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US 2026/0109099 A1Published application
Polypropylene blends for thermoforming
AssigneeAmcor Flexibles North America, Inc.
InventorsTYLER J. THEOBALD, Michael D. PRISCAL, Kevin P. NELSON, Yuan LIU
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Abstract
A thermoformable polymeric film includes a polymeric layer. The polymeric layer includes at least 50% polypropylene by weight, at least 5% tackifier by weight, and from 0.1% to 5% crosslinker by weight. The polypropylene comprises impact polypropylene. The layer comprises at least 5% impact polypropylene by weight.
Claims27
A thermoformable polymeric film comprising a polymeric layer, the polymeric layer comprising:
- at least 50% polypropylene by weight, wherein the polypropylene comprises impact polypropylene and wherein the layer comprises at least 5% impact polypropylene by weight;
- at least 5% tackifier by weight;
- and
- from 0.1% to 5% crosslinker by weight.
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A method for forming a thermoformable film layer, the method comprising:
- blending polypropylene matrix polymer, an impact polypropylene polymer, a tackifier, and a crosslinker;
- and
- forming the film layer from the blend, wherein the film layer comprises:
- at least 50% polypropylene by weight, wherein the polypropylene comprises impact polypropylene and wherein the layer comprises at least 5% impact polypropylene by weight;
- at least 5% tackifier by weight;
- and
- from 0.1% to 5% crosslinker by weight.
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Dependencies are inferred from the claim text.