To modify UHMWPE make heavy duty ground mats, it can be used to provide temporary access and ground protection over and around soft nd sensitive areas. - Boron Carbide filled UHMWPE UHMWPE ntaining 5% or 10% boron polyethylene board was prepared by hot pressing process. Boron carbide/UHMWPE mposite sheet is use for neutron HDPEelding.