CN109438961A - 一种etpu双平壁中空缠绕管 - Google Patents

一种etpu双平壁中空缠绕管 Download PDF

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CN109438961A
CN109438961A CN201811087304.0A CN201811087304A CN109438961A CN 109438961 A CN109438961 A CN 109438961A CN 201811087304 A CN201811087304 A CN 201811087304A CN 109438961 A CN109438961 A CN 109438961A
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etpu
flat walls
wound pipe
hollow wound
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邹伟
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Guiyang Weijia Plastics Co Ltd
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Abstract

本发明公开了一种ETPU双平壁中空缠绕管，管体由以下重量份的组分组成：热塑性聚氨酯(TPU)60‑80份、三元乙丙橡胶4‑8份、发泡剂4‑10份、交联剂1‑2份、非晶态ɑ‑烯烃共聚物10‑18份、有机树脂低聚体10‑20份、改性聚丙烯20‑35份、有机晶须10‑20份、架桥剂1‑2份。优点在于本发明采用了ETPU作为双平壁中空缠绕管的管体材料，不仅优化ETPU各原料的组分和配方，还在原料中增加了有机晶须和三元乙丙橡胶、非晶态ɑ‑烯烃共聚物等，在它们的协同作用下，使得制得的管体环刚度，SN8 9.0‑10.2，SN10 11‑12.8，SN12.5‑14.3‑16.1，SN16 18‑19.6，冲击性能(23℃)TIR/％8‑8.2，蠕变比率2.5‑3，压缩永久变形(％)25‑30，回弹率(％)73‑78。

Description

一种ETPU双平壁中空缠绕管
技术领域
本发明涉及双平壁中空缠绕管技术领域，特别涉及一种ETPU双平壁中空缠绕管。
背景技术
双平壁中空缠绕管一起独特的结构设计，比其它的塑料管道具有更加优越的性能，一般的双壁波纹管材以高密度聚乙烯为原料，其具有重量轻、耐高压、韧性好等优点，但是还存在弹性较差和永久形变较大的问题，而且地埋的话还需要管材本身具备较大的环刚度和环柔度，因为地埋时不承受内压或者承受的内压很小，主要还是承受外压，若环刚度过低则管体将会发生较大的形变，这样就不能保证管材的安全使用。
E-TPU聚氨酯热塑发泡颗粒(简称ETPU、ETPU颗粒或ETPU珠粒)，经过加压加热预处理后，每颗TPU(是一种耐磨、耐撕裂的热塑弹性体材料)粒子像爆米花一样膨胀起来。在这个过程中，原来0.5毫米左右大小的颗粒，体积将增大10倍，于是就形成内含微型密闭气泡的椭圆形非交联发泡颗粒ETPU，形似“爆米花”,其突出的特点是耐磨性优异、耐臭氧性极好、硬度大、强度高、弹性好、耐低温，有良好的耐油、耐化学药品和耐环境性能。将其做成双平壁中空缠绕管便能克服高密度聚乙烯弹性较差和永久形变较大的问题，通过对其原料的组成和配比进行优化，还可以解决环刚度和环柔的问题。
发明内容
本发明要解决的技术问题是提供一种耐压强度高，弹性好，蠕变和压缩永久变形低的ETPU双平壁中空缠绕管，而且其还具有较大的环刚度和环柔度。
本发明的技术方案为：
一种ETPU双平壁中空缠绕管，所述ETPU双平壁中空缠绕管的管体由以下重量份的组分组成：热塑性聚氨酯(TPU)60-80份、三元乙丙橡胶4-8份、发泡剂4-10份、交联剂1-2份、非晶态ɑ-烯烃共聚物10-18份、有机树脂低聚体10-20份、改性聚丙烯20-35份、有机晶须10-20份、架桥剂1-2份。
进一步的，发泡剂由水和乙醇按照0.7-1:1的质量比混合组成或者偶氮二甲酰胺、碳酸氢钠以任意比例混合制成。
进一步的，交联剂为过氧化二异丙苯和双叔丁基过氧化二异丙基苯以任意比例混合。
进一步的，有机树脂低聚体由以下质量份的组分组成：二甲基二乙基硅烷5-6份、苯基三乙基硅烷2.5-3.5份、二苯基二乙基硅烷1.5-2.5份。
进一步的，有机晶须为纤维素晶须、聚(丙烯酸丁酯-苯乙烯)晶须或PHB晶须。
进一步的，架桥剂为无味DCP架桥剂。
本发明的有益之处在于：
本发明采用了ETPU作为双平壁中空缠绕管的管体材料，不仅优化ETPU各原料的组分和配方，还在原料中增加了有机晶须和三元乙丙橡胶、非晶态ɑ-烯烃共聚物等，在它们的协同作用下，使得制得的管体环刚度，SN8 9.0-10.2，SN10 11-12.8，SN12.5-14.3-16.1，SN1618-19.6，冲击性能(23℃)TIR/％8-8.2，蠕变比率2.5-3，压缩永久变形(％)25-30，回弹率(％)73-78。
具体实施方式
下面对本发明的具体实施方式作进一步说明。在此需要说明的是，对于这些实施方式的说明用于帮助理解本发明，但并不构成对本发明的限定。此外，下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互组合。
实施例1：
ETPU双平壁中空缠绕管的管体由以下重量份的组分组成：热塑性聚氨酯(TPU)80份、三元乙丙橡胶4份、偶氮二甲酰胺10份、交联剂2份、非晶态ɑ-烯烃共聚物10份、有机树脂低聚体10份、改性聚丙烯35份、纤维素晶须10份、架桥剂2份。
其中发泡剂采用水和乙醇按照0.7-1:1的质量比混合组成。
实施例2：
ETPU双平壁中空缠绕管的管体由以下重量份的组分组成：热塑性聚氨酯(TPU)60份、三元乙丙橡胶8份、偶氮二甲酰胺4份、交联剂1份、非晶态ɑ-烯烃共聚物18份、有机树脂低聚体20份、改性聚丙烯20份、聚(丙烯酸丁酯-苯乙烯)晶须20份、架桥剂2份。
其中发泡剂采用偶氮二甲酰胺和碳酸氢钠按照质量比1:1混合组成。
实施例3：
ETPU双平壁中空缠绕管的管体由以下重量份的组分组成：热塑性聚氨酯(TPU)70份、三元乙丙橡胶6份、碳酸氢钠6份、交联剂1.5份、非晶态ɑ-烯烃共聚物15份、有机树脂低聚体15份、改性聚丙烯30份、PHB晶须(聚(4-羟基苯甲酯)晶须)15份、架桥剂1.5份。
其中发泡剂采用偶氮二甲酰胺和碳酸氢钠按照任意质量比混合组成。
本发明还各提供了一种上述实施例中的有机树脂低聚体、架桥剂和交联剂的可选择具体的例子：
有机树脂低聚体由以下质量份的组分组成：二甲基二乙基硅烷5-6份、苯基三乙基硅烷2.5-3.5份、二苯基二乙基硅烷1.5-2.5份。
架桥剂采用无味DCP架桥剂。
交联剂采用过氧化二异丙苯和双叔丁基过氧化二异丙基苯以任意比例混合。
ETPU双平壁中空缠绕管制作过程：
(1)造粒，采用现有的ETPU发泡工艺将原材料制成ETPU颗粒。
(2)采用两台挤出机共挤出，将管材内壁和外壁挤出，然后在模具内复合为双层结构，以带状形式连续挤出，冷却后定型，然后依次经缠绕成型、切割、检验工序完成制作。
由于双平壁中空缠绕管制作工艺为现有的技术，本发明中对细节部分就不做多余的赘述。
晶须是指自然形成或者在人工控制条件下(主要形式)以单晶形式生长成的一种纤维，其直径非常小(微米数量级)，不含有通常材料中存在的缺陷(晶界、位错、空穴等)，其原子排列高度有序，因而其强度接近于完整晶体的理论值。其机械强度等于邻接原子间力，晶须的高度取向结构不仅使其具有高强度、高模量和高伸长率，晶须的强度远高于其他短切纤维，将其添加至ETPU的制作原材料中作为增强体，可以极大地提高双平壁中空缠绕管管体的强度。因为本发明中的主体材料均采用高分子聚合材料，为了进一步增加管体的耐压性能和弹性，还在原材料中增加了三元乙丙橡胶，为了增加复合材料的连接强度，采用了非晶态ɑ-烯烃共聚物和有机树脂低聚体作为连接介质。
本发明中实施例制得的产品技术指标范围如下：
以上对本发明的实施方式作了详细说明，但本发明不限于所描述的实施方式。对于本领域的技术人员而言，在不脱离本发明原理和精神的情况下，对这些实施方式进行多种变化、修改、替换和变型，仍落入本发明的保护范围内。

Claims (6)

1.一种ETPU双平壁中空缠绕管，其特征在于，所述ETPU双平壁中空缠绕管的管体由以下重量份的组分组成：热塑性聚氨酯(TPU)60-80份、三元乙丙橡胶4-8份、发泡剂4-10份、交联剂1-2份、非晶态ɑ-烯烃共聚物10-18份、有机树脂低聚体10-20份、改性聚丙烯20-35份、有机晶须10-20份、架桥剂1-2份。
2.根据权利要求1所述的ETPU双平壁中空缠绕管，其特征在于：所述发泡剂由水和乙醇按照0.7-1:1的质量比混合组成或者偶氮二甲酰胺、碳酸氢钠以任意比例混合制成。
3.根据权利要求1所述的ETPU双平壁中空缠绕管，其特征在于：所述交联剂为过氧化二异丙苯和双叔丁基过氧化二异丙基苯以任意比例混合。
4.根据权利要求1所述的ETPU双平壁中空缠绕管，其特征在于，所述有机树脂低聚体由以下质量份的组分组成：二甲基二乙基硅烷5-6份、苯基三乙基硅烷2.5-3.5份、二苯基二乙基硅烷1.5-2.5份。
5.根据权利要求1所述的ETPU双平壁中空缠绕管，其特征在于：所述有机晶须为纤维素晶须、聚(丙烯酸丁酯-苯乙烯)晶须或PHB晶须。
6.根据权利要求1所述的ETPU双平壁中空缠绕管，其特征在于：所述架桥剂为无味DCP架桥剂。
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