Biopolymer roll stock for form-fill-sealed article
View Patent ↗A system and method for forming a biopolymer roll stock for a biopolymer form-fill-sealed package, the biopolymer roll stock includes at least one biopolymer resin; and at least one additive, the additive including at least one impact modifier between 5-50 weight % of the total weight of the additive; and at least one polymer color concentrate between 5-50 weight % of the total weight of the additive, whereby the biopolymer roll stock has a predetermined thickness and impact resistance.
1. A biopolymer roll stock, the biopolymer roll stock comprising:
at least one biopolymer resin present in an amount between 80 and 90 weight % of the total weight of the biopolymer roll stock, wherein the biopolymer resin is polylactic acid polymer (PLA); and
at least one ethylene copolymer resin impact modifier present in an amount between 5 and 10 weight % of the total weight of the roll stock;
at least one carrier resin present in an amount between 5 and 10 weight % of the total weight of the roll stock, wherein the at least one carrier resin comprises an aliphatic-aromatic polyester.
2. The biopolymer roll stock of claim 1 , wherein the biopolymer roll stock is comprised of at least two layers of materials.
3. The biopolymer roll stock of claim 2 wherein the at least two layers of materials are comprised of the same material.
4. The biopolymer roll stock of claim 2 , wherein the at least two layers of materials are comprised of different materials.
5. The biopolymer roll stock of claim 2 , wherein the at least two layers of materials are different biopolymer materials.
6. The biopolymer roll stock of claim 2 wherein the at least two layers of materials are comprised of biopolymer material and non-biopolymer material.
7. The biopolymer roll stock of claim 1 further comprising joining the biopolymer sheeting to at least one other sheeting material.
8. The biopolymer roll stock of claim 1 , wherein the predetermined impact resistance has a Gardner Impact value greater than 3 in-lbs but less than about 30 in-lbs.
9. The biopolymer roll stock of claim 1 , wherein the predetermined impact resistance has a Gardner Impact value of about 17 in-lbs @ 30 MILs.
10. The biopolymer roll stock of claim 1 , wherein the predetermined temperature forming window is between 220.degree. F. and 275.degree. F.
11. The biopolymer roll stock of claim 1 , wherein the predetermined depth to width ratio is between 10:1 to 1:4.
12. The biopolymer roll stock of claim 1 , wherein the predetermined depth to width ratio is between 10:1 to 2:1.
13. The biopolymer roll stock of claim 1 , wherein the predetermined depth to width ratio is between 8:1 to 4:1.
14. The biopolymer roll stock of claim 1 , wherein the predetermined depth to width ratio is between 2:1 to 1:4.
15. The biopolymer roll stock of claim 1 having a predetermined thickness of between about 10 mils and about 80 mils.
16. The biopolymer roll stock of claim 1 having at least one of a predetermined thickness between about 10 mils and about 80 mils, an impact resistance greater than about 3 in-lbs but less than about 30 in lbs.