常温值(25 ℃)表征丁基防水嵌缝胶在工作时的状态

发布时间 : 2024-11-20 17:17:12
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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.

常温值(25 ℃)表征丁基防水嵌缝胶在工作时的状态

(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.

发布时间 : 2024-11-20 17:17:12
Views:

此项指标表征产品在室温的软硬程度和高温下的热熔性能及流变性能，用于检验产品在实际应用中的施涂工艺性。常温值(25 ℃)表征丁基防水嵌缝胶在工作时的状态，不能太大也不能太小过大一方面影响对玻璃和间隔条豁合，另一方面使中空玻璃制作过程中的合片不易压合，同时，当环境温度较低时，丁基防水嵌缝胶过硬，应力易集中造成丁基防水嵌缝胶开裂;过小则易流淌，夏天温度高时，丁基防水嵌缝胶受热处于熔融状态下，玻璃错位滑移会造成密封失败，严重者流人中空玻璃间隔层内，从而影响中空玻璃的质量。高温值(130 ℃)则表征丁基防水嵌缝胶在施工时的状态，同样不能太大也不能太小过大易流淌影响挤出成条;过小一方面要提高挤出温度〔或提高挤出压力)同时影响对铝条的赫合。然而，丁基防水嵌缝胶的涂布温度不能无限大的提高，一般丁基防水嵌缝胶说明书中要求涂布温度不能超过160℃，否则胶会焦烧变质;另一方面，有可能在高速(如)30 m/min)丁基防水嵌缝胶涂布机上无法使用一一涂不出胶(表现为铝条上不粘有胶)或涂出胶不均匀，铝条上的胶一段一段的。以笔者之见，JC/T914-2003《中空玻璃用丁基热熔丁基防水嵌缝胶》标准中对130℃时针人度值的上限值的限定为330也不妥:目前市场上较为先进的丁基防水嵌缝胶涂布机的涂布速度很快(可提高工作效率)，约在30-35m/min之间，如果丁基防水嵌缝胶130℃时针人度值卡在230-330之间，因出胶量太低，则没法在这种先进的设备上使用、而市场上在该种机型上使用的丁基防水嵌缝胶经检测其针人度值都大于350, 130℃时针人度值不满足JC/T914-2003《中空玻璃用丁基热熔丁基防水嵌缝胶》标准的要求，其它指标符合要求，但它却是适用的，符合施涂工艺。http://www.sdyuantai.com/

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