Nā hiʻohiʻona hana: ʻO ke ʻano hou loa o ʻehā PVC uila busing laina hana hana i kahi twin-screw extruder me ka kiʻekiʻe kiʻekiʻe a me ka hana plasticization maikaʻi, a ua hoʻolako ʻia me kahi mold i hoʻolālā ʻia no ka hoʻolālā ala kahe. ʻEhā mau paipu i hoʻokuʻu like a me ka wikiwiki o ka extrusion. Hiki ke ho'omalu 'ia a ho'oponopono 'ia nā pahu ho'olu'u 'ehā me ka ho'opilikia 'ole i kekahi i kekahi ma ke ka'ina hana.