CN112625323A - 一种制作给水用聚乙烯管道的合金材料及制备方法 - Google Patents
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Abstract
本发明公开了一种给水用聚乙烯管道的合金材料及制备方法,其用料组分按百分比计占比如下:
Description
技术领域
本发明是涉及一种聚烯烃材料应用于给排水管网工程的管材,特别是涉及一种给水用聚乙烯管道的合金材料及制备方法。
背景技术
现阶段国内管业企业制作加工的给水用聚乙烯(PE)管道均采用PE100s或PE80s与黑色母共混挤出加工。未结合国家质量标准和使用技术条件对优选配料和匹配工艺做深加工增值处理。不利于管材在高温条件下使用或发生点载荷情况下仍保持耐慢速裂纹增长的力学性能,以及提高输送流量、防止水质污染、延长使用寿命等。
发明内容
鉴于背景技术中存在的技术问题,本发明提供一种给水用聚乙烯管道的合金材料及制备方法。针对管材技术指标要求和使用条件需要做优化用料配置、匹配制作工艺和深加工增值处理,提高了管材的理化性能、成品率及长期稳定性。
本发明技术方案是:一种给水用聚乙烯管道的合金材料,其用料组分按百分比计占比如下:
按上述制作给水用聚乙烯管道合金材料的用料组分,其制备方法和产品包括以下工艺流程:
原料配方→高温混合→(60—70℃/10min)→冷却分散→(10—20℃/10min)→存入料筒
混合配料→挤出塑化→口模定径→冷却定型→标识喷码→同步牵引→定尺切割→检验包装
熔体温度190-200℃、冷却水温20-30℃、真空压力0.03-0.5mpa、牵引速度1.3m/min。
本发明用料的作用机理:
1、PE100s和PE100RC为本发明配方用料结构的基体,是符合本发明设计方案的实施技术条件和国家用料标准的技术政策。其两种高分子材料的合金互补并优化了基体材料的物理和化学性能。其中PE100s具有抗环应力静液压强度的基体材料特性;PE100RC具有产品在高温条件下使用或发生点载荷情况下仍保持耐慢速裂纹增长的长期稳定的力学性能。
2、聚氧化乙烯[CH2-CH2-O]-n为减阻剂:是由环氧乙烷经碳酸锶催化、开环聚合制得的水溶性聚醚;是一种能减小管道流体湍流摩擦阻力和沿程水头损失的线型高分子聚合物。在管材长期使用过程中,减阻剂缓释溶出亲水基与疏水基附着在管道内壁来减小流体摩擦阻力;并与管道流体混溶成水溶液来加大流动润滑;以及减阻剂大分子在涡流剪切中产生的弹性流变,均大大提高管道输送流体的流速、流量和节省输送能源的消耗。
3、2,4-己二烯酸C6-H8-O2为抗菌剂:是由醋酸经裂解生成乙烯酮,与巴豆醛缩合成聚酯,经水解得到的不饱和脂肪酸;其作用机理是:由于分子结构中羧基的两个双键产生的共轭作用,引发了与微生物酶系统中巯基的结合,终止了巯基功能基团合成活性酶。有效的抑制或杀灭各类微生物菌株的生长和繁衍;达到高效安全的抗菌功效;避免管材在地下长期使用过程中,由于受微生物细菌侵蚀造成性能退化和水质污染。
4、2-(2-羟基-3-叔丁基-5-甲基苯基)-5-氯苯并三唑(UV-326)-C17H18N3OCln为光稳定剂:可吸收太阳光辐射光波290-380nm紫外线。当光稳定剂吸收光能分解氢键时(光稳定剂生成分子内氢键)其吸收能量以热能形式耗散放出。化解了紫外线对共聚物材料的降解作用;避免了管材因贮存期间受到紫外光照射降解使性能退化和质量降低。
5、顺丁烯二酸酐(PE-g-MAH-GR207)C4H2O为相容剂:它能改善合金材料均相体系的分子结构特征;是酸酐基团与极性基团发生脱水反应形成化学键,使非极性聚合物主链引入极性侧基并与极性聚合物支链产生活性接枝形成共聚物材料。其既保持了原材料的特性,又兼具了较好的相容性和协作性,实现了集不同材料特性优势来补充单一材料性能不足的完美结合。
具体实施方式
现对本发明实施例进行详细说明。一种给水用聚乙烯管道的合金材料,其用料组分按百分比计占比如下:
本发明制备工艺如下:
1、按原料组分占比和序号依次罐装在高速混料机容器内,然后启动电源开关搅拌5-10min,其电机转速≥750转/min,待物料混合均匀后关闭电源开关、抽出出料挡板,使混合料徐徐流入料筒内待下一道工序使用。
原料配方→高温混合→(60—70℃/10min)→冷却分散→(10—20℃/10min)→存入料筒。
2、将料筒内混合料吸入挤出机料筒,然后启动电源开关并缓慢转动减速机控转旋钮,控制主机螺杆缓慢运转。然后打开喂料挡板使混合料徐徐进入机筒加料段,通过螺杆顺时运转将混合料推挤至压缩段、计量段、机头口模,再进入真空定径、冷却定型、标识喷码、同步牵引、定尺切割、检验包装工序。
混合配料→挤出塑化→口模定径→冷却定型→标识喷码→同步牵引→定尺切割→检验包装;
熔体温度190-200℃、冷却水温20-30℃、真空压力0.03-0.5mpa、牵引速度1.3m/min。
原产品技术指标及检验达标率(GB/T13663.2-2018)
1、环应力静液压强度5.4mpa
产品原料PE100s
试验温度80℃
试验时间165h
标准要求无破坏、无渗漏
检验结果组批达标率≤90%
2、耐慢速裂纹增长en>5mm/(椎体试验)
产品原料PE100s SDR/11
试验温度80℃
试验时间500h
内部试验压力0.92mpa
标准要求无破坏、无渗漏
检验结果组批达标率≤80%
采用本发明合金材料制作产品其技术指标及检验达标率
1、环应力静液压强度6mpa
产品原料合金材料
试验温度80℃
试验时间165h
标准要求无破坏、无渗漏
检验结果组批达标率≥98%
2、耐慢速裂纹增长en>5mm(椎体试验)
产品原料合金材料SDR/11
试验温度80℃
试验时间500h
内部试验压力1mpa
标准要求无破坏、无渗漏
检验结果组批达标率≥95%
原产品与本发明产品技术指标及检验达标率对比结论
1、环应力静液压强度采用本发明合金材料制作的产品比原产品技术指标提高15%:达标率提高到≥98%。
2、耐慢速裂纹增长en>5mm(椎体试验)采用本发明合金材料制作的产品比原产品技术指标提高8.7%:达标率提高到≥95%。
本发明与现有技术相比优点如下:
本发明针对管材在高温条件下使用或发生点载荷情况下很难保持耐慢速裂纹增长的力学性能,以及提高输送流量、防止水质污染、延长使用寿命等技术要求,做优化用料配置、匹配制作工艺和深加工增值处理,提高了管材的理化性能、成品率及长期稳定性。
本发明是结合产品质检标准和使用条件需要,通过小试、中试和理化检验过程得出的比较先进的技术方案。所以,在本发明权利要求保护范围内的技术改善均属同等保护范围,若有突破性技术改进或创新将另行申报保护要求。
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