Reducing surface and bulk contamination in plastic
US-11628379-B2 · Apr 18, 2023 · US
US12319038B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12319038-B2 |
| Application number | US-202117539527-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 1, 2021 |
| Priority date | Dec 1, 2021 |
| Publication date | Jun 3, 2025 |
| Grant date | Jun 3, 2025 |
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A package containing polyolefin film having between about 10% and about 95%, by weight of the polyolefin film, of recycled polyolefin is described. The polyolefin film has an Average Hole Count between about 0.0 and about 10.0, according to the Gel Count Test Method. The polyolefin film has an Average Gel Count between about 0.0 and about 100.0, according to the Gel Count Test Method. The polyolefin film has an Average Relative Gel Height between about 0.0% and about 150.0%. The polyolefin film has a Total Spot Count between about 0.0 and about 100.0, according to the Gel Count Test Method.
Opening claim text (preview).
What is claimed is: 1. A package comprising: a polyolefin film comprising virgin polyolefin and a recycled polyolefin, and a consumer product; wherein the polyolefin film comprises a first surface and a second surface; wherein the polyolefin film comprises from about 10% to about 95%, by weight of the polyolefin film, of the recycled polyolefin; wherein the recycled polyolefin is from a high-custody sourced feedstock of post-consumer recycled polyolefin material selected to comprise: (a) from <LOQ to 1000 μg/kg isononylphenol, according to a Trace Chemicals Test Method; (b) from <LOQ to 75 ng/kg PCB 77, according to the Trace Chemicals Test Method; (c) from <LOQ to 2000 ng/kg PCB 118, according to the Trace Chemicals Test Method; (d) from <LOQ to 45 ng/kg OCDD, according to the Trace Chemicals Test Method: (e) from <LOQ to 1.8 ng/kg OCDF, according to the Trace Chemicals Test Method; (f) from <LOQ to 2500 μg/kg bisphenol A, according to the Trace Chemicals Test Method; and (g) from <LOQ to 1000 μg/kg diisononyl phthalate, according to the Trace Chemicals Test Method; wherein the polyolefin film has an Average Hole Count less than 10.0, according to a Gel Count Test Method; wherein the polyolefin film has an Average Gel Count less than 25.0, according to the Gel Count Test Method; wherein the polyolefin film has an Average Relative Gel Height from about 0.0% to about 50.0%, according to the Gel Count Test Method; wherein the polyolefin film has a Total Spot Count between about 0.0 and about less than 100.0, according to the Gel Count Test Method; and wherein the polyolefin film at least partially encloses the consumer product. 2. The package of claim 1 , wherein the first surface of the polyolefin film comprises printed graphics. 3. The package of claim 1 , wherein the second surface of the polyolefin film is devoid of printed graphics. 4. The package of claim 1 , wherein the first surface of the polyolefin film forms an inner surface facing toward the consumer product, and wherein the second surface of the polyolefin forms an outer surface facing away from the consumer product. 5. The package of claim 1 , wherein the recycled polyolefin consists of the high-custody sourced feedstock of the post-consumer polyolefin material. 6. The package of claim 1 , wherein the consumer product comprises at least one of: diapers, wipes, absorbent pants, paper towel, toilet paper, facial tissue, or absorbent underwear. 7. The package of claim 1 , wherein the virgin polyolefin is virgin LDPE, and wherein the post-consumer recycled polyolefin material is post-consumer recycled LDPE. 8. The package of claim 1 , wherein the high-custody sourced post-consumer polyolefin resin feedstock comprises from 1.0 ng/kg PCB 77 to 75 ng/kg PCB 77 and from 1.0 ng/kg to 2000 ng/kg PCB 118, according to the Trace Chemicals Test Method. 9. The package of claim 1 , wherein the high-custody sourced feedstock is a cleaned feedstock from which contaminants that are not polyolefin material have been removed. 10. The package of claim 1 , wherein the first surface of the polyolefin film forms an outer surface facing away from the consumer product, and wherein the second surface of the polyolefin film forms an inner surface facing toward the consumer product. 11. The package of claim 10 , wherein the polyolefin film has an Inner Surface Spot Count from about 0.0 to about 100.0, according to the Gel Count Test Method. 12. A package comprising: a polyolefin film comprising a virgin LDPE and a recycled LDPE, and a consumer product disposed within the polyolefin film; wherein the polyolefin film comprises a first surface facing away from the consumer product and a second surface facing toward the consumer product; wherein the polyolefin film comprises from about 10% to about 95%, by weight of the polyolefin film, of the recycled LDPE, wherein the recycled LDPE is from a high-custody sourced feedstock of post-consumer recycled LDPE material selected to comprise: (a) from <LOQ to 1000 μg/kg isononylphenol, according to a Trace Chemicals Test Method; (b) from <LOQ to 75 ng/kg PCB 77, according to the Trace Chemicals Test Method; (c) from <LOQ to 2000 ng/kg PCB 118, according to the Trace Chemicals Test Method: (d) from <LOQ to 45 ng/kg OCDD, according to the Trace Chemicals Test Method; (e) from <LOQ to 1.8 ng/kg OCDF, according to the Trace Chemicals Test Method; (f) from <LOQ to 2500 μg/kg bisphenol A, according to the Trace Chemicals Test Method; and (g) from <LOQ to 1000 μg/kg diisononyl phthalate, according to the Trace Chemicals Test Method; wherein the polyolefin film has an Average Hole Count less than 10.0, according to a Gel Count Test Method; wherein the polyolefin film has an Average Gel Count less than 100.0, according to the Gel Count Test Method; and wherein the polyolefin film has a Total Spot Count of less than 100.0, according to the Gel Count Test Method. 13. The package of claim 12 , wherein the polyolefin film has an Average Gel Height of about 0.00 mm to about 150.00 mm, according to the Gel Count Test Method. 14. The package of claim 12 , wherein the polyolefin film has an Average Relative Gel Height from about 0.0% to about 150.0%, according to the Gel Count Test Method. 15. The package of claim 12 , wherein the recycled polyolefin consists of the high-custody sourced feedstock of the post-consumer polyolefin LDPE material. 16. The package of claim 12 , wherein the high-custody sourced post-consumer polyolefin resin feedstock comprises from 1.0 ng/kg PCB 77 to 75 ng/kg PCB 77 and from 1.0 ng/kg to 2000 ng/kg PCB 118, according to the Trace Chemicals Test Method. 17. The package of claim 12 , wherein the high-custody sourced feedstock is a cleaned feedstock from which contaminants that are not polyolefin material have been removed. 18. A package comprising: a polyolefin film, and a consumer product; wherein the polyolefin film comprises a first surface and a second surface, wherein the first surface forms an outer surface facing away from the consumer product, and wherein the second surface forms an inner surface facing toward the consumer product; wherein the polyolefin film comprises from about 25% and to about 95%, by weight of the polyolefin film, of a recycled polyolefin from a high-custody sourced feedstock of post-consumer recycled polyolefin material selected to comprise: (a) from <LOQ to 1000 μg/kg isononylphenol, according to a Trace Chemicals Test Method; (b) from <LOQ to 75 ng/kg PCB 77, according to the Trace Chemicals Test Method: (c) from <LOQ to 2000 ng/kg PCB 118, according to the Trace Chemicals Test Method: (d) from <LOQ to 45 ng/kg OCDD, according to the Trace Chemicals Test Method; (e) from <LOQ to 1.8 ng/kg OCDF, according to the Trace Chemicals Test Method; (f) from <LOQ to 2500 μg/kg bisphenol A, according to the Trace Chemicals Test Method; and (g) from <LOQ to 1000 μg/kg diisononyl phthalate, according to the Trace Chemicals Test Method; wherein the polyolefin film has an Average Hole Count of from about 0.0 to about 10.0, according to a Gel Count Test Method; wherein the polyolefin film has an Average Gel Count from about 0.0 to about 100.0, according to the Gel Count Test Method; wherein the polyolefin film has an Average Gel Height from about 0.00 mm to about 150.00 mm, according to the Gel Count Test Method; wherein the polyolefin film has an Inner Surface Spot Count of from about 0.0 to about 100.0 and/or an Outer Surface Spot Count of from about 0.0 to about 100.0, according to the Gel Co
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