Bumper ndi chipangizo chotetezera chomwe chimatenga ndikuchepetsa mphamvu yakunja ndikuteteza kutsogolo ndi kumbuyo kwa thupi lagalimoto. Zaka makumi awiri zapitazo, ma bumpers akutsogolo ndi kumbuyo kwa magalimoto anali opangidwa ndi zitsulo. Anasindikizidwa muzitsulo zachitsulo zooneka ngati U zokhala ndi makulidwe opitilira 3 mm, ndipo pamwamba pake amathandizidwa ndi chromium. Ankakulungidwa kapena kuwotcherera pamodzi ndi mtengo wotalika wa chimango, ndipo panali kusiyana kwakukulu ndi thupi, ngati kuti ndi gawo lolumikizidwa. Ndi chitukuko chamakampani amagalimoto, bumper yamagalimoto ngati chida chofunikira chachitetezo chilinso panjira yaukadaulo. Masiku ano magalimoto kutsogolo ndi kumbuyo bumpers kuwonjezera kukhalabe chitetezo choyambirira ntchito, komanso kufunafuna mgwirizano ndi umodzi ndi mawonekedwe a thupi, kufunafuna ake opepuka. Kuti akwaniritse cholinga ichi, magalimoto akutsogolo ndi kumbuyo amapangidwa ndi pulasitiki, yotchedwa pulasitiki bumpers. Bumper ya pulasitiki ili ndi magawo atatu: mbale yakunja, zomangira ndi mtengo. Mbalame yakunja ndi zinthu zotchinga zimapangidwa ndi pulasitiki, ndipo mtandawo umapangidwa ndi pepala lozizira lozizira ndi makulidwe pafupifupi 1.5 mm ndipo limapangidwa kukhala poyambira ngati U; Mbali yakunja ndi zinthu zomangira zimamangiriridwa ku mtengowo, womwe umalumikizidwa ndi zomangira njanji ndipo ukhoza kuchotsedwa nthawi iliyonse. Bumper ya pulasitiki iyi imagwiritsa ntchito pulasitiki, makamaka imagwiritsa ntchito mitundu iwiri yazinthu, poliyesitala ndi polypropylene, pogwiritsa ntchito njira yopangira jakisoni. Palinso mtundu wa pulasitiki wotchedwa polycarbon ester mndandanda kunja, kulowerera mu zikuchokera aloyi, ndi aloyi jekeseni akamaumba njira, processing kunja kwa bamper osati ali mkulu mphamvu okhwima, komanso ali ndi ubwino kuwotcherera, ndi ntchito ❖ kuyanika ndi zabwino, kuchuluka kwa zambiri mu galimoto. Pulasitiki bumper ali ndi mphamvu, rigidity ndi zokongoletsera, kuchokera ku malo otetezeka, ngozi ya galimoto kugunda akhoza kugwira ntchito yotchinga, kuteteza kutsogolo ndi kumbuyo galimoto galimoto, kuchokera ku maonekedwe a maganizo, akhoza mwachibadwa pamodzi ndi thupi mu chidutswa, lonse, ali ndi zokongoletsera zabwino, kukhala gawo lofunika kwambiri la maonekedwe a galimoto yokongoletsera.
