{"id":1184,"date":"2026-03-26T07:12:42","date_gmt":"2026-03-26T07:12:42","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=method&p=1184"},"modified":"2026-03-26T07:17:05","modified_gmt":"2026-03-26T07:17:05","slug":"falling-dart-impact-test","status":"publish","type":"method","link":"https:\/\/www.packtests.com\/cs\/method\/falling-dart-impact-test\/","title":{"rendered":"N\u00e1razov\u00e1 zkou\u0161ka padaj\u00edc\u00ed \u0161ipkou"},"content":{"rendered":"

Na str\u00e1nk\u00e1ch n\u00e1razov\u00e1 zkou\u0161ka padaj\u00edc\u00ed \u0161ipkou<\/strong> je z\u00e1sadn\u00ed pro hodnocen\u00ed odolnosti plastov\u00fdch f\u00f3li\u00ed proti n\u00e1razu. P\u0159i t\u00e9to zkou\u0161ce se m\u011b\u0159\u00ed energie pot\u0159ebn\u00e1 k selh\u00e1n\u00ed vzorku, kdy\u017e je vystaven voln\u011b padaj\u00edc\u00ed \u0161ipce za kontrolovan\u00fdch podm\u00ednek. Posouzen\u00edm r\u00e1zov\u00e9 odolnosti mohou v\u00fdrobci zajistit trvanlivost a v\u00fdkonnost plastov\u00fdch f\u00f3li\u00ed pou\u017e\u00edvan\u00fdch v r\u016fzn\u00fdch aplikac\u00edch.<\/p>\n\n\n\n

ASTM D1709: Norma pro zkou\u0161ku n\u00e1razem padaj\u00edc\u00ed \u0161ipky<\/h2>\n\n\n\n

Na str\u00e1nk\u00e1ch ASTM D1709<\/strong> norma popisuje postupy pro stanoven\u00ed energie pot\u0159ebn\u00e9 k rozbit\u00ed plastov\u00fdch f\u00f3li\u00ed pomoc\u00ed voln\u011b padaj\u00edc\u00ed \u0161ipky. Specifikuje dv\u011b zku\u0161ebn\u00ed metody pro hodnocen\u00ed odolnosti f\u00f3li\u00ed proti n\u00e1razu za \u0159\u00edzen\u00fdch podm\u00ednek.<\/p>\n\n\n\n

    \n
  1. Zku\u0161ebn\u00ed metoda A<\/strong>: P\u0159i t\u00e9to metod\u011b se pou\u017e\u00edv\u00e1 polokulovit\u00e1 \u0161ipka o pr\u016fm\u011bru 38,10 mm upu\u0161t\u011bn\u00e1 z v\u00fd\u0161ky 0,66 metru. Je vhodn\u00e1 pro f\u00f3lie, kter\u00e9 vy\u017eaduj\u00ed k prasknut\u00ed energii n\u00e1razu od 50 g do 6 kg.<\/li>\n\n\n\n
  2. Zku\u0161ebn\u00ed metoda B<\/strong>: P\u0159i t\u00e9to metod\u011b se pou\u017e\u00edv\u00e1 \u0161ipka o pr\u016fm\u011bru 50,80 mm upu\u0161t\u011bn\u00e1 z v\u00fd\u0161ky 1,52 metru, co\u017e je ide\u00e1ln\u00ed pro filmy, jejich\u017e selh\u00e1n\u00ed vy\u017eaduje energii od 0,3 kg do 6 kg.<\/li>\n<\/ol>\n\n\n\n

    Zkou\u0161ka spo\u010d\u00edv\u00e1 v postupn\u00e9m zvy\u0161ov\u00e1n\u00ed nebo sni\u017eov\u00e1n\u00ed hmotnosti \u0161ipky, dokud 50% vzork\u016f nevyhov\u00ed, \u010d\u00edm\u017e se p\u0159esn\u011b zm\u011b\u0159\u00ed odolnost f\u00f3lie proti n\u00e1razu.<\/p>\n\n\n\n

    ISO 7765-1 a r\u00e1zov\u00e1 zkou\u0161ka plastov\u00fdch f\u00f3li\u00ed \u0161ipkami<\/h2>\n\n\n\n

    Na str\u00e1nk\u00e1ch ISO 7765-1<\/strong> norma nab\u00edz\u00ed podobn\u00e9 pokyny pro zkou\u0161en\u00ed energie n\u00e1razov\u00e9ho selh\u00e1n\u00ed plastov\u00fdch f\u00f3li\u00ed za stanoven\u00fdch podm\u00ednek. Jak norma ASTM D1709, tak norma ISO 7765-1 pou\u017e\u00edvaj\u00ed dv\u011b r\u016fzn\u00e9 metody pro hodnocen\u00ed odolnosti tenk\u00fdch plastov\u00fdch f\u00f3li\u00ed a desek proti n\u00e1razu:<\/p>\n\n\n\n

      \n
    • Metoda A<\/strong>: Pou\u017e\u00edv\u00e1 38mm \u0161ipku hozenou z v\u00fd\u0161ky 0,66 m, vhodnou pro materi\u00e1ly, kter\u00e9 se l\u00e1mou v rozmez\u00ed 50 g a\u017e 2 kg.<\/li>\n\n\n\n
    • Metoda B<\/strong>: Pou\u017e\u00edv\u00e1 50mm \u0161ipku hozenou z v\u00fd\u0161ky 1,5 metru s rozsahem dopadov\u00e9 energie 0,3 kg a\u017e 2 kg.<\/li>\n<\/ul>\n\n\n\n

      Tyto normy pom\u00e1haj\u00ed v\u00fdrobc\u016fm, t\u00fdm\u016fm kontroly kvality a v\u00fdzkumn\u00fdm pracovn\u00edk\u016fm zajistit, aby jejich plastov\u00e9 f\u00f3lie spl\u0148ovaly po\u017eadovan\u00e1 krit\u00e9ria pro konkr\u00e9tn\u00ed aplikace.<\/p>\n\n\n\n

      V\u00fdznam n\u00e1razov\u00fdch zkou\u0161ek padaj\u00edc\u00edch \u0161ipek<\/h2>\n\n\n\n

      Na str\u00e1nk\u00e1ch n\u00e1razov\u00e1 zkou\u0161ka padaj\u00edc\u00ed \u0161ipkou<\/strong> m\u00e1 z\u00e1sadn\u00ed v\u00fdznam pro pr\u016fmyslov\u00e1 odv\u011btv\u00ed, kter\u00e1 pou\u017e\u00edvaj\u00ed plastov\u00e9 f\u00f3lie v obalech, automobilov\u00e9m pr\u016fmyslu, zdravotnick\u00fdch prost\u0159edc\u00edch a textilu. Tento test pom\u00e1h\u00e1 ur\u010dit, jak dob\u0159e f\u00f3lie odol\u00e1vaj\u00ed po\u0161kozen\u00ed p\u0159i manipulaci, p\u0159eprav\u011b a v podm\u00ednk\u00e1ch kone\u010dn\u00e9ho pou\u017eit\u00ed. U f\u00f3li\u00ed s vysokou odolnost\u00ed proti n\u00e1razu je m\u00e9n\u011b pravd\u011bpodobn\u00e9, \u017ee se roztrhnou, prop\u00edchnou nebo sel\u017eou, co\u017e zaji\u0161\u0165uje, \u017ee si zachovaj\u00ed integritu po celou dobu sv\u00e9 \u017eivotnosti.<\/p>\n\n\n\n

      Test poskytuje cenn\u00e9 \u00fadaje pro:<\/p>\n\n\n\n

        \n
      • Specifikace produktu<\/strong>: Stanoven\u00ed minim\u00e1ln\u00ed odolnosti proti n\u00e1razu po\u017eadovan\u00e9 pro obalov\u00e9 materi\u00e1ly.<\/li>\n\n\n\n
      • Kontrola kvality<\/strong>: Zaji\u0161t\u011bn\u00ed, aby ka\u017ed\u00e1 \u0161ar\u017ee plastov\u00e9 f\u00f3lie spl\u0148ovala normy konzistence a trvanlivosti.<\/li>\n\n\n\n
      • V\u00fdzkum a v\u00fdvoj materi\u00e1l\u016f<\/strong>: Pom\u00e1h\u00e1 vyv\u00edjet nov\u00e9 materi\u00e1ly se zv\u00fd\u0161enou odolnost\u00ed proti n\u00e1razu pro specializovan\u00e9 aplikace.<\/li>\n<\/ul>\n\n\n\n

        Jak funguje n\u00e1razov\u00fd test padaj\u00edc\u00ed \u0161ipky<\/h2>\n\n\n\n
          \n
        1. P\u0159\u00edprava vzork\u016f<\/strong>: Vzorky plastov\u00fdch f\u00f3li\u00ed se kondicionuj\u00ed a testuj\u00ed za specifick\u00fdch teplotn\u00edch a vlhkostn\u00edch podm\u00ednek.<\/li>\n\n\n\n
        2. Nastaven\u00ed testu<\/strong>: \u0160ipka se vypust\u00ed z p\u0159edem definovan\u00e9 v\u00fd\u0161ky a zm\u011b\u0159\u00ed se energie pot\u0159ebn\u00e1 k rozlomen\u00ed vzorku.<\/li>\n\n\n\n
        3. Sb\u011br dat<\/strong>: Hmotnost \u0161ipky se postupn\u011b upravuje na z\u00e1klad\u011b selh\u00e1n\u00ed vzork\u016f. Zaznamen\u00e1 se energie pot\u0159ebn\u00e1 k dosa\u017een\u00ed m\u00edry selh\u00e1n\u00ed 50%.<\/li>\n<\/ol>\n\n\n\n

          Dodr\u017eov\u00e1n\u00edm t\u011bchto postup\u016f se n\u00e1razov\u00e1 zkou\u0161ka padaj\u00edc\u00ed \u0161ipkou<\/strong> zaji\u0161\u0165uje p\u0159esn\u00e9 a spolehliv\u00e9 v\u00fdsledky, kter\u00e9 poskytuj\u00ed z\u00e1sadn\u00ed informace o trvanlivosti filmu.<\/p>\n\n\n\n

          Aplikace n\u00e1razov\u00e9 zkou\u0161ky padaj\u00edc\u00ed \u0161ipkou<\/h2>\n\n\n\n

          Tato zkou\u0161ka se \u0161iroce pou\u017e\u00edv\u00e1 v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch k hodnocen\u00ed vlastnost\u00ed plastov\u00fdch f\u00f3li\u00ed. Mezi b\u011b\u017en\u00e9 aplikace pat\u0159\u00ed:<\/p>\n\n\n\n

            \n
          • Balen\u00ed<\/strong>: Pro stanoven\u00ed trvanlivosti materi\u00e1l\u016f, jako jsou smr\u0161\u0165ovac\u00ed f\u00f3lie, obaly na potraviny a ochrann\u00e9 obaly.<\/li>\n\n\n\n
          • Automobilov\u00fd pr\u016fmysl<\/strong>: Zkou\u0161ka pevnosti plastov\u00fdch f\u00f3li\u00ed pou\u017e\u00edvan\u00fdch v sou\u010d\u00e1stech vozidel.<\/li>\n\n\n\n
          • Zdravotnick\u00e9 prost\u0159edky<\/strong>: Zaji\u0161t\u011bn\u00ed odolnosti f\u00f3li\u00ed pou\u017e\u00edvan\u00fdch ve zdravotnick\u00fdch obalech proti n\u00e1razu.<\/li>\n\n\n\n
          • Textil<\/strong>: Pro testov\u00e1n\u00ed vlastnost\u00ed f\u00f3li\u00ed pou\u017e\u00edvan\u00fdch v ochrann\u00fdch od\u011bvech a textiln\u00edch povlac\u00edch.<\/li>\n<\/ul>\n\n\n\n

            Z\u00e1v\u011br<\/h2>\n\n\n\n

            Na str\u00e1nk\u00e1ch n\u00e1razov\u00e1 zkou\u0161ka padaj\u00edc\u00ed \u0161ipkou<\/strong> je rozhoduj\u00edc\u00edm postupem pro posouzen\u00ed trvanlivosti a odolnosti plastov\u00fdch f\u00f3li\u00ed proti n\u00e1razu. Dodr\u017eov\u00e1n\u00edm ASTM D1709<\/strong> a ISO 7765-1<\/strong> normy, mohou v\u00fdrobci zajistit spolehlivost sv\u00fdch materi\u00e1l\u016f v \u0159ad\u011b pr\u016fmyslov\u00fdch odv\u011btv\u00ed. A\u0165 u\u017e se jedn\u00e1 o obaly, automobilov\u00fd pr\u016fmysl, zdravotnictv\u00ed nebo textil, v\u00fdsledky t\u00e9to zkou\u0161ky poskytuj\u00ed cenn\u00e9 \u00fadaje pro kontrolu kvality, v\u00fdvoj v\u00fdrobk\u016f a specifikace materi\u00e1l\u016f.<\/p>\n\n\n\n

            Pro p\u0159esn\u00e9 a spolehliv\u00e9 testov\u00e1n\u00ed zva\u017ete pou\u017eit\u00ed Cell Instruments\u2019 Tester n\u00e1razu padaj\u00edc\u00ed \u0161ipky<\/strong>, navr\u017een\u00e9 tak, aby spl\u0148ovaly p\u0159\u00edsn\u00e9 po\u017eadavky norem ASTM D1709 a ISO 7765-1, co\u017e zaru\u010duje, \u017ee va\u0161e materi\u00e1ly budou fungovat co nejl\u00e9pe.<\/p>","protected":false},"excerpt":{"rendered":"

            N\u00e1razov\u00e1 zkou\u0161ka padaj\u00edc\u00ed \u0161ipkou je nezbytn\u00e1 pro hodnocen\u00ed odolnosti plastov\u00fdch f\u00f3li\u00ed proti n\u00e1razu. Touto zkou\u0161kou se m\u011b\u0159\u00ed energie pot\u0159ebn\u00e1 k poru\u0161en\u00ed vzorku, kdy\u017e je vystaven voln\u011b padaj\u00edc\u00ed \u0161ipce za kontrolovan\u00fdch podm\u00ednek. Posouzen\u00edm r\u00e1zov\u00e9 odolnosti mohou v\u00fdrobci zajistit trvanlivost a v\u00fdkonnost plastov\u00fdch f\u00f3li\u00ed pou\u017e\u00edvan\u00fdch v r\u016fzn\u00fdch aplikac\u00edch. [...]<\/p>","protected":false},"featured_media":1185,"parent":0,"template":"","meta":{"_acf_changed":true},"class_list":["post-1184","method","type-method","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/method\/1184","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/method"}],"about":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/types\/method"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media\/1185"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/cs\/wp-json\/wp\/v2\/media?parent=1184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}