EP3122654A2 - Système d'emballage et procédé permettant d'inhiber l'entrée d'humidité - Google Patents

Système d'emballage et procédé permettant d'inhiber l'entrée d'humidité

Info

Publication number
EP3122654A2
EP3122654A2 EP15767875.6A EP15767875A EP3122654A2 EP 3122654 A2 EP3122654 A2 EP 3122654A2 EP 15767875 A EP15767875 A EP 15767875A EP 3122654 A2 EP3122654 A2 EP 3122654A2
Authority
EP
European Patent Office
Prior art keywords
package system
bag
outer bag
interior
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15767875.6A
Other languages
German (de)
English (en)
Other versions
EP3122654B1 (fr
EP3122654A4 (fr
Inventor
James Farina
Evon A. Bolessa
Nandu Deorkar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOLESSA, EVON, A.
Deorkar Nandu
Farina James
Avantor Performance Materials LLC
Original Assignee
Bolessa Evon A
Deorkar Nandu
Farina James
Avantor Performance Materials LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bolessa Evon A, Deorkar Nandu, Farina James, Avantor Performance Materials LLC filed Critical Bolessa Evon A
Publication of EP3122654A2 publication Critical patent/EP3122654A2/fr
Publication of EP3122654A4 publication Critical patent/EP3122654A4/fr
Application granted granted Critical
Publication of EP3122654B1 publication Critical patent/EP3122654B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/12—Bags or like containers made of paper and having structural provision for thickness of contents with two or more compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/38—Articles or materials enclosed in two or more wrappers disposed one inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/522—Inspection openings or windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/54—Cards, coupons, or other inserts or accessories
    • B65D75/56—Handles or other suspension means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
    • B65D81/268—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being enclosed in a small pack, e.g. bag, included in the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means

Definitions

  • the location of the desiccant should be selected so that it cannot migrate or break-up and contaminate the product.
  • the package system should also be designed to provide direct dispensing of the product into a reactor/mixing vessel through a port and permit spectroscopic (Raman spectroscopy) analysis of the product without opening the inner bag and risking product contamination. Additionally, the package system should prevent outside moisture from passing water through the walls of the package into the inside of the package.
  • the inner bag is formed from a layer of a gas and/or moisture permeable material and has a first end, a second end and opposing side edges. The side edges are sealingly attached to the side wall on the interior of the outer bag from the second end of the outer bag. The first end of the inner bag is attached to the interior of the outer bag at a point intermediate the first and second ends of the outer bag or to the exterior wall of the discharge port to form a second compartment.
  • the second end of the inner bag is sealed closed.
  • the bottom end of the inner bag that contains the desiccant material can be heat sealed or fused along a line that extends horizontally and parallel to the second end of the inner bag.
  • the heat seal is located at least 4 inches above the bottom port, preferably a minimum of 5 inches from the bottom port and most preferably 6 or more inches. The function of this seal is to keep the inner bag containing the desiccant away from the discharge port so that it does not impede the flow of material during emptying operations.
  • the second ends of the inner and outer bags are sealed closed to isolate the intermediate space from the environment exterior to the package system.
  • the HDPE liner does not include slip agents or block agents; however, an antistatic agent can be added to the HDPE liner to ensure that all of the product is delivered and prevents sticking of the product to the walls due to static buildup.
  • the first end of the inner bag is sealingly attached to the exterior wall of the discharge port and the first end of the outer bag sealingly surrounds the first end of the inner bag and is sealingly attached around the exterior wall of the discharge port to form an intermediate space (also referred to herein as a compartment or the second compartment) between the inner bag and the outer bag.
  • the discharge port is used to fill and discharge materials contained in the interior of the inner bag.
  • the first end of the HDPE outer bag forms a seal around the exterior wall of the discharge port.
  • the discharge port is located at the bottom of the packaging system in the HDPE outer bag.
  • the discharge port can have a removable cap for closing and sealing the discharge port.
  • the removable cap isolates the contents of the package system from the outside environment during transportation and storage.
  • the package system can also include a handle attached to the second end of the package system to facilitate the handling of the package system by the user.
  • the pressure equalizing port is located near the second end of the package system and has a passage that extends between the interior of the inner bag and the environment exterior to the package system.
  • the passage of the pressure equalizing port contains one or more filter materials that contain at least one desiccant and/or gas scavenging materials, which can selectively prevent moisture or certain gases from entering the interior of the inner bag.
  • the pressure equalizing port can also facilitate the introduction of dry inert gas to blanket the material in the inner bag.
  • the package system has a first end and a second end and comprises, consists of or consists essentially of: a first plastic layer, a second plastic layer, a layer of permeable material disposed between the first and second plastic layers, a discharge port, a pressure equalizing port and at least one desiccant or gas scavenging material.
  • the first and second plastic layers are preferably made of substantially gas impermeable plastic, most preferably from HDPE and/or LLDPE, and at least one of the layers is transparent.
  • the permeable inner layer is preferably made of an ethylene/vinyl alcohol copolymer or polychlorotrifluoroethene.
  • the three layers have substantially the same dimensions and the outer edges are aligned and sealed by a well-known method (e.g., heat stamping or ultrasonic welding) to form a bag with first and second compartments separated by the gas permeable layer.
  • a well-known method e.g., heat stamping or ultrasonic welding
  • the first end of the package system is attached to the handle and the pressure equalizing port is located in the first plastic layer near the first end.
  • the discharge port is located in the first plastic layer near the second end.
  • the first compartment is disposed between the first plastic layer and the permeable layer and contains the contents, such as salts used in the manufacture of biopharmaceuticals.
  • the desiccant and/or gas scavenging agent(s) are placed in the second compartment between the second plastic layer and the gas permeable layer.
  • FIG. 3 is a side view of the embodiment of the package system in FIG. 1 showing the inner and outer.
  • FIG. 5 is a perspective view of the pressure equalizing port and filter system of the package system shown in FIG 1.
  • FIG. 6 is a perspective view of the cap and locking ring for the pressure equalizing port shown in FIG 5.
  • FIG. 8 is a side view of the embodiment of the package system in FIG. 1 showing the handle.
  • FIG. 9 is a side view of a second embodiment of the package system having two compartments separated by a gas permeable layer attached to the discharge port.
  • FIG. 10 is a front view of the package system shown in FIG. 9 with the handle removed to show the relationship of the three layers that form the package system.
  • FIG. 11 is a front view of the package system shown in FIG. 9 enclosed in an over bag.
  • FIG. 12 is a photograph of the package system after testing in a stability chamber.
  • FIG. 13 is a photograph of a prior art package system after testing in a stability chamber.
  • the present invention is a package system that reduces the caking of products contained in the package system, preferably salts, due to moisture.
  • the package utilizes a moisture barrier film that prevents the migration of outside moisture through the walls of the package and into the inside of the package. Caking is prevented by removing excess water covering all particles even when they are packed in a bulk package.
  • the package system removes excess moisture in the crystals.
  • the package system includes a gas, vapor, and/or moisture permeable inner bag that contains the product and a moisture and/or gas impermeable outer bag that encloses the inner bag and creates an intermediate space between the inner bag and the outer bag.
  • the key to preventing caking of the product due to moisture is keeping the inner bag at the correct moisture and gas level and capturing any free moisture or gas that may be released by the product (e.g., salts) as a result of temperature changes in the environment.
  • Moisture is uniformly removed from the product by forming the inner bag using a gas permeable material that transmits moisture (i.e., water vapor) through the wall of the bag to the intermediate space.
  • the intermediate space contains materials that absorbs moisture, oxygen and/or selected gasses (e.g., HC1).
  • the space can also be filled with an inert gas.
  • the term "outer bag” refers to the enclosed structure formed by the impermeable, exterior walls of the package system. The term is used interchangeably with the term "first compartment.”
  • the term “inner bag” refers to the enclosed structure inside the outer bag of the package system that has at least one wall formed by a permeable material and receives the desiccant.
  • the term is used interchangeably with the term "second
  • the term "layer” refers to one or more layers of polymeric material that are formed into a single layer structure.
  • the layers can be formed from the same polymer or different polymers.
  • the layer or layers can be formed from a polymer or from a woven cloth or synthetic material.
  • the term "impermeable” refers to a material through which substances, such as liquids or gases, cannot pass or can only pass in very small amounts.
  • the term “permeable” refers to a material through which substances, such as liquids or gases, can pass freely but substantially prevents the passage of solid materials.
  • the term "desiccant” refers to a hygroscopic substance that induces or sustains a state of dryness (desiccation) in its vicinity.
  • the desiccants are preferably prepackaged solids that adsorb water.
  • the desiccant material is clay, molecular sieves, or silica.
  • the term “unit” refers to a quantity of desiccant, which will absorb a set percentage of its weight at certain levels of humidity. For this disclosure, one "unit" is approximately equal to one ounce.
  • fused refers to a method of sealing two or more layers of polymeric materials together by applying heat at a temperature above the highest melting point of the two or more polymeric materials. Ultrasonic welding is one method of fusion. When the two or more layers of polymeric materials cool, they are sealed together in the areas where the heat was applied.
  • the package system must also protect the product and maintain the integrity of the product, e.g., keeping the product sterile, dry, and clump free. Additionally, some materials are sensitive to oxygen and need to be maintained in an inert oxygen free environment.
  • Another feature of the package system is that the product can be dispensed directly into the reactor system without contacting the outside environment and affecting the integrity of the product. This is preferably accomplished using a discharge port on one end of the package system, preferably about 4-inches in diameter, and a pressure equalizing port located at the other end of the package system. The pressure equalizing port allows filtered air or an inert gas to enter the package system as the product is removed to prevent a vacuum from forming and to ensure continuous flow of the product.
  • the package system has an inner bag surrounded by an outer bag.
  • the inner bag has a first end that is connected to a discharge port and an inner wall formed from a gas permeable material that extends from the discharge port to a sealed second end.
  • the first end of the outer bag is joined to the first end of the inner bag around the discharge port and a surrounding outer wall extends co-extensively with the inner wall to form an intermediate space around the inner bag.
  • a desiccant or other moisture absorbing material gas or oxygen absorbing materials may also be added
  • the second end of the package system i.e., the second ends of the inner and outer bags
  • a pressure equalizing port can be located near the second end of the package system to provide a passage between the interior of the inner bag and the outside environment.
  • the pressure equalizing port can be connected to an inert gas source, such as nitrogen, at a low pressure to maintain an "inert gas blanket" between the contents of the inner bag and the outside environment.
  • the pressure equalizing port can be connected to a filter system that allows the interior of the inner bag to "breathe" the air from the outside environment.
  • the filter system can be formed by a cylindrical tube and can contain one or more filters that filter out moisture, oxygen and/or other gasses that could potentially contaminate the product in the package system.
  • the filter material includes at least one desiccant or gas scavenging material.
  • the end of the filter opposite the pressure equalizing port can be sealed with a locking cap, which is used when the package system is being shipped or stored.
  • a locking cap which is used when the package system is being shipped or stored.
  • the cap on the filter system is removed so that outside air can enter the filter system and pass through the pressure equalizing port to facilitate the delivery of the package system contents.
  • the package system includes an inner bag formed from a moisture permeable, porous material layer, such as a cloth or Tyvek®, and an outer bag formed from a non-porous layer, e.g., any one of several different polyethylenes.
  • the porous material layer allows water vapor to pass in order to prevent moisture build-up in the inner bag that contains the product.
  • the cloth is typically produced by weaving or knitting textile fibers, such as wool, cotton or a similar fiber or threads made from polymeric materials.
  • Tyvek® is the preferred material for the porous layer and it is manufactured by E. I. Du Pont De Nemours and Company, Wilmington Delaware.
  • Tyvek® is formed using continuous and very fine fibers of high- density polyethylene, preferably 100 percent high-density polyethylene, that are randomly distributed and non-directional. These fibers are first flash spun, then laid as a web on a moving bed before being bonded together by heat and pressure - without the use of binders, sizers or fillers. By varying both the lay-down speed and the bonding conditions, the flashspun layer can be engineered to form either soft-structure or hard-structure Tyvek®.
  • a portion of the inner bag wall can be transparent so that the contents of the inner bag can be viewed through the wall of the transparent or semi-transparent outer bag.
  • the transparent portion of the inner bag wall does not have to be gas permeable and can be formed by a panel or by a window. Such windows or panels are commonly used in the packaging industry so that the contents can be viewed and one of ordinary skill in the art would be familiar with the methods used to form such transparent portions.
  • the package system has an outer bag with an outer bag structure, also referred to herein as the exterior film structure.
  • the present invention relates to exterior films structures made of copolymers of polyethylene; although polypropylene films can also be used.
  • polyethylene film or "polyethylene layer” are intended to include any one of the types of polyethylene that are disclosed below, as well as multi-layer films that contain two or more types of polyethylene, e.g., a layer of high density polyethylene and a layer of low density polyethylene.
  • Polyethylene is the name for a polymer whose basic structure is characterized by the chain— CH 2 CH 2 ) n .
  • Polyethylene homopolymer is generally described as being a solid, which has a partially amorphous phase and partially crystalline phase with a density of between 0.915 to 0.970 g/cm .
  • the relative crystallinity of polyethylene is known to affect its physical properties.
  • the amorphous phase imparts flexibility and high impact strength while the crystalline phase imparts a high softening temperature and rigidity.
  • Unsubstituted polyethylene is generally referred to as high density homopolymer and has a crystallinity of 70 to 90 percent with a density between about 0.96 to 0.97 g/cm .
  • polyethylenes are not unsubstituted homopolymer but instead have C 2 -Cg alkyl groups attached to the basic chain. These substituted polyethylenes are also known as branched chain polyethylenes. Also, commercially available polyethylenes frequently include other substituent groups produced by copolymerization. Branching with alkyl groups generally reduces crystallinity, density and melting point. The density of
  • polyethylene is recognized as being closely connected to the crystallinity.
  • the physical properties of commercially available polyethylenes are also affected by average molecular weight and molecular weight distribution, branching length and type of substituents.
  • Polyethylene Placement of a particular polymer into one of these categories of “polyethylene” is frequently based upon the density of the "polyethylene” and often by additional reference to the process by which it was made since the process often determines the degree of branching, crystallinity and density.
  • the nomenclature used is nonspecific to a compound but refers instead to a range of compositions. This range often includes both homopolymers and copolymers.
  • HDPE high density polyethylene
  • ethylene is ordinarily used in the art to refer to both (a) homopolymers of densities between about 0.960 to 0.970 g/cm and (b) copolymers of ethylene and an alpha-olefin (usually 1-butene or 1-hexene), which have densities between 0.940 and 0.958 g/cm .
  • HDPE includes polymers made with Ziegler or Phillips type catalysts and is also said to include high molecular weight "polyethylenes.” In contrast to HDPE, whose polymer chain has some branching, are "ultra high molecular weight polyethylenes" which are essentially unbranched specialty polymers having a much higher molecular weight than the high molecular weight HDPE.
  • polyethylene will be used (unless indicated otherwise) to refer to ethylene homopolymers as well as copolymers of ethylene with alpha-olefins and the term will be used without regard to the presence or absence of substituent branch groups.
  • LDPE high pressure, low density polyethylene
  • Imperial Chemical Industries, Ltd. researchers The polyethylene industry began in the 1930s as a result of the discovery of a commercial process for producing LDPE by Imperial Chemical Industries, Ltd. researchers.
  • LDPE is used to denominate branched homopolymers having densities between 0.915 and 0.930 g/cm as well as copolymers containing polar groups resulting from copolymerization, e.g. with vinyl acetate or ethyl acrylate.
  • LDPEs typically contain long branches off the main chain (often termed "backbone") with alkyl substituents of 2 to 8 carbon atoms.
  • LLDPE Linear Low Density Polyethylene
  • VLDPE Very Low Density Polyethylene
  • ULDPE Ultra Low Density Polyethylene
  • This grouping like LLDPEs comprise only copolymers of ethylene with alpha- olefins, usually 1-butene, 1-hexene or 1-octene and are recognized by those skilled in the art as having a high degree of linearity of structure with short branching rather than the long side branches characteristic of LDPE.
  • VLDPEs have lower densities than LLDPEs.
  • the densities of VLDPEs are recognized by those skilled in the art to range between 0.860 and 0.915 g/cm 3 .
  • selection of films for packaging pharmaceutical products includes consideration of one or more criteria such as puncture resistance, cost, sealability, stiffness, strength, printability, durability, barrier properties, machinability, optical properties such as haze and gloss, flex-crack resistance and government approval for contact with pharmaceutical products.
  • the type of polyethylene selected for use in the present invention and the thickness of the film (or layer for a multi-layer film) will depend on these considerations, as well as the size of the inner and outer bags and the estimated weight of the product.
  • the outer bag is made from a plastic film that can be transparent or semi-transparent and can have one or more layers formed by well-known extrusion, co-extrusion and/or lamination processes.
  • at least one of the film layers is a structural layer and includes polyethylene, most preferably high or low density polyethylene.
  • the structural layer(s) are intended to provide strength and impact resistance, to support the articles in the inner bag and to prevent the outer bag from rupturing.
  • the film includes multiple layers, it can have a gas barrier layer that prevents oxygen from passing through the film.
  • the preferred construction for a multiple layer film includes a gas barrier layer disposed between two structural layers of polyethylene.
  • the gas barrier layer can be made from ethylene/vinyl alcohol copolymer (EVOH) and polychlorotrifluoroethene (PCTFE or PTFCE). Other materials used in gas barrier layers of films for the food industry can also be used and are well known to one skilled in the art.
  • the multi-layer films can also have one or more ethylene polymer-based adhesive layers disposed between the gas barrier layer and the outer structural layers.
  • the outer bag structure can have an outer heat seal layer that includes an ethylene copolymer, such as ethylene vinyl acetate copolymer, for bonding the opposite sides of the outer bag together and for bonding the inner bag to the outer bag.
  • the inner and outer bags are bonded together along the edges on at least three sides by a fusion bond.
  • the fusion bond can be formed by ultrasonic welding of the layers to another at their registered edges, using a Branson ultrasonic welder (Branson Products, Inc., Danbury, Conn.) or other suitable ultrasonic welding tool.
  • the bonded layers of the inner bag and the outer bag are joined at their edges on three sides to define an enclosed interior volume inside the inner bag for containment of a product article therein, e.g., a
  • the intermediate space can contain a desiccant for the absorption of moisture or other materials for absorbing oxygen, carbon dioxide or other gases that may be discharged by the product contained in the inner bag.
  • a desiccant or oxygen scavenging agent such as sodium sulfite (Na 2 S0 3 )
  • Na 2 S0 3 sodium sulfite
  • FIG. 1 shows the package system 10 that includes: an inner bag 12, an outer bag 14 with a compartment or intermediate space 13 therebetween, a discharge port 16 with cap 18 and locking ring 20 and a handle 22.
  • a desiccant 24 is disposed in the intermediate space 13 between the inner and outer bags 12, 14. Also shown is a pressure equalizing port 26 connected to a filter system 28 with a cap 30 and locking ring 32.
  • FIG. 2 shows a side view of the package system 10 in which the bottom of the inner bag 12 is attached to the interior surface of the outer bag 14 intermediate the first and second ends of the outer bag 14.
  • the point where the bottom of the inner bag 12 attaches to the interior surface of the outer bag 14 is at least 4 inches from the discharge port 16, more preferably 5 inches and most preferably 6 or more inches.
  • FIG. 3 shows the inner bag 12 with the bottom end attached to the interior of the outer bag 14 and the other end open.
  • In between the inner and outer bags 12, 14 is the intermediate space 13 that receives the desiccant 24 (FIG. 1) and any gas scavenging materials.
  • FIG. 4 is similar to FIG.
  • the inner bag 12 formed by a section 12a of gas permeable material, a panel 12b and a window 12c.
  • the gas permeable material that forms the inner bag 12 is non-transparent and prevents the contents from being viewed through the transparent outer bag 14.
  • the panel 12b and the window 12c are transparent and can be formed from materials that are not gas permeable. The methods for forming transparent openings in otherwise non-transparent plastic bags are well known to those skilled in the art.
  • FIG. 5 shows the pressure equalizing port 26 and filter system 28.
  • the filter system 28 can include one or more desiccants and or gas scavenging filter materials 34, 36, 38 that filter moisture and undesired gases to prevent them from entering the interior of the inner bag 12.
  • the cap 30 and locking ring 32 as shown in FIGs. 6 and 7 are secured to the filter system 28 when the package system 10 is transported or stored.
  • FIG. 8 shows the handle that is attached to the package system 10 opposite the discharge port 16 (FIG. 1). [064] FIGs.
  • FIGS. 9 and 10 show a second embodiment of the package system 110 that includes: a first outer plastic layer 112 and a second outer plastic layer 114 disposed on either side of a gas and moisture permeable layer 115 to form a first compartment 111 and a second compartment 115.
  • a handle 122 is attached to the first end and a discharge port 116 is located near the second end.
  • One or more desiccant packets 124 are disposed in the second compartment 113 between the gas permeable layer 115 and the second plastic layer 114.
  • a pressure equalizing port 126 connected to a filter system 128.
  • the gas permeable layer 115 separates the desiccant 124 from the product 125 in the package system 110 but allows moisture and gasses to pass through.
  • FIG. 11 shows an embodiment similar to the second embodiment shown in FIGs. 9 and 10 wherein the bag system 110 includes an over bag 150.
  • the outer bag 112 is placed inside the over bag 150 for additional protection from gas and/or moisture contaminating the contents of the outer bag 112 and for physical protection from damage that may occur during transportation.
  • the over bag 150 can be made from Mylar® or a polymer material such as LDPE or HDPE.
  • a seal 152 at the top of the over bag 150 isolates the contents from the exterior environment.
  • a model test bag was produced by heat sealing a multi-layer bag, which included an interior layer made of Tyvek® that provides a vapor transmission wall disposed between two outer layers made of substantially gas and moisture impermeable HDPE.
  • the top edges of the three layers were aligned in registration and the interior Tyvek® layer extended to a point intermediate the first and second ends of the two outer layers.
  • the bottom and two side perimetrical edges of the outer layers of HDPE were sealed together to form a first compartment and the perimetrical edges on the bottom and two sides of the Tyvek ® layer were sealed to the first outer HDPE layer to form a second compartment.
  • test salt was placed in the first compartment from the top end of the bag on one side of the Tyvek® layer and the desiccant material was placed on the other side (five 1/6 clay type desiccants from Desicare) of the Tyvek® layer in the second compartment.
  • the perimetrical edges of the three layers on top side of the bag were sealed to close the system and isolate the product on one side of the Tyvek® wall from the desiccant on the other side so that the test salt was in contact with the vapor transmission wall.
  • Model salts such as sodium acetate trihydrate, sodium chloride, potassium nitrate, dextrose and mannitol were placed in individual bags. The bags were monitored and after 90 days it was determined that the package system prevents the test salts from caking.
  • the purpose of this study was to test the ability of the bags to deliver a cohesive powder that has poor flow characteristics in small qualities.
  • the first test material was L- Glutamine; 240.0 g of the material was added to the bag.
  • the bag was sealed with an end cap, clamp, and clip.
  • the powder was then delivered to a weighted container. The amount delivered was 238.0 g, giving a 99% recovery of the material.
  • the study was repeated with a large quantity of material 9.1 kg of sodium chloride, recovered 9.1 kg near 100% recovery.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Packages (AREA)

Abstract

L'invention concerne un système d'emballage permettant de maintenir l'intégrité physico-chimique du contenu du système d'emballage comprenant : un sac intérieur constitué d'un matériau perméable aux gaz et/ou à l'humidité, un sac extérieur constitué d'un matériau polymère imperméable, un orifice d'évacuation qui fournit un accès à l'intérieur du sac extérieur ; et un déshydratant ou un matériau de piégeage de gaz. La première extrémité du sac extérieur entoure de manière étanche la paroi extérieure de l'orifice d'évacuation. La seconde extrémité du sac intérieur est fermée hermétiquement et le déshydratant ou le matériau de piégeage de gaz est disposé dans un compartiment isolé. La seconde extrémité du sac extérieur est fermée hermétiquement pour isoler l'intérieur par rapport à l'environnement extérieur au système d'emballage.
EP15767875.6A 2014-03-27 2015-03-27 Système d'emballage et procédé permettant d'inhiber l'entrée d'humidité Active EP3122654B1 (fr)

Applications Claiming Priority (2)

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US201461971003P 2014-03-27 2014-03-27
PCT/US2015/022981 WO2015148916A2 (fr) 2014-03-27 2015-03-27 Système d'emballage et procédé permettant d'inhiber l'entrée d'humidité

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EP3122654A2 true EP3122654A2 (fr) 2017-02-01
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US (1) US20170113864A1 (fr)
EP (1) EP3122654B1 (fr)
KR (1) KR101964506B1 (fr)
CN (1) CN106687390B (fr)
BR (1) BR112016022189B1 (fr)
SG (1) SG11201608012WA (fr)
WO (1) WO2015148916A2 (fr)

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CN110371493B (zh) * 2019-08-16 2021-12-07 广东广益科技实业有限公司 脱氧剂及其制作方法
CN111409959A (zh) * 2020-03-27 2020-07-14 郑利 一种化肥及化工产品防结块的方法、防结块剂及应用
CN112478421A (zh) * 2020-12-05 2021-03-12 任杰 一种分层自疏松型袋装干燥剂
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Also Published As

Publication number Publication date
WO2015148916A3 (fr) 2015-11-19
EP3122654B1 (fr) 2019-03-06
BR112016022189A2 (pt) 2017-10-17
KR20170023786A (ko) 2017-03-06
WO2015148916A2 (fr) 2015-10-01
CN106687390A (zh) 2017-05-17
SG11201608012WA (en) 2016-10-28
EP3122654A4 (fr) 2017-12-27
CN106687390B (zh) 2019-09-13
BR112016022189B1 (pt) 2022-08-16
KR101964506B1 (ko) 2019-04-01
US20170113864A1 (en) 2017-04-27

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