A method is provided to control the short chain branching (SCB) distribution of an ethylene-butene (EB) polyethylene resin that is prepared in a gas phase polymerization process using a specific type of magnesium-titanium Ziegler Natta catalyst. The method allows the level of short chain branching to be increased in the low molecular weight fraction of the resin by increasing the polymerization residence time. The polymers that are produced in accordance with this invention may be useful for the preparation of cast films and blown films, especially for stretch film applications.

A method is provided to control the short chain branching (SCB) distribution of an ethylene-butene (EB) polyethylene resin that is prepared in a gas phase polymerization process using a specific type of magnesium-titanium Ziegler Natta catalyst. The method allows the level of short chain branching to be increased in the low molecular weight fraction of the resin by increasing the polymerization residence time. The polymers that are produced in accordance with this invention may be useful for the preparation of cast films and blown films, especially for stretch film applications.

The present invention relates to a process of manufacturing skiing equipment using a high-entropy alloy, especially manufacturing for a bottom member of a ski, a blade of an ice skate shoe or the bottom member of a skiing vehicle. The high-entropy alloy is used to prepare skiing equipment, so that the skiing equipment has a small friction coefficient, obtains good speed, and can be driven with less energy, which realizes energy-saving effect.

The present invention relates to a process of manufacturing skiing equipment using a high-entropy alloy, especially manufacturing for a bottom member of a ski, a blade of an ice skate shoe or the bottom member of a skiing vehicle. The high-entropy alloy is used to prepare skiing equipment, so that the skiing equipment has a small friction coefficient, obtains good speed, and can be driven with less energy, which realizes energy-saving effect.

A method is provided to control the short chain branching (SCB) distribution of an ethylene-butene (EB) polyethylene resin that is prepared in a gas phase polymerization process using a specific type of magnesium-titanium Ziegler Natta catalyst. The method allows the level of short chain branching to be increased in the low molecular weight fraction of the resin by increasing the polymerization residence time. The polymers that are produced in accordance with this invention may be useful for the preparation of cast films and blown films, especially for stretch film applications.

A snow ski assembly is provided for use by an individual to slide across a snow covered surface, for example, under the force of gravity. The assembly includes a ski having a bottom wall for engaging a snow covered surface and an upturned peripheral region extending around a perimeter of the bottom wall to help facilitate sliding movement of the ski across a snow covered surface in any direction, without preference to a particular direction, and to help inhibit the ski from digging into the snow covered surface when sliding across the snow covered surface. The assembly also includes a mounting feature for coupling a binding to the bottom wall of the ski, such that an individual can position a foot in the binding and use the ski to slide across the snow covered surface.

A snow ski assembly is provided for use by an individual to slide across a snow covered surface, for example, under the force of gravity. The assembly includes a ski having a bottom wall for engaging a snow covered surface and an upturned peripheral region extending around a perimeter of the bottom wall to help facilitate sliding movement of the ski across a snow covered surface in any direction, without preference to a particular direction, and to help inhibit the ski from digging into the snow covered surface when sliding across the snow covered surface. The assembly also includes a mounting feature for coupling a binding to the bottom wall of the ski, such that an individual can position a foot in the binding and use the ski to slide across the snow covered surface.

A snow ski assembly is provided for use by an individual to slide across a snow covered surface, for example, under the force of gravity. The assembly includes a ski having a bottom wall for engaging a snow covered surface and an upturned peripheral region extending around a perimeter of the bottom wall to help facilitate sliding movement of the ski across a snow covered surface in any direction, without preference to a particular direction, and to help inhibit the ski from digging into the snow covered surface when sliding across the snow covered surface. The assembly also includes a mounting feature for coupling a binding to the bottom wall of the ski, such that an individual can position a foot in the binding and use the ski to slide across the snow covered surface.

A snow ski assembly is provided for use by an individual to slide across a snow covered surface, for example, under the force of gravity. The assembly includes a ski having a bottom wall for engaging a snow covered surface and an upturned peripheral region extending around a perimeter of the bottom wall to help facilitate sliding movement of the ski across a snow covered surface in any direction, without preference to a particular direction, and to help inhibit the ski from digging into the snow covered surface when sliding across the snow covered surface. The assembly also includes a mounting feature for coupling a binding to the bottom wall of the ski, such that an individual can position a foot in the binding and use the ski to slide across the snow covered surface.

Ice phobic coatings and substrates and methods of making and using them are described. Some embodiments provide for an ice-phobic coating including a hydrophobic entity bonded to a hydrophilic moiety, wherein the hydrophilic moiety is capable of lowering a freezing point of water. Some embodiments provide for an ice-phobic article including a substrate having the ice-phobic coating applied on the substrate. In some embodiments, a method of making an ice-phobic coating may include bonding the hydrophobic entity with the hydrophilic moiety. In some embodiments, a method of making an ice-phobic article includes applying the ice-phobic coating to a substrate. Some embodiments also provide for a kit for making an ice-phobic article. Such ice-phobic coatings may be used to coat or impregnate winter equipment, cloth, shoes, sporting equipment, road signs, traffic lights, sidewalks, aircrafts, vehicles, or the like.