WO2017112977A9

WO2017112977A9 - Packaging system with plastic container for filling product and method for manufacturing thereof

Info

Publication number: WO2017112977A9
Application number: PCT/BE2016/000055
Authority: WO
Inventors: Dirk De Cuyper; William Dierickx; Tom Anthierens
Original assignee: Tradidec Nv
Current assignee: Tradidec Nv
Priority date: 2015-12-28
Filing date: 2016-12-28
Publication date: 2017-09-21
Anticipated expiration: 2018-06-28
Also published as: WO2017112977A2; WO2017112977A3

Abstract

Container system for packaging under pressure, a continuous filling product, (semi-)liquid fluids or of the type foams, pastes or powders, comprising a container (1) which is made of plastic polymer and is provided with a neck part (23) with a pouring opening (24), a cylindrical casing part (22) which is cut off at its opposite side, and a base part. The container can be closed on said top side via a closure (5), and is exposed for an internal pressure > atmospheric pressure. This is remarkable in that said casing part (22) on its base side is cut away and is closed by a separately added base part (21) made of plastic polymer, which is attached to the casing (22) via a connection (13), and in that this is provided with a movable piston (5, 6) which is axially displaceable along the main axis of the pressurised container between a bottom and a top position (A, B). Method for manufacturing thereof.

Description

Packaging system with plastic container for filling product and

method for manufacturing thereof

Field of the Invention

The present invention relates to a container of plastic material which is intended to receive a filling product, such as fluids, in particular under pressure, namely liquids or gases or also semi-liquid products, in particular viscous products such as pastes, creams, gels, also powders, bulk product etc.

Background of the invention Complex pressurised packaging systems are known which comprise, namely following a double container construction of bottle-in-bottle, firstly a high- pressure container and secondly a low-pressure container which contains the filling product itself, between which a separating element is arranged. The two containers are separated by a pressure regulator which converts a high pressure into a low pressure which is constant. This pressurised packaging system offers the advantage that this special pressure control system allows the product contained therein, i.e. the filling product, to be dispensed under constant parameters of pressure and speed, wherein especially all part containers thereof - i.e. both the high-pressure container and the low-pressure container - may be made of norma! polyethylene terephthalate, even as standard PET,

Such a pressure control system is usually composed of a large number of parts so that the system is extremeiy complex, with the result that this packaging system represents a high production cost. A quite efficient pressurised container packaging system functions as a plastic pressurised packaging using compressed air, instead of the classic metal pressurised packaging using propellant gas, Such a packaging thus consists of two containers, an inner container with high-pressure compressed air, and an outer container with low- pressure compressed air. The outer container fully surrounds the inner container, and these are separated from each other by a pressure regulator which converts the high pressure into a constant low pressure. The low-pressure part contains the product with a piston below it. n both the i er and the outer container, the ase is cut of and a se arate base part is fitted. This base part contains a centre! opening closed by rubber plug. After filling, t e high-pressure rn air is Introduced into the inmr container via this plug. W n tie product of the pressurised container packaging s stem is used, the piston moves up under the influence of the low- res ure air aoo^* in so doing, expels the product from the outer container.

As a variant, the same pressurised container packaging system is provided but without the closed low-pressure part. Hem, the high-pressure compressed air is introduced directly below the piston via the same opening in the same separate base past

Mm of the Invention

The object of the present invention is to remedy this disadvantage by proposing a simplified pressurised packaging system. This m consist of a system comprising a similar outer container provided with a separate base part, bu win the exclusion of the pressure control system , The omission of said pressure regulator has the result that both the illi g product contained in the pressurised packaging system, end the outer container, are directly subjected to tie high pressure which thus st remains applicable .

This means that every time the pressurised packaging system is activated_* the pressure therein gradually diminishes as the filling product is consumed under pressure, and in this way expelled torn the container, in other words, under these circumstances the fillin product is consequently net dispensed under a constant pressure. in addition, the oute container Is exposed to the high pressure so that accordingly this must necessarty be reinforced, since this is made of a plastic material. o summarise, the object is to simplify a ver complex system, wherein tie complexity is aWbutabie primarily to the pressure regulator. By eliminating the pressure regulator from this system, the eontalnef is then also exposed to the high pressure, so i to a certain extent the container must be reinforced in order to be able to resist the high pressure and temperature. In ether words_* the aim is a simplification of the system, which is beneflciai from an economic aspect since a cheaper alternative Is proposed here for the pressurised container system, which is achieved by acting on the choice of plastic material from which th pressurised container is made. ummary of the Invention Therafom according to ! © invention, a pressurised eo talf system is proposed for packaging a continuous filling product under pressure, wherein this com ises a container which Is pr vided with a neck part wfth a ur ng ening o its to side, adjoini g this a sheathing part, In particular with a cylindrical shape, which forms h foody of the container, and a ba e part which in parts uiar consists of a plastic other, The container can fee closed on said top side via a cteswe. The container is submitted to m internal pressure which is higher than atmospheric pressure, The pressurised container s slem is remarkable In that said s at i g par s out a a on its opposite ase side, wherein the base side opposite said top skJe is closed fey a separatel added base part also m d of plastic olymer, which is attached to the sheathing by m ans of a connexion, and in that this is provided with a movable piston which is axlaily dlspia eablo along the main axis of the pressurised container between a bottom and a top position, in particular, the container is made of a plastic material which is biaxiaH sireichafele. In another emtxjdlrnent of the pressurised container system according to the Invention, the piston may be mounted at the top of the container instead of at the bottom, wherein the pisto daring iiling is systematically pressed down, so that fewer air inclusions occur. This offers the advantage that even highly viscous products can foe filled with a high speed.

Accordtog to a particular embodiment of the pmssun^'sed container system according to the invention, the piston Is a bidirectional piston. The piston is displ&ceabie in a reciproeatir^ fashion along the main a s be wee said bottom and top positions. According to a more particular embodmen of the pressurised container system accor ing to the invention, the piston has an arched form which protrudes towards the top of # container, which Is such thai in this way almost all th filflno; prodwc can fee expelled from the pressurised container system during operation. Here, the piston has a shape mafch¾¾g that of the upper bottle In which this fits precisely in Its top position, wherein almost no residual space is left in-beh^een. Thus the piston Is designed to have a form which oorreep nd well to the shoulder of the top of the container, ao that this moves all the product from the container, instead of a flat disc. The r & e of such a piston Is that ail f e prodpct is expe8ed₍ so the oontainer can fee emp¾ed more easily_* According to a further embodiment of the pressurised container system according to the invention, a closable valve is provided in said separately added base part for pressurisation thereof, in particular a self- closable element, particularly a high-pressure valve of the so-called "umbrella plug" type, or via a two-stage element, particularly a so- cafied two-stage "Nicholson plug".

According to yet a further embodiment of the pressurised container system according to the invention, the materials used in the container comprise a biaxially stretchable plastic material with high intrinsic viscosity.

According to a preferred embodiment, the container is made from polyesters, namely PET (polyethylene terephthalate), or PET co polyesters with high pressure resistance. Preferred embodiments of these co polyesters are naphthalate, isosorbide or copolyesters containing spiroglycol. These copolyesters typically have a higher pressure resistance, a higher temperature resistance or a combination of both, than PET.

According to a possible embodiment of the pressurised container system according to the invention, the container may where applicable also be made of a po!yamide, polystyrene and COC.

According to yet a further embodiment of the invention, a biaxially stretchable material is selected which has a high intrinsic viscosity of an order of magnitude of 0,7 to 1 ,2 g/dl, in particular 0,8 to 1 g/dl.

According to another embodiment of the invention, a homopolymer-type PET material is chosen which is characterised by a behaviour with fast crystallisation. This also produces a stronger container with better resistance to both temperature and pressure.

According to an alternative embodiment of the invention, a hot-fiil PET material is selected, since this type of material was also specially developed to crystallise more quickly, which promotes temperature stability compared with standard PET. According to a variant embodiment of the latter, a particular blow-moulding step is applied consisting of a so-called heat set blow-moulding process, whereby said accelerated crystallisation effect of the latter material, hot-fill PET, is further amplified. Here preforms are blow-moulded in preheated moulds instead of in cooled moulds. This also leads to higher crystallisation, whereby again both temperature- and pressure- stability are further increased.

According to a preferred embodiment of the invention, the blow moulds are heated to temperatures of at least 120°C, up to 220°C, whereby the crystallisation acceleration of hot-fill PET is brought to unprecedented levels.

According to yet a further embodiment of the invention, the basic plastic material PET is at least partially replaced by PEN, with a PEN proportion of approximately 5 w.% and 95% PET, or 95 w.% EN and 5% PET. PEN has the property that firstly this material is stronger than PET, and secondly it has a higher vitrification temperature T_g. The PEN material proposed here consequently perfectly suits the proposed application of a simplified pressurised packaging system which must resist higher pressure conditions. The assembly is made more stable for high pressure and temperature combinations.

According to yet a further embodiment of the system according to the invention, additives are added to the base material, namely standard PET, consisting of so-called crystal!isers. These are formed by seeds or constituents which significantly increase the crystallisation degree of a material in which they are contained. Thanks to the addition of such crystal I isers, it is even possible to use normal, standard PET as the basic plastic material, instead of the abovementioned materials. In this case, it is the crystallisers which ensure a higher crystallisation level, increasing the temperature- and pressure- stability. In some cases however, crystal lisers may also be added to one of the said high-quality plastic materials proposed according to this invention, always to promote further the acceleration of the crystallisation effect to high levels.

According to a particular embodiment of the invention, said crystailtsers are formed by nudeators consisting of inorganic nucleators, such as in particular talcum, wherein nucleation is defined as the first step of crystallisation, and the substances which are added are nucleators, wherein the end result is a crystallised plastic.

According to an alternative embodiment thereof, said crystallisers are formed by seeds or nucleators consisting of organic salts, e.g. carboxyl salts such as stearates.

As well as chemical reinforcement which acts rather on the composition of the container to solve the problem of the necessar strength, there is also the possibility of other forms of reinforcement, such as in particular a double container. Thus a significant embodiment of the pressurised container system according to the invention comprises at least one inner container which is fully enclosed in the container, in particular wherein the inner container is primarily intended to receive the filling product therein.

More particularly, this pressurised container system is attached to the base thereof, formtng a double container system in which the inner container is also supported by the main container. According to a preferred embodiment of the pressurised container system, said double container system is such that a double wall is produced therein, forming an air layer in- between, in particular thermally as an insulation layer for the heat.

According to another advantageous embodiment of the pressurised container system according to the invention, said inner container is made of another plastic material, in particular PET for the outer container and PP for the inner container, or also for example PE. The benefit of the double container arises from the fact that particular properties are plastic-dependent, given that a specific plastic is not necessarily both strong and chemically resistant. Thus reinforced PET is very strong against pressure and temperature but not resistant to specific chemicals.

The present invention also relates to a method for production of a preform or container as specified in more detail below, namely of the type of a pressurised container packaging, wherein firstly a container casing profile with a longitudinal axis is formed, which is then cut to the desired length into an elongate element, wherein the production process of the pressurised container is as follows:

- in a first step AA, a preform is produced as a semi-finished product by injection moulding, wherein grains of plastic are dried, melted in a device and then driven into an injection mould;

- in a following step BB, said semi-finished product is blown in a blow mould into a bottle form, in particular tubular, as an secondary intermediate product;

- in an step CC which always follows, the underside of said secondary intermediate product is cut to a specific length, wherein a separately added injection-moulded base is then included in said secondary intermediate product.

According to a particular embodiment of the method according to the invention, the filling is introduced with the piston at the top and the piston is driven downward and then pressurised. According to a more particular embodiment of t e rne sod ccor ing to the inw& m, said connection is roduced by means of gluif¾§, folding or w lding, in particular by laser welding, nduction welding or uitmsorsio weiding,

Furt e more, acco di g to the invention a met od is proposed for roducton of plastic hollow of¾eet$ by injection moyidi g, wherein primary raw material is injected into a mould with a core side and a cavity side, betwee which hollow ej ct are formed, whereupon the me¾1d is opened into Ms two halves, of which the cores each carry a hoiSow object, whic is distinguished in that as holiow objects, composite preforms are made which consist of part forms and which are intended to be processed into plastic containers, wherein secondary raw material for production of a secondary preform, added to each preform, is jected into trse injection niouid which is equipped with multiple cavities and has a even number of cavities or cores, and both part forms are moulded simultaneously, wherein furthermore the steps are peiformed for making these by over- moulding.

According to specific embodiment, the inner and outer containers are bfow~rnouided from one and the same preform. He e* t is preform is produced using th known technique of over-moulding, wherein the preform consists of two layers, an inner layer and an outer layer, which may consist of two different materials, In a further embodiment, there is no adhesion between the two said layers, whereby after biow-mouding a separate inner and an outer container are formed, Further features and characteristics of the invention are defined in the other subclaims.

Further details are explained below in individual exemplary embodiments of the invention, with reference to the attached drawings, Herein, the same reference numerals miate to the same or similar elements.

Brief Asc ptio of the D a ings ig, 1 shows a front view of an embodiment of a container according to the invention with variants in different views.

ig. 2 shows a loo jtudinal view of this first embodiment of the container according to the invention, in cross-section alo g line Ά-Α in Fig, 3, Fig, 3 s ows a bottom view of the embodiment of the container according to the nvention shown in Fig> 1.

Fig. 4 shows a similar longitudinal view to Fig. 2, but of trie mbodime t of the container according to t e invention presented in the preceding Figures, viewed in cross-section along tine 8»B of the respective Fig . §.

Fig. S shows a bottom view of the container according to the invention represented in Fig. 1 , but in a different embodiment thereof

F¾. 8 and following Figures show diagrammatic representations of respective emb dime ts of the eform according to the Invention, in artioi iar e cross-secticn thereof.

Fig, ? shows a view simitar to Fig. 1 but of a furttier embodiment of the container according to the Invention.

Fig, β shows a view of an embodiment of a usual pressurised container packaging system with a standard piston at the top and pressu e regulator.

Fig. 9 shows a view of a further embodiment of a usual pressu ise container packaging system with a fiat disc as a piston at the top, and also with a pressure regulator.

Fig. 10 shows a view of yet a further embodiment of a usual pressurised container packaging system win a flat disc as a piston at the bottom, and also with a pressure regulator.

Fig. 11 shows a view of an embodiment of a pressurised container packaging system according to the invention, namely without pressure regulator UPV/PCD, with a piston at the fop.

Fig, 12 shows a view of a further embodiment of a p-essurised container packaging system according to the invention, again without UPV/PCD, with a fiat disc as a piston at the fop.

Fig. 13 snows a view of yet a further embodiment of a pressurised container packaging system according to the Invention, again without pressure regulator but with a standard piston similar to that In Fig. 11, but at the o tfom>

Fig. 14 shows a view of yet a further embodiment of a pressurised oonta er packaging system according to the Invention, again without UPWCO but with a flat disc as a piston at the bottom.

Fig s 11a to 14a shows similar depictions in enlarged scale of the views of the pressurised container packaging system without pressure regulator accordi g to Figs 1 to 14 respectively. Description Th s invention in gen ral relates to a pressurised container sy¾tem_s as presented in ig, 1 amongst o hers, for ressuri ed packaging of continuous filling product, notably; f semi* isquid fluids, or in some cases discontinuous Hii g product of the type foams, past s, creams or also p ders. This pressurised container system comprises a containe 1 whic Is provided with a neck part 2¾ which largely consists of a plastic polymer, wth a pouring openi g 24, adjoining this a cylindrical casing part 22 which at i s feoitom side Is cut awa , aod a base part 21. At its top side, this can be closed with closure, wherein the container 1 is designed to resist an internal pressure which is higher than atmospheric pressure. The bottom side opposite the fop side is c sed by a separately added fease part 21 which is attached to the easing 22 by means of a connection 13. fig. 2 shows tfiat the container Is provided with a movable piston S, ø which is axially dispiaceabie following direction F_? along the main axis t of the pressurised container 1, between a bottom position A and a fop position S as shown in figs 11_* 12 and a to 14».

I Fig, 13 and 14, or 13s and 14a, the piston §, δ is mounted at the bottom in the container.

The piston §, 6 may also b mounted at the top In the container, as shown in Fig. 1 and 12, instead of at the bottom Me e, during fl n , the piston Is systematically pressed down. Th s has me great advantage that muc less air inclusions occur, so that in this way highly viscous products cars be tied with a high speed. This wa always a problem previously with highly viscous products, The piston may also be a bidirectional piston which is dispiaceabie in redproc&tino: fashion along the main xis ί between said bottom position A and fop position 8,

Fig, 11, 11a and 13 show a pressurised container system in which the piston 6 has a form protruding towards the top of the container, hich is suoh that in this way almost all the filling product can be expelled from the pressurised container system during operation thereof. Here, the piston takes the form matching the top 26 of the container, wherein in said top position 8 mis fits precisel therein and there Is almost no residual intermediate spac 27. Thus the piston has such a form that by means of this, the fling ~. 1 A — product can be expetfed from tie container by the us r. Tris is important ec use in normal aerosols and other similar packaging, t e product m& fee fully )φ«ΙΙβ&. This is an mm≠ of torn and mriduei waste, which s disadvantageous for recycling for exam l ,

The container 1 is for ex m le made of a plastic material Mftfcfo is blaxialy strefcbabie and has a h g intrinsic visc sity mmefy a nig Intrinsic viscosity which ¾ cr^raolertsed hy a ig pressure resistance. Also, a particular blow«moyidino, step n ay be applied coi>s in¾ of a so-called heat sel b!ow-mouldlng pr cess, whereby sa accelerated crystalsation effect of the latter mater a!, hot»fi T, is further amplified, in particular, said pari uiar blow<-oioyiding step Is used in preforms w ich ar blow-moulded in healed moud , wherein m even higher crystallisation 1$ promoted, whereo ooth tempe atu - and press e-sfaftlity are further increased. In particular, said ow moulds m y be heated to temperatures of at least 1 0^*0, up to 220*C, whereby the cr^talilsafion acceleration of hoHI!i RET is promoted.

T e pressurised container y tem contains ehemioal reinfefcemont, including by means of increased cr stalnity, vitrification temperature, poiymer biends, including the use of and increasing the erystallinlfy; and or chemical resislsrsce in particular by means of blonds, coatings I cluding m r o arlng,

With regard o the materials used, the container i made from a biaxJally etretchable plastic materia! with high Intrinsic viscosity, preferabiy polyesters, notar PET (polyethylene terephihatate) or PET copol esters wit a high pressure resistance. Examples of these copoiyesters are naphtha e, isosorbid or eopolyesiers contai ing spifoglyooL Those copotyeetere typically give a higher pressure resistance, a higher temperature resistance or a combination of both than PET. some o es, the container may also be made of a polyamide, polystyrene and OOC.

As we8 as chemical reinfercement which acts en the composition of the container In order to solve the problem of the necessary strength thereof, here ¾ is also possible to use other forms ef reinforcement, such as with a set of physical or mechanical relfifofoements, e.g. a double container. Then said reinforcement is formed by an inner container 2. Thus such a pressurised container system comprises an inner eontaine which Is fully enclosed in the container, in particular wherein the inner container is primariy intended io receive f iiing product therein. « 1 - in particular, the pressuhsed co t i e system is attaebed to trio ase thereof «?ith a me s m 12, forming d uble mtftofcm system ~ M fcfa the inne container 2 is t us also su o ed by the mai container 1 <

S Advantageously, saki double container system is such that a dou le wall Is rovid d here, tormina, an air layer if sa w s, in particular thermally s a insulating layer for heat T e ben fit of th double container results from the fact that certain properties are plastic-dependent, where i Is understood i8¾ai a certain plastic is not necessarily both strong and ohemlc^ily resistant Thus relnfor ced PET is very resistant to r ssure arid0 temperature, but not resistant to certain chemicals. Thus safci inner container may fee made of another plastic material, in particular PET for the outer container and PP tor trie Inner c ntaine , or also for ex m ¼ .

Aiso_t poiypro ylene may tor example be used on the inner side and PET en the outer 5 side, whereby the good properties of PET are then combined with the good properties of polypropylene. In this case, polypropylene and not PET is used fo the inner container, because PET does not toierate certain chemicals well, but does tolerate pressure and temperature. This is a secondary advantage of the double co italnar, 0 One feature of PET is that this is very resistant to temperature and pressure hut not very resistant to certain chemicals. One example of b fh&

are used is to provide an inner and outer container in the case of double containers, in order to solve this problem, 5 This choice is also dependent on what the filling product will be, and on the tiling pressure concerned since this is at least 20 bar, wherein PET is then a ^com a d choice If the wall thickness can be sufficiently high. However, at present, there Is a restriction in wai thickness namely to mm axim urn, because above this l w* moulding is difficult. Wall thicknesses above 0,8 to mm can no longer fee blow-mouldedD with an oplimum wail thickness distribution. This problem may be solved by two containers with a more limited wall th!oKneas being nested Inside each other. If the inner bottie begins to swell, the pressure will give further strength to the outer container. This is yet a further aoVanf a s of the double container, $ However, this can only be achieved by cutting one bottle. Othefwlse this is not possible, and thi is a problem for b¾ttle-ln-botile< So this ca oniy be done by blow-moulding the container, cutting it and inserting a piston, and closing it at the bottom with a separatel added base pert. In brief, bottle~in^»bottle cannot be obtained without cutting the bottle. Ths is lor constructional m so s, wherein a e arately add d ase must necessarily be fiddly connected, i order t replace the originally it base of the outer container, after ¾ e second container as been inserted. The present invention thus also r lates to a mef od for producing a preform o containe of o type for pressurised container ackaging wherein firstly a container casing profil with a longitudinal axis Is formed, thereafter this is out to the desired length Int an elongate element wherein the production process of the pressurised container takes place according to the following ste s: firstly a preform is made s semi^nished product by injection mouiding AA, wherein grains of plastic are dried, melted in a device and then driven into an injection mould; then said emifini he produot is blown SB in a blow mould into a bottie form, i.e.. tubular, as an secondary intermediate prodoct; and finally the underside of said secondar ntermediate product is cut CC to a specific length, wherein a separately added injectism-mouided base is then Included In said secondary intermediate produc

According to a specific embodiment, the inner and outer container are blow-mo ided from one and the same preform. Here, the preform Is produced using th k own technique of over-moulding, wherein the preform consists of two layers, an Inner layer end an outer layer, which may consist of two different maferiate. In a further enibodrment, there is no aefiesion between these layers, whereby alter olow-mouiriir^, a separate inner and an outer container are produced.

Claims

Container system fo packaging a continuous fling product under ressure, notably (seml- l u d fluids, resp> possibly d eontinoous fling product of the pe foams, pastes c e ms or also powders, comprising a container <1) which made of a plastic polymer and is provided with a neck part (23) with a oising opening (24) on its top s de, a casing part (22) adjacent thereto whieb forms the b dy of the container and Is cut off at its opposite side, and a base pari, wherein the container can e d sed o said top side via a closure, wherein t e container (1) is exposed to m internal pressure which is higher than atmospheric pressure, ehamderised in that said ca ng part (22) is out off at ¾s ofto ^ side |2§ opposite said top side and is closed by a separately added base part {21} made of plastic peiymer, which is attached to the casi g (22) b means of a connection (13)_s and w ich is provided with a movable piston (SO) which is axiatiy dispfaceable along the main axis (I) of the pressurised container between a bottom and a top position

(A, B).

Containe system according to the preceding claim, characterised in that the piston (5, 8) is mounted at the bottom of the con airser.

Container system according to Claim 1_y characterised in that ! e piston (5, 6) s mounted at the top of the container.

Container system according to any of the preceding claims, characteri ed in that the piston (8, 8} is a bidirectional piston, which is displaceable to and fro following an arrow direction ( ) along the main axis $ between said bottom and top positions (A, B).

Container system according to any of e preceding claims, characterised io that the piston (8) has a protruding form which s arched (18) towards the fop of the container, which Is such that virtually all the filling product can thus be expelled from the pressurised container system dumg its operation.

Container system according to the preceding claim, characterised in that the piston (8) virtually completely assumes the shape of the container top (26), wherein ail the product can be completely expelled from the inside. Pressnrised container s stem according to any of t e preceding claims, characterised in that said separately added b se part (21) is made of a plastic polymer.

Pressuri d co aine system according to any of the preceding claims, characterised In that a c osabie valve (47) provided In said separately added base part (21) for pressurSsatlon thereof, In particular a seif-olosaoie element, particular^? a high-pressure valve of the so-called "umoreila lug" (46) type, or via a two-stage element, particularly a so-called ^vc-stag Nicholson plog" (47).

Pressurised container system according to any of the Recedi g claims, characterised in that said casing part (22) has an approximately cylindrical shape.

Pressurised container system according to any of the p eceding claims, characterised In thai said plastic material! i formed by PET {polyethylene terepnthaiate).

Pressurised container system accor ing to t e preceding claim, characterised In that said plastic material is formed by a homopolyrner-type material with fast crystallisation.

Pressurised container system according to any of the preceding claims, onaracterlsed In that the container is made from plastic mater a In which che nicai reinforcements are included. re surised container system according to any of the preceding clai , characterised In that the container contains chemical reinfdrc¾menta, more specifically In the container wail (22) thereof (1), wherein he pressurised container is resistant to pressures of up to around 20 bar or more.

Pressurised container system according to any of the preceding claims, charactensed in that additives are added to a base plastic material, consisting of so-called orystallisers which are formed by constituents which significantly increase the crystallisation degree of a materia! in which they are m >

Pressurised container system according to the preceding clalm_t characterised in that said crystalSsers are formed by nucleators of the inorganic nucJeator type, such as In particular t leum. 18; Press rised container system according to Claim 14, char^otahsed in t at sasld crysfaisers are form d fe nucleaf ors of ie organic type, name organic sats, in particular carboxyi salts such as stearates.

5

1T< Pressurised container system according to an of the pfecading claims, ct ade d i that the container Is made from a plastic matena!, which s blaxlaly stfeicfeabie and has a higher intrinsic visc si y, being a higher Intrinsic viscosity which la featured b a higher pressure resistance, wherein said plastic 0 material from which the container is made is fenced fey polyester material which has a igher Intrinsic viscosity, more s o ific ^ of a order of magnitude of 0,7 to 1 ,2 g dS_s preferably 0,8 to 1 gfsM.

18. Pressurised container system according to the preceding claim, «rsaracterised in 5 that the container is made of a polyamide, polystyrene and COC_t or of polyesters, notably PET {polyethylene terep thalate) or PET copolyesters, with a higher pressure resistance, In particular wherein these oopelyesfer consist of copoiyesfers containing naphthatate, isosorfefde or splro^r col, wherein these co olyesters typically have a higher pressure resistance, a higher temperature 0 resistance or a combination of bot than PET.

18. Pressurised container sys em according to any of the preceding claims, characterised In that the basic plastic material at least partly comprises PEN. 5 20. Pressurised containe system according to any of Claims 1 to 18, crtaractensed in that the basic piastic material PET s a least parialry replaced &y Ρ Η,. wltb a PEN proportion of approximately 5 w<% and £S% PET, or w,% PEH and S% PET, to the nearest 1%, because of transparency of the container. 0 21, Pressurised containe system according to any of the preceding claims, in particular Claims 18 to 20, ¾aract fised In that said plastic material is formed by a hof-ftO polyester material, In particular PET_t wfHsreih the material ct siaiises mora quickly, which promotes temperaiura stability compared with standard FET> $ 22. Pressurised container system according to any of the preceding claims, characterised In that particular rJo -mouiding step Is applied consisting of a so- called heat set blow^mo«idng process, whereby said accelerated crystallisation effect of ttie latter material, hot-fill PET, Is f urther amplified. 23, Pressurised container s stem accordi g to th preceding claim, characterised in that said blow mouida are h ata to temperatures- of at least 120^*0, up to 220^*0, whereby the crystall sation acceleration of hot-fill PET is promoted,

24, Pressurised container system according to any of the preceding claims, characterised In that it contains chemical reinforcements, in a^rticular means of increased crystallinfty, glass transition temperature, polymer blends, including t e use of EN and increasing the orystainity; and/or chemical resistance, in partfcolar by means of blends, coatlnp, inclifdinej inter al coating,

2§. Pressurised container system according to any of the precedirsu claims, oharactensed in that ft contains at least one inner container (2), which Is fully e cl sed in the contai er { in particular wherei the inne container (2) is essentially inte ded for receiving the filling product therein,

2SL Pressurised container system according to any of the Claims 23 to 25, characterised in that said double oo ain system (12) comprises a douht wall forming an air layer In b twe n, In particular tharmaliy as an i ure s layer for the heat

27. Pr essuhsed containe sy tem according to the preceding claim, characterised in that said outer container is not pressurised d I therefore safe. 28, Pressurised container system according to one of the Claims 2$ or 27, characterised i that conta ner Is coloured, i adicul r the Inner container, which may function as a light barrier, wherein the inner container may function as a gas barrier, or increased moistore barrier. 2&. Pressurised container system ccording to an of the Claims 26 to 28, characterised I t at said inner container is made of a different plastic material,

30, Preaaurised container system according to the preceding; claim, characterised in that said in r container is made of PP or PE plastic material, and the outer container of PET. - 11

31 Pressurised container system according to any of the Claims 26 to 30, characterised in that said inner container consists of a mfxtor of t¾® different plastic materials.

32. Pressurised container system according to any of the Claims 26 to 31, characterised In that the pressurised container is resistant to ro$sores of up to around 30 ba and more.

33. Presum d container system ax¾ordir$g to any of the preceding claims, chajractefise*! In fhat i la furthe mvl d w¾ a set of physical atid/of meohanicaf reinforcements (30).

34. Pressunseo; container system ccordi g to one of bath rece ing claims,

®®&® &&ά ϊ^η that a set of reinforcing el ments 31_f 32) s provided, arranged wit a motuai spading on the inside and/or outside of the pressurised cont ine

(1 or v

35. Pressurised container system accord^') ng to one of l ?th eceding claims, characterised In that sa d reinforcing elements (31 , 32) are provided erip eral in particular with art almost constant cross-section, more particularly with a rotafienally symmetrical profile.

36. Pressurised container system according to one of oth preceding olaims, characterised in that sakl reinforcing elements {31} consist of a set of inner support rings {31 ) and (8') and/or a set of outer support ri gs (32) a d (1 tit) which are connected to the pressurised container (1).

37. Pressurised container syst m according to the preceding claim, characterised In that the reinforcements or rings are connected to the container by gluing or welding.

38. Pressurised container system according to Claim 34. charastehsed in thai the reinforcements or i gs are fixed to the container (1) without sufestanoe onding or material connection, in particular mechanically hy clamping or crimping thereof or similar. Pressurised container system accordin to an of the secedi g claims, in partcul r the r c di g cla m, chsmclaffsad ¾i that It Is transparent, in particular over lite container casin wall, more particularly at least over a part thereof.

Pressurised container system according to any of the Claims 1 to 34, c aract red In hat on said top side, it (1) is closed by a Id (2S) whic is attac ed to the container by means of a firm connection.

Pressurised container system according to fie preceding claim, characterised in that said connection fo me by a weld connaotl n (13), i particular by a laser, induction or ultrasonic connection, or possibly a glue connection.

Pressurised container system according to any of the Claims 25 to 41, characterised in that said boitte is welded twice on the bottom.

Pressurised containe system according to th preceding claims, characterised in that said bottle is welded via laser, ethod for ma ufactory a container, in particular of the type of a pr^sum>«d container packaging according to any of the preceding cl ims* ere i stty a container casing pro e (90} wliti a longitudinal axis is formed, tl eafier this o) Is cut to the esired length (L) ¾nio an elongate element |91} for od ctio of a cortainer a k gi g, clwacierised in that the manufacturing process of iha pressurised container is as follows;

- I a first step (AA), a preform Is manufactured as a sami-fmiahad product by injection moulding, whami plastic granules are dried, melted in a device and then driven Into an injection mould;

- In a following step (SB), said s mifi ishe product is fetow«n¼>uided in a blew mould Into a bottle form, in particular elongate {$), as a secondary intermediate product (3);

- In s$ft further step ICC), the underside of s id seeoi lary Intermediate product 3) Is out to a specific length, wherein a separately ded ln ectlon-mo¾}ided feas (21) is then included in said secondary Intermediate product {3).

Me hod according to the preceding claim, characterised in that the piston is filled at the top arid the piston is driven downward and ih i¾ pressurised. Method according to one of both preceding claims, characterised in that said connection (12) is produced by means of gluing, folding or welding, in particular laser welding, induction welding or ultrasonic welding,

Method for manufacturing plastic hollow objects for injection moulding, in particular according to any of claims 44 to 46, wherein primary raw material is Injected Into a mould (3) with a core side (31 ) and a cavity side (32), between which hollow objects (10) are formed, whereupon the mould (3) is opened Into Its two halves (31, 32), of which the cores (33) each carry a hollow object, characterised In that as hollow objects, composite preforms (10) are made which consist of part forms (11) and (12) and which are intended to be processed Into plastic containers, in that secondary raw material for manufacturing a secondary preform (12), added to each preform (10), is injected into the Injection mould (3) which is equipped with multiple cavities and has an even number of cavities or cores (33, 34) of at least two, and in that both part forms (1 ) and (12) are moulded simultaneously, wherein furthermore the steps are performed for making these by overmoulding.

Method according to the preceding claim, characterised in that the inner and outer containers are blow-moulded from one and the same preform, wherein this preform is manufactured by overmoulding, wherein the preform consists of two layers, an inner layer and an outer layer, which in particular consist of two different materials.

Method according to the preceding claim, characterised In that there is no adhesion between the two said layers, whereby after blow-moulding, a separate inner and outer container are formed,