CN1047481A - Pre-sterilized disposable feeding package - Google Patents

Abstract

A kind of disposable container that is suitable for distributing the slotting bottle of conduct usefulness in the bottle, this container comprise container body can shrinking gradually and of said container body top by its annular lip that outwards radially stretches, said container body has and comprises at least one Structural layer and preferably also have an impervious barrier that comprises ethylene-vinyl alcohol copolymer at least.

Description

Pre-sterilized disposable feeding package

The present invention relates to be particularly suitable for being used as the disposable feeding package of eating tube by the disposable Sheng of feeding bottle dispense liquid group food.

Use disposable slotting bottle splendid attire milk or will be widely adopted as everyone knows with the baby bottles of the class I liquid I of the pablum of milk preparation.Use this slotting bottle very favourable because can save like this bottle sterilization with give infant's feeding milk or with relevant many other sex works consuming time of pablum of milk preparation.When using contractibility to insert bottle, its content food of act of sucking sucking-off easily by the baby for example.Use the sterilization be filled with preparation milk or dairy products in advance to insert other occasion that bottle returns travelling and be not easy to prepare food or dairy products convenience is provided.But as known to now, such utensil has some shortcoming.For example, some known slotting bottles need many times on unlatching, insertion and filling food, and can not fully stop oxygen or other dirt to infiltrate by some slotting bottle structure that film is made, so that can not long term storage leak free sterilising food prods.In addition, the elasticity of said slotting bottle.Suit for liquid, but just inapplicable for the food of thickness.The slotting bottle of wall thickness can stop oxygen to infiltrate, but but lacks the required contractibility of dispense liquid.All known this slotting bottle utensil, say it is not good enough for a certain reason economically, be difficult for to make or bad on Combination properties such as rigidity, elasticity and contractibility, and this Combination property to be the sterilization of this pre-filling insert bottle should possess when storing and distribute food or milk.

US Patent 2,885,104 have disclosed a kind of disposable Sheng food tube, it can be removably mounted on distributes in the bottle, and can will be scheduled to the preservation that is separated from each other of the solvent of solution and solute, when needs prepare this solution till.Said Sheng food tube comprises an extensible bag of sleeve shaped, and this bag is made by flexible laminate material.This sleeve is fixed on (referring to Fig. 2 of the document) on the supporting ring with T section and annular lip.

US Patent 3, disclose out a kind of feeding bottle in 075,666, be suitable for by the tube-shaped supporting container of the tight open end of nipple lid comprising having one, with the disposable open containers of a softness, this disposable container top edge part is supported on the container end portion outside face outwards with folding downwards at this.

US Patent 4,706 discloses out in 827 and a kind ofly adopts the rigidity outer sleeve or support container and the feeding bottle of soft endogenous pyrogen.Said endogenous pyrogen can have multiple-structure, comprising a resistance oxygen permeable formation.Said inner bag is fixed reliably by a rigidity plastics disk that is between this bag and the papilla assembly.Said bag, for example utilize heat seal or with the adhesives involution on said disk.

European patent application 0,305 discloses in 146, uses the impervious barrier of the compound of the ethylene-vinyl alcohol copolymer that contains the small amount of amorphous polyamide as the thermoforming laminated vessel.The EVOH composite of this modification can be used in the hot formed multiple-structure and not break, and is also keeping the good character that prevents gas permeation of EVOH simultaneously.

The invention provides out a kind of being suitable in distributing bottle with slotting bottle of disposable container that uses of the sterilization of filling sky or pre-, comprising the container body that can shrink gradually and at said container body top by its rigid annular flange that outwards extends radially, said container body has the wall that comprises a polymer structural layer at least.The present invention also provides a kind of container that comprises the impervious barrier of ethylene-vinyl alcohol copolymer that has at least.

Fig. 1 is a kind of container of the present invention.

Fig. 2 is the part sectional view that shows the part multiple-structure details of a kind of concrete container of the present invention.

Fig. 3 is the cutaway view that is inserted in the container of the present invention in the baby bottles.

The present invention includes a kind of laminated vessel of in feeding bottle for example, using as plug bottle of being suitable for. Fig. 1 represents the side view of a kind of concrete scheme 11 of this container. The container body of said container comprise be essentially preferably tool tapering slightly of columniform wall 13() and device at the bottom of 15 common formation a kind of dais cups. A flange 17 is arranged at the top of said container, around said wall, outwards stretch a short distance. The flange of said container and body are preferably used same material monolithic molding (seeing for details shown in Figure 2), and any known Mechanical Method of the rear usefulness that also can separately be shaped or connect by adhesive is in order to form betwixt the air impermeability involution.

Said container body can be included in the wall and the bottom branch (as shown in Figure 1) that can differentiate separately in varying degrees, but also can comprise a kind of single bag shaped structure and do not have the end that single area separates.The body of said container can shrink under the draft that the effect of for example being sucked by the baby causes gradually.Can easily change degree of shrinkage when needing, so that make said container be suitable for flowing out low viscosity (LV) or heavy body food most.The end of said container body can be the easy engagement face near said container bottom, if said container for example is the bag shape that corner plate is housed then it also can be certain complicated shape.But the body of said container preferably has enough rigidity, and making it can self-supporting when the vertical position of opening.Said container body is within the exterior distributing box.For fear of pollution, preferably be made into jointless integral body.

The flange portion of said container is in said container body upper edge and stretches out a bit of distance from the wall outward radial.Said flange is flat basically and has rigidity, and makes it to be suitable for placing one and close along lug upper surface and cap seal as 19 lids that mark among Fig. 1, so that container top is shut.Said lid can be traditional strippable lid, and this lid can be made with metallic paper, gas-impermeable plastics or metallic paper one plastic layer plywood.Said lid, metal foil-based or the plastic matrix heat sealable that close and that can divest of adhesives heat sealing on said flange that preferred the sort of usefulness is traditional covers, so that can from said flange it be divested the content that the back is taken out container easily.Said lid can have for pulling the little outshot 25 of usefulness, so that help to divest this lid.Before or after said container itself is downcut from the sheet stock embryo of being made by it, said lid can be covered on said flange; Also can be behind the said container of filling with said lid with mechanical means or permanently be bonded on the said flange, condition is that said lid is strippable or can otherwise opens, so that can take out its content.

Preferably the flange with said container is cut into the size that is suitable for being placed in the distributing box, is among the said distributing box to guarantee said container.The typical dispenser that is suitable for holding said container is a baby bottles.Shown in Fig. 3 is the cutaway view that is inserted in the container a kind of of the present invention (having removed detachable lid) in a kind of baby bottles with known configurations.This distributing box itself comprise one hollow, rigidity, be essentially a columniform support container 21 and a dispensing head (for example nipple of making by rubber, plastics or other appropriate materials) 23.Annular flange 17 lower surfaces of said container stride across said cylindrical support container upper end, and upper surface contacts with said dispensing head.The suitable mechanical means (for example threaded hold-doun nut) 20 of said dispensing head, container and the utilization of cylindrical support container are fixed together, and said nut connects by the matching thread that is on the said cylindrical support container.Said mounting structure can distribute content in the said container by said distribution means, for example for the food made from milk of consumption by infants.

Though container of the present invention is specially adapted to baby bottles (seeing above-mentioned), also can be used for various other distributing boxs and distributes various liquid and semi-liquid foodstuff.Said container can be used the slotting bottle of hand-held design drinking container as for example sport, and the slotting bottle of using container for old man or disabled person's feeding, perhaps liquid snack and children and the slotting bottle of beverage-container or the like of being grown up.For these containers, said dispensing head is not palilate usually, but other distribution member that is suitable for of for example managing or chew and so on.Can comprise apple jam, soup class, pablum mud and thin semisolid meat, greengrocery, fruit or the various kinds of foods of other grinding by the present invention with the semi-liquid foodstuff example that suitable distribution apparatus distributes.

Container of the present invention can little by little optionally shrink under the effect of sucking, and said contraction is from the bottom.These characteristics are very important, because (a) when be assigned be liquid foods such as milk the time, the container desired situation bigger with using rigidity compared, can inhale empty said container basically fully and suction air few, (b) when distribute be mud shape pablum etc. than the food of thickness the time, can prevent that (near the top) contraction makes food entrapment at this container far-end at incorrect place because said container begins.A kind of container that begins selectivity contraction gradually in the bottom can be made with the following method: use and soft plastic bag material manufacture different, that have a small amount of rigidity at least, make the end (words that have) portion's wall compare top thin.Can obtain this structure (seeing for details following) with solid phase press molding container (thermoforming) method with the laminated plastics stock that is suitable for.It is found that its wall thickness is that the container of following size suits, at container bottom or the about 50-250 micron of far-end wall thickness, and the about 300-1000 micron of top wall thickness.Preferably making the wall of container of making is thickening progressively from bottom to top, the about 100-150 micron in bottom, the about 400-600 micron in top.When being thermoformed into the container of the about 40-50mm of diameter and dark about 140mm with 1700 microns slab embryos, wall of container thickness is changed gradually without any need for special job operation.

In order to produce commercial available container, this container is preferably impervious basically for oxygen, all gases and dirt.This preferred container is suitable for the F﹠B that long-term (for example 1 year) storage is sterilized under room temperature in the leak free sterilization container, and does not have because the oxygen degradation of fat food causes corruption.The suitable structures material of this container is a kind of laminate structures material, for example the co-extrusion material of the Structural layer of the impervious barrier of at least one layers of polymer and at least one layers of polymer.Said Structural layer plays a part support and protection and has made it certain rigidity this impervious barrier.With reference to Fig. 2, preferably adopt two-layer structure layer 27 and 29, this two Structural layer is in the both sides of said impervious barrier 31.Also can adopt bonding coat 33 and 35.Be suitable for comprising polypropylene, polystyrene, polyester and polyethylene or the like as the poly-mer that Structural layer uses; And can or be lower than hot formed thermoplastic material under this temperature in the thermoforming temperature of said impervious barrier.

Said impervious barrier (preferably existing) is the polymeric material with good barrier (particularly to oxygen).Said impervious barrier preferably accounts for about the 5-50% of said wall of container thickness, and said impervious barrier itself is preferably become to be grouped into the amorphous polyamides that is not more than about 50% by the ethylene-vinyl alcohol copolymer of about 50-100% basically.This impervious barrier has detailed introduction, its content on March 1st, 1989 in disclosed 0,305, No. 146 european patent applications It is for reference to go into this paper.

Said ethylene-vinyl alcohol copolymer contains the ethene of the copolymerization of 20-60 mole % approximately, and at least about 90%(being arranged preferably at least about 95%, preferably at least about 99%) by saponification.This poly-mer can be used the known copolymerization method of ethene and vinyl alcohol, and the method for saponification is prepared then.

Said amorphous polyamides composition is no more than 50% of said impervious barrier weight approximately.In these scopes, obtain good barrier performance.Use is during more than about 50% amorphous polyamides composition, the oxygen barrier properties variation of said compound.For the ease of the thermoforming of said impervious barrier, preferably there is a spot of amorphous polyamides composition at least.The 10-35%(that this polyamide composition preferably accounts for said impervious barrier preferably accounts for 15-30%).Certainly, in said compound, also can comprise a small amount of other material (for example other poly-mer, processing aid, antioxidant, filler and pigment etc.) and not destroy essence of the present invention.

Said amorphous polyamides composition can be a kind of amorphous polyamides, also can be the compound that contains the amorphous polyamides of a certain amount of semi-crystalline state nylon.Amorphous amide-type comprises those amorphous polymers by following diamines preparation: hexamethylenediamine, 2 methyl pentamethylenediamine, 2,2,4-trimethyl hexamethylenediamine, 2,4,4-trimethyl hexamethylenediamine, two (4-aminocyclohexyl) methane, 2, two (4-aminocyclohexyl) the different propane (isopropylidine) of 2-, 1, the 4-DACH, 1, the 3-DACH, m-xylene diamine, 1,5-diamido pentane, 1, the 4-diaminobutane, 1, the 3-diaminopropanes, 2-ethyl diaminobutane, 1,4-diamido methylcyclohexane, the paraxylene diamines, m-phenylene diamine (MPD), m-phenylene diamine (MPD) and p-phenylenediamine (PPD) that p-phenylenediamine (PPD) and alkyl replace.

Operable polyamide example comprises those amorphous polymers by following dicarboxylic acid preparation: isophthalic acid, terephthalic acid, isophthalic acid and terephthalic acid that alkyl replaces, adipic acid, decanedioic acid and succinic acid etc.

By the polyamide of aliphatic diamine and aliphatic diacid preparation, be some traditional semi-crystalline state nylon (also being called the crystalline state nylon) and be not amorphous polyamide.Polyamide by aromatic diamine and aromatic diacid preparation also is a known substances.But in these full aromatics polyamides classes, more known are arranged is unmanageable under common melt processing conditions, so usually and inapplicable.Therefore, preferred amorphous polyamides is more such materials, and wherein two amine moieties or two acid moieties are aromatics, and another part is aliphatic.The aliphatic group of these polyamide is containing 4-8 carbon atom on the chain or in the alicyclic ring system at no more than 15 carbon atoms.The aromatic group of said polyamide the aromatic ring of monocycle or dicyclo is preferably arranged, and these aromatic rings can contain the aliphatic substituent of no more than about 6 carbon atoms.

Yet, be not all will inevitably provide suitable amorphous polyamides in the system of this fragrant fat combination.For example, in general specific m-xylene diamine adipamide just is not suitable for the present invention.This poly-mer is being operated crystallization easily under the required typical heating condition and also crystallization when orientation for thermoforming.This illustrates such fact, and promptly important problem is to determine which kind of concrete polyamide in fact is unbodied, and it not only depends on the chemical constitution of the said polymer.Utilize differential scanning calorimetry can easily accomplish this point.

The instantiation that is applicable to amorphous polyamides of the present invention comprises: benzenedicarboxamide between benzenedicarboxamide, hexamethylenediamine/terephthalamide terpolymer between hexamethylenediamine (wherein isophthalic acid is 100/0～60/40 with the ratio of terephthaldehyde's acid moieties), 2,2,4-and 2,4, compound, hexamethylenediamine and the 2 methyl pentamethylenediamine of 4-trimethyl hexamethylenediamine terephthalamide and the copolymer of isophthalic acid or terephthalic acid or these sour compounds.Based between hexamethylenediamine/terephthalamide and contain the polyamide of high-level terephthaldehyde's acid moieties, also can be used for (condition is to mix second kind of diamines such as 2-methyl diamido pentane) and produce certain machinable amorphous polymer.

Said amorphous polyamides composition can comprise that also (by said polyamide composition) consumption is not higher than the preferably about 20-40% of about 70%() one or more semicrystalline polyamide.When said polyamide compound contains when being higher than about 70% semicrystalline polyamide, said oxygen barrier properties and processing characteristics then can reduce.The semicrystalline polyamide class is traditional semi-crystalline state nylon, and usually by the preparation of lactams or amino acid, for example nylon 6 or nylon 11 are perhaps prepared by two amine condensation reactions such as dibasic acid such as succinic acid, adipic acid or decanedioic acid and hexamethylenediamines.In addition, also comprise the copolymer and the terpolymer of these polyamide, for example the copolymer of hexamethylenediamine-adipic acid and caprolactam (nylon 6,66).Also can use the compound of two or more crystalline state polyamide.Selectivity composition semi-crystalline state nylon should be preferably and the miscible nylon of said EVOH composition, and utilizing to have the mono-glass transition temperature or reduced by the fusing point that differential scanning calorimetry records to prove its compatibility.The example of the semi-crystalline state nylon that is suitable for comprises nylon 6, nylon 66, the copolymer of nylon 6,66 and nylon 6 and nylon 12.No matter polyamide of the present invention is semi-crystalline state or amorphous product, all is to utilize polycondensation reaction preparation known to a person of ordinary skill in the art.

Compound of the present invention can prepare with mixing method well known in the art (comprising list or twin screw melt processing equipment or extruding machine).Mix at (usually under about 200-225 ℃) under the quite high temperature, so that make the homogeneous melt of all compositions.

Be used to prepare each layer between the multi-layered board of container of the present invention, can bond them together with any binder resin.In general, such resin is the thermoplastic polymer with some carbonyls, and said carbonyl is to be derived by the functional group of following material to obtain: the acid amides of free carboxy acid, carboxylate, carboxylate, carboxylic acid, carboxylic acid anhydrides, carbonic ester, poly-urethane rubber and urea etc.In these thermoplastic polymers, carbonyl concentration can change on a large scale, but in general preferably uses such thermoplastic polymer, and wherein the concentration of contained carbonyl is the 10-1400 mM with respect to 100 gram poly-mers.The adhesive resin that is suitable for comprises at least the polyolefin by following a kind of ethylenically unsaturated monomers modification of selecting: unsaturated carboxylic acid and acid anhydride thereof, ester and its acid amides, especially polypropylene, high density polyethylene (HDPE), low density polyethylene (LDPE); Use Ethylene vinyl accetate copolymer: the imines class of acrylic acid, methyl acrylic acid, butenoic acid, fumaric acid, itaconic acid, maleic anhydride, clothing health acid anhydride, citraconic anhydride, ethyl acrylate, methyl methacrylate, ethyl maleate, 2-EHA, acrylamide, Methacrylamide, fatty acid amide and above-mentioned acid by at least a substance modification of selecting in the following material.Said adhesives also can be with ethene polymers with second polymer manufacture (referring to US Patent 4,230,830, it is for reference that this content is listed this paper in) of maleic anhydride grafting.In addition, can also use ethene one acrylate copolymer, ionomer, polyalkylene oxide one polyester block copolymer, carboxymethyl cellulose derivative and these poly-mers and polyolefinic compound as adhesive resin.

Said multilayer board embryo can prepare with co-extrusion or laminating, and condition is that the binding force of interlayer still is enough to keep after thermoforming.Said co-extrusion method (preferably) combines Structural layer, impervious barrier and adhesive phase etc. for several layers under its molten state, all directions that are preferably in said plate all have the thickness distribution of homogeneous.By the described method in this paper other places said plate embryo is done to make container of the present invention after thermoforming and the finishing.

The container of making like this has good barrier properties to oxygen and other nuisance, and is particularly suitable for using as the slotting bottle in the F﹠B distributing box when needs are packed in advance and hoarded food.Certainly, also can utilize single polymer layer (as polyethylene, polypropylene or other soft poly-mer) structural materials forming process, the container of the present invention of the no any impervious barrier of preparation.Such container still has the advantage that selectivity is shunk gradually under suction.The container of even now is unsuitable for long term storage perishable food or beverage, but still can be as the disposable slotting bottle of baby bottles and other this class distributing box.

Embodiment

Prepare slotting bottle shown in the drawings.This inserts bottle multilayer plate thermoforming and deep-draw manufactured.The about 1.5-2mm of this sheet thickness, have: sandwich layer, it is thick to be 0.4mm, contains 65% ethylene-vinyl alcohol copolymer (30Mol% ethene) and 35% unbodied copolyamide, and said amorphous copolyamide is that hexamethylenediamine and isophthalic acid and terephthalic acid are by 70/30 ratio of polymer; Two layers of polypropylene grafting bonding coat (being in said sandwich layer both sides); The two layers of polypropylene skin.Under 150 ℃ of plate temperature, utilize shaping machine (the Hydrotrim Labformer of band die-aid plug ^TM) at about 450KPa(65psig) carry out solid phase pressure forming operation under the pressure, make about 3.2: 1 container of draw ratio.The high about 140mm of this finished container, internal diameter is diminished to the bottom gradually by the top, and about 40mm bottom the about 48mm in top on top leaves not the flange of pressing plate embryo about 4mm that radially extends outwardly all around.This container covers heat sealing with traditional strippable metal laminate after filling dairy products.This container is inserted traditional playtex ^TMAmong the baby bottles, divest said peelable lid, assemble said feeding bottle by shown in Figure 3.Under baby's the effect of sucking or other effect, during by the said dairy products of nipple sucking-off, this container begins to shrink gradually from far-end, therefore can be basically the said dairy products of sucking-off and aspirated air not basically fully.

Claims (18)

1, a kind of being suitable for use as distributed the disposable container of inserting bottle in the bottle, a rigid annular shaped flange that comprises the container body that can shrink gradually and outwards radially stretch at said container body top, said container body has the wall that comprises a polymer structural layer at least.

2, the container of claim 1, wherein said wall are the thickest near said flange place, and the said flange of distance is thin more more at a distance, can preferentially shrink apart from this flange wall at a distance like this.

3, the container of claim 2, wherein said wall also comprises at least one impervious barrier.

4, the container of claim 3, wherein said impervious barrier comprises a kind of ethylene-vinyl alcohol copolymer.

5, the container of claim 4, wherein said impervious barrier comprise the ethylene-vinyl alcohol copolymer that (a) about 50-100% wherein contains the 20-60 mole % copolymerization of ethylene of having an appointment, and said copolymer saponification degree is at least about 95%; And (b) not being higher than about 50% amorphous polyamides composition, said amorphous polyamides composition is made up of the semicrystalline polyamide of a kind of machinable amorphous polyamides and 0-about 70% basically by its weight.

6, the container of claim 5, wherein said impervious barrier comprise the ethylene-vinyl alcohol copolymer of about 60-95% and the amorphous polyamides composition of about 5-40%.

7, wherein there are two Structural layers at least in the container of claim 3, be in the both sides of said impervious barrier, and said Structural layer is a polyolefin resin layer.

8, the container of claim 7, wherein said polyolefin is a polypropylene.

9, the container of claim 6, wherein said impervious barrier accounts for the 5-50% of said wall gross thickness greatly.

10, the container of claim 3, wherein said wall also comprises at least one adhesive phase.

11, the container of claim 2, wherein the flange of said container and wall are integrally formed with same material, and said container body is the solid phase press molding, the gross thickness of said wall is about the 50-700 micron.

12, the container of claim 2 also comprises the flange involution, an openable air impermeability lid that strides across said container.

13, a kind of distributing box, comprise a support container that cylindrical basically rigidity is hollow, be supported in one in the said support container disposable Sheng food tube that shrinks gradually that can take out, said Sheng food tube comprises an annular rigid flanges and a collapsible container body, said container body has the wall that comprises a Structural layer at least and thick more and far away more thin more from said flange the closer to said flange, and a dispensing head that communicates with said Sheng food tube inside, so that can distribute its content.

14, the distributing box of claim 13, wherein said wall also comprises an impervious barrier, this layer comprises the ethylene-vinyl alcohol copolymer of the 20-60 mole % copolymerization of ethylene of having an appointment wherein containing of (a) about 50-100%, said copolymer saponification degree is at least about 95% and (b) be not higher than the amorphous polyamides composition of about 50 weight %.

15, the distributing box of claim 13, wherein said impervious barrier comprise the ethylene-vinyl alcohol copolymer of about 60-95% and the amorphous polyamides composition of about 5-40%.

16, the distributing box of claim 16, the flange and the container body of wherein said Sheng food tube are integrally formed with same material, and said container body solid phase press molding, the about 50-700 micron of said wall gross thickness.

17, the distributing box of claim 13, wherein said dispensing head is a nipple.

18, the distributing box of claim 17, the annular lip support of wherein said Sheng food tube are in the top of said support container, and said nipple is supported on the annular lip of said Sheng food tube; Said distributing box also comprises a hold-doun nut that cooperates with said support container upper end, avoids that content spills in the said distributing box.

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