The disclosure provides porous scaffold that include a plurality of microspheres, where the microspheres include a biodegradable polymer blended with a graphene family material (GFM), micro spheres, and methods for making and using such scaffolds and microspheres.

The disclosure provides porous scaffold that include a plurality of microspheres, where the microspheres include a biodegradable polymer blended with a graphene family material (GFM), micro spheres, and methods for making and using such scaffolds and microspheres.

A polyethylene powder having a limiting viscosity [η] 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 [η] 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 polymer composition can be used in selective absorbing sintering, SAS, or selective inhibition sintering, SIS, methods. The polymer of the polymer composition has open mesopores, where a cumulative pore volume distribution of the mesopores, measured according to DIN 66134, is at least 0.01 cm.sup.3/g.

A polymer composition can be used in selective absorbing sintering, SAS, or selective inhibition sintering, SIS, methods. The polymer of the polymer composition has open mesopores, where a cumulative pore volume distribution of the mesopores, measured according to DIN 66134, is at least 0.01 cm.sup.3/g.

A polymer composite contains tubular particles, which contain at least one resin with fibres embedded. The tubular particles have an average length in the range of 0.5 mm to 60 mm and an average wall thickness in the range of 0.0005 mm to 30 mm, whereas the fibers have an average diameter in the range of 0.0005 mm to 5.0 mm. A process can be used to prepare the polymer composite containing tubular particles. The polymer composite can be used as a cushioning material, which can be formed into a cushioning article such as a shoe sole, a furniture cushion, a bed mattress, an automotive seat cushion, a flooring substrate, an outdoor/walking surface, a mat, a pad, and the like.

A polymer composite contains tubular particles, which contain at least one resin with fibres embedded. The tubular particles have an average length in the range of 0.5 mm to 60 mm and an average wall thickness in the range of 0.0005 mm to 30 mm, whereas the fibers have an average diameter in the range of 0.0005 mm to 5.0 mm. A process can be used to prepare the polymer composite containing tubular particles. The polymer composite can be used as a cushioning material, which can be formed into a cushioning article such as a shoe sole, a furniture cushion, a bed mattress, an automotive seat cushion, a flooring substrate, an outdoor/walking surface, a mat, a pad, and the like.

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 μm 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 μm and a specific surface area of the first porous PTFE membrane is 0.5 m.sup.2/g or less.