Multilayer films containing a slip agent
AssigneesDow Global Technologies LLC, PBBPolisur S.R.L.
InventorsSilvina Vanesa D'Agosto, Nicolas Cardoso Mazzola, Marcelo Delmar Cantu, Jorge Caminero Gomes
Life of this patent
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Abstract
The present disclosure provides a multilayer film containing at least three layers, including (A) a core layer containing a high density polyethylene (HDPE) having a density from 0.940 g/cc to 0.980 g/cc; and (B) skin layers on opposite sides of the core layer. Each skin layer includes (i) a propylene/ethylene copolymer with from greater than 0 wt % to 5 wt % units derived from ethylene comonomer; (ii) from 3,000 to 3,500 ppm of a slip agent; and (iii) from 4,000 to 10,000 ppm of an antiblock agent.
Claims18
A multilayer film consisting of three layers:
- (A) a core layer comprising from 97 wt % to 100 wt % of a high density polyethylene (HDPE) having a density from 0.940 g/cc to 0.980 g/cc, and from 3 wt % to 0 wt % of an additive;
- (B) skin layers on opposite sides of the core layer, each skin layer is an outermost layer and comprises
- (i) a propylene/ethylene copolymer with from greater than 0 wt % to 5 wt % units derived from ethylene comonomer;
- (ii) from 3,000 to 3,500 ppm of a slip agent;
- and
- (iii) from 4,000 to 10,000 ppm of an antiblock agent;
- the multilayer film having a coefficient of friction (COF) from 0.05 to 0.35 and a twist retention after 7 days from 66% to 100%.
An article comprising:
- a confectionary;
- a multilayer film in contact with the confectionary, the multilayer film consisting of three layers
- (A) from 40 vol % to 90 vol % of a core layer comprising from 97 wt % to 100 wt % of a high density polyethylene (HDPE) having a density from 0.940 g/cc to 0.980 g/cc, and from 3 wt % to 0 wt % of an additive;
- (B) from 10 vol % to 60 vol % of skin layers on opposite sides of the core layer, vol % based on total volume of the multilayer film, each skin layer comprising
- (i) a propylene/ethylene copolymer with from greater than 0 wt % to 5 wt % units derived from ethylene comonomer;
- (ii) from 3,000 to 3,500 ppm of a slip agent;
- and
- (iii) from 4,000 to 10,000 ppm of an antiblock agent;
- the multilayer film having a coefficient of friction (COF) from 0.05 to 0.35 and a twist retention after 7 days from 66% to 100%.
Dependencies are inferred from the claim text.