Kodi Thupi la Rubber Ndi Chiyani?

Zotsatirazi ndi mawonekedwe a raba:

· Mphamvu yokoka yeniyeni

· Abrasion kukana

· Kukana misozi

· Compress set

· Kupirira

· Elongation

· Tensile modulus

· Kulimba kwamakokedwe

· Kuuma

Kuuma

Kapangidwe kakemidwe ka elastomers kumawapatsa kuuma kwachilengedwe komwe kumatha kusinthidwa. Kuuma kosinthidwa kumayesedwa potengera durometer (duro) pa sikelo ya Shore. Shore A amagwiritsidwa ntchito ngati mphira wofewa mpaka wapakati. Rabara yolimba, yokhala ndi zofufutira za pensulo, imakhala ndi kuuma kwa 40 duro. Mosiyana ndi izi, mphira wolimba, monga womwe umagwiritsidwa ntchito mu hockey pucks, uli ndi kulimba kwa 90 duro.

Kulimba kwamakokedwe

Kulimba kwamphamvu ndi kuchuluka kwa mphamvu yofunikira kung'amba fanizo la mphira mpaka litasweka. Imadziwikanso ngati mphamvu yomaliza yolimba, ndipo imayesedwa potengera ma megapascals kapena mapaundi pa mainchesi lalikulu (psi) malinga ndi ASTM D412. Kulimba kwamphamvu ndi chinthu chofunikira kwambiri kwa opanga ndi ogula chifukwa zikuwonetsa kulephera komwe kumachitika chifukwa cha kutambasula kwa rabara.

Tensile Modulus

Tensile modulus ndi kupsinjika kapena mphamvu yofunikira popanga kupsyinjika kapena kuchuluka kwachulukidwe mu zitsanzo za rabala. Ngakhale zimamveka mofanana ndi mphamvu zolimba, katundu wake ndi wosiyana. Rabara yolimba nthawi zambiri imakhala ndi modulus yapamwamba kwambiri, yomwe imapangitsa kuti ikhale yolimba. Imalimbananso kwambiri ndi extrusion, yomwe ndi njira yopangira zinthu zomwe zimagwiritsidwa ntchito popanga mwambo.

Elongation

Kutalikira kumatanthauzidwa ngati kuchuluka kwa kuchuluka, kapena kupsyinjika, muutali woyambirira wa sampuli ya rabara pogwiritsa ntchito mphamvu yamphamvu, kapena kupsinjika. Ma elastomer ena amakonda kutambasula kwambiri poyerekeza ndi ena. Mwachitsanzo, mphira wachilengedwe amatha kutambasula mpaka 700% asanafike kutalika kwake, zomwe zimapangitsa kuti aswe. Komabe, ma fluoroelastomers amatha kupirira kutalika kwa 300%.

Kupirira

Resilience, yomwe imadziwikanso kuti rebound, ndi kuthekera kwa mphira kubwereranso kukula kwake ndi mawonekedwe ake potsatira kupunduka kwakanthawi, monga kukhudzana ndi chitsulo pamwamba. Kulimba mtima ndikofunikira pazisindikizo zosunthika zomwe zimakhala ngati chotchinga pakati pa malo osasunthika komanso oyenda. Ndikofunikira kuganizira kupirira kwa ntchito zomwe zimafuna kusintha kwanyengo pakati pa chitseko ndi chitseko.

Compression Set

Compress set ndi momwe elastomer imalephera kubwerera ku makulidwe ake oyamba ikatulutsa katundu wopondereza. Kuponderezedwa mobwerezabwereza kwa chisindikizo cha rabara pakapita nthawi kumabweretsa kupumula kwapang'onopang'ono. Kuphatikizika kokhazikitsidwa ndi zotsatira zomaliza za kuchepa kosalekeza kwa mphamvu yosindikiza.

Kukaniza Misozi

Kulimbana ndi misozi ndiko kukana kwa elastomer pakukula kwa kudula kapena nick pamene kukanidwa kukugwiritsidwa ntchito. Katunduyu, yemwe amatchedwanso mphamvu ya misozi, amayezedwa ndi ma kilonewton pa mita (kN/m) kapena mphamvu ya mapaundi pa inchi (lbf/in). Iyenera kuganiziridwa posankha chigawo chochepetsera m'mphepete chomwe chidzakhudzana ndi zinthu zakuthwa kapena m'mphepete mwachitsulo.

Abrasion Resistance

Kukana kwa abrasion ndiko kukana kwa mphira kuti abrasion ndi kukanda kapena kusisita. Labala yosamva ma abrasion imagwiritsidwa ntchito m'mafakitale kuphatikiza malamba oyendetsa malasha, ndi mapampu omwe amanyamula matope.

Specific Gravity

Mphamvu yokoka yeniyeni ndi chiŵerengero cha kulemera kwa chinthu ndi kulemera kwa voliyumu yofanana ya madzi pa kutentha kwina. Katunduyu amathandizira akatswiri a zamankhwala kuzindikira zinthu. Ndikofunikira kuti opanga magawo ndi ogula aukadaulo adziwe kuti mphira wokhala ndi mphamvu yokoka yocheperako umapereka mainchesi masikweya pa paundi ya katundu. Mosiyana ndi izi, iwo omwe ali ndi mphamvu yokoka yapamwamba amakhala ndi zabwino pakuwumba kosasinthasintha.