CN111875861A - 一种阻燃电缆及其制备方法 - Google Patents
一种阻燃电缆及其制备方法 Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 102
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 238000002360 preparation method Methods 0.000 title abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 35
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- 239000003963 antioxidant agent Substances 0.000 claims abstract description 26
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- 229910000008 nickel(II) carbonate Inorganic materials 0.000 claims abstract description 18
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 claims abstract description 18
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 16
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- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims abstract description 13
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 34
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- 229910052751 metal Inorganic materials 0.000 claims description 20
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- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims description 9
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 claims description 5
- MZZYGYNZAOVRTG-UHFFFAOYSA-N 2-hydroxy-n-(1h-1,2,4-triazol-5-yl)benzamide Chemical compound OC1=CC=CC=C1C(=O)NC1=NC=NN1 MZZYGYNZAOVRTG-UHFFFAOYSA-N 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
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- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical group COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 5
- ZCWSUZJGZZFSHM-UHFFFAOYSA-N ethyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 ZCWSUZJGZZFSHM-UHFFFAOYSA-N 0.000 claims description 5
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- 238000007670 refining Methods 0.000 claims description 5
- GTRSAMFYSUBAGN-UHFFFAOYSA-N tris(2-chloropropyl) phosphate Chemical compound CC(Cl)COP(=O)(OCC(C)Cl)OCC(C)Cl GTRSAMFYSUBAGN-UHFFFAOYSA-N 0.000 claims description 5
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Abstract
本发明公开了一种阻燃电缆,阻燃护套按照重量份计,包括以下原料:聚氯乙烯100份、聚乙烯醇缩丁醛25‑35份、固体钙锌复合稳定剂3‑5份、碳酸镍30‑40份、纳米二氧化硅20‑30份、阻燃剂30‑50份、紫外线吸收剂1‑2份、陶土10‑12份、增塑剂4‑8份、抗氧剂8‑14份、防老剂1‑3份、润滑剂1‑3份。该阻燃电缆及其制备方法加入了纳米二氧化硅,使得本发明的电缆在具有阻燃的性能上同时具有防腐蚀性,使得在潮湿的环境条件下也可以使用,提高了使用寿命,降低了使用成本,而且纳米二氧化硅和增塑剂的作用下也提高了该电缆一定的力学性能,保证芯体的的承载力和稳定性,提高使用强度。
Description
技术领域
本发明属于电力设备技术领域,具体涉及一种阻燃电缆及其制备方法。
背景技术
电缆是一种电能或信号传输装置,通常是由几根或几组导线组成。随着经济的迅速发展,电缆在通讯、电力等领域的应用非常广泛。近年来,人们发现火灾事故中的人员致死原因80%以上与材料产生的浓烟和有毒气体有关。随着我国现代工业的迅速发展,安全防患措施也应越来越完善,在许多大型公共场所,为避免电缆着火造成的二次灾难(电缆燃烧时产生大量的烟雾和酸性气体),对专供传输电能和通讯信号使用的电线电缆,不仅要求具有在电缆及周围环境着火时,具有可阻止火焰蔓延等阻燃性能,并能维持电缆继续传输电能和通讯信号,而且在燃烧时还应具有低发烟量,产生气体腐蚀性低,利于工作人员安全撤离现场的性能,即应使电缆具有无卤、低烟、阻燃等性能。
而且现在的电缆在潮湿的空气中会发生腐蚀,尤其是在梅雨季节,长时间下雨,使得电缆发生腐蚀,从而损坏电缆,减少使用寿命,从而提高使用成本,因此我们需要一款新型的阻燃电缆及其制备方法来解决上述问题,满足人们的需求。
发明内容
本发明的目的在于提供一种阻燃电缆及其制备方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种阻燃电缆,包括导电金属导体、阻燃绝缘层和阻燃护套,所述阻燃绝缘层包裹在导电金属导体表面形成电缆芯,所述阻燃护套包裹在电缆芯的外表面,所述阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂30-40份、磷酸三苯酯1-5份、聚乙烯蜡1-5份、碳酸钙1-2份、氢氧化镁30-40份、对羟苯甲酸丙酯1-4份、氢氧化铝30-40份、乙烯基双硬脂酰胺0.5-1份、脂肪酸1-2份、促进剂0.8-1.3份、抗氧剂3-6份、硫化机0.8-1.3份、增塑剂2-4份;
所述阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛25-35份、固体钙锌复合稳定剂3-5份、碳酸镍30-40份、纳米二氧化硅20-30份、阻燃剂30-50份、紫外线吸收剂1-2份、陶土10-12份、增塑剂4-8份、抗氧剂8-14份、防老剂1-3份、润滑剂1-3份。
优选的是,所述阻燃剂为氢氧化镁、聚磷酸铵、纳米三氧化二锑、磷酸三(2-氯丙基)酯一种或多种的组合。
上述任一方案中优选的是,所述聚磷酸铵的粒径为30-50μm。
上述任一方案中优选的是,所述润滑剂为乙烯基三(2-甲氧基乙氧基)硅烷。
上述任一方案中优选的是,所述碳酸镍的粒径为10-25μm。
上述任一方案中优选的是,所述防老剂为2-巯基苯并咪唑、3-(N-水杨酰)氨基-1,2,4-三唑、2,2’-草酰胺双-(乙基3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)中的一种或几种的组合。
上述任一方案中优选的是,所述碳酸钙的粒径为10-20μm。
一种阻燃电缆的制备方法,按照先后顺序包括以下步骤:
S1:将导电金属导体绞制在耐高温纤维的外周,然后涂覆聚氨酯胶黏剂,使每两束耐高温纤维之间紧密贴合,缓慢升温至60℃后固化,制得耐高温芯体,接着在耐高温芯体的外表面被覆绝缘防腐电缆料,形成耐高温的防腐绝缘芯体;
S2:向混合搅拌机中加入低密度聚乙烯、PVC树脂,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到50℃时停止升温,向搅拌机中依次加入磷酸三苯酯、聚乙烯蜡、碳酸钙、氢氧化镁、对羟苯甲酸丙酯、氢氧化铝、乙烯基双硬脂酰胺,边加入边搅拌,然后以3℃/min的升温速率进行升温,在升温的过程中持续搅拌,当温度达到80℃时,停止升温,向搅拌机依次加入脂肪酸、促进剂、抗氧剂、硫化机、增塑剂,接着以每1℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到85℃时停止升温,保持0.5-1h,得混合物料;
S3:对上述混合料进行干燥处理,将混合物料放置到干燥机中,干燥机以10℃/min的升温速率进行升温,达到80-90℃时停止升温,并保持该温度2-4h,得到干燥的混合物料一;
S4:向混合搅拌机中加入聚氯乙烯、聚乙烯醇缩丁醛、固体钙锌复合稳定剂、碳酸镍、纳米二氧化硅,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到60℃时停止升温,再向其中依次加入阻燃剂、紫外线吸收剂、陶土、增塑剂、抗氧剂、防老剂、润滑剂,边加入边搅拌,全部加入后搅拌5min,然后8℃/min的升温速率进行升温,升温至90-120℃时停止升温,在此温度下搅拌30min,停止搅拌,等混合物料冷却至25℃后,备用;
S5:将上述备用的混合物料加入到炼塑机上,塑化5-10min后出料,在这之前将硫化机加热至140-180℃,然后将出料平铺在硫化机上,设定硫化机的压力为4-6MPa,对物料进行预热10-15min,然后以1MPa/min的升压速率进行升压,达到20-25MPa时,停止升压,保持压力不变热压10min后出料,得到干燥的混合物料二;
S6:通过塑料挤出机将混合物料一挤包在步骤S1中的耐高温的防腐绝缘芯体外层,得到具有阻燃聚乙烯绝缘层的电缆芯;
S7:通过塑料挤出机将混合物料二挤包在上述单根或者多根绞合的电缆芯外层,制得阻燃电缆。
优选的是,所述步骤S1中的导电金属导体为铜丝、镀锡铜丝或镀银铜丝。
上述任一方案中优选的是,所述步骤S1中耐高温纤维的主要成分为氧化铝、二氧化硅、碱金属氧化物中一种或多种的组合。
本发明的技术效果和优点:该阻燃电缆及其制备方法加入了纳米二氧化硅,使得本发明的电缆在具有阻燃的性能上同时具有防腐蚀性,使得在潮湿的环境条件下也可以使用,提高了使用寿命,降低了使用成本,而且纳米二氧化硅和增塑剂的作用下也提高了该电缆一定的力学性能,保证芯体的的承载力和稳定性,提高使用强度。
具体实施方式
下面将结合本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:
本实施例提供了一种阻燃电缆,包括导电金属导体、阻燃绝缘层和阻燃护套,阻燃绝缘层包裹在导电金属导体表面形成电缆芯,阻燃护套包裹在电缆芯的外表面,阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂30份、磷酸三苯酯1份、聚乙烯蜡1份、碳酸钙1份、碳酸钙的粒径为10μm,氢氧化镁30份、对羟苯甲酸丙酯1份、氢氧化铝30-份、乙烯基双硬脂酰胺0.5份、脂肪酸1份、促进剂0.8份、抗氧剂3份、硫化机0.8份、增塑剂2份;
阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛25份、固体钙锌复合稳定剂3份、碳酸镍30份、碳酸镍的粒径为10μm、纳米二氧化硅20,阻燃剂30份,阻燃剂为氢氧化镁、聚磷酸铵、聚磷酸铵的粒径为30μm,纳米三氧化二锑、磷酸三(2-氯丙基)酯一种或多种的组合,紫外线吸收剂1份、陶土10份、增塑剂4份、抗氧剂8份、防老剂1份、防老剂为2-巯基苯并咪唑、3-(N-水杨酰)氨基-1,2,4-三唑、2,2’-草酰胺双-(乙基3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)中的一种或几种的组合,润滑剂1份,润滑剂为乙烯基三(2-甲氧基乙氧基)硅烷。
针对上述阻燃电缆,本实施例还提供了一种阻燃电缆的制备方法,按照先后顺序包括以下步骤:
S1:将导电金属导体绞制在耐高温纤维的外周,导电金属导体为铜丝、镀锡铜丝或镀银铜丝,耐高温纤维的主要成分为氧化铝、二氧化硅、碱金属氧化物中一种或多种的组合,然后涂覆聚氨酯胶黏剂,使每两束耐高温纤维之间紧密贴合,缓慢升温至60℃后固化,制得耐高温芯体,接着在耐高温芯体的外表面被覆绝缘防腐电缆料,形成耐高温的防腐绝缘芯体;
S2:向混合搅拌机中加入低密度聚乙烯、PVC树脂,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到50℃时停止升温,向搅拌机中依次加入磷酸三苯酯、聚乙烯蜡、碳酸钙、氢氧化镁、对羟苯甲酸丙酯、氢氧化铝、乙烯基双硬脂酰胺,边加入边搅拌,然后以3℃/min的升温速率进行升温,在升温的过程中持续搅拌,当温度达到80℃时,停止升温,向搅拌机依次加入脂肪酸、促进剂、抗氧剂、硫化机、增塑剂,接着以每1℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到85℃时停止升温,保持0.5-1h,得混合物料;
S3:对上述混合料进行干燥处理,将混合物料放置到干燥机中,干燥机以10℃/min的升温速率进行升温,达到80-90℃时停止升温,并保持该温度2-4h,得到干燥的混合物料一;
S4:向混合搅拌机中加入聚氯乙烯、聚乙烯醇缩丁醛、固体钙锌复合稳定剂、碳酸镍、纳米二氧化硅,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到60℃时停止升温,再向其中依次加入阻燃剂、紫外线吸收剂、陶土、增塑剂、抗氧剂、防老剂、润滑剂,边加入边搅拌,全部加入后搅拌5min,然后8℃/min的升温速率进行升温,升温至90-120℃时停止升温,在此温度下搅拌30min,停止搅拌,等混合物料冷却至25℃后,备用;
S5:将上述备用的混合物料加入到炼塑机上,塑化5-10min后出料,在这之前将硫化机加热至140-180℃,然后将出料平铺在硫化机上,设定硫化机的压力为4-6MPa,对物料进行预热10-15min,然后以1MPa/min的升压速率进行升压,达到20-25MPa时,停止升压,保持压力不变热压10min后出料,得到干燥的混合物料二;
S6:通过塑料挤出机将混合物料一挤包在步骤S1中的耐高温的防腐绝缘芯体外层,得到具有阻燃聚乙烯绝缘层的电缆芯;
S7:通过塑料挤出机将混合物料二挤包在上述单根或者多根绞合的电缆芯外层,制得阻燃电缆。
实施例2:
本实施例提供了一种阻燃电缆,包括导电金属导体、阻燃绝缘层和阻燃护套,阻燃绝缘层包裹在导电金属导体表面形成电缆芯,阻燃护套包裹在电缆芯的外表面,阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂35份、磷酸三苯酯3份、聚乙烯蜡3份、碳酸钙1.5份、碳酸钙的粒径为15μm,氢氧化镁35份、对羟苯甲酸丙酯2份、氢氧化铝35份、乙烯基双硬脂酰胺0.7份、脂肪酸1.5份、促进剂1.0份、抗氧剂5份、硫化机1.1份、增塑剂3份;
阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛30份、固体钙锌复合稳定剂4份、碳酸镍35份、碳酸镍的粒径为17μm、纳米二氧化硅25份,阻燃剂40份,阻燃剂为氢氧化镁、聚磷酸铵、聚磷酸铵的粒径为40μm,纳米三氧化二锑、磷酸三(2-氯丙基)酯一种或多种的组合,紫外线吸收剂1.5份、陶土11份、增塑剂6份、抗氧剂11份、防老剂2份、防老剂为2-巯基苯并咪唑、3-(N-水杨酰)氨基-1,2,4-三唑、2,2’-草酰胺双-(乙基3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)中的一种或几种的组合,润滑剂2份,润滑剂为乙烯基三(2-甲氧基乙氧基)硅烷。
针对上述阻燃电缆,本实施例还提供了一种阻燃电缆的制备方法,按照先后顺序包括以下步骤:
S1:将导电金属导体绞制在耐高温纤维的外周,导电金属导体为铜丝、镀锡铜丝或镀银铜丝,耐高温纤维的主要成分为氧化铝、二氧化硅、碱金属氧化物中一种或多种的组合,然后涂覆聚氨酯胶黏剂,使每两束耐高温纤维之间紧密贴合,缓慢升温至60℃后固化,制得耐高温芯体,接着在耐高温芯体的外表面被覆绝缘防腐电缆料,形成耐高温的防腐绝缘芯体;
S2:向混合搅拌机中加入低密度聚乙烯、PVC树脂,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到50℃时停止升温,向搅拌机中依次加入磷酸三苯酯、聚乙烯蜡、碳酸钙、氢氧化镁、对羟苯甲酸丙酯、氢氧化铝、乙烯基双硬脂酰胺,边加入边搅拌,然后以3℃/min的升温速率进行升温,在升温的过程中持续搅拌,当温度达到80℃时,停止升温,向搅拌机依次加入脂肪酸、促进剂、抗氧剂、硫化机、增塑剂,接着以每1℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到85℃时停止升温,保持0.5-1h,得混合物料;
S3:对上述混合料进行干燥处理,将混合物料放置到干燥机中,干燥机以10℃/min的升温速率进行升温,达到80-90℃时停止升温,并保持该温度2-4h,得到干燥的混合物料一;
S4:向混合搅拌机中加入聚氯乙烯、聚乙烯醇缩丁醛、固体钙锌复合稳定剂、碳酸镍、纳米二氧化硅,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到60℃时停止升温,再向其中依次加入阻燃剂、紫外线吸收剂、陶土、增塑剂、抗氧剂、防老剂、润滑剂,边加入边搅拌,全部加入后搅拌5min,然后8℃/min的升温速率进行升温,升温至90-120℃时停止升温,在此温度下搅拌30min,停止搅拌,等混合物料冷却至25℃后,备用;
S5:将上述备用的混合物料加入到炼塑机上,塑化5-10min后出料,在这之前将硫化机加热至140-180℃,然后将出料平铺在硫化机上,设定硫化机的压力为4-6MPa,对物料进行预热10-15min,然后以1MPa/min的升压速率进行升压,达到20-25MPa时,停止升压,保持压力不变热压10min后出料,得到干燥的混合物料二;
S6:通过塑料挤出机将混合物料一挤包在步骤S1中的耐高温的防腐绝缘芯体外层,得到具有阻燃聚乙烯绝缘层的电缆芯;
S7:通过塑料挤出机将混合物料二挤包在上述单根或者多根绞合的电缆芯外层,制得阻燃电缆。
实施例3:
本实施例提供了一种阻燃电缆,包括导电金属导体、阻燃绝缘层和阻燃护套,阻燃绝缘层包裹在导电金属导体表面形成电缆芯,阻燃护套包裹在电缆芯的外表面,阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂40份、磷酸三苯酯5份、聚乙烯蜡5份、碳酸钙2份、碳酸钙的粒径为20μm,氢氧化镁40份、对羟苯甲酸丙酯4份、氢氧化铝40份、乙烯基双硬脂酰胺1份、脂肪酸2份、促进剂1.3份、抗氧剂6份、硫化机1.3份、增塑剂4份;
阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛35份、固体钙锌复合稳定剂5份、碳酸镍40份、碳酸镍的粒径为25μm,纳米二氧化硅30份,阻燃剂50份,阻燃剂为氢氧化镁、聚磷酸铵、聚磷酸铵的粒径为50μm,纳米三氧化二锑、磷酸三(2-氯丙基)酯一种或多种的组合,紫外线吸收剂2份、陶土12份、增塑剂8份、抗氧剂14份、防老剂3份、防老剂为2-巯基苯并咪唑、3-(N-水杨酰)氨基-1,2,4-三唑、2,2’-草酰胺双-(乙基3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)中的一种或几种的组合,润滑剂3份,润滑剂为乙烯基三(2-甲氧基乙氧基)硅烷。
针对上述阻燃电缆,本实施例还提供了一种阻燃电缆的制备方法,按照先后顺序包括以下步骤:
S1:将导电金属导体绞制在耐高温纤维的外周,导电金属导体为铜丝、镀锡铜丝或镀银铜丝,耐高温纤维的主要成分为氧化铝、二氧化硅、碱金属氧化物中一种或多种的组合,然后涂覆聚氨酯胶黏剂,使每两束耐高温纤维之间紧密贴合,缓慢升温至60℃后固化,制得耐高温芯体,接着在耐高温芯体的外表面被覆绝缘防腐电缆料,形成耐高温的防腐绝缘芯体;
S2:向混合搅拌机中加入低密度聚乙烯、PVC树脂,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到50℃时停止升温,向搅拌机中依次加入磷酸三苯酯、聚乙烯蜡、碳酸钙、氢氧化镁、对羟苯甲酸丙酯、氢氧化铝、乙烯基双硬脂酰胺,边加入边搅拌,然后以3℃/min的升温速率进行升温,在升温的过程中持续搅拌,当温度达到80℃时,停止升温,向搅拌机依次加入脂肪酸、促进剂、抗氧剂、硫化机、增塑剂,接着以每1℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到85℃时停止升温,保持0.5-1h,得混合物料;
S3:对上述混合料进行干燥处理,将混合物料放置到干燥机中,干燥机以10℃/min的升温速率进行升温,达到80-90℃时停止升温,并保持该温度2-4h,得到干燥的混合物料一;
S4:向混合搅拌机中加入聚氯乙烯、聚乙烯醇缩丁醛、固体钙锌复合稳定剂、碳酸镍、纳米二氧化硅,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到60℃时停止升温,再向其中依次加入阻燃剂、紫外线吸收剂、陶土、增塑剂、抗氧剂、防老剂、润滑剂,边加入边搅拌,全部加入后搅拌5min,然后8℃/min的升温速率进行升温,升温至90-120℃时停止升温,在此温度下搅拌30min,停止搅拌,等混合物料冷却至25℃后,备用;
S5:将上述备用的混合物料加入到炼塑机上,塑化5-10min后出料,在这之前将硫化机加热至140-180℃,然后将出料平铺在硫化机上,设定硫化机的压力为4-6MPa,对物料进行预热10-15min,然后以1MPa/min的升压速率进行升压,达到20-25MPa时,停止升压,保持压力不变热压10min后出料,得到干燥的混合物料二;
S6:通过塑料挤出机将混合物料一挤包在步骤S1中的耐高温的防腐绝缘芯体外层,得到具有阻燃聚乙烯绝缘层的电缆芯;
S7:通过塑料挤出机将混合物料二挤包在上述单根或者多根绞合的电缆芯外层,制得阻燃电缆。
表1.实施例1-3所制得的阻燃电缆的性能测试结果。
其中对照组1为:阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂29份、磷酸三苯酯0.9份、聚乙烯蜡0.9份、碳酸钙0.9份、氢氧化镁29份、对羟苯甲酸丙酯0.9份、氢氧化铝29份、乙烯基双硬脂酰胺0.4份、脂肪酸0.9份、促进剂0.7份、抗氧剂2.9份、硫化机0.7份、增塑剂1.9份;
所述阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛24份、固体钙锌复合稳定剂2份、碳酸镍29份、纳米二氧化硅19份、阻燃剂29份、紫外线吸收剂0.9份、陶土9份、增塑剂3份、抗氧剂7份、防老剂0.9份、润滑剂0.9份。
对照组2为:阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂41份、磷酸三苯酯6份、聚乙烯蜡6份、碳酸钙3份、氢氧化镁41份、对羟苯甲酸丙酯5份、氢氧化铝41份、乙烯基双硬脂酰胺1.1份、脂肪酸2.1份、促进剂1.4份、抗氧剂7份、硫化机1.4份、增塑剂5份;
所述阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛36份、固体钙锌复合稳定剂6份、碳酸镍41份、纳米二氧化硅31份、阻燃剂51份、紫外线吸收剂2.1份、陶土13份、增塑剂9份、抗氧剂15份、防老剂4份、润滑剂4份。
对照组1和对照组2均采用本发明制备方法制得阻燃电缆。
由表1可知,相对于对照组1和对照组2,按照本发明配方制得的阻燃电缆在拉伸强度、断裂伸长率、维卡软化点、马丁热稳定性和年腐蚀深度都有一定的提升,说明本发明的阻燃电缆及其制备方法使得阻燃电缆在具有阻燃的性能上同时具有防腐蚀性,提高了使用寿命,降低了使用成本,而且也提高了该电缆一定的力学性能,保证芯体的的承载力和稳定性,提高了使用强度。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的方法及技术内容作出些许的更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
Claims (10)
1.一种阻燃电缆,包括导电金属导体、阻燃绝缘层和阻燃护套,所述阻燃绝缘层包裹在导电金属导体表面形成电缆芯,所述阻燃护套包裹在电缆芯的外表面,其特征在于:所述阻燃绝缘层按照重量份计,包括以下原料:
低密度聚乙烯100份、PVC树脂30-40份、磷酸三苯酯1-5份、聚乙烯蜡1-5份、碳酸钙1-2份、氢氧化镁30-40份、对羟苯甲酸丙酯1-4份、氢氧化铝30-40份、乙烯基双硬脂酰胺0.5-1份、纳米二氧化硅20-30份、脂肪酸1-2份、促进剂0.8-1.3份、抗氧剂3-6份、硫化机0.8-1.3份、增塑剂2-4份;
所述阻燃护套按照重量份计,包括以下原料:
聚氯乙烯100份、聚乙烯醇缩丁醛25-35份、固体钙锌复合稳定剂3-5份、碳酸镍30-40份、阻燃剂30-50份、紫外线吸收剂1-2份、陶土10-12份、增塑剂4-8份、抗氧剂8-14份、防老剂1-3份、润滑剂1-3份。
2.根据权利要求1所述的一种阻燃电缆,其特征在于:所述阻燃剂为氢氧化镁、聚磷酸铵、纳米三氧化二锑、磷酸三(2-氯丙基)酯一种或多种的组合。
3.根据权利要求2所述的一种阻燃电缆,其特征在于:所述聚磷酸铵的粒径为30-50μm。
4.根据权利要求1所述的一种阻燃电缆,其特征在于:所述润滑剂为乙烯基三(2-甲氧基乙氧基)硅烷。
5.根据权利要求1所述的一种阻燃电缆,其特征在于:所述碳酸镍的粒径为10-25μm。
6.根据权利要求1所述的一种阻燃电缆,其特征在于:所述防老剂为2-巯基苯并咪唑、3-(N-水杨酰)氨基-1,2,4-三唑、2,2’-草酰胺双-(乙基3-(3,5-二叔丁基-4-羟基苯基)丙酸酯)中的一种或几种的组合。
7.根据权利要求1所述的一种阻燃电缆,其特征在于:所述碳酸钙的粒径为10-20μm。
8.一种根据权利要求1所述的阻燃电缆的制备方法,其特征在于:按照先后顺序包括以下步骤:
S1:将导电金属导体绞制在耐高温纤维的外周,然后涂覆聚氨酯胶黏剂,使每两束耐高温纤维之间紧密贴合,缓慢升温至60℃后固化,制得耐高温芯体,接着在耐高温芯体的外表面被覆绝缘防腐电缆料,形成耐高温的防腐绝缘芯体;
S2:向混合搅拌机中加入低密度聚乙烯、PVC树脂,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到50℃时停止升温,向搅拌机中依次加入磷酸三苯酯、聚乙烯蜡、碳酸钙、氢氧化镁、对羟苯甲酸丙酯、氢氧化铝、乙烯基双硬脂酰胺,边加入边搅拌,然后以3℃/min的升温速率进行升温,在升温的过程中持续搅拌,当温度达到80℃时,停止升温,向搅拌机依次加入脂肪酸、促进剂、抗氧剂、硫化机、增塑剂,接着以每1℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到85℃时停止升温,保持0.5-1h,得混合物料;
S3:对上述混合料进行干燥处理,将混合物料放置到干燥机中,干燥机以10℃/min的升温速率进行升温,达到80-90℃时停止升温,并保持该温度2-4h,得到干燥的混合物料一;
S4:向混合搅拌机中加入聚氯乙烯、聚乙烯醇缩丁醛、固体钙锌复合稳定剂、碳酸镍、纳米二氧化硅,然后以5℃/min的升温速率进行升温,在升温的过程中持续搅拌,当达到60℃时停止升温,再向其中依次加入阻燃剂、紫外线吸收剂、陶土、增塑剂、抗氧剂、防老剂、润滑剂,边加入边搅拌,全部加入后搅拌5min,然后8℃/min的升温速率进行升温,升温至90-120℃时停止升温,在此温度下搅拌30min,停止搅拌,等混合物料冷却至25℃后,备用;
S5:将上述备用的混合物料加入到炼塑机上,塑化5-10min后出料,在这之前将硫化机加热至140-180℃,然后将出料平铺在硫化机上,设定硫化机的压力为4-6MPa,对物料进行预热10-15min,然后以1MPa/min的升压速率进行升压,达到20-25MPa时,停止升压,保持压力不变热压10min后出料,得到干燥的混合物料二;
S6:通过塑料挤出机将混合物料一挤包在步骤S1中的耐高温的防腐绝缘芯体外层,得到具有阻燃聚乙烯绝缘层的电缆芯;
S7:通过塑料挤出机将混合物料二挤包在上述单根或者多根绞合的电缆芯外层,制得阻燃电缆。
9.根据权利要求8所述的一种阻燃电缆的制备方法,其特征在于:所述步骤S1中的导电金属导体为铜丝、镀锡铜丝或镀银铜丝。
10.根据权利要求8所述的一种阻燃电缆的制备方法,其特征在于:所述步骤S1中耐高温纤维的主要成分为氧化铝、二氧化硅、碱金属氧化物中一种或多种的组合。
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