Co-extrusion board ke theknoloji e ncha.Ho fapana le boto e 'ngoe ea foam, ho na le likarolo tse peli tsa kutu ka mahlakoreng ka bobeli a boto ea foam e kopaneng.
E tšoauoa ka bokaholimo bo boreleli haholo 'me ke ea boto ea foam ea boleng bo holimo ea PVC.Theko e boetse e theko e boima ka 5% ho feta mefuta e meng ea PVC foam boar