Extrusion blow molded articles and processes for making same
AssigneeExxonMobil Chemical Patents Inc.
InventorRobert M. Canright
Life of this patent
Estimating the term…
Abstract
Extrusion blow molded articles and processes for making same. In some examples, the article can include a polyethylene copolymer derived from ethylene and at least one C3 to C20 α-olefin. The polyethylene copolymer can have an I2.16 (190° C./2.16 kg) of 0.2 g/10 min to 1 g/10 min, a melt index ratio of 30 to 80, and a density of 0.910 g/cm3 to 0.940 g/cm3. The article can be formed by extrusion blow-molding the polyethylene copolymer. At least one surface of the article can have an average gloss of at least 40.
Claims18
An article comprising a polyethylene copolymer derived from ethylene and at least one C3 to C20 α-olefin, wherein the polyethylene copolymer has:
- an I2.16 (190° C./2.16 kg) of 0.2 g/10 min to 1 g/10 min,
- a melt index ratio of 30 to 80, and
- a density of 0.910 g/cm3 to 0.940 g/cm3,
- wherein the article is formed by extrusion blow-molding the polyethylene copolymer,
- wherein at least one surface of the article has an average gloss of at least 40, and
- wherein the polyethylene copolymer has:
- an Izod impact at 23° C. (measured according to ASTM D256-10 (2018), Method A) in a range of from 8 ft-lb/in. to 15 ft-lb/in.;
- an Izod impact at 0° C. (measured according to ASTM D256-10 (2018), Method A) in a range of from 4 ft-lb/in. to 16 ft-lb/in.;
- a Shore hardness D (measured according to ASTM D 2240-15el) in a range of from 45 to 60;
- or a combination thereof.
A process for making an article, comprising:
- extruding a polymer composition to produce a parison;
- closing a mold around the parison;
- injecting a fluid into the mold to inflate the parison against an inner surface of the mold to form the article;
- and
- removing the article from the mold, wherein the polymer composition comprises a polyethylene copolymer derived from ethylene and at least one C3 to C20 α-olefin, wherein the polyethylene copolymer has:
- an I2.16 (190° C./2.16 kg) of 0.2 g/10 min to 1 g/10 min,
- a melt index ratio of 30 to 80, and
- a density of 0.910 g/cm3 to 0.940 g/cm3;
- wherein at least one surface of the article has an average gloss of at least 40;
- and
- wherein the polyethylene copolymer has:
- an Izod impact at 23° C. (measured according to ASTM D256-10 (2018), Method A) in a range of from 8 ft-lb/in. to 15 ft-lb/in.;
- an Izod impact at 0° C. (measured according to ASTM D256-10 (2018), Method A) in a range of from 4 ft-lb/in. to 16 ft-lb/in.;
- a Shore hardness D (measured according to ASTM D 2240-15el) in a range of from 45 to 60;
- or a combination thereof.
Dependencies are inferred from the claim text.