Zvimiro: 1.Polypropylene inogona kuve inogadziriswa pa121 ℃ uye zvakare yakareba-yakareba yakatsiga pa-80 ℃ 2.U-yakaumbwa uye V-yakaumbwa yepasi nzira yekubuditsa nhepfenyuro mosst inokodzera kusanganisa uye kuunganidzwa kwesampuli 3.