{"id":5407,"date":"2022-10-16T20:04:11","date_gmt":"2022-10-17T04:04:11","guid":{"rendered":"https:\/\/zetarmoulding.com\/?p=5407"},"modified":"2022-10-16T22:37:04","modified_gmt":"2022-10-17T06:37:04","slug":"epdm-rubber-automotive-rubber-products","status":"publish","type":"post","link":"https:\/\/zetarmoulding.com\/tr\/epdm-kaucuk-otomoti%cc%87v-kaucuk-urunleri%cc%87\/","title":{"rendered":"Otomotiv kau\u00e7uk \u00fcr\u00fcnlerinde EPDM kau\u00e7uk uygulamas\u0131"},"content":{"rendered":"

EPDM (EPDM kau\u00e7uk), iyi elastikiyet, a\u015f\u0131nma direnci, \u0131s\u0131 direnci, hava direnci, ozon direnci, tatl\u0131 su ve deniz suyu direncine sahip sentetik kau\u00e7uk olarak, kap\u0131 ve pencere contalar\u0131, hidrolik fren hortumlar\u0131 ve contalar\u0131, klima havaland\u0131rma kanallar\u0131, motor so\u011futma sistemlerindeki contalar ve klima so\u011futma sistemleri, so\u011futma s\u0131v\u0131s\u0131 ta\u015f\u0131ma hortumlar\u0131 vb. gibi otomotiv kau\u00e7uk \u00fcr\u00fcnlerinde yayg\u0131n olarak kullan\u0131lmaktad\u0131r.<\/strong><\/p>\n\n\n\n

EPDM kau\u00e7uk<\/a> polar olmayan, doymu\u015f bir yap\u0131d\u0131r. \"Polar olmayan\" olarak adland\u0131r\u0131lan, yani polimeri olu\u015fturan molek\u00fcllerin i\u00e7inde polar gruplar bulunmaz.<\/p>\n\n\n\n

\"Doymu\u015f\" olarak adland\u0131r\u0131lan, yani polimerin bile\u015fimi molek\u00fcl i\u00e7inde \u00e7ift ba\u011f i\u00e7ermez. Genel olarak, kau\u00e7uk ve termoplastik elastomerler \"polar\" ve \"polar olmayan\" ve \"doymu\u015f\" ve \"doymam\u0131\u015f\" \u00e7e\u015fitli yap\u0131lara ayr\u0131labilir.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

Molek\u00fcllerinin kendileri polar gruplar i\u00e7eren malzemeler genellikle \"polar\" malzemelerdir. \"Polar\" yap\u0131, genellikle benzer \u00e7\u00f6z\u00fcn\u00fcrl\u00fck ilkesini izleyerek polimerlerin \u00e7\u00f6z\u00fcc\u00fclere kar\u015f\u0131 direncini belirler, yani polar \u00e7\u00f6z\u00fcc\u00fcler polar polimerleri \u00e7\u00f6zer veya \u015fi\u015firir ve bunun tersi de ge\u00e7erlidir.<\/p>\n\n\n\n

\"Doymu\u015f\" yap\u0131, polimerlerin atmosferik ya\u015flanmaya (oksidasyon) kar\u015f\u0131 direnci ile ilgilidir. Polimer molek\u00fcl\u00fc bir \u00e7ift ba\u011f i\u00e7eriyorsa, \u00e7ift ba\u011f kolayca oksitlendi\u011finden, polimer karars\u0131zd\u0131r ve bozunmas\u0131 kolayd\u0131r.<\/p>\n\n\n\n

Yani \"polar olmayan\" EPDM, s\u0131cak su ve buhar, deterjanlar, organik ve inorganik asitler, polar \u00e7\u00f6z\u00fcc\u00fcler (etanol, aseton, esterler vb.), glikol bazl\u0131 fren s\u0131v\u0131s\u0131 vb. gibi polar ortamlara dayan\u0131kl\u0131d\u0131r.<\/p>\n\n\n\n

Ve mineral ya\u011f, benzin, hayvansal ve bitkisel ya\u011flar ve ya\u011flar, silikon ya\u011f\u0131 vb. gibi polar olmayan ortamlara dayan\u0131kl\u0131 de\u011fildir ve glikol bazl\u0131 fren hidroli\u011fi (SL-DOT4) sistemlerinde, antifriz i\u00e7eren motor so\u011futma sistemlerinde yayg\u0131n olarak kullan\u0131l\u0131r; \"doymu\u015f\" EPDM olarak, ozon ve hava ko\u015fullar\u0131na kar\u015f\u0131 m\u00fckemmel diren\u00e7le, hava, su vb. \u00fcretiminde yayg\u0131n olarak kullan\u0131l\u0131r. <\/p>\n\n\n\n

Otomotivde EPDM kullan\u0131m s\u0131cakl\u0131\u011f\u0131 genellikle -40 \u2103 ila 120 \u2103 aras\u0131ndad\u0131r. A\u015fa\u011f\u0131da EPDM kullan\u0131m\u0131na \u00f6zel bir giri\u015f yer almaktad\u0131r EPDM \u00fcr\u00fcnleri<\/a> ve bunlara kar\u015f\u0131l\u0131k gelen malzeme performans gereksinimleri ve yayg\u0131n ar\u0131za durumlar\u0131n\u0131n analizi.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

Otomotiv s\u0131zd\u0131rmazl\u0131k \u00fcr\u00fcnlerinde uygulama<\/mark><\/h2>\n\n\n\n

Otomotiv contalar\u0131n\u0131n b\u00fcy\u00fck \u00e7o\u011funlu\u011fu tutarl\u0131 kesitli ve sonsuz uzunlukta (kullan\u0131ld\u0131\u011f\u0131nda, gerekli uzunlu\u011fa g\u00f6re kesilmi\u015f) ekstr\u00fczyon ekipman\u0131 ile \u00fcretilirken, az say\u0131da d\u00fczensiz \u00fcr\u00fcn vulkanizasyon kal\u0131plar\u0131 ile \u00fcretilmektedir.<\/p>\n\n\n\n

Ekstr\u00fcde \u00fcr\u00fcnlerin s\u00fcreci a\u015fa\u011f\u0131daki gibidir: bile\u015fenler \u2192 kau\u00e7uk kar\u0131\u015ft\u0131rma \u2192 \u00e7oklu malzemeler (\u015funlar\u0131 i\u00e7erebilir: sert kau\u00e7uk, yumu\u015fak kau\u00e7uk, s\u00fcnger kau\u00e7uk, renkli kau\u00e7uk, metal iskelet, takviye teli, vb.)<\/p>\n\n\n\n

Bile\u015fik ekstr\u00fczyon \u2192 \u0131s\u0131tma vulkanizasyonu (belki: s\u0131cak hava vulkanizasyonu, vulkanizasyon tank\u0131 vulkanizasyonu, mikrodalga vulkanizasyonu, cam boncuk kaynatma yata\u011f\u0131 vulkanizasyonu, tuz banyosu vulkanizasyonu, vb. \u2192 i\u015flem sonras\u0131 (kesme, vulkanizasyon derzi, elektrostatik floklama, y\u00fczey ta\u015fk\u0131n kaplama, yap\u0131\u015ft\u0131rma, vb.<\/p>\n\n\n\n

\u00d6n ve arka \u00f6n camlarda, kap\u0131larda, pencerelerde, motor b\u00f6lmesinde, bagajda ve arac\u0131n di\u011fer k\u0131s\u0131mlar\u0131nda yayg\u0131n olarak kullan\u0131l\u0131r, \u015fok emilimi, su ge\u00e7irmez, toz ge\u00e7irmez, ses yal\u0131t\u0131m\u0131, dekorasyon, s\u00fcr\u00fcc\u00fclerin ve yolcular\u0131n korunmas\u0131 ve di\u011fer i\u015flevlerle g\u00f6vde par\u00e7alar\u0131 aras\u0131ndaki bo\u015flu\u011fu doldurmak i\u00e7in kullan\u0131l\u0131r.<\/p>\n\n\n\n

B\u00f6yle silikon kau\u00e7uk \u00fcr\u00fcnler<\/a> esas olarak g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131, su ve ozon ile temas halindedir, -40 \u2103 ~ 100 \u2103 s\u0131cakl\u0131klarda kullan\u0131l\u0131r, k\u0131sa s\u00fcreli \u0131s\u0131ya dayan\u0131kl\u0131 s\u0131cakl\u0131k 125 \u2103'ye ula\u015fabilir.<\/p>\n\n\n\n

Kau\u00e7uk s\u0131zd\u0131rmazl\u0131k \u015feridi i\u00e7in kullan\u0131lan EPDM malzemesi genel sertlik (Shore A) 40 ~ 90 aras\u0131nda se\u00e7im; \u00e7ekme mukavemeti 7MPa'dan fazla olmal\u0131d\u0131r; kopma uzamas\u0131 genellikle 150% ~ 500%; s\u0131k\u0131\u015ft\u0131rma deformasyonu (85 \u2103, 22 saat) 45%'den az olmal\u0131d\u0131r.<\/p>\n\n\n\n

Y\u0131rt\u0131lma mukavemeti 5N \/ m'den b\u00fcy\u00fck olmal\u0131d\u0131r; ozon ya\u015flanmas\u0131 (50pphm, stre\u00e7 20%, 72h) \u00e7atlak olmamal\u0131d\u0131r; xenon lamba Ya\u015flanma (xenon lamba 1200 ekipman\u0131 kullanarak, ba\u011f\u0131l nem 80% ~ 95%, siyah plaka s\u0131cakl\u0131\u011f\u0131 55 \u2103 ~ 60 \u2103, 1000h) gerilme mukavemeti ve uzamas\u0131 15%'yi ge\u00e7emez.<\/p>\n\n\n\n

Cams\u0131 ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (TR) maksimum -50 \u2103; termal ya\u015fland\u0131rma testi (100 \u2103, 70 saat), sertlik de\u011fi\u015fimi \u00b1 5, gerilme mukavemeti de\u011fi\u015fimi \u00b1 15% olmal\u0131 ve d\u00fc\u015f\u00fc\u015f\u00fcn uzamas\u0131 30%'yi ge\u00e7memelidir.<\/p>\n\n\n\n

Genel olarak, a\u015fa\u011f\u0131dakilerden yap\u0131lm\u0131\u015f otomotiv contalar\u0131n\u0131n hizmet \u00f6mr\u00fc EPDM kau\u00e7uk<\/a> on y\u0131ldan daha uzun bir s\u00fcreye ula\u015fabilir. Bununla birlikte, ger\u00e7ek \u00fcretim ve uygulamada, bir y\u0131ll\u0131k kurulumdan sonra kap\u0131 ve pencere contalar\u0131nda y\u00fczey \u00e7atlamas\u0131, s\u0131zd\u0131rmazl\u0131k performans\u0131 kayb\u0131, y\u00fczey buzlanmas\u0131 ve di\u011fer ar\u0131za olaylar\u0131yla da kar\u015f\u0131la\u015ft\u0131k.<\/p>\n\n\n\n

\u00dcr\u00fcn testinin y\u00fczey \u00e7atlamas\u0131, 20 saat sonra \u00e7atlayan ozon direnci testi, standart gereklilikleri kar\u015f\u0131lamamaktad\u0131r. Bu standart alt\u0131 \u00fcr\u00fcn grubunun incelenmesinden sonra, form\u00fclasyon hatas\u0131 (EPDM kau\u00e7uk<\/a> i\u00e7eri\u011fi daha azd\u0131r) kau\u00e7uk s\u0131zd\u0131rmazl\u0131k y\u00fczeyi donmas\u0131ndan (\u00e7i\u00e7eklenme) kaynaklanm\u0131\u015ft\u0131r.<\/p>\n\n\n\n

Sebep analizi:<\/strong><\/p>\n\n\n\n

(1) Yanl\u0131\u015f tasarlanm\u0131\u015f form\u00fclasyonlar. Doygunluk ta\u015fmas\u0131 nedeniyle bile\u015fenlerdeki k\u00fck\u00fcrt sar\u0131s\u0131, h\u0131zland\u0131r\u0131c\u0131, aktivat\u00f6r, antioksidan vb.; inorganik kalsiyum karbonat dolgu stres ta\u015fmas\u0131.<\/p>\n\n\n\n

(2) Kar\u0131\u015ft\u0131rma i\u015fleminin yanl\u0131\u015f yap\u0131lmas\u0131, \u00e7ok k\u0131sa bir s\u00fcre, dolgu maddesinin e\u015fit olmayan da\u011f\u0131l\u0131m\u0131na neden olur, yerel doygunluktan daha fazla. Form\u00fcl de\u011fi\u015ftirilerek, kar\u0131\u015ft\u0131rma s\u00fcresi art\u0131r\u0131larak ve son olarak ta\u015fma sorunu \u00e7\u00f6z\u00fclebilir.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

Hidrolik fren hortumlar\u0131nda ve yuvarlak contalarda EPDM uygulamas\u0131<\/mark><\/h2>\n\n\n\n

EPDM fren s\u0131v\u0131s\u0131na dayan\u0131kl\u0131 (DOT3, DOT4, DOT5 (silikon ya\u011f\u0131 bazl\u0131) \u00f6zellikler, hidrolik fren hortumu i\u00e7 lastik tabakas\u0131 ve fren pompas\u0131 contalar\u0131n\u0131n \u00fcretiminde kullan\u0131l\u0131r.<\/p>\n\n\n\n

Bunlar EPDM \u00fcr\u00fcnleri<\/a> ana ortam fren s\u0131v\u0131s\u0131 ile temas halindedir, -40 \u2103 ~ 120 \u2103 aras\u0131ndaki s\u0131cakl\u0131klarda ve 135 \u2103'ye kadar k\u0131sa s\u00fcreli \u0131s\u0131ya dayan\u0131kl\u0131 s\u0131cakl\u0131klarda kullan\u0131l\u0131r.\u00a0\u00a0<\/p>\n\n\n\n

EPDM kullan\u0131lan bu t\u00fcr par\u00e7alar\u0131n sertli\u011fi (Shore A) 80'dir; gerilme mukavemeti 10.5MPa'dan fazla olmal\u0131d\u0131r; kopma uzamas\u0131 genellikle 175%'nin \u00fczerindedir; 2.5 ~ 4MPa sabit uzama geriliminin 50% uzama oran\u0131nda; 8MPa veya daha fazla sabit uzama geriliminin 100% uzama oran\u0131nda.<\/p>\n\n\n\n

S\u0131k\u0131\u015ft\u0131rma deformasyonu (100 \u2103, 22 saat) 40%'den az olmal\u0131d\u0131r; cam ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (TR) maksimum -50 \u2103; ozon ya\u015flanmas\u0131 (50 pphm, 20% uzama, 72 saat) \u00e7atlak olmamal\u0131d\u0131r; fren s\u0131v\u0131s\u0131 testi (numuneyi fren s\u0131v\u0131s\u0131na koyun, 150 \u2103, 70 saat) sertlik de\u011fi\u015fimi 5 olmal\u0131d\u0131r.<\/p>\n\n\n\n

\u00c7ekme mukavemeti de\u011fi\u015fimi \u00b1 20%, uzama de\u011fi\u015fimi -15% ~ 20%, hacim de\u011fi\u015fimi \u00b1 20% i\u00e7inde olmal\u0131d\u0131r. 20%, hacim de\u011fi\u015fimi \u00b1 5% olmal\u0131d\u0131r; termal test (125 \u2103, 70h), sertlik de\u011fi\u015fimi \u00b1 5 olmal\u0131, \u00e7ekme mukavemeti de\u011fi\u015fimi \u00b1 15% olmal\u0131 ve d\u00fc\u015f\u00fc\u015f\u00fcn uzamas\u0131 15%'yi ge\u00e7emez.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

Is\u0131tma, havaland\u0131rma ve iklimlendirme hortum uygulamalar\u0131nda EPDM<\/mark><\/h2>\n\n\n\n

Kau\u00e7uk hortum genellikle i\u00e7 katman, orta takviye katman\u0131 (kimyasal elyaf kuma\u015f veya \u00e7elik tel) ve d\u0131\u015f katman olmak \u00fczere \u00fc\u00e7 katmandan olu\u015fur. \u00dc\u00e7 katman i\u00e7in kullan\u0131lan malzemeler ger\u00e7ek gereksinimlere g\u00f6re se\u00e7ilmelidir.<\/p>\n\n\n\n

\u0130\u00e7 katman, iletilen ortam\u0131n korozyonuna kar\u015f\u0131 dayan\u0131kl\u0131 olmal\u0131, d\u0131\u015f katman ise mekanik mukavemete sahip olmal\u0131 ve d\u0131\u015f ortama uyarlanmal\u0131d\u0131r.<\/p>\n\n\n\n

Bu nedenle, i\u00e7 ve d\u0131\u015f kau\u00e7uk genellikle kau\u00e7uk de\u011fildir. EPDM, kau\u00e7uk tabakan\u0131n i\u00e7indeki ve d\u0131\u015f\u0131ndaki \u0131s\u0131tma ve havaland\u0131rma hortumlar\u0131nda ve d\u0131\u015f kau\u00e7uk tabakadaki klima hortumlar\u0131nda yayg\u0131n olarak kullan\u0131lmaktad\u0131r, \u00e7\u00fcnk\u00fc malzeme havaya, suya, ozona, g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131n\u0131n ya\u015flanmas\u0131na ve d\u00fc\u015f\u00fck s\u0131cakl\u0131k esnekli\u011fine kar\u015f\u0131 iyi bir dirence sahiptir.<\/p>\n\n\n\n

EPDM kullanan bu t\u00fcr par\u00e7alar, 70 i\u00e7in sertlik (Shore A); \u00e7ekme mukavemeti 10.5MPa'dan fazla olmal\u0131d\u0131r; kopma uzamas\u0131 genellikle 300%'den fazlad\u0131r; s\u0131k\u0131\u015ft\u0131rma art\u0131k deformasyonu (100 \u2103, 22 saat) 40%'den az olmal\u0131d\u0131r; <\/p>\n\n\n\n

Cam ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (TR) maksimum -45 \u2103; ozon ya\u015fland\u0131rma (50pphm, 20% germe, 72 saat) \u00e7atlak olmamal\u0131d\u0131r; IRM902 ya\u011f testi (numuneyi IRM902 ya\u011f\u0131na koyun, 100 \u2103, 70 saat) sertlik azalmas\u0131 maksimum 15, \u00e7ekme mukavemeti azalmas\u0131 maksimum 30%.<\/p>\n\n\n\n

Y\u0131rt\u0131lma mukavemeti azalmas\u0131 maksimum 30%, hacim de\u011fi\u015fimi 80% i\u00e7inde olmal\u0131d\u0131r; termal ya\u015flanma testi (125 \u2103, 70 saat), sertlik de\u011fi\u015fimi \u00b1 5, \u00e7ekme mukavemeti de\u011fi\u015fimi \u00b1 15% olmal\u0131d\u0131r, uzama azalmas\u0131 40%'yi ge\u00e7emez.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

EPDM kay\u0131\u015f \u00e7ekme uygulamas\u0131nda<\/mark><\/h2>\n\n\n\n

Esas olarak jant kapa\u011f\u0131, ak\u00fc kutusu kapa\u011f\u0131 sabitleme vb. aras\u0131ndaki ba\u011flant\u0131 i\u00e7in kullan\u0131lan bu t\u00fcr bir par\u00e7a, i\u015flemin kullan\u0131m\u0131nda y\u00fcksek dinamik ve mekanik y\u00fcke dayanabilir ve her zaman gerilim durumundad\u0131r.<\/p>\n\n\n\n

Bunlar silikon kau\u00e7uk \u00fcr\u00fcnler<\/a> esas olarak g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131na, suya ve ozona maruz kal\u0131r, -40 \u2103 ~ 85 \u2103 s\u0131cakl\u0131klarda kullan\u0131l\u0131r, k\u0131sa s\u00fcreli \u0131s\u0131ya dayan\u0131kl\u0131 s\u0131cakl\u0131k 100 \u2103'ye ula\u015fabilir.<\/p>\n\n\n\n

Bu t\u00fcr par\u00e7alar\u0131 yapmak i\u00e7in kullan\u0131lan EPDM malzemesi, sertlik (Shore A) genellikle 60 ~ 80'dir; gerilme mukavemeti 14MPa'dan fazla olmal\u0131d\u0131r; kopma uzamas\u0131 genellikle 200% ~ 400%'dir; y\u0131rt\u0131lma mukavemeti 7N \/ m'den b\u00fcy\u00fck olmal\u0131d\u0131r;<\/p>\n\n\n\n

S\u0131k\u0131\u015ft\u0131rma kal\u0131nt\u0131 deformasyonu (85 \u2103, 22 saat) 45%'den az olmal\u0131d\u0131r; s\u0131k\u0131\u015ft\u0131rma kal\u0131nt\u0131 deformasyonu (-20 \u2103, 22 saat) 45%'den az olmal\u0131d\u0131r; ozon ya\u015flanmas\u0131na kar\u015f\u0131 diren\u00e7 (50pphm, 20% germe, 72 saat) \u00e7atlak olmamal\u0131d\u0131r; xenon lamba ya\u015flanmas\u0131 (xenon lamba 1200 ekipman\u0131 kullanarak, ba\u011f\u0131l nem 80% ~ 95%, siyah plaka s\u0131cakl\u0131\u011f\u0131 55 \u2103 ~ 60 \u2103, 1000 saat) d\u00fc\u015f\u00fc\u015f\u00fcn gerilme mukavemeti ve uzamas\u0131 15%'yi ge\u00e7memelidir; <\/p>\n\n\n\n

Cam ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (TR) maksimum -50 \u2103; \u0131s\u0131l ya\u015fland\u0131rma testi (100 \u2103, 70 saat), sertlik de\u011fi\u015fimi \u00b1 75, gerilme mukavemeti de\u011fi\u015fimi \u00b1 15%, uzama azalmas\u0131 40%'yi ge\u00e7memelidir.<\/p>\n\n\n\n

Ak\u00fc kapa\u011f\u0131 kay\u0131\u015f\u0131n\u0131n k\u0131r\u0131lmas\u0131 ve tekerlek koruma kay\u0131\u015f\u0131n\u0131n y\u00fczeyindeki \u00e7atlaklar yar\u0131m y\u0131ll\u0131k y\u00fcklemeden sonra \u00fcretildi. \u00dcr\u00fcn\u00fcn gerilme mukavemeti, y\u0131rt\u0131lma mukavemeti ve ozon ya\u015fland\u0131rma testinin ba\u015far\u0131s\u0131z olmas\u0131ndan sonra, elde edilen ger\u00e7ek sonu\u00e7lar 8.5MPa gerilme mukavemeti, y\u0131rt\u0131lma mukavemeti 5N \/ m ve ozon ya\u015fland\u0131rma 42 saat \u00e7atlama idi ve bunlar standart gerekliliklere uygun de\u011fildi. <\/p>\n\n\n\n

Kau\u00e7uk form\u00fcl\u00fcn\u00fcn \u00f6nemine ili\u015fkin bireysel \u00e7ekme band\u0131 \u00fcreticileri, EPDM kau\u00e7uk kau\u00e7uk \u00e7ekme band\u0131ndan yap\u0131ld\u0131\u011f\u0131 s\u00fcrece, asl\u0131nda farkl\u0131 form\u00fclasyonlar nedeniyle \u00fcr\u00fcn performans\u0131n\u0131n b\u00fcy\u00fck \u00f6l\u00e7\u00fcde de\u011fi\u015febilece\u011fini yeterince anlamamaktad\u0131r.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

EPDM'nin motor so\u011futma sistemi ve klima ve so\u011futma sistemi contalar\u0131nda uygulanmas\u0131<\/mark><\/h2>\n\n\n\n

EPDM, motor so\u011futma sistemlerinde conta yap\u0131m\u0131nda kullan\u0131l\u0131r. Bu \u00fcr\u00fcnler antifriz, g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131, su, ozon, -40 \u2103 ~ 125 \u2103 s\u0131cakl\u0131k kullan\u0131m\u0131 ve 135 \u2103'ye kadar k\u0131sa s\u00fcreli \u0131s\u0131ya dayan\u0131kl\u0131 s\u0131cakl\u0131klar ile temas halindedir.<\/p>\n\n\n\n

EPDM kullanan bu t\u00fcr par\u00e7alar, 60 ~ 80 i\u00e7in sertlik (Shore A) (so\u011futma sisteminde yuvarlak contalar\u0131n uygulanmas\u0131 i\u00e7in 75); gerilme mukavemeti 10'dan fazla olmal\u0131d\u0131r.5MPa; kopma uzamas\u0131 genellikle 175%'den fazlad\u0131r; 1 ~ 2MPa sabit uzama geriliminin 50% uzama oran\u0131nda; 2 ~ 5MPa sabit uzama geriliminin 100% uzama oran\u0131nda; b\u00fcz\u00fclme deformasyonu (150 \u2103, 22 saat) 20%'den az olmal\u0131d\u0131r; <\/p>\n\n\n\n

Is\u0131ya dayan\u0131kl\u0131 s\u0131cakl\u0131\u011f\u0131 135 \u2103'ye kadar (22 saat) 20%'den daha az olmal\u0131d\u0131r; cam ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (TR) maksimum -50 \u2103'dir; ozon ya\u015flanma direnci (50pphm, 20% germe, 72 saat) \u00e7atlak olmamal\u0131d\u0131r;<\/p>\n\n\n\n

Motor so\u011futma sistemlerinde kullan\u0131lan contalar i\u00e7in bir so\u011futucu testi yap\u0131lmal\u0131d\u0131r (antifriz i\u00e7ine yerle\u015ftirilmi\u015f test numunesi, 150\u00b0C, 166 saat, test bas\u0131nc\u0131 yakla\u015f\u0131k 0,4 MPa) ve sertlikteki de\u011fi\u015fim \u00b15, \u00e7ekme mukavemetindeki de\u011fi\u015fim \u00b120%, kopma uzamas\u0131ndaki de\u011fi\u015fim -15% ila 20% ve hacimdeki de\u011fi\u015fim \u00b15% olmal\u0131d\u0131r;<\/p>\n\n\n\n

Klima sistemlerinde kullan\u0131lan contalar i\u00e7in bir so\u011futucu testi yap\u0131lmal\u0131d\u0131r (P testine yerle\u015ftirilen numune (numuneyi PAG, ND8 so\u011futucu ak\u0131\u015fkan, 100 \u2103, 70 saat i\u00e7ine koyun) \u00b1 5'e kadar sertlik de\u011fi\u015fimi, \u00b1 20%'ye kadar gerilme mukavemeti de\u011fi\u015fimi, -15% ~ 20%'ye kadar kopma uzamas\u0131, hacim de\u011fi\u015fimi \u00b1 5% i\u00e7inde olmal\u0131d\u0131r; termal ya\u015fland\u0131rma testi (150 \u2103, 70 saat), sertlik de\u011fi\u015fimi \u00b1 5 olmal\u0131, gerilme mukavemeti d\u00fc\u015f\u00fc\u015f\u00fc 10%'den az olmal\u0131, uzama d\u00fc\u015f\u00fc\u015f\u00fc 10%'yi ge\u00e7emez.<\/p>\n\n\n\n

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\"\"<\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n

So\u011futma s\u0131v\u0131s\u0131 hortumu uygulamas\u0131nda EPDM<\/mark><\/h2>\n\n\n\n

EPDM, motor su hortumu yapmak i\u00e7in kullan\u0131l\u0131r, i\u00e7 ve d\u0131\u015f kau\u00e7uk katmanlar\u0131 EPDM malzemeden yap\u0131lm\u0131\u015ft\u0131r. Bu t\u00fcr EPDM \u00fcr\u00fcnleri<\/a> Ortamla temas halinde antifriz, g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131, su, ozon, -40 \u2103 ~ 125 \u2103 s\u0131cakl\u0131k kullan\u0131m\u0131, k\u0131sa s\u00fcreli \u0131s\u0131ya dayan\u0131kl\u0131 s\u0131cakl\u0131k 150 \u2103'ye ula\u015fabilir.<\/p>\n\n\n\n

Bu t\u00fcr par\u00e7alar EPDM, 65 i\u00e7in sertlik (Shore A) kulland\u0131; \u00e7ekme mukavemeti 10.5MPa'n\u0131n \u00fczerinde olmal\u0131d\u0131r; 300%'den fazla kopmada uzama; 1 ~ 2MPa sabit gerilme geriliminin 50% uzama oran\u0131nda; 2 ~ 4.5MPa sabit gerilme geriliminin 100% uzama oran\u0131; s\u0131k\u0131\u015ft\u0131rma art\u0131k deformasyonu (100 \u2103, 22 saat) 20%'den az olmal\u0131d\u0131r;<\/p>\n\n\n\n

Cam ge\u00e7i\u015f s\u0131cakl\u0131\u011f\u0131 (TR) maksimum -50 \u2103; ozon ya\u015fland\u0131rma (50pphm, 20% germe, 72 saat) \u00e7atlak olmamal\u0131d\u0131r; so\u011futma s\u0131v\u0131s\u0131 testi (antifriz i\u00e7ine yerle\u015ftirilen numune, 150 \u2103, 166 saat, yakla\u015f\u0131k 0.4MPa test bas\u0131nc\u0131).<\/p>\n\n\n\n

Sertlik de\u011fi\u015fimi \u00b1 5, \u00e7ekme mukavemeti de\u011fi\u015fimi \u00b1 20%, kopma uzamas\u0131 de\u011fi\u015fimi -15% ~ 20%, hacim de\u011fi\u015fimi \u00b1 5% olmal\u0131d\u0131r. Is\u0131l ya\u015fland\u0131rma testi (150 \u2103, 70 saat), sertlik de\u011fi\u015fimi \u00b1 5 olmal\u0131, gerilme mukavemeti 10%'den az olmal\u0131 ve d\u00fc\u015f\u00fc\u015f\u00fcn uzamas\u0131 10%'yi ge\u00e7memelidir.<\/p>","protected":false},"excerpt":{"rendered":"

EPDM (EPDM kau\u00e7uk), iyi esneklik, a\u015f\u0131nma direnci, \u0131s\u0131 direnci, hava direnci, ozon direnci, tatl\u0131 su ve deniz suyu direncine sahip sentetik kau\u00e7uk olarak, kap\u0131 ve pencere contalar\u0131, hidrolik fren hortumlar\u0131 ve contalar\u0131, klima havaland\u0131rma kanallar\u0131, motor so\u011futma sistemlerindeki contalar ve klima so\u011futma sistemleri, hortumlar gibi otomotiv kau\u00e7uk \u00fcr\u00fcnlerinde yayg\u0131n olarak kullan\u0131lmaktad\u0131r [...]<\/p>","protected":false},"author":1,"featured_media":5409,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/posts\/5407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/comments?post=5407"}],"version-history":[{"count":26,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/posts\/5407\/revisions"}],"predecessor-version":[{"id":5458,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/posts\/5407\/revisions\/5458"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/media\/5409"}],"wp:attachment":[{"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/media?parent=5407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/categories?post=5407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmoulding.com\/tr\/wp-json\/wp\/v2\/tags?post=5407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}