{"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\/cs\/dart-impact-test-guide-for-plastics-with-astm-d1709-methods\/","title":{"rendered":"R\u00e1zov\u00e1 zkou\u0161ka \u0161ipkami pro plastov\u00e9 f\u00f3lie a obalov\u00e9 materi\u00e1ly"},"content":{"rendered":"
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P\u0159\u00edru\u010dka pro r\u00e1zov\u00e9 zkou\u0161ky plast\u016f podle metod 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 zkou\u0161ka \u0161ipkami pro plastov\u00e9 f\u00f3lie a obalov\u00e9 materi\u00e1ly<\/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\u00fdrobci plastov\u00fdch f\u00f3li\u00ed, zpracovatel\u00e9 a laborato\u0159e pro kontrolu kvality vyu\u017e\u00edvaj\u00ed n\u00e1razov\u00e1 zkou\u0161ka \u0161ipkou<\/strong> vyhodnotit, jak dob\u0159e obalov\u00e9 materi\u00e1ly odol\u00e1vaj\u00ed n\u00e1razu padaj\u00edc\u00edho projektilu. Vzhledem k tomu, \u017ee se flexibiln\u00ed obaly neust\u00e1le vyv\u00edjej\u00ed, je pochopen\u00ed tohoto testu nezbytn\u00e9 pro zaji\u0161t\u011bn\u00ed trvanlivosti f\u00f3lie, prevenci po\u0161kozen\u00ed p\u0159i p\u0159eprav\u011b a spln\u011bn\u00ed glob\u00e1ln\u00edch regula\u010dn\u00edch o\u010dek\u00e1v\u00e1n\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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Porozum\u011bn\u00ed n\u00e1razov\u00e9mu testu \u0161ipek 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 zkou\u0161ka \u0161ipkou<\/strong> m\u011b\u0159\u00ed energii pot\u0159ebnou k po\u0161kozen\u00ed plastov\u00e9 f\u00f3lie, kdy\u017e na ni z pevn\u00e9 v\u00fd\u0161ky dopadne polokulovit\u00e1 \u0161ipka. Tato metoda hodnocen\u00ed pom\u00e1h\u00e1 p\u0159edpov\u00eddat skute\u010dn\u00e9 vlastnosti, v\u010detn\u011b selh\u00e1n\u00ed p\u0159i p\u00e1du p\u0159i p\u0159eprav\u011b, neporu\u0161enosti obalu p\u0159i manipulaci a celkov\u00e9 hou\u017eevnatosti tenkovrstv\u00fdch materi\u00e1l\u016f.<\/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\u00ed standardn\u00ed postupy, specifikuj\u00ed velikosti \u0161ipek, v\u00fd\u0161ky p\u00e1du, po\u017eadavky na kondicionov\u00e1n\u00ed a metody v\u00fdpo\u010dtu pro stanoven\u00ed energie selh\u00e1n\u00ed 50% (zn\u00e1m\u00e9 tak\u00e9 jako hmotnost p\u0159i selh\u00e1n\u00ed n\u00e1razu<\/strong>). Proto\u017ee tento test odr\u00e1\u017e\u00ed kombinovan\u00fd p\u0159\u00ednos slo\u017een\u00ed f\u00f3lie, kvality vytla\u010dov\u00e1n\u00ed a rovnom\u011brnosti tlou\u0161\u0165ky, je \u0161iroce pou\u017e\u00edv\u00e1n p\u0159i v\u00fdrob\u011b f\u00f3li\u00ed, balen\u00ed potravin, farmaceutick\u00fdch blistr\u016f a v mnoha aplikac\u00edch flexibiln\u00edch obal\u016f.<\/p>

V\u00fdrobci se na tuto zkou\u0161ku \u010dasto spol\u00e9haj\u00ed p\u0159i vytv\u00e1\u0159en\u00ed specifikac\u00ed, kvalifikaci nov\u00fdch materi\u00e1l\u016f a b\u011b\u017en\u00e9 kontrole kvality. Ve spojen\u00ed s vysoce p\u0159esn\u00fdm p\u0159\u00edstrojem, jako je nap\u0159. Cell Instruments Tester n\u00e1raz\u016f padaj\u00edc\u00edmi \u0161ipkami<\/em>, st\u00e1v\u00e1 se nepostradateln\u00fdm n\u00e1strojem pro minimalizaci rizik selh\u00e1n\u00ed materi\u00e1lu a zaji\u0161t\u011bn\u00ed konzistentn\u00edch mechanick\u00fdch vlastnost\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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Jak funguje n\u00e1razov\u00fd test \u0161ipek<\/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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P\u0159i zkou\u0161ce n\u00e1razem \u0161ipky se pou\u017e\u00edv\u00e1 voln\u011b padaj\u00edc\u00ed polokulovit\u00e1 \u0161ipka, kter\u00e1 svisle dopad\u00e1 na upnut\u00fd vzorek filmu. Film bu\u010f sel\u017ee, nebo n\u00e1raz vydr\u017e\u00ed. Regulov\u00e1n\u00edm p\u0159\u00edr\u016fstk\u016f hmotnosti \u0161ipky a po\u010d\u00edt\u00e1n\u00edm selh\u00e1n\u00ed oper\u00e1to\u0159i ur\u010duj\u00ed hmotnost, kter\u00e1 zp\u016fsob\u00ed selh\u00e1n\u00ed. 50% m\u00edra selh\u00e1n\u00ed<\/strong>, kter\u00e1 p\u0159edstavuje odolnost 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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Zku\u0161ebn\u00ed metoda A a zku\u0161ebn\u00ed metoda 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 dv\u011b zku\u0161ebn\u00ed metody:<\/p>

  • Metoda A pou\u017e\u00edv\u00e1 38,10 mm<\/strong> \u0161ipka, kter\u00e1 spadla z 0.66 m<\/strong>, ide\u00e1ln\u00ed pro filmy vy\u017eaduj\u00edc\u00ed hmotnost od 50 g a\u017e 6 kg<\/strong>.<\/li>
  • Metoda B pou\u017e\u00edv\u00e1 50,80 mm<\/strong> \u0161ipka, kter\u00e1 spadla z 1.52 m<\/strong>, vhodn\u00e9 pro filmy vy\u017eaduj\u00edc\u00ed 0,3 kg a\u017e 6 kg<\/strong>.<\/li><\/ul>

    Tyto dv\u011b metody poskytuj\u00ed v\u00fdsledky, kter\u00e9 nelze p\u0159\u00edmo porovn\u00e1vat<\/strong> proto\u017ee velikost \u0161ipky, v\u00fd\u0161ka p\u00e1du a energie n\u00e1razu se li\u0161\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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    Metoda schodi\u0161t\u011b<\/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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    Schodi\u0161\u0165ov\u00e1 metoda upravuje hmotnost \u0161ipky po ka\u017ed\u00e9m testu na z\u00e1klad\u011b v\u00fdsledku p\u0159edchoz\u00edho vzorku. Tato metoda je \u0161iroce pou\u017e\u00edv\u00e1na, proto\u017ee poskytuje spolehlivou statistickou v\u00fdznamnost p\u0159i men\u0161\u00edm po\u010dtu vzork\u016f.<\/p>

    Alternativn\u00ed metoda seskupov\u00e1n\u00ed<\/h3>

    Zde se testuj\u00ed skupiny deseti vzork\u016f s jednou hmotnost\u00ed a hmotnost se mezi skupinami m\u011bn\u00ed. Tato metoda se st\u00e1v\u00e1 u\u017eite\u010dnou, pokud je pro podrobnou anal\u00fdzu zapot\u0159eb\u00ed \u0161irok\u00e9 rozlo\u017een\u00ed poruch.<\/p>

    \u00daloha testeru n\u00e1razu p\u0159i p\u00e1du p\u0159i p\u0159esn\u00e9m hodnocen\u00ed filmu<\/h2>

    Spolehliv\u00fd tester n\u00e1razu p\u0159i p\u00e1du<\/strong> je nezbytn\u00fd pro proveden\u00ed n\u00e1razov\u00e9 zkou\u0161ky \u0161ipkou podle norem ASTM D1709 a ISO 7765. P\u0159esnost v\u00fd\u0161ky p\u00e1du, geometrie \u0161ipky, up\u00ednac\u00edho tlaku a vyrovn\u00e1n\u00ed vzorku p\u0159\u00edmo ovliv\u0148uje p\u0159esnost zkou\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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    Pro\u010d je d\u016fle\u017eit\u00fd vysoce v\u00fdkonn\u00fd tester n\u00e1razu p\u0159i p\u00e1du?<\/h3>
    • Zaji\u0161\u0165uje opakovateln\u00e9<\/strong> m\u00edsto dopadu<\/li>
    • Zabra\u0148uje prokluzov\u00e1n\u00ed d\u00edky stabiln\u00edmu upnut\u00ed<\/li>
    • Dodr\u017euje p\u0159esn\u00e9 tolerance v\u00fd\u0161ky p\u00e1du<\/li>
    • Umo\u017e\u0148uje p\u0159esn\u00fd p\u0159\u00edr\u016fstek hmotnosti \u0161ipky<\/li>
    • Sni\u017euje variabilitu obsluhy<\/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\"P\u0159\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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      Pro laborato\u0159e nebo v\u00fdrobce, kte\u0159\u00ed usiluj\u00ed o spolehlivou kontrolu kvality, je pou\u017eit\u00ed profesion\u00e1ln\u00edho r\u00e1zov\u00e9ho testeru z\u00e1sadn\u00ed. Na str\u00e1nk\u00e1ch Cell Instruments Tester n\u00e1raz\u016f padaj\u00edc\u00edmi \u0161ipkami<\/strong> poskytuje automatick\u00e9 \u0159\u00edzen\u00ed v\u00fd\u0161ky, p\u0159esn\u00e9 up\u00edn\u00e1n\u00ed a spolehliv\u00e9 syst\u00e9my uvol\u0148ov\u00e1n\u00ed \u0161ipek, kter\u00e9 u\u017eivatel\u016fm umo\u017e\u0148uj\u00ed dosahovat stabiln\u00edch a opakovateln\u00fdch v\u00fdsledk\u016f a z\u00e1rove\u0148 pln\u011b vyhovuj\u00ed po\u017eadavk\u016fm ASTM a ISO. Je obzvl\u00e1\u0161t\u011b cenn\u00fd pro v\u00fdrobn\u00ed z\u00e1vody, kter\u00e9 pot\u0159ebuj\u00ed konzistentn\u00ed v\u00fdkaznictv\u00ed a sledovateln\u00e9 \u00fadaje o zkou\u0161k\u00e1ch.<\/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 ovliv\u0148uj\u00edc\u00ed v\u00fdsledky n\u00e1razov\u00fdch zkou\u0161ek \u0161ipek<\/h2>

      V\u00fdkonnost \u0161ipky p\u0159i n\u00e1razu ovliv\u0148uje n\u011bkolik prom\u011bnn\u00fdch t\u00fdkaj\u00edc\u00edch se materi\u00e1lu a testov\u00e1n\u00ed:<\/p>

      • Tlou\u0161\u0165ka f\u00f3lie:<\/strong> Odolnost proti n\u00e1razu se zvy\u0161uje, ale nen\u00ed line\u00e1rn\u00ed.<\/li>
      • Rovnom\u011brnost vytla\u010dov\u00e1n\u00ed:<\/strong> V\u00fdsledky v\u00fdrazn\u011b ovliv\u0148uj\u00ed odchylky m\u011b\u0159idla, linie matrice a ne\u010distoty.<\/li>
      • Typ materi\u00e1lu:<\/strong> Polyethylen, nylon, kompozity EVOH, BOPP a v\u00edcevrstv\u00e9 f\u00f3lie se chovaj\u00ed odli\u0161n\u011b.<\/li>

      • klimatizace:<\/strong> Filmy mus\u00ed b\u00fdt kondicionov\u00e1ny na 23\u00b0C<\/strong> a 50% RH<\/strong> p\u0159ed testov\u00e1n\u00edm.<\/p><\/li><\/ul>

        P\u0159esn\u00e9 \u00fadaje vy\u017eaduj\u00ed dodr\u017eov\u00e1n\u00ed postup\u016f kondicionov\u00e1n\u00ed, \u0159\u00e1dnou kontrolu \u0161ipek a pravideln\u00e9 ov\u011b\u0159ov\u00e1n\u00ed upnut\u00ed, aby se zabr\u00e1nilo sklouznut\u00ed vzorku.<\/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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        Aplikace \u0161ipkov\u00e9 r\u00e1zov\u00e9 zkou\u0161ky v obalov\u00e9m a materi\u00e1lov\u00e9m pr\u016fmyslu<\/h2>

        Zkou\u0161ka n\u00e1razem \u0161ipky je nezbytn\u00e1 pro:<\/p>

        • Potravin\u00e1\u0159sk\u00e9 f\u00f3lie, jako jsou PE, LLDPE a v\u00edcevrstv\u00e9 s\u00e1\u010dky.<\/li>
        • Farmaceutick\u00e9 obalov\u00e9 f\u00f3lie a s\u00e1\u010dky na zdravotnick\u00e9 prost\u0159edky<\/li>
        • Zem\u011bd\u011blsk\u00e9 f\u00f3lie, vlo\u017eky a pr\u016fmyslov\u00e9 role<\/li>
        • Pru\u017en\u00e9 lamin\u00e1ty vy\u017eaduj\u00edc\u00ed p\u0159esn\u00e9 hodnocen\u00ed hou\u017eevnatosti<\/li>
        • Testov\u00e1n\u00ed v\u00fdzkumu a v\u00fdvoje nov\u00fdch filmov\u00fdch formulac\u00ed<\/li>
        • Kontrola p\u0159\u00edchoz\u00edho materi\u00e1lu pro zpracovatele a zpracovatelsk\u00e9 podniky<\/li><\/ul>

          D\u00edky pochopen\u00ed odolnosti proti n\u00e1razu mohou v\u00fdrobci navrhovat f\u00f3lie s lep\u0161\u00ed odolnost\u00ed proti p\u00e1du, ni\u017e\u0161\u00ed spot\u0159ebou materi\u00e1lu a optimalizovanou mechanickou rovnov\u00e1hou.<\/p>

          V\u00fdhody pou\u017e\u00edv\u00e1n\u00ed n\u00e1razov\u00e9ho testeru padaj\u00edc\u00edch \u0161ipek Cell Instruments<\/h2>

          The Cell Instruments Tester n\u00e1raz\u016f padaj\u00edc\u00edmi \u0161ipkami<\/strong> podporuje:<\/p>

          • Automatizovan\u00e9 polohov\u00e1n\u00ed v\u00fd\u0161ky p\u00e1du<\/li>
          • Vysoce pevn\u00e9 up\u00edn\u00e1n\u00ed vzork\u016f zabra\u0148uj\u00edc\u00ed prokluzov\u00e1n\u00ed<\/li>
          • P\u0159esn\u011b opracovan\u00e9 hlavy \u0161ipek s kontrolovan\u00fdmi tolerancemi<\/li>
          • Vestav\u011bn\u00e9 bezpe\u010dnostn\u00ed mechanismy pro ochranu obsluhy<\/li>

          • Statistick\u00e9 vykazov\u00e1n\u00ed v souladu s normami ASTM D1709 a ISO 7765<\/p><\/li><\/ul>

            D\u00edky robustn\u00ed konstrukci a pokro\u010dil\u00e9mu ovl\u00e1d\u00e1n\u00ed je ide\u00e1ln\u00ed pro laborato\u0159e, kter\u00e9 hledaj\u00ed p\u0159esnost a opakovatelnost.<\/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":"

            Pr\u016fvodce zkou\u0161kou n\u00e1razu \u0161ipky do plast\u016f podle metody ASTM D1709 Zkou\u0161ka n\u00e1razu \u0161ipky do plastov\u00fdch f\u00f3li\u00ed a obalov\u00fdch materi\u00e1l\u016f V\u00fdrobci plastov\u00fdch f\u00f3li\u00ed, zpracovatel\u00e9 a laborato\u0159e pro kontrolu kvality pou\u017e\u00edvaj\u00ed zkou\u0161ku n\u00e1razu \u0161ipky do plast\u016f k posouzen\u00ed, jak dob\u0159e obalov\u00e9 materi\u00e1ly odol\u00e1vaj\u00ed n\u00e1razu padaj\u00edc\u00edho projektilu. Vzhledem k tomu, \u017ee se flexibiln\u00ed obaly neust\u00e1le vyv\u00edjej\u00ed, je pochopen\u00ed t\u00e9to zkou\u0161ky nezbytn\u00e9 pro [...]<\/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\/cs\/wp-json\/wp\/v2\/posts\/8173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/comments?post=8173"}],"version-history":[{"count":0,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/posts\/8173\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/media?parent=8173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/categories?post=8173"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.packqc.com\/cs\/wp-json\/wp\/v2\/tags?post=8173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}