CN1275766C - A packaging laminate for a retortable packaging container - Google Patents

A packaging laminate for a retortable packaging container Download PDF

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Publication number
CN1275766C
CN1275766C CNB028095766A CN02809576A CN1275766C CN 1275766 C CN1275766 C CN 1275766C CN B028095766 A CNB028095766 A CN B028095766A CN 02809576 A CN02809576 A CN 02809576A CN 1275766 C CN1275766 C CN 1275766C
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CN
China
Prior art keywords
paper
packaging laminate
alkyl ketene
ply
ketene dimer
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.)
Expired - Fee Related
Application number
CNB028095766A
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Chinese (zh)
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CN1507405A (en
Inventor
L·西克尔特
P·弗洛贝里
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.)
Tetra Laval Holdings and Finance SA
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Tetra Laval Holdings and Finance SA
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Publication of CN1507405A publication Critical patent/CN1507405A/en
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Publication of CN1275766C publication Critical patent/CN1275766C/en
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Classifications

    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • 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
    • B32B3/04—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 characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • 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
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2307/73—Hydrophobic
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/043—HDPE, i.e. high density polyethylene
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • B32B2439/70—Food packaging
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/17—Ketenes, e.g. ketene dimers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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.]
    • Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]

Landscapes

  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Cartons (AREA)

Abstract

A packaging laminate for a retortable packaging container of the type which is produced by fold forming and thermosealing of a web or a prefabricated blank of the packaging laminate. The packaging laminate (10) includes a base layer (11) of paper or paperboard which has been rendered hydrophobic by stock sizing. The base layer (11) is preferably rendered hydrophobic by stock sizing by means of an aqueous dispersion or emulsion of an alkyl ketene dimer or mixture of alkyl ketene dimers with a different number of carbon atoms in their respective fat tails. Most preferably, the base layer (11) is rendered hydrophobic by stock sizing by means of an aqueous dispersion or emulsion of an alkyl ketene dimer containing 18 carbon atoms in its fat tail. The quantity of alkyl ketene dimers is suitably at least approx. 0.25 weight %, preferably 0.25 - 0.4 weight %, most preferably approx. 0.4 weight %, calculated on the dry weight of the base layer (11).

Description

The packaging laminate that is used for retortable packing container reaches by its retortable packing container of making
Technical field
The present invention relates to a kind of packaging laminate that is used for retortable packing container, this lamination comprises paper or cardboard basic unit.
Background technology
Publication number is the packaging laminate that the international patent application of WO97/02140 discloses the above-mentioned type.The packaging laminate of prior art has rigidity but folding paper or cardboard basic unit or sandwich layer and at the liquid-tight heat resistant plastice skin of basic unit both sides.Between the skin of one of basic unit and two plastic outer layers, also can provide gas barrier layer, for example aluminium foil, thereby also give the performance that the anti-gas of packaging laminate, particularly anti-oxygen see through.
International Patent Application WO 97/02181 and WO98/18680 have also described similar packaging laminate.
Utilize modern packaging machine and charger to make final packing container by the prior art packaging laminate, volume, the preform of this type of machinery utilization packaging laminate forms, fills and seal final packing.For example, be to utilize blank to make packing container like this: at first blank is formed the tubular container capsule, wherein the longitudinal edge of blank all is folded in half, and by in the heat-sealing that is called overlapping joint it for good and all being bonded with each other together, this is bonded on continuity always between two openends of tubular container capsule.Afterwards by making the adjacent bottom plates folding and forming and the heat-sealing of container capsule, thereby one at an end giving the container capsule is the end cap (bottom surface) on plane basically.The container capsule of the end sealing (having the bottom) that will obtain thus by another openend is filled needed thing such as food, after the filling, by the respective end plates of the container capsule after filling is carried out last folding and forming and heat-sealing, thus give one of described openend similar be the end cap (end face) on plane basically.
Know already through heat treated food to prolong its pot-life that this is because heat treatment fully makes the bacterium, fungi and other the unwanted microorganism that are present in the food be eliminated, neutralize or reduce.In order to obtain bactericidal effect completely, must heat-treat under the following conditions: all parts of processed food are heated to that the microorganism of guaranteeing in the food is utterly destroyed or inactivation and required high temperature level and heat its required time span.
Usually the heat treatment that prolongs the packaged food pot-life in a distiller, this distiller is the instrument that comprises the closed processes chamber, can regulate and control the temperature and pressure in the process chamber in heat treatment process.Preferred this heat treatment or distillation can be cited as under mode that the International Patent Application WO 98/16431 of reference described in detail and the condition at this paper to be carried out.Packing container after filling is placed in the processing space of distiller, thereafter, make the gas heat medium, contact with the outer wall of packing container such as hot water and steam is mobile, the food that is wrapped is heated to predetermined treatment temperature, this temperature is usually between 70-130 ℃.The food that is wrapped is kept the predetermined sufficiently long time under this temperature, to guarantee to being present in the microorganism heat damage as far as possible fully in the food.Subsequently, utilize cooling agent, such as cold water with processed food drop near or be slightly higher than environment temperature, be 25-30 ℃ temperature, then stop to handle, by taking out packing container in the distiller.
Need multi-form processing in order to obtain aseptic completely, different food by the heat treatment in the distiller.For some food, need stronger heat treatment, promptly only need short duration and relatively low temperature can obtain to expect that other food of aseptic result compares with those, need higher treatment temperature and/or longer processing time.
The packing container of being made by above-mentioned known package lamination has enough mechanical strengths usually, and can stand gentle relatively or not too violent heat treatment, but, on the other hand, if when needs guaranteed that some plants the thoroughly all aseptic relatively-high temperature degree of based food and/or long process was heat-treated under the time relatively, the packing container of prior art tended to occur damaging or destroying even become and thoroughly can not use sometimes.
A usually detectable extremely violent therewith relevant problem of heat treatment is, liquid or moisture tend to enter in some zones of the paper of packing container or ply of board, and this zone is meant that the notching edge of paper or ply of board is easy to be exposed to the zone of gas heat medium, for example vapours more or less.Packing container is the notching edge that freely exposes that always extends between the end face of packing container and the bottom surface along being to this responsive especially regional example of moisture and heat at the two ends of tubular container capsule.Under the situation of especially severe, the infiltration of moisture and liquid can make package wall expand and layering, thereby becomes not attractive in appearance or thoroughly can not be used for further processing.
As described in International Patent Application WO 98/18680; in the past when the problem of the notching edge of attempting to solve above-mentioned suction moisture and liquid, their starting point is to utilize chemical method by injecting water-repellent substance or utilizing Mechanical Method by cutting with fold and protect or cover these edges.Though these two kinds of art methods have solved the intrinsic problem of moisture and liquid infiltration, in the packaging laminate production process, they need at least one extra operation and relative optional equipment.
Therefore, an object of the present invention is to solve the shortcoming relevant with above-mentioned prior art.
Another object of the present invention provides the packaging laminate that packing container is used, even heat treatment is to carry out in distiller with high-temperature and/or long process time, this packing container also reliably ground warp be subjected to heat treatment in the distiller, and do not have the ruined danger that the infiltration because of moisture and liquid causes.
Can realize the purpose of these and other according to the present invention, wherein the packaging laminate of describing by brief introduction has been invested feature as claimed in claim 1.
Favourable and the convenient embodiment of packaging laminate of the present invention further has the described feature of dependent claims.
Summary of the invention
Thereby, the invention provides the packaging laminate that retortable packing container is used, this packing container comprises paper or ply of board, this layer becomes hydrophobic by sizing material gluing (stock sizing).
Because sizing material becomes hydrophobic paper or ply of board has enough moistures and liquid impermeability energy by scribbling in beginning, so hydrophobic paper or ply of board in the packaging laminate of the present invention do not need extra chemistry and mechanical means to protect the notching edge that is exposed.Therefore, can utilize existing conversion equipment to produce packaging laminate of the present invention, need not in the production process of packaging laminate, to use extra operating procedure and relevant therewith extras with simple method.
According to the present invention, in the aqueous solution, disperse or the alkyl ketene dimer of emulsification carries out the sizing material gluing and prepares hydrophobic paper or ply of board by utilizing.In practical embodiments, this aqueous dispersion or emulsion contain the alkyl ketene dimer that its fatty tail end has 16-22 carbon atom.
In the present invention's one particularly preferred embodiment, packaging laminate comprises paper or ply of board, and this paper or ply of board have utilized the aqueous dispersion of alkyl ketene dimer of the fatty tail end with 18 carbon atoms or emulsion and become hydrophobic.Aqueous dispersion or emulsion with alkyl ketene dimer of 18 carbon atoms may make that not only alkyl ketene dimer has higher absorbability in paper pulp, thereby in paper of being produced or ply of board mesopore closure good (hydrophobic), and, do not stop the operation subsequently of paper pulp in the paper making equipment and processing can realize needed high the absorption.
Paper or ply of board in the preferred packaging laminate of the present invention comprise alkyl ketene dimer, and its amount accounts for more than about 0.25 weight % with paper or ply of board dry weight basis.In other words, the quantity of preferred alkyl ketene dimers should be greater than 2.5kg in paper per ton or the cardboard, but should not surpass about 4kg, and this is that food product environment allows the maximum used.
The accompanying drawing summary
Describe the present invention with reference to the following drawings in detail, wherein:
Fig. 1 is the cross sectional representation of the simplest embodiment packaging laminate of the present invention.
Figure 2 shows that the packaging laminate of a preferred practical embodiment of the present invention.
Preferred implementation describes in detail
Fig. 1 is the cross sectional representation of the simplest embodiment packaging laminate of the present invention.Reference numeral 10 represented packaging laminates comprise the impenetrable liquid outer 12 and 13 of the heat sealable plastics of the basis of paper or cardboard or sandwich layer 11 and basic unit 11 both sides.
By utilizing alkyl ketene dimer or having nothing in common with each other and the aqueous dispersion of the mixture of the preferred alkyl ketene dimer of carbon number between 16-22 or emulsion carry out the sizing material gluing and makes that basic unit 11 is hydrophobic at its corresponding fatty tail end carbon number.In a particularly preferred embodiment, make that at aqueous dispersion or the emulsion that its fatty tail end has the alkyl ketene dimer of 18 carbon atoms basic unit 11 is hydrophobic by utilization.
The amount of alkyl ketene dimer can change in the basic unit 11, but is preferably at least about 0.25 weight % with basic unit's dry weight basis.Yet when packaging laminate 10 of the present invention was desired to be used for the situation relevant with food, the amount of alkyl ketene dimer should not surpass with 11 dry weight basis, the 0.4 weight % of basic unit.In other words, the amount of paper per ton or cardboard preferred alkyl ketene dimers is 2.5-4kg in the butt layer 11.
Two liquid-tight plastic outer layers 12 and 13 material are preferably heat sealable plastics, to help the final retortable packing container of reasonable production.Two impenetrable liquid outer 12 and 13 these type of used examples that seal plastics include but not limited to polyethylene (PE), polypropylene (PP), polyester (PET) and copolymer thereof.The example of the vinyon that is suitable for can be high density polyethylene (HDPE) (HDPE) or low density linear polyethylene (LLDPE), and the example of the polyester plastics that is suitable for can be amorphous polyester (APET).
Figure 2 shows that the cross section of the packaging laminate of a preferred embodiment of the invention.Reference numeral 20 represented packaging laminates have the basic unit 21 of paper or cardboard and the impenetrable liquid outer 22 and 23 of basic unit 21 both sides.
Between the layer 22 of one of basic unit 21 and two impenetrable liquid skins, packaging laminate 20 also has gas barrier layer 24.
Between impenetrable liquid layer 22 and gas barrier layer 24, have adhesive linkage 25, impenetrable liquid layer 22 can be bonded on the gas barrier layer 24 by this adhesive linkage.
Laminating agent or sealant layer 26 are arranged between gas barrier layer 24 and basic unit 21, the intrinsic property of this laminating agent or sealant can make the bonding enough strong and adhesive strength between gas barrier layer 24 and the sandwich layer 21 enough stablize, so that be exposed to excessive temperature stress, during promptly up to about 130 ℃ or higher temperature, can not weaken or thoroughly lose bonding force when packaging laminate 20.
The ornamental former Figure 27 that can have suitable printing-ink at the impenetrable liquid skin 23 of basic unit's 21 opposite sides; itself is protected by hyaline layer 28; this hyaline layer imposes on ornamental former Figure 27, and is made up of suitable lacquer or other reagent, is not subjected to the outside to invade damage to protect ornamental former Figure 27.
In order to make packaging laminate 20 have better integrality, between gas barrier layer 24 and laminating agent or sealant layer 26, adhesive linkage 29 is set, by this adhesive linkage gas barrier layer 24 and laminating agent or sealant layer 26 are bonded together.
By utilizing alkyl ketene dimer or having nothing in common with each other and the aqueous dispersion of the mixture of the preferred alkyl ketene dimer of carbon number between 16-22 or emulsion carry out the sizing material gluing and makes that basic unit 21 is hydrophobic at its corresponding fatty tail end carbon number.In a particularly preferred embodiment, make that at aqueous dispersion or the emulsion that its fatty tail end has the alkyl ketene dimer of 18 carbon atoms basic unit 21 is hydrophobic by utilization.
The amount of alkyl ketene dimer can change in the basic unit 21, but is preferably at least about 0.25 weight % with the dry weight basis of basic unit 21.Yet when packaging laminate 20 of the present invention was desired to be used for the situation relevant with food, the amount of alkyl ketene dimer should not surpass about 0.4 weight % with the dry weight basis of basic unit 21.In other words, the amount of paper per ton or cardboard preferred alkyl ketene dimers is 2.5-4kg in the butt layer 21.
Impenetrable liquid skin 23 can be the plastics that are selected from the group that consists essentially of polyethylene (PE), polypropylene (PP) and polyester (PET) or its mixture.The example of the vinyon that is suitable for can be high density polyethylene (HDPE) (HDPE) or low density linear polyethylene (LLDPE), the example of the polypropylene plastics that is suitable for can be the polypropylene (OPP) of orientation, and the example of available polyester plastics can be amorphous polyester (APET).
Preferred impenetrable liquid skin 23 is made up of the physics or the mechanical impurity of polyethylene (PE) and polypropylene (PP), this mixture is except having good impenetrable liquid, also have sufficient protection against the tide and thermal protective performance, high humidity and high temperature stress when in distiller, carrying out the normal heat processing afford to stand in order to prolong the pot-life.And, the skin 23 that the physics of polyethylene (PE) and polypropylene (PP) or mechanical impurity are made not only has good impressionability, and when packaging laminate 20 is shaped to distillable packing container, can make the impenetrable liquid sealing property of tool mechanical strength become possibility by the what is called heat-sealing.
Impenetrable liquid skin 22 can be made up of the plastics that are selected from the group that consists essentially of polyethylene (PE), polypropylene (PP), polyester (PET) and copolymer thereof equally.The example of the vinyon that is suitable for can be high density polyethylene (HDPE) (HDPE) or low density linear polyethylene (LLDPE), and the example of available polyester plastics is amorphous polyester (APET).
Preferred impenetrable liquid skin 22 is made up of polyethylene and polyacrylic copolymer, and protection against the tide that this copolymer had and thermal protective performance are enough to afford to stand high humidity and the high temperature stress when carrying out the normal heat processing in order to prolong the pot-life in distiller.And when packaging laminate 20 was shaped to distillable packing container, polyethylene and polyacrylic copolymer layer helped the impenetrable liquid sealing of mechanical strength.
Layer 24 as gas barrier layer can be made up of inorganic or organic material.The example of available inorganic material can be for example aluminium foil or by the plasma-deposited silicon oxide layer that obtains, the example of suitable organic material can be so-called barrier polymer of metal forming, for example copolymer of ethene and vinyl alcohol (EVOH).
Preferred gas barrier layer 24 is aluminium foils, and it not only has the performance that good anti-gas, particularly oxygen see through, and help by seal this simply fast and effectively Sealing Technology pack lamination 20.
Can packaging laminate of the present invention be manufactured the good retortable packing container of function by folding and forming and heat-sealing in the above described manner, can under high humidity and very high temperature condition, in distiller, carry out reliable heat treatment to this packing container, simultaneously packaging laminate can layering, because stoped moisture and steam to enter the basic unit of hydrophobic treatment by the notching edge that exposes effectively.

Claims (5)

1. the packaging laminate that is used for retortable packing container, such packing container are by the sheet of packaging laminate or volume parison material folding forming and sealing are made described packaging laminate (10; 20) comprise the basic unit (11 of paper or cardboard; 21) and plastic layer (11; 21) the impenetrable liquid skin (12,13 made of the heat sealable plastics of both sides; 22,23), it is characterized in that: the water slurry of the mixture by utilizing alkyl ketene dimer or alkyl ketene dimer or emulsion carry out so-called sizing material gluing makes paper or cardboard hydrophobic, wherein said dimer has 18 carbon atoms at its fatty tail end, based on the dry weight basis of described paper, its consumption is every 1000kg paper 2.5kg-4kg alkyl ketene dimer.
2. the packaging laminate of claim 1 is characterized in that: paper or ply of board (11; 21) contain the amount of described alkyl ketene dimer with paper or ply of board (11; 21) dry weight is counted at least 0.25 weight %.
3. claim 1 or 2 packaging laminate is characterized in that: paper or ply of board (11; 21) amount that contains alkyl ketene dimer is dried paper per ton or ply of board (11; This dimer that 2.5-4kg is arranged in paper 21) or the cardboard.
4. through the paper or the ply of board (11 of hydrophobic treatment; 21) at the packaging laminate (10 of one of above-mentioned any claim; 20) in as the purposes of basic unit.
5. retortable packing container that constitutes as the packaging laminate of one of claim 1-3.
CNB028095766A 2001-05-10 2002-05-07 A packaging laminate for a retortable packaging container Expired - Fee Related CN1275766C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE01016732 2001-05-10
SE0101673A SE0101673L (en) 2001-05-10 2001-05-10 Packaging laminate for an autoclavable packaging container

Publications (2)

Publication Number Publication Date
CN1507405A CN1507405A (en) 2004-06-23
CN1275766C true CN1275766C (en) 2006-09-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNB028095766A Expired - Fee Related CN1275766C (en) 2001-05-10 2002-05-07 A packaging laminate for a retortable packaging container

Country Status (10)

Country Link
US (1) US20040170781A1 (en)
EP (1) EP1401726A1 (en)
JP (1) JP2005508800A (en)
CN (1) CN1275766C (en)
AU (1) AU2002306037B2 (en)
CA (1) CA2446548A1 (en)
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RU2289535C2 (en) 2006-12-20
SE0101673D0 (en) 2001-05-10
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JP2005508800A (en) 2005-04-07
AU2002306037B2 (en) 2007-06-14
SE0101673L (en) 2002-11-11
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EP1401726A1 (en) 2004-03-31
RU2003135793A (en) 2005-02-27

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