mineral<\/a> tozunun uygun bir miktar\u0131n\u0131n eklenmesi, plastik filmin k\u0131z\u0131l\u00f6tesi \u0131\u015f\u0131nlara kar\u015f\u0131 direncini iyile\u015ftirebilir, b\u00f6ylece kul\u00fcbede geceleri k\u0131z\u0131l\u00f6tesi radyasyon \u015feklinde kul\u00fcbenin d\u0131\u015f\u0131na \u0131s\u0131 kayb\u0131n\u0131 azaltabilir ve seran\u0131n \u0131s\u0131 yal\u0131t\u0131m\u0131n\u0131n iyile\u015ftirilmesi.<\/p>\nHafif Sanayi Plastik \u0130\u015fleme ve Uygulama Ara\u015ft\u0131rma Enstit\u00fcs\u00fc’n\u00fcn 1990’lar\u0131n ba\u015f\u0131ndaki ara\u015ft\u0131rma sonu\u00e7lar\u0131 \u015funu g\u00f6steriyor:<\/p>\n
\u2460Mika tozu, kaolin, talk tozu ve hafif kalsiyum karbonat ayn\u0131 dolgu miktar\u0131na sahip oldu\u011funda (incelik ve y\u00fczey i\u015fleminde yak\u0131n), polietilen filmin mekanik \u00f6zellikleri birbirine yak\u0131nd\u0131r ve kaolin ve mika ile doldurulmu\u015f filmin mekanik \u00f6zellikleri pudra daha iyi biraz daha iyi.<\/p>\n
\u2461Silikon i\u00e7eren dolgularla doldurulmu\u015f LDPE filmin 7-25\u03bcm k\u0131z\u0131l\u00f6tesi \u00fczerindeki bariyer etkisi, Si-light kalsiyum karbonat i\u00e7ermeyen inorganik dolgu maddelerinden \u00f6nemli \u00f6l\u00e7\u00fcde daha iyidir, buna kar\u015f\u0131n mika tozu, kaolin ve talk\u0131n k\u0131z\u0131l\u00f6tesi bariyerleri benzerdir.<\/p>\n
\u2462 Si i\u00e7eren \u00fc\u00e7 dolgu maddesi aras\u0131nda, mika tozu ile doldurulmu\u015f LDPE filmin \u0131\u015f\u0131k ge\u00e7irgenli\u011fi en y\u00fcksektir ve saf LDPE plastik filminkine yak\u0131nd\u0131r, ard\u0131ndan kaolin ve talk gelir, ancak her ikisi de kalsiyum karbonat ile doldurulmu\u015f filmden daha y\u00fcksektir .<\/p>\n
Talk ucuz ve kullan\u0131m\u0131 kolay oldu\u011fundan, \u0131\u015f\u0131k ge\u00e7irgenli\u011fi ve k\u0131z\u0131l\u00f6tesi \u0131\u015f\u0131k bariyeri \u00f6zellikleri mika tozu ve kaolin kadar iyi olmasa da, \u0131s\u0131 yal\u0131t\u0131m\u0131n\u0131 iyile\u015ftirirken yine de daha iyi \u0131\u015f\u0131k ge\u00e7irgenli\u011fini koruyabilir. Bu nedenle tar\u0131msal plastik d\u00f6ken filmlerde kullan\u0131lm\u0131\u015ft\u0131r. Yayg\u0131n olarak kullan\u0131lmaktad\u0131r. \u015eu anda, tar\u0131msal film \u00fcretim tesisleri, farkl\u0131 film t\u00fcrlerine g\u00f6re (ya\u015flanmaya dayan\u0131kl\u0131 film, \u00e7ift ge\u00e7irmez film, \u00e7ok i\u015flevli film vb.) % 1-6 oran\u0131nda ultra ince talk pudras\u0131 kullanmaktad\u0131r.<\/p>\n
2) bir \u00e7ekirdekle\u015ftirici ajan olarak kullan\u0131n<\/strong><\/p>\nPolietilen (PE), polipropilen (PP), polietilen tereftalat (PET), poliamid (PA) vb. gibi kristalli polimerler, ergitmeden sonra so\u011futma ve \u015fekillendirme i\u015flemi s\u0131ras\u0131nda, baz\u0131 makromolek\u00fcller D\u00fczenlenir, buna kristalizasyon denir.<\/p>\n
Kristalizasyon sadece belirli bir s\u0131cakl\u0131k ve so\u011futma h\u0131z\u0131 gerektirmekle kalmaz, ayn\u0131 zamanda \u00f6nce kristal \u00e7ekirdeklerinin olu\u015fumunu, ard\u0131ndan kristal b\u00fcy\u00fcmesini gerektirir. \u00c7ekirdekle\u015ftirici ajan\u0131n iki ana i\u015flevi vard\u0131r. Biri, erimi\u015f polimerin so\u011futma i\u015flemi s\u0131ras\u0131nda daha h\u0131zl\u0131 kat\u0131la\u015fmas\u0131n\u0131 sa\u011flayan toplam kristalle\u015fme oran\u0131n\u0131 artt\u0131rmak, b\u00f6ylece enjeksiyonlu kal\u0131plama d\u00f6ng\u00fcs\u00fcn\u00fc k\u0131saltmak ve i\u015f verimlili\u011fini artt\u0131rmakt\u0131r; \u00c7ekme mukavemeti, \u0131s\u0131l bozulma s\u0131cakl\u0131\u011f\u0131 ve sertlik, \u00e7ekirdekle\u015ftirici ajan\u0131n etkisi alt\u0131nda geli\u015ftirilir, \u015feffafl\u0131k artar ve bulan\u0131kl\u0131k azal\u0131r.<\/p>\n
Talk tozu, PE veya PP i\u00e7in bir \u00e7ekirdekle\u015ftirici madde olarak kullan\u0131l\u0131r. Her \u015feyden \u00f6nce, par\u00e7ac\u0131klar\u0131n k\u00fc\u00e7\u00fck olmas\u0131 gerekir. Par\u00e7ac\u0131k boyutu ne kadar k\u00fc\u00e7\u00fck olursa, par\u00e7ac\u0131k say\u0131s\u0131 o kadar fazla olur, bu da daha fazla kristal merkezi anlam\u0131na gelir. Ayn\u0131 anda ne kadar \u00e7ok kristal b\u00fcy\u00fcrse, kristalin boyutu o kadar k\u00fc\u00e7\u00fck olur ve t\u00fcm malzemenin performans\u0131 o kadar iyi olur. Ayn\u0131 zamanda, ta\u015f tozunun erimi\u015f halde da\u011f\u0131lmas\u0131n\u0131n m\u00fcmk\u00fcn oldu\u011fu kadar eksiksiz olmas\u0131 ve aglomerasyon olgusunun m\u00fcmk\u00fcn oldu\u011fu kadar hafif olmas\u0131 da gereklidir.<\/p>\n
3) Ana dolgu maddesi olarak talk i\u00e7eren \u015feffaf dolgu masterbatch<\/strong><\/p>\nPlastik filmde kalsiyum karbonat kullan\u0131m\u0131 maliyeti d\u00fc\u015f\u00fcrebilse de, miktar b\u00fcy\u00fck oldu\u011funda filmin \u015feffafl\u0131\u011f\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde etkilenir ve baz\u0131 kullan\u0131c\u0131lar taraf\u0131ndan yanl\u0131\u015f anla\u015f\u0131lmalara neden olur. Bu duruma yan\u0131t olarak, \u015feffaf dolgu masterbatch, dolgu se\u00e7imi ve i\u015fleme teknolojisinde, PE filmin \u015feffafl\u0131\u011f\u0131n\u0131 b\u00fcy\u00fck \u00f6l\u00e7\u00fcde art\u0131ran \u00f6nemli iyile\u015ftirmeler yapt\u0131.<\/p>\n
<\/p>\n
Makale kayna\u011f\u0131: \u00c7in Toz A\u011f\u0131<\/p>\n","protected":false},"excerpt":{"rendered":"
Talk, plastikler i\u00e7in kalsiyum karbonattan sonra ikinci bir dolgu maddesidir ve plastiklerdeki uygulama say\u0131s\u0131 y\u0131lda 200.000 tondan fazlad\u0131r. Talkun baz\u0131 fiziksel ve kimyasal \u00f6zellikleri daha iyi anla\u015f\u0131ld\u0131\u011f\u0131ndan, uygulama kapsam\u0131 ve say\u0131s\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde artmaktad\u0131r.<\/p>\n","protected":false},"author":6,"featured_media":111079,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[830],"tags":[],"class_list":["post-112951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/112951","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/comments?post=112951"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/posts\/112951\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media\/111079"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/media?parent=112951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/categories?post=112951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/tr\/wp-json\/wp\/v2\/tags?post=112951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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