{"id":63486,"date":"2022-06-02T19:58:36","date_gmt":"2022-06-03T00:58:36","guid":{"rendered":"https:\/\/www.bjultrasonic.com\/how-is-the-foil-test-done\/"},"modified":"2025-01-27T06:06:34","modified_gmt":"2025-01-27T11:06:34","slug":"how-is-the-foil-test-done","status":"publish","type":"post","link":"https:\/\/www.bjultrasonic.com\/cs\/how-is-the-foil-test-done\/","title":{"rendered":"Test hlin\u00edkovou f\u00f3li\u00ed: Podrobn\u00fd n\u00e1vod a vysv\u011btlen\u00ed"},"content":{"rendered":"<p>Testov\u00e1n\u00ed f\u00f3li\u00ed, neboli zkou\u0161ka f\u00f3li\u00ed, je d\u016fle\u017eit\u00fdm postupem pro ov\u011b\u0159en\u00ed kvality a vlastnost\u00ed r\u016fzn\u00fdch typ\u016f f\u00f3li\u00ed.  Metody testov\u00e1n\u00ed se li\u0161\u00ed v z\u00e1vislosti na zam\u00fd\u0161len\u00e9m pou\u017eit\u00ed f\u00f3lie a po\u017eadovan\u00fdch vlastnostech.  Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na n\u011bkter\u00e9 b\u011b\u017en\u00e9 metody testov\u00e1n\u00ed f\u00f3li\u00ed a jejich postup.<\/p>\n<p>Tlou\u0161\u0165kom\u011br<\/p>\n<p>Jednou z nejjednodu\u0161\u0161\u00edch a nejb\u011b\u017en\u011bj\u0161\u00edch metod je m\u011b\u0159en\u00ed tlou\u0161\u0165ky f\u00f3lie.  K tomu se pou\u017e\u00edvaj\u00ed speci\u00e1ln\u00ed tlou\u0161\u0165kom\u011bry, kter\u00e9 mohou b\u00fdt mechanick\u00e9, digit\u00e1ln\u00ed nebo optick\u00e9.  Mechanick\u00e9 tlou\u0161\u0165kom\u011bry funguj\u00ed na principu m\u011b\u0159en\u00ed pr\u016fhybu sondy pod tlakem f\u00f3lie. Digit\u00e1ln\u00ed tlou\u0161\u0165kom\u011bry poskytuj\u00ed p\u0159esn\u011bj\u0161\u00ed a digit\u00e1ln\u011b zobrazen\u00e1 m\u011b\u0159en\u00ed.  Optick\u00e9 metody, jako je interferometrie, umo\u017e\u0148uj\u00ed m\u011b\u0159en\u00ed tlou\u0161\u0165ky i u velmi tenk\u00fdch f\u00f3li\u00ed s vysokou p\u0159esnost\u00ed.  V\u00fdsledky m\u011b\u0159en\u00ed se zaznamen\u00e1vaj\u00ed a porovn\u00e1vaj\u00ed s po\u017eadovan\u00fdmi parametry.  D\u016fle\u017eit\u00e1 je spr\u00e1vn\u00e1 kalibrace p\u0159\u00edstroje p\u0159ed samotn\u00fdm m\u011b\u0159en\u00edm.<\/p>\n<p>Test pevnosti v tahu<\/p>\n<p>Tento test ur\u010duje pevnost f\u00f3lie v tahu a jej\u00ed elasticitu.  Vzorek f\u00f3lie se upevn\u00ed do zku\u0161ebn\u00edho stroje a postupn\u011b se natahuje, dokud se nep\u0159etrhne.  Zku\u0161ebn\u00ed stroj zaznamen\u00e1v\u00e1 s\u00edlu pot\u0159ebnou k nata\u017een\u00ed a prodlou\u017een\u00ed vzorku.  Z\u00edskan\u00e9 \u00fadaje se pou\u017eij\u00ed k v\u00fdpo\u010dtu pevnosti v tahu, prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed a dal\u0161\u00edch parametr\u016f.  V\u00fdsledky umo\u017e\u0148uj\u00ed posoudit odolnost f\u00f3lie proti mechanick\u00e9mu nam\u00e1h\u00e1n\u00ed.<\/p>\n<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>Parametr<\/th>\n<th>Jednotka<\/th>\n<th>Typick\u00fd rozsah pro potravin\u00e1\u0159skou f\u00f3lii<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Pevnost v tahu<\/td>\n<td>MPa<\/td>\n<td>10 &#8211; 30<\/td>\n<\/tr>\n<tr>\n<td>Prodlou\u017een\u00ed p\u0159i p\u0159etr\u017een\u00ed<\/td>\n<td>%<\/td>\n<td>200 &#8211; 500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Test propustnosti pro plyny a p\u00e1ry<\/p>\n<p>Tento test hodnot\u00ed propustnost f\u00f3lie pro r\u016fzn\u00e9 plyny a p\u00e1ry, jako je kysl\u00edk, dus\u00edk, vodn\u00ed p\u00e1ra atd.  Vzorek f\u00f3lie se um\u00eds\u0165uje do speci\u00e1ln\u00ed komory s definovanou atmosf\u00e9rou.  M\u011b\u0159\u00ed se rychlost dif\u00faze plyn\u016f a par skrz f\u00f3lii.  V\u00fdsledky se vyjad\u0159uj\u00ed jako propustnost (nap\u0159. v cm\u00b3\/m\u00b2\/den).  Tento test je velmi d\u016fle\u017eit\u00fd pro f\u00f3lie pou\u017e\u00edvan\u00e9 v obalech potravin, kde je pot\u0159eba zabr\u00e1nit pronik\u00e1n\u00ed kysl\u00edku a vodn\u00ed p\u00e1ry.<\/p>\n<p>Test propustnosti pro vodu<\/p>\n<p>Podobn\u011b jako test propustnosti pro plyny a p\u00e1ry, tento test ur\u010duje rychlost pronik\u00e1n\u00ed vody skrz f\u00f3lii.  Vzorek se pono\u0159\u00ed do vody a m\u011b\u0159\u00ed se mno\u017estv\u00ed vody, kter\u00e9 proniklo f\u00f3li\u00ed za danou dobu.  V\u00fdsledky se vyjad\u0159uj\u00ed jako propustnost vody (nap\u0159. v g\/m\u00b2\/den).  Tento test je d\u016fle\u017eit\u00fd pro f\u00f3lie pou\u017e\u00edvan\u00e9 v obalech, kter\u00e9 mus\u00ed chr\u00e1nit p\u0159ed vlhkost\u00ed.<\/p>\n<p>Vizualizace a mikroskopie<\/p>\n<p>Pro posouzen\u00ed struktury a p\u0159\u00edpadn\u00fdch defekt\u016f f\u00f3lie se pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 mikroskopick\u00e9 techniky, jako je optick\u00e1 mikroskopie nebo elektronov\u00e1 mikroskopie.  Tyto metody umo\u017e\u0148uj\u00ed zv\u011bt\u0161en\u00ed obrazu f\u00f3lie a detailn\u00ed anal\u00fdzu jej\u00ed struktury, identifikaci ne\u010distot a defekt\u016f.<\/p>\n<p>Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee testov\u00e1n\u00ed f\u00f3li\u00ed je komplexn\u00ed proces zahrnuj\u00edc\u00ed \u0159adu r\u016fzn\u00fdch metod.  Volba konkr\u00e9tn\u00edch metod z\u00e1vis\u00ed na po\u017eadavc\u00edch na kvalitu a vlastnosti f\u00f3lie a jej\u00edm zam\u00fd\u0161len\u00e9m pou\u017eit\u00ed.  Pou\u017eit\u00ed modern\u00edch p\u0159\u00edstroj\u016f a metod umo\u017e\u0148uje p\u0159esn\u00e9 a spolehliv\u00e9 testov\u00e1n\u00ed a zaji\u0161t\u011bn\u00ed kvality f\u00f3li\u00ed pro r\u016fzn\u00e9 aplikace.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Testov\u00e1n\u00ed f\u00f3li\u00ed, neboli zkou\u0161ka f\u00f3li\u00ed, je d\u016fle\u017eit\u00fdm postupem pro ov\u011b\u0159en\u00ed kvality a vlastnost\u00ed r\u016fzn\u00fdch typ\u016f f\u00f3li\u00ed. Metody testov\u00e1n\u00ed se li\u0161\u00ed v z\u00e1vislosti na zam\u00fd\u0161len\u00e9m pou\u017eit\u00ed f\u00f3lie a po\u017eadovan\u00fdch vlastnostech. Tento \u010dl\u00e1nek se zam\u011b\u0159\u00ed na n\u011bkter\u00e9 b\u011b\u017en\u00e9 metody testov\u00e1n\u00ed f\u00f3li\u00ed a jejich postup. Tlou\u0161\u0165kom\u011br Jednou z nejjednodu\u0161\u0161\u00edch a nejb\u011b\u017en\u011bj\u0161\u00edch metod je m\u011b\u0159en\u00ed tlou\u0161\u0165ky f\u00f3lie. K tomu<\/p>\n","protected":false},"author":1,"featured_media":20058,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6415],"tags":[],"class_list":["post-63486","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","prodpage-classic"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/63486","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/comments?post=63486"}],"version-history":[{"count":0,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/posts\/63486\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media\/20058"}],"wp:attachment":[{"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/media?parent=63486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/categories?post=63486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bjultrasonic.com\/cs\/wp-json\/wp\/v2\/tags?post=63486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}