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聚氨酯密封胶的使用及注意事

  • 发布时间 : 2022-6-17 10:33:56
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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.

聚氨酯密封胶的使用及注意事

(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 : 2022-6-17 10:33:56
  • Views:
Information

    智能张拉系统使用力传感器直接测量张拉力,量测数据更直接,消除了穿心千斤顶内在的摩阻、油管虚压等外界因素的影响,实时校核力传感器和油压传感器的测量值,解决由表2可以看出,水性聚氨酯密封胶的固化初期剥离强度不如溶荆型聚氨酯密封胶相应的剥离强度;4h后其剥离时的剥离强度增加较快。这与水性聚氨酯密封胶分散介质的择发祖度有关。水性聚氨酯密封胶在密闭容器中静48 h后,应无分层现象,再按剥离强度侧试方法测试,其剥离强度必须基本保持不变;按照国标侧试其耐老化性,耐热性、耐水解性及耐黄变性等,都应符合要求。水性聚氨酯密封胶的使用及注意事项鞋用水性聚氨酯密封胶的使用工艺流程主要有:调胶一上胶一干燥一粘合.加压一井理。操作及相关的注意事项如下:

4.1调胶

    (1)水性聚氨酯密封胶的密度为1. 1g cm,左右,当储存较长时间后,有可能出现沉淀分层,故使用前须摇匀。根据可使用时间约2h来确定润胶,以避免浪费。

    (2)清洁调胶容器及搅拌器,正确称盆水性聚氨酯密封胶及固化剂并t于容器中,2者质盆比为100: 5一6。

    (3)因密度不同,固化剂加人后会浮在表面,所以搅拌初期应将搅拌叶片t于容器底部,再以低速搅拌,以免外滋,影响计。然后在保证不外滋的前提下,高速搅拌10 min以上。密闭备用,以兔吸瀚或受污染,调胶必须确实均匀,有利得到最佳粘按效果。

4.2上胶

    (1)被粘材料须先行预热,待其表面达扔一50℃后再上胶,这样可增加粘接面物理特性提高干操速度。亦可在上胶前先用处理剂处理材质表面,有利于改善水性聚氨酯密封胶与材质间的润湿性,提高初期粘接效果。

    (2)上胶时在鞋面部位纺织品处须加大处理剂及水性胶的用t,否则,上胶时胶液很容易被纺织品吸干,甚至导致欠胶现象发生。

    (3)依鞋型选用合适的涂刷工具,如抽漆刷、水彩笔等。上胶时应涂布均匀,不可积胶或太薄,避免干燥不良及欠胶。另外,滋胶造成鞋面污染,应立即用干净布擦拭干净。

    (4)补胶一般用溶剂型聚氨酯密封胶,自然干燥10 min后粘合,不可用水性聚氨酯密封胶,因为局部补胶不易干燥,影响整体粘接效果。

    (5)上胶工具使用一段时间后会变硬,外翻,造成使用不方便,此时可用MEK浸泡清洗。

4. 3干操

    (1)水性聚氨酯密封胶的干操最好是在低沮而长时间干燥,然后在粘合前以活化灯使沮度达到所需的最佳粘合温度。

    (2)干燥温度由低到高循序渐进,不可一开始就直接高温干燥,更不可因干燥不足而冷却后再干燥,否则会造成胶层表面结皮影响内部水分燕发,最好在输送带上加装保沮早及电热管保温。

    (3)水性聚氨酯密封胶涂布后干燥与否,到断方法是看其表面出烘箱时是否完全呈透明状。


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