Packaging systems for finished products

Abstract

The present invention relates to a system comprising at least one primary package containing at least one article and a secondary package containing the primary package, wherein the secondary package comprises a second packaging material having a water vapor transmission rate of less than about 100 g / m2 as measured according to a water vapor transmission rate test 2 / day water vapor transmission rate, and a compression resistance greater than about 150N.

Description

Technical Field

[0001] The invention relates to an environmentally friendly packaging system. Background Art

[0002] Environmentally friendly products are currently at the forefront of many consumers' attention. People are paying more and more attention to products from sustainable sources. For example, there is a strong desire in the market to produce consumer products that include natural materials, biologically derived materials and / or recycled materials. On the disposal side, people are paying more and more attention to products that are biodegradable, compostable, recyclable, reusable and / or otherwise cause minimal landfill waste.

[0003] In the case of disposable absorbent articles, at least one article is contained in a primary package or a shelf package, and at least one primary package is contained in a secondary package for shipping and storage.

[0004] Flexible materials are often used where the product can form a shelf-stable surface. In some cases, plastics are preferred over paperboard because, given the ability of plastics to bend and stretch, plastics can withstand far more rigor in the packaging process than paperboard. In addition, plastics can exhibit barrier properties, protecting the products within the plastic packaging from environmental moisture. One of the common primary packaging is the polyethylene film bag. An alternative to polyethylene film bags, primary packaging made of natural biodegradable materials ("NBM") such as polyvinyl alcohol, paper, etc. degrades in natural conditions (soil, municipal water, oceans), and can reduce environmental stress and please consumers with improved sustainability. It is expected that biodegradable materials will resist many environmental factors during application, but will be biodegradable under disposal conditions. However, NBMs typically have low moisture barriers to protect the internal products from moisture absorption.

[0005] In order to ship the primary package to the retailer or consumer, a secondary package may be used. The secondary package typically includes a plurality of primary packages therein. In order to reduce the rate at which moisture is absorbed by an article such as an absorbent article, these secondary packages may preferably be provided with a film layer on the inside and / or outside.

[0006] There are secondary packaging materials that have met certain standards. Examples of secondary packaging include cartons and cartons laminated with plastic film layers disposed on the inner and / or outer surfaces of the cartons to enhance the barrier properties of the cartons. Although the film layer may be recyclable, the film layer should be separated from the cartons before recycling. Paperboard packaging, because paperboard is derived from wood pulp, can be one or both of sustainable sources and recyclable, but it is susceptible to external damage and provides a very low moisture barrier. Plastic film bags are lightweight, therefore saving energy in transportation compared to paperboard-based secondary packaging, but do not have the desired mechanical properties to withstand the rigors of the packaging process and transportation.

[0007] As an example, many absorbent articles on the market utilize superabsorbent polymers within their absorbent systems. These superabsorbent polymers are designed to quickly absorb and incorporate liquid insults into absorbent articles. Unfortunately, these superabsorbent polymers may also be very effective in absorbing liquid vapor (i.e., moisture) from the environment. This absorbed moisture from the environment may be a problem, especially when the absorbent article contains a wet indicator. Some types of absorbent articles, such as baby diapers, have wet indicators that are utilized by caregivers and potential wearers to identify when the absorbent article has absorbed liquid insults. These wet indicators can be activated while still in the package, while allowing the absorbent article to absorb moisture from the environment without any barriers that inhibit such absorption.

[0008] The rapid development of e-commerce and modern logistics and transportation industries require packaging that is lightweight to save courier fees and effort and still mechanically strong enough to resist damage such as puncture to physically protect the primary packaging and the internal products during transportation.

[0009] There is an increasing public demand for packaging systems that can enhance the recycling efficiency of packaging materials.

[0010] Additionally, there is an increasing public demand for packaging systems that exhibit adequate barrier properties and mechanical strength. Summary of the invention

[0011] The present invention provides a packaging system comprising at least one primary package containing at least one article and a secondary package containing the primary package, wherein the secondary package comprises a second packaging material having a water vapor transmission rate of less than about 100 g / m 2 / day water vapor transmission rate, and a compression resistance greater than about 150N.

[0012] The present invention provides a packaging system comprising a primary package containing at least one article and a secondary package containing the primary package, wherein the primary package comprises a biodegradable material, a recyclable material, or a combination thereof, and wherein the secondary package has a water vapor transmission rate of less than about 100 g / m 2 / day water vapor transmission rate, and a compression resistance greater than about 150N.

[0013] For the convenience of discussion, the invention disclosed herein may be discussed with reference to the referenced figures in the drawings. However, unless otherwise explicitly indicated, the drawings and detailed description should not be considered to limit the scope of the claims, and the invention disclosed herein is also suitable for packaging a variety of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A A perspective view of an exemplary packaging system of the present invention is shown.

[0015] Figure 1B Shows Figure 1A Front view of the packaging system.

[0016] Figure 1C Shows Figure 1A Top view of the packaging system.

[0017] Figure 1D Shows Figure 1A Side view of the packaging system.

[0018] Figure 2A is a schematic diagram of an exemplary primary package in an opened state.

[0019] Figure 2B is a schematic diagram of an exemplary primary package.

[0020] Figure 2C is a schematic diagram of another primary packaging.

[0021] Figure 3 Contains absorbent products Figure 2B Schematic cross-sectional view of a package showing an absorbent article therein.

[0022] Figure 4 is a schematic diagram of an absorbent article of the present invention in the form of a sanitary napkin showing a partial cross-sectional view of the article.

[0023] Figure 5 shows a plan view of an exemplary absorbent article in the form of a taped diaper, with the garment-facing surface facing the viewer, in a flat, unfolded condition;

[0024] Fig. 6A A perspective view of an exemplary secondary packaging is shown.

[0025] Figure 6B Shows Fig. 6A Front view of the packaging.

[0026] Figure 6C Shows Fig. 6A Side view of the packaging.

[0027] Fig.6D Shows Fig. 6A view of packaging.

[0028] Fig. 7A A perspective view of another exemplary secondary packaging is shown.

[0029] Figure 7B Shows Fig. 7A Front view of the packaging.

[0030] Figure 7C Shows Fig. 7A view of packaging.

[0031] Fig.7D Shows Fig. 7A view of packaging.

[0032] Fig. 8A A flat view of the air column membrane material is shown.

[0033] Figure 8B Shown by Fig. 8A The bag-like structure is made of air column membrane material.

[0034] Figure 8C Shown from Figure 8B The inflatable packaging with a bag-like structure and an open end.

[0035] Fig.8D Shown by Figure 8C An inflatable sealed air column package made of an inflatable package with an open end.

[0036] Fig. 8E Shown by Fig.8D Side view of secondary packaging made of inflatable sealed air column packaging. DETAILED DESCRIPTION

[0037] As used herein, the term "absorbent article" refers to a device that absorbs and contains exudates, and more specifically refers to a device that is placed close to or adjacent to the body of the wearer to absorb and contain various exudates discharged from the body. The absorbent articles of the present invention include, but are not limited to, diapers, adult incontinence briefs, training pants, swim pants, diaper holders, diaper outer covers, absorbent inserts for diaper outer covers, catamenial pads, incontinence pads, liners, sanitary pads, tampons, durable menstrual pants, etc.

[0038] As used herein, the term "biodegradable" means that a material or packaging is capable of natural decomposition. Biodegradable materials can degrade relatively quickly into simple stable compounds due to the action of bacteria and decompose into elements such as carbon that is naturally recycled. Biodegradable packaging can be made of biodegradable materials as the main component of the packaging. The term "biodegradable" can refer to a material that reaches a biodegradation percentage higher than 90% within 6 months according to ISO 17556, absolutely or relative to a reference.

[0039] Unless otherwise specified, as used herein, the term "cellulose-based fibers" may include cellulose fibers (such as wood fibers), cotton, regenerated cellulose fibers (such as viscose fibers), lyocell fibers, rayon or cuprammonium rayon, and high-yield pulp fibers. The term "cellulose-based fibers" also includes chemically treated natural fibers (such as mercerized pulp), chemically hardened or cross-linked fibers, or sulfonated fibers. Also included are mercerized natural fibers, regenerated natural cellulose fibers, cellulose produced by microorganisms, rayon processes, cellulose dissolution and coagulation spinning processes, and other cellulose materials or cellulose derivatives. Other cellulose-based fibers included are waste paper or recycled fibers and high-yield fibers. High-yield pulp fibers are those fibers produced by pulping processes that provide a yield of about 65% or more, more specifically about 75% or more, and more specifically about 75% to about 95%. The yield is the amount of processed fiber obtained expressed as a percentage of the initial wood mass. Such pulping processes include bleached chemi-thermomechanical pulp (BCTMP), chemi-thermomechanical pulp (CTMP), pressure / pressure thermomechanical pulp (PTMP), thermomechanical pulp (TMP), thermomechanical chemical pulp (TMCP), high-yield sulfite pulp, and high-yield kraft pulp, all of which result in fibers with high levels of lignin but are still considered natural fibers. High-yield fibers are well known for their stiffness in both the dry and wet states relative to typical chemical pulped fibers.

[0040] As used herein, the term "cross direction" or "CD" refers to the path in the plane of a material (such as a film) that is perpendicular to the machine direction.

[0041] As used herein, the term "machine direction" or "MD" refers to the path that a material, such as a film, travels through a manufacturing process.

[0042] As used herein, the term "natural fibers" refers to fibers including cellulose-based fibers, bamboo-based fibers, and the like. Natural fibers also refer to non-wood fibers such as cotton, abaca, kenaf, Indian grass, flax, North African reed grass, straw, jute, bagasse, milkweed filaments, and pineapple leaf fibers; and wood fibers, wood or pulp fibers, such as those obtained from deciduous and coniferous trees, including softwood fibers such as northern and southern softwood kraft fibers; hardwood fibers such as eucalyptus, maple, birch, and poplar. Pulp fibers can be prepared in high-yield or low-yield forms and can be pulped by any known method, including kraft pulping, sulfite pulping, high-yield pulping methods, and other known pulping methods. Natural fibers can be recycled natural fibers, virgin natural fibers, or mixtures thereof.

[0043] The packaging system according to the present invention comprises at least one primary package containing at least one article and a secondary package containing the primary package.The packaging system of the present invention can be recycled more efficiently.

[0044] The primary packaging and / or secondary packaging of the present invention can be in numerous configurations containing one or more articles. For example, the primary packaging and / or secondary packaging can include multiple panels, including a consumer-facing panel, i.e., a front panel. The consumer-facing panel in the primary packaging is the face of the primary packaging that faces the consumer when it is on the shelf. Generally speaking, the consumer-facing panel includes brand and / or packaging information, each of which is described in detail in this article. The consumer-facing panel in the secondary packaging is the face of the secondary packaging that corresponds to the consumer-facing panel of the primary packaging when the primary packaging is in the secondary packaging.

[0045] Figure 1A-Figure 1D A perspective view, a front view, a top view and a side view of an exemplary packaging system 1 according to the present invention are shown respectively.The packaging system 1 comprises a primary package 100 and a secondary package 200 containing at least one article.

[0046] The packaging system of the present invention may include at least one primary package containing at least one article and a secondary package containing the primary package, wherein the secondary package has a compression resistance greater than about 150N and has a puncture resistance greater than about 7 Joules as measured according to the Puncture Resistance Test.

[0047] The packaging system of the present invention may include at least one primary package containing at least one article and a secondary package containing the primary package, wherein the secondary package has a water vapor transmission rate of less than about 100 g / m 2 / day water vapor transmission rate, and having a basis weight of about 80 gsm to about 220 gsm.

[0048] The packaging system of the present invention may include at least one primary package containing at least one article and a secondary package containing the primary package, the primary package comprising a secondary package that exhibits a moisture vapor transmission rate greater than about 200 g / m as measured according to the Water Vapor Transmission Rate Test. 2 / day, wherein the primary packaging exhibits a moisture pick-up of less than 2% as measured according to the Moisture Pick-up test.

[0049] The packaging system of the present invention may include at least one primary package containing at least one article and a secondary package containing the primary package, the primary package having an MD tensile strength of not less than about 0.55 N / mm as measured according to the Tensile Strength Test, wherein the secondary package has a compression resistance greater than about 150 N and has a puncture resistance greater than about 7 Joules as measured according to the Puncture Resistance Test.

[0050] The packaging system of the present invention may include at least one primary package containing at least one article and a secondary package containing the primary package, the primary package having a moisture absorption of less than 2% as measured according to the Moisture Absorption Test, wherein the secondary package has a puncture resistance greater than about 7 Joules as measured according to the Puncture Resistance Test.

[0051] In one embodiment, the packaging system of the present invention comprises a primary packaging comprising a biodegradable material, a recyclable material or a combination thereof. In another embodiment, the packaging system of the present invention comprises a primary packaging comprising a recyclable material and a secondary packaging comprising a recyclable material. In another embodiment, the packaging system of the present invention comprises a primary packaging comprising a biodegradable material and a secondary packaging comprising a recyclable material. In another embodiment, the packaging system of the present invention comprises a primary packaging comprising a biodegradable material and a secondary packaging comprising an inflated film material recyclable material. In another embodiment, the packaging system of the present invention comprises a primary packaging comprising a recyclable material and a secondary packaging comprising an inflated film material.

[0052] Primary Packaging

[0053] The primary package in the present invention may be any package that can contain at least one article.

[0054] The primary package in the present invention may be formed of one or more sheets of plastic film. "Film" means a sheet structure having a certain length, width and thickness (thickness), wherein each of the length and width greatly exceeds the thickness, i.e., exceeds 1,000 times or more, and the structure has one layer (monolayer) or more adjacent layers (multilayer), each layer being a substantially continuous structure formed of one or more thermoplastic polymer resins (including blends thereof). The film may be a single layer (monolayer), or may have two, three or more layers (multilayer).

[0055] The plastic film may include a matrix polymer such as a polyolefin including polyethylene, polypropylene, polybutadiene, polypropylene-ethylene copolymers and copolymers with at least one olefinic component, and any mixture thereof. The film may include a small amount of one or more additives. Some non-limiting examples of the additive types contemplated include spices, dyes, pigments, nanoparticles, antistatic agents, fillers and combinations thereof.

[0056] Plastic films may contain non-biodegradable polymers.

[0057] Examples of non-biodegradable options include polyolefin materials, such as: polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). Examples of polyethylene may include high-density polyethylene, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene - including all homopolymers and copolymers of those materials. Other examples of non-biodegradable options may include various Surlyn resins; copolymers of styrene-butadiene, such as acrylonitrile-butadiene; acrylic acid copolymers; acrylate copolymers (including methyl methacrylate); acetate copolymers, including EVA (ethylene vinyl acetate). In some cases, the polymer may include filler additives such as clays (e.g., kaolin) and other mineral additives such as CaCO 3 or TiO 2 .

[0058] The plastic film may comprise a biodegradable polymer. In one embodiment, the plastic film may be biodegradable. Some examples of biodegradable options include aliphatic aromatic polyesters (e.g., ), certain thermoplastic starches (e.g. MATER-BI from Novamont or ), polybutylene succinate and copolymers thereof (e.g., from ShoWa High Polymer Co. or PBSA from Mitsubishi Chemicals), polycaprolactone, and mixtures thereof. Other suitable polymers include polyhydroxyalkanoates (PHA) and PHA copolymers, such as poly(β-hydroxyalkanoate), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) NODAX from Danimer TMand poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) from Kaneka. Other PHA copolymers can be synthesized by methods known to those skilled in the art, such as by microorganisms, ring-opening polymerization of β-lactones, dehydration polycondensation of hydroxyalkanoic acids, and dealcoholization polycondensation of hydroxyalkanoic acid alkyl ethers, as described in Volova, "Polyhydroxy Alkanoates Plastic Materials of the 21 "Century: Production, Properties and Application, Nova Science Publishers, Inc., (2004), incorporated herein by reference. Additional examples are polylactic acid (PLA), polyvinyl alcohol (PVA), polyglycolic acid, polypropylene carbonate, and copolymers thereof. Biodegradable primary packaging can be degraded by microorganisms and therefore poses less environmental burden than non-degradable primary packaging.

[0059] The properties of the first packaging material are regarded as properties of the first package made from the first packaging material.

[0060] When the primary packaging comprises a film material, the film may exhibit a thickness of at least 40 μm, or at least 50 μm, or at least 60 μm, specifically enumerating all values ​​within these ranges and any ranges derived therefrom, so that the material can ensure good quality perceived intuitively by consumers. Thickness is measured using ISO 534 as modified herein.

[0061] The primary package of the present invention may have an MD tensile strength of at least 0.55 N / mm, or at least 0.7 N / mm, or at least 0.9 N / mm to survive high speed packaging lines.

[0062] In a primary package, MD tensile strength is the tensile strength of the packaging material in the MD direction, or the direction from the top panel to the bottom panel of the primary package.

[0063] It is noteworthy that the film can be laminated, coated or otherwise joined to another layer, such as a paper layer, a metal layer and a metallized layer. The paper layer herein is intended to include a paper layer made of natural fibers, synthetic fibers or any combination thereof. The metal layer herein is intended to include foils such as made of aluminum, copper and other suitable metals or alloys. The metallized layer herein is intended to include a polymer film having a metal thin layer or metal oxidized via a suitable metallization process, such as vacuum metallization or sputtering metallization.

[0064] The primary packaging in the present invention may be formed from paper. As used herein, "paper" in relation to paper is intended to include synthetic fibers as well as natural fibers, such as cotton, silk, wool, hemp, pulp, etc.; or regenerated fibers, such as rayon, cuprammonium fibers. For example, the paper layer comprises cellulose-based fibers. Unless otherwise indicated, as used herein, the term "cellulose-based fibers" is intended to include both cellulose fibers (such as pulp and cotton) and regenerated cellulose fibers (such as rayon). Synthetic paper can be made from a composition comprising plastic fibers, such as polyethylene and polypropylene, etc.

[0065] In one embodiment, the primary packaging of the present invention comprises a biodegradable packaging material. Biodegradable packaging materials include biodegradable polymers and natural fibers. Biodegradable packaging materials can be materials that achieve a biodegradation percentage higher than 90% within 6 months according to ISO17556, absolutely or relative to a reference. In another embodiment, the primary packaging in the present invention is biodegradable.

[0066] Primary packaging can include a packaging material containing natural fibers. The packaging material can include at least 50% by weight of natural fibers, or at least 70% by weight of natural fibers, or at least 90% by weight of natural fibers, specifically enumerating all values ​​in these ranges and any scope resulting therefrom. For example, the packaging material can include 95% by weight of natural fibers. The packaging material of the present invention can include natural fibers between 50% by weight and 100% by weight, or between 70% by weight and 99.9% by weight, or between 90% by weight and 99.9% by weight. It should be noted that, in the case where the weight percentage of natural fibers is less than 100%, if necessary, there is space for coating, colorant, film and / or adhesive. The basis weight of the packaging material comprising natural fibers can have a basis weight between 50gsm and 120gsm, or between 60gsm and 105gsm, or between 70gsm and 90gsm, specifically enumerating all values ​​in these ranges and any scope resulting therefrom. Basis weight may be determined according to ISO 536 as modified herein.

[0067] The primary packaging may comprise recyclable packaging material. With regard to the recyclability of packaging materials, there is no uniform standard for determining the recyclability of a material. Generally speaking, the higher the percentage yield of natural material, the more likely it is that the material can be recycled in traditional paper recycling channels.

[0068] In order to increase the possibility that packaging material can be recycled, the total weight percentage of the non-recyclable material (such as adhesive, film, coating and / or colorant) in the packaging material of the present disclosure can be carefully selected.For example, packaging material of the present disclosure can include 50 % by weight or less, 30 % by weight or less or about 15 % by weight or less non-recyclable material, specifically including all values ​​in these scopes and any scope resulting therefrom.For another example, packaging material of the present disclosure can include about 0.1 % by weight to about 50 % by weight, about 0.1 % by weight to about 30 % by weight or about 0.1 % by weight to about 15 % by weight non-recyclable material, specifically including all values ​​in these scopes and any scope resulting therefrom.If it is desired to increase the possibility of recycling capacity, the weight percentage of non-recyclable material can be 5 % by weight or less, or between 0.1 % by weight to 5 % by weight, specifically enumerates all values ​​in these scopes and any scope resulting therefrom.

[0069] The effectiveness of the recycling process to the packaging material of the present disclosure can be measured via the recyclable percentage. The packaging material of the present disclosure can show 60% or greater, 80% or greater or 90% or greater recyclable percentage, specifically enumerating all values ​​in these scopes and any scope resulting therefrom. The packaging material of the present disclosure can have 60% to about 99.9%, more preferably about 80% to about 99.9%, or most preferably about 90% to about 99.9% recyclable percentage, specifically enumerating all values ​​in these scopes and any scope resulting therefrom. In a specific example, the packaging material of the present disclosure can show about 90% to about 99.9%, more preferably about 94% to about 99.9%, or most preferably about 96% to about 99.9% recyclable percentage, specifically including all values ​​in these scopes and any scope resulting therefrom. The recyclability percentage of the packaging material of the present disclosure can be determined via test PTS-RH:021 / 97 (October 2019) under Category II, as performed by Papiertechnische Stiftung, located at Pirnaer Strasse 37, 01809 Heidenau, Germany.

[0070] Primary packaging of the present invention can comprise the shape of roughly cuboid.Therefore, in addition to the panel facing the consumer, primary packaging of the present invention can also comprise the back panel relative to the panel facing the consumer, the left panel placed between the panel facing the consumer and the back panel, the right panel relative to the left panel, the bottom panel placed between the panel facing the consumer and the back panel and the top panel relative.Other packaging shapes are contemplated.Other examples are contemplated, wherein a packaging shape including less than six panels is formed.Based on these examples, primary packaging having a circular or semicircular shape when observed from the bottom panel is contemplated.In addition, primary packaging having a triangular shape when observed from the bottom panel is contemplated.

[0071] In one embodiment, the primary packaging is made of a plastic film. Figure 2A-2C , the packaging material sheet can be appropriately folded to form bag side folds 12b and 13b, and two side folds 12a and 13a are formed on opposite sides to form a bag structure 4 having a first surface 10, a second surface 12 and a third surface 13, and a fourth surface 14 and a fifth surface 15, respectively. The open end 48 (e.g., a bag structure with a gusset) is opposite to the first surface 10. Each side fold 12b, 13b is located at the corresponding second surface 12 or third surface 13. It is worth noting that in Figure 2A and Figure 2B In the example shown, the folds and creasing are for a package having a block configuration or a block bottom configuration. Figure 2B It will be appreciated that the open end 48 opposite the first surface 10 can then be closed to form the sixth surface 11. Any suitable form of closure can be utilized. For example, the sixth surface can include a closed gusset 11b formed by bringing together the edges of the bag 4 and bonding them together to form a closed seam 11a and a closed seam flap 11c extending from the closed seam 11a and the sixth surface 11. For another example, the sixth surface can include seams joined together in a block configuration or a cross configuration as discussed below. Return to Reference Figure 2A-2C The dimensions of the bag 4 and the primary package 100 can be appropriately selected and realized through design, folding, stacking, compression and packaging processes so that the primary package 1 retains the absorbent article therein and maintains the simple, stable, substantially parallelepiped shape, i.e., a rectangular parallelepiped shape, of the primary package 100.

[0072] The primary package of the present invention contains at least one article. The primary package of the present invention can contain a plurality of compressed articles, such as compressed disposable absorbent articles. For example, the primary package of the present invention can be used to contain feminine hygiene pads. Figure 3As shown, the primary package 100 defines an interior space 1002 in which a plurality of absorbent articles 1004 are located. The plurality of absorbent articles 1004 may be arranged in one or more stacks 1006. The absorbent articles may be stacked under compression to reduce the size of the package while still providing a sufficient amount of absorbent articles per package.

[0073] Secondary Packaging

[0074] The packaging system of the present invention comprises a secondary package housing at least one primary package.

[0075] The moisture barrier of the secondary packaging of the present invention slows down the absorption of moisture by the primary packaging and the articles therein. The moisture barrier properties of the secondary packaging material are considered to be the barrier properties of the secondary packaging made from the secondary packaging material. The secondary packaging material or moisture barrier of the secondary packaging in the present invention can be measured via ASTM E96, i.e., water vapor transmission rate "WVTR" under stress conditions specified at the water vapor transmission rate described herein. This test can provide useful information about the moisture vapor transmission of the packaging material. Given that there are several regions around the world with increased temperatures and often increased relative humidity, the inventors conducted the ASTM E96 WVTR test under stress conditions of 40°C and 75% relative humidity.

[0076] The secondary packaging of the present invention comprises a water vapor transmission rate of less than about 100 g / m 2 / day or less than about 95g / m 2 / day or less than about 90g / m 2 / day water vapor transmission rate, specifically reciting all values ​​within these ranges and any ranges derived therefrom. 2 A secondary packaging having a water vapor transmission rate of 100 Å / day can effectively reduce moisture transfer through the secondary packaging and reduce the likelihood of premature activation of the wetness indicator when the packaging system contains a disposable absorbent article.

[0077] In addition, the secondary packaging of the present invention helps stabilize the primary packaging and withstands the weight of the stacked packaging during storage and transportation to retailers and consumers. The secondary packaging of the present invention has a compression resistance greater than about 150N, or greater than about 160N, or greater than about 170N, specifically reciting all values ​​within these ranges and any ranges derived therefrom. When the secondary packaging has a compression resistance less than about 150N, the secondary packaging may deform and collapse when stacked during storage and transportation.

[0078] In addition, the secondary packaging of the present invention can have a level of mechanical strength to withstand the rigors of the packaging process and provide protection from environmental insults during shipping and while on a storage shelf, and to protect the product while in the consumer's home. In one embodiment, the secondary packaging of the present invention has a puncture resistance greater than about 7 Joules, or greater than about 10 Joules, or greater than about 15 Joules as measured according to the Puncture Resistance Test disclosed herein, with all values ​​within these ranges and any ranges derived therefrom being specifically recited.

[0079] The secondary packaging of the present invention may comprise a plastic film. The secondary packaging of the present invention may consist essentially of a plastic film. The secondary packaging material may be recyclable in a plastic film recycling operation, such as that developed by Cadel Deinking, in which flexible plastic packaging films are recycled, including deinking, to obtain a recycled plastic having a quality similar to that of new plastic (https: / / cadeldeinking.com / en / ). Another option for recycling the secondary packaging material of the present invention may be in a recycling operation, such as the PURECYCLE technology (https: / / purecycle.com / ).

[0080] The plurality of secondary packages can remain wrapped until the seller of the merchandise needs to open the package. Similarly, the secondary packages can remain sealed until the primary package therein is needed. Each of the secondary packages can contain packaging information providing instructions on how and / or when to open.

[0081] Where the packaging system of the present invention includes absorbent articles and the secondary packaging has an adequate barrier to moisture absorption, the wetness indicator within the absorbent article and the SAP will have a longer shelf life. In one embodiment, the primary package containing at least one article has a moisture absorption of less than 2%, or less than about 1.8%, or less than about 1.5%, or less than about 1.2% as measured according to the Moisture Absorption Test.

[0082] The secondary packaging can have a basis weight of about 80 gsm to about 220 gsm, or about 90 gsm to about 210 gsm, or about 120 gsm to 145 gsm, specifically reciting all values ​​within these ranges and any ranges derived therefrom.Basis weight can be determined via ISO 536 as modified herein.

[0083] The secondary packaging of the present invention may include a plurality of seals. A seal is a seam of packaging material that has been attached to one another. A seal is an area of ​​packaging where at least two portions of packaging material can overlap one another. A seal is created when the at least two portions of packaging material are joined to one another in a seam. When the secondary packaging comprises a plastic film, the seal may be created by heat sealing the film layer to itself with or without the use of an adhesive. The seal is important to ensure that the secondary packaging of the present invention can prevent moisture transfer within the secondary packaging.

[0084] It is worth noting that corrugated paper boxes, paperboard boxes and film-coated corrugated paper boxes / paperboard boxes commonly used as secondary packaging in packaging have high WVTR values ​​and cannot provide the desired barrier properties. The secondary packaging in the present invention is sealed so that the internal primary packaging is completely enclosed by the secondary packaging and protected from the external environment.

[0085] In one embodiment, the secondary packaging of the present invention comprises an air-filled packaging material, such as Figure 1A-Figure 1D and Figure 6A-Figure 8E As illustrated in . The inflatable packaging may include multiple inflatable columns. Examples of inflatable packaging materials are disclosed, for example, in US10,526,126B and US 2020 / 0140178A.

[0086] Figure 6A-6D A secondary packaging of an inflatable film comprising a plurality of inflatable columns is shown. Figure 7A-7D Another example of a secondary package of an inflatable film including a plurality of inflatable columns is shown. The secondary package made of an inflatable film including a plurality of inflatable columns has a desired physical strength to withstand the rigors of shipping and transportation. The secondary package made of an inflatable film including a plurality of inflatable columns can be transparent or translucent so that graphics such as trademarks and product information on the primary package are visible. A sticker in which the packaging information provides instructions on how and / or when to open can be provided on the outer surface of the secondary package.

[0087] Even without the primary packaging, the secondary packaging of the present invention can be self-supporting.

[0088] The secondary packaging of the present invention can maintain a stable, substantially parallelepiped shape, and can include a roughly cuboid shape. Therefore, in addition to the front panel corresponding to the panel facing the consumer in the primary packaging, the secondary packaging of the present invention can also include a rear panel relative to the front panel, a left panel placed between the front panel and the rear panel, a right panel relative to the left panel, a bottom panel placed between the front panel and the rear panel, and a relative top panel. Other packaging shapes are contemplated. Other examples are contemplated, wherein a packaging shape including less than six panels is formed. Based on these examples, a primary packaging having a circular or semicircular shape when observed from the bottom panel is contemplated. In addition, a primary packaging having a triangular shape when observed from the bottom panel is contemplated.

[0089] In one embodiment, the secondary packaging comprises a gas-filled column of material and is in the shape of a rectangular parallelepiped, such as Figure 1A-Figure 1D and Figure 6A-Figure 8E . The secondary package may have a plurality of inflatable columns in a vertical orientation when the secondary package is in a standing position. The secondary package may have a plurality of inflatable columns in a direction from the top panel to the bottom panel of the secondary package. Such a structure of a secondary package having a plurality of inflatable columns in a vertical orientation or in a direction from the top panel to the bottom panel of the second package when the secondary package is in a standing position can enable the secondary package to have a desired physical strength, such as a compression resistance greater than about 150N.

[0090] refer to Figure 8A-8E , an exemplary inflatable secondary packaging is explained. Fig. 8A An exemplary planar inflatable film 210 from which an inflatable secondary package can be prepared is shown. The inflatable film 210 includes a plurality of air columns 211. Fig. 8A and Figure 8B , each air column 211 includes a first film layer 201 and a second film layer 202. The first film layer 201 and the second film layer 202 overlap each other, and form a tubular chamber 212 and a chamber opening 213 in each air column 211, wherein the tubular chamber 212 is in communication with the chamber opening 213. Two adjacent air columns 211 are separated by a heat-sealed separation seam 215. Each one-way valve 214 is disposed at each chamber opening 213, so that each tubular chamber 212 can be inflated with air (or gas) via each chamber opening 213. When the inflation process is completed, the pressure in each tubular chamber 212 reaches a predetermined value, and each one-way valve 214 can be automatically sealed to prevent gas leakage from each tubular chamber 212. The planar inflatable membrane 210 includes an area 209 of a high-density point seal 208.

[0091] The first film layer 201 and the second film layer 202 can be selectively sealed to form one or more curved seams 207. Both side ends of each curved seam 207 do not extend to the separation seam 215 forming the tubular chamber 212, so that the curved seam 207 does not block the air flow and the air can flow along the tubular chamber 212. The curved seams 207 can be formed to be arranged to form a line to form an inflatable package. The inflatable film 210 can have more than one curved seam 207. After each air column 211 is filled with air or gas, each air column 211 can be bent at the position of the curved seam 207 to form multiple side walls. Figure 8B and Figure 8C The bag-like structure 220 is formed by folding the first side 203 and the opposing second side 204 of the planar inflatable membrane 210 together via heat sealing to form a seal 224, and the overlapping third side 205 of the planar inflatable membrane 210 is heat sealed to form a closed end 226. Fig. 8A The planar inflatable membrane 210 in FIG. Figure 8C The bag-like structure 220 has a bottom wall, four side walls and an open end when erected so as to automatically form a receiving cavity. The fourth side 206 of the planar inflatable membrane 210 forms an open end 227 in the bag-like structure 220. 222a, 222b, 222c and 222d are non-inflated portions of the area 209 corresponding to the high-density point seal 208 in the planar inflatable membrane 210.

[0092] One or more primary packages containing at least one article are inserted into the bag-like structure 220 via the open end 227, and the open end 227 is heat sealed to form an airtight package 230. Fig.8D After the primary package is inserted and the open end 227 is heat sealed, the air column 211 is inflated with gas through the inflation port to form an inflated structure 230. The area 209 of the high-density point seal 208 in the inflatable film 210 forms a non-inflated structure 234 at the corresponding position, i.e., a triangular corner. Fig. 8E , insert the four triangular corners to form a rectangular inflatable package 200. For simplicity, Figure 8C-Figure 8E No primary packaging is indicated.

[0093] Conventional corrugated paper-based boxes do not have desired mechanical properties, such as high puncture resistance. In addition, these boxes have a higher basis weight than the packaging material of the present invention to provide the required mechanical strength, such as compression resistance.

[0094] Despite having a lower basis weight than cardboard and paperboard, the secondary packaging of the present invention can withstand the rigors of the manufacturing process in which the primary package is placed within the package, as well as the rigors of shipping, provide protection from environmental insults during shipping, and provide product protection at the consumer's location.

[0095] Products

[0096] The primary package in the present invention contains at least one article. When the article can be packaged and transported using the packaging disclosed herein, there is no critical limitation on the article. The article can be a disposable absorbent article.

[0097] Absorbent products

[0098] In some embodiments, the article is an absorbent article, such as a diaper and / or training pants containing an absorbent material such as a superabsorbent polymer ("SAP"). Absorbent articles with a large amount of SAP (usually absorbent gelling material) may also have problems with humid environments. For example, the SAP in these absorbent articles may change color after absorbing a certain amount of moisture from the environment in the form of water vapor. Unfortunately, this color change can cause similar problems in the wearer or caregiver.

[0099] In addition, the inventors have surprisingly found that although SAP effectively absorbs moisture from its environment in the form of water vapor, its absorption of water vapor will not continue until the capacity of the SAP is exhausted. Instead, the SAP will absorb water vapor for a period of time, such as several weeks under stress conditions (described below), and approach a steady state. The steady state of the amount of water vapor absorbed by the SAP is much lower than the total capacity of the SAP. Therefore, the SAP in the absorbent article still has the ability to absorb liquid insults during use. For example, the steady state can be less than about 10% of the total capacity of the absorbent article. However, even at 10%, enough water vapor can be absorbed to activate the wet indicator mark and / or cause the color change of the SAP before wear.

[0100] Numerous factors can affect the moisture absorption of SAP in an absorbent article. For example, although not wishing to be bound by theory, the cellulose in an absorbent article does not absorb water vapor moisture as easily as SAP. In theory, the cellulose material in an absorbent article will not absorb as much water vapor from the environment as SAP. Therefore, in theory, absorbent articles with a high cellulose to SAP ratio by weight may not absorb as much water vapor from the environment as those absorbent articles with a lower cellulose to SAP ratio by weight. Similarly, in theory, absorbent articles with a high weight or gram of SAP per absorbent article may also absorb more water vapor than absorbent articles with a very low weight or gram of SAP.

[0101] In another embodiment, the absorbent article is a catamenial pad, which typically has much less SAP per article than a diaper or training pants. And similarly, catamenial pads typically have much less SAP per article than adult incontinence pads and / or pants. In theory, absorbent articles containing SAP in amounts greater than 5 grams per article, or 8 grams per article, or 10 grams per article would potentially benefit from the packaging of the present invention.

[0102] In addition, in theory, the air permeability of the backsheet of absorbent article can similarly help or influence the amount of water vapor absorbed by SAP when being in the absorbent article packaging.For example, non-breathable film can provide the high barrier to the moisture absorption of SAP, and the goods containing SAP are in the packaging.However, for diapers, pants and adult incontinence pants with breathable film as backsheet component, this type of breathable film is theorized to allow moisture to pass through the space between adjacent absorbent articles in the packaging or to diffuse between.However, it is believed that the absorbent article packaging material of the present invention is to include the absorbent article of the breathable film as the backsheet component that needs particularly.

[0103] As previously stated, there are many absorbent articles that may be packaged within the packaging material of the present invention. Figure 4 and Figure 5 Two specific examples are provided in . However, the packaging material and packaging of the present invention can be used to contain numerous absorbent articles as previously described. Figure 4 and Figure 5 These are merely examples of articles that may be contained with the packaging material / packaging of the present invention.

[0104] exist Figure 4 , an exemplary feminine hygiene pad 400 is shown. The feminine hygiene pad 400 includes a top sheet 420, a back sheet 450, and an absorbent core 440 disposed between the top sheet 420 and the back sheet 450. A fluid management layer 430 may be disposed between the top sheet 420 and the absorbent core 440. The absorbent article has a wearer-facing surface 460 and an opposite garment-facing surface 462. The wearer-facing surface 460 primarily includes the top sheet 420, while the garment-facing surface 462 primarily includes the back sheet 450. Additional components may be included in the wearer-facing surface 460 and / or the garment-facing surface 462. For example, if the absorbent article is an incontinence pad, a pair of barrier cuffs extending generally parallel to the longitudinal axis L of the absorbent article 400 may also form a portion of the wearer-facing surface 460. Similarly, a fastening adhesive may be present on the back sheet 450 and form a portion of the garment-facing surface 462 of the absorbent article.

[0105] Absorbent core 440 may include any suitable shape, including but not limited to oval, circular (discorectangle), rectangular, asymmetric and hourglass. For example, in some forms of the present invention, absorbent core 440 may have a contour shape, such as narrower than the end zone in the middle region. For example, absorbent core may have a tapered shape, with a wider portion at one end zone of the pad, tapering to a narrower end zone at the other end zone of the pad. Absorbent core may have a variable stiffness in MD and CD.

[0106] The configuration and construction of the absorbent core can vary (e.g., the absorbent core 440 can have varying thickness zones, hydrophilic gradients, superabsorbent gradients, or lower average density and lower average basis weight acquisition zones). In addition, the size and absorptive capacity of the absorbent core 440 can also vary to accommodate a variety of wearers. However, the total absorptive capacity of the absorbent core 440 should be consistent with the design load and intended use of the disposable absorbent article or incontinence pad.

[0107] In some forms of the present invention, the absorbent core may include multiple multifunctional layers except the first laminate and the second laminate. For example, the absorbent core may include a core wrap (not shown), which can be used to encapsulate the first laminate and the second laminate and other optional layers. The core wrap can be formed by two nonwoven materials, substrates, laminates, films or other materials. In one form, the core wrap can only include a single material, substrate, laminate or other material wrapped around itself at least partially. The absorbent core may include one or more adhesives, such as to help SAP or other absorbent materials to be fixed in the first laminate and the second laminate.

[0108] Absorbent cores with various core designs containing relatively high levels of SAP are disclosed in U.S. Pat. No. 5,599,335 to Goldman et al., EP 1,447,066 to Busam et al., WO 95 / 11652 to Tanzer et al., U.S. Patent Publication No. 2008 / 0312622A1 to Hundorf et al., and WO 2012 / 052172 to Van Malderen. These can be used to construct superabsorbent layers.

[0109] Another example of an absorbent article that may be included in the package of the present invention is a diaper. Figure 5 Shown is a plan view of an exemplary absorbent article, which is a diaper 1900, in its flat, uncontracted state (i.e., exiting elastic-induced contraction), with its wearer's skin-facing surface facing the viewer and its garment-facing surface facing the viewer, respectively.

[0110] Such diapers are shown for illustrative purposes only, as the package of the present invention may be used with a wide variety of diapers or other absorbent articles.

[0111] The absorbent article may include a liquid permeable topsheet 1924, a liquid impermeable backsheet 1925, an absorbent core 1928 positioned at least partially between the topsheet 1924 and the backsheet 1925, and barrier leg cuffs 1934. Each barrier leg cuff 1934 may include one or more elastic bands or elastic elements 1933 in the chassis of the absorbent article between the topsheet 1924 and the backsheet 1925 in the leg opening area.

[0112] The absorbent article may also include a liquid management system ("LMS"), which in the example shown includes a distribution layer and an acquisition layer, between the topsheet 1924 and the absorbent core 1928. The LMS may also be provided in the form of a single layer or two or more layers. Figure 5 Also shown are typical adhesive diaper components, such as a fastening system including an adhesive insert 1942 or other mechanical fastener attached toward the rear edge of the absorbent article 1900 and cooperating with a landing zone 1944 on the front of the absorbent article 1900. The absorbent article may also include other typical elements not shown, such as, for example, a rear elastic waist feature structure and a front elastic waist feature structure ( Figure 5 shown in 1937).

[0113] The absorbent article 1900 may include a front waist edge 1910, a back waist edge 1912 longitudinally opposite the front waist edge 1910, a first side edge 1903, and a second side edge 1904 laterally opposite the first side edge 1903. The front waist edge 1910 is the edge of the absorbent article 1900 that is intended to be placed toward the front of the user when worn, and the back waist edge 1912 is the opposite edge. When the absorbent article 1900 is put on by the wearer, the front waist edge 1910 and the back waist edge together form a waist opening. The absorbent article 1900 may have a longitudinal axis 1980 that extends from the lateral midpoint of the front waist edge 1910 to the lateral midpoint of the back waist edge 1912 of the absorbent article 1900 and divides the absorbent article 1900 into two halves that are substantially symmetrical with respect to the longitudinal axis 1980, wherein the article is laid flat and as Figure 5 6 as viewed from the wearer-facing surface. The absorbent article may also have a lateral axis 1990 extending from the longitudinal midpoint of the first side edge 1903 to the longitudinal midpoint of the second side edge 1904. The length L of the absorbent article 1900 may be measured along the longitudinal axis 1980 from the front waist edge 1910 to the back waist edge 1912. The crotch width of the absorbent article 1900 may be measured along the lateral axis 1990 from the first side edge 1903 to the second side edge 1904. The absorbent article 1900 may include a front waist region 1905, a back waist region 1906, and a crotch region 1907.

[0114] The topsheet 1924, backsheet 1925, absorbent core 1928 and other article components may be assembled in a variety of configurations, particularly by, for example, gluing or heat embossing.

[0115] The absorbent core 1928 may comprise absorbent material and a core wrap encapsulating the absorbent material, wherein the absorbent material comprises 75% to 100%, at least 80%, at least 85%, at least 90%, at least 95% or at least 99%, all by weight of the absorbent material, specifically reciting all 0.1% increments within the above specified ranges and all ranges formed therein or thereby.

[0116] The absorbent core 1928 may include one or more channels. Additionally or alternatively, the LMS may include one or more channels. In some forms, the channels of the LMS may be positioned within the absorbent article 1900 so that they are aligned, substantially aligned, overlapped, or at least partially overlapped with the channels of the absorbent core 1928. These and other components of the absorbent article will now be discussed in more detail.

[0117] The top sheet 1924 is the portion of the absorbent article that is in direct contact with the wearer's skin. As known to those skilled in the art, the top sheet 1924 may be joined to the back sheet 1925, the core 1928, and / or any other layer. Typically, the top sheet 1924 and the back sheet 1925 are directly joined to each other at some locations (e.g., at or near the periphery of the article), and are indirectly joined together at other locations by making them directly join one or more other elements of the absorbent article 1900.

[0118] The backsheet 1925 is typically the portion of the absorbent article 1900 that is positioned adjacent the garment-facing surface of the absorbent core 1928 and that prevents or at least inhibits the body exudates absorbed and contained therein from soiling articles such as bed sheets and underwear. The backsheet 1925 is typically impermeable to liquids (e.g., urine, thin BM), or at least substantially impermeable, but permeable to vapor to allow the diaper to "breathe". In a specific example, the backsheet may include a film and a nonwoven, wherein the nonwoven ( Figure 5 1971) forms part of the garment-facing surface of the article.

[0119] As used herein, the term "absorbent core" refers to a separate component of an absorbent article having a maximum absorption capacity and comprising absorbent material. The absorbent core may include a core wrap or a core bag (hereinafter "core wrap") that encapsulates the absorbent material. The term "absorbent core" does not include LMS or any other component of the absorbent article that is neither an integral part of the core wrap nor placed in the core wrap. The absorbent core 1928 of the present invention may include a large amount of superabsorbent polymers (abbreviated herein as "SAP") encapsulated in the core wrap. The SAP content may represent 70% to 100% or at least 70%, 75%, 80%, 85%, 90%, 95%, 99% or 100% by weight of the absorbent material contained in the core wrap.

[0120] "Absorbent material" refers to materials having some absorbent or liquid retaining properties, such as SAP, cellulose fibers, and synthetic fibers.

[0121] In one form, the absorbent article may include front ears 1946 and back ears 1940. The ears may be an integral part of the chassis, such as formed from the top sheet 1924 and / or the back sheet 1925 in the form of side panels. The back ears 1940 may be stretchable to facilitate attachment of the tabs 1942 (fasteners 1943) to the landing zone 1944 and to maintain the taped diaper in place around the waist of the wearer. The back ears 1940 may also be elastic or extensible to provide a more comfortable and conformable fit to the wearer by initially conforming to the absorbent article and maintaining the fit throughout the wear period when the absorbent article is loaded with exudates because the elasticized ears allow the sides of the absorbent article to expand and contract.

[0122] In some embodiments, the article is an absorbent article such as a diaper and / or training pants having a moisture sensitive indicator or wetness indicator 800, see Figure 5 . These wetness indicators can be triggered in the packaging of the article before use depending on the environmental conditions to which the packaging of the article is exposed. An unactivated wetness indicator is one in which the wetness indicator is substantially usable to receive and indicate the level of liquid within the article. For example, in the case of a wetness indicator that changes color or appears, a substantially unactivated wetness indicator is one in which 70% or more, or 85% or more, or 95% or more of the area of ​​the wetness indicator (i) is the original (dry) color or (ii) has not yet appeared, specifically enumerating all values ​​within these ranges and any ranges resulting therefrom. As another example, with respect to a vanishable graphic, a substantially unactivated wetness indicator is one in which there is about 70% or more, or 85% or more, or 95% or more of the vanishable graphic.

[0123] The wetness indicator of the present invention can be according to any wetness indicator system known in the art. It is known that wetness indicator can provide a signal of appearance, a signal of disappearance or a signal of color change and can certainly provide a combination thereof. The signal of appearance will usually be invisible or more usually imperceptible in the dry product, and become visible or otherwise perceptible when the product is wet. The signal of appearance can be provided, for example, by a composition of a transparent or color matching the color of the backing material, which color is usually white in its dry state and then changes to a different color when in contact with urine. Other wetness indicators that appear can also be elements that can provide a physical sense of the fullness level of the indicating absorbent assembly. Examples of such elements are disclosed in WO2008132630 and include temperature change elements (cooling or heating elements), pressure inducing elements or foam generating elements.

[0124] The wetness indicator composition can be applied to any layer of the absorbent article using conventional techniques such as printing, spraying or coating during the preparation of the absorbent article. The layer can advantageously be the inner surface of the backsheet or the outer surface of the bottom side of the core wrap. This allows the wetness indicator to be seen from the outside of the article through the transparency of the backsheet while keeping the wetness indicator composition inside the article. The wetness indicator can be particularly easy to be applied to the layer of such nonwoven fabric or film by a slot coating method, especially when the composition can be applied as a hot melt. The slot coating method allows the application of a well-defined slot or a series of slots extending in the longitudinal direction of the converting line, which is generally parallel to the longitudinal direction of the article.

[0125] Test Method

[0126] 1. Thickness test

[0127] The thickness of the single-layer test specimens (caliper / caliper) is measured by a micrometer under static load according to the pharmacopoeial method ISO 534, with modifications mentioned herein. All measurements are carried out in a laboratory maintained at 23°C ± 2°C and 50% ± 2% relative humidity, and the test specimens are conditioned in this environment for at least 2 hours before testing.

[0128] Thickness is measured with a micrometer equipped with a pressure foot capable of applying a steady pressure of 70 kPa ± 0.05 kPa to the test specimen. The micrometer is a static heavy instrument that reads to the nearest 0.1 micron. A suitable instrument is a TMI Digital Micrometer Model 49-56, available from Testing Machines Inc., New Castle, DE, or equivalent. The pressure foot is a flat circular movable surface that is smaller in diameter than the specimen and capable of applying the required pressure. A suitable pressure foot has a diameter of 16.0 mm. The test specimen is supported by a horizontal, flat reference platform that is larger than and parallel to the surface of the pressure foot. The system is calibrated and operated according to the manufacturer's instructions.

[0129] The measurements are carried out on single layer test samples taken from raw material rolls or sheets or on test samples obtained from finished packaging. When cutting test samples from finished packaging, care is taken not to cause any contamination or deformation to the sample during the process. The cut sample should be free of residual adhesive and taken from an area of ​​the package that does not contain any seams or folds. The test sample is ideally 200mm 2 And must be larger than the pressure foot.

[0130] To measure thickness, first zero the micrometer relative to a horizontal flat reference platform. Place the test sample on the platform with the test position centered under the pressure foot. Gently lower the pressure foot at a descent rate of 3.0 mm per second until full pressure is applied to the test sample. Wait 5 seconds and then record the thickness of the test sample to the nearest 0.1 micron. Repeat in a similar manner for a total of ten replicate test samples. Calculate the arithmetic mean of all thickness measurements and report the value as "Thickness" to the nearest 0.1 micron.

[0131] 2.MD tensile strength test

[0132] The MD tensile strength of a material is related to the processability of the packaging material in the packaging preparation process and / or packaging process.

[0133] The MD tensile strength of the film material was measured according to ISO 527 under the following test conditions: the test speed was 500 mm / min, and the clamp distance was 50 mm.

[0134] The MD tensile strength of the paper material was measured according to ISO 1924-2 under the following test conditions: the test speed was 20 mm / min, and the clamp distance was 180 mm.

[0135] When testing the MD tensile strength of a material in a package, the tensile strength in the direction from the top panel to the bottom panel of the primary package is considered the MD tensile strength of the material.

[0136] 3. Basis weight test

[0137] The basis weight of the test sample is the mass (in grams) per unit area (in square meters) of a single material layer and is measured according to the pharmacopoeial method ISO 536. The mass of the test sample is cut into known areas and the mass of the test sample is determined using an analytical balance accurate to 0.0001 grams. All measurements are made in a laboratory maintained at 23°C ± 2°C and 50% ± 2% relative humidity, and the test samples are conditioned in this environment for at least 2 hours prior to testing.

[0138] The measurements are carried out on test samples taken from raw material rolls or sheets or from finished packaging. When cutting test samples from finished packaging, care is taken not to cause any contamination or deformation of the sample during the process. The cut sample should be free of residual adhesive and taken from an area of ​​the package that does not contain any seams or folds. The test sample must be as large as possible in order to take into account any inherent material variability.

[0139] Use a calibrated steel metal ruler from NIST or equivalent to measure the dimensions of the single-layer test sample. Calculate the area of ​​the test sample and record it to the nearest 0.0001 square meter. Use an analytical balance to obtain the mass of the test sample and record it to the nearest 0.0001 gram. Calculate the basis weight by dividing the mass (in grams) by the area (in square meters) and record it to the nearest 0.01 grams per square meter (gsm). Repeat in a similar manner for a total of ten replicate test samples. Calculate the arithmetic mean of the basis weight and report it to the nearest 0.01 grams per square meter.

[0140] 4. Water vapor transmission rate test

[0141] The water vapor transmission rate ("WVTR") test measures the barrier properties of packaging materials and is conducted according to ASTM E96 under the following test conditions: temperature 40°C (±1°C) and relative humidity 75% (±2%). The WVTR test for air column packaging is conducted with two overlapping film layers constituting the air column packaging.

[0142] 5. Thickness test

[0143] The thickness of the film material is measured according to ISO 4593.

[0144] 6. Compression resistance test

[0145] The compression resistance of the secondary package indicates the stacking ability on the pallet.The test is carried out according to ISO12048.

[0146] 7. Puncture resistance test

[0147] Puncture resistance measures the ability of a package to resist physical damage during storage and transportation. The test is performed according to ISO 3036.

[0148] 8. Moisture absorption test

[0149] A primary package containing at least one article is obtained.

[0150] Weigh the primary package to the nearest 0.1 g using a digital balance and record the weight. Obtain secondary packaging. Place at least one primary package into a secondary package and seal the secondary package properly. Corrugated boxes and film-coated corrugated boxes are sealed by gluing. The film packaging is heat sealed so as to have no open gaps. The sealed secondary packages are placed in a constant temperature / humidity space ("CTCH") regulated at 50°C and 80% relative humidity. Retrieve each secondary package from the CTCH space after 72 hours. Open the secondary package and take out the primary package. Weigh the primary package to the nearest 0.1 g using a digital balance and record the weight. Calculate the percentage weight gain of the primary package compared to the initial weight of the primary package and record the weight gain to the nearest 0.1%.

[0151] Example I: Packaging Characteristics

[0152] Several properties of primary packaging materials were measured according to the test methods under Test Methods herein and are indicated in Table 1 below.

[0153] Table 1

[0154]

[0155] PE film*: Polyethylene film from Innova (Lianbin) Co. Ltd.

[0156] PVA film*: Polyvinyl alcohol film from Polye Material Co. Ltd., 2140C

[0157] Paper*: Kraft paper from Pack Cooperation

[0158] Several secondary packagings were prepared. The external dimensions of all secondary packagings tested were 290 mm (length)*190 mm (width)*271 mm (height). The properties of several secondary packagings and secondary packaging materials were measured according to the methods under the test methods herein and are indicated in Table 2 below.

[0159] Table 2

[0160]

[0161] Inflatable membrane*: Shanghai Air-Paq Composite Material Co., Ltd., China

[0162] Corrugated paper box*: Tianjin Shikaiwei, China

[0163] Film-coated corrugated boxes*: PET film-coated boxes from Tianjin Shikaiwei, Tianjin, China

[0164] Sample 2-1 provides low WVTR as well as high compression resistance and high puncture resistance, which is desirable for secondary packaging despite the low package weight.

[0165] Sample 2-2 and Sample 2-3 have high basis weight and packaging weight. Both samples have high WVTR values ​​because the packaging material constructed has open pores that allow moisture to transfer freely. Sample 2-2 and Sample 2-3 both exhibit low puncture resistance.

[0166] Example II. Packaging System

[0167] Various packaging systems shown in Table 3 below were prepared.

[0168] Primary packages made from the various primary packaging materials tested in Example 1 were prepared in such a way that each primary package contained 19 baby diapers and were heat sealed.

[0169] The secondary packages tested in Example 1, Sample 2-1, Sample 2-2 and Sample 2-3 were used for testing. Each secondary package contained two or more prepared primary packages. After placing two primary packages in each secondary package, the secondary packages were sealed. Sample 2-1 was heat sealed, and Sample 2-2 and Sample 2-3 were glue sealed in a conventional manner.

[0170] The Moisture Uptake Values ​​of the primary packages containing diapers in various packaging systems were measured according to the Moisture Uptake Value Test disclosed herein and are indicated in Table 3 below.

[0171] Table 3

[0172]

[0173] Example 1 using a primary package made of PE film and Examples 5 and 6 using sealed air column boxes have significantly low moisture absorption values.

[0174] The dimensions and values ​​disclosed herein are not to be understood as being strictly limited to the exact numerical values ​​cited. Instead, unless otherwise indicated, each such dimension is intended to represent the stated value and a functionally equivalent range around that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm".

[0175] Unless expressly excluded or otherwise limited, each document cited herein, including any cross-referenced or related patent or patent application and any patent application or patent to which this application claims priority or the benefit of, is hereby incorporated by reference in its entirety. The citation of any document is not an admission that it is prior art to any of the present invention disclosed or claimed herein, or an admission that it, by itself or in combination with any one or more of the references, proposes, suggests, or discloses any such invention. In addition, to the extent that any meaning or definition of a term in this invention 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 invention shall govern.

[0176] Although specific embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various other changes and modifications may be made without departing from the spirit and scope of the present invention. Therefore, it is intended that all such changes and modifications within the scope of the present invention be covered in the appended claims.

Claims

1. A packaging system, comprising: at least one primary package containing at least one article, and a secondary package, said secondary package containing said primary package, The secondary packaging comprises a second packaging material having a water vapor transmission rate of less than 100 g / m 2 / day water vapor transmission rate, and compression resistance higher than 150N, wherein the secondary packaging comprises an inflatable material, the inflatable material comprises a plurality of inflatable columns, Wherein the secondary packaging material has a basis weight of 80 gsm to 220 gsm.

2. The system of claim 1, wherein the primary packaging comprises a primary packaging material having a water vapor transmission rate greater than 200 g / m 2 Water vapor transmission rate per day.

3. The system of claim 1 or 2, wherein the primary packaging comprises a biodegradable material, a recyclable material, or a combination thereof.

4. The system of claim 3, wherein the biodegradable material comprises a material selected from the group consisting of aliphatic aromatic polyesters, thermoplastic starch, polybutylene succinate, polybutylene succinate copolymers, polycaprolactone, polyhydroxyalkanoate, polyhydroxyalkanoate copolymers, polylactic acid, polylactic acid copolymers, polyvinyl alcohol, polyvinyl alcohol copolymers, polyglycolic acid, polypropylene carbonate, natural fibers, and combinations thereof.

5. The system of claim 1 or 2, wherein the primary package comprises a top panel and a bottom panel.

6. The system of claim 5, wherein the primary package has an MD tensile strength of not less than 0.55 N / mm as measured according to the Tensile Strength Test.

7. The system of claim 1 or 2, wherein the secondary packaging has a puncture resistance greater than 7 Joules as measured according to a puncture resistance test.

8. The system of claim 1 or 2, wherein the article is an absorbent article.

9. The system of claim 1, wherein the primary package comprising at least one article exhibits a moisture absorption of less than 2% as measured according to a Moisture Absorption Test.

10. The system of claim 1, wherein the secondary packaging comprises a plastic film. The system according to claim 10 , wherein the plastic film has a thickness of not less than 40 μm.

12. The system of claim 1 or 2, wherein the secondary package is in the shape of a cuboid.

13. The system of claim 1, wherein the secondary package comprises a plurality of inflatable columns in a vertical orientation when the secondary package is in a standing position.

14. The system of claim 1 or 2, wherein the primary package comprises natural fibers and has a basis weight of 50 gms to 120 gsm.

15. The system of claim 1 or 2, wherein the at least one article comprises a substantially inactivated wetness indicator.

16. The system of claim 1 or 2, wherein the primary packaging comprises a recyclable material and the secondary packaging comprises a recyclable material.

17. The system of claim 1 or 2, wherein the primary packaging comprises a biodegradable material and the secondary packaging comprises a recyclable material.

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