具備良好密封性和結構性的丁基防水嵌縫膠
2025-09-28
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車窗硅烷改性聚氨酯密封膠層進行老化分析
- 發布時間 : 2025-9-28 22:35:58
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(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.
車窗硅烷改性聚氨酯密封膠層進行老化分析
(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.
- 發布時間 : 2025-9-28 22:35:58
- Views:
Information
通過對運行程達到四級修程的車窗硅烷改性聚氨酯密封膠層進行老化分析，確定硅烷改性聚氨酯密封膠膠層老化降解要發生在外表層1m以內的深度范內，內部老化降解跡象不明顯因此，在返修時，只需要去除最外層約3 nnn深度范圍的硅烷改性聚氨酯密封膠進行修復，即可達到力學性能要求，具體方法如下:
(1)硅烷改性聚氨酯密封膠的拆除
采用鏟刀或者美工刀沿出現異常情況的硅烷改性聚氨酯密封膠部位的兩邊基材邊緣呈V字型向中間切割，直至露出內部新鮮硅烷改性聚氨酯密封膠膠層，并修整平滑。
(2)表面處理
用無紡布蘸取活化劑沿一個方向清潔新鮮的硅烷改性聚氨酯密封膠表面，晾置10 min2 h不等。
(3)硅烷改性聚氨酯密封膠施工
根據接縫寬度切割膠嘴，切割角度約朽;采用膠帶沿槽縫周lvI進行防護;掃一膠時，盡星將膠嘴伸到縫隙底部，直接接觸基材，并保持合適的打膠速度，打連續足夠的硅烷改性聚氨酯密封膠條，避免膠條有空腔;采月料或橡膠刮片將硅烷改性聚氨酯密封膠仄實刮平;采用平汾劑修整膠而，保持最仕外觀;精修后，膠帶和基材保持約45。撕去膠帶方案驗證按照L述修復方案進行處理后，井在其上打一條長約150 rnm，寬約10 rnrn ,厚約5 rnm的車窗密膠在標了;狀態下固化7d，按照fWs1618標準進行檢測，檢測結果為>95%的硅烷改性聚氨酯密封膠內聚破壞(界面粘接強度>膠內聚強度)，方案可行。
采用掃描電鏡、紅外光潛儀和電子力一能試驗機對待修復硅烷改性聚氨酯密封膠膠層進行老化性能檢測的技術方法切實可行，老化原囚分析合理制定的返修方案在確保粘接質量的前提下，提高了車輛件后維修效率，(方法可推廣至其他類似結構的檢測維修技術中。http://www.teyuegou.cn/
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