Eco-friendly adhesive MDI has strong reactivity so that it can react with straw cellulose molecular to form firm irreversible new chemical bonds working as effective bonds inside the board. Due to the way that polymers combined together firmly and steadily, MDI has been widely used in automobile industry to make bumper, brake pad, damper, and so on. MDI has also been applied to military area as an important material in manufacturing armor, bulletproof helmets and armor vehicles. Thus, Wanhua Eco board has the advantage of hard texture, steady shape, high strength and good ability in bearing and resisting deformation.

Large amount of natural wax layer on the surface of the straw fiber has a damp proof effect for Ecoboard like the paraffin additive in damp proof slab. In addition, MDI itself plays an important part in producing waterproof coating and sealant. After MDI reacting with straw fibers, the polymer composite structure formed in the reaction has pretty good hydrophobic property. Consequently, Ecoboard is not easy to absorb moisture. Furthermore, its volume tolerance after being affected with damp is superior to ordinary artificial boards.