CN103807519B - 耐高压多元pe塑料复合管及其生产方法 - Google Patents
耐高压多元pe塑料复合管及其生产方法 Download PDFInfo
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Abstract
一种耐高压多元PE塑料复合管，所述水管最里层为UHMWPE芯管，所述UHMWPE芯管外包裹有第一不锈钢网层，第一不锈钢网层外包裹有PE中间结合层，所述PE中间结合层外壁上包裹有第二不锈钢网层，第二不锈钢网层外包裹有HDPE耐候层。本发明具有高性能、高适用性、结合强度高、无毒无刺激、耐腐蚀等特点。其UHMWPE芯管具有良好的耐磨性、耐冲击性，在同等负荷的条件下，该管的耐磨性甚至比钢管还要好，在所有工程塑料中名列前茅。其第一、第二不锈钢网层能够进一步增加UHMWPE芯管耐压强度，促使高强度UHMWPE芯管不易发生破裂，同时具有良好的抗冲击性能，应用时只需要较薄的管壁就可以满足要求。
Description
技术领域
本发明涉及一种塑料复合管，特别涉及一种耐高压多元PE塑料复合管及其生产方法。
背景技术
给排水管广泛用于公路、铁路路基、地铁工程、废弃物填埋场、隧道、绿化带、运动场等给排水领域，以及农业、园艺之地下灌溉和排水系统。传统金属给排水管因为长埋地下，特别容易腐蚀生锈，甚至造成穿孔、堵塞等严重问题。目前，钢塑复合管发展很快，它正在各个领域中不断的取代各种金属管材和其它传统材料的管道。如中国专利公开了一种钢塑多元复合管材的生产方法（专利申请号201110197543.3），该发明首先将HDPE或PVC塑料改性并将其制成塑料板带；制作两侧边内凹并相互搭接的中空加强筋；用连续焊接设备将加强筋底部内凹处的槽口焊接；将焊接后的加强筋与塑料板带同步缠绕形成管内壁；在缠绕成型的管壁上覆胶、滚压；在滚压后的管壁上包覆纤维网或缠绕纤维带并滚压；在纤维层上覆胶并滚压,形成管外壁；将完成第七步骤的管材定长切割；将切割后管材一端的加强筋端口密封,用注浆设备往管材另一端的方型加强筋内注入预先制备好的水泥浆料；第十步骤:将加注水泥浆料的管材立向竖起、固定,使水泥浆料凝固，形成成品管材。本方案的优点在于能够抗内压、抗外压、防破裂、且减少管材热胀冷缩系数，同时防止加强筋生锈。此专利工艺制作太过繁琐，需要采用将HDPE或PVC塑料、水泥浆料复合，这一方面增加了生产难度，另一方面又直接影响管道之间的复合牢固，甚至造成管道破裂。
发明内容
本发明的目的是要提供一种耐高压多元PE塑料复合管及其生产方法，以解决现有复合管抗冲击性能差、耐压强度不高等技术问题。
为解决上述技术问题，本发明的技术方案是：一种耐高压多元PE塑料复合管，所述水管最里层为UHMWPE芯管，所述UHMWPE芯管外包裹有第一不锈钢网层，第一不锈钢网层外包裹有HDPE中间结合层，所述HDPE中间结合层外壁上包裹有第二不锈钢网层，第二不锈钢网层外包裹有HDPE耐候层。
作为优选，所述UHMWPE芯管由以下组分按重量比制成：UHMWPE树脂50份、SBS苯乙烯类热塑性弹性体3～8份。
作为优选，所述PE中间结合层由以下组分按重量比制成：PE树脂50份，山梨醇0.2～1.1份，聚乙烯辛烯共弹性体（简称POE）3～8份。
作为优选，所述HDPE耐候层主要由以下组分按重量比制成：HDPE树脂80～85份、复合填充剂7～13份、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯0.3～0.5份、邻羟基苯甲酸苯酯 0.3～0.5份、聚乙烯蜡 0.2～0.3份。
作为优选，所述复合填充剂由以下组分按重量比制成：云母粉20%，硫酸钙晶须35%，纳米二氧化钛15%、硼酸铝晶须30%。
一种制备上述耐高压HDPE多元复合管的生产方法，该方法包括以下步骤：A.按重量比将UHMWPE树脂、SBS苯乙烯类热塑性弹性体混合后投入第一台挤塑机料斗内；按重量比将PE树脂（高密度聚乙烯）、山梨醇、聚乙烯辛烯共弹性体（简称POE）投入第二挤塑机料斗；按重量比将HDPE树脂、复合填充剂、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯、邻羟基苯甲酸苯酯、聚乙烯蜡混合后投入第三挤塑机料斗内；
B.生产时，第一挤塑机将UHMWPE芯管挤出，挤出后的UHMWPE芯管经过水冷和定径后，不锈钢丝分别从左右两边以左旋右旋的方式缠绕在UHMWPE芯管上，缠绕的角度为50度，使得管材轴向和环向均匀受力，形成为第一不锈钢网层；
C.在UHMWPE芯管上缠绕后经过加热，HDPE中间结合层由第二挤塑机挤出将UHMWPE芯管包裹，挤出后的HDPE中间结合层经过水冷和定径后，不锈钢丝分别从左右两边以左旋右旋的方式缠绕在HDPE中间结合层上，缠绕的角度为50度，使得管材轴向和环向均匀受力，形成为第二不锈钢网层；
D.在HDPE中间结合层2上缠绕第二不锈钢网层后，经过加热，由第三挤塑机挤出HDPE耐候层1包裹，保证高强度钢丝与内外层塑料之间热熔粘为一体，经冷却定型便成为耐高压多元PE塑料复合管。
本发明具有高性能、高适用性、结合强度高、无毒无刺激、耐腐蚀等特点。其UHMWPE芯管具有良好的耐磨性、耐冲击性，在同等负荷的条件下，该管的耐磨性比钢管还要好，在所有工程塑料中名列前茅。其第一、第二不锈钢网层能够进一步增加UHMWPE芯管耐压强度，促使高强度UHMWPE芯管不易发生破裂，同时具有良好的抗冲击性能，应用时只需要较薄的管壁就可以满足要求。PE结合层采用热塑性弹性体，提高了芯管与外层的结合能力，其使用寿命可达60年。
附图说明
图1是本发明的结构示意图；
图2是本发明剖视图。
具体实施方式
下面结合附图和具体实施方式，对本发明的技术方案作进一步具体的说明。
图1是本发明的结构示意图；图2是本发明结构剖视图。由图1结合图2可知，该耐高压多元PE塑料复合管主要由HDPE耐候层1、HDPE中间结合层2、第一不锈钢网层3、第二不锈钢网层31、UHMWPE芯管5等构成。以下是耐高压多元PE塑料复合管制造中的几个实例。
实施例1：按重量比将UHMWPE树脂50份、SBS苯乙烯类热塑性弹性体5份混合后投入第一台挤塑机料斗内；按重量比将PE树脂（高密度聚乙烯）50份、山梨醇0.2份、聚乙烯辛烯共弹性体（简称POE）5份投入第二挤塑机料斗；按重量比将HDPE树脂80份、复合填充剂（云母粉20%，硫酸钙晶须35%，纳米二氧化钛15%、硼酸铝晶须30%）13份、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯0.3～0.5份、邻羟基苯甲酸苯酯 0.5份、聚乙烯蜡 0.3份混合后投入第三挤塑机料斗内；生产时，第一挤塑机将UHMWPE芯管5挤出，挤出后的UHMWPE芯管5经过水冷和定径后，不锈钢丝分别从左右两边以左旋右旋的方式缠绕在UHMWPE芯管5上，缠绕的角度为50度，使得管材轴向和环向均匀受力，形成为第一不锈钢网层3。在UHMWPE芯管5上缠绕后经过加热，HDPE中间结合层2由第二挤塑机挤出将UHMWPE芯管5包裹，挤出后的HDPE中间结合层2经过水冷和定径后，不锈钢丝分别从左右两边以左旋右旋的方式缠绕在HDPE中间结合层2上，缠绕的角度为50度，使得管材轴向和环向均匀受力，形成为第二不锈钢网层31；在HDPE中间结合层2上缠绕后，经过加热，由第三挤塑机挤出HDPE耐候层1包裹。保证高强度钢丝与内外层塑料之间热熔粘为一体，经冷却定型便成为耐高压多元PE塑料复合管。
实施例2：按重量比将UHMWPE树脂50份、SBS苯乙烯类热塑性弹性体3份混合后投入第一台挤塑机料斗内；按重量比将HDPE树脂（高密度聚乙烯）50份、山梨醇0.7份、聚乙烯辛烯共弹性体（简称POE）3份投入第二挤塑机料斗内；按重量比将HDPE树脂80～85份、复合填充剂（云母粉20%，硫酸钙晶须35%，纳米二氧化钛15%、硼酸铝晶须30%）7份、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯0.3份、邻羟基苯甲酸苯酯 0.4份、聚乙烯蜡 0.2份混合后投入第三挤塑机料斗内；生产方式同上。
实施例3：按重量比将UHMWPE树脂50份、SBS苯乙烯类热塑性弹性体8份混合后投入第一台挤塑机料斗内；按重量比将HDPE树脂（高密度聚乙烯）50份、山梨醇1.1份、聚乙烯辛烯共弹性体（简称POE）8份投入第二挤塑机料斗内；按重量比将HDPE树脂82份、复合填充剂（云母粉20%，硫酸钙晶须35%，纳米二氧化钛15%、硼酸铝晶须30%）10份、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯0.4份、邻羟基苯甲酸苯酯0.5份、聚乙烯蜡0.3份混合后投入第三挤塑机料斗内；生产方式同上。
其中四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯（抗氧剂1010）具有抗氧化作用。邻羟基苯甲酸苯酯具有抗紫外线作用。聚乙烯蜡具有均匀分散各填充物的作用。
由于HDPE中间结合层中加了聚乙烯辛烯共弹性体。弹性体对多层聚乙烯有良好的结合作用，与山梨醇协同作用，可以有效的提高制品的韧性和刚性、热变形温度、尺寸稳定性。使得本发明的复合结构具有良好强度、耐磨性能。
为了验证本发明的效果，将实施例1-3比其它同类产品进行对比，具体如下表所示。
表1：两种水管之间的对比实验结果
验证结果表明：相比其它同类产品，采用本发明制备的HDPE管材，具有更好的力学性能。
最后，应当指出，以上具体实施方式仅是本发明较有代表性的例子。显然，本发明不限于上述具体实施方式。凡是依据本发明的技术实质对以上具体实施方式所作的任何简单修改、等同变化与修饰，均应认为属于本发明的保护范围。
Claims (3)
1.一种耐高压多元PE塑料复合管，其特征是，所述复合管最里层为UHMWPE芯管，所述UHMWPE芯管外包裹有第一不锈钢网层，第一不锈钢网层外包裹有HDPE中间结合层，所述HDPE中间结合层外壁上包裹有第二不锈钢网层，第二不锈钢网层外包裹有HDPE耐候层；所述UHMWPE芯管由以下组分按重量比制成：UHMWPE树脂50份、SBS苯乙烯类热塑性弹性体3～8份；所述HDPE中间结合层由以下组分按重量比制成：HDPE树脂50份，山梨醇0.2～1.1份，聚乙烯辛烯共弹性体3～8份；所述HDPE耐候层主要由以下组分按重量比制成：HDPE树脂80～85份、复合填充剂7～13份、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯0.3～0.5份、邻羟基苯甲酸苯酯 0.3～0.5份、聚乙烯蜡 0.2～0.3份。
2.根据权利要求1所述的耐高压多元PE塑料复合管，其特征是，所述复合填充剂由以下组分按重量比制成：云母粉20%，硫酸钙晶须35%，纳米二氧化钛15%、硼酸铝晶须30%。
3.一种制备权利要求1所述的耐高压多元PE塑料复合管的生产方法，其特征是，该方法包括以下步骤：A.按重量比将UHMWPE树脂、SBS苯乙烯类热塑性弹性体混合后投入第一台挤塑机料斗内；按重量比将HDPE树脂、山梨醇、聚乙烯辛烯共弹性体投入第二挤塑机料斗；按重量比将HDPE树脂、复合填充剂、四[β-（3，5-二叔丁基-4-羟基苯基）丙酸]季戊四醇酯、邻羟基苯甲酸苯酯、聚乙烯蜡混合后投入第三挤塑机料斗内；
B.生产时，第一挤塑机将UHMWPE芯管挤出，挤出后的UHMWPE芯管经过水冷和定径后，不锈钢丝分别从左右两边以左旋右旋的方式缠绕在UHMWPE芯管上，缠绕的角度为50度，使得管材轴向和环向均匀受力，形成为第一不锈钢网层；
C.在UHMWPE芯管上缠绕第一不锈钢网层后经过加热，HDPE中间结合层由第二挤塑机挤出将UHMWPE芯管包裹，挤出后的HDPE中间结合层经过水冷和定径后，不锈钢丝分别从左右两边以左旋右旋的方式缠绕在HDPE中间结合层上，缠绕的角度为50度，使得管材轴向和环向均匀受力，形成为第二不锈钢网层；
D.在HDPE中间结合层上缠绕第二不锈钢网层后，经过加热，由第三挤塑机挤出HDPE耐候层包裹，保证高强度不锈钢丝与HDPE中间结合层以及HDPE耐候层之间热熔粘为一体，经冷却定型便成为耐高压多元PE塑料复合管。
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