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采用預先成型的聚氨酯密封膠帶進行焊縫密封

  • 發布時間 : 2023-8-11 9:21:40
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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.

采用預先成型的聚氨酯密封膠帶進行焊縫密封

(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 : 2023-8-11 9:21:40
  • Views:
Information

       聚氨酯密封膠帶在車身特定部位焊裝成型工藝中,較之PVC塑溶膠而言,采用預先成型的聚氨酯密封膠帶進行焊縫密封,在保證焊縫外表美觀方面優勢非常明顯:在大面積車身裝配過程中,傳統工藝仍以焊接、鉚接等為主要方式。在國外已采用高強度壓敏膠帶,這種工藝不僅可以滿足結構性粘接的質量要求,且能保證車身外表平整美觀,達到傳統工藝無法實現的減震、降噪、密封、防銹的作用。但國內高,受熱分解時無腐蝕性氣體放出,綜合性能好,是目前國內外汽車廠家應用最多,也是人們對其進行性能改進研究最多的一類聚氨酯密封膠,環氧樹脂類折邊膠國產化品種較多,這些品種基本上都是按照相關汽車廠家引進車型的技術要求進行開發研制的,為了制得適用于南汽依維柯車型要求的半結構型折邊膠,晨光化工研究院采用聚氨醋改性環氧樹脂的技術路線,將制取的互穿網絡聚合物EPU作為膠料的基材,按不同配比制得不同粘接強度和伸長率的汽車用聚氨酯密封膠,同時還研制了既能對預聚體的NCO基起作用,又能降低雙氰胺固化劑分解溫度,配膠后作雙氰胺促進劑,在常溫下可長期貯存,而在150-180℃又能迅速固化的固化促進劑ICN,研制的CA-3,CA-4聚氨酯密封膠的性能達到意大利油漆公司的同類產品水平,東風汽車公司在EQ103輕型車車門折邊膠的開發應用中,采用端梭基丁睛橡膠改性環氧樹脂的方法,合成具有較高活性的嵌段共聚物預聚體并以此為基材成分,調整其他配合劑,研制出具有良好觸變性,油面附著性,低溫流動性和高強度(剪切強度>20MPa)及較高韌性(yL形剝離強度>SON om-1)的折邊膠,其綜合性能與美國PPG公司的同類產品CorabondHC7707折邊膠相當。www.16878m.com

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