CN107353474A - 一种复合内镶贴片式滴灌管及其制备方法 - Google Patents
一种复合内镶贴片式滴灌管及其制备方法 Download PDFInfo
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- CN107353474A CN107353474A CN201710571488.7A CN201710571488A CN107353474A CN 107353474 A CN107353474 A CN 107353474A CN 201710571488 A CN201710571488 A CN 201710571488A CN 107353474 A CN107353474 A CN 107353474A
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- extruder
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- 230000002262 irrigation Effects 0.000 title claims abstract description 80
- 238000003973 irrigation Methods 0.000 title claims abstract description 80
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 16
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
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- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
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- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 2
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 1
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- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 7
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Abstract
本发明公开了一种复合内镶贴片式滴灌管,包括实壁内层、发泡芯层和实壁外层,所述发泡芯层设置在所述实壁内层和所述实壁外层之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯40%~60%%,低密度聚乙烯10%~30%,线性低密度聚乙烯10%~30%,功能母粒1%~2%,黑色母3%~5%%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯60%~80%,低密度聚乙烯15%~30%,AC发泡体系2%~4%,DCP交联体系0.5%~1%,黑色母3%~5%;本发明还提供了该滴灌管的制备方法,采用本发明增加了滴灌管的强度,解决了滴灌管随壁厚的增加滴头出水框处管壁打孔不透的技术问题。
Description
技术领域
本发明涉及滴灌管领域,尤其是一种复合内镶贴片式滴灌管及其制备方法。
背景技术
滴灌是利用安装在末级管道(称为毛管)上的滴头,或与毛管制作成一体的滴灌带(或滴灌管)将管道内部的水以水滴状均匀而又缓慢地滴入作物根区土壤中。在灌水器流量较大时,形成连续细小水流湿润土壤。通常将毛管和灌水器放在地面,也可以把毛管和灌水器埋入地面以下30cm左右。前者称为地表滴灌,后者称为地下滴灌。地表灌溉保证土壤湿度,明显减少病虫害的发生,进而又可减少农药的用量。灌水器埋在地下,不会产生地表径流,最大限度地降低了表层土壤的含水量,滴灌灌水器所湿润的区域为球形,湿润区的体积和表面积都大大增加,为作为根系增生扩散吸收营养提供了更大的空间;采用滴灌技术滴灌具有省水50%,增产30%,增加5%~7%的土地利用率,提高肥料利用率到50%以上的优点。
目前国内滴灌***中采用的滴灌管(带)产品以壁厚分为两类,一类是薄壁非复用型滴灌带,即0.4mm以下的滴灌带;一类是厚壁复用型滴灌管,即0.4mm~1.0mm的滴灌管。一般情况下,1.0mm以上的滴灌管在市场上几乎没有,其主要原因一方面是壁厚高,滴灌管的生产材料需求多,成本高,价格高,另一方面是现有打孔成型技术随滴灌管壁厚的增加,其打孔成型的难度逐步上升,1.0mm以上的滴灌管会出现滴灌管管壁打孔不透的情况。
发明内容
本发明所要解决的技术问题就是在于针对上述现有技术中的不足,提供一种复合内镶贴片式滴灌管及其制备方法。
为解决上述技术问题,本发明的第一个目的是提供一种复合内镶贴片式滴灌管,采用的技术方案是:
一种复合内镶贴片式滴灌管,包括实壁内层、发泡芯层和实壁外层,所述发泡芯层设置在所述实壁内层和所述实壁外层之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯40%~60%%,低密度聚乙烯10%~30%,线性低密度聚乙烯10%~30%,功能母粒1%~2%,黑色母3%~5%%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯60%~80%,低密度聚乙烯15%~30%,AC发泡体系2%~4%,DCP交联体系0.5%~1%,黑色母3%~5%。
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
本发明的第二个目的是提供一种复合内镶贴片式滴灌管的制备方法,采用如下技术方案:包括下述制备步骤:
(1)按质量比例分别称取实壁内层和实壁外层的原料:高密度聚乙烯40~60份,低密度聚乙烯10~30份,线性低密度聚乙烯10~30份,功能母粒1~2份,黑色母3~5份;在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为4~8%,DCP交联体系为1~2%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为80~170℃;按质量比例称取发泡芯层材料:高密度聚乙烯60~80%,低密度聚乙烯15~30%,浓缩母粒5~10%,在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,所述步骤(2)中挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃。
更进一步的,所述步骤(4)挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
与现有技术相比,本发明的有益效果是:本发明设有实壁内层、实壁外层和发泡芯层,实壁内层的壁厚即可满足滴灌***的工作压力要求,滴灌管生产过程中热熔粘接滴头的要求和滴灌管机械化铺设的抗拉要求;交联的低发泡度发泡芯层减少了1.0mm以上滴灌管的材料需求,同时降低了滴灌管中间层材料的热传导系数,提高了滴灌管的耐候性。
本发明设有的发泡芯层,降低了滴灌管的材料硬度,解决了滴灌管随壁厚的增加滴头出水框处管壁打孔不透的生产技术问题,同时降低了打孔成型机上打孔刀磨损的速度。
本发明设有的交联的低发泡度发泡芯层,增加了滴灌管材料的横向强度,解决了因滴灌管在牵引拉伸方向形成较高的纵向取向,横向强度较低,在扁平滴头与管壁热熔粘接周边形成应力集中,在昼夜温差较大的地区长久使用时,滴头与管壁热熔粘接部位处出现开裂的问题。
附图说明
图1所示为复合内镶式滴灌管的结构示意图;
图中:1—实壁外层,2—发泡芯层,3—实壁内层,4—内镶滴头。
具体实施方式
以下结合具体实施例对本发明作进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1
一种复合内镶贴片式滴灌管,包括实壁内层1、发泡芯层2和实壁外层3,所述发泡芯层2设置在所述实壁内层1和所述实壁外层3之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯40%,低密度聚乙烯30%,线性低密度聚乙烯24%,功能母粒1%,黑色母5%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯60%,低密度聚乙烯30%,AC发泡体系2%,DCP交联体系1%,黑色母5%;
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头4为扁平或圆柱式滴头,滴头流量3~6L/h。
上述复合内镶贴片式滴灌管其制备方法:
(1)按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为4%,DCP交联体系为1%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为80℃;按质量比例称取发泡芯层材料:高密度聚乙烯60%、低密度聚乙烯30%、浓缩母粒5%份、黑色母5%份;在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合3加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,上述挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃;
更进一步的,上述挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
实施例2
一种复合内镶贴片式滴灌管,包括实壁内层1、发泡芯层2和实壁外层3,所述发泡芯层2设置在所述实壁内层1和所述实壁外层3之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯45%,低密度聚乙烯18%,线性低密度聚乙烯30%,功能母粒2%,黑色母3.5%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯64%,低密度聚乙烯23%,AC发泡体系4%,DCP交联体系1%,黑色母3%;
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
上述复合内镶贴片式滴灌管其制备方法:
(1)按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为6%,DCP交联体系为2%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为100℃;按质量比例称取发泡芯层材料:高密度聚乙烯64%、低密度聚乙烯23%、浓缩母粒10%、黑色母3%;在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层原料加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,上述挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃。
更进一步的,上述挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
实施例3
一种复合内镶贴片式滴灌管,包括实壁内层1、发泡芯层2和实壁外层3,所述发泡芯层2设置在所述实壁内层1和所述实壁外层3之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯48%,低密度聚乙烯26%,线性低密度聚乙烯21%,功能母粒1%,黑色母4%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯68%,低密度聚乙烯20%,AC发泡体系3%,DCP交联体系0.5%,黑色母4%;
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
上述复合内镶贴片式滴灌管其制备方法:
(1)按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为6%,DCP交联体系为2%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为120℃;按质量比例称取发泡芯层材料:高密度聚乙烯68%、低密度聚乙烯20%、浓缩母粒8%、黑色母4%;在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层原料加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,上述挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃;
更进一步的,上述挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
实施例4
一种复合内镶贴片式滴灌管,包括实壁内层1、发泡芯层2和实壁外层3,所述发泡芯层2设置在所述实壁内层1和所述实壁外层3之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯50%,低密度聚乙烯20%,线性低密度聚乙烯24%,功能母粒2%,黑色母4%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯72%,低密度聚乙烯15%,AC发泡体系3.5%,DCP交联体系0.5%,黑色母5%;
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
上述复合内镶贴片式滴灌管其制备方法:
(1)按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为7%,DCP交联体系为1%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为140℃;按质量比例称取发泡芯层材料:高密度聚乙烯72%、低密度聚乙烯15%、浓缩母粒9%、黑色母5%;在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,上述挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃。
更进一步的,上述挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
实施例5
一种复合内镶贴片式滴灌管,包括实壁内层1、发泡芯层2和实壁外层3,所述发泡芯层2设置在所述实壁内层1和所述实壁外层3之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯55%,低密度聚乙烯10%,线性低密度聚乙烯27%,功能母粒1%,黑色母3%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯76%,低密度聚乙烯12%,AC发泡体系3.5%,DCP交联体系0.5%,黑色母4%;
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
上述复合内镶贴片式滴灌管其制备方法:
(1)按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为7%,DCP交联体系为1%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为160℃;按质量比例称取发泡芯层材料:高密度聚乙烯76%、低密度聚乙烯12%、浓缩母粒8%、黑色母4%;在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,上述挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃。
更进一步的,上述挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
实施例6
一种复合内镶贴片式滴灌管,包括实壁内层1、发泡芯层2和实壁外层3,所述发泡芯层2设置在所述实壁内层1和所述实壁外层3之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯60%,低密度聚乙烯25%,线性低密度聚乙烯10%,功能母粒2%,黑色母3%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯80%,低密度聚乙烯10%,AC发泡体系3%,DCP交联体系0.5%,黑色母3%;
更进一步的,所述功能母料为含氟聚合物加工助剂PPA。
更进一步的,所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
更进一步的,DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
更进一步的,实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
更进一步的,滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
上述复合内镶贴片式滴灌管其制备方法:
(1)按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为6%,DCP交联体系为1%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为170℃;按质量比例称取发泡芯层材料:高密度聚乙烯80%、低密度聚乙烯10%、浓缩母粒7%、黑色母3%;在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层原料加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
更进一步的,上述挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃;
更进一步的,上述挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
本发明制得的复合内镶贴片式滴灌管的流量均匀性、常温静水压、高温静水压、耐拉拔性能依据《GB/T 19812.3-2008塑料节水灌溉器材内镶式滴灌带、带》进行测试。滴灌管性能测试结果如表一所示:
表一 滴灌管性能测试结果
以上所述6个实施例仅是本发明的优选实施方式,应当指出的是,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (9)
1.一种复合内镶贴片式滴灌管,包括实壁内层、发泡芯层和实壁外层,所述发泡芯层设置在所述实壁内层和所述实壁外层之间;所述实壁内层和实壁外层按照质量百分比包括以下成份:高密度聚乙烯40%~60%%,低密度聚乙烯10%~30%,线性低密度聚乙烯10%~30%,功能母粒1%~2%,黑色母3%~5%%;所述发泡芯层按照质量百分比包括以下成份:高密度聚乙烯60%~80%,低密度聚乙烯15%~30%,AC发泡体系2%~4%,DCP交联体系0.5%~1%,黑色母3%~5%。
2.根据权利要求1所述的复合内镶贴片式滴灌管,其特征在于:所述功能母料为含氟聚合物加工助剂PPA。
3.根据权利要求1所述的复合内镶贴片式滴灌管,其特征在于:所述AC发泡体系由偶氮二甲酰胺、氧化锌、硬脂酸锌组成,其质量比例为4:3:1。
4.根据权利要求1所述的复合内镶贴片式滴灌管,其特征在于:DCP交联剂由过氧化二异丙苯、碳酸钙、碳酸钠组成,其质量比例为3:1:1。
5.根据权利要求1所述的复合内镶贴片式滴灌管,其特征在于:实壁内层的壁厚为0.15~0.2mm、所述实壁外层的壁厚为0.15~0.2mm、所述发泡芯层的壁厚为0.6~1.7mm。
6.根据权利要求1所述的复合内镶贴片式滴灌管,其特征在于:滴灌管的内镶滴头的为扁平或圆柱式滴头,滴头流量3~6L/h。
7.一种复合内镶贴片式滴灌管制备方法,其特征在于:包括如下步骤:
按质量比例分别称取实壁内层和实壁外层的原料,在混料机80℃下均匀混合30min后待用;
(2)将所述步骤(1)均匀混合的实壁内层和实壁外层原料加入挤出机一中,在挤出机一经过剪切、加温塑化输送至共挤机头处,其中挤出机一机筒的工艺温度为160~230℃;
(3)按质量比例分别称取AC发泡体系和DCP交联体系;其中AC发泡体系为4~8%,DCP交联体系为1~2%,均匀混合后由单螺杆挤出机进行造粒,制备成2倍的浓缩母粒,单螺杆挤出机的工艺温度为80~170℃;按质量比例称取发泡芯层材料:高密度聚乙烯60~80%,低密度聚乙烯15~30%,浓缩母粒5~10%,在混料机均匀混合30min后待用;
(4)所述步骤(3)均匀混合的发泡芯层加入挤出机二中,在挤出机二经过进行加温塑化、挤出、定型、冷却、切粒、风干工艺输送至共挤机头处,挤出机二的机筒工艺温度为100~170℃;
(5)共挤机头工艺温度为190~210℃,共挤机头挤出管状物料的经牵引送入真空冷却定径箱定径冷却,再经打孔成型机在滴头出水框处打孔后,由收卷机收卷得复合内镶式滴灌管。
8.根据权利要求7所述的复合内镶贴片式滴灌管制备方法,其特征在于:所述步骤(2)中挤出机一的机筒各段设定温度为挤出机一机筒一区为160℃,挤出机一机筒二区为190℃,挤出机一机筒三区为210℃,挤出机一机筒四区为230℃。
9.根据权利要求7所述的复合内镶贴片式滴灌管制备方法,其特征在于:所述步骤(4)挤出机二的机筒各段设定温度为挤出机机筒一区80℃,挤出机机筒二区为110℃,挤出机机筒三区为130℃,挤出机机筒四区为140℃,机头一区温度为150℃,机头二区为160℃,机头三区为170℃。
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