CN102558681B - 一种非开挖专用电力波纹管及其制备方法 - Google Patents

一种非开挖专用电力波纹管及其制备方法 Download PDF

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CN102558681B
CN102558681B CN2011104541101A CN201110454110A CN102558681B CN 102558681 B CN102558681 B CN 102558681B CN 2011104541101 A CN2011104541101 A CN 2011104541101A CN 201110454110 A CN201110454110 A CN 201110454110A CN 102558681 B CN102558681 B CN 102558681B
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何龙新
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FUJIAN SINYO PIPELINE TECHNOLOGY Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/88Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/625Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/92Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92514Pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92504Controlled parameter
    • B29C2948/92704Temperature
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92857Extrusion unit
    • B29C2948/92876Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895Barrel or housing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00Indexing scheme relating to extrusion moulding
    • B29C2948/92Measuring, controlling or regulating
    • B29C2948/92819Location or phase of control
    • B29C2948/92923Calibration, after-treatment or cooling zone

Abstract

本发明公开了一种非开挖专用电力波纹管,其内包含的原料及其质量百分含量为:聚丙烯65-75%;尼龙15-20%;玻璃纤维2-7%;相容剂1-5%;偶联剂0.2-2.5%;抗氧剂0.1-0.5%;抗紫外线吸收剂0.1-0.5%;润滑剂0.1-0.4%;色粉0.4-1.0%。本发明所述的非开挖专用电力波纹管(FATP)的制备方法包括以下步骤:1)上料、烘干;2)混炼、挤出;3)冷却、成型;4)切割、盘卷;5)检验、入库。本发明的产品合理的引入尼龙材料来改性聚丙烯,提高产品的耐热性、拉伸强度及耐磨性,同时还添加一定比例的玻璃纤维可提高产品的环片热压缩力,其综合性能指标均得到一定程度的改善。

Description

一种非开挖专用电力波纹管及其制备方法
技术领域
本发明涉及波纹管领域,尤其涉及一种非开挖专用电力波纹管及其制备方法。
背景技术
PE(聚乙烯)管的伸长率为钢管的20多倍,是PVC(聚氯乙烯)管的六倍半,所以虽然PE管强度较低,但其断裂伸长率却非常高,延伸性很强。当地面下沉或发生地震时地壳有变动的情况下,PE管能够产生抗变形性而不断裂,所以目前一般用PE管作为燃气管道、水管的输送管路。当把PE管用于电力排管时,由于电力电缆排管长期运行在70度左右高温下,且需承受地下泥水的外压力,工作环境不同于水管和燃气管,然而PE管在温度40度以上时强度大幅度下降,所以不能用于电力排管。
目前,国内的电力电缆排管一般采用MPP(改性聚丙烯)管,由于MPP管韧性好,具有优良的抗地层沉降、抗震性能,克服了PE管在40℃以上时力学性能大幅度下降的缺点。但MPP管材一般每隔9米处需要焊接,时间需30分钟左右,并且还要用特殊工具消除内壁因焊接而产生的多余残留物。同时,MPP管的安装对场地、施工设备、气候要求更高,散热效果不够好。
发明内容
为了克服现有技术的不足,本发明的目的在于提供一种施工方便、综合性能好的非开挖专用电力波纹管及其制备方法。
一种非开挖专用电力波纹管(FATP),其内包含的原料及其质量百分含量为: 
聚丙烯          65-75%;
尼龙            15-20%;
玻璃纤维        2-7%;
相容剂          1-5%;
偶联剂          0.2-2.5%;
抗氧剂          0.1-0.5%;
抗紫外线吸收剂  0.1-0.5%;
润滑剂          0.1-0.4%;
色粉            0.4-1.0%。
所述相容剂为马来酸酐接枝聚丙烯。
所述尼龙为尼龙11或尼龙12。
所述玻璃纤维为无碱长玻璃纤维。
所述偶联剂为γ-氨基丙基三乙氧基硅烷或γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷。
所述抗氧剂为下列中的一种:四季戊四醇酯、丙酸十八醇酯或硫代二丙酸二月桂酯。
所述抗紫外线吸收剂为氯代苯并三唑或2-羟基-4-辛氧基二苯甲酮。 
所述润滑剂为乙烯基双硬脂酸酰胺。
所述色粉为桔红色粉。
本发明所述的非开挖专用电力波纹管(FATP)的制备方法包括以下步骤:
1)上料、烘干:将聚丙烯PP、尼龙PA、相容剂、偶联剂、抗氧剂、抗紫外线吸收剂、润滑剂、色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为42-46:1双螺杆挤出机中,在180-230℃下将原料混炼成熔融状,再在侧喂口加入玻璃纤维,将全部原料都熔融后,再将熔融状的原料在185-235℃的挤出温度下挤出、挤出压力为5-10mpa,挤出真空度为-0.05~-0.03mpa,挤出的管材牵引速度为1-3m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为15-25℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每100-150m一段,并将其盘卷;
5)检验、入库。
本发明中,挤出成型温度是促使管材原材料成型和熔体流动的关键条件,它对挤出成型过程中产品的质量和产量均有十分重要的影响。在挤出成型过程中,原料从固态进入挤出机后,要完成输送、压实、熔融、均化直到高温熔融坯从机头中挤出,因此本发明将混炼熔融温度控制在180-230℃,挤出温度为185-235℃。
在挤出过程中,真空度控制的恰当与否,将直接影响产品质量。在满足管材外观质量的前提下,让真空度尽可能低,这样管材的内应力小,产品在存放过程中变形小。但真空度如果太低,对管坯的吸附力不足,管坯易变形,无法保证产品的外观质量及尺寸精度,所以本发明将挤出的真空度控制在-0.05~-0.03mpa。
本发明的非开挖专用电力波纹管(FATP)合理的引入尼龙材料来改性聚丙烯,可提高产品的耐热性、拉伸强度及耐磨性,同时还添加一定比例的玻璃纤维可提高产品的环片热压缩力。通过以上改性,本发明的产品在综合性能上有了很大的提高,目前本发明的产品在电力非开挖设备上的应用,属国内首创。
与此同时,本发明的非开挖专用电力波纹管(FATP)在传统的非开挖电力MPP实壁管基础上,进行了技术与施工环节上的改进与创新,所以本发明的非开挖专用电力波纹管(FATP)具有以下优点:
(1)本发明的FATP管可盘卷100-150米,施工环节少,安装速度快,降低了施工成本。传统MPP管材一般每隔9米处需要焊接,时间约30分钟,并且还要用特殊工具消除内壁焊接多余残留物,MPP管的安装对场地要求、施工设备要求、气候要求更高。
(2)本发明的FATP管提高了管道的整体质量及保证了系统的安全性,消除了由于人为焊接所产生的质量风险。
(3)本发明的FATP管穿电缆的阻力小。
(4)本发明的FATP管散热效果好,其导热系数比MPP管高。
(5)本发明的FATP管合理的引入尼龙材料来改性聚丙烯,提高产品的耐热性、拉伸强度及耐磨性。同时还添加一定比例的玻璃纤维,提高产品的环片热压缩力。
(6)本发明的FATP管属于高性价比的环保产品,本发明的FATP管与传统的MPP管相比,在相同规格情况下,管材为波纹结构,重量可以减轻25%左右,综合性能指标,例如:地下抗变形能力,刚度、柔韧性、耐热性、管材内壁的穿缆阻力,以及电缆的散热效果均得到一定程度的改善。
具体实施方式
下面结合具体实施方式对本发明作进一步详细的说明。
本发明一种非开挖专用电力波纹管,其内包含的原料及其质量百分含量为: 
聚丙烯          65-75%;
尼龙            15-20%;
玻璃纤维        2-7%;
相容剂          1-5%;
偶联剂          0.2-2.5%;
抗氧剂          0.1-0.5%;
抗紫外线吸收剂  0.1-0.5%;
润滑剂          0.1-0.4%;
色粉            0.4-1.0%。
本发明所述的非开挖专用电力波纹管(FATP)的制备方法包括以下步骤:
1)上料、烘干:将聚丙烯PP、尼龙PA、相容剂、偶联剂、抗氧剂、抗紫外线吸收剂、润滑剂、色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为42-46:1双螺杆挤出机中,在180-230℃下将原料混炼成熔融状,再在侧喂口加入玻璃纤维,将全部原料都熔融后,再将熔融状的原料在185-235℃的挤出温度下挤出、挤出压力为5-10mpa,挤出真空度为-0.05~-0.03mpa,挤出的管材牵引速度为1-3m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为15-25℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每100-150m一段,并将其盘卷;
5)检验、入库。
实施例1
先按以下配方称取原料:
聚丙烯                          6.5kg;
尼龙11                         2.0 kg;
无碱长玻璃纤维                  0.7 kg;
相容剂马来酸酐接枝聚丙烯        0.5 kg;
偶联剂γ-氨基丙基三乙氧基硅烷   0.06 kg;
抗氧剂四季戊四醇酯              0.05 kg;
抗紫外线吸收剂氯代苯并三唑      0.05 kg;
润滑剂乙烯基双硬脂酸酰胺        0.04 kg;
桔红色粉                        0.1kg。
本发明产品的制备过程为:
1)上料、烘干:将聚丙烯PP、尼龙11、相容剂马来酸酐接枝聚丙烯、偶联剂γ-氨基丙基三乙氧基硅烷、抗氧剂四季戊四醇酯、抗紫外线吸收剂氯代苯并三唑、润滑剂乙烯基双硬脂酸酰胺、桔红色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为42:1双螺杆挤出机中,在180℃下将原料混炼成熔融状,再在侧喂口加入无碱长玻璃纤维,将全部原料都熔融后,再将熔融状的原料在200℃的挤出温度下挤出、挤出压力为5mpa,挤出真空度为-0.05mpa,挤出的管材牵引速度为2m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为15℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每100m一段,并将其盘卷;
5)检验、入库。
实施例2
先按以下配方称取原料:
聚丙烯                                   7.5 kg;
尼龙12                                  1.5 kg;
无碱长玻璃纤维                          0.2 kg;
相容剂马来酸酐接枝聚丙烯                0.5 kg;
偶联剂γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷          0.23 kg;
抗氧剂丙酸十八醇酯                      0.01 kg;
抗紫外线吸收剂2-羟基-4-辛氧基二苯甲酮  0.01 kg;
润滑剂乙烯基双硬脂酸酰胺                0.01 kg;
桔红色粉                                0.04 kg。
本发明产品的制备过程为:
1)上料、烘干:将聚丙烯PP、尼龙12、相容剂马来酸酐接枝聚丙烯、偶联剂γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷、抗氧剂丙酸十八醇酯、抗紫外线吸收剂2-羟基-4-辛氧基二苯甲酮、润滑剂乙烯基双硬脂酸酰胺、桔红色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为46:1双螺杆挤出机中,在190℃下将原料混炼成熔融状,再在侧喂口加入无碱长玻璃纤维,将全部原料都熔融后,再将熔融状的原料在235℃的挤出温度下挤出、挤出压力为10mpa,挤出真空度为-0.03mpa,挤出的管材牵引速度为3m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为25℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每150m一段,并将其盘卷;
5)检验、入库。
实施例3
先按以下配方称取原料:
聚丙烯                              7.1 kg;
尼龙11                              1.8 kg;
无碱长玻璃纤维                      0.6 kg;
相容剂马来酸酐接枝聚丙烯            0.1 kg;
偶联剂γ-氨基丙基三乙氧基硅烷       0.25 kg;
抗氧剂硫代二丙酸二月桂酯            0.03 kg;
抗紫外线吸收剂氯代苯并三唑          0.03 kg;
润滑剂乙烯基双硬脂酸酰胺            0.03 kg;
桔红色粉                            0.06 kg。
本发明产品的制备过程为:
1)上料、烘干:将聚丙烯PP、尼龙11、相容剂马来酸酐接枝聚丙烯、偶联剂γ-氨基丙基三乙氧基硅烷、抗氧剂硫代二丙酸二月桂酯、抗紫外线吸收剂氯代苯并三唑、润滑剂乙烯基双硬脂酸酰胺、桔红色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为44:1双螺杆挤出机中,在230℃下将原料混炼成熔融状,再在侧喂口加入无碱长玻璃纤维,将全部原料都熔融后,再将熔融状的原料在185℃的挤出温度下挤出、挤出压力为7mpa,挤出真空度为-0.04mpa,挤出的管材牵引速度为1m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为20℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每120m一段,并将其盘卷;
5)检验、入库。
实施例4
先按以下配方称取原料:
聚丙烯                                        7.2 kg;
尼龙12                                        1.9 kg;
无碱长玻璃纤维                                0.4 kg;
相容剂马来酸酐接枝聚丙烯                      0.3 kg;
偶联剂γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷   0.02 kg;
抗氧剂四季戊四醇酯                            0.04 kg;
抗紫外线吸收剂2-羟基-4-辛氧基二苯甲酮         0.04 kg;
润滑剂乙烯基双硬脂酸酰胺                      0.02 kg;
桔红色粉                                      0.04 kg。
本发明产品的制备过程为:
1)上料、烘干:将聚丙烯PP、尼龙12、相容剂马来酸酐接枝聚丙烯、偶联剂γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷、抗氧剂四季戊四醇酯、抗紫外线吸收剂2-羟基-4-辛氧基二苯甲酮、润滑剂乙烯基双硬脂酸酰胺、桔红色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为42:1双螺杆挤出机中,在210℃下将原料混炼成熔融状,再在侧喂口加入无碱长玻璃纤维,将全部原料都熔融后,再将熔融状的原料在210℃的挤出温度下挤出、挤出压力为8mpa,挤出真空度为-0.058mpa,挤出的管材牵引速度为2m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为18℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每140m一段,并将其盘卷;
5)检验、入库。
表一  本发明的FATP产品与传统的MPP管检测数据
Figure 2011104541101100002DEST_PATH_IMAGE002
其中,环片热压缩力的测试方法如下:从三根管材上各取300mm管段为试样,试样两段应垂直切平,放入电热鼓风干燥箱内,经(70±2)℃,2h处理,从干燥箱中取出试样,立即平放于试验机两压板间,以(5±2)mm/min速度压缩试样,读取外径压缩5%时的力为环片热压缩力,每段试样自从烘箱取出至压缩完成都应在2min内完成,取三个试样的试验结果的算术平均值为试验结果。
从表1可以看出,本发明的FATP管与传统的MPP管相比,拉伸强度、弯曲强度(即强度及耐蠕变性)、弯曲模量(地下抗变形能力)、环片热压缩力、缺口冲击强度都有很大的提高,同时由熔融指数的数据可知本发明的产品耐热性更好。

Claims (9)

1.非开挖专用电力波纹管的制备方法,其特征在于:按以下配方称取原料;
非开挖专用电力波纹管包含的原料及其质量百分含量为: 
聚丙烯          65-75%;
尼龙            15-20%;
玻璃纤维        2-7%;
相容剂          1-5%;
偶联剂          0.2-2.5%;
抗氧剂          0.1-0.5%;
抗紫外线吸收剂  0.1-0.5%;
润滑剂          0.1-0.4%;
色粉            0.4-1.0%;
包括以下步骤:
1)上料、烘干:将聚丙烯PP、尼龙PA、相容剂、偶联剂、抗氧剂、抗紫外线吸收剂、润滑剂、色粉投入挤出机的料斗混合均匀并烘干;
2)混炼、挤出:将烘干的原料送入螺杆长径比为42-46:1双螺杆挤出机中,在180-230℃下将原料混炼成熔融状,再在侧喂口加入玻璃纤维,将全部原料都熔融后,再将熔融状的原料在185-235℃的挤出温度下挤出、挤出压力为5-10 MPa,挤出真空度为-0.05~-0.03 MPa,挤出的管材牵引速度为1-3 m/min;
3)冷却、成型:挤出后产品用水冷却,冷却温度为15-25℃;
4)切割、盘卷:将冷却成型成的非开挖专用电力波纹管切割成每100-150m一段,并将其盘卷;
5)检验、入库。
2.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述相容剂为马来酸酐接枝聚丙烯。
3.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述尼龙为尼龙11或尼龙12。
4.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述玻璃纤维为无碱长玻璃纤维。
5.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述偶联剂为γ-氨基丙基三乙氧基硅烷或γ-(2,3-环氧丙氧基)丙基三甲氧基硅烷。
6.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述抗氧剂为下列中的一种:四季戊四醇酯、丙酸十八醇酯或硫代二丙酸二月桂酯。
7.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述抗紫外线吸收剂为氯代苯并三唑或2-羟基-4-辛氧基二苯甲酮。
8.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述润滑剂为乙烯基双硬脂酸酰胺。
9.根据权利要求1所述的非开挖专用电力波纹管的制备方法,其特征在于:所述色粉为桔红色粉。
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