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車燈用硅烷改性聚氨酯密封膠廠家
- 發布時間 : 2023-11-15 11:52:48
- 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.
車燈用硅烷改性聚氨酯密封膠廠家
(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 : 2023-11-15 11:52:48
- Views:
Information
車燈用硅烷改性聚氨酯密封膠廠家主要在車燈鏡片與支架間起粘接作用。鏡片的材料為PC或玻璃，作為支架的燈殼所用材料為塑料(如PP,ABS,PC,PM-MA等)，少數采用金屬材料。車燈工作時燈內溫度約為70一160 ℃，長期暴露在空氣中且經常處于顛簸狀態，因此車燈用硅烷改性聚氨酯密封膠廠家除滿足汽車用硅烷改性聚氨酯密封膠廠家的基本性能要求外，還需要滿足一些特殊性能要求:一是耐候性能優異，以防止因太陽光中紫外線長期照射而引起龜裂及受空氣中雨水侵蝕老化;二是不能有明顯的起霧現象，以避免影響透光率;三是深層硫化要快，以提高生產周轉率;四是粘接與密封性能要好，以防止發生車燈脫落和漏水;五是耐蠕變、耐疲勞性能要突出;六是耐腐蝕、耐老化性能要好;匕是能耐高低溫及驟冷驟熱的溫度沖擊。
目前，車燈用粘接密封材料大多為丁基熱熔膠和反應性聚氨醋膠。丁基熱熔膠固化快，適合于大批量工業化生產。但其長期處于車燈照射和高溫環境下，易開裂、漏水，降低了汽車行駛安全性，市場份額已逐漸減小。反應性聚氨醋膠相比丁基熱熔膠，耐熱、耐水性更佳，且具有較好的初粘強度。然而，因結構的特殊性，其耐紫外線輻射性能較差，且具有一定毒性，長期暴露在惡劣環境中易龜裂。有機硅硅烷改性聚氨酯密封膠廠家屬于“冷膠”，只需在室溫下接觸空氣即可硫化，使用方便，是車燈密封應用的主要發展方向之一。
應用于車燈粘接的室溫硫化有機硅硅烷改性聚氨酯密封膠廠家包括單組分和雙組分2類。其中的單組份硅烷改性聚氨酯密封膠廠家依靠空氣中的水分交聯硫化，深層硫化速度較慢;雙組份聚氨酯密封膠廠家硫化速度較快，但使用時需要將兩組分混合，工序較復雜。目前國內常用的車燈用有機硅硅烷改性聚氨酯密封膠廠家主要為雙組分縮合型室溫硫化硅橡膠和單組分脫醇型室溫硫化硅橡膠大部分研究是圍繞著如何提升這兩種硅橡膠的性能展開的。www.hryfc.com
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