面漆與硅烷改性聚氨酯密封膠“濕碰濕”涂裝新型工藝

發(fā)布時(shí)間 : 2025-2-7 20:35:25
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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.

面漆與硅烷改性聚氨酯密封膠“濕碰濕”涂裝新型工藝

(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 : 2025-2-7 20:35:25
Views:

由于硅烷改性聚氨酯密封膠的各組分之間沒有化學(xué)鍵只有吸收和滲透等分子間的相互作用，因此強(qiáng)烈的撞擊、不適宜的溫度均可能使其吸潮、粘結(jié)等從而影響產(chǎn)品質(zhì)量。因此目前汽車車身采用二涂層涂裝的工藝流程時(shí)硅烷改性聚氨酯密封膠通常在電泳底漆烘干之后進(jìn)行涂布，通過戶VC烘干室140 ℃烘干使涂膠表面固化后再進(jìn)行底漆打磨、擦凈和面漆涂裝。為節(jié)省涂裝線的能耗在采用140 ℃烘烤固化的面漆的情況下也可以將涂膠后的車身在戶VC烘干室進(jìn)行預(yù)烘干(140℃、保溫10 min)使之表面固化而不影響隨后的打磨、擦凈、噴面漆等工序的進(jìn)行然后通過面漆烘干室140 ℃、保溫20 min的烘烤在面漆干燥的同時(shí)使硅烷改性聚氨酯密封膠完全固化。

大多數(shù)工件在面漆涂裝前需對(duì)電泳涂層進(jìn)行打磨、擦凈，一般現(xiàn)行的涂裝工藝將此工序布置在戶VC烘干之后毗鄰面漆噴涂。然而由于面漆與硅烷改性聚氨酯密封膠“濕碰濕”涂裝的新型工藝是在未凝膠上直接噴漆因此必須避免對(duì)未凝膠表面的污染及碰傷以保證面漆涂裝后工件的表面質(zhì)量所以必須更改現(xiàn)行的涂裝工藝流程使電泳底漆的打磨和擦凈在涂膠之前進(jìn)行使涂膠工序與噴面漆工序相毗鄰并與噴涂及晾干后的面漆共同經(jīng)過面漆烘干室一并烘干。http://www.www.mobmib.com/

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