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使用聚氨酯密封膠底涂液時同玻璃的粘結性未考慮光照的影響

  • 發布時間 : 2023-9-13 11:43:51
  • 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.

使用聚氨酯密封膠底涂液時同玻璃的粘結性未考慮光照的影響

(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 : 2023-9-13 11:43:51
  • Views:
Information

1)現象分析

       大量的實驗室模擬試驗表明,部分聚氨酯密封膠產品需要配套專用的底涂,才能實現與實際工程中基材的完美粘結。但是,聚氨酯密封膠的型式檢驗時一般是不使用底涂的,所以未考慮使用底涂時紫外線對聚氨酯密封膠粘結性能(特別是同玻璃的粘結性能)的影響。而密封膠質量復驗時,采用GB 16776-2005《建筑用聚氨酯密封膠》附錄B中的方法進行實際工程用基材同密封膠的粘結性試驗,也未考慮透過玻璃紫外線光照對使用底涂的影響。在實際工程中使用時,紫外線光照卻會實實在在地對底涂的效果產生影響,導致使用底涂增強粘結性的效果降低或失去,甚至導致脫膠等質量事故。

2)解決措施

       同玻璃的粘結性試驗使用底涂時增加透過玻璃紫外線曝露試驗。按GB 16776-2005附錄B中的試驗方法,并增加GB/T 13477.18-2002《建筑密封材料試驗方法第18部分:剝離粘結性的測定》中7.8步驟,即在無水條件下紫外線曝露200 hb。采用此方法,可以評估紫外線光照對使用底涂的粘結體系性能的影響,從而更有效地保證工程質量。www.16878m.com

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