{"id":15687,"date":"2024-09-18T09:07:57","date_gmt":"2024-09-18T07:07:57","guid":{"rendered":"https:\/\/dev.shimadzu-testing.com\/?p=15687"},"modified":"2025-02-05T11:33:23","modified_gmt":"2025-02-05T10:33:23","slug":"3-point-flexural-test-of-cellulose-nanofibersreinforced-plastics","status":"publish","type":"post","link":"https:\/\/shimadzu-testing.com\/sk\/vediet-ako\/bending-testing\/3-point-flexural-test-of-cellulose-nanofibersreinforced-plastics\/","title":{"rendered":"3-bodov\u00e1 sk\u00fa\u0161ka ohybnosti plastov vystu\u017een\u00fdch celul\u00f3zov\u00fdmi nanovl\u00e1knami"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"15687\" class=\"elementor elementor-15687\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4e15197 e-flex e-con-boxed e-con e-parent\" data-id=\"4e15197\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a8c5eeb elementor-widget elementor-widget-text-editor\" data-id=\"a8c5eeb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>\u00davod<\/strong><\/h2>\n<p>Plastov\u00e1 pena je \u013eahk\u00e1 a m\u00e1 vynikaj\u00face tepeln\u00e9 vlastnosti\nizola\u010dn\u00e9 a tlmiace vlastnosti, preto\u017ee\nVn\u00fatro materi\u00e1lu obsahuje mno\u017estvo dut\u00edn. Na\nna druhej strane je pevnos\u0165 plastovej peny ni\u017e\u0161ia ako pevnos\u0165\nako nepenov\u00fdch materi\u00e1lov, preto\u017ee objem plastov na jednotku\nobjemu je men\u0161\u00ed. Pridanie vl\u00e1kien alebo in\u00fdch v\u00fdstu\u017e\u00ed\nmateri\u00e1lov je jednou z techn\u00edk na dosiahnutie uspokojiv\u00e9ho\npevnosti v materi\u00e1loch, v ktor\u00fdch sa na dodanie pevnosti pou\u017e\u00edva penenie.\nn\u00edzku hmotnos\u0165 a tepelnoizola\u010dn\u00e9 vlastnosti. Hoci\nsklenen\u00e9 a uhl\u00edkov\u00e9 vl\u00e1kna sa \u010dasto pou\u017e\u00edvaj\u00fa ako v\u00fdstu\u017e\nmateri\u00e1ly, v\u00fdskum a v\u00fdvoj s pou\u017eit\u00edm celul\u00f3zy\nnanovl\u00e1kien (\u010falej len \"CNF\") ako vysoko odoln\u00fdch materi\u00e1lov rastlinn\u00e9ho p\u00f4vodu.\nv poslednom \u010dase pokro\u010dil.\nCelul\u00f3za, ktor\u00e1 sa sklad\u00e1 najm\u00e4 z l\u00e1tok, ako s\u00fa napr.\nbunkov\u00e9 steny a bavlna, je najbe\u017enej\u0161ou\nsacharid na Zemi a u\u017e dlho sa pou\u017e\u00edva ako surovina\nmateri\u00e1l na v\u00fdrobu papiera a bavlnen\u00fdch vl\u00e1kien. V poslednom \u010dase sa CNF s\nvy\u0161\u0161ou funk\u010dnos\u0165ou realizovanou defibr\u00e1ciou celul\u00f3zy na\nna nano\u00farovni, vzbudila z\u00e1ujem. Ako vl\u00e1knina rastlinn\u00e9ho p\u00f4vodu\nm\u00e1 CNF n\u00edzky vplyv na \u017eivotn\u00e9 prostredie a tie\u017e\nm\u00e1 cel\u00fd rad \u017eiaducich vlastnost\u00ed, vr\u00e1tane n\u00edzkej\nline\u00e1rnu roz\u0165a\u017enos\u0165, bari\u00e9rov\u00fa vlastnos\u0165 vo\u010di plynom a\ntransparentnos\u0165. V porovnan\u00ed so \u017eelezn\u00fdmi materi\u00e1lmi,\nCNF v\u00e1\u017ei len 1\/5 hmotnosti, ale m\u00e1 vysok\u00fa \u0161pecifick\u00fa hmotnos\u0165\npevnos\u0165, ktor\u00e1 je 5-kr\u00e1t pevnej\u0161ia ako oce\u013e, a\npevnos\u0165 rovnak\u00fa alebo vy\u0161\u0161iu ako pevnos\u0165 be\u017en\u00fdch\nmateri\u00e1ly mo\u017eno realizova\u0165 zmie\u0161an\u00edm CNF s\nplastov a gumy. Preto CNF pri\u0165ahuje\nako nov\u00fd materi\u00e1l po uhl\u00edkov\u00fdch vl\u00e1knach.\nV tomto \u010dl\u00e1nku sa uv\u00e1dza trojbodov\u00e1 sk\u00fa\u0161ka ohybom s pou\u017eit\u00edm\nzariadenia na meranie priehybu a sk\u00fa\u0161obnej r\u00fdchlosti v\nv s\u00falade s normou JIS K 7171, ktor\u00e1 sa v\u0161eobecne pou\u017e\u00edva v\npevnostn\u00e9 hodnotenie plastov, a porovn\u00e1va\nrozdiely v pevnosti v ohybe s\/bez CNF a\ns napenen\u00edm\/bez napenenia.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-efdf405 elementor-widget elementor-widget-text-editor\" data-id=\"efdf405\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Vzorky<\/strong><\/h2>\n<p>polyetyl\u00e9n s vysokou hustotou (\u010falej len HDPE). Sk\u00fa\u0161obn\u00e9 vzorky *1 boli pripraven\u00e9 pridan\u00edm 5 % CNF do HDPE ako matricov\u00e9ho plastu. Na sk\u00famanie rozdielov vo vn\u00fatornom stave sa pred sk\u00fa\u0161kami vykonalo vn\u00fatorn\u00e9 pozorovanie vzoriek pomocou r\u00f6ntgenov\u00e9ho syst\u00e9mu inspeXio SMX- 100CT s mikroohniskom. Na obr. 1 s\u00fa zobrazen\u00e9 CT sn\u00edmky vzoriek, na ktor\u00fdch sa dutiny zobrazuj\u00fa ako \u010dierne plochy. Medzi nepenen\u00fdm plastom bez CNF (\u2460) a nepenen\u00fdm plastom vystu\u017een\u00fdm CNF ( \u2461) nie je ve\u013ek\u00fd rozdiel. V napenen\u00fdch plastoch sa zistilo, \u017ee v plaste vystu\u017eenom CNF (\u2463) existuj\u00fa jemnej\u0161ie dutiny v rovnomerne rozpt\u00fdlenom stave ako v plaste bez CNF. Preto je mo\u017en\u00e9 predpoklada\u0165, \u017ee CNF br\u00e1ni rastu a koalescencii dut\u00edn. \n<br> <br>\n*1 Vzorky poskytol Kj\u00f3tsky mestsk\u00fd in\u0161tit\u00fat priemyseln\u00fdch technol\u00f3gi\u00ed a kult\u00fary, miestna administrat\u00edvna agent\u00fara.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0b2331 elementor-widget elementor-widget-text-editor\" data-id=\"e0b2331\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>Merac\u00ed syst\u00e9m<\/strong><\/h2>\n<p>Na obr. 2 je zn\u00e1zornen\u00fd stav testu a v tabu\u013eke 1\nuv\u00e1dza podmienky sk\u00fa\u0161ky. Po meran\u00ed ohybu\nmodulu pru\u017enosti sa sk\u00fa\u0161obn\u00e1 r\u00fdchlos\u0165 zmenila na\naby bolo mo\u017en\u00e9 \u00fa\u010dinne mera\u0165 pevnos\u0165 v ohybe. Pre\npresn\u00e9 meranie priehybu\nvzoriek sa sk\u00fa\u0161ka vykonala pomocou\ndeflektometra pri meran\u00ed posunutia.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-413e636 e-grid e-con-full e-con e-child\" data-id=\"413e636\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2206f5f elementor-widget elementor-widget-image\" data-id=\"2206f5f\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-fig2-condition-of-test.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-fig2-condition-of-test\" data-elementor-lightbox-description=\"Fig. 2 Condition of Test\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU2NTUsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcLzMtcG9pbnQtZmxleHVyYWwtdGVzdC1vZi1jZWxsdWxvc2UtbmFub2ZpYmVycy1yZWluZm9yY2VkLXBsYXN0aWNzLWZpZzItY29uZGl0aW9uLW9mLXRlc3QuanBnIn0%3D\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"484\" height=\"440\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-fig2-condition-of-test.jpg\" class=\"attachment-medium_large size-medium_large wp-image-15655\" alt=\"Obr. 2 Podmienky sk\u00fa\u0161ky\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr. 2 Podmienky sk\u00fa\u0161ky<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f029c7 elementor-widget elementor-widget-image\" data-id=\"7f029c7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-table-1-test-conditions.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-table-1-test-conditions\" data-elementor-lightbox-description=\"Table 1 Test Conditions\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU2NTcsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcLzMtcG9pbnQtZmxleHVyYWwtdGVzdC1vZi1jZWxsdWxvc2UtbmFub2ZpYmVycy1yZWluZm9yY2VkLXBsYXN0aWNzLXRhYmxlLTEtdGVzdC1jb25kaXRpb25zLmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"363\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-table-1-test-conditions-768x363.jpg\" class=\"attachment-medium_large size-medium_large wp-image-15657\" alt=\"Tabu\u013eka 1 Testovacie podmienky\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Tabu\u013eka 1 Testovacie podmienky<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\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\t\t<div class=\"elementor-element elementor-element-386b200 elementor-widget elementor-widget-text-editor\" data-id=\"386b200\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2><strong>V\u00fdsledky testov<\/strong><\/h2>\n<p>Na obr. 3 s\u00fa uveden\u00e9 v\u00fdsledky testov. S vystu\u017eenou CNF\n(\u2461, \u2463) do\u0161lo ku krehk\u00e9mu poru\u0161eniu, ako je vidie\u0165\npod\u013ea prudk\u00e9ho poklesu sk\u00fa\u0161obnej sily po dosiahnut\u00ed\nmaxim\u00e1lnej pevnosti. Plasty bez CNF ( \u2460 , \u2462 )\nvykazovali tv\u00e1rne spr\u00e1vanie, pri ktorom sk\u00fa\u0161obn\u00e1 sila\npostupne klesala.\nV tabu\u013eke 2 s\u00fa zhrnut\u00e9 v\u00fdsledky sk\u00fa\u0161ok v\u0161etk\u00fdch vzoriek.\nModul pru\u017enosti v ohybe bol vypo\u010d\u00edtan\u00fd z\nsklonu ohybovej deform\u00e1cie od 0,05 % do 0,25 %.\nPorovnanie hodn\u00f4t HDPE bez CNF (\u2460, \u2462)\na plastu vystu\u017een\u00e9ho CNF ( \u2461 , \u2463 ), CNF\nvyk\u00e1zali vy\u0161\u0161ie hodnoty pre oba plasty vystu\u017een\u00e9 CNF\nmodulu pru\u017enosti v ohybe aj pevnosti v ohybe.\nOkrem toho porovnan\u00edm varia\u010dn\u00fdch koeficientov\npevnosti v ohybe plastovej peny HDPE (\u2462 ) a plastovej peny HDPE (\u2462 ).\nplastovej peny vystu\u017eenej CNF (\u2463) sa zistilo, \u017ee\nodch\u00fdlky plastu vystu\u017een\u00e9ho CNF boli men\u0161ie.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2e696ce e-grid e-con-full e-con e-child\" data-id=\"2e696ce\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5b38999 elementor-widget elementor-widget-image\" data-id=\"5b38999\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-fig3-test-results.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-fig3-test-results\" data-elementor-lightbox-description=\"Fig. 3 Test Results\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU2NTYsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcLzMtcG9pbnQtZmxleHVyYWwtdGVzdC1vZi1jZWxsdWxvc2UtbmFub2ZpYmVycy1yZWluZm9yY2VkLXBsYXN0aWNzLWZpZzMtdGVzdC1yZXN1bHRzLmpwZyJ9\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"768\" height=\"491\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-fig3-test-results-768x491.jpg\" class=\"attachment-medium_large size-medium_large wp-image-15656\" alt=\"Obr. 3 V\u00fdsledky testu\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr. 3 V\u00fdsledky testu<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-21447e8 elementor-widget elementor-widget-image\" data-id=\"21447e8\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-table-2-summary-of-test-results-average-of-n-3.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-table-2-summary-of-test-results-average-of-n-3\" data-elementor-lightbox-description=\"Table 2 Summary of Test Results (Average of n=3)\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6MTU2NTgsInVybCI6Imh0dHBzOlwvXC9zaGltYWR6dS10ZXN0aW5nLmNvbVwvd3AtY29udGVudFwvdXBsb2Fkc1wvMjAyNFwvMDlcLzMtcG9pbnQtZmxleHVyYWwtdGVzdC1vZi1jZWxsdWxvc2UtbmFub2ZpYmVycy1yZWluZm9yY2VkLXBsYXN0aWNzLXRhYmxlLTItc3VtbWFyeS1vZi10ZXN0LXJlc3VsdHMtYXZlcmFnZS1vZi1uLTMuanBnIn0%3D\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"305\" src=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics-table-2-summary-of-test-results-average-of-n-3-768x305.jpg\" class=\"attachment-medium_large size-medium_large wp-image-15658\" alt=\"Tabu\u013eka 2 S\u00fahrn v\u00fdsledkov testov (priemer n=3)\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Tabu\u013eka 2 S\u00fahrn v\u00fdsledkov testov (priemer n=3)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\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\t\t<div class=\"elementor-element elementor-element-1768880 elementor-widget elementor-widget-text-editor\" data-id=\"1768880\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Z\u00e1ver<\/h2>\n<ul>\nBolo mo\u017en\u00e9 zv\u00fd\u0161i\u0165 modul pru\u017enosti v ohybe\npru\u017enosti a pevnosti v ohybe plastu pridan\u00edm CNF.\nOkrem zlep\u0161enia t\u00fdchto vlastnost\u00ed sa v pr\u00edpade\nplastovej peny sa tie\u017e zistilo, \u017ee stabiln\u00fd plast\npeny, napr\u00edklad bez odch\u00fdlok v dutin\u00e1ch\nje mo\u017en\u00e9 pridan\u00edm CNF.\nHoci s\u00fa potrebn\u00e9 r\u00f4zne typy hodnotenia pre\naplik\u00e1ciu kompozitn\u00fdch materi\u00e1lov CNF na pr\u00faty,\nhodnotenie pevnosti je jednou z k\u013e\u00fa\u010dov\u00fdch polo\u017eiek. V tejto \u0161t\u00fadii sa\npriehyb vzoriek mohol by\u0165 meran\u00fd pomocou\nvysokou presnos\u0165ou, preto\u017ee sa pou\u017eil deflektometer.\nPresn\u00e9 vyhodnotenie mechanick\u00fdch vlastnost\u00ed\nmateri\u00e1lov obsahuj\u00facich CNF je mo\u017en\u00e9 pomocou\nmerac\u00edch syst\u00e9mov Shimadzu.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49c6ec6 elementor-widget elementor-widget-spacer\" data-id=\"49c6ec6\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\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<div class=\"elementor-element elementor-element-167ca2b e-flex e-con-boxed e-con e-parent\" data-id=\"167ca2b\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2bb8546 elementor-widget elementor-widget-heading\" data-id=\"2bb8546\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Stiahnite si<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-951c335 downloads-liste elementor-widget elementor-widget-text-editor\" data-id=\"951c335\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><div class=\"page\" title=\"Strana 1\"><div class=\"section\"><div class=\"layoutArea\"><div class=\"column\"><p><a href=\"https:\/\/shimadzu-testing.com\/wp-content\/uploads\/2024\/09\/3-point-flexural-test-of-cellulose-nanofibers-reinforced-plastics.pdf\">Pou\u017eitie: Trojbodov\u00e1 sk\u00fa\u0161ka ohybu plastov vystu\u017een\u00fdch celul\u00f3zov\u00fdmi nanovl\u00e1knamiTrojbodov\u00e1 sk\u00fa\u0161ka ohybu plastov<\/a><\/p><\/div><\/div><\/div><\/div><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c26eafc elementor-widget elementor-widget-spacer\" data-id=\"c26eafc\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\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":"<p>Plastic foam is lightweight and has excellent thermal<br \/>\ninsulating and shock-absorbing properties because the<br \/>\ninterior of the material contains numerous voids. On the<br \/>\nother hand&#8230;<\/p>","protected":false},"author":5,"featured_media":15654,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[347,336],"tags":[],"class_list":["post-15687","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ags-x","category-bending-testing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>3-Point Flexural Test of CNF-Reinforced Plastics | Shimadzu<\/title>\n<meta name=\"description\" content=\"Explore Shimadzu&#039;s methodology for 3-point flexural testing of cellulose nanofiber-reinforced plastics to assess bending strength and flexural modulus.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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