Kodi Makhalidwe a Polypropylene (PP) ndi chiyani?

Zina mwazinthu zofunika kwambiri za polypropylene ndi:
1.Chemical Resistance: Maziko osungunuka ndi ma asidi sachitapo kanthu mosavuta ndi polypropylene, zomwe zimapangitsa kukhala chisankho chabwino pazitsulo zamadzimadzi oterowo, monga zoyeretsera, zopangira chithandizo choyamba, ndi zina.
2.Elasticity and Toughness: Polypropylene idzachita ndi elasticity pamtundu wina wa kupotoza (monga zipangizo zonse), koma idzakhalanso ndi pulasitiki yowonongeka kumayambiriro kwa ndondomeko yowonongeka, choncho nthawi zambiri imatengedwa ngati "zolimba" zakuthupi. Kulimba ndi liwu lauinjiniya lomwe limatanthauzidwa ngati kuthekera kwa chinthu kuti chipunduke (pulasitiki, osati mokhazikika) osathyoka.
3.Kulimbana ndi Kutopa: Polypropylene imasunga mawonekedwe ake pambuyo pa kugwedezeka kwakukulu, kupindika, ndi / kapena kusinthasintha. Katunduyu ndi wofunika kwambiri popanga mahinji amoyo.
4.Insulation: polypropylene imakhala ndi mphamvu kwambiri yotsutsa magetsi ndipo imakhala yothandiza kwambiri pazinthu zamagetsi.
5.Transmissivity: Ngakhale Polypropylene imatha kupangidwa mowonekera, nthawi zambiri imapangidwa kuti ikhale yowoneka bwino mwachilengedwe. Polypropylene ingagwiritsidwe ntchito ngati kusintha kwina kwa kuwala kuli kofunika kapena komwe kuli kokongola. Ngati kufalikira kwakukulu kumafunidwa ndiye kuti mapulasitiki ngati Acrylic kapena Polycarbonate ndi zosankha zabwinoko.
Polypropylene imatchedwa "thermoplastic" (mosiyana ndi "thermoset") zomwe zimagwirizana ndi momwe pulasitiki imayankhira kutentha. Zinthu za thermoplastic zimakhala zamadzimadzi posungunuka (pafupifupi madigiri 130 Celsius ngati polypropylene).
Chofunikira chachikulu chokhudza thermoplastics ndikuti amatha kutenthedwa mpaka kusungunuka, kuziziritsidwa, ndikutenthedwanso popanda kuwonongeka kwakukulu. M'malo mowotcha, ma thermoplastics ngati polypropylene liquefy, omwe amawalola kuti apangidwe mosavuta ndi jakisoni ndikusinthidwanso.
Mosiyana ndi izi, mapulasitiki a thermoset amatha kutenthedwa kamodzi kokha (nthawi zambiri pakupanga jekeseni). Kutentha koyamba kumapangitsa kuti zipangizo za thermoset zikhazikike (zofanana ndi 2-part epoxy) zomwe zimapangitsa kusintha kwa mankhwala komwe sikungathe kusinthidwa. Mukayesa kutenthetsa pulasitiki ya thermoset kuti ikhale yotentha kwambiri kachiwiri imangoyaka. Izi zimapangitsa kuti zida za thermoset zisamangidwenso.