硅烷改性聚氨酯密封胶胶单组份的耐候聚氨酯密封胶

发布时间 : 2023-3-22 10:22:21
Views:

(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

硅烷改性聚氨酯密封胶胶单组份的耐候聚氨酯密封胶

(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

发布时间 : 2023-3-22 10:22:21
Views:

本文试验采用的材料为HP-172B硅烷改性聚氨酯密封胶单组份的耐候聚氨酯密封胶，该硅烷改性聚氨酯密封胶结构中不仅含有硅氧键(Si-O键)，改性后材料的分子链发生了一定的变化，增加了碳氮键(C-N键)和氮氢键(N-H键)的连接。使得改性后材料的分子结构更加稳定，整体的分子链呈现出一种稳定的网状结构。具有耐高温、耐潮湿、耐磨和良好的伸缩性等特点。材料的物理性能参数，如表2.1所示。

首先，采用厚度为2mm，长为300mm，宽为12mm的长方体模具，并在凹槽的底端贴一层厚度大约为0.3的聚四氟乙烯薄膜。聚四氟乙烯本身具有高润滑不粘性的特点，是固体材料中摩擦系数最低和表面张力最小的物质，不茹附任何物质。放置的目的就是为了防止固化后的胶粘在模具底端，破坏试件的完整性。

在填充胶的过程中，为了防止硅烷改性聚氨酯密封胶的过多溢出，将长方体凹槽一端固定并用聚四氟乙烯薄膜阻隔。利用专用的注胶枪将硅烷改性聚氨酯密封胶注入模具中，让模具内充分填满胶。而此时的胶相对不均匀且不能保证底部各个角落都填满胶。这就需要利用平整的表面贴附聚四氟乙烯薄膜的薄片，对凹槽内的胶进一步的填充。从凹槽的一侧开始，沿着上表面匀速划过，以保证凹槽的各个角落充满胶以及上表面的均匀平整。最后，在温度为25℃和湿度为40%的实验室环境条件下放置即可，24h即可完成固化。长方体凹槽模具和固化后的胶如图2.1所示。

固化后，利用手工刀沿着长方体凹槽的两端进行切割，将固化成形的胶条完整取出。再用手动橡胶切片机配合哑铃型裁刀进行裁剪。其中，切片机的底部和哑铃型裁刀可以通过磁铁进行贴合，制备好的胶条需放置在裁刀的正表面下方进行裁剪。手动橡胶切片机和哑铃型裁刀如图2.2和图2.3所示。www.sdyuantai.com

Scan the QR code to read on your phone

上一篇: 丁基防水嵌缝密封胶在交变应力或交变应变作用下的力学响应

下一篇: 聚氨酯密封胶试验设备及工作原理

上一篇: 丁基防水嵌缝密封胶在交变应力或交变应变作用下的力学响应

下一篇: 聚氨酯密封胶试验设备及工作原理