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 za U-channel ndi makulidwe oposa 3mm. Pamwamba pake amathandizidwa ndi chrome ndikuwotchedwa kapena kuwotcherera pamodzi ndi njanji ya chimango. Ndi chitukuko cha mafakitale 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 izi, magalimoto akutsogolo ndi kumbuyo amapangidwa ndi pulasitiki, yotchedwa pulasitiki bumpers. Bomba la pulasitiki limapangidwa ndi magawo atatu, monga mbale yakunja, zomangira ndi mtengo. Mbale yakunja ndi zinthu zotchingira zimapangidwa ndi pulasitiki, ndipo mtengowo umapangidwa ndi pepala lozizira lopiringizika lokhala ndi makulidwe pafupifupi 1.5 mm ndipo limapondedwa munjira yooneka ngati U; Chimbale chakunja ndi zinthu zomangira zimamangiriridwa pamtengo, womwe umamangiriridwa ku screw njanji ya chimango ndipo ukhoza kuchotsedwa nthawi iliyonse. Mtundu uwu wa bumper wa pulasitiki umagwiritsa ntchito pulasitiki, makamaka umagwiritsa ntchito mndandanda wa poliyesitala ndi mndandanda wa polypropylene wazinthu ziwiri, pogwiritsa ntchito njira yopangira jakisoni. Kunja palinso mtundu wa pulasitiki wotchedwa polycarbon ester, kulowetsedwa mu aloyi zikuchokera, 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 zochulukirapo m'galimoto. Pulasitiki ya pulasitiki imakhala ndi mphamvu, yokhazikika komanso yokongoletsera, kuchokera kumalo otetezeka, kugunda kwa galimoto kungathe kuchitapo kanthu, kuteteza kutsogolo ndi kumbuyo kwa galimoto yamoto, kuchokera ku maonekedwe, akhoza kuphatikizidwa mwachibadwa ndi thupi mu chidutswa, chophatikizidwa mu yonse, imakhala ndi zokongoletsera zabwino, imakhala gawo lofunikira pakuwoneka bwino kwagalimoto.
