Polymer composite materials are disclosed containing one or more chemical scavengers. The polymer composites are porous and are configured to be contacted with a liquid for removing trace amounts of metals, proteins, polypeptides, polyphenols, other organic compounds, and the like. In order to produce the porous composite polymer product, one or more chemical scavengers are combined with thermoplastic polymer particles and sintered into a shape. The polymer particles act as a binder trapping or encasing the one or more chemical scavengers in the porous structure.

Polymer composite materials are disclosed containing one or more chemical scavengers. The polymer composites are porous and are configured to be contacted with a liquid for removing trace amounts of metals, proteins, polypeptides, polyphenols, other organic compounds, and the like. In order to produce the porous composite polymer product, one or more chemical scavengers are combined with high density polyethylene particles and sintered into a shape. The polyethylene resin acts as a binder trapping or encasing the one or more chemical scavengers in the porous structure.

Polymer composite materials are disclosed containing one or more chemical scavengers. The polymer composites are porous and are configured to be contacted with a liquid for removing trace amounts of metals, proteins, polypeptides, polyphenols, other organic compounds, and the like. In order to produce the porous composite polymer product, one or more chemical scavengers are combined with high density polyethylene particles and sintered into a shape. The polyethylene resin acts as a binder trapping or encasing the one or more chemical scavengers in the porous structure.

Polymer composite materials are disclosed containing one or more chemical scavengers. The polymer composites are porous and are configured to be contacted with a liquid for removing trace amounts of metals, proteins, polypeptides, polyphenols, other organic compounds, and the like. In order to produce the porous composite polymer product, one or more chemical scavengers are combined with high density polyethylene particles and sintered into a shape. The polyethylene resin acts as a binder trapping or encasing the one or more chemical scavengers in the porous structure.

Polymer composite materials are disclosed containing one or more chemical scavengers. The polymer composites are porous and are configured to be contacted with a liquid for removing trace amounts of metals, proteins, polypeptides, polyphenols, other organic compounds, and the like. In order to produce the porous composite polymer product, one or more chemical scavengers are combined with high density polyethylene particles and sintered into a shape. The polyethylene resin acts as a binder trapping or encasing the one or more chemical scavengers in the porous structure.

A polyethylene powder having a limiting viscosity [?] of 2.0 dl/g or more and less than 20.0 dl/g as measured in decalin at 135? C., wherein the polyethylene powder presents a percentage decrease from a specific surface area A measured by the BET method before heating at 120? C. for 5 h to a specific surface area B measured by a BET method after heating at 120? C. for 5 h, ((A?B)/A?100), of 0.1% or more and less than 35%.

A polyethylene powder having a limiting viscosity [?] of 2.0 dl/g or more and less than 20.0 dl/g as measured in decalin at 135? C., wherein the polyethylene powder presents a percentage decrease from a specific surface area A measured by the BET method before heating at 120? C. for 5 h to a specific surface area B measured by a BET method after heating at 120? C. for 5 h, ((A?B)/A?100), of 0.1% or more and less than 35%.

An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium (10) has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A thickness of the first porous PTFE membrane is in the range of 4 to 40 m and a specific surface area of the first porous PTFE membrane is 0.5 m.sup.2/g or less.

An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium (10) has a first main surface and a second main surface, and the first porous PTFE membrane and the second porous PTFE membrane are arranged so that an air flow moving from the first main surface to the second main surface passes through the first porous PTFE membrane and subsequently through the second porous PTFE membrane. A thickness of the first porous PTFE membrane is in the range of 4 to 40 m and a specific surface area of the first porous PTFE membrane is 0.5 m.sup.2/g or less.

Melamine Formaldehyde (MF) photonic cooling bulk is disclosed for covering outer surfaces of a building. The MF photonic cooling bulk comprises a mass of hydraulically pressed MF microparticles that has been thermally annealed to form a fire and corrosion-resistant, cross-linked photonic cooling bulk configured to reflect incident solar irradiation and radiate heat from the building to the outer space.