Method for improving hot tack in blown polyethylene films
AssigneeExxon Research & Engineering Co.
InventorArnold Lustiger
Life of this patent
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Abstract
The invention is directed towards a method for improving hot tack in blown polyethylene films. Accordingly, a nucleating agent and polyethylene are combined to form a melt from which the film is blown. The method comprises forming a melt of polyethylene and a nucleating agent selected from the group consisting of dibenzylidene sorbitol, paramethyldibenzylidene sorbitol, dimethyldibenzylidene sorbitol, ethylene copolymers containing grafted maleic anhydride, ethylene copolymers containing grafted acrylic acid, and mixtures thereof. Polyethylene films having increased hot tack can be blown therefrom.
Claims5
A method for making polyethylene film having improved hot tack seal properties, the method comprising the steps of:
- (a) forming a composition comprising a polyethylene resin and a nucleating agent selected from the group consisting of dibenzylidene sorbitol, paramethyldibenzylidene sorbitol, dimethyldibenzylidene sorbitol, ethylene copolymers containing grafted maleic anhydride, ethylene copolymers containing grafted acrylic acid, and mixtures thereof;
- (b) melt-homogenizing said composition;
- and (c) forming a blown film, wherein said blown film has improved hot seal properties in terms of increased failure strength value compared to a film without said nucleating agent.
Dependencies are inferred from the claim text.