Gel extruded articles made from high density polyethylene with narrow molecular weight distribution
AssigneeCelanese International Corporation
InventorsChristian Ohm, Arvind Yadav
Life of this patent
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Abstract
A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer. The polyethylene polymer has a narrow molecular weight distribution. Polymer articles made in accordance with the present disclosure have enhanced strength properties. In one embodiment, the polymer composition is used to form a porous membrane for use as a separator in electronic devices.
Claims30
A polymer composition for producing gel extruded articles comprising:
- a plasticizer;
- and
- high density polyethylene particles comprising a high density polyethylene polymer, the high density polyethylene particles having a median particle size by volume of greater than about 50 microns, the high density polyethylene polymer having an intercrossing point (ICP) of greater than about 150 kPa.
A porous membrane comprising:
- a high density polyethylene polymer having an intercrossing point (ICP) of greater than about 150 kPa, the high density polyethylene polymer having a molecular weight of greater than about 400,000 g/mol, the porous membrane having a tensile strength in at least one direction of greater than about 90 MPa and having a puncture strength of greater than about 500 mN/μm;
- wherein the porous membrane is formed from a polymer composition comprising high density polyethylene particles.
A polymer composition for producing gel extruded articles comprising:
- a plasticizer;
- and
- high density polyethylene particles comprising a high density polyethylene polymer, the high density polyethylene polymer having a molecular weight of greater than about 400,000 g/mol, the high density polyethylene polymer having an intercrossing point (ICP) of greater than about 150 kPa.
Dependencies are inferred from the claim text.