CN115027119A - 一种新型抗冲复合管及其制备方法 - Google Patents
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Abstract
本发明公开了一种新型抗冲复合管及其制备方法,该复合管从内到外依次是主体内层、增强层、过渡层和UHMWPE保护层,所述主体内层包括如下重量份的组分:聚丙烯为70‑90份,HDPE为10‑20份,增韧剂为5‑15份,UHMWPE为0‑5份,相容剂为0‑8份,交联剂为1‑5份,DCP为0.001‑0.02份。本发明在传统增韧的基础上,提出了添加HDPE、UHMWPE协效增强,同时还引入交联剂,相容剂,使主体材料形成网络结构,进一步提高基体材料的整体强度及力学稳定性,制备得到的复合管防冲击能力强,受到撞击时不产生碎片。
Description
技术领域
本发明属于复合管制备技术领域,具体涉及一种新型抗冲复合管及其制备方法。
背景技术
为切实解决安全生产、安全运输,安全防护的需求在不断扩大。传统的防护栏为钢制材料,一次性投入小,形式多样且灵活,但工艺粗糙,稳定性差,且发生事故时,还容易造成人员伤害,当前情况下已无法跟上国家关于安全标准化建设要求的步伐。因此,开发新型安全的复合材料防护栏产品势在必行。
聚丙烯作为五大通用塑料之一,具有较高的强度及力学稳定性,但其存在一定的脆性问题,限制了聚丙烯抗冲领域的应用。通过选用高抗冲聚丙烯以及添加增韧剂,提高其韧性,同时进行交联处理,可以一定程度上解决其抗冲问题。进一步的,通过复合化结构设计,以抗冲改性材料作为主体材料,同时复合增强纤维,以达到整体强度要求。
另外,传统抗冲产品容易造成二次损伤的主要原因是在其受到撞击时破坏,造成碎片飞溅,对周围的人员、设施造成损害。因此,保证抗冲产品在受到撞击时不产生碎片,也是产品开发的重点。超高分子量聚乙烯(UHMWPE)具有极高的抗冲性能,因此将其复合在产品结构中,可以有效解决碎片飞溅的问题。
发明内容
针对上述问题,本发明的目的在于提供一种新型抗冲复合管及其制备方法。
为达到上述目的,提出以下技术方案:
一种新型抗冲复合管,从内到外依次是主体内层、增强层、过渡层和UHMWPE保护层,所述主体内层包括如下重量份的组分:聚丙烯为70-90份,HDPE(高密度聚乙烯)为10-20份,增韧剂为5-15份,UHMWPE为0-5份,相容剂为0-8份,交联剂为1-5份,DCP(过氧化二异丙苯)为0.001-0.02份;在传统增韧的基础上,提出了添加HDPE、UHMWPE协效增强,同时还引入交联剂,相容剂,使主体材料形成网络结构,进一步提高基体材料的整体强度及力学稳定性。
进一步地,增强层的原料组分为玻璃纤维、聚酯纤维、超高聚乙烯纤维、碳纤维中的一种。
进一步地,所述过渡层的原料组分为LDPE(低密度聚乙烯)、MDPE(中密度聚乙烯)、HDPE、UHMWPE中的一种或者几种混合物。
进一步地,UHMWPE保护层中的原料组分UHMWPE的分子量大于300万,引入超高分子量聚乙烯作为外部保护层,该材料由于其超高分子量,支链少,其链结构为球状聚集态,具有高抗冲,自润滑功能,一方面可以有效防止复合管在受到撞击时产生碎片飞溅,同时可以达到一定的表面自润滑防污效果。
进一步地,增韧剂为POE、EPDM、SBS、SEBS中的一种或者几种混合物,相容剂为MPP(改性聚丙烯),交联剂为八乙烯基-POSS。
一种新型抗冲复合管的制备方法,包括如下步骤:通过单螺杆挤出机挤出主体内层,定径冷却后,进行增强层的缠绕,每缠绕一层,需进行红外加热,缠绕完成后,再通过单螺杆挤出机模头进行过渡层包覆,然后表面经过等离子处理后进行UHMWPE保护层的包覆,由于超高分子量聚乙烯(UHMWPE)具有较高的自润滑性能,在缠绕纤维后,很难实现外层共挤,因此引入过渡层,同时在表面进行等离子体处理,在表面形成一定的粗糙度,便于UHMWPE包覆;此外,由于等离子体处理,表面还会形成一定量自由基,当熔融态UHMMPE包覆时,还可以与UHMWPE链段形成键合,进一步提高过渡层与超高分子量聚乙烯的结合力。
进一步地,增强层与主体内层之间通过粘结材料粘结,所述粘结材料为OBC(乙烯-1-辛烯嵌段共聚物)、LDPE、PP(聚丙烯)共混物接枝马来酸酐制得。
进一步地,UHMWPE保护层通过拉伸流变挤出机挤出,可以保证挤出的UHMWPE保护层与主体管道保持相同的挤出速度。
本发明的有益效果在于:
1)本发明制备得到的复合管防冲击能力强,受到撞击时不产生碎片;
2)本发明制备得到的复合管的稳定性好,强度高。
附图说明
图1为本发明的结构示意图;
图中:1、主体内层;2、增强层;3、过渡层;4、UHMWPE保护层。
具体实施方式
下面结合说明书附图和实施例对本发明做进一步地说明,但本发明的保护范围并不仅限于此。
如图1所示,一种新型抗冲复合管,从内到外依次是主体内层1、增强层2、过渡层3和UHMWPE保护层4。
实施例1
主体内层1的原料组分为聚丙烯80份,HDPE为10份,POE为5份,相容剂4份,八乙烯基-POSS为1份,DCP为0.002份;
增强层2为玻璃纤维预制带,粘结材料采用OBC、LDPE、PP共混物接枝马来酸酐制得,添加比例为6%;
过渡层3的原料组分为HDPE和UHMWPE,HDPE与UHMWPE的质量比为5:5;
UHMWPE保护层4的原料组分为UHMWPE,UHMWPE的分子量为300万。
通过单螺杆挤出机挤出主体内层1的原料组分,主体内层1的外径为63mm,厚度为5.8mm,定径冷却后,进行增强层1的缠绕,每缠绕一层需进行红外加热,将预浸带内的粘结材料进行熔化,加热温度为220℃,共缠绕4层,缠绕完成后再通过单螺杆挤出机模头进行过渡层3的包覆,在挤出冷却后,进行等离子体处理,形成粗糙表面,最后进行UHMWPE保护层4的包覆,制备得到复合管,四层结构壁厚由内至外控制在3:1:1:0.8。
制备得到的复合管按照GB/T 14152—2001规定进行耐外冲击性能试验,截取10组管材样品,长度为(200±10)mm,选用锤头d90,16kg的落锤,从2m高处落下对管材进行冲击,测试测试结果为25个点都不破坏。
实施例2
主体内层1的原料组分为聚丙烯75份,HDPE为10份,POE为10份,相容剂4份,八乙烯基-POSS为1份,DCP为0.001份;
增强层2为玻璃纤维预制带,粘结材料采用OBC、LDPE、PP共混物接枝马来酸酐制得,添加比例为8%;
过渡层3的原料组分为HDPE和UHMWPE,HDPE与UHMWPE的质量比为6:4;
UHMWPE保护层4的原料组分为UHMWPE,UHMWPE的分子量为300万。
通过单螺杆挤出机挤出主体内层1的原料组分,主体内层1的外径为90mm,厚度为8.2mm,定径冷却后,进行增强层1的缠绕,每缠绕一层需进行红外加热,将预浸带内的粘结材料进行熔化,加热温度为200℃,共缠绕4层,缠绕完成后再通过单螺杆挤出机模头进行过渡层3的包覆,在挤出冷却后,进行等离子体处理,形成粗糙表面,最后进行UHMWPE保护层4的包覆,制备得到复合管。四层结构壁厚由内至外控制在4:2:2:1.2。
制备得到的复合管按照GB/T 14152—2001规定进行耐外冲击性能试验,截取10组管材样品,长度为(200±10)mm,选用锤头d90,16kg的落锤,从2m高处落下对管材进行冲击,测试测试结果为25个测试点都不破坏。
实施例3
主体内层1的原料组分为聚丙烯70份,HDPE为15份,POE为8份,相容剂6份,八乙烯基-POSS为1份,DCP为0.005份;
增强层2为玻璃纤维预制带,粘结材料采用OBC、LDPE、PP共混物接枝马来酸酐制得,添加比例为8%;
过渡层3的原料组分为HDPE和UHMWPE,HDPE与UHMWPE的质量比为7:3;
UHMWPE保护层4的原料组分为UHMWPE,UHMWPE的分子量为400万。
通过单螺杆挤出机挤出主体内层1的原料组分,主体内层1的外径为125mm,厚度为14mm,定径冷却后,进行增强层1的缠绕,每缠绕一层需进行红外加热,将预浸带内的粘结材料进行熔化,加热温度为220℃,共缠绕4层,缠绕完成后再通过单螺杆挤出机模头进行过渡层3的包覆,在挤出冷却后,进行等离子体处理,形成粗糙表面,最后进行UHMWPE保护层4的包覆,制备得到复合管。四层结构壁厚由内到外控制在7:3:2:2。
制备得到的复合管按照GB/T 14152—2001规定进行耐外冲击性能试验,截取10组管材样品,长度为(200±10)mm,选用锤头d90,16kg的落锤,从2m高处落下对管材进行冲击,测试测试结果为25个测试点都不破坏。
Claims (8)
1.一种新型抗冲复合管,其特征在于从内到外依次是主体内层(1)、增强层(2)、过渡层(3)和UHMWPE保护层(4),所述主体内层(1)包括如下重量份的组分:聚丙烯为70-90份,HDPE为10-20份,增韧剂为5-15份,UHMWPE为0-5份,相容剂为0-8份,交联剂为1-5份,DCP为0.001-0.02份。
2.如权利要求1所述的一种新型抗冲复合管,其特征在于增强层(2)的原料组分为玻璃纤维、聚酯纤维、超高聚乙烯纤维、碳纤维中的一种。
3.如权利要求1所述的一种新型抗冲复合管,其特征在于所述过渡层(3)的原料组分为LDPE、MDPE、HDPE、UHMWPE中的一种或者几种混合物。
4.如权利要求1所述的一种新型抗冲复合管,其特征在于UHMWPE保护层(4)中的原料组分UHMWPE的分子量大于300万。
5.如权利要求1所述的一种新型抗冲复合管,其特征在于增韧剂为POE、EPDM、SBS、SEBS中的一种或者几种混合物,相容剂为MPP,交联剂为八乙烯基-POSS。
6.一种如权利要求1所述的新型抗冲复合管的制备方法,其特征在于包括如下步骤:通过单螺杆挤出机挤出主体内层(1),定径冷却后,进行增强层(2)的缠绕,每缠绕一层,需进行红外加热,缠绕完成后,再通过单螺杆挤出机模头进行过渡层(3)包覆,然后表面经过等离子处理后进行UHMWPE保护层(4)的包覆。
7.如权利要求6所述的新型抗冲复合管的制备方法,其特征在于增强层(2)与主体内层(1)之间通过粘结材料粘结,所述粘结材料为OBC、LDPE、PP共混物接枝马来酸酐制得。
8.如权利要求6所述的新型抗冲复合管的制备方法,其特征在于UHMWPE保护层(4)通过专用拉伸流变挤出机进行挤出包覆。
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