CN112375269A - 一种橡胶发泡密封材料 - Google Patents

一种橡胶发泡密封材料 Download PDF

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CN112375269A
CN112375269A CN202011109279.9A CN202011109279A CN112375269A CN 112375269 A CN112375269 A CN 112375269A CN 202011109279 A CN202011109279 A CN 202011109279A CN 112375269 A CN112375269 A CN 112375269A
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李辉
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Jiangmen Teamful Sealing Technology Co ltd
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Abstract

本发明公开了一种橡胶发泡密封材料，属于密封材料技术领域。以质量份计算包括组分：NBR橡胶100、炭黑20‑60、无机填料5‑40、增塑剂1‑10、硫磺1‑5、氧化锌2‑10、防老剂1‑3、发泡剂1‑15、促进剂1‑5。本发明生产出来的密封橡胶力学性能良好，耐候性强，抗脱落性高，能在长时间能保持密封性能。

Description

一种橡胶发泡密封材料
技术领域
本发明涉及属于密封材料领域，具体涉及一种橡胶发泡密封材料。
背景技术
金属橡胶发泡复合板材是做密封材料不可缺少的材料，密封是防止流体或固体颗粒从相邻结合面间泄露，以及防止外界杂质侵入机器设备内部的零部件或措施，可分为静密封和动密封。其中，静密封是指密封部位没有相对运动，用于固定件的密封。
其中的橡胶部分由于金属橡胶发泡复合板材生产目前大多使用淋涂胶法、辊涂胶法或刮涂法生产；此类生产方法用到的大量溶剂会影响到发泡橡胶的力学性能和寿命，降低金属橡胶发泡复合板材的品质。
发明内容
本发明针对上述现有技术存在的问题，提供一种橡胶发泡密封材料，专门用于金属橡胶发泡复合板材的生产。
为实现本发明目的，通过以下技术方案予以实现：
一种橡胶发泡密封材料，以质量份计算包括以下组分：
Figure BDA0002728054890000011
Figure BDA0002728054890000021
优选地，所述无机填料为轻质碳酸钙。
优选地，所述增塑剂为邻苯二甲酸二丁酯
优选地，所述防老剂为对苯二胺类防老剂
优选地，所述发泡剂为偶氮化合物。
优选地，所述促进剂为秋兰姆类促进剂。
上述橡胶发泡密封材料的制备方法，包括以下步骤：
(1)混炼：橡胶进行混炼；
(2)压片：将混炼后的橡胶压片；
(3)硫化：将压片后的橡胶进行硫化；
(4)防粘表面处理：硫化后的橡胶表面附上一层表面防粘层；表面防粘层的材料为聚四氟乙烯、蜡、硅油、淀粉、石墨中的至少一种。
优选地，所述步骤(1)中，混炼的压力范围为0.4-0.7mpa，混炼时间为10-20分钟；混合温度为100-150℃；转速为24-30r/min。
优选地，所述步骤(2)中，橡胶的压片温度为40-60℃，压力为0.2-0.3Mpa，厚度为0.6-1.2mm。
优选地，所述步骤(4)中，硫化温度为140-180℃，硫化时间为2-10min。
本发明生产出来的密封橡胶力学性能良好，耐候性强，抗脱落性高，能在长时间能保持密封性能。
具体实施方式
下面具体实施例对本发明作进一步说明，以使本领域技术人员可以更好的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。按照本领域的普通技术知识和惯用手段，在不脱离本发明上述基本技术思想前提下，对本发明上述结构做出的其它多种形式的修改、替换或变更，均应落在本发明的保护范围。
实施例一
本发明的橡胶材料按质量份计算包括以下成分：
Figure BDA0002728054890000031
Figure BDA0002728054890000041
本发明所用的金属基材厚度在0.4mm，为SPCC冷轧钢板，其他规格如表1所示。
表1金属基材标准
Figure BDA0002728054890000042
本发明制作方法包括以下步骤：
(1)金属基材表面处理：将金属基材先经过加热烘道进行加热，其加热温度为180℃，加热时间为1min；加热后利用等离子机对金属基材表面进行清洁处理。
(2)橡胶混炼：根据上方的配比将橡胶的各组分进行混炼，其中前转子转速为30r/min，后转子转速为24.5r/min；上顶栓压力为0.7mpa，混炼时间为10分钟；混合温度为100℃。
(3)压片粘合：混炼后的橡胶通过挤出机连续供料给四辊橡胶压延机压片，压片温度为60℃，压力为0.2Mpa，厚度为0.6mm；宽度为899mm；压片后的橡胶利用酚醛树脂类粘合剂PS1066与金属基材粘合，粘合剂厚度为0.025mm。保持粘合后金属基材和橡胶的表面光滑平整。
(4)硫化：硫化温度为180℃，硫化时间为10min；硫化时采用硫化烘道进行常压硫化。
(5)防粘表面处理：经过硫化后的金属橡胶复合板材通过辊涂或者喷涂的方式在其表面附上一层表面防粘层；表面防粘层的厚度为0.05mm；表面防粘层的材料为聚四氟乙烯。
(6)成品：防粘表面处理后即为成品，成品进行性能测试，结果如表2所示。
实施例二
本发明的橡胶材料按质量份计算包括以下成分：
Figure BDA0002728054890000051
本发明所用的金属基材厚度为0.14mm，为SPCC冷轧钢板，其他规格如表1所示。
本发明制作方法包括以下步骤：
(1)金属基材表面处理：将金属基材先经过加热烘道进行加热，其加热温度为160℃，加热时间为10min；加热后利用等离子机对金属基材表面进行清洁处理。
(2)橡胶混炼：根据上方的配比将橡胶的各组分进行混炼，其中前转子转速为30r/min，后转子转速为24.5r/min；上顶栓压力为0.4mpa，混炼时间为20分钟；混合温度为150℃。
(3)压片粘合：混炼后的橡胶通过挤出机连续供料给四辊橡胶压延机压片，压片温度为40℃，压力为0.3Mpa，厚度为1.2mm；宽度为899mm；压片后的橡胶利用酚醛树脂类粘合剂PS1066与金属基材粘合，粘合剂厚度为0.035mm。保持粘合后金属基材和橡胶的表面光滑平整。
(4)硫化：硫化温度为140℃，硫化时间为2min；硫化时采用硫化烘道进行常压硫化。
(5)防粘表面处理：经过硫化后的金属橡胶复合板材通过辊涂或者喷涂的方式在其表面附上一层表面防粘层；表面防粘层的厚度为0.02mm；表面防粘层的材料为硅油。
(6)成品：防粘表面处理后即为成品，成品进行性能测试，结果如表2所示。
实施例三
本发明的橡胶材料按质量份计算包括以下成分：
Figure BDA0002728054890000061
Figure BDA0002728054890000071
本发明所用的金属基材厚度为0.4mm，为SPCC冷轧钢板，其他规格如表1所示。
本发明制作方法包括以下步骤：
(1)金属基材表面处理：将金属基材先经过加热烘道进行加热，其加热温度为160-180℃，加热时间为1-10min；加热后利用等离子机对金属基材表面进行清洁处理。
(2)橡胶混炼：根据上方的配比将橡胶的各组分进行混炼，其中前转子转速为30r/min，后转子转速为24.5r/min；上顶栓压力为0.7mpa，混炼时间为20分钟；混合温度为110℃。
(3)压片粘合：混炼后的橡胶通过挤出机连续供料给四辊橡胶压延机压片，压片温度为60℃，压力为0.3Mpa，厚度为0.6mm；宽度为899mm；压片后的橡胶利用酚醛树脂类粘合剂PS1066与金属基材粘合，粘合剂厚度为0.03mm。保持粘合后金属基材和橡胶的表面光滑平整。
(4)硫化：硫化温度为180℃，硫化时间为4min；硫化时采用硫化烘道进行常压硫化。
(5)防粘表面处理：经过硫化后的金属橡胶复合板材通过辊涂或者喷涂的方式在其表面附上一层表面防粘层；表面防粘层的厚度为0.02mm；表面防粘层的材料为蜡。
(6)成品：防粘表面处理后即为成品，成品进行性能测试，结果如表2所示。
表2橡胶复合板材实验性能测试报告
Figure BDA0002728054890000081
Figure BDA0002728054890000091
由表2可知，本发明最终的成品的力学性能良好，耐候性强，抗脱落性高，能在长时间能保持密封性能；同时生产过程中不使用有机溶剂，杜绝了VOCs的生成。

Claims (10)

1.一种橡胶发泡密封材料，其特征在于，以质量份计算包括以下组分：
Figure FDA0002728054880000011
2.根据权利要求1所述的橡胶发泡密封材料，其特征在于：所述无机填料为轻质碳酸钙。
3.根据权利要求1所述的橡胶发泡密封材料，其特征在于：所述增塑剂为邻苯二甲酸二丁酯
4.根据权利要求1所述的橡胶发泡密封材料，其特征在于：所述防老剂为对苯二胺类防老剂
5.根据权利要求1所述的橡胶发泡密封材料，其特征在于：所述发泡剂为偶氮化合物。
6.根据权利要求1所述的橡胶发泡密封材料，其特征在于：所述促进剂为秋兰姆类促进剂。
7.权利要求1-6任一所述的橡胶发泡密封材料的制备方法，其特征在于包括以下步骤：
(1)混炼：橡胶进行混炼；
(2)压片：将混炼后的橡胶压片；
(3)硫化：将压片后的橡胶进行硫化；
(4)防粘表面处理：硫化后的橡胶表面附上一层表面防粘层；表面防粘层的材料为聚四氟乙烯、蜡、硅油、淀粉、石墨中的至少一种。
8.根据权利要求7所述的橡胶发泡密封材料，其特征在于：所述步骤(1)中，混炼的压力范围为0.4-0.7mpa，混炼时间为10-20分钟；混合温度为100-150℃；转速为24-30r/min。
9.根据权利要求7所述的橡胶发泡密封材料，其特征在于：所述步骤(2)中，橡胶的压片温度为40-60℃，压力为0.2-0.3Mpa，厚度为0.6-1.2mm。
10.根据权利要求7所述的橡胶发泡密封材料，其特征在于：所述步骤(4)中，硫化温度为140-180℃，硫化时间为2-10min。
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