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METHODS OF MAKING FILMS HAVING TARGET BETA RATIOS AND TARGET PERMEABILITIES
METHODS OF MAKING FILMS HAVING TARGET BETA RATIOS AND TARGET PERMEABILITIES
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机译:具有目标Beta比率和目标磁导率的影片制作方法
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摘要
The present invention provides methods of making films and methods of making packages. In one aspect, a method of making a film having a beta ratio and a permeability comprises: (a) selecting a polyolefin, the polyolefin comprising low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, polyolefin elastomer, polyolefin plastomer, or a combination thereof; (b) identifying a target beta ratio and a target oxygen permeability for the film; (c) selecting one or more additives based on the target beta ratio, the one or more additives comprising calcium carbonate, carbon black, ethylene vinyl acetate, or a combination thereof; (d) determining an amount of the selected additive(s) based on the target beta ratio and the target oxygen permeability; and (e) forming a film comprising the polyolefin and the selected additive(s), wherein the film has the target beta ratio and the target oxygen permeability.
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