{"id":8173,"date":"2025-11-26T09:36:57","date_gmt":"2025-11-26T01:36:57","guid":{"rendered":"https:\/\/www.packqc.com\/?p=8173"},"modified":"2025-11-26T09:38:11","modified_gmt":"2025-11-26T01:38:11","slug":"dart-impact-test-guide-for-plastics-with-astm-d1709-methods","status":"publish","type":"post","link":"https:\/\/www.packqc.com\/sk\/dart-impact-test-guide-for-plastics-with-astm-d1709-methods\/","title":{"rendered":"R\u00e1zov\u00e1 sk\u00fa\u0161ka plastov\u00fdch f\u00f3li\u00ed a obalov\u00fdch materi\u00e1lov \u0161\u00edpkou"},"content":{"rendered":"
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Pr\u00edru\u010dka pre n\u00e1razov\u00e9 sk\u00fa\u0161ky plastov s met\u00f3dami ASTM D1709<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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R\u00e1zov\u00e1 sk\u00fa\u0161ka plastov\u00fdch f\u00f3li\u00ed a obalov\u00fdch materi\u00e1lov \u0161\u00edpkou<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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V\u00fdrobcovia plastov\u00fdch f\u00f3li\u00ed, spracovatelia a laborat\u00f3ri\u00e1 na kontrolu kvality pou\u017e\u00edvaj\u00fa n\u00e1razov\u00e1 sk\u00fa\u0161ka \u0161\u00edpkou<\/strong> vyhodnoti\u0165, ako dobre obalov\u00e9 materi\u00e1ly odol\u00e1vaj\u00fa n\u00e1razu padaj\u00faceho projektilu. Ke\u010f\u017ee sa flexibiln\u00e9 obaly neust\u00e1le vyv\u00edjaj\u00fa, pochopenie tohto testu je nevyhnutn\u00e9 na zabezpe\u010denie odolnosti f\u00f3lie, zabr\u00e1nenie po\u0161kodeniu pri preprave a splnenie glob\u00e1lnych regula\u010dn\u00fdch o\u010dak\u00e1van\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Pochopenie testu n\u00e1razu \u0161\u00edpky a jeho v\u00fdznamu<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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The n\u00e1razov\u00e1 sk\u00fa\u0161ka \u0161\u00edpkou<\/strong> meria energiu potrebn\u00fa na sp\u00f4sobenie poruchy plastovej f\u00f3lie, ke\u010f do nej z pevnej v\u00fd\u0161ky naraz\u00ed polgu\u013eov\u00e1 strela. T\u00e1to met\u00f3da hodnotenia pom\u00e1ha predpoveda\u0165 re\u00e1lne vlastnosti vr\u00e1tane zlyhania pri p\u00e1de po\u010das prepravy, celistvosti obalu pri manipul\u00e1cii a celkovej h\u00fa\u017eevnatosti tenkovrstvov\u00fdch materi\u00e1lov.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Normy ASTM D1709 a ISO 7765 definuj\u00fa \u0161tandardn\u00e9 postupy, ktor\u00e9 \u0161pecifikuj\u00fa ve\u013ekosti \u0161\u00edpok, v\u00fd\u0161ky p\u00e1du, po\u017eiadavky na kondicionovanie a met\u00f3dy v\u00fdpo\u010dtu na ur\u010denie energie zlyhania 50% (zn\u00e1mej aj ako hmotnos\u0165 pri zlyhan\u00ed n\u00e1razu<\/strong>). Ke\u010f\u017ee tento test odr\u00e1\u017ea kombinovan\u00fd pr\u00edspevok zlo\u017eenia f\u00f3lie, kvality vytl\u00e1\u010dania a rovnomernosti hr\u00fabky, je \u0161iroko pou\u017e\u00edvan\u00fd pri v\u00fdrobe f\u00f3li\u00ed, balen\u00ed potrav\u00edn, farmaceutick\u00fdch blistrov a mnoh\u00fdch aplik\u00e1ci\u00e1ch flexibiln\u00fdch obalov.<\/p>

V\u00fdrobcovia sa \u010dasto spoliehaj\u00fa na tento test pri vytv\u00e1ran\u00ed \u0161pecifik\u00e1ci\u00ed, kvalifik\u00e1cii nov\u00fdch materi\u00e1lov a be\u017enej kontrole kvality. V spojen\u00ed s vysoko presn\u00fdm pr\u00edstrojom, ako je napr. Cell Instruments Tester n\u00e1razov padaj\u00facich \u0161\u00edpok<\/em>, sa st\u00e1va nepostr\u00e1date\u013en\u00fdm n\u00e1strojom na minimaliz\u00e1ciu riz\u00edk zlyhania materi\u00e1lu a zabezpe\u010denie konzistentnej mechanickej v\u00fdkonnosti.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Ako funguje n\u00e1razov\u00fd test \u0161\u00edpkami<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Pri sk\u00fa\u0161ke n\u00e1razom \u0161\u00edpky sa pou\u017e\u00edva vo\u013ene padaj\u00faca polgu\u013eov\u00e1 \u0161\u00edpka, ktor\u00e1 pad\u00e1 vertik\u00e1lne na upnut\u00fa vzorku f\u00f3lie. F\u00f3lia bu\u010f zlyh\u00e1, alebo vydr\u017e\u00ed n\u00e1raz. Regulovan\u00edm pr\u00edrastkov hmotnosti \u0161\u00edpky a po\u010d\u00edtan\u00edm zlyhan\u00ed oper\u00e1tori ur\u010dia hmotnos\u0165, ktor\u00e1 sp\u00f4sob\u00ed 50% miera zlyhania<\/strong>, ktor\u00fd predstavuje odolnos\u0165 materi\u00e1lu proti n\u00e1razu.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Sk\u00fa\u0161obn\u00e1 met\u00f3da A a sk\u00fa\u0161obn\u00e1 met\u00f3da B<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Norma ASTM D1709 obsahuje dve sk\u00fa\u0161obn\u00e9 met\u00f3dy:<\/p>

  • Met\u00f3da A pou\u017e\u00edva 38,10 mm<\/strong> hlava \u0161\u00edpky, spadnut\u00e1 z 0.66 m<\/strong>, ide\u00e1lne pre filmy, ktor\u00e9 si vy\u017eaduj\u00fa hmotnos\u0165 od 50 g a\u017e 6 kg<\/strong>.<\/li>
  • Met\u00f3da B pou\u017e\u00edva 50,80 mm<\/strong> hlava \u0161\u00edpky, spadnut\u00e1 z 1.52 m<\/strong>, vhodn\u00e9 pre filmy, ktor\u00e9 si vy\u017eaduj\u00fa 0,3 kg a\u017e 6 kg<\/strong>.<\/li><\/ul>

    Tieto dve met\u00f3dy poskytuj\u00fa v\u00fdsledky, ktor\u00e9 nemo\u017eno priamo porovn\u00e1va\u0165<\/strong> preto\u017ee ve\u013ekos\u0165 \u0161\u00edpky, v\u00fd\u0161ka p\u00e1du a energia n\u00e1razu sa l\u00ed\u0161ia.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Met\u00f3da schodiska<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Schodiskov\u00e1 met\u00f3da upravuje hmotnos\u0165 \u0161\u00edpky po ka\u017edom teste na z\u00e1klade v\u00fdsledku predch\u00e1dzaj\u00facej vzorky. T\u00e1to met\u00f3da je \u0161iroko pou\u017e\u00edvan\u00e1, preto\u017ee poskytuje spo\u013eahliv\u00fa \u0161tatistick\u00fa v\u00fdznamnos\u0165 pri men\u0161om po\u010dte vzoriek.<\/p>

    Alternat\u00edvna met\u00f3da zoskupovania<\/h3>

    Tu sa testuj\u00fa skupiny desiatich vzoriek pri jednej hmotnosti a hmotnos\u0165 sa medzi skupinami men\u00ed. T\u00e1to met\u00f3da sa st\u00e1va u\u017eito\u010dnou, ke\u010f je na podrobn\u00fa anal\u00fdzu potrebn\u00e9 \u0161irok\u00e9 rozlo\u017eenie por\u00fach.<\/p>

    \u00daloha testera n\u00e1razu pri p\u00e1de pri presnom hodnoten\u00ed filmu<\/h2>

    Spo\u013eahliv\u00fd tester n\u00e1razu pri p\u00e1de<\/strong> je nevyhnutn\u00fd na vykonanie sk\u00fa\u0161ky n\u00e1razom \u0161\u00edpky pod\u013ea noriem ASTM D1709 a ISO 7765. Presnos\u0165 v\u00fd\u0161ky p\u00e1du, geometrie \u0161\u00edpky, up\u00ednacieho tlaku a vyrovnania vzorky priamo ovplyv\u0148uje presnos\u0165 sk\u00fa\u0161ky.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Pre\u010do je d\u00f4le\u017eit\u00fd vysoko v\u00fdkonn\u00fd tester n\u00e1razu pri p\u00e1de<\/h3>
    • Zabezpe\u010duje opakovate\u013en\u00e9<\/strong> miesto dopadu<\/li>
    • Zabra\u0148uje sk\u013aznutiu v\u010faka stabiln\u00e9mu upnutiu<\/li>
    • Zachov\u00e1va presn\u00e9 tolerancie v\u00fd\u0161ky p\u00e1du<\/li>
    • Umo\u017e\u0148uje presn\u00fd pr\u00edrastok hmotnosti \u0161\u00edpky<\/li>
    • Zni\u017euje variabilitu oper\u00e1tora<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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      \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Pr\u00edru\u010dka\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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      Pre laborat\u00f3ri\u00e1 alebo v\u00fdrobcov, ktor\u00ed sa sna\u017eia o spo\u013eahliv\u00fa kontrolu kvality, je pou\u017eitie profesion\u00e1lneho r\u00e1zov\u00e9ho testera k\u013e\u00fa\u010dov\u00e9. Str\u00e1nka Cell Instruments Tester n\u00e1razov padaj\u00facich \u0161\u00edpok<\/strong> poskytuje automatick\u00e9 riadenie v\u00fd\u0161ky, presn\u00e9 up\u00ednanie a spo\u013eahliv\u00e9 syst\u00e9my uvo\u013e\u0148ovania \u0161\u00edpok, ktor\u00e9 umo\u017e\u0148uj\u00fa pou\u017e\u00edvate\u013eom dosahova\u0165 stabiln\u00e9 a opakovate\u013en\u00e9 v\u00fdsledky a z\u00e1rove\u0148 plne vyhovuj\u00fa po\u017eiadavk\u00e1m ASTM a ISO. Je obzvl\u00e1\u0161\u0165 cenn\u00fd pre v\u00fdrobn\u00e9 z\u00e1vody, ktor\u00e9 potrebuj\u00fa konzistentn\u00e9 vykazovanie a sledovate\u013en\u00e9 \u00fadaje o testovan\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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      Faktory ovplyv\u0148uj\u00face v\u00fdsledky n\u00e1razov\u00e9ho testu \u0161\u00edpok<\/h2>

      V\u00fdkonnos\u0165 \u0161\u00edpky pri n\u00e1raze ovplyv\u0148uje nieko\u013eko materi\u00e1lov\u00fdch a testovac\u00edch premenn\u00fdch:<\/p>

      • Hr\u00fabka f\u00f3lie:<\/strong> Odolnos\u0165 proti n\u00e1razu sa zvy\u0161uje, ale nie line\u00e1rne.<\/li>
      • Rovnomernos\u0165 vytl\u00e1\u010dania:<\/strong> Odch\u00fdlky meradla, l\u00ednie matrice a ne\u010distoty v\u00fdrazne ovplyv\u0148uj\u00fa v\u00fdsledky.<\/li>
      • Typ materi\u00e1lu:<\/strong> Polyetyl\u00e9n, nylon, kompozity EVOH, BOPP a viacvrstvov\u00e9 f\u00f3lie sa spr\u00e1vaj\u00fa odli\u0161ne.<\/li>

      • klimatiz\u00e1cia:<\/strong> Filmy musia by\u0165 kondicionovan\u00e9 na 23\u00b0C<\/strong> a 50% RH<\/strong> pred testovan\u00edm.<\/p><\/li><\/ul>

        Presn\u00e9 \u00fadaje si vy\u017eaduj\u00fa dodr\u017eiavanie postupov kondicionovania, spr\u00e1vnu kontrolu \u0161\u00edpok a pravideln\u00e9 overovanie upnutia, aby sa zabr\u00e1nilo sk\u013aznutiu vzorky.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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        Aplik\u00e1cie n\u00e1razovej sk\u00fa\u0161ky \u0161\u00edpkami v obalovom a materi\u00e1lovom priemysle<\/h2>

        Test n\u00e1razu \u0161\u00edpky je nevyhnutn\u00fd na:<\/p>

        • F\u00f3lie na balenie potrav\u00edn, ako s\u00fa PE, LLDPE a viacvrstvov\u00e9 vreck\u00e1<\/li>
        • Farmaceutick\u00e9 obalov\u00e9 f\u00f3lie a vreck\u00e1 na zdravotn\u00edcke pom\u00f4cky<\/li>
        • Po\u013enohospod\u00e1rske f\u00f3lie, vlo\u017eky a priemyseln\u00e9 rolky<\/li>
        • Pru\u017en\u00e9 lamin\u00e1ty vy\u017eaduj\u00face presn\u00e9 hodnotenie h\u00fa\u017eevnatosti<\/li>
        • Testovanie v\u00fdskumu a v\u00fdvoja nov\u00fdch filmov\u00fdch formul\u00e1ci\u00ed<\/li>
        • Kontrola vstupn\u00e9ho materi\u00e1lu pre spracovate\u013eov a spracovate\u013esk\u00e9 podniky<\/li><\/ul>

          V\u010faka pochopeniu odolnosti vo\u010di n\u00e1razu m\u00f4\u017eu v\u00fdrobcovia navrhova\u0165 f\u00f3lie s lep\u0161ou toleranciou vo\u010di p\u00e1du, zn\u00ed\u017eenou spotrebou materi\u00e1lu a optimalizovanou mechanickou rovnov\u00e1hou.<\/p>

          V\u00fdhody pou\u017e\u00edvania n\u00e1razov\u00e9ho testera Cell Instruments<\/h2>

          The Cell Instruments Tester n\u00e1razov padaj\u00facich \u0161\u00edpok<\/strong> podporuje:<\/p>

          • Automatick\u00e9 nastavenie v\u00fd\u0161ky p\u00e1du<\/li>
          • Vysokopevnostn\u00e9 up\u00ednanie vzoriek, ktor\u00e9 zabra\u0148uje sk\u013aznutiu<\/li>
          • Presne opracovan\u00e9 hlavy \u0161\u00edpok s kontrolovan\u00fdmi toleranciami<\/li>
          • Zabudovan\u00e9 bezpe\u010dnostn\u00e9 mechanizmy na ochranu obsluhy<\/li>

          • \u0160tatistick\u00e9 vykazovanie v s\u00falade s normami ASTM D1709 a ISO 7765<\/p><\/li><\/ul>

            V\u010faka robustnej kon\u0161trukcii a pokro\u010dil\u00fdm ovl\u00e1dac\u00edm prvkom je ide\u00e1lny pre laborat\u00f3ri\u00e1, ktor\u00e9 h\u013eadaj\u00fa presnos\u0165 a opakovate\u013enos\u0165.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

            Sprievodca sk\u00fa\u0161kou n\u00e1razom \u0161\u00edpky do plastov pod\u013ea met\u00f3dy ASTM D1709 Sk\u00fa\u0161ka n\u00e1razom \u0161\u00edpky do plastov\u00fdch f\u00f3li\u00ed a obalov\u00fdch materi\u00e1lov V\u00fdrobcovia plastov\u00fdch f\u00f3li\u00ed, spracovatelia a laborat\u00f3ri\u00e1 na kontrolu kvality pou\u017e\u00edvaj\u00fa sk\u00fa\u0161ku n\u00e1razom \u0161\u00edpky na hodnotenie odolnosti obalov\u00fdch materi\u00e1lov proti n\u00e1razu padaj\u00faceho projektilu. Ke\u010f\u017ee sa flexibiln\u00e9 obaly neust\u00e1le vyv\u00edjaj\u00fa, je nevyhnutn\u00e9 porozumie\u0165 tejto sk\u00fa\u0161ke a [...]<\/p>","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","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":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","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-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-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-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-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-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8173","post","type-post","status-publish","format-standard","hentry","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/posts\/8173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/comments?post=8173"}],"version-history":[{"count":0,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/posts\/8173\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/media?parent=8173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/categories?post=8173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.packqc.com\/sk\/wp-json\/wp\/v2\/tags?post=8173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}