{"id":5960,"date":"2023-03-01T14:29:32","date_gmt":"2023-03-01T14:29:32","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5960"},"modified":"2023-03-01T14:29:32","modified_gmt":"2023-03-01T14:29:32","slug":"solve-the-bubbles-produced-by-the-paint","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/solve-the-bubbles-produced-by-the-paint\/","title":{"rendered":"Comment r\u00e9soudre les bulles produites par la peinture ?"},"content":{"rendered":"<h1><strong>Comment r\u00e9soudre les bulles produites par la peinture ?<\/strong><\/h1>\n<p>Avec le d\u00e9veloppement rapide de l'industrie du rev\u00eatement, la vari\u00e9t\u00e9 des rev\u00eatements, l'am\u00e9lioration des qualit\u00e9s, les gens ont des exigences plus \u00e9lev\u00e9es en mati\u00e8re de protection et de d\u00e9coration du rev\u00eatement, c'est pourquoi l'\u00e9tat de surface du rev\u00eatement est une pr\u00e9occupation majeure. L'existence de bulles d'air affecte s\u00e9rieusement l'apparence du film de rev\u00eatement, provoquant souvent un r\u00e9tr\u00e9cissement, des trous d'\u00e9pingle, des imperfections, des yeux de poisson et d'autres maux. Par cons\u00e9quent, le probl\u00e8me des bulles d'air n'a pas seulement affect\u00e9 l'effet protecteur du film de rev\u00eatement, mais a \u00e9galement fortement affect\u00e9 l'effet d\u00e9coratif du film de rev\u00eatement.<\/p>\n<p>&nbsp;<\/p>\n<p>Caract\u00e9ristiques et classification des bulles d'air<\/p>\n<p>Dans le processus de production des rev\u00eatements, les bulles apparaissent comme des facteurs perturbateurs, de sorte que les produits de rev\u00eatement dans l'application des d\u00e9fauts de surface, \u00e0 la fois pr\u00e9judiciables \u00e0 l'apparence, mais aussi affectant la r\u00e9sistance \u00e0 la corrosion et la r\u00e9sistance aux intemp\u00e9ries du film de rev\u00eatement.<\/p>\n<p>Les bulles ont une taille et peuvent contenir du liquide, de la vapeur, d'autres gaz ou de la mati\u00e8re cristalline. La taille de la bulle d\u00e9pend de l'adh\u00e9rence du rev\u00eatement \u00e0 la surface du substrat, de la pression du liquide ou du gaz \u00e0 l'int\u00e9rieur de la bulle et de la mesure dans laquelle le film de rev\u00eatement est \u00e9tir\u00e9 et invers\u00e9 afin de maintenir un \u00e9quilibre avec l'adh\u00e9rence du substrat du rev\u00eatement. Selon sa forme, la bulle peut \u00eatre divis\u00e9e en deux types : la bulle et la mousse. La bulle est un minuscule air sph\u00e9rique unique dispers\u00e9 dans un milieu tr\u00e8s visqueux. La plupart des bulles produites par les rev\u00eatements \u00e0 base de solvant sont de ce type. La mousse, quant \u00e0 elle, appara\u00eet dans les milieux qui ont tendance \u00e0 mousser. Lorsque ce type de milieu est dispers\u00e9, en raison de la grande densit\u00e9 de remplissage de l'air, un grand nombre de bulles sont souvent produites, car la diff\u00e9rence de densit\u00e9 entre l'air et le liquide est tr\u00e8s importante, les bulles montent rapidement \u00e0 la surface du liquide, formant une petite quantit\u00e9 de liquide pour former un collectif dense de bulles s\u00e9par\u00e9es par un film de liquide. Le bullage des peintures \u00e0 base d'eau est principalement de ce type.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Quelles sont les causes de la formation de bulles ?<\/p>\n<p>Le cloquage se produit g\u00e9n\u00e9ralement avec le processus de vieillissement du rev\u00eatement. En ce sens, le cloquage peut \u00eatre divis\u00e9 en deux types : le cloquage d'expansion et le cloquage de corrosion. Plusieurs raisons expliquent le cloquage du film de rev\u00eatement.<\/p>\n<p>&nbsp;<\/p>\n<p>PARTIE1. Traitement de surface incorrect du substrat<\/p>\n<p>&nbsp;<\/p>\n<p>Les oxydes de la surface du substrat, les sels solubles et d'autres substances sont le point de d\u00e9clenchement du cloquage du rev\u00eatement. Lorsque la surface du substrat est tach\u00e9e de cire, d'huile, de poussi\u00e8re, de sels solubles et d'autres substances, ou lorsque la surface du substrat pr\u00e9sente de l'humidit\u00e9, des gouttelettes d'eau, des liquides volatils, ou lors du traitement de la surface, la pi\u00e8ce est concave, rouill\u00e9e, humide, etc., ce qui entra\u00eene le s\u00e9chage du film de rev\u00eatement, le rev\u00eatement \u00e0 ces endroits et l'adh\u00e9rence de la surface du substrat ne sont pas fermes, l'humidit\u00e9 s'accumule dans la zone de faible adh\u00e9rence, de sorte que la phase liquide ou gazeuse s'accumule dans ces zones. Lorsque la temp\u00e9rature change, la pression de vapeur g\u00e9n\u00e9r\u00e9e par l'expansion thermique est la principale raison de la formation de bulles. Dans un environnement chaud et humide, la double action de la pression de vapeur et de la pression osmotique intensifie la formation de bulles. La rouille, l'oxydation et d'autres substances pr\u00e9sentes dans le rev\u00eatement ou dans les canaux microscopiques du film de rev\u00eatement \u00e0 l'int\u00e9rieur de l'eau, le gaz, la r\u00e9action du milieu de corrosion, la g\u00e9n\u00e9ration de gaz, associ\u00e9s \u00e0 l'influence de la temp\u00e9rature ambiante et de l'humidit\u00e9, provoqueront \u00e9galement la formation de cloques sur le rev\u00eatement.<\/p>\n<p>&nbsp;<\/p>\n<p>PARTIE 2. Le gaz contenu dans le rev\u00eatement est lib\u00e9r\u00e9 avec l'augmentation de la temp\u00e9rature<\/p>\n<p>&nbsp;<\/p>\n<p>Dans le film humide form\u00e9 par le rev\u00eatement, il reste environ 10% de solvants volatils, d'autres solvants, environ 90%, ont \u00e9t\u00e9 volatilis\u00e9s dans l'atmosph\u00e8re pendant le processus de peinture, et d'autres volatilisations inappropri\u00e9es de solvants dans le rev\u00eatement causeront \u00e9galement des r\u00e9sidus et formeront des bulles. La capacit\u00e9 de r\u00e9tention des solvants est li\u00e9e au taux d'\u00e9vaporation des solvants et aux conditions externes, mais aussi \u00e0 leur interaction avec le solvant et \u00e0 l'adsorption des charges, etc. Le solvant r\u00e9siduel dans le rev\u00eatement est comme un plastifiant, qui ramollit le film de rev\u00eatement. Les solvants \u00e9tant sensibles \u00e0 l'eau, les solvants r\u00e9siduels peuvent augmenter l'absorption d'eau dans le film de rev\u00eatement et le transfert d'humidit\u00e9 dans le rev\u00eatement. Si l'adh\u00e9rence du rev\u00eatement lui-m\u00eame n'est pas ferme, la diminution de sa r\u00e9sistance \u00e0 l'eau entra\u00eenera une perte d'adh\u00e9rence, ce qui provoquera la formation de cloques sur le rev\u00eatement.<\/p>\n<p>&nbsp;<\/p>\n<p>PARTIE 3. R\u00e9sidus de gaz dans un substrat poreux<\/p>\n<p>&nbsp;<\/p>\n<p>Les solvants peuvent \u00e9galement provoquer le cloquage du film de rev\u00eatement sur les substrats poreux (tels que le ciment, le bois). En g\u00e9n\u00e9ral, les rev\u00eatements organiques sont appliqu\u00e9s sur des substrats inorganiques, et le cloquage se produit facilement lorsque la temp\u00e9rature de la surface est \u00e9lev\u00e9e. \u00c0 ce moment-l\u00e0, la vitesse de g\u00e9n\u00e9ration des bulles est tr\u00e8s rapide, ce qui facilite la rupture et la r\u00e9v\u00e9lation du substrat. Ce type de bulle peut \u00eatre \u00e9limin\u00e9 en appliquant un appr\u00eat p\u00e9n\u00e9trant. L'appr\u00eat p\u00e9n\u00e9trant est g\u00e9n\u00e9ralement \u00e0 faible viscosit\u00e9, \u00e0 film mince, peut s\u00e9cher rapidement et a suffisamment de temps pour p\u00e9n\u00e9trer. \u00c9viter les temp\u00e9ratures \u00e9lev\u00e9es pendant la p\u00e9riode de construction permet \u00e9galement d'\u00e9viter ce type de bulles.<\/p>\n<p>&nbsp;<\/p>\n<p>PARTIE 4. Absorption de gaz ou de liquide \u00e0 la surface d'un pigment ou d'une charge<\/p>\n<p>&nbsp;<\/p>\n<p>Les charges solubles dans la peinture sont la cause de nombreux probl\u00e8mes de bulles. Le pigment soluble absorbe l'humidit\u00e9 \u00e0 travers le rev\u00eatement et devient une solution. En raison de l'osmose, l'eau est entra\u00een\u00e9e \u00e0 travers le rev\u00eatement jusqu'\u00e0 la solution concentr\u00e9e. Le m\u00eame ph\u00e9nom\u00e8ne se produit si le pigment soluble tache le substrat ou toute surface entre les rev\u00eatements. Par cons\u00e9quent, le cloquage est in\u00e9vitable tant que le rev\u00eatement contient des substances solubles.<\/p>\n<p>Une fois que vous avez compris les causes du gonflement et de la formation de trous d'\u00e9pingle, vous devez trouver la bonne solution.<\/p>\n<p>(Tambour de peinture)<\/p>\n<p>&nbsp;<\/p>\n<p>Le renforcement de la gestion de la construction et l'application d'une m\u00e9thode de brossage correcte sont deux aspects \u00e0 r\u00e9soudre.<\/p>\n<p>1, construction pour \u00e9viter les temp\u00e9ratures \u00e9lev\u00e9es, l'humidit\u00e9 et d'autres intemp\u00e9ries, l'humidit\u00e9 de surface du substrat \u00e0 maintenir \u00e0 3 \u2103 ou plus, l'humidit\u00e9 relative n'est pas sup\u00e9rieure \u00e0 85%.<\/p>\n<p>2\u3001Traiter soigneusement le substrat, maintenir la surface propre, sans r\u00e9sidus d'\u00e9lectrolyte, de poussi\u00e8re, d'huile et d'autres impuret\u00e9s qui affectent l'adh\u00e9rence de la peinture.<\/p>\n<p>3, (accentuation) lors du brossage de la peinture, utiliser une couche mince avec plusieurs passages, augmenter le temps de brossage, afin que le solvant entre les couches soit compl\u00e8tement \u00e9vapor\u00e9 et r\u00e9duire la quantit\u00e9 de r\u00e9sidus.<\/p>\n<p>4\u3001M\u00e9thode de brossage crois\u00e9 pour assurer une \u00e9paisseur uniforme du film de peinture.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Comment r\u00e9soudre les bulles produites par la peinture ? Avec le d\u00e9veloppement rapide de l'industrie du rev\u00eatement, la vari\u00e9t\u00e9 des rev\u00eatements, l'am\u00e9lioration des qualit\u00e9s, les gens ont des exigences plus \u00e9lev\u00e9es en mati\u00e8re de protection et de d\u00e9coration du rev\u00eatement, c'est pourquoi l'\u00e9tat de surface du rev\u00eatement est une pr\u00e9occupation majeure. L'existence de bulles d'air affecte s\u00e9rieusement la [...]<\/p>","protected":false},"author":1,"featured_media":5932,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":["post-5960","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uv-light-curing-series"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to solve the bubbles produced by the paint? - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/fr\/solve-the-bubbles-produced-by-the-paint\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to solve the bubbles produced by the paint? - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"How to solve the bubbles produced by the paint? 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With the rapid development of the coating industry, the variety of coatings, grade upgrade, people put forward higher requirements for the protection and decoration of the coating, therefore, the surface state of the coating is of great concern. 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