{"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":"

            Dart Impact Test Guide for Plastics with ASTM D1709 Methods Dart Impact Test for Plastic Films and Packaging Materials Plastic film manufacturers, converters, and quality inspection laboratories use the dart impact test to evaluate how well packaging materials resist impact from a falling projectile. As flexible packaging continues to evolve, understanding this test is essential […]<\/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}]}}