CN112852062A - 一种用于替代行李箱密封条丁基不干胶的低密度海绵胶料及其复合挤出工艺 - Google Patents
一种用于替代行李箱密封条丁基不干胶的低密度海绵胶料及其复合挤出工艺 Download PDFInfo
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Abstract
本发明公开了一种低密度海绵胶料,包括按重量份计的如下组分:EPDM生胶100份,氧化锌5‑10份,硬脂酸1‑2份,碳黑80‑100份,填充剂60‑80份,软化油60‑80份,油膏5‑10份,加工助剂1‑3份,防老剂1‑2份,硫磺0.5‑1份,硫化剂DTDM‑80 0.8‑1.5份,硫化促进剂3.5‑5份,发泡剂OBSH‑75 5‑8份,发泡剂ADC‑75 2‑5份,吸湿剂2‑5份。本发明还提供了一种汽车行李箱密封条及其挤出工艺。本发明的低密度海绵胶料,可通过与其它胶料一体挤出来替代传统的离线灌丁基不干胶起到密封防水作用,大大简化了汽车行李箱密封条的制备工艺。
Description
技术领域
本发明涉及汽车密封条技术领域,具体涉及一种低密度海绵胶料,由所述低密度海绵胶料制备而成的汽车行李箱密封条及其挤出工艺。
背景技术
密封条是用于密封并起到减震、防水、隔音、隔热、防尘、固定等作用的产品,从80年代起密封条先后被应用到汽车、门窗、机柜、冰箱、集装箱等各种行业,并根据不同行业的要求,先后研发出了特有的汽车密封条、机械密封条、门窗密封条等产品。汽车整车质量的一项重要指标是密封性,而汽车密封条产品正是决议这一指标优劣的重要零部件之一。汽车密封条被普遍应用于汽车前后风挡、车门、车窗、座椅、天窗、发动机舱、后备箱等车身部位,除具有密封、减震、防水、防尘、隔音、装饰等功用外还起到填补车身部件之间的间隙,弥补装配误差等作用,对司乘人员及整车起到保护和维护。
对于汽车行李箱密封条,既要求具备密封性,又要求具备防水性。目前,汽车行李箱密封条是采用离线用灌胶机(打胶机)向密封条中注入丁基不干胶来达到密封和防水的目的(附图1)。但是,这种不干胶材料加工工艺复杂,需要在橡胶密封条加工完成后,使用专用设备进行不干胶注入;并且,这种不干胶材料本身对车身钣金的有污染,有异味,成本高和使用年限短。
发明内容
本发明要解决的技术问题是提供一种低密度海绵胶料,该低密度海绵胶料可通过与其他胶料一体挤出来替代传统的离线灌丁基不干胶起到密封防水作用,大大简化了汽车行李箱密封条的制备工艺。
为了解决上述技术问题,本发明提供了如下的技术方案:
本发明第一方面提供了一种低密度海绵胶料,包括按重量份计的如下组分:EPDM生胶100份,氧化锌5-10份,硬脂酸1-2份,碳黑80-100份,填充剂60-80份,软化油60-80份,油膏5-10份,加工助剂1-3份,防老剂1-2份,硫磺0.5-1份,硫化剂DTDM-80 0.8-1.5份,硫化促进剂3.5-5份,发泡剂OBSH-755-8份,发泡剂ADC-75 2-5份,吸湿剂2-5份。
进一步地,所述EPDM生胶为第3单体为ENB型的三元乙丙胶。
进一步地,所述EPDM生胶为阿朗新科K9950C生胶。
进一步地,所述碳黑为碳黑N550。
进一步地,所述填充剂为碳酸钙/硅土。
进一步地,所述吸湿剂为CaO。
进一步地,所述软化油为闪点250℃以上的石蜡油。
第二方面,本发明提供了一种汽车行李箱密封条,该汽车行李箱密封条是由第一方面所述的低密度海绵胶料、海绵胶料与密实胶料一体挤出而得到的。
第三方面,本发明还提供了所述的汽车行李箱密封条的挤出工艺,包括以下步骤:
(1)胶料混炼
将EPDM生胶、氧化锌、硬脂酸、碳黑、填充剂、软化油、油膏、加工助剂、防老剂混炼均匀,得到A炼胶;冷却、停放后,加入发泡剂、硫化剂、硫化促进剂、吸湿剂,再混炼均匀,得到B炼胶;
(2)挤出硫化
将步骤(1)得到的低密度海绵胶料通过一挤出机挤出,挤出机温度控制在30-50℃;将密实胶料由另一挤出机挤出,挤出机温度控制在60-80℃;将海绵胶料由又一挤出机挤出,挤出机温度控制在30-50℃;三种胶料由同一挤出口型挤出,且该口型出口胶料温度控制在70-90℃;然后通过微波热空气加热,微波热空气温度控制在230-250℃;再通过一段热空气,一段热空气温度控制在230-240℃,再通过二段热空气,二段热空气温度控制在230-240℃。
本发明中,所述密实胶料、海绵胶料均可采用本领域常用的密实胶料和海绵胶料。
进一步地,硫化后,对表面进行等离子处理,然后喷涂以形成功能性涂层;再经过固化槽固化涂层,固化槽的温度控制在230-240℃;最后,冷却,裁切,收件,停放。
与现有技术相比,本发明的有益效果在于:
1.本发明的低密度海绵胶料,除一些基本物理机械性能要求外,还具备良好的密封和防水作用。
2.本发明通过将低密度海绵胶料与其他胶料一体挤出来替代传统的离线灌丁基不干胶起到密封防水作用,大大简化了汽车行李箱密封条的制备工艺。
附图说明
图1是现有技术中汽车行李箱密封条未灌胶(a)和灌胶(b)的示意图;
图2是本发明的汽车行李箱密封条的结构示意图。
具体实施方式
下面结合附图和具体实施例对本发明作进一步说明,以使本领域的技术人员可以更好地理解本发明并能予以实施,但所举实施例不作为对本发明的限定。
除非另有定义,本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
下述实施例中所使用的实验方法如无特殊说明,均为常规方法,所用的材料、试剂等,如无特殊说明,均可从商业途径得到。
实施例1
本实施例提供了一种低密度海绵胶料,其配比如下所示:
本实施例的低密度海绵胶料可与密实胶料、海绵胶料一体挤出制备汽车行李箱密封条,具体的挤出工艺为:
(1)胶料混炼
将EPDM生胶、氧化锌、硬脂酸、碳黑、填充剂、软化油、油膏、加工助剂、防老剂混炼均匀,得到A炼胶;冷却、停放后,加入发泡剂、硫化剂、硫化促进剂、吸湿剂,再混炼均匀,得到B炼胶。
(2)挤出硫化
将步骤(1)得到的低密度海绵胶料通过一挤出机挤出,挤出机温度控制在40℃;将密实胶料由另一挤出机挤出,挤出机温度控制在70℃;将海绵胶料由另一挤出机挤出,挤出机温度控制在40℃;三种胶料由同一挤出口型挤出,且该口型出口胶料温度控制在80℃;然后通过微波热空气加热,微波热空气温度控制在240℃;再通过一段热空气,一段热空气温度控制在230℃,再通过二段热空气,二段热空气温度控制在230℃。
(3)后处理
硫化后,对表面进行等离子处理,然后喷涂以形成功能性涂层;再经过固化槽固化涂层,固化槽的温度控制在230℃;最后,冷却,裁切,收件,停放。
实施例2
本实施例提供了一种低密度海绵胶料,其配比如下所示:
组分 | 重量份 |
阿朗新科K9950C生胶 | 100 |
氧化锌 | 10 |
硬脂酸 | 2 |
碳黑N550 | 80 |
碳酸钙 | 70 |
石蜡油 | 70 |
油膏 | 10 |
加工助剂ACROM11 | 2 |
防老剂RD | 1 |
硫磺 | 0.8 |
硫化剂DTDM-80 | 1 |
发泡剂OBSH-75 | 5 |
发泡剂ADC-75 | 3 |
硫化促进剂 | 4 |
CaO-80 | 3 |
本实施例的低密度海绵胶料可与密实胶料、海绵胶料一体挤出制备汽车行李箱密封条,具体的挤出工艺为:
(1)胶料混炼
将EPDM生胶、氧化锌、硬脂酸、碳黑、填充剂、软化油、油膏、加工助剂、防老剂混炼均匀,得到A炼胶;冷却、停放后,加入发泡剂、硫化剂、硫化促进剂、吸湿剂,再混炼均匀,得到B炼胶。
(2)挤出硫化
将步骤(1)得到的低密度海绵胶料通过一挤出机挤出,挤出机温度控制在40℃;将密实胶料由另一挤出机挤出,挤出机温度控制在70℃;将海绵胶料由又一挤出机挤出,挤出机温度控制在40℃;三种胶料由同一挤出口型挤出,且该口型出口胶料温度控制在80℃;然后通过微波热空气加热,微波热空气温度控制在240℃;再通过一段热空气,一段热空气温度控制在230℃,再通过二段热空气,二段热空气温度控制在230℃。
(3)后处理
硫化后,对表面进行等离子处理,然后喷涂以形成功能性涂层;再经过固化槽固化涂层,固化槽的温度控制在230℃;最后,冷却,裁切,收件,停放。
实施例3
本实施例提供了一种低密度海绵胶料,其配比如下所示:
本实施例的低密度海绵胶料可与密实胶料、海绵胶料一体挤出制备汽车行李箱密封条,具体的挤出工艺为:
(1)胶料混炼
将EPDM生胶、氧化锌、硬脂酸、碳黑、填充剂、软化油、油膏、加工助剂、防老剂混炼均匀,得到A炼胶;冷却、停放后,加入发泡剂、硫化剂、硫化促进剂、吸湿剂,再混炼均匀,得到B炼胶。
(2)挤出硫化
将步骤(1)得到的低密度海绵胶料通过一挤出机挤出,挤出机温度控制在40℃;将密实胶料由另一挤出机挤出,挤出机温度控制在70℃;将海绵胶料由又一挤出机挤出,挤出机温度控制在40℃;三种胶料由同一挤出口型挤出,且该口型出口胶料温度控制在80℃;然后通过微波热空气加热,微波热空气温度控制在240℃;再通过一段热空气,一段热空气温度控制在230℃,再通过二段热空气,二段热空气温度控制在230℃。
(3)后处理
硫化后,对表面进行等离子处理,然后喷涂以形成功能性涂层;再经过固化槽固化涂层,固化槽的温度控制在230℃;最后,冷却,裁切,收件,停放。
防水性能测试
将实施例1-3制备的密封条装配在行李箱上,做淋雨试验。结果显示,密封条U型槽内没有水。这表明本发明将低密度海绵胶料与密封条一体挤出,能够替代传统的离线灌丁基不干胶起到密封防水作用。
以上所述实施例仅是为充分说明本发明而所举的较佳的实施例,本发明的保护范围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换,均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。
Claims (10)
1.一种低密度海绵胶料,其特征在于,包括按重量份计的如下组分:EPDM生胶100份,氧化锌5-10份,硬脂酸1-2份,碳黑80-100份,填充剂60-80份,软化油60-80份,油膏5-10份,加工助剂1-3份,防老剂1-2份,硫磺0.5-1份,硫化剂DTDM-80 0.8-1.5份,硫化促进剂3.5-5份,发泡剂OBSH-75 5-8份,发泡剂ADC-75 2-5份,吸湿剂2-5份。
2.根据权利要求1所述的一种低密度海绵胶料,其特征在于,所述EPDM生胶为第3单体为ENB型的三元乙丙胶。
3.根据权利要求2所述的一种低密度海绵胶料,其特征在于,所述EPDM生胶为阿朗新科K9950C生胶。
4.根据权利要求1所述的一种低密度海绵胶料,其特征在于,所述碳黑为碳黑N550。
5.根据权利要求1所述的一种低密度海绵胶料,其特征在于,所述软化油为闪点250℃以上的石蜡油。
6.根据权利要求1所述的一种低密度海绵胶料,其特征在于,所述填充剂为碳酸钙或者硅土。
7.根据权利要求1所述的一种低密度海绵胶料,其特征在于,所述吸湿剂为CaO。
8.一种汽车行李箱密封条,其特征在于,所述汽车行李箱密封条是由权利要求1-7任一项所述的低密度海绵胶料、海绵胶料与密实胶料一体挤出而得到的。
9.根据权利要求8所述的一种汽车行李箱密封条的挤出工艺,其特征在于,包括以下步骤:
(1)胶料混炼
将EPDM生胶、氧化锌、硬脂酸、碳黑、填充剂、软化油、油膏、加工助剂、防老剂混炼均匀,得到A炼胶;冷却、停放后,加入发泡剂、硫化剂、硫化促进剂、吸湿剂,再混炼均匀,得到B炼胶;
(2)挤出硫化
将步骤(1)得到的低密度海绵胶料通过一挤出机挤出,挤出机温度控制在30-50℃;将密实胶料由另一挤出机挤出,挤出机温度控制在60-80℃;将海绵胶料由又一挤出机挤出,挤出机温度控制在30-50℃;三种胶料由同一挤出口型挤出,且该口型出口胶料温度控制在70-90℃;然后通过微波热空气加热,微波热空气温度控制在230-250℃;再通过一段热空气,一段热空气温度控制在230-240℃,再通过二段热空气,二段热空气温度控制在230-240℃。
10.根据权利要求9所述的一种汽车行李箱密封条的挤出工艺,其特征在于,硫化后,对表面进行等离子处理,然后喷涂以形成功能性涂层;再经过固化槽固化涂层,固化槽的温度控制在230-240℃;最后,冷却,裁切,收件,停放。
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