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CA-3166159-C - WATER RESISTANT MATERIALS FOR FOOD-SAFE USES

CA3166159CCA 3166159 CCA3166159 CCA 3166159CCA-3166159-C

Abstract

The present disclosure relates to food safe water resistant articles, which include recyclable cellulosic utensils having a food safe water resistant material. In addition, food safe water resistant composition used for preparing food safe water resistant articles as well as use of the same are also disclosed.

Inventors

  • John T. Mattingly
  • Paul Snowwhite

Assignees

  • JL DARLING LLC

Dates

Publication Date
20260505
Application Date
20210128
Priority Date
20200131

Claims (18)

  1. 41 CLAIMS 1. A food safe article comprising: a paper substrate comprising a plurality of cellulose fibers; and a food safe water resistant material comprising an organo-silicon polymer, wherein the food safe water resistant material impregnantly covers at least a portion of a surface of the paper substrate thereby imparting a wet strength of at least 2,000 Newtons to the paper substrate.
  2. 2. The food safe article of claim 1, wherein the water resistant material further comprises a branched star polymer or a fluorinated polymer.
  3. 3. The food safe article of claim 1, wherein the food safe water resistant material comprises mineral oil, a silicone emulsion, or combinations thereof.
  4. 4. The food safe article of claim 1, wherein the food safe water resistant material comprises 2,4,7,9-tetramethyl-decyn-5-diol or dioctyl sodium sulfosuccinate.
  5. 5. The food safe article of claim 1, wherein the food safe water resistant material comprises a slip agent.
  6. 6. The food safe article of claim 1, wherein the food safe water resistant material comprises a diluent, wetting agent, or surfactant.
  7. 7. The food safe article of claim 1, wherein the food safe water resistant material comprises polyethylene glycol, polypropylene glycol, or combinations thereof. 42
  8. 8. The food safe article of claim 1, wherein a concentration of the food safe water resistant material covering the paper substrate ranges from about 0.5 grams per square meter to about 10.0 grams per square meter of the substrate.
  9. 9. The food safe article of claim 1, wherein the food safe water resistant material has a moisture content less than 10 % by weight based on the total weight of the food safe water resistant material.
  10. 10. The food safe article of claim 1, wherein the food safe water resistant material has a total polymer content of less than 85 % by weight, based on the total weight of the food safe water resistant material.
  11. 11. The food safe article of claim 1, wherein the food safe water resistant material comprises a wax comprising a paraffin wax, a polypropylene-wax mixture, a polyethylene-wax mixture, carnauba wax, microcrystalline wax, montan wax, a Fisher-Tropsch wax, beeswax, or mixtures thereof.
  12. 12. The food safe article of claim 1, wherein the food safe article is a plate, bowl, fork, spoon, knife, straw, cup, cup lid, wrapper, liner, tray, box, container, or container lid.
  13. 13. The food safe article of claim 1, wherein the food safe article is a straw.
  14. 14. Use of a food safe article for consuming, serving, transporting, storing, or disposing of food wherein the food safe article comprises: a paper substrate comprising a plurality of cellulose fibers; and a food safe water resistant material comprising an organo-silicon polymer, wherein the food safe water resistant material impregnantly covering at least a portion of a 43 surface of the paper substrate thereby imparting a wet strength of at least 2,000 Newtons to the paper substrate.
  15. 15. The use of claim 14, wherein the food safe article is a plate, bowl, fork, spoon, knife, straw, cup, cup lid, wrapper, liner, tray, box, container, or container lid.
  16. 16. The use of claim 14, wherein the food safe article is a straw.
  17. 17. A method for preparing a food safe article, the method comprising: i. providing a paper article comprising a plurality of cellulose fibers; and ii. contacting the paper article with a food safe water resistant composition thereby forming a food safe water resistant material comprising an organo-silicon polymer, wherein the food safe water resistant material impregnantly covering at least a portion of a surface of the paper article thereby imparting a wet strength of at least 2,000 Newtons to the paper article.
  18. 18. The method of claim 17, wherein the food safe article is a plate, bowl, fork, spoon, knife, straw, cup, cup lid, wrapper, liner, tray, box, container, or container lid.

Description

WATER RESISTANT MATERIALS FOR FOOD-SAFE USES BACKGROUND Technical Field The present disclosure is directed to water or moisture-resistant paper or 5 paper-containing substrates safe for use as food and beverage containers and utensils, as well as preparation and use of the same Background Various methods are known for treating paper and paper containing materials to impart liquid-repellant or liquid-proof properties. A number of the known 10 methods for treating paper to render it more water-repellent use paper sizing or surface sizing. Various compositions have been described as suitable for surface sizing but are limited with respect to their ability to produce paper that is sufficiently water-repellant or waterproof so as to remain intact and legible when wet. There remains a need in the art for a cellulosic composition (e.g., paper) 15 that is weatherproof and is safe for use with food and beverages. In addition, a need exists for such a composition that can be easily written on with a pen or pencil, can be repulped and recycled, and is compatible with a wide variety paper stocks (particularly recycled stock). Finally, there remains a need in the art for compositions and methods that can provide paper having the above-described properties with water-based materials 20 (i.e., environmentally friendly chemicals) capable of imparting the requisite water resistance and wet strength. The present disclosure fulfills. these needs and provides further related advantages. BRIEF DESCRIPTION Generally, the present disclosure relates to food safe water resistant 25 material in combination with paper or a paper containing material(s). Accordingly, one embodiment provides a food safe article comprising a substrate comprising a plurality of 1 CA 03166159 2022- 7- 26 WO 2021/155062 PCT/0S2021/015577 cellulose fibers, and a food safe water resistant material, wherein the food safe water resistant material impregnantly covers at least a portion of a surface of the substrate. Another embodiment provides use of a food safe article for consuming, serving, transporting, storing, or disposing of food wherein the food safe article comprises 5 a substrate comprising a plurality of cellulose fibers, and a food safe water resistant material, wherein the food safe water resistant material impregnantly covering at least a portion of a surface of the substrate. Yet another embodiment provides a method for preparing a food safe article, the method comprising: 1. providing an article comprising a plurality of cellulose fibers; and 11. contacting the article with a food safe resistant composition thereby forming a food safe water resistant material, wherein the food safe water resistant material impregnantly covering at least a portion of a surface of the substrate These and other aspects of this disclosure will be evident upon reference 15 to the following detailed description of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS In the figures, identical reference numbers identify similar elements or acts. The sizes and relative positions of elements in the figures are not necessarily drawn to scale. For example, the shapes of various elements and angles are not drawn 20 to scale and some of these elements are enlarged and positioned to improve figure legibility. Further, the particular shapes of the elements as drawn, are not intended to convey any information regarding the actual shape of the particular elements, and have been solely selected for ease of recognition in the figures. Figure l is an example illustration showing a substrate comprising a 25 plurality of cellulose fibers and a food safe water resistant material impregnantly covering a surface of the substrate. CA 03166159 2022- 7- 26 Figure 2A shows a straw as an exemplary water resistant article. Figure 2B shows an internal surface and an external surface of a water resistant straw of Figure 2A. 2 WO 2021/155062 PCT/0S2021/015577 Figure 2C shows a paper sheet that may be formed into a water resistant straw of Figure 2A. Figures 3A and 3B show a cup (Figure 3A) and a cup lid (Figure 3B) as exemplary water resistant articles. 5 Figure 4 shows a container with a closeable lid as an exemplary water resistant article. Figure 5 shows a folded take-out container as an exemplary water resistant article. DETAILED DESCRIPTION 10 Food safe water/moisture resistant or water/moisture proof paper or papercontaining substrates, as well as preparation and use thereof, are disclosed herein below. The particulars described herein are hy way of example and are only for purposes of illustrative discussion of embodiments of the present disclosure. The use of any and all examples, or exemplary language (e.g., "such as" or "for example") provided herein is 15 merely intended to better illuminate the disclosure and does not pose a limitation on the scope of the disclosure as claimed. No language in the specification should be construed as indicating any non-claimed element is essential to the p