Film, laminated film, rigid article, package, and method of making film
AssigneeAmcor Flexibles North America, Inc.
InventorsMarcelo B. ELIAS, Otacilio T. BERBERT, Daniel C. MILLER
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Abstract
A film includes a matrix phase including polyethylene in the amount of 75% to 99.5% by weight of the film. The film further includes a dispersion phase including polyester in the amount of 0.5% to 25% by weight of the film. The dispersion phase includes droplets. 90% of the droplets include an average length of 0.2 microns to 5.0 microns. The droplets are dispersed in the matrix phase.
Claims20
(canceled)
The film of claim 17, wherein the film is a coextruded film.
The film of claim 17, wherein the film is a multilayer film.
The film of claim 18, wherein the polyethylene comprises ultra-low-density polyethylene, low density polyethylene, linear low-density polyethylene, medium density polyethylene, linear medium density polyethylene, metallocene low density polyethylene, high density polyethylene, ethylene vinyl acetate copolymer (EVA), or combinations thereof.
The film of claim 17, wherein the chemically incompatible-to-PE polymer comprises polyester and the polyester comprises a melting point from 250° C. to 290° C.
The film of claim 17, further comprising a compatibilizer.
The film of claim 17, wherein the chemically incompatible-to-PE polymer comprises polyester and the polyester comprises post-industrial recycled (PIR) polyester or post-consumer recycled (PCR) polyester.
A laminated film comprising the film of claim 17, the laminated film further comprising a second film laminated to the film, and wherein the film comprises an exposed surface of the laminated film.
A package comprising the film of claim 17.
A laminated film comprising:
- a first film comprising a first layer, a second layer, and a third layer with each layer comprising a first surface and an opposing second surface;
- and
- a second film;
- wherein the first layer and the third layer comprise polyethylene, wherein the second layer comprises a matrix phase comprising polyethylene in the amount of 75% to 99.5% by weight of the first film and a dispersion phase comprising polyester in the amount of 0.5% to 25% by weight of the first film, wherein the dispersion phase comprises droplets, wherein 90% of the droplets comprise an average length of 0.2 microns to 5.0 microns, wherein the droplets are dispersed in the matrix phase, wherein the first layer, the second layer, and the third layer are coextruded with each other and positioned relative to each other in a sequential order, and wherein the second film is laminated to the first film and comprises an exposed surface of the laminated film.
(canceled)
A film comprising:
- a matrix phase comprising polyolefin in the amount of 75% to 99.5% by weight of the film;
- and
- a dispersion phase comprising a chemically incompatible-to-PE polymer in the amount of 0.5% to 25% by weight of the film;
- wherein the dispersion phase comprises droplets;
- wherein 90% of the droplets comprise an average length of 0.2 microns to 5.0 microns;
- and wherein the droplets are dispersed in the matrix phase.
(canceled)
A method of making a film comprising:
- obtaining a polyethylene film comprising from 10% to 15% of a chemically incompatible-to-PE polymer and 85% to 90% polyethylene by weight;
- utilizing a continuous melt filtration pelletizer comprising a filter comprising a plurality of apertures from 5 microns to 150 microns within a temperature range above a melting point of the polyethylene and at least 5% below a melting point of the chemically incompatible-to-PE polymer;
- maintaining the continuous melt filtration pelletizer at a pressure below 112 megapascals (MPa);
- forming a plurality of pellets, wherein each pellet comprises a dispersed phase comprising the chemically incompatible-to-PE polymer in the amount of less than 25% by weight of the pellet, and wherein the dispersed phase comprises droplets comprising an average length from 0.2 microns to 5.0 microns;
- melting the pellets in an extrusion process;
- and
- forming a film that includes a matrix phase comprising polyethylene in the amount of 75% to 99.5% by weight of the film and a dispersion phase comprising the chemically incompatible-to-PE polymer in the amount of 0.5% to 25% by weight of the film;
- wherein the dispersion phase comprises droplets;
- wherein 90% of the droplets comprise an average length of 0.2 microns to 5.0 microns;
- and wherein the droplets are dispersed in the matrix phase.
Dependencies are inferred from the claim text.