抗拉强度,一般可提高20-200%。(2)增强纤维网夹在两层聚乙烯膜中间,不影响聚乙烯与无纺布的复合,由于两台挤出机刚挤出的熔融聚乙烯或加热后的聚乙烯膜粘度非常大,能将中间的纤维网包复的非常紧密,两层聚乙烯膜的复合也非常好,卷材的其它性能不会下降。
附图说明
图1是现有增强型聚乙烯丙纶防水卷材的断面结构图,为了便于叙述,图中的纤维增强层置于防水层和底层无纺布之间(在实际生产中,纤维增强层也可置于防水层和顶层无纺布之间);图2是本申请芯层增强型聚乙烯丙纶防水卷材的断面结构图。
图中:1-顶层无纺布,2,4-聚乙烯防水层,3-纤维网增强层,5-底层无纺布。
具体实施方式
图1是现有增强型聚乙烯丙纶防水卷材的断面结构图,从图中可以看出,现有的增强型聚乙烯丙纶防水卷材是四层结构,它是在聚乙烯防水层2和下层丙纶无纺布5之间加一层纤维网增强层3,然后再与顶层无纺布1和底层无纺布5复合即可。
图2是本申请芯层增强型聚乙烯丙纶防水卷材的断面结构图,从图中可以看出,它包括顶层无纺布1、底层无纺布5、纤维网增强层3、聚乙烯防水层2和4,纤维网增强层3位于两层聚乙烯防水层2和4中间。
生产时采用熔融流延挤出法,即采用两台挤出机同时挤出两片聚乙烯膜2和4,在两片聚乙烯膜2和4中间加入一层纤维网3,同时与顶层无纺布1、底层无纺布5复合,形成五层复合结构。
也可采用聚乙烯膜二次加热法,用两台加热机加热两片聚乙烯膜2和4,在中间夹上纤维网增强层3,与外边两层无纺布1和5一起复合即可。

Claims (3)

1.一种芯层增强型聚乙烯丙纶防水卷材,它包括聚乙烯防水层、纤维网增强层和两边的无纺布层,其特征是聚乙烯防水层有两层,纤维网增强层位于两层聚乙烯防水层中间,纤维网网格的长度和宽度范围均为0.2-2.0cm,其中空部分的面积应占网格总面积的50%以上。
2.一种生产权利要求1所述的芯层增强型聚乙烯丙纶防水卷材的方法,它采用熔融流延挤出法生产,其特征是用两台挤出机同时挤出两片聚乙烯膜,在两片聚乙烯膜中间加入一层纤维网,同时与最外边的两层无纺布复合即可。
3.一种生产权利要求1所述的芯层增强型聚乙烯丙纶防水卷材的方法,它采用聚乙烯膜二次加热法生产,其特征是用两台加热机加热两片聚乙烯膜,在中间夹上纤维网,与外边两层无纺布一起复合即可。
CNB2006100422047A 2006-01-23 2006-01-23 芯层增强型聚乙烯丙纶防水卷材及其生产方法 Expired - Fee Related CN100406533C (zh)

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CN102225634A (zh) * 2011-04-30 2011-10-26 德州东方土工材料股份有限公司 多向连续增强相防水板及制作方法
CN104960291A (zh) * 2015-07-10 2015-10-07 常熟璟杰无纺制品有限公司 一种复合无纺布
CN113320369A (zh) * 2021-07-07 2021-08-31 马世丰 一种无纺布车衣

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Publication number Priority date Publication date Assignee Title
CN2250371Y (zh) * 1995-09-28 1997-03-26 黑龙江省牡丹江农垦建筑防水材料厂 多功能防水卷材
CN1248518A (zh) * 1998-09-23 2000-03-29 山东矿业学院建筑设计研究院 金属网增强聚乙烯复合防水卷材
CN2377252Y (zh) * 1998-07-29 2000-05-10 吕树盛 一种高分子增强复合防水材料
JP2002337294A (ja) * 2001-05-21 2002-11-27 Toyobo Co Ltd 透湿防水シート及びその製造方法
CN2892469Y (zh) * 2006-01-23 2007-04-25 王立华 芯层增强型聚乙烯丙纶防水卷材

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2250371Y (zh) * 1995-09-28 1997-03-26 黑龙江省牡丹江农垦建筑防水材料厂 多功能防水卷材
CN2377252Y (zh) * 1998-07-29 2000-05-10 吕树盛 一种高分子增强复合防水材料
CN1248518A (zh) * 1998-09-23 2000-03-29 山东矿业学院建筑设计研究院 金属网增强聚乙烯复合防水卷材
JP2002337294A (ja) * 2001-05-21 2002-11-27 Toyobo Co Ltd 透湿防水シート及びその製造方法
CN2892469Y (zh) * 2006-01-23 2007-04-25 王立华 芯层增强型聚乙烯丙纶防水卷材

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