WO1996022160A1 - Materiaux d'emballage piegeurs de sulfure - Google Patents

Materiaux d'emballage piegeurs de sulfure Download PDF

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Publication number
WO1996022160A1
WO1996022160A1 PCT/US1996/000258 US9600258W WO9622160A1 WO 1996022160 A1 WO1996022160 A1 WO 1996022160A1 US 9600258 W US9600258 W US 9600258W WO 9622160 A1 WO9622160 A1 WO 9622160A1
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WO
WIPO (PCT)
Prior art keywords
packaging material
pore
molecular sieve
supporting component
zeolite
Prior art date
Application number
PCT/US1996/000258
Other languages
English (en)
Inventor
David Richard Corbin
Donna Lynn Visioli
Original Assignee
E.I. Du Pont De Nemours And Company
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 E.I. Du Pont De Nemours And Company filed Critical E.I. Du Pont De Nemours And Company
Priority to DE69626012T priority Critical patent/DE69626012T2/de
Priority to AU59754/96A priority patent/AU5975496A/en
Priority to CA002223867A priority patent/CA2223867A1/fr
Priority to PCT/US1996/008558 priority patent/WO1996040429A1/fr
Priority to JP50111597A priority patent/JP3564143B2/ja
Priority to EP96917068A priority patent/EP0830203B1/fr
Publication of WO1996022160A1 publication Critical patent/WO1996022160A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B01J20/183—Physical conditioning without chemical treatment, e.g. drying, granulating, coating, irradiation
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S502/00—Catalyst, solid sorbent, or support therefor: product or process of making
    • Y10S502/515—Specific contaminant removal
    • Y10S502/517—Sulfur or sulfur compound removal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1328—Shrinkable or shrunk [e.g., due to heat, solvent, volatile agent, restraint removal, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/232—Encased layer derived from inorganic settable ingredient
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/239—Complete cover or casing

Definitions

  • the present invention relates generally to packaging materials which enhance food freshness by removing hydrogen sulfide and other odorous sulfur products from certain foods. More specifically, the packaging materials of the present invention comprise a defined molecular sieve enclosed by a polymer film or sheet or other material, or embedded within a polymer film or sheet or other material.
  • the packaging materials may be used as a packaging structure (i.e.. a package itself such as a film package), a layer of a film package, or a package insert such as a coupon or liner.
  • sulfur-containing compounds including hydrogen sulfide. mercaptans. sulfides and disulfides.
  • These sulfur compounds can discolor cans containing such food, and there has been an abundance of work directed to can coatings to prevent this discoloration.
  • a more important aspect is the presence of the odor, and often an associated taste, in the food itself.
  • the odor threshold of some of these is very low (10 micrograms/liter or less) . so the presence of even small amounts can. as noted, be very objectionable well before any real deterioration of the food has occurred.
  • Packaging materials capable of scavenging specific decomposition products from food have been disclosed in U.S. Patent No.: 5.284.892 (Brodie and Visioli). Specifically, aldehydes are scavenged by a polyalkylene imine of greater than 800 molecular weight. The imine is incorporated into a packaging film or sheet. Similar scavengers are disclosed in allowed Patent Application, serial number 08/176.740. which extends their use to packaging structures which include liners, inserts and the like. Polyalkylene imines are unsuitable for direct food contact, and so when used, the required packaging structure has to ensure that the imine does not contact the food.
  • Molecular sieves are materials of varying composition which have a three dimensional cage like structure which form channels with defined mouth opening (aperture or pore-opening) sizes . They may be naturally occurring materials, modified natural materials, or essentially synthetic. They include silicas, metalloaluminates. aluminophosphates and various others. The silicas may by subdivided into titanosilicates. aluminosilicates. gallosilicates. ferri silicates, borosilicates. chromosilicates and others. Among the aluminosilicates are the zeolites. Specific zeolites have been used for different purposes including catalysis, sieving and adsorption. Typically, zeolites are defined by parameters such as Si/Al ratio, their pore-opening size and structure. acidity, the cations present and others.
  • Clays may also be aluminosilicates also containing magnesium, but typically have a laminar structure, not a three dimensional structure.
  • Japanese published application. J61.120.638A discloses an adsorbent composite for packaging consisting of a polyolefin related resin and an adsorbent.
  • the adsorbent is broadly disclosed to be any of a diverse range of materials including silica gel. activated alumina, acid clay, activated clay, zeolites or active carbon. Uses include dehumidifying and deodorizing pharmaceuticals, foods, or precision machines.
  • U.S. Patent No. 4.795.482 (Gioffre et al.) discloses a process for removing odors from an 'environment', using certain specific hydrophobic, high silica zeolites and so-called silica polymorphs.
  • Odors removable include those caused by a vast range of volatile materials including certain acids, aldehydes.
  • organic nitrogen contain compounds and sulfur compounds including mercaptans and sulfides.
  • Applications include powders, sprays, pads, creams, mouthwash, and non-woven tissues for treatment of odors in bathrooms, kitchens, refrigerators etc.
  • U.S. Patent No. 5.01 1.019 discloses a packaging structure for packaging medicines which may emit foul odors caused by substances such as carbonic acid, trimethylacetic acid and hydrogen sulfide.
  • the package enclosing the medicine has a metal press-through side, and a multilayer polymer side, one layer of which is an polyolefin layer which incorporates deodorizing materials.
  • the deodorizing materials mentioned as suitable include inorganic metal salts, favonoid. and unspecified molecular sieves.
  • the present invention is directed to novel packaging materials which form packaging structures or package inserts capable of adsorbing sulfur- compound odors generated by certain foods.
  • the packaging material comprises a paniculate aluminosilicate or silica molecular sieve, and an associated structural supporting component.
  • the molecular sieve suitable in the packaging material may be functionally defined as any aluminosilicate or silica having a zeolite-type structure where 5 mg. of it is capable of adsorbing at least 25% of hydrogen sulfide present in a GC vial of volume 22.5 ml. at a concentration of 12.000 ppm. in 15 minutes at a temperature of 25 +/- 2 deg. C.
  • the molecular sieve may be structurally defined as an aluminosilicate or silica having a zeolite-like structure which has a three dimensionally-connected pore-structure all of whose pores-openings have a minimum diameter of about 4 Angstroms, a Si/Al atomic ratio of 1 or greater, and has substantially all of any associated cations those of the metals of group IA and group 2 A metals.
  • the associated structural supporting component may be a polymeric or other material. It may be in the form of a film or sheet either enclosing the molecular sieve or acting as a matrix having the molecular sieve embedded in it.
  • the supporting component must be permeable to sulfides and mercaptans. When the molecular sieve is embedded in the supporting component it is present at a level of from 0.1 to 10 weight percent, preferably from 0.5 to 5 weight percent.
  • the packaging materials comprising the molecular sieve and the associated supporting component may be formed into a package structure itself, the packaging material forming the package walls or part of the package walls. such as a layer in a laminate. Or it may be in the form of an insert such as a coupon, a cap liner and the like.
  • the molecular sieves of this invention are aluminosilicates or silicas having a zeolite-type structure.
  • the aluminosilicates and silicas have the major advantage of being, in general, non-toxic, and suitable for use where contact with food can or does occur. Furthermore, when blended with many polymer films, the film remains transparent, which is a major advantage in packaging films. This is because, the particle size is sufficiently small - typically, from about 0.1 to 10 microns. The lack of toxicity contrasts with packaging materials described in U.S. Patent 5.284.892. where the structure of the packaging material must prevent contact of a polyalkylene imine with food, due to it lack of acceptability in this regard.
  • the suitable molecular sieves of this invention are aluminosilicates or silicas having a zeolite-type structure, which are capable of absorbing a specific amount of hydrogen sulfide from an atmosphere containing it. Specifically, they are those where 5 mg. of it is capable of adsorbing at least 25% of hydrogen sulfide present in a GC vial of volume 22.5 ml. at a concentration of 12.000 ppm. in 15 minutes at a temperature of 25 +/- 2 deg. C. It is within the skill of the artisan to determine readily whether any particular molecular sieve is suitable by this simple test.
  • the suitable molecular sieve may be defined in structural terms.
  • the critical structural parameters suitable for selecting the aluminosilicate and silica molecular sieves for the pu ⁇ oses of this invention are known for many such materials, but those parameters have not been determined for many others. Thus it may be immediately possible to say a given aluminosilicate or silica is suitable for use in the present invention if those parameters are known. In cases where those parameters are not known, the functional testing described above will determine suitability.
  • the molecular sieves which form part of the packaging materials of this invention are complex aluminosilicates or silicates characterized by a three-dimensional framework structure, enclosing cavities and channels. (These are often also referred to loosely as pores; the ends of the channels are usually described as pore-openings, or apertures, and the system of channels is said to have a pore structure).
  • the channels may be occupied by ions and water molecules, all of which can move with significant freedom within the zeolite matrix. The water molecules can be removed or replaced without destroying the essential geometry.
  • M is a cation of valence n. where the cation may be metallic or a proton.
  • x is generally from about 2 to 8.
  • y may be 1 or more.
  • high silica zeolites and more generally aluminosilicate molecular sieves with extremely high levels of silica to alumina, approaching infinity: that is to say only trace amounts of aluminum are present
  • the material is. as noted above, essentially a silica.
  • the cation is associated, primarily, only with the alumina, so that the less aluminum present the fewer cations.
  • molecular sieve will be used, because the term zeolite is often defined as a material having a specific amount of aluminum, and at very low aluminum levels, approaching trace amounts, most common usage of the term zeolite would exclude such materials.
  • M is Na. Ca. K. Mg and Ba in varying proportions.
  • the cations can be changed by ion exchange, and other ions such as Cs or Sr can be introduced.
  • the structure consists of corner-linked tetrahedra with Al or Si atoms at the centers and oxygen at the corners.
  • the tetrahedra are combined into repeat structures of 4 to 12 membered rings resulting in a framework with regular channels and 'cages' at channel intersections.
  • the channels may be one dimensional (i.e..tubular) with the tubes not connected, two dimensional where channels branch to other channels, but each series of two dimensional channels is no connected, or a three dimensionally-connected system of channels.
  • molecules which are sufficiently small can travel freely throughout the channel system or pore- structure.
  • the channels and cages impart a pore-structure with differing dimensions which are critical to movements of molecules into and within the channels and cages, the pore- openings controlling access to the interior of the zeolite.
  • the pore-opening dimensions are determined not only by the tetrahedra forming the pore-opening, but by the ions in or near the pore-opening.
  • the pore-opening is aspherical or generally asymmetrical, and can have a smallest and a largest diameter. The smallest diameter will clearly control access of molecules.
  • the variations within the zeolite structure create a wide variation in utility for various zeolites. The same situation is true for molecular sieves even when the amount of aluminum approaches just trace amounts.
  • the molecular sieves suitable for this invention have a Si/Al atomic ratio which can range from 1 to infinity. By infinity is meant none or only trace amounts of aluminum are present.
  • the ratio may be determined by standard wet chemical methods or by atomic adsorption spectroscopy. In describing this type of material, it is common to use the ratio SiO2/Al203 rather than Si/Al. since this characterizes the chemical units which make up the structure. However in this disclosure, the Si/Al atomic ratio is used. It is of course readily possible to calculate one from the other.
  • the molecular sieves of this invention also have a three dimensional pore-structure, and a minimum pore-opening size of about 4 Angstrom. Pore-opening size may be somewhat temperature dependent, and since adso ⁇ tion in end use has to take place at ambient temperatures, the pore- opening size refers to the size which will be present at ambient temperatures, that is to say between about 20 and 30 degrees C. Methods of determining and calculating pore-opening size are well known in the art. and many molecular sieves have established pore-opening sizes. Useful references generally relating to zeolite-type structure and characterization include the following: Meier et al., 'Atlas of Zeolite Structure Types' (International Zeolite Assn.
  • the molecular sieve must be basic, in that substantially all (i.e. more than about 90%) the associated cations can not be hydrogen ions, but must be a metal ion of group IA or 2A. preferably Na. Ca. Ba. Mg and K. preferably Na and Ca. Ion-exchange with other metals such as zinc (group 2B) are also possible.
  • the molecular sieve's pore-opening size will be large enough to let through the smallest odor causing sulfur compound molecules.
  • the pore- opening size of molecular sieves is a fairly precisely definable quantity.
  • the diameter of molecular species which are to be adsorbed however is more difficult to define.
  • Various types of measurement have been used to determine diameter, and various methods of calculating different aspects of the size of the molecule have been used. When a molecule is unsymmetrical. as in longer chai ⁇ mercaptans.
  • the particles are inco ⁇ orated into a film layer of a package (i.e.. as a filler).
  • the particles should preferably have an average diameter less than half the film thickness, and a size distribution such that no particles have a diameter as thick as the film, and preferably less than three quarters of the thickness of the film. This represents no real problem, since a 1 mil. (25 micron) film could have particles, by this criterion, of 12 microns in diameter which is higher than typical sieve particles.
  • the adsorbent layer may be from about 1 to 5 mils.
  • the paniculate molecular sieve adsorbent obviously is not mixed directly with the food, and is kept separate from it.
  • the adsorbent is part of a * packaging material, the packaging material comprising the adsorbent and an associated structural supporting component.
  • the packaging material comprising the adsorbent and an associated structural supporting component.
  • another material which contains (i.e. as a filler) .
  • the adsorbent may be melt blended, just as with any paniculate filler, into a polymer which is then made into a film which forms the walls or part of the walls of a packaging container.
  • the package may by a film pouch.
  • the pouch of course may be further enclosed in some other package such as a carton.
  • the packaging material of the invention when it is in the form of an adsorbent-filled film may be one layer of a multilayered film or sheet, with other co-extruded or laminated and adhered layers acting as water or oxygen barriers etc. If there are other layers, the absorbent-filled layer may be the layer which contacts the food, unlike the situation where the adsorbent is not suitable for food contact such as polyethylene imine aldehyde scavengers. It ma ⁇ ' however be another layer, provided any inner layers (those between the adsorbent layer and the food) are permeable to the odor-causing sulfur compounds, so that they may pass through it to contact the adsorbent-filled layer.
  • the inner layer could not be a metallic film layer or highly crylstalline polymer or poly(vinylidene) chloride which is a useful barrier. If there is an inner layer, it should not be more than 3 mils thick.
  • the package material may not be part of the package itself, but may be a free insert, such as a coupon. Or it may be an insert which does forms part of the package, such as a cap liner.
  • the packaging material is a free insert, a possibility within the bounds of the present invention is that of the paniculate adsorbent enclosed, i.e. encapsulated by a polymer film or other material, but not blended (i.e.. as a filler) within it.
  • Non-woven materials Other materials which could be used to encapsulate molecular sieve particles are non-woven materials. These would act as ideal encapsulating materials since they are highly porous, provided the pores of the non-woven are not of a size which would let through the molecular sieve particles.
  • Polymers suitable as the associated structural supporting component are olefinic homopolymers such as polypropylene, polyethylenes such as LDPE. LLDPE and ULDPE. copolymers of ethylene and vinyl esters such as vinyl acetate, and copolymers of ethylene and unsaturated acid or esters of those acids such as acrylic or methacrvlic acid, or 1 - 8 carbon alky ] acrylates and methacrvlates.
  • ionomers of ethylene/acrylic acid or methacrvlic acid copolymers and te ⁇ olymers. Ionomers are the well known metal ion partially neutralized ethylene/(meth (acrylic acid copolymers. described in U.S. 3.264.272 (Rees) which is hereby incorporated by reference.
  • the polymers preferred as the structural supporting component are polyolefines and polyolefin copolymers (i.e. with other alpha olefins).
  • adsorbent layer is preferably separated from the food to be packaged only by one layer, that layer being a seal layer which contacts the food.
  • Seal layers may be any of the polymers listed above as the structural supporting component, but preferably ionomers or ethylene vinyl acetate which are ideal adhesives.
  • Other lavers mav be an oxvgen barrier laver such as ethylene/vinyl alcohol copolymers. or a moisture barrier layer which may also be the bulk layer.
  • Suitable polymers for this include polypropylene, polyethylene and polyethylene copolymers.
  • the layers may have various adhesives tying them together, such as 'BYNEL' which is the name for certain modified polyolefins manufactured by E.I. du Pont de Nemours and company.
  • Zeolite M5 (also known as Mordenite) has the required pore- opening sized, but has a one dimensional pore structure. That is to say it has unconnected single channels. Chabazite has a three dimensionally-connected pore structure, but the pore-openings in one of the three dimensions is less than 4 Angstroms. DAY-55 has the necessary pore size, the channels are connected into a three dimensionally-connected pore-structure, but it is acidic, having protons replacing metal ions. Such acidic materials also have the disadvantage of possible reaction with some of the polymeric packaging components of the packaging material. Zeolites 4 A and 5 A adsorbed some hydrogen sulfide alone. but not when inco ⁇ orated into film.
  • the minimum pore-opening is defined as about 4 Angstroms. In any particular sieve the actual mimimum may be from 3.7 to 4.3 Angstroms. It is surmised that the effective diameter for these zeolites under test conditions may be smaller than that quoted, at least in one direction. The zeolites with much larger pore-opening size. Y52 and 13X are clearly better and preferred.
  • Clays have a laminar structure, not a Zeolite-type three dimensional structure.
  • Chabazite (CHA type Zeolite) 3 3.8 x3.8 2 Ca ABSCENTS 3000 (MFI Sieve) 3 5.3 x 5.6 >100
  • Zeolite 4A (LTA Zeolite) 3 4.1 x 4.1 1 Na Sieve SI 15 ( Same as Abscents 3000? Different particle size?) Zeolite DAY-55 3 7.5? 55 H
  • ZnO/TiO2 is Zn2TiO4-Zn2Ti3O8 from Alfa Inorganics. (1 ) ZnO/Zn phosphate calcinated mix as prepared in U.S. Patent No. 5.219,542
  • Zeolites 4A, 13X and Y52 from Alfa Inorganics Zeolites 4A, 13X and Y52 from Alfa Inorganics.
  • Zeolite 5A and M5 (Mordenite) from Linde Abscents 3000 and S 1 15 from UOP Corp.
  • VEEGUM A132A is purified smectite clay (hydrated magnesium aluminum silicate) from R.T.Vanderbilt Co. ; VAN GEL B is smectite clay from Vanderbilt.Co. They are used in the oil industry to adsorb/react with sulfur compounds.
  • Zeolite three letter designations are those of the International Zeolite Association.
  • Powder sample weight was 5 mg.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

La présente invention concerne un matériau d'emballage qui peut absorber des traces infimes de composés sulfurés odorants et volatils provenant de nourriture. Ce matériau d'emballage est composé d'un matériau de support structural, de préférence un film polymère, et d'un tamis moléculaire défini. Le matériau d'emballage peut se présenter sous forme de film constituant au moins une couche d'un emballage pelliculaire, ou sous forme de joint ou d'insert. Ledit tamis moléculaire peut être défini soit par sa capacité mesurée à adsorber le sulfure d'hydrogène, ou par certains paramètres structuraux physiques ou chimiques, tels que la taille d'ouverture des pores, le rapport atomique Si/Al, la dimensionalité de la structure des pores et la basicité.
PCT/US1996/000258 1995-01-17 1996-01-11 Materiaux d'emballage piegeurs de sulfure WO1996022160A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE69626012T DE69626012T2 (de) 1995-06-07 1996-06-04 Sulfidabtrennendes verpackungsmaterial
AU59754/96A AU5975496A (en) 1995-06-07 1996-06-04 Sulfide scavenging packaging materials
CA002223867A CA2223867A1 (fr) 1995-06-07 1996-06-04 Materiaux d'emballage supprimant les sulfures
PCT/US1996/008558 WO1996040429A1 (fr) 1995-06-07 1996-06-04 Materiaux d'emballage supprimant les sulfures
JP50111597A JP3564143B2 (ja) 1995-06-07 1996-06-04 硫化物除去包装材料
EP96917068A EP0830203B1 (fr) 1995-06-07 1996-06-04 Materiaux d'emballage supprimant les sulfures

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37382595A 1995-01-17 1995-01-17
US08/373,825 1995-01-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5834079A (en) * 1996-03-07 1998-11-10 W. R. Grace & Co.-Conn. Zeolite in packaging film
US6365245B2 (en) 1996-03-07 2002-04-02 Cryovac, Inc. Zeolite in packaging film
EP1773140A1 (fr) * 2004-06-25 2007-04-18 Cryovac, Inc. Procédé pour retirer les odeurs de soufre des emballages

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159056A2 (fr) * 1984-03-27 1985-10-23 Shell Internationale Researchmaatschappij B.V. Procédé pour éliminer du sulfure d'hydrogène de gaz et absorbant pour un tel procédé
EP0297543A2 (fr) * 1987-06-30 1989-01-04 Uop Procédé pour la séparation d'odeurs organiques et compositions pour l'utilisation dans ce procédé
JPH02233138A (ja) * 1989-03-06 1990-09-14 Tosoh Corp 脱臭シート
JPH02290220A (ja) * 1988-07-02 1990-11-30 Tokai Kagaku Kogyosho:Kk 板状乾燥剤
JPH06107847A (ja) * 1992-09-30 1994-04-19 Fuji Kagaku Kogyo Kk 脱臭性樹脂

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159056A2 (fr) * 1984-03-27 1985-10-23 Shell Internationale Researchmaatschappij B.V. Procédé pour éliminer du sulfure d'hydrogène de gaz et absorbant pour un tel procédé
EP0297543A2 (fr) * 1987-06-30 1989-01-04 Uop Procédé pour la séparation d'odeurs organiques et compositions pour l'utilisation dans ce procédé
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