The present application relates generally to formed articles, and in particular to formed articles which aid in separation between packaging parts for more environmentally friendly disposal. The present application also relates to methods of using such packages.
Formed articles are generally used in various applications, such as packaging. Conventional formed articles include recyclable components, such as base trays, and non-recyclable components, such as polymeric liners. Base trays with polymeric liners have been used in various applications. These applications include packaging for various items, including industrial or consumer goods products and food products. The base tray has advantages of low cost, low weight, recyclability, thermal insulation, tangible haptics, and high stiffness. The polymeric liner is added to enhance the physical properties of the base tray, including sealing properties, moisture resistance, gas barrier, grease and flavor resistance, and durability. Since, there are currently no recyclable options in polymeric liners, the base tray must be separated from the polymeric liner in order to facilitate recycling of the base tray.
Often manual separation can be difficult or results in too much of the recyclable component (i.e., the base tray) and/or the non-recyclable component (i.e., the polymeric liner) remaining adhered to each other after separation. Thus, as the difficulty of separating the two components increases, the likelihood that the recyclable component will be recycled decreases.
A formed article has been developed which includes a rigid film with a line of weakness. The formed article further includes a liner film. The rigid film and the liner film are joined to each other, such that the rigid film can be peelably separated from the liner film along the line of weakness.
One embodiment of the present disclosure is a formed article including a rigid film, a liner film, and a cavity. The rigid film includes a thickness and a line of weakness. The rigid film and the liner film are joined to each other. Further, the line of weakness is positioned in the cavity.
In some embodiments, the formed article further includes a flange. The line of weakness includes a length from a point on the flange to an opposing point on the flange.
In some embodiments, the line of weakness includes a depth. The depth of the line of weakness is less than or equal to the thickness of the rigid film.
In some embodiments, the line of weakness includes at least one of a cut, a perforation and a score.
In some embodiments, the line of weakness is provided in the rigid film before forming of the cavity.
In some embodiments, the formed article further includes an additional film. The additional film is joined to the liner film opposite to the rigid film.
In some embodiments, the additional film includes a thickness equal to or less than the thickness of the rigid film.
In some embodiments, the additional film includes one or more of amorphous polyester (APET), crystalline polyester (CPET), olefin-based materials, polystyrene, and polylactic acid (PLA).
In some embodiments, the rigid film includes one or more of amorphous polyester (APET), crystalline polyester (CPET), olefin-based materials, polystyrene, and polylactic acid (PLA).
In some embodiments, the liner film includes at least one of ethylene vinyl alcohol (EVOH) and high-density polyethylene (HOPE).
In some embodiments, the liner film further includes a compatibilizer.
In some embodiments, the liner film includes a barrier material.
In some embodiments, a bond strength between the rigid film and the liner film is greater than or equal to 50 grams (g)/25.4 millimeters (mm).
In some embodiments, the formed article further includes a lidding component.
In some embodiments, the line of weakness is centrally positioned along a length of the rigid film.
In some embodiments, a material of the rigid film and a material of the liner film have different recycling profiles.
One embodiment of the present disclosure is a method for removing the rigid film from the liner film of the formed article, as previously described. The method includes: supplying the formed article; subjecting the formed article to a fracturing energy that separates the rigid film into a first segment and a second segment at the line of weakness; and grasping the first segment and the second segment of the rigid film to peelably remove the first segment and the second segment from the liner film.
One embodiment of the present disclosure is a formed article including a rigid film, a liner film, and a cavity. The rigid film includes a thickness, a length, and a line of weakness. The line of weakness includes a depth less than or equal to the thickness of the rigid film. The line of weakness extends perpendicular to the length of the rigid film. The rigid film and the liner film are joined to each other. The line of weakness is positioned in the cavity.
In some embodiments, the formed article further includes a flange. The line of weakness includes a length from a point on the flange to an opposing point on the flange.
In some embodiments, the formed article further includes an additional film. The additional film is joined to the liner film opposite to the rigid film.
There are several aspects of the present subject matter which may be embodied separately or together. These aspects may be employed alone or in combination with other aspects of the subject matter described herein, and the description of these aspects together is not intended to preclude the use of these aspects separately or the claiming of such aspects separately or in different combinations.
The disclosure may be more completely understood in consideration of the following detailed description of various embodiments of the disclosure in connection with the accompanying drawings, in which:
The figures are not necessarily to scale. Like numbers used in the figures refer to like components. It will be understood, however, that the use of a number to refer to a component in a given figure is not intended to limit the component in another figure labeled with the same number.
The present application describes a formed article including a rigid film, a liner film, and a cavity. The rigid film incudes a thickness and a line of weakness. The rigid film and the liner film are joined to each other. Further, the line of weakness is positioned in the cavity. The rigid film may be peelably separated from the liner film along the line of weakness after use so that the rigid film and the liner film can be put into appropriate recycling and waste streams. The line of weakness of the rigid film may facilitate separation of the rigid film from the liner film without any additional apparatus or tools. The present disclosure may therefore provide ease in recycling of the rigid film of the formed article.
One embodiment of a formed article 100 is illustrated in
Formed article 100 further includes a rigid film 102, a liner film 106, an additional film 112 and a cavity 108 (shown in
Top portion 116 of package body 114 further defines an opening 119 (shown in
Formed article 100 further includes a lidding component 122. Lidding component 122 is disposed on top portion 116 of package body 114 and covers cavity 108. Lidding component 122 may be adhesively sealed to top portion 116 of package body 114. Specifically, lidding component 122 may be adhesively sealed to flange 123 of package body 114. In some cases, lidding component 122 may be resealable based on application requirements. In some other cases, lidding component 122 may be non-resealable. Lidding component 122 further includes a tab 130 to facilitate removal of lidding component 122 from package body 114. Tab 130 may be grasped by a user to enable peeling of lidding component 122 from flange 123.
Lidding component 122 can exhibit one or more properties (e.g., tensile strength, barrier properties, ability to carry printing or adhesive labels, and surface appearance) required for the desired application. In some embodiments, lidding component 122 may be a monolayer film. In embodiments where lidding component 122 is a monolayer film, lidding component 122 may include oriented polypropylene (OPP) or polyester (e.g., PET), as non-limiting examples. In some other embodiments, lidding component 122 may be a multilayer film, that is, a film including more than one layer, and one of the layers may include a barrier material, such as ethylene vinyl alcohol copolymer (EVOH), or any other suitable barrier material. Lidding component 122 may have any suitable shape, for example, rectangular, square, polygonal, circular, or elliptical depending on both functional and aesthetic requirements.
With reference to
Formed article 100 further includes liner film 106. Rigid film 102 and liner film 106 are joined to each other and line of weakness 104 is positioned in cavity 108. Line of weakness 194 extends at least partially along side portion 120 and bottom portion 118 within cavity 108. Formed article 100 further includes additional film 112. Additional film 112 is joined to liner film 106 opposite to rigid film 102. Lidding component 122 may be adhesively sealed to additional film 112. Additional film 112 may be an optional component. In some embodiments, additional film 112 may be omitted and lidding component 122 may be joined to liner film 106.
With reference to
In an embodiment, line of weakness 104 may include a length equal to or preferably greater than a length of bottom portion 118 of package body 114. In the illustrated embodiment, line of weakness 104 extends from one end of flange 123 to an opposite end of flange 123. In some embodiments, length L of line of weakness 104 includes widths of flange 123 at opposite sides, lengths of side portion 120 at opposite sides and the length of bottom portion 118. Therefore, line of weakness 104 includes two portions disposed on flange 123 at the opposite sides, two portions disposed on side portion 120 at the opposite sides, and a portion disposed on bottom portion 118. However, in some embodiments, line of weakness 104 may extend only partially along flange 123 at the opposite sides. In other words, points P1 and P2 may be spaced apart from edge 132 of rigid film 102. In some other embodiments, line of weakness 104 may extend only partially along side portion 120 and may not extend up to flange 123.
In some embodiments, line of weakness 104 includes at least one of a cut, a perforation and a score. A type of line of weakness 104 may be chosen based on ease of separation and peeling of rigid film 102 from liner film 106. Further, line of weakness 104 may be provided in rigid film 102 before or after forming of cavity 108. In some cases, line of weakness 104 can be formed by mechanical scoring or cutting. In some other cases, line of weakness 104 can be formed by laser scoring or cutting.
In some embodiments, line of weakness 104 may be plug-assist thermoformed. This may ensure that line of weakness 104 may not be inadvertently damaged, for example, prematurely opened or ruptured. Further, various parameters of line of weakness 104, such as type, shape, depth, length, and aspect ratio, may be varied in accordance with a configuration of rigid film 102 (e.g., thickness T), or any other factor or component related to formed article 100. Additionally, or alternatively, a configuration of line of weakness 104 may be decided based upon volume of material (e.g., PET) which may remain after scoring or creation of line of weakness 104. Line of weakness 104 may be formed by removing material (e.g., PET) from a portion of rigid film 102. In a non-limiting example, about 10% to about 96% of the material in the portion of rigid film 102 may be present or left after line of weakness 104 is formed on rigid film 104.
In the illustrated embodiment, formed article 100 includes package body 114 defining cavity 108 between bottom portion 118 and side portion 120. Cavity 108 may be of any desired shape, such as, for example, rectangular, square, circular, or polygonal depending on both functional and aesthetic requirements. Formed article 100 includes package body 114 made of multiple films, namely, rigid film 102, liner film 106 and additional film 112. The multiple films may provide rigidity as well as enhanced oxygen and moisture barrier properties. This may be suitable in applications having certain barrier requirements for a desired shelf life. These applications may include packaging of meat and dairy products (e.g., cheese). In the illustrated embodiment, rigid film 102 is joined to liner film 106. Rigid film 102 and additional film 112 are joined to opposing surfaces of liner film 106. With bottom portion 118 as reference, liner film 106 is joined to a top surface of rigid film 102, while additional film 112 is joined to a top surface of liner film 106. Therefore, additional film 112 may form a surface of cavity 108. In cases where additional film 112 is omitted, liner film 106 may form the surface of cavity 108. In a non-limiting example, additional film 112 may provide additional support and strength to liner film 106 particularly during peeling of rigid film 102 from liner film 106. In some embodiments, the multiple films of formed article 100 may be joined to each other using adhesive, extrusion lamination, thermal lamination, or any other suitable joining method. Rigid film 102 and liner film 106 may be joined to each other such that rigid film 102 can be peeled from liner film 106. In an example, rigid film 102 and liner film 106 may be joined using adhesives.
Line of weakness 104 includes a depth D (shown in
In some embodiments, depth D of line of weakness 104 is greater than 0% and less than or equal to 100% of thickness T of rigid film 102. In some embodiments, depth D of line of weakness 104 is at least about 2%, 5%, 10%, 30%, 50%, 70%, 80%, or 90% of thickness T of rigid film 102. Further, additional film 112 includes a thickness TA (shown in
In some embodiments, a material of rigid film 102 and a material of liner film 106 have different recycling profiles. In some cases, both rigid film 102 and liner film 106 may be recyclable in separate recycling streams. In some other cases, only rigid film 102 is recyclable while liner film 106 is not recyclable. In some embodiments, a material of additional film 112 may be similar to the material of rigid film 102. In some other embodiments, the material of additional film 112 may be different from the material of rigid film 102.
In some embodiments, rigid film 102 includes at least one of a semi-rigid polymeric material, a rigid polymeric material, a fiber-based component, and a formable paper. In an embodiment, rigid film 102 includes one or more of amorphous polyester (APET), crystalline polyester (CPET), olefin-based materials, polystyrene, and polylactic acid (PLA). In some embodiments, additional film 112 includes one or more of amorphous polyester (APET), crystalline polyester (CPET), olefin-based materials, polystyrene, and polylactic acid (PLA). In a non-limiting example, the olefin-based materials may be polypropylene (PP) and polyethylene (PE).
In some embodiments, liner film 106 includes at least one of ethylene vinyl alcohol (EVOH) and high-density polyethylene (HDPE). In some embodiments, liner film 106 further includes a compatibilizer. In some embodiments, liner film 106 includes a barrier material.
In some embodiments, a bond strength, as measured according to ASTM F904-98 between rigid film 102 and liner film 106 is greater than or equal to 50 grams (g)/25.4 millimeters (mm). In some other embodiments, the bond strength between rigid film 102 and liner film 106 may lie within a range from about 40 g/25.4 mm to about 260 g/25.4 mm. The bond strength between rigid film 102 and liner film 106 may be such that rigid film 102 can be easily peeled from liner film 106 without any rupture of liner film 106. In some embodiments, the bond strength between rigid film 102 and liner film 106 is less than a bond strength between liner film 106 and additional film 112. This may enable peeling of rigid film 102 from liner film 106 without removing liner film 106 from additional film 112.
Formed article 100 is shown in a “closed state” in
Referring to
The method further includes a step of grasping first segment 126 and second segment 128 of rigid film 102 to peelably remove first segment 126 and second segment 128 from liner film 106. Separation of rigid film 102 from liner film 106 may enable recycling of rigid film 102 and liner film 106 in different recycling streams. First segment 126 and second segment 128 of rigid film 102 may be partially or fully recyclable.
After removal of rigid film 102, liner film 106 and additional film 112 remain as part of formed article 100. In some cases, additional film 112 may be peeled from liner film 106, such that additional film 112 and liner film 106 can be recycled in different recycling streams. In some other cases, additional film 112 and liner film 106 may be partially or fully recycled together. In some other cases, additional film 112 and liner film 106 may be discarded as waste material.
Formed article 100 including package body 114 may be used in various packaging applications for food and non-food items. For example, formed article 100 may be used as creamer cups, pudding cups, meat trays, etc. Formed article 100 may facilitate recycling of relatively small packages, such as single-portion sized packages of beverage components (e.g., ground coffee or tea) or condiments (e.g., dipping sauces, milk, cream, or beverage whiteners). Due to the small bulk of these packages and the relative difficulty of manually peeling bound liner components from them, users may choose to forego the hassle of recycling these packages. Formed article 100 may ease separation of liner film 106 and rigid film 102 in small packages and thereby encourage recycling of the recyclable portions of such packages. Formed article 100 may also be used as medium and large sized packages for containing various items, for example, cheeses, cuts of meat and poultry, etc., as well as industrial, health care related or non-food items.
Lines of weakness 104A-104G illustrated in
Further, an angle between edges of line of weakness 104 of the present disclosure may be within a range from about 2 degrees to around 90 degrees, or any other angle as per the application.
Formed article 200 may facilitate recycling of relatively small articles, such as single-portion sized articles (or packages) of beverage components (e.g., ground coffee or tea) or condiments (e.g., dipping sauces, milk, cream, or beverage whiteners). Due to the small bulk of these articles and the relative difficulty of manually peeling bound rigid films from them, users may choose to forego the hassle of recycling these articles. Formed article 200 may ease separation of rigid film 202 from liner film 206 in small articles and thereby encourage recycling of the recyclable portions of such articles.
The present disclosure illustrates a single line of weakness 104, 204 provided in rigid films 102, 202, respectively. However, in some embodiments, multiple lines of weakness 104, 204 may be provided in rigid films 102, 202, respectively, based on application requirements.
The “Fracturing Energy” of the rigid film 102 can be measured as the total energy (in Newtons) at maximum force to break the rigid film into two separate sections. Test specimens included sheet material (rigid film 102, liner film 106 and additional film 112). The specimen sheet material included a total thickness of 711.2 micron (28 mil) and a structure of 304.8 micron (12 mil) PET/101.6 micron (4 mil) EVOH-HDPE blown film/304.8 micron (12 mil) PET. The test specimens included dimensions of 5.08 cm (2 in) width x 13.97 cm (5.5 in) length and a score line across the width of each specimen at 5.08 cm from one of the 5.08 cm edges of the specimen. One PET side of the specimen included the score line. Specimen score lines included depths of approximately 35%, 53% and 100% of the scored PET layer thickness of the specimens. Three specimens of each score depth were tested. The reported fracturing energy values are of the sheet material before it was formed (i.e., thermoformed) but after the sheet has been machined through a thermoforming machine (for example, Bosch TFA machines available from Syntegon Packaging Technology, LLC, New Richmond, Wis., USA).
Each specimen was mounted to a test fixture that included two clamps separated from each other by a 2.54 cm (1 in) gap. Each specimen was mounted such that 8.73 cm (3.4375 in) of the specimen length was mounted to the test fixture with the mounted portion of the specimen being covered by the clamps except for the portion of the specimen exposed in gap between the clamps. Further, the specimen was mounted such that the unmounted portion of the specimen included the score line being aligned with the end of the test fixture and the score line being placed 0.16 cm (0.625 in) away from the end of the test fixture. The non-scored side of the specimen faces the ground (e.g., floor, horizontal surface) and the scored side of the specimen faces away from the ground.
A steel probe was attached to a universal testing machine (UTM) that tests the tensile strength and compressive strength of materials and includes an upper crosshead (available from, for example, Instron, Norwood, Mass., USA). The probe included a tip of which is used in ASTM D3420-08a, procedure B, that includes a 1.90 cm (0.75 in) diameter and a 1.27 cm (0.5 in) radius. The probe tip was attached to a straight, cylindrical shaft. The overall probe length (probe shaft and probe tip) was 26.67 cm (10.5 in). The probe length after placement into the upper crosshead of the UTM was 23.81 cm (9.375 in), (after placement length includes the distance between the bottom of the upper crosshead and the end of the probe tip). The center of the probe was lowered onto the specimen in a location approximately 1.9 cm (0.75 in) away from the score line and centered between the side edges of the specimen at a rate of 50.8 cm/minute (20 in/minute) that broke the score. The resulting fracturing energy was reported in Newtons (N).
A. A formed article comprising:
a rigid film comprising a thickness and a line of weakness;
a liner film; and
a cavity;
a rigid film comprising a thickness, a length and a line of weakness, the line of weakness comprising a depth less than or equal to the thickness of the rigid film, wherein the line of weakness extends perpendicular to the length of the rigid film;
a liner film; and
a cavity;
R. A method for removing the rigid film from the liner film of the formed article of any one of embodiments A through Q, the method comprising the steps of:
supplying the formed article;
subjecting the formed article to a fracturing energy that separates the rigid film into a first segment and a second segment at the line of weakness; and
grasping the first segment and the second segment of the rigid film to peelably remove the first segment and the second segment from the liner film.
Each and every document cited in this present application, including any cross referenced, is incorporated in this present application in its entirety by this reference, unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any embodiment disclosed in this present application or that it alone, or in any combination with any other reference or references, teaches, suggests, or discloses any such embodiment. Further, to the extent that any meaning or definition of a term in this present application conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this present application governs.
The description, examples, embodiments, and drawings disclosed are illustrative only and should not be interpreted as limiting. As briefly described above, the reader should assume that features of one disclosed embodiment can also be applied to all other disclosed embodiments, unless expressly indicated to the contrary. Unless expressly indicated to the contrary, the numerical parameters set forth in the present application are approximations that can vary depending on the desired properties sought to be obtained by a person of ordinary skill in the art without undue experimentation using the teachings disclosed in the present application. Modifications and other embodiments will be apparent to a person of ordinary skill in the packaging arts, and all such modifications and other embodiments are intended and deemed to be within the scope of the present invention.
Filing Document | Filing Date | Country | Kind |
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PCT/US20/42623 | 7/17/2020 | WO |