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排查MS密封膠材料本身是否吸潮或吸入空氣
- 發(fā)布時(shí)間 : 2026-3-20 17:49:35
- 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.
排查MS密封膠材料本身是否吸潮或吸入空氣
(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(fā)布時(shí)間 : 2026-3-20 17:49:35
- Views:
當(dāng)MS密封膠本身或者其輸送系統(tǒng)混入水分或者空氣時(shí),再經(jīng)涂膠烘干爐預(yù)烘烤或面漆烘烤,在高溫加熱的作用下,MS密封膠中混入的水分或空氣就會(huì)受熱劇烈膨脹,從而產(chǎn)生小氣泡,甚至可能會(huì)出現(xiàn)氣泡破裂導(dǎo)致膠條開(kāi)裂的情況,因此需要分別進(jìn)行排查。首先,為了排查MS密封膠材料本身是否吸潮或者生產(chǎn)廠家在封裝時(shí)是否混入空氣,針對(duì)此批次PV CMS密封膠,從新開(kāi)封的膠桶內(nèi)挖取一定量的MS密封膠涂布在色板上,并用刮板輕刮多次。發(fā)現(xiàn)MS密封膠表面外觀致密且均勻,輕刮無(wú)明顯氣孔出現(xiàn)。再將輕刮多次的色板放到橇體上,隨生產(chǎn)線經(jīng)過(guò)涂膠烘干爐預(yù)烘干及面漆烘干的烘烤,發(fā)現(xiàn)涂布在色板上的MS密封膠烘烤后呈米白色,顏色表現(xiàn)正常,無(wú)過(guò)烘現(xiàn)象(過(guò)烘即過(guò)度烘烤,一般出現(xiàn)在設(shè)備異常長(zhǎng)時(shí)間烘烤或烘干爐溫度過(guò)高時(shí),MS密封膠顏色一般會(huì)發(fā)黃,嚴(yán)重時(shí)甚至?xí)兂蓽\棕色)。而且并沒(méi)有氣泡或者M(jìn)S密封膠開(kāi)裂問(wèn)題,因此排除MS密封膠材料本身混入水或者空氣的可能。再對(duì)輸送系統(tǒng)進(jìn)行排查,發(fā)現(xiàn)膠桶與輸膠泵之間、輸膠泵與輸送管路之間以及輸送管路與末端膠槍之間的連接,肉眼觀察并無(wú)明顯異常,壓力在工藝要求范圍內(nèi),也無(wú)MS密封膠泄漏情況。因此,采用上述類似排查方法,直接從末端膠槍處擠出一定量的MS密封膠到色板上,隨生產(chǎn)線經(jīng)過(guò)預(yù)烘烤和面漆烘烤工序。發(fā)現(xiàn)擠出到色板上的MS密封膠膠條烘烤后呈米白色,顏色正常,無(wú)過(guò)烘現(xiàn)象,且沒(méi)有氣泡或膠條開(kāi)裂問(wèn)題。
此外,對(duì)該批次車身生產(chǎn)連續(xù)性進(jìn)行了排查。發(fā)現(xiàn)該批次車輛均在涂完MS密封膠當(dāng)天或次日上午便經(jīng)過(guò)了涂膠烘干爐預(yù)烘烤,且與面漆噴涂烘烤時(shí)間均不超過(guò)24 h。MS密封膠涂抹后停留時(shí)間相對(duì)較短,放置導(dǎo)致受潮的可能性不大。并且,如果因?yàn)殚L(zhǎng)時(shí)間停產(chǎn)放置導(dǎo)致受潮,應(yīng)當(dāng)表現(xiàn)為整車上所有的MS密封膠膠條均有可能出現(xiàn)異常,而不是僅出現(xiàn)在固定的車型以及固定的位置。另外,車門靠輪罩弧度位置的包邊MS密封膠膠條開(kāi)裂呈現(xiàn)出長(zhǎng)裂縫(長(zhǎng)達(dá)10、二左右)并非膠氣泡炸裂產(chǎn)生的短裂縫(一般長(zhǎng)度小于1cm,因此經(jīng)過(guò)上述試驗(yàn)驗(yàn)證和理論分析,基本排除MS密封膠材料自身混入空氣或者水分、輸送系統(tǒng)混入空氣或水分以及涂膠后長(zhǎng)時(shí)間放置導(dǎo)致吸潮的可能性。http://www.cs535.com/
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