Thermoplastic self-supporting board for horizontal framework has covering having thin layer of additive that improves framework together with thin layer of antiskid material or hard material

摘要

Each of the upper and lower resistant layers is comprised of a thermoplastic material. The inner ribs of the upper and lower resistant layers oppose each other without contacting. The interior of the resistant layers is comprised of a light thermoplastic material core. The exterior of the resistant layers is provided with a covering comprised of a thin layer of antiskid material or a hard material that is resistant to abrasion together with a thin layer of additive for improving the formwork.