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US 2014/0272229 A1Published application
Polyethylene foam and multilayered structure including the same
AssigneeRaven Industries, Inc.
InventorPeixiang Xing
Life of this patent
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Abstract
The present invention relates to polyethylene foam and materials including the same. In various embodiments, the present invention provides a foam including a solid composition including polyethylene, and a gaseous composition including a blowing agent. Various embodiments provide a multilayered structure including the foam, and methods of making and using the foam and multilayered structure. In various embodiments, the multilayered structure can be a geomembrane.
Claims20
A foam, comprising:
- a solid composition comprising a blend of LDPE and a linear polyolefin;
- and
- a gaseous composition comprising a blowing agent.
A multilayered structure, comprising:
- a) at least one first layer comprising polyethylene;
- b) at least one second layer comprising a foam comprising
- a solid composition comprising LDPE, LLDPE, MDPE, HDPE, VLDPE, ULDPE, polyolefin plastomer, or any combination thereof, and
- a gaseous composition including a blowing agent;
- c) at least one first layer comprising polyethylene;
- and
- d) at least one reinforcing layer comprising scrim and optionally comprising polyethylene;
- wherein layer a) is in contact with layer b), layer b) is in contact with layer c), and layer d) is in contact with the at least one first layer a) or c).
5 more elements
A method of making a multilayered structure, comprising:
- extruding a foam layer comprising
- a solid composition comprising a blend of LDPE and a linear polyolefin, and
- a gaseous composition comprising a blowing agent;
- extruding a first layer comprising polyethylene;
- and
- assembling a multilayered structure comprising
- b) at least one of the first layer comprising polyethylene, and
- c) at least one of a second layer comprising the foam layer;
- wherein layer b) is in contact with layer c).
6 more elements
Dependencies are inferred from the claim text.