Poliyesitala. Kodi zinthu zimenezi, ndipo ndi ntchito zake

M'masiku amenewo, pamene ma polima zosiyanasiyana ndi mapulasitiki akhala akuyendera mwakhama tsiku ndi tsiku, anthu ankaganiza kuti ndi thandizo lawo amathana pafupifupi onse mavuto kwambiri zipangizo achilengedwe. Katswiriyu-luso ndi mankhwala euphoria inatenga ku makumi anai mochedwa makumi asanu ndi awiri, kufikira anthu onetsetsani kuti thonje, nsalu kapena ubweya zovala akali Nthawi zambiri kuposa kupanga chilichonse. Komabe, zaka zambiri anthu sanali chabe, ambiri ofunika kwambiri ndi zothandiza makhalidwe a ma polima analenga zinthu ntchito yawo lonse zosiyanasiyana za zochita za anthu.

Chimodzi mwa kupanga zinthu ambiri ndi poliyesitala. ndi mankhwala kwa kupanga mankhwala ena kuti ntchito panopa ndi chiyani? Kuti tiyankhe mafunso amenewa, ayenera kuzindikira kuti mankhwala ndi makina zimatha polima lapansi.

Monga chuma ndi poliyesitala multimolecular polyether unyolo. Mu kupanga polima ndi mgwirizano wolimba, izi zimapangitsa kuti kwambiri amphamvu. Zikagwiritsidwa ntchito m'myoyo zovala izi zikutanthauza kukana ake mkulu kugwetsera ndi crease. Kodi ndizabwino? N'zoona kuti ena mwa makhalidwe ameneŵa singasiyanitsidwe chimbudzi nkhani, komanso mphamvu zomuthandiza chinyezi. Koma zonse zimenezi zili ndi mavuto. Low madzi mayamwidwe ndi stiffness zakuthupi kuti akhale wovuta poyerekezera pamwamba khungu. Koma kulankhula za poliyesitala kuti kwathunthu zosafunika nsalu zovala, simungathe chabe ukulu yochepa.

m'mayiko osiyanasiyana maina osiyana malonda, amene anatchulidwa poliyesitala. Zikuchokera zipangizo akhoza pamodzi, mwachitsanzo, "65% ubweya, 35% poliyesitala." mawu, pa Koyamba, yachilendo Ndipotu, ndi chidule, amene Academy of Sciences - Academy of Sciences, ndi makalata "L", "A" ndi "B" limatanthauza choyezera mankhwala apamwamba maselo. Mu US, nkhaniyi amapangidwa pansi pa dzina "Dacron".

Sayansi, polima ichi chimagwiritsidwa ntchito chifukwa katundu wapadera. Mwachitsanzo, kwa kupanga zipangizo ma CD akhale wamphamvu mkulu, poliyesitala lonse ntchito. ndi zizindikiro zimenezi? Kwake kwa kumanga strapping bales ndi zayamba kuwongola mphamvu compressive kokha pang'ono otsika kukaniza kuti akugwera wa Mzere zitsulo, mmene polima ndi zosavuta ndi, Chofunika, kupatula chitsulo. Mphamvu poliyesitala filaments amachititsa ntchito yawo milandu kumene msoko ayenera kukhala odalirika, ndi zingwe, nsalu kwa iwo, chingathe kupirira akatundu kwambiri.

Makampani a ndege ndi kumanga magalimoto lonse zaka lomaliza mwakhama kuwonjezera kuchuluka kwa ntchito zipangizo gulu polymeric. item iliyonse, kumene umagwiritsidwa ntchito m'malo zotsimikizira pulasitiki dural, kuchepetsa thupi ndi bwino kukana dzimbiri. Asilikali ndege, poliyesitala uyu ali katundu ina yofunika: ndi ofufuza anapeza pofufuza poliyesitala, izo radioprovodyaschy zakuthupi. Mundawu amalola kuchita kwa Rada radomes wake ndi ndege silhouette amakhala zochepa kuonekera kwa mpweya chitetezo mdani zotheka.