Patent Application
20220227556
Known are flexible containers that are used to store, transport, and dispense a flowable material. Large, gusseted flexible containers having handles on the top and the bottom of the container are becoming increasingly available. The requisite two-hand operation of the dual handle container has several drawbacks. The non-rigid and pliable nature of the flexible container requires two-hand operation to avoid spillage while dispensing. The operator's care and attention is further required during the entire dispensing sequence to ensure the container handle does not get in the way of the dispensing flow and invoke spillage.
The art recognizes the need for flexible containers with improved handling and dispensing control.
Disclosed herein is a flexible container. In an embodiment, the flexible container includes a front panel, a rear panel, a first gusseted side panel, and a second gusseted side panel. The gusseted side panels adjoin the front panel and the rear panel along peripheral seals to form a chamber. The panels form (i) a top portion, (ii) a body portion, and (iii) a bottom portion. The top portion comprises a neck and a fitment in the neck. The front panel comprises a front handle extending therefrom and the rear panel comprises a rear handle extending therefrom. The front handle and the rear handle are in opposing relation to each other, the front handle and the rear handle extending over the first gusseted side panel.
Also disclosed herein is a process. In an embodiment, the process includes providing a flexible container comprising a front panel, a rear panel, a first gusseted side panel, and a second gusseted side panel. The gusseted side panels adjoin the front panel and the rear panel along peripheral seals to form a chamber. The panels form (i) a top portion comprising a neck and a fitment in the neck, (ii) a body portion, and (iii) a bottom portion. The top portion comprises a neck and a fitment in the neck. The front panel comprises a front handle extending therefrom and the rear panel comprises a rear handle extending therefrom. The front handle and the rear handle are in opposing relation to each other, the front handle and the rear handle extending over the first gusseted side panel. The process includes grasping the front handle and the rear handle and lifting the flexible container with the handles.
All references to the Periodic Table of the Elements herein shall refer to the Periodic Table of the Elements, published and copyrighted by CRC Press, Inc., 2003. Also, any references to a Group or Groups shall be to the Group or Groups reflected in this Periodic Table of the Elements using the IUPAC system for numbering groups.
For purposes of United States patent practice, the contents of any referenced patent, patent application or publication are incorporated by reference in their entirety (or its equivalent US version is so incorporated by reference) especially with respect to the disclosure of definitions (to the extent not inconsistent with any definitions specifically provided in this disclosure) and general knowledge in the art.
The numerical ranges disclosed herein include all values from, and including, the lower value and the upper value. For ranges containing explicit values (e.g., a range from 1, or 2, or 3 to 5, or 6, or 7) any subrange between any two explicit values is included (e.g., the range 1-7 above includes subranges 1 to 2; 2 to 6; 5 to 7; 3 to 7; 5 to 6; etc.).
Unless stated to the contrary, implicit from the context, or customary in the art, all parts and percentages are based on weight, and all test methods are current as of the filing date of this disclosure.
The term “composition,” as used herein, refers to a mixture of materials which comprise the composition, as well as reaction products and decomposition products formed from the materials of the composition.
The terms “comprising,” “including,” “having,” and their derivatives, are not intended to exclude the presence of any additional component, step or procedure, whether or not the same is specifically disclosed. In order to avoid any doubt, all compositions claimed through use of the term “comprising” may include any additional additive, adjuvant, or compound, whether polymeric or otherwise, unless stated to the contrary. In contrast, the term, “consisting essentially of” excludes from the scope of any succeeding recitation any other component, step or procedure, excepting those that are not essential to operability. The term “consisting of” excludes any component, step or procedure not specifically delineated or listed.
An “ethylene-based polymer,” as used herein is a polymer that contains more than 50 weight percent polymerized ethylene monomer (based on the total amount of polymerizable monomers) and, optionally, may contain at least one comonomer.
An “olefin-based polymer,” as used herein is a polymer that contains more than 50 weight percent polymerized olefin monomer (based on total amount of polymerizable monomers), and optionally, may contain at least one comonomer. Nonlimiting examples of olefin-based polymer include ethylene-based polymer and propylene-based polymer.
A “polymer” is a compound prepared by polymerizing monomers, whether of the same or a different type, that in polymerized form provide the multiple and/or repeating “units” or “mer units” that make up a polymer. The generic term polymer thus embraces the term homopolymer, usually employed to refer to polymers prepared from only one type of monomer, and the term copolymer, usually employed to refer to polymers prepared from at least two types of monomers. It also embraces all forms of copolymer, e.g., random, block, etc. The terms “ethylene/α-olefin polymer” and “propylene/α-olefin polymer” are indicative of copolymer as described above prepared from polymerizing ethylene or propylene respectively and one or more additional, polymerizable α-olefin monomer. It is noted that although a polymer is often referred to as being “made of” one or more specified monomers, “based on” a specified monomer or monomer type, “containing” a specified monomer content, or the like, in this context the term “monomer” is understood to be referring to the polymerized remnant of the specified monomer and not to the unpolymerized species. In general, polymers herein are referred to has being based on “units” that are the polymerized form of a corresponding monomer.
A “propylene-based polymer” is a polymer that contains more than 50 weight percent polymerized propylene monomer (based on the total amount of polymerizable monomers) and, optionally, may contain at least one comonomer.
Density is measured in accordance with ASTM D792 with results reported in grams per cubic centimeter (g/cc).
Melt index (MI) is measured in accordance with ASTM D1238, Condition 190° C./2.16 kg with results reported in grams per 10 minutes (g/10 min).
Tm or “melting point” as used herein (also referred to as a melting peak in reference to the shape of the plotted DSC curve) is typically measured by the DSC (Differential Scanning calorimetry) technique for measuring the melting points or peaks of polyolefins as described in U.S. Pat. No. 5,783,638. It should be noted that many blends comprising two or more polyolefins will have more than one melting point or peak, many individual polyolefins will comprise only one melting point or peak.
The present disclosure provides a flexible container. The flexible container includes a front panel, a rear panel, a first gusseted side panel, and a second gusseted side panel. The gusseted side panels adjoin the front panel and the rear panel along peripheral seals to form a chamber. The panels form (i) a top portion, (ii) a body portion, and (iii) a bottom portion. The top portion includes a neck and a fitment in the neck. The front panel includes a front handle extending from the front panel. The rear panel includes a rear handle extending from the rear panel. The front handle and the rear handle are in opposing relation to each other. The front handle and the rear handle extend over the first gusseted side panel.
The flexible container 10 has four panels. During the fabrication process, the panels are formed when one or more webs of film material are sealed together. In an embodiment, four webs of film material are sealed together to form the four panels. While the webs may be separate pieces of film material, it will be appreciated that any number of seams between the webs could be “pre-made,” as by folding one or more of the source webs to create the effect of a seam or seams. For example, if it were desired to fabricate the present flexible container from two webs instead of four, the bottom, left center, and right center webs could be a single folded web, instead of three separate webs. Similarly, one, two, or more webs may be used to produce each respective panel (i.e., a bag-in-a-bag configuration or a bladder configuration).
As shown in
The four panels 18, 20, 22 and 24 each can be composed of a separate web of multilayer film. The composition and structure for each web of multilayer film can be the same or different. Alternatively, one web of multilayer film may also be used to make all four panels. In a further embodiment, two or more webs of multilayer film can be used to make each panel.
The flexible multilayer film used in construction of each panel of the flexible container 10 can comprise a food-grade plastic. For instance, nylon, polypropylene, polyethylene such as high density polyethylene (HDPE) and/or low density polyethylene (LDPE) may be used as discussed later. The flexible multilayer film can have a thickness that is adequate to maintain a flowable material and package integrity during manufacturing, distribution, product shelf life and customer usage. The film material can also be such that it provides the appropriate atmosphere within the flexible container 10 to maintain a product shelf life of at least about 180 days. The flexible multilayer film can comprise an oxygen barrier film having an oxygen transmission rate (OTR) that is reported in units of “cc/m2/24 h/atm” and measured at 23° C. and 80% relative humidity (RH). In an embodiment, the flexible multilayer film has an OTR value from 0, or 0.2 to 0.4, or 1 cc/m2/24 h/atm. In a further embodiment, the flexible multilayer film has an OTR value from 0 to 1, or from 0.2 to 0.4 cc/m2/24 h/atm. Additionally, the flexible multilayer film can also comprise a water vapor barrier film having a water vapor transmission rate (WVTR) that is reported in units of “g/m2/24 h” and measured at 38° C. and 90% RH. In an embodiment, the flexible multilayer film has a WVTR value from 0, or 0.2, or 1 to 5, or 10, or 15 g/m2/24 h. In a further embodiment, the flexible multilayer film has a WVTR value from 0 to 15, or from 0.2 to 10, or from 1 to 5 g/m2/24 h. Moreover, it may be desirable to use materials of construction having oil and/or chemical resistance particularly in the seal layer, but not limited to just the seal layer. The flexible multilayer film can be either printable or compatible to receive a pressure sensitive label or other type of label for displaying of indicia on the flexible container 10.
In an embodiment, each panel 18, 20, 22, 24 is made from a flexible multilayer film having at least one, or at least two, or at least three layers. The flexible multilayer film is resilient, flexible, deformable, and pliable. The structure and composition of the flexible multilayer film for each panel may be the same or different. For example, each of the four panels can be made from a separate web, each web having a unique structure and/or unique composition, finish, or print. Alternatively, each of the four panels can be the same structure and the same composition.
In an embodiment, each panel 18, 20, 22, 24 is a flexible multilayer film having the same structure and the same composition.
The flexible multilayer film may be (i) a coextruded multilayer structure, or (ii) a laminate, or (iii) a combination of (i) and (ii). In an embodiment, the flexible multilayer film has at least three layers: a seal layer, an outer layer, and a tie layer between. The tie layer adjoins the seal layer to the outer layer. The flexible multilayer film may include one or more optional inner layers disposed between the seal layer and the outer layer.
In an embodiment, the flexible multilayer film is a coextruded film having at least two, or three, or four, or five, or six, or seven layers. Some methods, for example, used to construct films are by cast co-extrusion or blown co-extrusion methods, adhesive lamination, extrusion lamination, thermal lamination, and coatings such as vapor deposition. Combinations of these methods are also possible. Film layers can comprise, in addition to the polymeric materials, additives such as stabilizers, slip additives, antiblocking additives, process aids, clarifiers, nucleators, pigments or colorants, fillers and reinforcing agents, and the like as commonly used in the packaging industry. It is particularly useful to choose additives and polymeric materials that have suitable organoleptic and or optical properties.
Nonlimiting examples of suitable polymeric materials for the seal layer include olefin-based polymer (including any ethylene/C3-C10 α-olefin copolymers linear or branched), propylene-based polymer (including plastomer and elastomer, random propylene copolymer, propylene homopolymer, and propylene impact copolymer), ethylene-based polymer (including plastomer and elastomer, high density polyethylene (“HDPE”), low density polyethylene (“LDPE”), linear low density polyethylene (“LLDPE”), medium density polyethylene (“MDPE”), ethylene-acrylic acid or ethylene-methacrylic acid and their ionomers with zinc, sodium, lithium, potassium, magnesium salts, ethylene vinyl acetate copolymers and blends thereof.
In an embodiment, the seal layer is a blend of an olefin-based polymer and a slip agent.
Nonlimiting examples of suitable olefin-based polymers for use in the seal layer blend include LLDPE (sold under the trade name DOWLEX™ (The Dow Chemical Company)), single-site LLDPE (substantially linear, or linear, olefin polymers, including polymers sold under the trade name AFFINITY™ or ELITE™ (The Dow Chemical Company)), propylene-based plastomers or elastomers such as VERSIFY™ (The Dow Chemical Company), and blends thereof.
A nonlimiting example of a suitable slip agent for use in the seal layer blend includes a fatty acid derivative. In an embodiment, the slip agent is an amide of a C18 to C24 fatty acid. In a further embodiment, the slip agent is an amide of a C22 mono-unsaturated fatty acid (e.g., erucamide)
Nonlimiting examples of suitable polymeric material for the outer layer include those used to make biaxially or monoaxially oriented films for lamination as well as coextruded films. Some nonlimiting polymeric material examples are biaxially oriented polyethylene terephthalate (BOPET), monoaxially oriented nylon (MON), biaxially oriented nylon (BON), and biaxially oriented polypropylene (BOPP). Other polymeric materials useful in constructing film layers for structural benefit are polypropylenes (such as propylene homopolymer, random propylene copolymer, propylene impact copolymer, thermoplastic polypropylene (TPO) and the like, propylene-based plastomers (e.g., VERSIFY™ or VISTAMAX™)), polyamides (such as Nylon 6, Nylon 6,6, Nylon 6,66, Nylon 6,12, Nylon 12 etc.), polyethylene norbornene, cyclic olefin copolymers, polyacrylonitrile, polyesters, copolyesters (such as PETG), cellulose esters, polyethylene and copolymers of ethylene (e.g., LLDPE based on ethylene octene copolymer such as DOWLEX™, blends thereof, and multilayer combinations thereof.
Nonlimiting examples of suitable polymeric materials for the tie layer include functionalized ethylene-based polymers such as ethylene-vinyl acetate (“EVA”), polymers with maleic anhydride-grafted to polyolefins such as any polyethylene, ethylene-copolymers, or polypropylene, and ethylene acrylate copolymers such an ethylene methyl acrylate (“EMA”), glycidyl containing ethylene copolymers, propylene and ethylene based olefin block copolymers (OBC) such as INTUNE™ (PP-OBC) and INFUSE™ (PE-OBC) both available from The Dow Chemical Company, and blends thereof.
The flexible multilayer film may include additional layers which may contribute to the structural integrity or provide specific properties. The additional layers may be added by direct means or by using appropriate tie layers to the adjacent polymer layers. Polymers which may provide additional mechanical performance such as stiffness or opacity, as well polymers which may offer gas barrier properties or chemical resistance can be added to the structure.
Nonlimiting examples of suitable material for the optional barrier layer include copolymers of vinylidene chloride and methyl acrylate, methyl methacrylate or vinyl chloride (e.g., SARAN resins available from The Dow Chemical Company); vinylethylene vinyl alcohol (EVOH), metal foil (such as aluminum foil). Alternatively, modified polymeric films such as vapor deposited aluminum or silicon oxide on such films as BON, BOPET, or OPP, can be used to obtain barrier properties when used in laminate multilayer film.
In an embodiment, the flexible multilayer film has a thickness from 100 micrometers (μm), or 200 μm, or 250 μm to 300 μm, or 350 μm, or 400 μm. In a further embodiment, the flexible multilayer film has a thickness from 100 to 400 μm, or from 200 to 350 μm, or from 250 μm to 300 μm.
In an embodiment, the panels 18, 20, 22 and 24 are made of the same seven-layer film, with structure and composition set forth in Table 1 below.
In an embodiment, the panels 18, 20, 22 and 24 are made of the same seven-layer film, with structure and composition set forth in Table 2 below.
In an embodiment, the panels 18, 20, 22 and 24 are made of the same seven-layer film, with structure and composition set forth in Table 3 below.
In an embodiment, the panels 18, 20, 22 and 24 are made of the same seven-layer film, with structure and composition set forth in Table 4 below.
The four panels 18, 20, 22, 24 extend toward a top end 44 to form the top portion I and extend toward the bottom end 46 to form the bottom portion III of the flexible container 10, as shown in
The top portion I includes a neck. In an embodiment, a portion of each of the four panels 18, 20, 22, 24 forms the top segment 28 and terminates at a neck 27, as shown in FIGS. 1 and 3. In this way, each panel extends from the bottom segment 26 to the neck 27. The neck 27 includes a fitment 30, as shown in
In an embodiment, an outer surface of the base of the fitment 30 has surface texture. The surface texture can include embossment and a plurality of radial ridges to promote sealing to the inner surface of the top segment 28.
The fitment 30 can generally be located anywhere on the top segment 28 of the flexible container 10. In an embodiment, the fitment 30 is positioned at a midpoint of the top segment 28 and can be sized smaller than a width of the flexible container 10, such that the fitment 30 can have an area that is less than a total area of the top segment 28. In a further embodiment, the fitment area is not more than 20% of the total top segment area. This can ensure that the fitment 30 will not be large enough to insert a hand therethrough, thus avoiding any unintentional contact with the flowable material 48 stored therein, as shown in
In an embodiment, the fitment 30 is a spout. In a further embodiment, the fitment 30 is a threaded spout, as shown in
In an embodiment, the fitment 30 includes a closure. The closure covers the fitment 30 and prevents the flowable material 48 from spilling out of the flexible container 10. The closure can be a removable closure. Nonlimiting examples of a removable closure include a threaded cap and flip-top cap. In an embodiment, the removable closure is a threaded cap 32, as shown in
In an embodiment, the closure is a dispensing closure. A nonlimiting example of a dispensing closure suitable for use includes a spigot. In an embodiment, the dispensing closure is a spigot 52, as shown in
The fitment 30, the threaded cap 32, and the spigot 52 can be made of a rigid construction and can be formed of any appropriate plastic, such as high density polyethylene (HDPE), low density polyethylene (LDPE), polypropylene (PP), and combinations thereof.
The body portion II of the flexible container 10 includes a chamber. A flowable material 48 is stored inside of the chamber, as shown in
In an embodiment, the flowable material 48 is a food product. Nonlimiting examples of food products suitable for storage within the chamber of the flexible container 10 include beverages such as water, juice, milk, syrup, carbonated beverages (beer, soft drinks), and fermented beverages (wine, scotch), salad dressings, sauces, dairy products, condiments (e.g., mayonnaise, mustard, ketchup), animal feed, and the like.
In an embodiment, the flowable material 48 is an industrial product. Nonlimiting examples of industrial products suitable for storage within the chamber of the flexible container 10 include oil, paint, grease, chemicals, cleaning solutions, washing fluids, suspensions of solids in liquid, and solid particulate matter (powders, grains, granular solids).
In an embodiment, the flowable material 48 is a squeezable product. The term “squeezable product,” as used herein, is a flowable material (i) with a viscosity greater than the viscosity of water, and (ii) that requires application of a squeezing force to the flexible container 10 in order to discharge the material from the chamber. Nonlimiting examples of squeezable products suitable for storage within the chamber of the flexible container 10 include grease, butter, margarine, soap, shampoo, animal feed, sauces, baby food, and the like.
The chamber of the flexible container 10 has a volume. In an embodiment, the volume of the chamber of the flexible container 10 is from 0.25 liters (L), or 0.5 L, or 0.75 L, or 1 L, or 1.5 L, or 2.5 L, or 3 L, or 3.5 L, or 4 L, or 4.5 L, or 5 L to 6 L, or 7 L, or 8 L, or 9 L, or 10 L, or 20 L, or 30 L. In a further embodiment, the volume of the chamber of the flexible container 10 is from 0.25 to 30 L, or from 0.5 to 10 L, or from 3 to 8 L.
The bottom portion III includes a bottom handle 14, as shown in
The bottom handle 14 includes a bottom handle opening 16. The bottom handle opening 16 can be any shape that is convenient to fit the hand and, in one embodiment, the bottom handle opening 16 can have a generally rectangular shape. In another embodiment, the bottom handle opening 16 can have a generally oval shape. Additionally, the bottom handle opening 16 can include a flap 38, as shown in
In an embodiment, the bottom handle 14 can be a “punch-out handle,” that is a handle formed by a process that cuts, or otherwise “punches” film material from the bottom 14, thereby removing film material from the flexible container 10. The punch-out handle does not have, or is otherwise void of, a flap.
In an embodiment, a portion of the bottom handle 14 attached to the bottom segment 26 includes a machine fold 42, (or score line), as shown in
The bottom handle 14 is disposed in a position. Positions of the bottom handle 14 include a storage position and an open position. As shown in
The flexible container 10 includes a front handle 82 and a rear handle 84, as shown in
In an embodiment, the rear handle 84 is integral with the rear panel 24. The rear handle 84 extends horizontally, or substantially horizontally, from the rear panel 24 and, in particular, can extend from the body portion II of the flexible container 10. The multilayer film that provides the rear panel 24 extends into the rear handle 84 and extends through the peripheral seal 41, as shown in
The front handle 82 and the rear handle 84 are in opposing relation to each other, as shown in
The front handle 82 and the rear handle 84 extend over the first gusseted side panel 18, as shown in
The front handle 82 includes a front flange 83 and an outer front handle 82a, as shown in
The rear handle 84 includes a rear flange 85 and an outer rear handle 84a, as shown in
The flexible container 10 includes a front handle opening 87 and a rear handle opening 89, as shown in
In an embodiment, either of the openings is a cutout section and includes a flap that comprises the cut material that forms each of the openings. For example, the front handle 82 includes a flap 39 as shown in
In an embodiment, the front handle 82 and the rear handle 84 are sealed together, as shown in
In an embodiment, the seal between the front handle 82 and the rear handle 84 encompasses the entire D-shaped areas of the outer front handle 82a and the outer rear handle 84a. In a further embodiment, the seal between the front handle 82 and the rear handle 84 is formed only between a distal end of the outer front handle 82a and a distal end of the outer rear handle 84a.
The front handle 82 includes a height H, as shown in
In a manner identical to the front handle 82, the rear handle 84 has a height that is not shown. The height of the rear handle 84 has a length that is from 1.0 to 1.2 times the length of the body section II, as shown in
The front handle 82 has a width W, as shown in
In a manner identical to the front handle 82, the rear handle 84 has a width that is not shown. The width of the rear handle 84 has a length that is from 0.5 to 1.0 times the length of the body section II, as shown in
The front panel 22 includes one or more front tabs and the rear panel 24 includes one or more rear tabs. In an embodiment, the front panel 22 includes front tabs 13a and 15a and the rear panel 24 includes rear tabs 13b and 15b, as shown in
Each of the front tabs 13a, 15a and the rear tabs 13b, 15b include a respective proximate end and a respective distal end. The proximate ends of the front tabs 13a, 15a and the proximate ends of the rear tabs 13b, 15b are adjacent to the top segment 28, as shown in
The front tab 13a and the rear tab 13b together form a tab pair 13. Each tab of the tab pair 13 is in opposing relation to the other, as shown in
In an embodiment, the front tab 13a and the rear tab 13b can be sealed together to form the tab pair 13 and the front tab 15a and the rear tab 15b can be sealed together to form the tab pair 15, as shown in
In an embodiment, the tabs 13a-15b have a square shape, as shown in
The present disclosure provides a process. The process includes providing a flexible container. The flexible container includes a front panel, a rear panel, a first gusseted side panel, and a second gusseted side panel. The gusseted side panels adjoin the front panel and the rear panel along peripheral seals to form a chamber. The panels form (i) a top portion, (ii) a body portion, and (iii) a bottom portion. The top portion includes a neck and a fitment in the neck. The front panel includes a front handle extending from the front panel. The rear panel includes a rear handle extending from the rear panel. The front handle and the rear handle are in opposing relation to each other. The front handle and the rear handle extend over the first gusseted side panel.
The process includes grasping the flexible container 10. The flexible container 10 is grasped by the front handle 82 and the rear handle 84, as shown in
The process includes lifting the flexible container 10. The flexible container 10 is lifted with the handles. In an embodiment, the tab pair 13 can be grasped as the flexible container 10 is lifted with the handles, as shown in
The process includes carrying the flexible container 10. The flexible container 10 is carried with the handles, as shown in
The process includes dispensing the flowable material. An open flexible container 12 can be lifted with the handles, as shown in
In an embodiment, the container 58 is a container, such as a glass, for example.
The open flexible container 12 is lowered onto the support surface and returned to the upright position, as shown in
In an embodiment, the fitment of the flexible container 10 incudes a spigot 52, as shown in
By way of example, and not by limitation, some embodiments of the disclosure will now be described in detail in the following Examples.
The raw materials used to prepare the individual film layers of the multilayer films are provided in Table 5 below.
The structure of Film 1 used to produce the flexible containers is provided in Table 6 below.
The multilayer film is fabricated using a 7-layer Alpine blown film line and has an A/B/C/D/E/F/G structure. Layer “A” is the outer (i.e., skin) layer and layer “G” is the seal layer.
The “Layer %” value in Table 6 is the proportion of each layer in the multilayer film. The thickness of each layer is determined by multiplying the “Layer %” value by the total thickness of the multilayer film.
The total thickness of the multilayer film is 200 microns.
The 7-layer film of Table 6 is used to produce a four panel flexible container 10 with a front handle and a rear handle, as shown in
It is specifically intended that the present disclosure not be limited to the embodiments and illustrations contained herein, but include modified forms of those embodiments including portions of the embodiments and combinations of elements of different embodiments as come with the scope of the following claims.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/US2020/034814 | 5/28/2020 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 62855314 | May 2019 | US |
