{"id":9397,"date":"2024-07-22T14:03:19","date_gmt":"2024-07-22T14:03:19","guid":{"rendered":"https:\/\/customizepacking.com\/?p=9397"},"modified":"2024-11-24T13:21:55","modified_gmt":"2024-11-24T13:21:55","slug":"what-are-the-properties-and-applications-of-pva-film","status":"publish","type":"post","link":"https:\/\/customizepacking.com\/fr\/quelles-sont-les-proprietes-et-les-applications-du-film-pva\/","title":{"rendered":"Quelles sont les propri\u00e9t\u00e9s et les applications du film PVA ?"},"content":{"rendered":"

Introduction du film PVA<\/span><\/p>\n

\"Film<\/p>\n

Le film PVA, \u00e9galement connu sous le nom de film hydrosoluble PVA, est un mat\u00e9riau polym\u00e8re dont le composant de base est l'alcool polyvinylique. En raison de sa bonne solubilit\u00e9 dans l'eau, de sa biod\u00e9gradabilit\u00e9, de sa grande transparence et de sa large gamme d'utilisations, il est largement utilis\u00e9 dans les emballages pharmaceutiques, les emballages agricoles et certains emballages de mat\u00e9riaux de construction. Ce film pr\u00e9sente plusieurs avantages pour les applications d'emballage, et il se manifeste principalement dans les aspects suivants
\n1. Le film PVA a une r\u00e9sistance \u00e9lev\u00e9e, une bonne flexibilit\u00e9 et une bonne solubilit\u00e9 dans l'eau, ce qui en fait un choix id\u00e9al pour diverses applications.
\n2. Outre sa bonne solubilit\u00e9 dans l'eau, le film est \u00e9galement biod\u00e9gradable. Il peut \u00eatre d\u00e9grad\u00e9 en CO2 et H2O par les micro-organismes pr\u00e9sents dans l'eau ou le sol. Il est donc non toxique et inoffensif.
\n3. L'alcool polyvinylique lui-m\u00eame pr\u00e9sente d'excellentes qualit\u00e9s, telles que la r\u00e9sistance aux solvants, la r\u00e9sistance aux gaz, une transparence \u00e9lev\u00e9e et l'antistatique. C'est un type de mat\u00e9riau vert et respectueux de l'environnement. Il a \u00e9t\u00e9 reconnu par les services nationaux de protection de l'environnement en Europe, aux \u00c9tats-Unis, au Japon et dans d'autres pays. Des tests effectu\u00e9s par des tiers montrent que la demande biologique en oxyg\u00e8ne (DBO) de l'alcool polyvinylique est bien inf\u00e9rieure \u00e0 celle de l'amidon.
\n4. Les tests biologiques montrent que l'alcool polyvinylique est non toxique, emp\u00eachera la croissance et la reproduction de micro-organismes et n'a aucun effet sur le traitement des d\u00e9chets solides et la sant\u00e9 environnementale. Et l'alcool polyvinylique peut \u00eatre presque compl\u00e8tement d\u00e9compos\u00e9. Apr\u00e8s avoir p\u00e9n\u00e9tr\u00e9 dans le sol, il a pour effet d'am\u00e9liorer le sol.<\/p>\n

Les principes scientifiques derri\u00e8re le film PVA hydrosoluble<\/h2>\n

Les principes scientifiques derri\u00e8re le film hydrosoluble PVA concernent principalement ses propri\u00e9t\u00e9s physiques et chimiques, ainsi que son processus de d\u00e9gradation dans l'environnement.<\/p>\n

Solubilit\u00e9 dans l'eau<\/h3>\n

Le processus de dissolution du film soluble dans l'eau PVA (alcool polyvinylique) ne se fait pas par des r\u00e9actions chimiques, mais en utilisant le principe physique de l'homog\u00e9n\u00e9it\u00e9. Le PVA contient un grand nombre de groupes -OH dans sa structure mol\u00e9culaire, ce qui le rend tr\u00e8s hydrophile. Par cons\u00e9quent, lorsque le PVA entre en contact avec de l\u2019eau, il peut se dissoudre rapidement. Ce processus est principalement un changement physique et non chimique.<\/p>\n

Biod\u00e9gradabilit\u00e9<\/h3>\n

La biod\u00e9gradabilit\u00e9 du film hydrosoluble PVA est due \u00e0 sa structure mol\u00e9culaire et \u00e0 sa composition particuli\u00e8res. Dans le sol, le PVA peut \u00eatre d\u00e9compos\u00e9 par des bact\u00e9ries sp\u00e9cifiques, qui le d\u00e9composent en mol\u00e9cules plus petites par le biais de r\u00e9actions redox et d'enzymes, et finalement se d\u00e9gradent en dioxyde de carbone et en eau. Ce processus comprend l'enzyme d'oxydation en PVA catalytique, suivi d'hydrolases qui coupent la cha\u00eene principale du PVA oxyd\u00e9 et la d\u00e9gradent davantage en mol\u00e9cules plus petites.
\nAutres excellentes propri\u00e9t\u00e9s
\nDe plus, le film PVA soluble dans l'eau poss\u00e8de \u00e9galement d'excellentes propri\u00e9t\u00e9s m\u00e9caniques, propri\u00e9t\u00e9s de barri\u00e8re aux gaz, transparence, propri\u00e9t\u00e9s antistatiques et r\u00e9sistance aux solvants organiques. Ces propri\u00e9t\u00e9s font du film PVA soluble dans l\u2019eau un mat\u00e9riau d\u2019emballage vert et respectueux de l\u2019environnement id\u00e9al. Ce qui est largement utilis\u00e9 dans les domaines m\u00e9dicaux, les perles de gel \u00e0 lessive, les produits sanitaires et d'autres domaines.
\nEn r\u00e9sum\u00e9, la science derri\u00e8re le film PVA soluble dans l\u2019eau concerne ses propri\u00e9t\u00e9s physiques et chimiques, ainsi que le processus de biod\u00e9gradation dans l\u2019environnement. Ces caract\u00e9ristiques constituent ensemble la protection de l\u2019environnement et la base fonctionnelle du film PVA soluble dans l\u2019eau.<\/p>\n

Processus de production principal du film PVA<\/h2>\n

 <\/p>\n

Qu'est-ce qu'une bo\u00eete en papier \u00e0 fermeture \u00e0 pression\u00a0?<\/span>\u00c9crit par yangaijuan294@gmail.com
<\/span>22 juillet 2024<\/span><\/div><\/a><\/div>

\u00c0 l'heure actuelle, les m\u00e9thodes de fabrication de films PVA solubles dans l'eau dans le pays et \u00e0 l'\u00e9tranger comprennent principalement la m\u00e9thode de coul\u00e9e (m\u00e9thode humide) et la m\u00e9thode de soufflage de film par extrusion (m\u00e9thode s\u00e8che). Les deux proc\u00e9d\u00e9s sont \u00ab d\u00e9riv\u00e9s \u00bb de la production traditionnelle de films plastiques. Le PVA \u00e9tant une substance soluble dans l\u2019eau, les conditions du processus de fabrication du film sont diff\u00e9rentes de celles des plastiques thermoplastiques. Il existe donc encore de nombreux probl\u00e8mes techniques pour appliquer directement les deux proc\u00e9d\u00e9s ci-dessus \u00e0 la production de films PVA. Et cela entra\u00eene \u00e9galement certains probl\u00e8mes \u00e9conomiques, tels qu'un contr\u00f4le de qualit\u00e9 difficile, un faible rendement, une consommation d'\u00e9nergie \u00e9lev\u00e9e, une grande surface au sol et des investissements en \u00e9quipements \u00e9lev\u00e9s. Par cons\u00e9quent, il est tr\u00e8s important de rechercher et d\u2019am\u00e9liorer ces deux types de technologies et d\u2019\u00e9quipements de traitement pour les rendre plus adapt\u00e9s \u00e0 la production de films PVA. Et c\u2019est \u00e9galement le centre de recherche et de d\u00e9veloppement de l\u2019industrie au pays et \u00e0 l\u2019\u00e9tranger.
\nIntroduction de deux processus<\/p>\n

M\u00e9thode de coul\u00e9e<\/h3>\n

Le processus de production de base de la m\u00e9thode de coul\u00e9e en solution comprend\u00a0: PVA dissous dans l\u2019eau \u2192 rev\u00eatement moul\u00e9 \u2192 s\u00e9chage (traitement thermique) \u2192 pelage \u2192 enroulement \u2192 produit fini.
\nLe processus de coul\u00e9e est relativement simple, mais la qualit\u00e9 du produit n'est pas facile \u00e0 contr\u00f4ler, le taux de production du film est faible, la consommation d'\u00e9nergie est \u00e9lev\u00e9e et l'investissement en \u00e9quipement est important.<\/p>\n

M\u00e9thode du film souffl\u00e9<\/h3>\n

Le processus de film souffl\u00e9 par extrusion est le suivant\u00a0: mati\u00e8re premi\u00e8re PVA, eau, plastifiant, lubrifiant (pigment) \u2192 m\u00e9lange \u00e0 circulation forc\u00e9e \u2192 granulation par extrusion \u2192 film souffl\u00e9 par extrusion par fusion \u2192 traitement de modification \u2192 enroulement \u2192 produit fini.<\/p>\n

Comparaison entre le film Casting et le film Blown<\/h3>\n

La m\u00e9thode du film souffl\u00e9 par extrusion pr\u00e9sente des am\u00e9liorations \u00e9videntes par rapport \u00e0 la m\u00e9thode de coul\u00e9e en termes de qualit\u00e9 du produit et d\u2019efficacit\u00e9 de production. Mais le PVA doit \u00eatre modifi\u00e9 et granul\u00e9 d\u00e8s le d\u00e9but, ce qui augmente le processus et la quantit\u00e9 de mati\u00e8res auxiliaires ajout\u00e9es. La r\u00e9sine et le film doivent \u00eatre chauff\u00e9s \u00e0 plusieurs reprises pendant tout le processus de production. Et la teneur en eau dans le film doit \u00e9galement \u00eatre maintenue entre 15% et 35%. Le processus est complexe, la technologie est difficile et la consommation d\u2019\u00e9nergie est \u00e9lev\u00e9e. De plus, le film est form\u00e9, \u00e9tir\u00e9 et fa\u00e7onn\u00e9 en m\u00eame temps, la cha\u00eene mol\u00e9culaire est difficile \u00e0 d\u00e9placer, l'orientation est mauvaise. La r\u00e9sistance du film r\u00e9sultant n'est pas \u00e9lev\u00e9e et les caract\u00e9ristiques inh\u00e9rentes de la r\u00e9sine PVA ne sont pas pleinement exploit\u00e9es.<\/p>\n

Caract\u00e9ristiques de performance du film coul\u00e9 et du film souffl\u00e9<\/h3>\n

Avantages et inconv\u00e9nients du film coul\u00e9<\/h4>\n

1. Avantages du film coul\u00e9 : \u00e9paisseur uniforme, transparence \u00e9lev\u00e9e, bonne r\u00e9sistance et plan\u00e9it\u00e9 \u00e9lev\u00e9e. Il convient \u00e0 la fabrication de divers sacs d'emballage, papier kraft, couvertures de reliure, etc.
\n2. Inconv\u00e9nients du film coul\u00e9 : la surface est l\u00e9g\u00e8rement moins bonne que celle du film souffl\u00e9 et n'est pas assez lisse. Par cons\u00e9quent, si un produit avec une qualit\u00e9 de surface tr\u00e8s lisse est requis, il peut \u00eatre plus appropri\u00e9 de le produire par film souffl\u00e9.<\/p>\n

Avantages et inconv\u00e9nients du film souffl\u00e9<\/h4>\n

1. Avantages du film souffl\u00e9<\/p>\n

Vitesse de production rapide, bonne qualit\u00e9 de surface, bonne s\u00e9paration du film m\u00e8re-enfant, adapt\u00e9 \u00e0 la fabrication de produits \u00e0 haute transparence et \u00e0 haute luminosit\u00e9, et peut \u00eatre utilis\u00e9 pour fabriquer des boissons froides et des emballages d'aliments surgel\u00e9s.
\n2. Inconv\u00e9nients du film souffl\u00e9<\/p>\n

A quoi servent les sacs en papier cir\u00e9 ?<\/span>\u00c9crit par yangaijuan294@gmail.com
<\/span>22 juillet 2024<\/span><\/div><\/a><\/div>

\u00c9paisseur in\u00e9gale et mauvaise plan\u00e9it\u00e9. En particulier, le bord du film souffl\u00e9 pr\u00e9sente g\u00e9n\u00e9ralement un changement d'\u00e9paisseur important, il ne peut donc pas \u00eatre utilis\u00e9 pour des produits n\u00e9cessitant une brillance \u00e9lev\u00e9e.<\/p>\n

Comment mieux utiliser le film PVA hydrosoluble<\/h2>\n

\"Les<\/span><\/p>\n

Le film hydrosoluble PVA pr\u00e9sente d'excellentes propri\u00e9t\u00e9s physiques et chimiques. Et le film produit par diff\u00e9rents proc\u00e9d\u00e9s de production pr\u00e9sente ses propres avantages et inconv\u00e9nients. Alors, comment faire bon usage du film hydrosoluble PVA ?
\nPremi\u00e8rement, du point de vue de la temp\u00e9rature de solubilit\u00e9 dans l'eau, les films solubles dans l'eau sont principalement divis\u00e9s en films solubles dans l'eau froide et en films solubles dans l'eau chaude.
\nLes films solubles dans l'eau froide sont principalement utilis\u00e9s pour emballer des produits qui doivent \u00eatre dissous directement dans de l'eau froide ou de l'eau \u00e0 temp\u00e9rature ambiante. Cela comprend les emballages de pesticides, les emballages de d\u00e9tergents \u00e0 lessive, les emballages d'agents de traitement de l'eau, les emballages de semences, les emballages de b\u00e9ton, etc.<\/p>\n

Les films hydrosolubles sont principalement utilis\u00e9s pour emballer des produits qui ne doivent pas \u00eatre dissous \u00e0 temp\u00e9rature ambiante mais doivent \u00eatre emball\u00e9s avec des produits hydrosolubles. Cela comprend les emballages de produits \u00e9lectroniques, les sacs de courses, les sacs \u00e0 crottes de chien, les sacs \u00e0 linge, etc.<\/p>\n

Deuxi\u00e8mement, du point de vue du processus, les films hydrosolubles sont divis\u00e9s en films coul\u00e9s et films souffl\u00e9s.
\nLe film coul\u00e9 pr\u00e9sente une \u00e9paisseur uniforme, une plan\u00e9it\u00e9 relativement \u00e9lev\u00e9e et une transparence \u00e9lev\u00e9e. Par cons\u00e9quent, dans certaines situations o\u00f9 les exigences de performance des films hydrosolubles sont relativement \u00e9lev\u00e9es, le film coul\u00e9 pr\u00e9sente des avantages relativement \u00e9lev\u00e9s, comme le film coul\u00e9 pour les films de d\u00e9moulage de marbre artificiel ou de pierre de quartz.
\nAlors que les films soufflants sont g\u00e9n\u00e9ralement utilis\u00e9s pour fabriquer diff\u00e9rents sacs.<\/p>\n

En conclusion, il est important de comprendre les propri\u00e9t\u00e9s physiques et chimiques des films hydrosolubles, les avantages et les inconv\u00e9nients des diff\u00e9rents proc\u00e9d\u00e9s de production. Cela nous aidera \u00e0 mieux utiliser les films hydrosolubles pour atteindre l'objectif d'am\u00e9lioration de l'efficacit\u00e9 de la production.
\nDans le m\u00eame temps, il peut \u00e9galement bien prot\u00e9ger l\u2019environnement en utilisant un film soluble dans l\u2019eau.<\/p>\n

Conclusion<\/h2>\n

Le film hydrosoluble PVA est un type de nouvelle technologie r\u00e9volutionnaire qui a compl\u00e8tement chang\u00e9 l'industrie de l'emballage ou d'autres industries. Ils sont compl\u00e8tement solubles dans l'eau et pr\u00e9sentent de nombreux avantages pour les applications d'emballage. Ils sont notamment solides, flexibles et solubles dans l'eau. De plus, ils sont biod\u00e9gradables, compostables, rentables et polyvalents. Pour toutes ces raisons, c'est un choix id\u00e9al pour une vari\u00e9t\u00e9 d'applications d'emballage.<\/p>","protected":false},"excerpt":{"rendered":"

Pr\u00e9sentation du film PVA Le film PVA, \u00e9galement connu sous le nom de film PVA hydrosoluble, est un mat\u00e9riau polym\u00e8re dont le composant de base est l'alcool polyvinylique. En raison de sa bonne solubilit\u00e9 dans l'eau, de sa biod\u00e9gradabilit\u00e9, de sa grande transparence et de sa large gamme d'utilisations, il est largement utilis\u00e9 dans les emballages pharmaceutiques, les emballages agricoles et certains emballages de mat\u00e9riaux de construction. Ce film a plusieurs [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9397","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nWhat are the properties and applications of PVA Film? - HongRen<\/title>\n<meta name=\"description\" content=\"Understanding the physical& chemical properties, the different production processes of the pva film will help us to use it better .\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/customizepacking.com\/fr\/quelles-sont-les-proprietes-et-les-applications-du-film-pva\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are the properties and applications of PVA Film?\" \/>\n<meta property=\"og:description\" content=\"Understanding the physical& chemical properties, the different production processes of the pva film will help us to use it better .\" \/>\n<meta property=\"og:url\" content=\"https:\/\/customizepacking.com\/fr\/quelles-sont-les-proprietes-et-les-applications-du-film-pva\/\" \/>\n<meta property=\"og:site_name\" content=\"HongRen\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-22T14:03:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-11-24T13:21:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/customizepacking.com\/wp-content\/uploads\/2024\/07\/PVA-film-casting-film.png\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"yangaijuan294@gmail.com\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"yangaijuan294@gmail.com\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/\"},\"author\":{\"name\":\"yangaijuan294@gmail.com\",\"@id\":\"https:\\\/\\\/customizepacking.com\\\/#\\\/schema\\\/person\\\/4a9e66652aaaaebcdc40ba9b1364d0c0\"},\"headline\":\"What are the properties and applications of PVA Film?\",\"datePublished\":\"2024-07-22T14:03:19+00:00\",\"dateModified\":\"2024-11-24T13:21:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/\"},\"wordCount\":1353,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/customizepacking.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/customizepacking.com\\\/wp-content\\\/uploads\\\/2024\\\/07\\\/PVA-film-casting-film.png\",\"articleSection\":[\"Uncategorized\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/\",\"url\":\"https:\\\/\\\/customizepacking.com\\\/what-are-the-properties-and-applications-of-pva-film\\\/\",\"name\":\"What are the properties and applications of PVA Film? 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