EP0213058A2 - Geschlossene Verpackung und Verfahren zum Herstellen dieser Verpackung - Google Patents

Geschlossene Verpackung und Verfahren zum Herstellen dieser Verpackung Download PDF

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Publication number
EP0213058A2
EP0213058A2 EP86630126A EP86630126A EP0213058A2 EP 0213058 A2 EP0213058 A2 EP 0213058A2 EP 86630126 A EP86630126 A EP 86630126A EP 86630126 A EP86630126 A EP 86630126A EP 0213058 A2 EP0213058 A2 EP 0213058A2
Authority
EP
European Patent Office
Prior art keywords
adhesive
container
film
tray
package
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.)
Withdrawn
Application number
EP86630126A
Other languages
English (en)
French (fr)
Other versions
EP0213058A3 (de
Inventor
Paul Lyle Fehrenbach
Thomas Edward Hopton
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.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
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 Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of EP0213058A2 publication Critical patent/EP0213058A2/de
Publication of EP0213058A3 publication Critical patent/EP0213058A3/de
Withdrawn legal-status Critical Current

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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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • 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
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks

Definitions

  • This invention relates to a method of making a leak proof sealed package of food-like stuff and to said package and to the container. More particularly, this invention relates to a method of sealing the seam or seams formed by handwrapping, semi-automatic or automatic wrapping machine to seal the film to the bottom of the container with an adhesive seal to prevent leakage of fluids, such as juice from red meats or poultry.
  • Fresh, moist foods such as red meats, poultry and produce have long been wrapped in some type of tray container or support and overwrapped with a flexible packaging film; the most commonly used being thin gauge plasticized PVC.
  • a device was used to seal the film making the package remain tight and leakproof.
  • a fusion seal of the overwrapping film was difficult to achieve consistently and reliably by this process.
  • the package seal could loosen and become wet and unattractive in the display case. Juices of red meat and poultry might leak into the display case and/or upon the hands and clothes of customers who handle the packages. Equipment manufacturers have not been able to resolve this problem satisfactorily.
  • This invention in its main aspects supplies a method of positively sealing the film to the bottom of the container with an adhesive.
  • Another aspect of this invention is to supply a method of obtaining a positive seal between the tray or container and the film utilizing conventional packaging equipment or hand wrapping .
  • our invention permits positive seals to be obtained of meat and poultry packages.
  • any of the packaging films and preferably those capable of heat sealing may be used in this invention, it will be described in its preferred aspect with a clear, flexible film that meets the governmental regulations for food contact such as the well known PVC or other polyolefin films.
  • These wrapping films are well known and widely available from many commercial sources. Specific examples of satisfactory films are the packaging films of about 0.3 to about 10 and preferably 0.5 to 1.5 mils thick made and available as polyvinyl chloride (PVC), polyvinylidene chloride (Saran), ethylene vinyl acetate (EVA), polyethylene, polypropylene and flexible butadiene styrene copolymer (SBR) film to name a few of those well known and readily available for this purpose of wrapping food stuff such as meat and poultry.
  • the polyester films such as PET are also available and used for this purpose.
  • the boards or containers viz. trays, useful in making the packages of this invention are likewise well known and readily available commercially. They fall into three broad categories: cellulosic, foam materials and solid plastic. Generally, the first two are referred to as paper board composition or foam composite trays.
  • the fiber board trays or containers are widely used for the wet meats such as pork and chicken. Styrene foam trays may be used with a paper soaker mat or pad to absorb the fluids.
  • these trays or boards are generally rectangular and have upward extending sides and are supplied in packages stacked one on top of the other.
  • Each individual tray or container is removed from the package and filled with red meat such as beef, pork, chicken, fish or related food product and then wrapped in a suitable film from a supply roll with the overlapped or seam area of the package being under the bottom of the container.
  • the wrapped package is placed on the belt sealer or other wrapping equipment to be wrapped and sealed.
  • the lapped film along the bottom of the package which in some instances will vary from 2 layers up to 5 layers in the so-called pockets of the side folds is sealed. It is generally these 3 to 5 layers of the so-called pockets where the leaks occur in the current practice under the stress and handling operations.
  • Part of the chilling, labeling, cartonizing and multiple shipping may occur with centralized processing and may place greater stress on the package.
  • a positive seal can be obtained not only in the single layer but the 3 to 5 and higher layers of the so-called pockets with the bottom of the tray by applying a coating or seam of adhesive along the perimeter or rectangular area of the bottom of the tray or container, and then following in one embodiment the usual wrap procedure where the heat of the conventional belt heat sealer achieves a seal between the bottom of the container and the film by the adhesive from the coat or seam thereof.
  • the weight of the package is sufficient to cause sealing but additional pressure of from a fraction of a pound to about 8-10 psi is sufficient to give satisfactory sealing.
  • the temperature used is a function of the adhesive, the film and the tray but it should be sufficient to seal the film in the equipment used. Some machines use up to 190 to 198°C for about 1 to 5 seconds. Alternately the package may be sealed by hot air from a blow gun or similar hot air means.
  • the adhesives useful in this invention are those well known and readily available for adhering films and are the well known classes of water emulsion, adhesives, the solvent adhesives and the hot melt adhesives. These adhesives are made using the well known polymers and copolymers such as butadiene styrenes, polyisoprenes, the blocked diene polymers or copolymers, natural rubber, polyvinyl acetate, polyester, ethylene polyvinyl acetate, the natural or hydrocarbon waxes, resins and wood resins.
  • a seam of adhesive 18 is shown applied essentially around the perimeter of tray bottom 12.
  • the width of the perimeter may be extended until the adhesive fills the entire area designated by numeral 20.
  • Another option is to spray coat or doctor coat the bottom of the tray or any other method normally used in applying adhesive to the bottom thereof.
  • Chopped up chicken or pork products were placed in polystyrene poultry trays. It should be appreciated that the tray manufacturer could apply the adhesive to the tray at the time of its manufacture and thus sell the packager a tray having the adhesive preapplied to the bottom thereof.
  • Each of the trays prior to use was coated with a 0.5 mil coat of a waterbased emulsion adhesive, Pliobond 7005 T ", by spraying, doctoring and print rolling and then the adhesive coat was dried to give a clear and tackless coating on the tray. Then the trays coated with the dry adhesive and containing the meat were wrapped in the normal manner with 100 gauge VitawrapTM, a plasticized PVC food film.
  • the film was sealed by placing the package on an automatic wrapping machine, WeldotronTM A-12 and heat sealed at about 195°C and a fraction of pound pressure for about 1 to 3 seconds. Alternately another package was sealed by hot air from a blow gun. The resulting sealed packages were subjected to storage in a freezer and other handling without spillage of meat fluids as was experienced with packages sealed without the adhesive coat.
  • the Vitawrap filmTM above can be replaced by a polyester film or other commercial wrap films and good seals are obtained according to this invention.
  • the hot melt adhesives of the polyester type are particularly desirable with the polyester film and may be applied as a seam or coat to the bottom of the tray.
  • a hot melt adhesive sheet of about 0.1 to 5 mils and preferably about 0.3 to 1.5 is placed between the bottom of the tray and the film and then heat sealed to give satisfactory leakproof packages.
  • These hot melt adhesive sheets may be obtained by any of the well known sheet making techniques such as extruding, casting or doctoring the hot melt adhesive onto a satisfactory surface.
  • containers are provided made of cellulosic or styrene foam having a shape to display meats and related food stuff in essentially three dimensions as the top and sides of the packages are viewable since the bottom of the tray has relatively short sides - usually less than 2.5cm to give a flat tray appearance or a flat board appearance as the sides relatively speaking give the container the appearance of a thick board in one perspective.
  • These see-throughable trays are generally made of clear plastics and can not have the paper soak mats to absorb the juices.
  • the clear trays generally are more flexible and deform more in semi-automatic and automatic packaging equipment, therefore, it is more difficult to get satisfactory seals with the clear plastic trays and these packages are often spoken of as messy.
  • a series of clear plastic trays made of rigid polyvinyl chloride (PVC), polyethylene terephthalate (PET) and polystyrene are each coated along the entire bottom surface of the tray with a water emulsion of ethylene vinyl acetate adhesive by painting the adhesive on to give a dry, clear coating about 0.5 to 1 mil thick.
  • the adhesive should yield a clear coating in the thickness range being used, where the packages are sold in some states whereas in other states it is immaterial.
  • the clear hot melt adhesive i.e., VPE 10035 or VPE 4709 can be used to coat the bottom of these clear plastic trays and then they can be used to obtain satisfactory clear, leak proof wrapped package.
  • the most preferred adhesives for use in this invention form an adhesive bond between the film and the tray that fails cohesively. While no minimum bond strength is essential so long as the film to tray bond remains liquid tight, it is preferred that a bond strength of about 0.5 to 5, more preferably 1 to 3 psi be attained on a 1 inch (2.54cm) strip of film in a peel test. In addition, adhesive must be selected which is not adversely affected by liquid or liquids present in the food stuff.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Packages (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Wrappers (AREA)
EP86630126A 1985-08-15 1986-08-12 Geschlossene Verpackung und Verfahren zum Herstellen dieser Verpackung Withdrawn EP0213058A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76575985A 1985-08-15 1985-08-15
US765759 1991-09-26

Publications (2)

Publication Number Publication Date
EP0213058A2 true EP0213058A2 (de) 1987-03-04
EP0213058A3 EP0213058A3 (de) 1988-05-25

Family

ID=25074411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86630126A Withdrawn EP0213058A3 (de) 1985-08-15 1986-08-12 Geschlossene Verpackung und Verfahren zum Herstellen dieser Verpackung

Country Status (9)

Country Link
EP (1) EP0213058A3 (de)
JP (1) JPS6241022A (de)
KR (1) KR870002008A (de)
AU (1) AU6115786A (de)
BR (1) BR8603687A (de)
DK (1) DK387286A (de)
NO (1) NO863281L (de)
NZ (1) NZ217125A (de)
ZA (1) ZA865784B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251419A (en) * 1990-11-14 1992-07-08 Envirodyne Ltd "Substantially leakproof package and method of forming same"
WO1999046180A1 (en) * 1998-03-13 1999-09-16 Aetna S.P.A. Multiple pack for cans arranged side by side and combined with a support made of board or the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE233382C (de) *
US2864710A (en) * 1955-04-21 1958-12-16 American Can Co Display package and method of producing same
US3116154A (en) * 1962-03-23 1963-12-31 Jr Herbert Rumsey Package for food product and method of making the same
DE1893482U (de) * 1964-02-19 1964-05-21 Max Rainer Verpackung fuer bakterien-anfaellige waren.
US3890763A (en) * 1973-10-09 1975-06-24 Huntington Ind Inc Packaging machine and method
GB1510384A (en) * 1975-10-21 1978-05-10 Wardwell C Frangible bonding using blush lacquer and packaging bonded therewith
DE3128820A1 (de) * 1981-07-21 1983-02-10 Unilever N.V., 3000 Rotterdam Verpackung fuer tafeln, wuerfel oder riegel, insbesondere aus schokoladenhaltigem material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251419A (en) * 1990-11-14 1992-07-08 Envirodyne Ltd "Substantially leakproof package and method of forming same"
WO1999046180A1 (en) * 1998-03-13 1999-09-16 Aetna S.P.A. Multiple pack for cans arranged side by side and combined with a support made of board or the like

Also Published As

Publication number Publication date
BR8603687A (pt) 1987-03-10
JPS6241022A (ja) 1987-02-23
NZ217125A (en) 1988-10-28
DK387286A (da) 1987-02-16
NO863281L (no) 1987-02-16
EP0213058A3 (de) 1988-05-25
AU6115786A (en) 1987-02-19
KR870002008A (ko) 1987-03-28
DK387286D0 (da) 1986-08-14
NO863281D0 (no) 1986-08-14
ZA865784B (en) 1987-03-25

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Inventor name: FEHRENBACH, PAUL LYLE

Inventor name: HOPTON, THOMAS EDWARD