Aluminum alloys for food ends of food packaging and methods for preparing the same

Abstract

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Description

ALUMINUM ALLOYS FOR FOOD ENDS OF FOOD PACKAGING AND METHODSFOR PREPARING THE SAMEREFERENCE TO RELATED APPLICATION

[0001] This application claims benefit of U.S. Provisional Patent Application No. 63 / 623,571, filed on January 22, 2024, which is hereby incorporated by reference in their entireties for all purposes.FIELD

[0002] The present disclosure relates to the fields of metallurgy, aluminum alloys, aluminum fabrication, and related fields. In particular, the present disclosure provides recycle-friendly aluminum alloys for producing food packaging and food ends for storing food products (e.g., fruits, vegetables, proteins, cheese, pet food).BACKGROUND

[0003] Conventional food packaging is produced from 5xxx series aluminum alloys. For example, food body and food ends for food packaging are typically made from 5xxx series aluminum alloys. In general, aluminum alloys for producing food ends require greater strength than food body. As a result, food ends are often fabricated from 5xxx series aluminum alloys comprising high amounts of magnesium (Mg) for strengthening. For instance, food ends for food packaging can be fabricated from a highly engineered AA5006, AA5352, or AA5052 aluminum alloy. However, these alloys comprise high amounts of Mg, low amounts of recycled aluminum alloy scrap, and a high content of prime aluminum due to the alloy’s strictly controlled composition. Therefore, conventional food packaging has limited recycling ability (e.g., ability to use recycled aluminum alloy scrap to produce alloy) and there is little commonality in used beverage can (UBC) composition to make new aluminum alloys for food packaging. Therefore, if recycled aluminum alloy scrap is used to produce new aluminum alloys, there is a need to add primary aluminum and additional alloying elements to adjust the composition to produce aluminum alloys for food packaging. Such additions reduce the circularity of recycled aluminum alloy products for producing new aluminum alloys and requires the addition of primary aluminum, which decreases the recycled content. Moreover, additional primary aluminum increases the carbon dioxide production, leading to environmental harm and high costs.SUMMARY

[0004] Covered embodiments of the present disclosure are defined by the claims, not this summary. This summary is a high-level overview of various aspects of the invention and introduces some of the concepts that are further described in the Detailed Description section below. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used in isolation to determine the scope of the claimed subject matter. The subject matter should be understood by reference to appropriate portions of the entire specification, any or all drawings and each claim.

[0005] Described herein are aluminum alloys that provide a cost-effective and recycle-friendly alternative to the use of 5xxx series aluminum alloys for food packaging. In some embodiments, the present disclosure relates to an aluminum alloy for a food packaging end, the aluminum alloy comprising up to 0.50 wt. % Si, up to 0.80 wt. % Fe, up to 0.30 wt. % Cu, up to 1.20 wt. % Mn, up to 1.30 wt. % Mg, up to 0.20 wt. % Zn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al. In some embodiments, the aluminum alloy comprises 0.05 - 0.40 wt. % Si, 0.10 - 0.70 wt. % Fe, 0.01 - 0.25 wt. % Cu, 0.25 - 1.10 wt. % Mn, 0.50 - 1.20 wt. % Mg, up to 0.15 wt. % Zn, up to 0.15 wt. % Cr, up to 0.15 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al. In some embodiments, the aluminum alloy comprises 0.10 - 0.40 wt. % Si, 0.20 - 0.70 wt. % Fe, 0.05 - 0.25 wt. % Cu, 0.50 - 1.10 wt. % Mn, 0.60 - 1.20 wt. % Mg, up to 0.15 wt. % Zn, up to 0.15 wt. % Cr, up to 0.15 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al. In some embodiments, the aluminum alloy comprises 0.20 - 0.40 wt. % Si, 0.30 - 0.60 wt. % Fe, 0.05 - 0.20 wt. % Cu, 0.75 - 1.10 wt. % Mn, 0.80 - 1.20 wt. % Mg, up to 0.10 wt. % Zn, up to 0.10 wt. % Cr, up to 0.10 wt. % Ti, up to 0.10 wt. % impurities, and remainder Al. In some embodiments, the aluminum alloy comprises 0.20 - 0.30 wt. % Si, 0.40 - 0.60 wt. % Fe, 0.10 - 0.20 wt. % Cu, 0.80 - 1.00 wt. % Mn, 1.00 - 1.20 wt. % Mg, up to 0.05 wt. % Zn, up to 0.05 wt. % Cr, up to 0.05 wt. % Ti, up to 0.05 wt. % impurities, and remainder Al. In some embodiments, the aluminum alloy has a yield strength from 150 MPa to 300 MPa. In some embodiments, the aluminum alloy has an ultimate tensile strength from 200 MPa to 350 MPa. In some embodiments, the aluminum alloy has an elongation from 3 % to 20 %. In some embodiments, a food end comprises the aluminum alloy described herein. In some embodiments, the food end has a gaugethickness from 0.001 mm to 0.01 mm. In some embodiments, a food body comprising the aluminum alloy described herein.

[0006] In some embodiments, the present disclosure relates to a food packaging comprising a food end and a food body, wherein the food end comprises an aluminum alloy comprising up to 0.50 wt. % Si, up to 0.80 wt. % Fe, up to 0.30 wt. % Cu, up to 1.20 wt. % Mn, up to 1.30 wt. % Mg, up to 0.20 wt. % Zn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al, wherein the food packaging is configured to store food products. In some embodiments, the food body comprises a 3xxx series aluminum alloy. In some embodiments, the 3xxx series aluminum alloy comprises a AA3104 aluminum alloy. In some embodiments, the food body comprises the same aluminum alloy as the food end. In some embodiments, the food end has a gauge thickness from 0.001 mm to 0.01 mm. In some embodiments, the food packaging is configured to withstand an internal pressure of up to 0.50 MPa. In some embodiments, the food packaging is configured to withstand an internal pressure of up to 0.11 MPa. In some embodiments, the food end comprises a coating with a thickness from 1500 mg / m2to 3100 mg / m2. In some embodiments, the food end has a gauge thickness from 0.001 mm to 0.01 mm, wherein the food packaging is configured to withstand an internal pressure of up to 0.15 MPa, and wherein the food packaging is configured to receive a food product.

[0007] Further aspects, objects, and advantages will become apparent upon consideration of the detailed description and figures that follow.DETAILED DESCRIPTION

[0008] Described herein are novel aluminum alloys for producing food packaging (e.g., food body and food ends). Specifically, described herein is an aluminum alloy composition that can be used to produce both food body and food end, which improves recyclability of food packaging. The aluminum alloy provides a significant advantage because it is nearly 100% recyclable, unlike current materials used for food packaging, such as food packaging including different 5xxx series aluminum alloys for food ends. Additionally, the aluminum alloy described herein provides a cost- effective alternative to the use of 5xxx series aluminum alloys for food packaging. In some embodiments, the present disclosure provides a single aluminum alloy composition for food end and food body. In some embodiments, food packaging produced from the aluminum alloysdescribed herein are particularly well-suited to receive food products (e.g., fruits, vegetables, proteins, cheese, pet food).

[0009] Conventional food packaging produced from aluminum alloys include two parts - the food body and the food end. For food packaging, the food body and food end are typically produced from the same or different 5xxx series aluminum alloys. 5xxx series aluminum alloys are difficult to process and have low recoveries from recycling (e.g., less than 70 % recovery). Additionally, 5xxx series aluminum alloys typically have a high prime content (e.g., greater than 70% prime aluminum) due to their high Mg content and strictly controlled composition to achieve high strength and formability. Therefore, food packaging comprising 5xxx series aluminum alloys have limited capacity to incorporate recycled aluminum alloy scrap materials, and requires the addition of primary aluminum thereby increasing carbon dioxide production leading to environmental harm and high costs.

[0010] The food packaging described herein comprises an aluminum alloy having high recycle content thereby reducing costs and reducing carbon dioxide production. In some embodiments, the food packaging described herein comprises a 3xxx series aluminum alloy. For example, the food packaging may comprise a food body and a food end comprising a 3xxx series aluminum alloy. In some embodiments, the 3xxx series aluminum alloy is a modified AA3104 aluminum alloy. Beneficially, 3xxx series aluminum alloys for producing food packaging is easier to process and has higher recoveries than 5xxx series aluminum alloys (e.g., greater than 70 % recovery). The inventors have found that by modifying the composition of a 3xxx series aluminum alloy and by using specific processing steps, the 3xxx series aluminum alloys described herein can achieve a good balance of strength and formability despite the increased amount of particles from recycled aluminum alloy scrap. By utilizing 3xxx series aluminum alloys to produce food packaging and replacing 5xxx series aluminum alloys, the amount of prime aluminum can be reduced by 50 % or greater, which is the major contributor for CO2 emissions.Definitions and Descriptions

[0011] As used herein, the terms “invention,” “the invention,” “this invention” and “the present invention” are intended to refer broadly to all of the subj ect matter of this patent application and the claims below. Statements containing these terms should be understood not to limit the subject matter described herein or to limit the meaning or scope of the patent claims below.

[0012] In this description, reference is made to alloys identified by aluminum industry designations, such as “series” or “5xxx .” For an understanding of the number designation system most commonly used in naming and identifying aluminum and its alloys, see “International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys,” or “Registration Record of Aluminum Association Alloy Designations and Chemical Compositions Limits for Aluminum Alloys in the Form of Castings and Ingot,” both published by The Aluminum Association.

[0013] As used herein, the meaning of “a,” “an,” or “the” includes singular and plural references unless the context clearly dictates otherwise.

[0014] As used herein, a plate generally has a thickness of greater than 15 mm. For example, a plate may refer to an aluminum product having a thickness of greater than 15 mm, greater than 20 mm, greater than 25 mm, greater than 30 mm, greater than 35 mm, greater than 40 mm, greater than 45 mm, greater than 50 mm, or greater than 100 mm.

[0015] As used herein, a shate (also referred to as a sheet plate) generally has a thickness of from 4 mm to 15 mm. For example, a shate may have a thickness of 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, or 15 mm.

[0016] As used herein, a sheet generally refers to an aluminum product having a thickness of less than 4 mm (e.g., less than 3 mm, less than 2 mm, less than 1 mm, less than 0.5 mm, less than 0.3 mm, or less than 0.1 mm). For example, a sheet may have a thickness of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5, 0.6 mm 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm,1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm,2.6 mm 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, or 4 mm.

[0017] As used herein, formability refers to the ability of a material to undergo deformation into a desired shape without fracturing, tearing-off, necking, earing, or shaping errors such as wrinkling, spring-back, or galling occurring. In engineering, formability may be classified according to deformation modes. Examples of deformation modes include drawing, stretching, bending, and stretch-flanging.

[0018] As used herein, primary aluminum refers to an aluminum material including at least 99.7 wt. % aluminum. Primary aluminum is produced from the prime transformation of rawmaterial into aluminum (e.g., processing of bauxite into alumina and electrolysis of alumina into aluminum).

[0019] As used herein, yield stress (also referred to as yield strength) refers to the point at which an aluminum alloy begins to plastically deform and can no longer return to its original state.

[0020] Reference may be made in this application to alloy temper or condition. For an understanding of the alloy temper descriptions most commonly used, see “American National Standards (ANSI) H35 on Alloy and Temper Designation Systems.” An F condition or temper refers to an aluminum alloy as fabricated. An O condition or temper refers to an aluminum alloy after annealing. An Hxx condition or temper, also referred to herein as an H temper, refers to a non-heat treatable aluminum alloy after cold rolling with or without thermal treatment (e.g., annealing). Suitable H tempers include HX1, HX2, HX3 HX4, HX5, HX6, HX7, HX8, or HX9 tempers. A T1 condition or temper refers to an aluminum alloy cooled from hot working and naturally aged (e.g., at room temperature). A T2 condition or temper refers to an aluminum alloy cooled from hot working, cold worked and naturally aged. A T3 condition or temper refers to an aluminum alloy solution heat treated, cold worked, and naturally aged. A T4 condition or temper refers to an aluminum alloy solution heat treated and naturally aged. A T5 condition or temper refers to an aluminum alloy cooled from hot working and artificially aged (at elevated temperatures). A T6 condition or temper refers to an aluminum alloy solution heat treated and artificially aged. A T7 condition or temper refers to an aluminum alloy solution heat treated and artificially overaged. A T8x condition or temper refers to an aluminum alloy solution heat treated, cold worked, and artificially aged. A T9 condition or temper refers to an aluminum alloy solution heat treated, artificially aged, and cold worked. A W condition or temper refers to an aluminum alloy after solution heat treatment.

[0021] As used herein, the meaning of “room temperature” can include a temperature of from 15 °C to 30 °C, for example 15 °C, 16 °C, 17 °C, 18 °C, 19 °C, 20 °C, 21 °C, 22 °C, 23 °C, 24 °C, 25 °C, 26 °C, 27 °C, 28 °C, 29 °C, or 30 °C.

[0022] All ranges disclosed herein are to be understood to encompass both endpoints and any and all subranges subsumed therein. For example, a stated range of “1 to 10” should be considered to include any and all subranges between (and inclusive of) the minimum value of 1 and the maximum value of 10; that is, all subranges beginning with a minimum value of 1 or more, e.g. 1 to 6.1, and ending with a maximum value of 10 or less, e.g., 5.5 to 10.

[0023] The following aluminum alloys are described in terms of their elemental composition in weight percentage (wt. %) based on the total weight of the alloy. In certain examples of each alloy, the remainder is aluminum, with a maximum wt. % of 0. 15 % for the sum of the impurities.Aluminum Alloys for Food packaging

[0024] Aluminum alloy properties are partially determined by the composition of the aluminum alloy. In certain aspects, the alloy composition may influence or even determine whether the alloy will have properties adequate for a desired application.

[0025] The alloys described herein are novel aluminum alloys. The properties of the alloys are achieved at least in part due to the elemental composition of the alloys. In some embodiments, the aluminum alloy described herein is a 3xxx series aluminum alloy. Suitable 3xxx series aluminum alloys for producing the aluminum alloys described herein include, for example, AA3002, AA3102, AA3003, AA3103, AA31O3A, AA3103B, AA3203, AA3403, AA3004, AA3004A, AA3104, AA3204, AA3304, AA3OO5, AA3OO5A, AA3105, AA31O5A, AA3105B, AA3007, AA3107, AA3207, AA3207A, AA3307, AA3009, AA3010, AA3110, AA3011, AA3012, AA3012A, AA3O13, AA3014, AA3O15, AA3016, AA3017, AA3019, AA3020, AA3021, AA3025, AA3026, AA3030, AA3130, and AA3065. In some embodiments, the aluminum alloy is a modified AA3104 aluminum alloy.

[0026] In some embodiments, the aluminum alloys provided in Tables 1-5 can replace 5xxx series aluminum alloys, such as AA5052 aluminum alloys, for food ends. In some embodiments, the aluminum alloy is a variant of AA3104 aluminum alloy. Advantageously, by replacing food ends made from 5xxx series aluminum alloys with food ends made from the aluminum alloys described herein, the prime aluminum content can be reduced by 30 % to 50 %.

[0027] In some examples, an aluminum alloy as described herein can have the following elemental composition as provided in Table 1.Table 1

[0028] In some examples, the aluminum alloy as described herein can have the following elemental composition as provided in Table 2.Table 2

[0029] In some examples, the aluminum alloy as described herein can have the following elemental composition as provided in Table 3.Table 3

[0030] In some examples, the aluminum alloy can have the following elemental composition as provided in Table 4.Table 4

[0031] In some examples, the aluminum alloy can have the following elemental composition as provided in Table 5.Table 5Silicon (Si)

[0032] In some examples, the aluminum alloy described herein includes Si in an amount of up to 0.50 % (e.g., from 0.05 % to 0.40 %, from 0. 10 % to 0.40 %, from 0.20 % to 0.40 %, or from 0.20 % to 0.35 %) based on the total weight of the alloy. For example, the alloy can include 0.01%, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, 0.20 %, 0.21 %, 0.22 %, 0.23 %, 0.24%, 0.25 %, 0.26 %, 0.27 %, 0.28 %, 0.29 %, 0.30 %, 0.31%, 0.32%, 0.33 %, 0.34%, 0.35 %, 0.36%, 0.37 %, 0.38 %, 0.39 %, 0.40 %, 0.41 %, 0.42 %, 0.43 %, 0.44 %, 0.45 %, 0.46 %, 0.47 %,0.48 %, 0.49 %,or 0.50 % Si. All expressed in wt. %.Iron (Fe)

[0033] In some examples, the aluminum alloy described herein also includes Fe in an amount of up to 0.80 % (e.g., from 0.10 % to 0.70 %, from 0.20 % to 0.70 %, from 0.30 % to 0.65 %, or from 0.40 % to 0.65 %) based on the total weight of the alloy. For example, the alloy can include 0.01 %, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %, 0.13%, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, 0.20 %, 0.21 %, 0.22 %, 0.23 %, 0.24 %0.25 %, 0.26 %, 0.27 %, 0.28 %, 0.29 %, 0.30 %, 0.31 %, 0.32 %, 0.33 %, 0.34 %, 0.35 %, 0.36%, 0.37 %, 0.38 %, 0.39 %, 0.40 %, 0.41 %, 0.42 %, 0.43 %, 0.44 %, 0.45 %, 0.46 %, 0.47 %,0.48 %, 0.49 %, 0.50 %, 0.51 %, 0.52 %, 0.53 %, 0.54 %, 0.55 %, 0.56 %, 0.57 %, 0.58 %, 0.59%, 0.60 %, 0.61 %, 0.62 %, 0.63 %, 0.64 %, 0.65 %, 0.66 %, 0.67 %, 0.68 %, 0.69 %, 0.70 %,0.71 %, 0.72 %, 0.73 %, 0.74 %, 0.75 %, 0.76 %, 0.77 %, 0.78 %, 0.79 %, or 0.80 % Fe. All expressed in wt. %.Copper (Cu)

[0034] In some examples, the aluminum alloy described herein includes Cu in an amount up to 0.30 % (e.g., from 0.01 % to 0.25 %, from 0.05 % to 0.25 %, from 0.05 % to 0.20 %, or from0.10 % to 0.23 %) based on the total weight of the alloy. For example, the alloy can include 0.01%, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %.0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, 0.20 %, 0.21 %, 0.22 %, 0.23 %, 0.24%, 0.25 %, 0.26 %, 0.27 %, 0.28 %, 0.29 %, or 0.30 % Cu. All expressed in wt. %.Manganese (Mn)

[0035] In some examples, the aluminum alloy described herein can include Mn in an amount up to 1.20 % (e.g., from 0.25 % to 1.10 %, 0.50 % to 1.10 %, from 0.75 % to 1.10 %, from 0.50% to 0.90 %, from 0.80 % to 1.00 %, or from 0.90 % to 1.00 %) based on the total weight of the alloy. For example, the alloy can include 0.01 %, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07%, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %, 0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %0.19 %, 0.20 %, 0.21 %, 0.22 %, 0.23 %, 0.24 %, 0.25 %, 0.26 %, 0.27 %, 0.28 %, 0.29 %, 0.30%, 0.31 %, 0.32 %, 0.33 %, 0.34 %, 0.35 %, 0.36 %, 0.37 %, 0.38 %, 0.39 %, 0.40 %, 0.41 %0.42 %, 0.43 %, 0.44 %, 0.45 %, 0.46 %, 0.47 %, 0.48 %, 0.49 %, 0.50 %, 0.51 %, 0.52 %, 0.53%, 0.54 %, 0.55 %, 0.56 %, 0.57 %, 0.58 %, 0.59 %, 0.60 %, 0.61 %, 0.62 %, 0.63 %, 0.64 %,0.65 %, 0.66 %, 0.67 %, 0.68 %, 0.69 %, 0.70 %, 0.71 %, 0.72 %, 0.73 %, 0.74 %, 0.75 %, 0.76%, 0.77 %, 0.78 %, 0.79 %, 0.80 %, 0.81 %, 0.82 %, 0.83 %, 0.84 %, 0.85 %, 0.86 %, 0.87 %,0.88 %, 0.89 %, 0.90 %, 0.91 %, 0.92 %, 0.93 %, 0.94 %, 0.95 %, 0.96 %, 0.97 %, 0.98 %, 0.99%, 1.00 %, 1.01 %, 1.02 %, 1.03 %, 1.04 %, 1.05 %, 1.06 %, 1.07 %, 1.08 %, 1.09 %, 1.10 %,1.11 %, 1.12 %, 1.13 %, 1.14 %, 1.15 %, 1.16 %, 1.17 %, 1.18 %, 1.19 %, or 1.20 % Mn. All expressed in wt. %.Magnesium (Mg)

[0036] In some examples, the aluminum alloy described herein can include Mg in an amount up to 1.30 % (e.g., from 0.50 % to 1.20 %, from 0.60 % to 1.20 %, from 0.80 % to 1.20 %, from 1.00 % to 1.20 %, or from 1.00 % to 1.25 %) based on the total weight of the alloy. For example, the alloy can include 0.01 %, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %, 0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, 0.20 %, 0.21%, 0.22 %, 0.23 %, 0.24 %, 0.25 %, 0.26 %, 0.27 %, 0.28 %, 0.29 %, 0.30 %, 0.31 %, 0.32 %,0.33 %, 0.34 %, 0.35 %, 0.36 %, 0.37 %, 0.38 %, 0.39 %, 0.40 %, 0.41 %, 0.42 %, 0.43 %, 0.44%, 0.45 %, 0.46 %, 0.47 %, 0.48 %, 0.49 %, 0.50 %, 0.51 %, 0.52 %, 0.53 %, 0.54 %, 0.55 %0.56 %, 0.57 %, 0.58 %, 0.59 %, 0.60 %, 0.61 %, 0.62 %, 0.63 %, 0.64 %, 0.65 %, 0.66 %, 0.67%, 0.68 %, 0.69 %, 0.70 %, 0.71 %, 0.72 %, 0.73 %, 0.74 %, 0.75 %, 0.76 %, 0.77 %, 0.78 %0.79 %, 0.80 %, 0.81 %, 0.82 %, 0.83 %, 0.84 %, 0.85 %, 0.86 %, 0.87 %, 0.88 %, 0.89 %, 0.90 %, 0.91 %, 0.92 %, 0.93 %, 0.94 %, 0.95 %, 0.96 %, 0.97 %, 0.98 %, 0.99 %, 1.00 %, 1.01 %, 1.02 %, 1.03 %, 1.04 %, 1.05 %, 1.06 %, 1.07 %, 1.08 %, 1.09 %, 1.10 %, 1.11 %, 1.12 %, 1.13 %, 1.14 %, 1.15 %, 1.16 %, 1.17%, 1.18 %, 1.19 %, 1.20 %, 1.21 %, 1.22 %, 1.23 %, 1.24 %, 1.25 %, 1.26 %, 1.27 %, 1.28 %, 1.29 %, or 1.30 % Mg. All expressed in wt. %.

[0037] In some cases, the novel aluminum alloys described herein can include a Mg content that is lower than the Mg content of a conventional AA5182 aluminum alloy. In some embodiments, the aluminum alloy may include at least one of Cu or Mn in the aforementioned amounts to compensate for the reduced content of Mg in the aluminum alloy. The addition of Cu and / or Mn can avoid adding additional Mg to the aluminum alloy composition, which can reduce costs.Zinc (Zn)

[0038] In some examples, the aluminum alloy described herein includes Zn in an amount of up to 0.20 % (e.g., up to 0.15 %, up to 0.10 %, or up to 0.05 %) based on the total weight of the alloy. For example, the alloy can include 0.01 %, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %, 0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, or 0.20 % Zn. In some cases, Zn is not present in the alloy (i.e., 0 %). All expressed in wt. %.Chromium (Cr)

[0039] In some examples, the aluminum alloy described herein includes Cr in an amount of up to 0.20 % (e.g., up to 0.15 %, up to 0.10 %, or up to 0.05 %) based on the total weight of the alloy. For example, the alloy can include 0.01 %, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %, 0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, or 0.20 % Cr. In some cases, Cr is not present in the alloy (i.e., 0 %). All expressed in wt. %.Titanium (Ti)

[0040] In some examples, the aluminum alloy described herein includes Ti in an amount of up to 0.20 % (e.g., up to 0.15 %, up to 0.10 %, or up to 0.05 %) based on the total weight of the alloy. For example, the alloy can include 0.01 %, 0.02 %, 0.03 %, 0.04 %, 0.05 %, 0.06 %, 0.07 %, 0.08 %, 0.09 %, 0.10 %, 0.11 %, 0.12 %, 0.13 %, 0.14 %, 0.15 %, 0.16 %, 0.17 %, 0.18 %, 0.19 %, or 0.20 % Ti. In some cases, Ti is not present in the alloy (i.e., 0 %). All expressed in wt. %.Minor Elements

[0041] Optionally, the aluminum alloys described herein can further include other minor elements, sometimes referred to as impurities, in amounts of 0.05 % or below, 0.04 % or below, 0.03 % or below, 0.02 % or below, or 0.01 % or below. These impurities may include, but are not limited to Sc, V, Ni, Hf, Zr, Sn, Ga, Ca, Bi, Na, Pb, or combinations thereof. Accordingly, Sc, V, Ni, Hf, Zr, Sn, Ga, Ca, Bi, Na, or Pb may be present in alloys in amounts of 0.05 % or below, 0.04 % or below, 0.03 % or below, 0.02 % or below, or 0.01 % or below. The sum of all impurities does not exceed 0.15 % (e.g., 0.10 %). All expressed in wt. %. The remaining percentage of each alloy can be aluminum.Properties

[0042] In some examples, an aluminum alloy product (e g., an aluminum alloy sheet) produced from the aluminum alloys described herein can have a yield strength of 150 MPa or greater. For example, an aluminum alloy product produced from the aluminum alloys described herein can have a yield strength of 160 MPa or greater, 170 MPa or greater, 180 MPa or greater, 190 MPa or greater, 200 MPa or greater, 210 MPa or greater, 220 MPa or greater, 230 MPa or greater, 240 MPa or greater, or 250 MPa or greater. In some cases, the yield strength is from 150 MPa to 300 MPa (e.g., from 160 MPa to 290 MPa, from 200 MPa to 290 MPa, from 230 MPa to 290 MPa, or from 250 MPa to 290 MPa), or anywhere in between. The aluminum alloy products described herein can exhibit the yield strengths as described herein when measured in a longitudinal (L) direction, a transverse (T) direction, and / or in a diagonal (D) direction, each respective to the rolling direction.

[0043] In some examples, an aluminum alloy product produced from the aluminum alloys described herein can have an ultimate tensile strength of 200 MPa or greater. For example, the aluminum alloy products can have an ultimate tensile strength of 210 MPa or greater, 220 MPa or greater, 230 MPa or greater, 240 MPa or greater, 250 MPa or greater, 260 MPa or greater, 270 MPa or greater, 280 MPa or greater, or 290 MPa or greater. In some cases, the ultimate tensile strength is from 200 MPa to 350 MPa (e.g., from 210 MPa to 340 MPa, from 225 MPa to 330 MPa, from 240 MPa to 320 MPa, or from 260 MPa to 320 MPa), or anywhere in between. The aluminum alloy products described herein can exhibit the ultimate tensile strengths as describedherein when measured in a longitudinal (L) direction, a transverse (T) direction, and / or in a diagonal (D) direction, each respective to the rolling direction.

[0044] In some examples, an aluminum alloy product produced from the aluminum alloys described herein can have a total elongation from 3% to 15% (e.g., from 3% to 14%, from 4% to 12%, from 6% to 12%, from 7% to 12%, or from 6% to 10%). For example, an aluminum alloy product produced from the aluminum alloys described herein can have a total elongation of 3%, 4%, 5 %, 6 %, 7 %, 8 %, 9 %, 10 %, 11 %, 12 %, 13 %, 14 %, or 15 %, or anywhere in between. The aluminum alloy products described herein can exhibit the total elongations as described herein when measured in a longitudinal (L) direction, a transverse (T) direction, and / or in a diagonal (D) direction, each respective to the rolling direction.Methods of Making Aluminum Alloys

[0045] The aluminum alloys described herein can be cast into a cast product using a direct chill (DC) process or can be cast using a continuous casting (CC) process. The casting process is performed according to standards commonly used in the aluminum industry as known to one of skill in the art. The CC process may include, but is not limited to, the use of twin belt casters, twin roll casters, or block casters. In some examples, the casting process is performed by a CC process to form a slab, a strip, or the like. In some examples, the casting process is a DC casting process to form a cast product. Prior to casting, multiple recycled aluminum alloy scrap sources can be melted to produce an aluminum alloy melt for casting. In some embodiments, the recycled aluminum alloy scrap sources can be one or more of used beverage cans (UBC), automotive scraps, extrusion scraps, lithographic product scrap, run-around scraps, etc.

[0046] The cast product, slab, or strip can then be subjected to further processing steps. Optionally, the further processing steps can be used to prepare aluminum alloy products (e.g., sheets, shates, or plates). Such processing steps include, but are not limited to, a homogenization step, a hot rolling step, a cold rolling step, an annealing step and an optional lacquering step. The processing steps are described below in relation to a cast product. However, the processing steps can also be used for a cast slab or strip, using modifications as known to those of skill in the art.

[0047] In a homogenization step, a cast product may be heated to a homogenization temperature, such as a temperature ranging from 400 °C to 610 °C. For example, the cast product can be heated to a temperature of 400 °C, 410 °C, 420 °C, 430 °C, 440 °C, 450 °C, 460 °C, 470°C, 480 °C, 490 °C, 500 °C, 510 °C, 520 °C, 530 °C, 540 °C, 550 °C, 560 °C, 570 °C, 580 °C, 590 °C, 600 °C, or 610 °C. In some embodiments, the heating rate to the peak metal temperature can be 70 °C / hour or less, 60 °C / hour or less, or 50 °C / hour or less. The cast product may then be allowed to soak (i.e., held at the indicated temperature) for a period of time to form a homogenized product. In some examples, the soaking time at the peak metal temperature can be 0.5 hours to 24 hours (e.g., from 1.0 hours to 22 hours, from 2.0 hours to 20 hours, from 3.0 hours to 18 hours, from 4.0 hours to 16 hours, from 5.0 hours to 14 hours, from 6.0 hours to 12 hours, from 7.0 hours to 10 hours, or from 8.0 hours to 9.0 hours). In some examples, the total time for the homogenization step, including the heating and soaking phases, can be up to 24 hours.

[0048] In some embodiments, the homogenization step described herein can be a two-stage homogenization. The first stage may include heating a cast product to a first homogenization temperature of 550 °C to 630 °C (e g., from 570 °C to 610 °C, from 580 °C to 610 °C, from 580 °C to 600 °C, or from 590 °C to 600 °C). For example, the cast product can be heated to a temperature of 550 °C, 560 °C, 570 °C, 580 °C, 590 °C, 600 °C, 610 °C, 620 °C, or 630 °C. In some cases, the cast product is heated to a first homogenization temperature from 580 °C to 600 °C. In some cases, the heating rate to the first homogenization temperature can be 70 °C / hour or less, 60 °C / hour or less, or 50 °C / hour or less. The cast product is then allowed to soak (i.e., held at the indicated temperature first homogenization temperature) for a period of time. In some cases, the cast product is allowed to soak for up to 10 hours (e.g., from 30 minutes to 10 hours, inclusively) at the first homogenization temperature. For example, the cast product can be soaked at a first homogenization temperature from 570 °C to 610 °C for 30 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, or 10 hours. In some embodiments, the cast product can be soaked at a first homogenization temperature from 580 °C to 600 °C for 2 hours to 5 hours.

[0049] The second stage may include heating the cast product from the first homogenization temperature to a second homogenization temperature of 450 °C to 590 °C (e.g., from 460 °C to 580 °C, from 470 °C to 570 °C, from 480 °C to 510 °C, or from 490 °C to 500 °C). For example, the cast product can be heated to a temperature of 450 °C, 460 °C, 470 °C, 480 °C, 490 °C, 500 °C, 510 °C, 520 °C, 530 °C, 540 °C, 550 °C, 560 °C, 580 °C, 580 °C, or 590 °C. In some cases, the cast product is heated to a first homogenization temperature from 480 °C to 510 °C. The cast product is then allowed to soak for a period of time at the second homogenization temperature. Insome cases, the cast product is allowed to soak for up to 10 hours (e.g., from 30 minutes to 10 hours, inclusively) at the second homogenization temperature. For example, the cast product can be soaked at a second homogenization temperature from 450 °C to 590 °C for 30 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, or 10 hours. In some embodiments, the cast product can be soaked at a second homogenization temperature from 480 °C to 510 °C for 0 to 2 hours.

[0050] Following a homogenization step, a hot rolling step can be performed. The homogenized product can be hot rolled using a rolling mill to produce a hot rolled product. Prior to the start of hot rolling, the homogenized product can be allowed to cool to a desired temperature, such as from 200 °C to 425 °C. For example, the homogenized product can be allowed to cool to a temperature of from 200 °C to 400 °C, 250 °C to 375 °C, 300 °C to 425 °C, or from 350 °C to 400 °C. The homogenized product can then be hot rolled at a hot rolling temperature, for example, from 200 °C to 450 °C, to produce a hot rolled product (e.g., a hot rolled plate, a hot rolled shate, or a hot rolled sheet). In some embodiments, the homogenized product can be hot rolled in a tandem hot mill.

[0051] The hot rolled product can be cold rolled using cold rolling mills into thinner products, such as a final gauge rolled product. The cold rolling can be performed to result in a final gauge thickness that represents a gauge reduction of greater than 75% (e.g., greater than 80 %, or greater than 85 % reduction) as compared to a gauge prior to the start of cold rolling. In some embodiments, the cold rolling step may include one or more cold rolling steps to achieve the desired gauge thickness reduction. Optionally, the process for producing the aluminum alloy can include an annealing step (e.g., between one or more cold rolling steps or after cold rolling). For example, the final gauge rolled product can be annealed at a temperature of from 150 °C to 350 °C for 30 minutes to 5 hours, e.g., from 175 °C to 325 °C, from 200 °C to 350 °C, from 200 °C to 300 °C, or from 225 °C to 275 °C. In some embodiments, the final gauge rolled product can be annealed at a temperature from 230 °C to 260 °C for 1 hour to 3 hours.

[0052] Subsequently, the final gauge rolled product can optionally undergo a lacquering step. The lacquering step can include a step of applying a coating on the final gauge rolled product at a temperature from 150 °C to 400 °C for 1 second to 10 minutes. For example, the final gauge rolled product can be lacquered at a temperature of from 150 °C to 400 °C, from 200 °C to 400 °C, from 250 °C to 350 °C, from 200 °C to 300 °C, or from 300 °C to 400 °C. The peak metal temperatureof the final gauge rolled product during the lacquering process may range from 100 °C to 300 °C (e.g., from 125 °C to 275 °C, from 150 °C to 250 °C, or from 200 °C to 300 °C).Food Packaging Configured to Receive Food Products

[0053] The food packaging produced from the aluminum alloy described herein is configured to receive food products. In some examples, the food packaging comprises a food end and a food body, wherein the food end comprises an aluminum alloy described herein. In some examples, the food end and food body of the food packaging comprises a 3xxx series aluminum alloy. In some examples, the 3xxx series aluminum alloy comprises a AA3104 aluminum alloy. In some aspects, the food body comprises the same aluminum alloy as the food end.

[0054] The food packaging is configured to receive various food products. The food packaging can receive fruits such as peaches, pears, mandarin oranges, pineapple, pink grapefruit, and fruit cocktail, vegetables such as corn, green beans, mushrooms, carrots, beets, asparagus, pumpkin, tomatoes, and okra, grains such as pasta, noodle soup, and barley soup, dairy such as evaporated milk, cheese, and macaroni and cheese, protein such as tuna, shrimp, sardines, salmon, chicken, baked beans, pinto beans, kidney beans, chickpeas, and lentils, and various pet foods.

[0055] In some examples, the food end has a gauge thickness from 0.001 mm to 0.01 mm (e.g., from 0.001 mm to 0.009 mm, from 0.002 mm to 0.008 mm, or from 0.004 mm to 0.008 mm). The food end can have a gauge thickness of 0.001 mm, 0.002 mm, 0.003 mm, 0.004 mm, 0.005 mm, 0.006 mm, 0.007 mm, 0.008 mm, 0.009 mm, or 0.010 mm.

[0056] In some examples, the food packaging is configured to withstand an internal pressure of up to 0.50 MPa (e.g., up to 0.48 MPa, up to 0.42 MPa, up to 0.35 MPa, up to 0.28 MPa, up to 0.21 MPa, up to 0.18 MPa, up to 0.14 MPa, or up to 0.11 MPa). The food packaging may be configured to withstand an internal pressure of up to 0.10 MPa, 0.11 MPa, 0.12 MPa, 0.13 MPa, 0.14 MPa, 0.15 MPa, 0.16 MPa, 0.17 MPa, 0.18 MPa, 0.19 MPa, 0.20 MPa, 0.21 MPa, 0.22 MPa,0.23 MPa, 0.24 MPa, 0.25 MPa, 0.26 MPa, 0.27 MPa, 0.28 MPa, 0.29 MPa, 0.30 MPa, 0.31 MPa,0.32 MPa, 0.33 MPa, 0.34 MPa, 0.35 MPa, 0.36 MPa, 0.37 MPa, 0.38 MPa, 0.39 MPa, 0.40 MPa,0.41 MPa, 0.42 MPa, 0.43 MPa, 0.44 MPa, 0.45 MPa, 0.46 MPa, 0.47 MPa, 0.48 MPa, 0.49 MPa, or 0.50 MPa.

[0057] In some examples, the food end of the food packaging comprises a coating with a thickness measuring 1500 mg / m2to 3100 mg / m2. The coating may have a thickness measuring1500 mg / m2, 1600 mg / m2, 1700 mg / m2, 1800 mg / m2, 1900 mg / m2, 2000 mg / m2, 2100 mg / m2, 2200 mg / m2, 2300 mg / m2, 2400 mg / m2, 2500 mg / m2, 2600 mg / m2, 2700 mg / m2, 2800 mg / m2, 2900 mg / m2, 3000 mg / m2, or 3100 mg / m2.Examples

[0058] Sample aluminum alloys were tested to determine the properties of the aluminum alloys described herein to determine if the alloys would be an effective replacement for AA5352 aluminum alloy for a food end. A sample aluminum alloy was direct chill cast to produce a cast product, the cast product was scalped to remove 9 mm per side, the cast product was homogenized at a temperature of 595 °C and soaked at the homogenization temperature for two hours to produce a homogenized cast product, the homogenized cast product was cooled to 510 °C, the cooled homogenized cast product was hot rolled to a gauge thickness of 1.8 mm in 13 hot roll passes to produce a hot rolled product, the hot rolled product was cold rolled to a final gauge thickness of 0.256 mm (85.9 % thickness reduction in 1 pass in a 3 mill CM process) and then subjected to annealing at 255 °C for 2 hours, followed by coating. The composition of Example Alloy A and AA5352 aluminum alloy is provided below.Table 6

[0059] The AA5352 aluminum alloy was produced according to a similar method as Example Alloy A but required more than 15 % prime aluminum compared to Example Alloy A. Additionally, AA5352 aluminum alloy required a higher scalp thickness reduction (12 mm / side), more hot rolling passes, and had less overall recovery. Thus, the process for producing Example Alloy A is more economical and leads to substantial cost and CO2 savings in comparison to AA5352 aluminum alloy.Illustrations of Suitable Methods and Alloy Products

[0060] Illustration 1 : An aluminum alloy for a food packaging end, the aluminum alloy comprising up to 0.50 wt. % Si, up to 0.80 wt. % Fe, up to 0.30 wt. % Cu, up to 1.20 wt. % Mn,up to 1 .30 wt. % Mg, up to 0.20 wt. % Zn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al.

[0061] Illustration 2: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy comprises 0.05 - 0.40 wt. % Si, 0.10 - 0.70 wt. % Fe, 0.01 - 0.25 wt. % Cu, 0.25- 1.10 wt. % Mn, 0.50 - 1.20 wt. % Mg, up to 0.15 wt. % Zn, up to 0.15 wt. % Cr, up to 0.15 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al.

[0062] Illustration 3: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy comprises 0.10 - 0.40 wt. % Si, 0.20 - 0.70 wt. % Fe, 0.05 - 0.25 wt. % Cu, 0.50- 1.10 wt. % Mn, 0.60 - 1.20 wt. % Mg, up to 0.15 wt. % Zn, up to 0.15 wt. % Cr, up to 0.15 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al.

[0063] Illustration 4: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy comprises 0.20 - 0.40 wt. % Si, 0.30 - 0.60 wt. % Fe, 0.05 - 0.20 wt. % Cu, 0.75- 1.10 wt. % Mn, 0.80 - 1.20 wt. % Mg, up to 0.10 wt. % Zn, up to 0.10 wt. % Cr, up to 0.10 wt. % Ti, up to 0. 10 wt. % impurities, and remainder Al.

[0064] Illustration 5: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy comprises 0.20 - 0.30 wt. % Si, 0.40 - 0.60 wt. % Fe, 0.10 - 0.20 wt. % Cu, 0.80- 1.00 wt. % Mn, 1.00 - 1.20 wt. % Mg, up to 0.05 wt. % Zn, up to 0.05 wt. % Cr, up to 0.05 wt. % Ti, up to 0.05 wt. % impurities, and remainder Al.

[0065] Illustration 6: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy has a yield strength from 150 MPa to 300 MPa.

[0066] Illustration 7: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy has an ultimate tensile strength from 200 MPa to 350 MPa.

[0067] Illustration 8: The illustration of any preceding or subsequent illustration, wherein the aluminum alloy has an elongation from 3 % to 20 %.

[0068] Illustration 9: A food end comprising the aluminum alloy of any preceding or subsequent illustration.

[0069] Illustration 10: The illustration of any preceding or subsequent illustration, wherein the food end has a gauge thickness from 0.001 mm to 0.01 mm.

[0070] Illustration 11: A food body comprising the aluminum alloy of any preceding or subsequent illustration.

[0071] Illustration 12: A food packaging comprising a food end and a food body, wherein the food end comprises an aluminum alloy comprising up to 0.50 wt. % Si, up to 0.80 wt. % Fe, up to 0.30 wt. % Cu, up to 1.20 wt. % Mn, up to 1.30 wt. % Mg, up to 0.20 wt. % Zn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al, wherein the food packaging is configured to store food products.

[0072] Illustration 13 : The illustration of any preceding or subsequent illustration, wherein the food body comprises a 3xxx series aluminum alloy.

[0073] Illustration 14: The illustration of any preceding or subsequent illustration, wherein the 3xxx series aluminum alloy comprises a AA3104 aluminum alloy.

[0074] Illustration 15: The illustration of any preceding or subsequent illustration, wherein the food body comprises the same aluminum alloy as the food end.

[0075] Illustration 16: The illustration of any preceding or subsequent illustration, wherein the food end has a gauge thickness from 0.001 mm to 0.01 mm.

[0076] Illustration 17: The illustration of any preceding or subsequent illustration, wherein the food packaging is configured to withstand an internal pressure of up to 0.50 MPa.

[0077] Illustration 18: The illustration of any preceding or subsequent illustration, wherein the food packaging is configured to withstand an internal pressure of up to 0.11 MPa.

[0078] Illustration 19: The illustration of any preceding or subsequent illustration, wherein the food end comprises a coating with a thickness from 1500 mg / m2to 3100 mg / m2.

[0079] Illustration 20: The illustration of any preceding or subsequent illustration, wherein the food end has a gauge thickness from 0.001 mm to 0.01 mm, wherein the food packaging is configured to withstand an internal pressure of up to 0.15 MPa, and wherein the food packaging is configured to receive a food product.

[0080] All patents, publications, and abstracts cited above are incorporated herein by reference in their entireties. Various embodiments of the invention have been described in fulfillment of the various objectives of the invention. It should be recognized that these embodiments are merely illustrative of the principles of the present invention. Numerous modifications and adaptions thereof will be readily apparent to those skilled in the art without departing from the spirit and scope of the present invention as defined in the following claims.

Claims

WHAT IS CLAIMED IS:

1. An aluminum alloy for a food packaging end, the aluminum alloy comprising up to 0.50 wt. % Si, up to 0.80 wt. % Fe, up to 0.30 wt. % Cu, up to 1.20 wt. % Mn, up to 1.30 wt. % Mg, up to 0.20 wt. % Zn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al.

2. The aluminum alloy of claim 1, comprising 0.05 - 0.40 wt. % Si, 0.10 - 0.70 wt. % Fe, 0.01 - 0.25 wt. % Cu, 0.25 - 1.10 wt. % Mn, 0.50 - 1.20 wt. % Mg, up to 0.15 wt. % Zn, up to 0.15 wt. % Cr, up to 0.15 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al.

3. The aluminum alloy of claim 1, comprising 0.10 - 0.40 wt. % Si, 0.20 - 0.70 wt. % Fe, 0.05 - 0.25 wt. % Cu, 0.50 - 1.10 wt. % Mn, 0.60 - 1.20 wt. % Mg, up to 0.15 wt. % Zn, up to 0.15 wt. % Cr, up to 0.15 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al.

4. The aluminum alloy of claim 1, comprising 0.20 - 0.40 wt. % Si, 0.30 - 0.60 wt. % Fe, 0.05 - 0.20 wt. % Cu, 0.75 - 1.10 wt. % Mn, 0.80 - 1.20 wt. % Mg, up to 0.10 wt. % Zn, up to 0.10 wt. % Cr, up to 0.10 wt. % Ti, up to 0.10 wt. % impurities, and remainder Al.

5. The aluminum alloy of claim 1, comprising 0.20 - 0.30 wt. % Si, 0.40 - 0.60 wt. % Fe, 0.10 - 0.20 wt. % Cu, 0.80 - 1.00 wt. % Mn, 1.00 - 1.20 wt. % Mg, up to 0.05 wt. % Zn, up to 0.05 wt. % Cr, up to 0.05 wt. % Ti, up to 0.05 wt. % impurities, and remainder Al.

6. The aluminum alloy of any of claims 1-5, wherein the aluminum alloy has a yield strength from 150 MPa to 300 MPa.

7. The aluminum alloy of any of claims 1-6, wherein the aluminum alloy has an ultimate tensile strength from 200 MPa to 350 MPa.

8. The aluminum alloy of any of claims 1-7, wherein the aluminum alloy has an elongation from 3 % to 20 %.

9. A food end comprising the aluminum alloy of any of claims 1-8.

10. The food end of claim 9, wherein the food end has a gauge thickness from 0.001 mm to 0.01 mm.

11. A food body stock comprising the aluminum alloy of any of claims 1-8.

12. A food packaging comprising a food end and a food body, wherein the food end comprises an aluminum alloy comprising up to 0.50 wt. % Si, up to 0.80 wt. % Fe, up to 0.30 wt. % Cu, up to 1.20 wt. % Mn, up to 1.30 wt. % Mg, up to 0.20 wt. % Zn, up to 0.20 wt. % Cr, up to 0.20 wt. % Ti, up to 0.15 wt. % impurities, and remainder Al, wherein the food packaging is configured to store food products.

13. The food packaging of claim 12, wherein the food body comprises a 3xxx series aluminum alloy.

14. The food packaging of claim 13, wherein the 3xxx series aluminum alloy comprises a AA3104 aluminum alloy.

15. The food packaging of any of claims 12-14, wherein the food body comprises the same aluminum alloy as the food end.

16. The food packaging of any of claims 12-15, wherein the food end has a gauge thickness from 0.001 mm to 0.01 mm.

17. The food packaging of any of claims 12-16, wherein the food packaging is configured to withstand an internal pressure of up to 0.50 MPa.

18. The food packaging of any of claims 12-17, wherein the food packaging is configured to withstand an internal pressure of up to 0.11 MPa.

19. The food packaging of any of claims 12-18, wherein the food end comprises a coating with a thickness from 1500 mg / m2to 3100 mg / m2.

20. The food packaging of claim 12, wherein the food end has a gauge thickness from 0.001 mm to 0.01 mm, wherein the food packaging is configured to withstand an internal pressure of up to 0.15 MPa, and wherein the food packaging is configured to receive a food product.