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AssigneeBio-Tec Biologische Naturverpackungen GmbH
InventorsKishan Khemani, Harald Schmidt, Simon K. Hodson
Estimating the term…
Biodegradable polymer blends suitable for laminate coatings, wraps and other packaging materials are manufactured from at least one “hard” biopolymer and at least one “soft” biopolymer. “Hard” biopolymers tend to be more brittle and rigid and typically have a glass transition temperature greater than about 10° C. “Soft” biopolymers tend to be more flexible and pliable and typically have a glass transition temperature less than about 0° C. While hard and soft polymers each possess certain intrinsic benefits, certain blends of hard and soft polymers have been discovered which possess synergistic properties superior to those of either hard or soft polymers by themselves. Biodegradable polymers include polyesters, polyesteramides, polyesterurethanes, thermoplastic starch, and other natural polymers. The polymer blends may optionally include an inorganic filler. Films and sheets made from the polymer blends may be textured so as to increase the bulk hand feel. Wraps will typically be manufactured to have good “dead-fold” properties so as to remain in a wrapped position and not spring back to an “unwrapped” form.
An article of manufacture that is adapted for use as a food wrap that is both resistant to liquids and biodegradable comprising a biodegradable sheet or film having a single layer formed by extruding, blowing or casting a thermoplastic melt formed from a biodegradable thermoplastic composition that includes:
A sheet or film adapted for use as a food wrap that is both resistant to liquids and biodegradable, wherein the sheet or film is formed by extruding, blowing or casting a thermoplastic melt formed from a biodegradable thermoplastic composition that comprises at least one hydrophobic thermoplastic biodegradable polymer, wherein the sheet or film is textured by a knurled or embossing-type roller so as to have dead-fold of at least about 70%,
A sheet or film adapted for use as a food wrap that is both resistant to liquids and biodegradable, wherein the sheet or film is formed as a single layer by extruding, blowing or casting a thermoplastic melt formed from a biodegradable thermoplastic composition that comprises at least one thermoplastic biodegradable polymer and at least one type of filler particles included in an amount so that the sheet or film has dead-fold of at least about 70%, wherein the sheet or film is water-resistant and biodegradable,
An article of manufacture comprising a single layer biodegradable sheet or film adapted for use as a food wrap that is both resistant to liquids and biodegradable, wherein the sheet or film is formed by extruding, blowing or casting a biodegradable thermoplastic composition that comprises at least one thermoplastic biodegradable polymer and at least one type of filler particles, wherein at least a portion of the filler particles protrude from a surface of the sheet or film,
An article of manufacture comprising a single layer film or sheet formed by extrusion, blowing or casting a thermoplastic melt formed from a biodegradable thermoplastic composition comprising:
Dependencies are inferred from the claim text.