WO2006024937A1 - Recipient permeable a l'humidite - Google Patents
Recipient permeable a l'humidite Download PDFInfo
- Publication number
- WO2006024937A1 WO2006024937A1 PCT/IB2005/002610 IB2005002610W WO2006024937A1 WO 2006024937 A1 WO2006024937 A1 WO 2006024937A1 IB 2005002610 W IB2005002610 W IB 2005002610W WO 2006024937 A1 WO2006024937 A1 WO 2006024937A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- container
- seal
- container according
- layers
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 85
- 239000002274 desiccant Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- -1 polyethylene Polymers 0.000 claims description 37
- 239000004698 Polyethylene Substances 0.000 claims description 29
- 229920000573 polyethylene Polymers 0.000 claims description 29
- 239000012229 microporous material Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000001110 calcium chloride Substances 0.000 claims description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 7
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 238000005304 joining Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 229960000892 attapulgite Drugs 0.000 claims description 2
- 239000000440 bentonite Substances 0.000 claims description 2
- 229910000278 bentonite Inorganic materials 0.000 claims description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 239000005022 packaging material Substances 0.000 description 9
- 238000004806 packaging method and process Methods 0.000 description 5
- 239000003205 fragrance Substances 0.000 description 3
- 239000002648 laminated material Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229920013683 Celanese Polymers 0.000 description 1
- 241000207199 Citrus Species 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 244000178870 Lavandula angustifolia Species 0.000 description 1
- 235000010663 Lavandula angustifolia Nutrition 0.000 description 1
- 241000220225 Malus Species 0.000 description 1
- 235000011430 Malus pumila Nutrition 0.000 description 1
- 235000015103 Malus silvestris Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000020971 citrus fruits Nutrition 0.000 description 1
- 238000012505 colouration Methods 0.000 description 1
- 239000001102 lavandula vera Substances 0.000 description 1
- 235000018219 lavender Nutrition 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/027—Thermal properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4541—Gas separation or purification devices adapted for specific applications for portable use, e.g. gas masks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/44—Number of layers variable across the laminate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
Definitions
- This invention relates to moisture permeable containers and to a method of manufacture thereof.
- Containers that absorb water vapour, water, liquids and the like are well known in the art.
- these containers have packaging consisting of one or more micro- porous materials formed from fibrous or film products sealed together at the edges of the packaging.
- the packaging material usually encapsulates a desiccant material, such as silica gel, anhydrous calcium chloride or activated clay.
- the volume of water or water vapour absorbed by the container is generally determined by the absorbent capacity of the desiccant material contained within the container.
- Conventional desiccant containers, and other types of breathable containers are usually formed by either using adhesives, coatings and/or laminated materials in order to incorporate the breathable material into the design.
- the strength of the container is directly linked to the strength of the adhesives and/or coatings and/or laminated materials and the breathable materials, and especially the way that these different materials are incorporated into the container with the breathable material.
- packaging materials for these containers there are, however, significant problems with the production of packaging materials for these containers and their use with specific types of desiccant materials.
- at least one side of the packaging material is generally coated with an adhesive. Films laminated with adhesives do not form a strong bond between the layers, which is desirable for desiccant packaging.
- coated films are more expensive than uncoated films, packaging materials formed using coated films tend to be more expensive than those formed from uncoated films.
- breathable packaging materials such as TyvekTM, GORE-TEXTM (Gore & Co. Gmbh), SKY AIRTM and CelgardTM. These materials are designed to be porous and generally do not give much stability to a breathable container (both to the seal and structure).
- the breathable materials are incorporated in some or other form (for example, laminated, coated, glued, sealed to a laminate or the like) in the structural seals that form the breathable container.
- a moisture permeable container including a first portion and a second portion adhered to each other so as to form an enclosed pocket, wherein the first portion includes: a first layer of a moisture permeable material; a second layer of material covering at least a peripheral zone on at least htree edges of an inner surface of a first layer so as to form a first or primary seal; and a third layer of a moisture permeable material which is adhered to the first layer by the second layer, so as to form a second or secondary seal; and wherein the second portion includes at least a fourth layer of material which is adhered to at least three edges of the first portion so as to form a third or container seal and wherein the container seal does not overlap with at least an inner portion of the secondary seal.
- the third layer may optionally only partially overlap the second layer on one or more edge of the first portion, so that a portion of the second layer on one or more of the edges of the first portion is adhered directly to the second layer.
- the desiccant container may include a fifth layer of a removable, nonporous material.
- the fifth layer may be located on an outer surface of the first layer.
- the fifth layer may be adhered to the first layer by means of a low-strength adhesive that permits the fifth layer to be peeled off the first layer.
- the fourth layer may be a nonporous material.
- the second portion of the container may include two or more layers.
- the second portion may include three layers that are similarly joined as the layers of the first portion, so as to form a container where both the first and second portions are capable of absorbing moisture.
- the moisture permeable material of the first layers may be a micro-porous, porous, fibrous, and/or monolithic material.
- the first layer is a fibrous material such as paper and more particularly, a wet strength paper and/or a bond paper.
- the first layer is a microporous material formed from polyethylene or polypropylene, such as a polyethylene spun-bonded paper or a polypropylene-based film.
- the material of the first layer may have a higher sealing temperature than the material of the second layer.
- the material forming the second layer may be a porous; fibrous and/or non-breathable material.
- the material is typically a non-breathable material.
- the material is preferably a high seal-strength material.
- Suitable materials for the second layer are polyethylene, polypropylene, polyester, polyolefin, monolithic polymer and uncoated poly-olefinic polyethylene materials.
- the second layer may be heat sealed to the first layer.
- the second layer may be formed form a sheet having a zone that is punched, cut out or otherwise rendered moisture permeable prior to or at the time of sealing to the first layer, so that moisture is able to pass from the first layer through to the third layer.
- the moisture permeable material of the third layer may be a micro-porous, porous or monolithic material, such as a monolithic polyester material.
- the third layer preferably does not permit the passage of water molecules in liquid form therethrough.
- the fourth layer may be any suitable non-breathable material that can be joined by the second layer to the first layer.
- the second portion may be formed from folding the first portion into two, thereby forming the first and second portions.
- the container may include a desiccant material such as a hygroscopic desiccant substance, silica gel, bentonite clay, sodium chloride, potassium chloride, lithium chloride, calcium chloride, magnesium chloride, attapulgite clay, magnesium sulfate, starch, clay and/or a super absorbent or mixtures thereof.
- a desiccant material such as a hygroscopic desiccant substance, silica gel, bentonite clay, sodium chloride, potassium chloride, lithium chloride, calcium chloride, magnesium chloride, attapulgite clay, magnesium sulfate, starch, clay and/or a super absorbent or mixtures thereof.
- the desiccant material is preferably located between the third layer of the first portion and the second portion.
- An absorption indicator may be provided for indicating the degree of water absorption by the desiccant material.
- the absorption indicator may include visual indicating means, such as a colouration or discolouration indicating means.
- One or more of the layers may include a substantially transparent portion for viewing the absorption indicator.
- the desiccant container may include a fragrance.
- the fragrance may be incorporated in one or more of the layers of the container, or may be included in the desiccant material.
- a method of manufacturing a moisture permeable container including the steps of: adhering a second layer of a high-strength adhesive material to a peripheral zone of a first layer of a moisture permeable material, the second layer covering only the peripheral zone of the first layer, thereby forming a first seal joining the first and second layers; adhering a third layer of a moisture permeable material to at least a portion of the second layer, thereby forming a second seal joining the first, second and third layers; and adhering the peripheral edges of a fourth layer to an exposed zone of the second layer or to an outer edge of the third layer, thereby forming a third seal, whereby the third seal does not overlap the second seal completely.
- the first and second seals may be formed consecutively or simultaneously.
- the third seal may be stronger than the second seal.
- a desiccant substance substantially as described above may be inserted into a pocket formed between the third and fourth layers, whereafter the unsealed portion of the fourth and second layers may be sealed.
- the seals may be formed by heat sealing, bonding, laminating, gluing or the like.
- the first, second, third and fourth layers may be substantially as described above.
- the layers may form first and second portions of the desiccant container as described above.
- a fifth layer of a non-breathable material may also be removably adhered to an outer portion of the first layer.
- Figure 1 shows a sectional side view of a first embodiment of a container in accordance with the invention
- Figure 2 shows an exploded view of a portion of the container of Figure 1 showing the first and second sealing areas;
- Figure 3 shows a front view of the inner side of the first portion of a container of Figures 1 and 2;
- Figure 4. shows a sectional side view of a second embodiment of a container in accordance with the invention;
- Figure 5 shows a sectional side view of a third embodiment of a container in accordance with the invention.
- Figure 6 shows a sectional side view of a fourth embodiment of a container in accordance with the invention
- Figure 7 shows a sectional side view of a fifth embodiment of a container in accordance with the invention
- Figure 8 shows a front view of two alternative methods for aligning the first and second portions of a container in accordance with the invention.
- Figure 9 shows a sectional side view of a sixth embodiment of a container in accordance with the invention.
- Figure 10 shows a sectional side view of a sixth embodiment of a container in accordance with schematic drawings.
- Figure 11 shows an exploded view of the container of Figure 10.
- Figure 12 shows the view of Figure 11 , but also including layer 4 forming the second portion.
- the invention provides a container having first and second portions which are at least partially sealed together to form a pocket. At least one, and optionally both, of the first and second portions is moisture permeable to allow water vapour to be absorbed within the pocket, by for example, dessicant material.
- the first portion is composed of at least three layers, and the second portion has at least one layer, but optionally two or more layers.
- Figure 1 shows a first embodiment of a desiccant container 10.
- the container 10 is formed from a first portion 20 consisting of a first layer 30, a second layer 40 and a third layer 50, and a second portion 60 consisting of only one layer.
- a desiccant material 70 is contained within a pocket 80 formed by the first 20 and second 60 portions.
- a fifth layer 90 is removably attached to an outer surface of the first layer 30.
- the first layer 30 is formed from any suitable moisture permeable material, which may be breathable or monolithic.
- the material may be porous and/or micro- porous material, such as CelgardTM (Hoechst Celanese Corporation), GORE-TEXTM (Gore & Co. GmBH) and TyvekTM (E. I. DuPont).
- the micro-porous material is a polyethylene or polypropylene-based micro-porous layer, and more preferably a polyethylene spun-bonded paper such as TyvekTM1059B or 1037B, or a polypropylene- based film, such as GDT II, manufactured by San Ai Ltd of Osaka, Japan.
- the second layer 40 is generally a non-breathable material such as polyethylene.
- the third layer 50 is preferably a micro-porous breathable polyethylene material, such as TyvekTM, GORE-TEXTM, CelgardTM, EspoirTM, or SKY AIRTM.
- the fourth layer 60 is preferably a laminated polyester and polyethylene sheet, with the polyethylene surface 62 facing inwards and the polyester surface facing outwards.
- the fifth layer 90 is preferably a non-breathable easy peel sheet that could be peeled off the first layer 30 to activate the container 10 by allowing it to absorb vapour.
- Figure 2 shows an enlarged view of a portion of the container 10 of Figure 1 , showing the different seals that are formed when manufacturing the container 10.
- the first and second layers, 30 and 40 respectively, are laminated, joined and/or sealed to each other to form a primary seal 100.
- the primary seal 100 covers some, but not all of the first layer 30.
- the second layer 40 covers only the edges of the first layer 30, forming a frame around the first layer 30.
- the second layer 40 may be a coating applied to the first layer 30 during printing process, the only difference is that the coating is printed onto the reverse side of the first layer 30 (i.e. the side that will face into the container).
- the coating is applied by a "turner bar" in the printing process, and the coating is then synced with the actual printing.
- the coating is printed onto the first layer 40 as a frame that runs along the edges of the first layer 40, as well as along what will be the top and bottom portion of each first layer once the roll of the material forming the first layer has been cut to size.
- the printing process could be a normal flexo or grafire process.
- Typical adhesive coatings are those that are compatible with the printing process and that are capable of being heat sealed to the third layer 40.
- the coating is also preferably waterproof, or at least water-resistant.
- the third layer 50 is then laminated, joined or sealed to the second layer 40 to form a secondary seal 110.
- a clearly defined zone is formed where the primary and secondary seals do not overlap, called the container seal area 120 is formed. This allows for a very strong heat seal to be formed either with other container seal areas in the container 10, and/or with conventional polymeric materials such as polyethylene.
- the first portion 20 is visible from an inner side of the container 10, with the first layer 30 being on the outer side and the third layer 50 being on the inner side.
- the second and third layers 40, 50 are cut away to show only the first layer 30; from viewpoint Y, only the third layer 50 is cut away to show the sealed first and second layers 30, 40; and from viewpoint Z, where no layers have been cut away, only the second and third layers 40, 50 are visible.
- the primary seal 100, secondary seal 110 and container seal area 120 are also shown.
- a sectional side view of a desiccant container 200 is shown with particular reference to the sealing areas of the first, second, third and fourth layers 230, 240, 250 and 260, respectively.
- a primary seal 300 is formed between the first layer 230, which is made from paper, and the second layer 240, which is made from polyethylene.
- a secondary seal 310 is then formed between the second polyethylene layer 240 and the third layer 350, which is made from a micro-porous material such as EspoirTM.
- a fourth layer 260 consisting of laminated polyethylene 262 and polyester 264 sheets is sealed to a zone of the second layer 240 referred to as the container seal area, to form a container seal 320.
- the container seal area is a zone of the primary seal 300 that does not overlap with the secondary seal 320.
- the container seal forms a pocket 280 for containing a desiccant material 270, in particular, calcium chloride.
- the secondary seal 310 be a separate seal from the container seal 320.
- the container seal 320 together with the primary seal 300, will absorb the bulk of stress which may be applied to the container 300, and will protect the secondary seal 310 from forces that impact on the container 200, for example, when the container is dropped, stepped on and the like.
- the relatively much stronger container seal 320 will provide the desiccant container 200 with sufficient strength and stability to withstand handling forces normally associated with these containers.
- the desiccant container 400 includes a primary seal 500 formed from a first layer 430 that incorporates TYVEKTM and a second layer 440 that incorporates polyethylene.
- a secondary seal 510 is formed between the polyethylene of the second layer 440 and a third layer 450 of a micro-porous material such as EspoirTM.
- a fourth layer 460 consisting of laminated polyethylene 462 and polyester 464 sheets is sealed to the second layer 440 in a container seal area only, to form a container seal 520.
- the container seal 520 defines a pocket 480 for containing a desiccant material 470, such as calcium chloride.
- the desiccant container 600 includes a primary seal 700 formed from a first layer 630 that incorporates paper and a second layer 640 that incorporates polyethylene.
- a secondary seal 710 is formed between the polyethylene of the second layer 640 and a third layer 650 of a micro-porous material such as EspoirTM.
- a fourth layer 660 of polyethylene is sealed to the second layer 640 in a container seal area only, to form a container seal 720.
- the container seal 720 defines a pocket 680 for containing a desiccant material 670, such as calcium chloride.
- the desiccant container 800 includes a primary seal 900 formed from a first layer 830 of paper and a second layer 840 of polyethylene.
- a secondary seal 910 is formed between the polyethylene of the second layer 840 and a third layer 850 of a micro-porous material such as EspoirTM.
- a fourth layer 860 of clear polyethylene is sealed to a fifth layer 890 of paper, and the fourth layer 860 is then sealed to the second layer 840 in a container seal area only, to form a container seal 920.
- the container seal 920 defines a pocket 880 for containing a desiccant material 870, such as calcium chloride.
- the fifth layer 890 may have a cut-out area which forms a window 810, thereby permitting a user to view the contents of the container 800.
- Layers 1 , 2 and 4 could also as an alternative be made from the same sheet of combined paper and polyethylene. The next figure explains this more clearly.
- the desiccant material 870 may also include a visual indicating means, such as a colour indicator (not shown) that changes colour when a certain amount of vapour has been absorbed.
- a colour indicator (not shown) that changes colour when a certain amount of vapour has been absorbed.
- the colour change could be used to indicate to a user that the desiccant container 800 should be replaced.
- One or more of the layers of the desiccant container 800 and/or the desiccant material 870 may also include a fragrance, such as lavender, apple, citrus or the like, to freshen the air in the region of the container 800.
- Figure 8 shows two alternative methods of aligning the layers of the desiccant container, and will be described, by way of example only, using the same reference numerals as thosed used in Figures 1 and 2.
- the first portion 20 (comprising the first, second and third layers) is sealed to the second portion 60 by aligning the container seal area 120 on the first portion 20 with the forth layer 60 to form a framed container seal 1 000 along the edges of the container 10.
- the first portion 20 is folded in order to align the container seal area 120 with an inside portion of the folded material.
- the final container seals could either be on the edges of the container 1000 or at the top and bottom as well as the middle 1001 of the container 10.
- FIG. 9 a sectional side view of yet another embodiment of a desiccant container 1100 is shown.
- the moisture permeable container 1100 includes primary 1200 and secondary 1210 seals on both sides of the container 1000.
- the layers 1130, 1140, 1150, 1160 and 1170 are aligned in order to seal only container seal areas of both portions, for also surrounding at least partially a desiccant material 1170.
- the desiccant material 1170 is calcium chloride.
- the third layer covers the entire edge of at least one side of the second layer.
- the layer forming the second portion is adhered to the third layer to form the container seal, rather than mostly to the second layer (as occurs in the first embodiment).
- care must be taken during the formation of the container seal (i.e. the seal formed between the third layer of the first portion and the second portion) to ensure that it does not overlap completely with the secondary seal (i.e. the seal formed between the second layer and third layer). In this way, the portion of the secondary seal that does not overlap the container seal is located within the container that is formed by the container seal.
- the second layer in another embodiment (not shown), it is also possible for the second layer to cover the first layer entirely, but to be only sealed to a portion of the first layer to form the primary seal substantially as described above.
- the portion of the second layer that is not sealed to the first layer should be breathable or made breathable, by perforations or punch marks, for example, so as to allow vapour to pass through the second layer.
- the invention described above is advantageous in that it provides a moisture permeable container having a high seal strength, and with high strength materials in the areas that require these, thereby to protect the container from leaking and/or bursting, while still allowing optimal water vapour absorption. It will be understood by a person skilled in the art that it is possible to alter the material used, while still remaining within the spirit and scope of the invention.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Packages (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2004/7073 | 2004-09-03 | ||
ZA200407073 | 2004-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006024937A1 true WO2006024937A1 (fr) | 2006-03-09 |
Family
ID=35276689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2005/002610 WO2006024937A1 (fr) | 2004-09-03 | 2005-09-05 | Recipient permeable a l'humidite |
Country Status (1)
Country | Link |
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WO (1) | WO2006024937A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015135656A1 (fr) * | 2014-03-13 | 2015-09-17 | Va-Q-Tec Ag | Panneau isolant sous vide et contenant équipé de panneaux isolants sous vide |
EP3012009A4 (fr) * | 2013-06-21 | 2017-02-08 | Mitsubishi Gas Chemical Company, Inc. | Récipient contenant un absorbant |
CN110394036A (zh) * | 2019-08-25 | 2019-11-01 | 无锡商业职业技术学院 | 食品干燥剂及其制备方法 |
WO2022271890A1 (fr) * | 2021-06-23 | 2022-12-29 | Celgard, Llc | Matériau stratifié et sacs de déshydratant le comprenant |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4421235A (en) * | 1979-02-08 | 1983-12-20 | Mitsubishi Gas Chemical Co. Inc. | Oxygen absorbent-containing bag and container sealing member having the same |
US4856649A (en) * | 1987-03-02 | 1989-08-15 | Mitsubishi Gas Chemical Company, Inc. | Deoxidizer parcel |
JPH0568842A (ja) * | 1991-09-09 | 1993-03-23 | S T Chem Co Ltd | 除湿剤 |
US20030235664A1 (en) * | 2002-06-20 | 2003-12-25 | Rick Merical | Films having a desiccant material incorporated therein and methods of use and manufacture |
-
2005
- 2005-09-05 WO PCT/IB2005/002610 patent/WO2006024937A1/fr not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4421235A (en) * | 1979-02-08 | 1983-12-20 | Mitsubishi Gas Chemical Co. Inc. | Oxygen absorbent-containing bag and container sealing member having the same |
US4856649A (en) * | 1987-03-02 | 1989-08-15 | Mitsubishi Gas Chemical Company, Inc. | Deoxidizer parcel |
JPH0568842A (ja) * | 1991-09-09 | 1993-03-23 | S T Chem Co Ltd | 除湿剤 |
US20030235664A1 (en) * | 2002-06-20 | 2003-12-25 | Rick Merical | Films having a desiccant material incorporated therein and methods of use and manufacture |
Non-Patent Citations (1)
Title |
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PATENT ABSTRACTS OF JAPAN vol. 017, no. 388 (C - 1086) 21 July 1993 (1993-07-21) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3012009A4 (fr) * | 2013-06-21 | 2017-02-08 | Mitsubishi Gas Chemical Company, Inc. | Récipient contenant un absorbant |
WO2015135656A1 (fr) * | 2014-03-13 | 2015-09-17 | Va-Q-Tec Ag | Panneau isolant sous vide et contenant équipé de panneaux isolants sous vide |
US9975686B2 (en) | 2014-03-13 | 2018-05-22 | Va-Q-Tec Ag | Vacuum insulation panel and container comprising vacuum insulation panels |
CN110394036A (zh) * | 2019-08-25 | 2019-11-01 | 无锡商业职业技术学院 | 食品干燥剂及其制备方法 |
WO2022271890A1 (fr) * | 2021-06-23 | 2022-12-29 | Celgard, Llc | Matériau stratifié et sacs de déshydratant le comprenant |
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