新能源汽車硅烷改性聚氨酯密封膠涂裝過程

發布時間 : 2025-5-14 10:47:45
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.

新能源汽車硅烷改性聚氨酯密封膠涂裝過程

(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 : 2025-5-14 10:47:45
Views:

在焊縫和飯金搭接區域的內側涂有焊裝車身膠，以增強結構粘接性并提高密封性能。然而，在涂裝車間進行硅烷改性聚氨酯密封膠涂覆作業后，這些區域的間隙處形成了密閉空腔，經過烘烤后，在高溫下，密閉空腔內的空氣受熱膨脹，使硅烷改性聚氨酯密封膠局部隆起;此外，四門兩蓋(即四個車門、前機蓋和后備箱蓋)的折邊在壓合或滾邊后，對于間隙較大的區域，涂覆硅烷改性聚氨酯密封膠后，也會在這些不均勻間隙內形成密閉空腔，進而形成膠泡。

在新能源汽車制造過程中，四門兩蓋的邊緣處通常應用包邊工藝進行處理。為了確保折邊面的平整度，同時增強其防腐與密封性能，一般在包邊前需要涂覆折邊膠。車身折邊膠的涂布方法以及壓合折邊間隙的大小，也是導致硅烷改性聚氨酯密封膠產生膠泡的重要因素，壓合折邊完成后，折邊膠與折邊之間存在一定的間隙，在外側涂布硅烷改性聚氨酯密封膠后，這些間隙處就會形成密閉空腔，經過高溫烘烤后，密閉空腔內的空氣受熱膨脹，導致硅烷改性聚氨酯密封膠層鼓起，形成膠泡。

褶皺、雜質缺陷

在新能源汽車硅烷改性聚氨酯密封膠涂裝過程中，褶皺和雜質是常見的質量缺陷，嚴重影響膠層的外觀質量。雜質來源廣泛，包括空氣中的塵土、未清潔干凈的車身表面或噴涂設備中的殘留物等，雜質進入涂層后，不僅會破壞膠層的光滑度，還會影響膠層的附著力，進而引發膠層脫落、損壞等質量問題。例如，新能源汽車車身四門在涂裝過程中，由于黑膠和紅膠的填充量過多，且在硅烷改性聚氨酯密封膠施工前未能徹底清理干凈，導致在后續的硅烷改性聚氨酯密封膠施工中，PVC膠層中會混入雜物。另外，在新能源汽車涂裝過程中，褶皺現象主要出現在涂料涂覆后，由于涂料表面未能均勻流平，形成明顯的褶皺紋路。http://www.www.sunsage.net/

Scan the QR code to read on your phone

上一篇: 新能源汽車車身后蓋流水槽MS密封膠開裂分析

下一篇: 丁基防水嵌縫膠材料優化

上一篇: 新能源汽車車身后蓋流水槽MS密封膠開裂分析

下一篇: 丁基防水嵌縫膠材料優化