CN109206856A - 一种绝缘复合材料以及该绝缘复合材料在街码中的应用 - Google Patents
一种绝缘复合材料以及该绝缘复合材料在街码中的应用 Download PDFInfo
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Abstract
本发明公开了一种绝缘复合材料以及该绝缘复合材料在街码中的应用,该复合材料由35‑50%的不饱和树脂、35‑50%的玻璃纤维、5‑10%的金刚砂填料、1‑2%的组合型低收缩添加剂、0.4‑2%的增稠剂、1‑3.5%的引发剂、0.03‑0.5%的着色剂、0.1‑0.7%的交联剂、0.05‑0.5%的脱模剂组成;其中所述不饱和树脂为环氧树脂,所述玻璃纤维为无碱玻璃纤维;所述组合型低收缩添加剂包括接枝型的芯壳聚合物、嵌段型的聚醋酸‑苯乙烯和改性的轻度交联的聚苯乙烯低收缩添加剂。本发明绝缘复合材料是一种热固性复合材料,具有强度高、重量轻、整体绝缘、无电腐蚀等优点,将其应用于街码中后,同时使制得的街码具有了优良的化学稳定性、优良的电气性能、较高的耐冲击力和稳定性等特点。
Description
技术领域
本发明涉及复合材料技术领域,具体地说,涉及一种绝缘复合材料以及该绝缘复合材料在街码中的应用。
背景技术
近几年,随着城市规划与建设的要求越来越高,市容美观越来越受到社会的广泛关注。目前城区配电网中采用的架空线路由于受廊道和同杆回路数的限制,许多街道输送容量跟不上社会用电的发展,出现了架空线路故障多、运行方式不灵活等问题,经常造成大面积停电,严重影响居民正常生活。另外,由于架空线路一般位于街道一侧,极易限制绿化带树木的生长高度;架空线路的横跨街道和其他线路在电力杆上的私拉乱扯,也会严重影响城市美观。因此受到带电线路影响和社会各方面干扰,城市架空线路的施工难度较大,且容易发生危及人身安全的断导线、漏电等事故。
而街码则是一种铺设电缆时用于拉直固定电缆的装置,可以方便城镇街道的架空线路布置。传统的街码种类有很多,主要有金属角铁街码,不锈钢街码,塑料街码等等,但是这些街码大都存在安全性能差、强度低、耐腐蚀性能差、电力损耗程度高等缺点。因此,目前亟须需要开发一种新型材料的街码来克服上述缺陷。
发明内容
本发明根据上述技术背景,提供一种绝缘复合材料以及该绝缘复合材料在街码中的应用。
为解决上述问题,本发明所采用的技术方案是:
一种绝缘复合材料,其特征在于,所述复合材料由35-50%的不饱和树脂、 35-50%的玻璃纤维、5-10%的金刚砂填料、1-2%的组合型低收缩添加剂、0.4-2%的增稠剂、1-3.5%的引发剂、0.03-0.5%的着色剂、0.1-0.7%的交联剂、 0.05-0.5%的脱模剂组成;
具体的,不饱和树脂为环氧树脂,其在加热、加压作用下进行化学反应,会交联固化成为不溶不熔物质,并且此反应是不可逆的,一经固化,再加压加热也不可能再度软化或流动,因此以其为原料所制成的材料刚性大、硬度高、耐温高、不易燃、制品尺寸稳定性好。本申请中的环氧树脂需满足以下要求:①粘度低,对玻璃纤维浸润性能好;②同增稠剂具有足够的反应性,满足增稠要求;③固化迅速,生产周期短,效率高;④固化物有足够的热态强度,便于制品的热脱模;⑤固化物有足够的韧性,制品发生某些变形时不开裂;⑥较低的收缩率。
填料为金刚砂填料,可进一步增强成品的抗折性能。
玻璃纤维为无碱玻璃纤维,且该无碱玻璃纤维选用直径在10-14um,长度在 5cm以下,R2O含量小于0.8%的无碱玻璃纤维,此种玻璃纤维与环氧树脂结合后强度高、重量轻、防腐蚀性能好。
组合型低收缩添加剂包括接枝型的芯壳聚合物、嵌段型的聚醋酸-苯乙烯和改性的轻度交联的聚苯乙烯低收缩添加剂,此组合型低收缩添加剂是通过局部松弛释放内应力补偿聚合收缩,从而达到降低收缩率的效果。
进一步地,所述增稠剂为氧化镁,其具体要求为:MgO≥90%,吸碘值 60-120mg/g,水分≤0.5%,150目,筛余物0.01%,白度好,分散性好。
进一步地,所述引发剂为表面带有Si-OH活性团的活性二氧化硅,其粒度为 10-20um,表面积为50-400㎡/g。
进一步地,所述着色剂为无机颜料,且无机颜料的选择优选为:白色颜料:红石型钛白粉;黄色颜料:钛黄;橙色颜料:联苯胺橙;紫色颜料:钴紫;红色颜料:正红;绿色颜料:氧化铬绿;蓝色颜料:钴蓝;黑色颜料:铁黑;银色颜料:铝粉;金色颜料:青铜粉。
进一步地,所述交联剂为二亚乙基三胺,二亚乙基三胺又称二乙三胺,为无色液体,沸点207℃,密度0.954克/立方厘米,折光率1.5,闪点94℃。
进一步地,所述脱模剂为聚苯乙烯脱模剂,由聚苯乙烯5份与甲苯95份混合,放置数天搅拌制得。
本发明一种绝缘复合材料,通过如下方法制得:
步骤一:
①将35-50%的不饱和树脂、1-2%的组合型低收缩添加剂、0.03-0.5%的着色剂倒入配料釜中,使用顶入式搅拌器在600-1200rpm条件下均匀搅拌2-8min;
②将1-3.5%引发剂倒入配料釜中,与不饱和树脂、组合型低收缩添加剂、着色剂混合,再使用顶入式搅拌器在600-1200rpm条件下均匀搅拌2-8min;
③在搅拌作用下加入0.1-0.7%的交联剂、0.4-2%增稠剂、0.05-0.5%脱模剂,匀速搅拌0.5-5min,之后转入低速搅拌即100-500rpm;
④在低速搅拌的条件下加入5-10%金刚砂填料,匀速搅拌1-10min;
⑤在上述所列各组分完全分散后,停止搅拌,形成树脂糊,静置待用;
步骤二:
上SMC生产线生产,将步骤一中得到的树脂糊通过树脂糊输送平台输送到承载薄膜上,承载薄膜两张一组;涂布树脂糊的下承载薄膜在机组的牵引下进入玻璃纤维沉降室,将35-50%的玻璃纤维均匀沉降在树脂糊上,达到要求的沉降量后,下、上承载薄膜将树脂糊和玻璃纤维紧紧压在一起,经过多次反复,使玻璃纤维上浸渍树脂并赶走其中的气泡,形成密实而均匀的连续片料,即为 SMC片状模塑料;
步骤三:
将步骤二成型后的SMC片状模塑料经裁剪后置于模压机中进行高温成型,成型压力为8~40MPa,成型温度为分段式升温及保温,最终成型温度为320~ 340℃,之后随炉体降温,得到成品。
本发明在街码中的应用方法如下:将制得的绝缘复合材料通过一次模压一体成型,制成街码。
本发明的有益效果为:该绝缘复合材料是一种热固性复合材料,具有强度高、重量轻、整体绝缘、无电腐蚀、耐水、耐热、耐寒、防火、防腐蚀等诸多优点。
而将本发明应用于街码中后,同时使制得的街码具有了优良的化学稳定性,耐水、耐热、耐寒、耐腐蚀;优良的电气性能,产品整体绝缘,不会因电线老化或其他原因造成的电线破损等而导电形成安全事故,同时可以避免电力的损耗;强度高,重量轻,运输方便,施工简捷,产品表面光滑摩擦系数小,不损伤电缆,不蠕变,可设计性好。另外街码是由本申请中的绝缘复合材料通过一次模压一体成型制成的,故街码产品的整体性能高,使用寿命长,具有较高的耐冲击力和稳定性。
具体实施方式
下面将结合本发明的具体实施例,对本发明的实施方式作进一步详细描述。以下实施例用于说明本发明,但不能用来限制本发明的范围。
实施例1-3:
1、制备树脂糊
①将37%的不饱和树脂:环氧树脂、酚醛树脂、不饱和聚酯树脂中的一种,分别与1%的组合型低收缩添加剂、0.2%的无机颜料倒入配料釜中,使用顶入式搅拌器1000rpm均匀搅拌5min;
②将2.5%的引发剂倒入配料釜中,与环氧树脂、酚醛树脂、不饱和聚酯树脂中的一种、组合型低收缩添加剂、无机颜料混合,再使用顶入式搅拌器1000rpm 均匀搅拌5min;
③在搅拌作用下加入0.6%的交联剂、0.5%的增稠剂、0.2%的脱模剂,匀速搅拌3min,之后转入低速搅拌,即300rpm;
④在低速搅拌下加入8%金刚砂填料,匀速搅拌5min;
⑤在上述所列各组分完全分散后,停止搅拌,形成树脂糊,静置待用;
2、上SMC生产线生产,
将步骤1得到的树脂糊通过树脂糊输送平台输送到承载薄膜上,承载薄膜两张一组;涂布树脂糊的下承载薄膜在机组的牵引下进入玻璃纤维沉降室,将 50%的无碱玻璃纤维均匀沉降在树脂糊上,达到要求的沉降量后,下、上承载薄膜将树脂糊和无碱玻璃纤维紧紧压在一起,经过多次反复,使无碱玻璃纤维浸渍树脂并赶走其中的气泡,形成密实而均匀的连续片料,即SMC片状模塑料。
3、高温成型,
将步骤2成型后的片料根据实用物品大小裁剪后置于模压机中进行高温成型,成型压力为12MPa,成型温度为分段式升温100-150℃、150-200℃、200-300℃及300℃保温,最终成型温度为320℃,之后随炉体降温,得到成品。
在上述1-3的实施例中,取无碱玻璃纤维、填料、组合型低收缩添加剂引发剂、增稠剂、着色剂和脱模剂、交联剂,每次比例中的含量固定不变;取酚醛树脂、不饱和聚酯、环氧树脂等量依次制作成品,结果如下:
不饱和树脂名称 | 介电强度 | 介电损失角正切 |
酚醛树脂 | 4.2-5.0 | (1.2-2.0)*10<sup>-2</sup> |
不饱和聚酯 | 4.0-4.8 | (0.9-1.5)*10<sup>-2</sup> |
环氧树脂 | 4.7-5.2 | (1.7-2.5)*10<sup>-2</sup> |
通过介电强度、和介电损失角正切对比,介电强度越大绝缘性越好,发现使用环氧树脂时绝缘性显示优越,因此,本发明使用的不饱和树脂为环氧树脂。
实施例4:
1、制备树脂糊
①将35%的环氧树脂分别与2%的组合型低收缩添加剂、0.4%的无机颜料倒入配料釜中,使用顶入式搅拌器1000rpm均匀搅拌5min;
②将2.5%的引发剂倒入配料釜中,与环氧树脂、组合型低收缩添加剂、无机颜料混合,再使用顶入式搅拌器1000rpm均匀搅拌5min;
③在搅拌作用下加入0.3%的交联剂、1.5%的增稠剂、0.3%的脱模剂,匀速搅拌3min,之后转入低速搅拌,即300rpm;
④在低速搅拌下加入8%金刚砂填料,匀速搅拌5min;
⑤在上述所列各组分完全分散后,停止搅拌,形成树脂糊,静置待用;
2、上SMC生产线生产,
将步骤1得到的树脂糊通过树脂糊输送平台输送到承载薄膜上,承载薄膜两张一组;涂布树脂糊的下承载薄膜在机组的牵引下进入玻璃纤维沉降室,将 50%的无碱玻璃纤维均匀沉降在树脂糊上,达到要求的沉降量后,下、上承载薄膜将树脂糊和无碱玻璃纤维紧紧压在一起,经过多次反复,使无碱玻璃纤维浸渍树脂并赶走其中的气泡,形成密实而均匀的连续片料,即SMC片状模塑料。
3、高温成型,
将步骤2成型后的片料根据实用物品大小裁剪后置于模压机中进行高温成型,成型压力为12MPa,成型温度为分段式升温100-150℃、150-200℃、200-300℃及300℃保温,最终成型温度为320℃,之后随炉体降温,得到成品。
实施例5-9:
将实施例4中步骤2的无碱玻璃纤维比例分别修改为45%、40%、35%、30%、25%,根据玻璃纤维与环氧树脂的含量需整体保证在85%的原则下,将步骤1中的环氧树脂比例相应修改为40%、45%、50%、55%、60%,其他原料的比例固定不变,依次制作成品。
鉴于本发明绝缘复合材料的机械性能是由无碱玻璃纤维决定的,因此实施例4-9通过改变无碱玻璃纤维的用量,经多次验证对比,确定了无碱玻璃纤维使用量的多少对本发明的机械性能的影响:
由上表可以看出,根据产品实用性能的要求,确定无碱玻璃纤维的用量为 35%-50%。
实施例10;
1、制备树脂糊
①将45%的环氧树脂分别与1.5%的组合型低收缩添加剂、0.1%的无机颜料倒入配料釜中,使用顶入式搅拌器1000rpm均匀搅拌7min;
②将2.5%的引发剂倒入配料釜中,与环氧树脂、组合型低收缩添加剂、无机颜料混合,再使用顶入式搅拌器1000rpm均匀搅拌7min;
③在搅拌作用下加入0.1%的交联剂、0.6%的增稠剂、0.2%的脱模剂,匀速搅拌5min,之后转入低速搅拌,即300rpm;
④在低速搅拌下加入5%金刚砂填料,匀速搅拌7min;
⑤在上述所列各组分完全分散后,停止搅拌,形成树脂糊,静置待用;
2、上SMC生产线生产,
将步骤1得到的树脂糊通过树脂糊输送平台输送到承载薄膜上,承载薄膜两张一组;涂布树脂糊的下承载薄膜在机组的牵引下进入玻璃纤维沉降室,将 45%的无碱玻璃纤维均匀沉降在树脂糊上,达到要求的沉降量后,下、上承载薄膜将树脂糊和无碱玻璃纤维紧紧压在一起,经过多次反复,使无碱玻璃纤维浸渍树脂并赶走其中的气泡,形成密实而均匀的连续片料,即SMC片状模塑料。
3、高温成型,
将步骤2成型后的片料根据实用物品大小裁剪后置于模压机中进行高温成型,成型压力为12MPa,成型温度为分段式升温100-150℃、150-250℃、250-300℃及300℃保温,最终成型温度为320℃,之后随炉体降温,得到成品。
实施例11:
1、制备树脂糊
①将40%的环氧树脂分别与1.5%的组合型低收缩添加剂、0.25%的无机颜料倒入配料釜中,使用顶入式搅拌器1000rpm均匀搅拌7min;
②将2.5%的引发剂倒入配料釜中,与环氧树脂、组合型低收缩添加剂、无机颜料混合,再使用顶入式搅拌器1000rpm均匀搅拌7min;
③在搅拌作用下加入0.25%的交联剂、0.4%的增稠剂、0.1%的脱模剂,匀速搅拌5min,之后转入低速搅拌,即300rpm;
④在低速搅拌下加入8%金刚砂填料,匀速搅拌7min;
⑤在上述所列各组分完全分散后,停止搅拌,形成树脂糊,静置待用;
2、上SMC生产线生产,
将步骤1得到的树脂糊通过树脂糊输送平台输送到承载薄膜上,承载薄膜两张一组;涂布树脂糊的下承载薄膜在机组的牵引下进入玻璃纤维沉降室,将 47%得到无碱玻璃纤维均匀沉降在树脂糊上,达到要求的沉降量后,下、上承载薄膜将树脂糊和无碱玻璃纤维紧紧压在一起,经过多次反复,使无碱玻璃纤维浸渍树脂并赶走其中的气泡,形成密实而均匀的连续片料,即SMC片状模塑料。
3、高温成型,
将步骤2成型后的片料根据实用物品大小裁剪后置于模压机中进行高温成型,成型压力为12MPa,成型温度为分段式升温100-150℃、150-200℃、200-300℃及300℃保温,最终成型温度为330℃,之后随炉体降温,得到成品。
将上述实施例10、实施例11制成的绝缘复合材料通过一次模压一体成型,制成街码样品1和街码样品2,并对两个街码样品进行相关实验检测,获得下表:
实验项目 | 单位 | 街码样品1 | 街码样品2 |
抗拉强度 | Mpa | 195 | 185 |
热变温度 | ℃ | 290 | 280 |
耐低温温度 | ℃ | -150 | -140 |
绝缘抗性 | Ω | 1.5*10<sup>3</sup> | 1.5*10<sup>3</sup> |
耐电压 | Kv/mm | 14 | 14 |
耐燃性 | V-0 | V-0 | |
成品收缩率 | % | 0.11 | 0.11 |
成品比重 | g/cm<sup>3</sup> | 1.9 | 1.8 |
上表表示所制成的街码成品的理性指标均达到了实用标准。
采用本发明绝缘复合材料制得的街码具有如下优点:
1)强度高、重量轻、重量只有钢的1/4,运输方便,施工简捷;
2)产品表面光滑摩擦系数小,不损伤电缆,不蠕变,可设计性好;
3)产品整体绝缘,无电腐蚀,可防止产生涡流;
4)耐水性好,可以长期在潮湿或水中使用;
5)耐热,耐寒,防火性能优,能在-50℃---130℃下使用;
6)防腐蚀,不生锈,使用寿命长(室内50年),免维护;
7)此街码的材料没有回收利用价值,可以杜绝盗窃现象的发生。
显然所描述的实施例是本发明的一部分实施例,而不是全部的实施例。本发明也不局限于上述的优选的实施方式,任何人应该得知在本发明的启示下做出的变化,凡是与发明具有相同或者相近似的技术方案,均属于本发明的保护范围。
Claims (10)
1.一种绝缘复合材料,其特征在于,所述复合材料由35-50%的不饱和树脂、35-50%的玻璃纤维、5-10%的金刚砂填料、1-2%的组合型低收缩添加剂、0.4-2%的增稠剂、1-3.5%的引发剂、0.03-0.5%的着色剂、0.1-0.7%的交联剂、0.05-0.5%的脱模剂组成;其中所述不饱和树脂为环氧树脂,所述玻璃纤维为无碱玻璃纤维;所述组合型低收缩添加剂包括接枝型的芯壳聚合物、嵌段型的聚醋酸-苯乙烯和改性的轻度交联的聚苯乙烯低收缩添加剂。
2.根据权利要求1所述的一种绝缘复合材料,其特征在于:所述无碱玻璃纤维为直径在10-14um,长度在5cm以下,R2O含量小于0.8%的无碱玻璃纤维。
3.根据权利要求1所述的一种绝缘复合材料,其特征在于:所述增稠剂为氧化镁,其具体要求为:MgO≥90%,吸碘值60-120mg/g,水分≤0.5%,150目,筛余物0.01%。
4.根据权利要求1所述的一种绝缘复合材料,其特征在于:所述引发剂为表面带有Si-OH活性团的活性二氧化硅,其粒度为10-20um,表面积为50-400㎡/g。
5.根据权利要求1所述的一种绝缘复合材料,其特征在于:所述着色剂为无机颜料。
6.根据权利要求5所述的一种绝缘复合材料,其特征在于:所述无机颜料的选择优选为:白色颜料:红石型钛白粉;黄色颜料:钛黄;橙色颜料:联苯胺橙;紫色颜料:钴紫;红色颜料:正红;绿色颜料:氧化铬绿;蓝色颜料:钴蓝;黑色颜料:铁黑;银色颜料:铝粉;金色颜料:青铜粉。
7.根据权利要求1所述的一种绝缘复合材料,其特征在于:所述交联剂为二亚乙基三胺。
8.根据权利要求1所述的一种绝缘复合材料,其特征在于:所述脱模剂为聚苯乙烯脱模剂,由聚苯乙烯5份与甲苯95份混合,放置数天搅拌制得。
9.根据权利要求1所述的一种绝缘复合材料,其特征在于:通过如下方法制得:
步骤一:
①将35-50%的不饱和树脂、1-2%的组合型低收缩添加剂、0.03-0.5%的着色剂倒入配料釜中,使用顶入式搅拌器在600-1200rpm条件下均匀搅拌2-8min;
②将1-3.5%引发剂倒入配料釜中,与不饱和树脂、组合型低收缩添加剂、着色剂混合,再使用顶入式搅拌器在600-1200rpm条件下均匀搅拌2-8min;
③在搅拌作用下加入0.1-0.7%的交联剂、0.4-2%增稠剂、0.05-0.5%脱模剂,匀速搅拌0.5-5min,之后转入低速搅拌,即100-500rpm;
④在低速搅拌的条件下加入5-10%金刚砂填料,匀速搅拌1-10min;
⑤在上述所列各组分完全分散后,停止搅拌,形成树脂糊,静置待用;
步骤二:
上SMC生产线生产,将步骤一中得到的树脂糊通过树脂糊输送平台输送到承载薄膜上,承载薄膜两张一组;涂布树脂糊的下承载薄膜在机组的牵引下进入玻璃纤维沉降室,将35-50%的玻璃纤维均匀沉降在树脂糊上,达到要求的沉降量后,下、上承载薄膜将树脂糊和玻璃纤维紧紧压在一起,经过多次反复,使玻璃纤维浸渍树脂并赶走其中的气泡,形成密实而均匀的连续片料,即为SMC片状模塑料;
步骤三:
将步骤二成型后的SMC片状模塑料经裁剪后置于模压机中进行高温成型,成型压力为8~40MPa,成型温度为分段式升温及保温,最终成型温度为320~340℃,之后随炉体降温,得到成品。
10.一种权利要求1所述绝缘复合材料在街码中的应用,其特征在于:将所述绝缘复合材料通过一次模压一体成型,制成街码。
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