CN109318560A - 一种耐压双层复合管件及其制备工艺 - Google Patents
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Abstract
本发明提出一种耐压双层复合管件及其制备工艺,涉及复合管材领域。本发明提供一种耐压双层复合管件的内层包括以下配比的原料:PVC树脂100份,钙锌热稳定剂3‑8份,无机填料5‑25份,加工改性助剂0.5‑4份,抗冲改性剂1‑10份,润滑剂0.5‑3份,环氧脂1‑5份,抗氧剂0.1‑1份,颜料0.01‑5份。其制备工艺包括以下步骤:按照外层原料和内层原料的配比分别进行加热、高速捏合和冷混,再分别注入第一料筒和第二料筒中;将第一料筒内的熔料注入模腔,在熔料仍呈熔融状态时将第二料筒的熔料注入模腔;保压冷却,等模腔内的熔料冷却成型后进行脱模,并对管件进行修剪包装。本发明有效提高了管件的耐压耐候性能及其使用寿命,减轻了管件的重量。
Description
技术领域
本发明涉及复合管材领域,更具体地,涉及一种耐压双层复合管件及其制备工艺。
背景技术
目前,PVC直径≥160mm以上大规格供水管件作为供水系统的一个重要器件,在自来水厂,工业建筑室内供水,市政工程,海洋养殖等行业普遍应用。PVC供水管件的使用安装基本采用明装方式,并与供水压力泵相应的管道连接使用。明装的管件裸露在室外易受到外力撞击和挤压,而且在光照较强的环境中时其耐压耐候性能绝定了整个供水系统的运行和使用。在此种条件下大规格PVC供水管件,在试压和长期使用过程易出现变色、破裂、漏水等现象。
为了避免上述情况发生,常规PVC供水管件通过在配方中加入抗冲、抗老化、改性剂、填料等来增强管件的物理机械性能,然而这些方法单纯从增加壁厚、改善模具流道和增加材料配方的耐压、冲击性能方面解决液压性能和耐候性能,不利于使用过程中的安装,增加了生产成本,降低了生产效率,也造成了材料加工性流动性降低,且并不能极大提升管件的耐压耐候性能。
发明内容
本发明为克服上述现有技术所述的管材耐压性能低等缺陷,提供一种耐压双层复合管件及其制备工艺,包括第一方案和第二方案,能有效提高管材的耐压耐候性能及其使用寿命。
为解决上述技术问题,本发明的第一方案如下:
一种耐压双层复合管件,包括内层和外层,其中所述内层包括以下配比的原料:PVC树脂100份,钙锌热稳定剂/有机锡热稳定剂3-8份,无机填料5-25份,加工改性助剂0.5-4份,抗冲改性剂1-10份,润滑剂0.5-3份,环氧脂1-5份,抗氧剂0.1-1份,颜料0.01-5份。该管件内层采用无毒环保钙锌体系配方,优化了内层的韧性和耐压效果。
优选地,外层的原料包括ASA或PMMA和色母,ASA外层能进一步增强管件组合体的耐冲击、耐压、耐候性能,且可添加各种颜色色母粒进行着色,从而满足市场需求。
优选地,复合管件适用范围为管件直径大于或等于160以上的大规格供水管件。
上述耐压双层复合管件的制备方法,包括以下步骤:
S1:按照外层原料和内层原料的配比分别进行加热、高速捏合和冷混,再分别注入第一料筒和第二料筒中;
S2:将第一料筒内的熔料注入模腔,在熔料仍呈熔融状态时将第二料筒的熔料注入模腔;
S3:保压冷却,等模腔内的熔料冷却成型后进行脱模,并对管件进行修剪包装。
该制备工艺采用二层注射成型方法,使用双移动螺杆注射系统进行注塑。具体实施过程中第一料筒熔料注入模腔时,接触模腔壁的熔料由于受冷固化,而其余熔料仍呈可流动的熔融状态,此时启动第二料筒继续注入模腔,这样即可获得外层熔料均匀包覆内从熔料的塑料管件。此外,还可以在原制备方法上对模具和设备进行改进,如改变模具模块、加料装置、成型方式,从而实现管件内外层在同一机台上分布进行注塑成型,达到双层注塑效果。
本发明的第二方案具体如下:
一种耐压双层复合管件,其内层包括以下配比的原料:PVC树脂100份,无机填料5-25份,硫醇锡稳定剂1-3份,加工改性助剂1-4份,抗冲改性剂1-10份,润滑剂2-5份,抗氧剂0.1-1份,颜料0.01-5份。该管件内层采用卫生级有机锡体系配方,优化了内层的韧性和耐压效果。
优选地,外层的原料包括ASA或PMMA和色母,ASA外层能进一步增强管件组合体的耐冲击、耐压、耐候性能,且可添加各种颜色色母粒进行着色,从而满足市场需求。
优选地,复合管件适用范围为管件直径大于或等于160以上的大规格供水管件。
上述耐压双层复合管件的制备方法与第一方案相同。
与现有技术相比,本发明技术方案的有益效果是:有效提高了管件的耐压耐候性能及其使用寿命,减轻了管件的重量,方便管件的安装和粘接,满足市场需求。
附图说明
图1为本实施例的一种耐压双层复合管件的制备方法流程图。
具体实施方式
附图仅用于示例性说明,不能理解为对本专利的限制;
为了更好说明本实施例,附图某些部件会有省略、放大或缩小,并不代表实际产品的尺寸;
对于本领域技术人员来说,附图中某些公知结构及其说明可能省略是可以理解的。
下面结合附图和实施例对本发明的技术方案做进一步的说明。
实施例1
本实施例中,一种耐压双层复合管件的内层原料配比为PVC树脂100份,钙锌热稳定剂3-8份,无机填料5-25份,加工改性助剂0.5-4份,抗冲改性剂1-10份,润滑剂0.5-3份,环氧脂1-5份,抗氧剂0.1-1份,颜料0.01-5份;外层原料为ASA和色母粒。
耐压双层复合管材的制备过程如图1所示,为本实施例的一种耐压双层复合管件的制备方法流程图,具体步骤如下:
第一步:将外层原料和内层原料按配比分别进行加热、高速捏合和冷混,将熔融状态的原料分别注入到双移动螺杆注射系统中的第一料筒和第二料筒中。
第二步:将第一料筒内的熔料注入模腔中,当注入模腔的熔料仍呈可流动的熔融状态时气动第二料筒,将第二料筒内的熔料注入模腔中。
第三步:保压冷却,等模腔内的熔料冷却成型后进行脱模,并对成型后的管件进行修剪包装。
该制备工艺采用二层注射成型方法,使用双移动螺杆注射系统进行注塑,该设备设置有一个公用的交叉喷嘴和两个分开设置的料筒。具体实施过程中第一料筒熔料注入模腔时,接触模腔壁的熔料由于受冷固化,而其余熔料仍呈可流动的熔融状态,此时启动第二料筒继续注入模腔,这样即可获得外层熔料均匀包覆内从熔料的塑料管件。此外,还可以在原制备方法上对模具和设备进行改进,如改变模具模块、加料装置、成型方式,从而实现管件内外层在同一机台上分布进行注塑成型,达到双层注塑效果。
实施例2
本实施例中,管件的内层原料配比为PVC树脂100份,无机填料5-25份,硫醇锡稳定剂1-3份,加工改性助剂1-4份,抗冲改性剂1-10份,润滑剂2-5份,抗氧剂0.1-1份,颜料0.01-5份;外层原料为ASA和色母粒。该管件的制备方法同实施例1。
相同或相似的标号对应相同或相似的部件;
附图中描述位置关系的用语仅用于示例性说明,不能理解为对本专利的限制;
显然,本发明的上述实施例仅仅是为清楚地说明本发明所作的举例,而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明权利要求的保护范围之内。
Claims (8)
1.一种耐压双层复合管件,其特征在于:所述管件包括内层和外层,其中所述内层包括以下配比的原料:PVC树脂100份,钙锌热稳定剂3-8份,无机填料5-25份,加工改性助剂0.5-4份,抗冲改性剂1-10份,润滑剂0.5-3份,环氧脂1-5份,抗氧剂0.1-1份,颜料0.01-5份。
2.根据权利要求1所述的一种耐压双层复合管件,其特征在于:所述外层的原料包括ASA或PMMA和色母。
3.根据权利要求2所述的一种耐压双层复合管件,其特征在于:所述复合管件适用范围为管件直径大于或等于160mm以上的大规格供水管件。
4.如1-3任一项所述的一种耐压双层复合管件的制备工艺,其特征在于:包括以下步骤:
S1:按照外层原料和内层原料的配比分别进行加热、高速捏合和冷混,再分别注入第一料筒和第二料筒中;
S2:将第一料筒内的熔料注入模腔,在熔料仍呈熔融状态时将第二料筒的熔料注入模腔;
S3:保压冷却,等模腔内的熔料冷却成型后进行脱模,并对管件进行修剪包装。
5.一种耐压双层复合管件,其特征在于:所述管件包括内层和外层,其中所述内层包括以下配比的原料:PVC树脂100份,无机填料5-25份,硫醇锡稳定剂1-3份,加工改性助剂1-4份,抗冲改性剂1-10份,润滑剂2-5份,抗氧剂0.1-1份,颜料0.01-5份。
6.根据权利要求4所述的一种耐压双层复合管件,其特征在于:所述外层的原料包括ASA或PMMA和色母。
7.根据权利要求5所述的一种耐压双层复合管件,其特征在于:所述复合管件适用范围为管件直径大于或等于160mm以上的大规格供水管件。
8.如5-7任一项所述的一种耐压双层复合管件的制备工艺,其特征在于:包括以下步骤:
S1:按照外层原料和内层原料的配比分别进行加热、高速捏合和冷混,再分别注入第一料筒和第二料筒中;
S2:将第一料筒内的熔料注入模腔,在熔料仍呈熔融状态时将第二料筒的熔料注入模腔;
S3:保压冷却,等模腔内的熔料冷却成型后进行脱模,并对管件进行修剪包装。
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