DE10027924A1 - Blow-molding thermoplastic container with gas barrier properties, controls temperatures of blow molding segments and base inserts to specified levels - Google Patents

Abstract

Blow molding segments (40, 41) are tempered to a mean surface temperature of 40 deg C-170 deg C. The base insert (42) is held at a temperature below this level. An Independent claim is included for the container with gas barrier properties, which is characterized by a BIF value exceeding 2, where BIF is the barrier improvement factor, measured by comparison with standard material (PET). Barrier component is distributed homogeneously in the main material of the container, its weight being up to 30% of that of the main component. Container volume is up to1 l. Neck length is up to 80% of the maximum main body diameter. Preferred features: Cooling time in the base insert region is at least 1.2 seconds. Base contour flattening after blowing, is at most, 25% of centrum to base surface spacing, before extraction from the mold. Standing ring thickness is no less than 1.2 mm. Coloring is included. A substance fixes permeating gases. At the external thread around the mouth, vent slots are included, with rounded contours. Thread internal diameter over the mouth section is reduced in comparison with a standard thread. The mouth is designed to take a crown bottle cap or a swing clip bung closure. A side wall is locally- and inwardly curved to the extent of 1%-2%. Internal curvature of the sidewall is about 1.4 %. Two circles defining curved profile at the basal dome angle are offset from a longitudinal axis by at least 3 mm. A curved profile in the region of the dome angle of the base, is defined by two circles with eccentric centers, relative to a vessel longitudinal axis. Offset amounts to at least 3 mm. A side wall of the container starts from a base section and runs to a vessel shoulder conically. The side wall steps into the vessel shoulder.

Description

The invention relates to a method for manufacturing a container made of a thermoplastic through blow molding and biaxial orientation, in which a preform is inserted into a blow mold and through Exposure to a pressure medium is expanded, and at a blow mold to contour the container at least two blow mold segments and a bottom sentence is used.

The invention also relates to a container made of a homogeneous thermoplastic material with bar barrier properties with regard to wall permeability for gases produced by blow molding from a preform is produced and its barrier characteristics  corresponds to at least one factor BIF <2, and one Resistance to deformation up to a tempera door action of at least 60 °, and one bottle-like design with an inward vault th floor, which is surrounded by a base ring.

Such containers are in different designs known forms. Concerning the barrier properties Here in particular resistance to an escape of carbon dioxide from an interior of the container in an environment and opposite an one penetrate oxygen from the environment into an inner liquid stored in half of the container. Ty process to achieve sufficient A plasma, for example, provides barrier properties Evaporation with silicon dioxide or carbonaceous Materials, furthermore it is also known to use multilayer containers, at least of which a location with the increased barrier properties verse hen is. The barrier properties are generally compared to using standard mat rial measured from PET, the BIF factor being determined becomes. BIF means "Barrier Improvement Factor ". A factor of BIF = 2 denotes a ver double barrier effect against the use of Standard material.

The implementation of plasma coating processes requires a considerable amount of apperative effort, whereby the use of carbonaceous coatings also concerns about health issues encountered threats. A use of multilayer Preforms caused to produce the container  in the injection molding of the preform a lot of effort, the corresponding costs Consequence.

A general process for blow molding containers is described for example in DE-OS 43 40 291. Possibilities to control different blow pressures ke are specified in DE-OS 41 13 874. A before direction for carrying out the procedure is in the DE-OS 42 12 583 described.

Containers made from preforms can have different properties and uses ben. Both disposable containers and how are known the fillable container. They are also containers known, which also elevated temperatures at an Ab filling or when performing Withstand washing and / or pasteurization processes.

The formation of such a container can for example wise so that first a preform from Po lyethylene terephthalate (PET) in the injection molding process is put, and that after an intermediate storage of Preform heated and then the blowing station is fed. But it is also known to container after to produce the injection-blowing process, in which without Intermediate heating of the preform un indirectly after its production and after reaching egg ner sufficient stability of the blowing station supplied becomes. Finally, it is also known to preform out Manufacture pipe sections in the area of their  locked at one end and in the area of their other en be provided with a suitable muzzle.

Common to all processes is that the preform is a has a much smaller shape than that placing containers. The preform therefore becomes internal half of the blowing station pressurized with air to him to form the container to be manufactured. With this Inflation takes place in addition to reducing the Wall thickness by enlarging the surface of an Ori entation of the material. This causes the thin Wall of the container has a very high dimensional stability having the container for a variety of Ver makes turns suitable.

There are different ways to carry out the blowing process che procedures known. For one thing, it is possible for one to use uniform blowing pressure in the up blowing preform initiated and after one out sufficient shape from the finished container is released against an ambient pressure. It is also already known, initially a pre-expansion of the preform, which is already relatively wide approximates the shape of the container to be manufactured with a lower pressure, and only the off Embossing the finer contour of the container with a height pressure. Even with this procedure after the production of the container, the blown air against egg vented ambient pressure.

Depending on the application, when specifying the bar different properties in the foreground stand reason. In the case of carbonated soft drinks  the main requirement is a coal escape Dioxide through the container wall to the outside avoid or reduce. With a loading stocking of fruit juices, beers or other oxygen sensitive beverages or food on the other hand, the main requirement is penetration of oxygen through the container wall through into the stored liquid avoid or reduce. Generally exists the problem that is for an improvement in Barrie suitable properties have toxic effects can and that is why when filling liquid that are intended for consumption, a direct contact between the liquids and the substances to improve the barrier properties should be avoided.

In general, there is a high need for the required barrier properties with low appe ratative effort, little time and as much as possible to achieve low costs. Impairments of Product quality from inside the container Beverage must also be excluded. With the previously known methods and pre directions can be individual requirements Ride fairly well, a common satisfaction however, all requirements could be met have not yet been achieved.

The object of the present invention is therefore a Methods of the type mentioned in the introduction to ver improve that the egg properties of the manufactured containers in relation to the  Shelf life of filled products improved become.

This object is achieved in that the blow mold segments to a medium surface temperature temperature in the range from 40 ° C to 170 ° C the and that the ground use at a temperature un below the average surface temperature of the blow mold segments is held.

Another object of the present invention is to NEN container of the type mentioned in the introduction give a manufacture with improved barrier properties supported by inexpensive production becomes.

This object is achieved in that a material main compo as material for the container element and a barrier component with essentially homogeneous distribution are used, the weight the barrier component a maximum of 30% of the weight of the Main material component is that the container volume men maximum 1 ltr. is and the base ring is a mate rialdicke of at least 1 mm and that the Be container has a base and a neck, wherein a neck length of at least 20% of the container length wearing and a maximum neck diameter of at most 80% of a maximum diameter of the base body.

The bottle geometry explained above and at process sequence of the container production make it possible to use an inexpensive constituting preform from a homogeneous material  and avoiding costly plasma consumption layering process a container made of plastic to deliver, compared to a standard bottle made of PET increased thermal and mechanical resistance and which has barrier properties which is in particular a use for recording Support beer or beverages containing beer. By the higher thermal resistance makes it possible to egg to go through pasteurization treatment. The heightened barrier properties make it possible with an Ab filling of beer, penetration of critical amounts To prevent oxygen, or at least he to significantly decrease.

Product optimization can be achieved by combining the explained bottle design, a design of the shaping blow mold, a design of the as from product used preform, the selection the bottle process to be used and the process Process reached when performing the blowing process become.

Improved material consolidation in the soil area of the container can be achieved in that a Cooling time in the area of the floor insert at least 2 Se customer amounts.

This can result in improved contour stability be that a contour flattening of the container bottom after blowing a maximum of 25% of the distance between a container surface to a center of the ground in front of a Removal of the blown container from the blow mold makes.  

It also proves with regard to the contour stability as advantageous that the floor flattening after pasteurizing a maximum of 55% of the distance a container base to a center of the bottom before removing the blown container from the Blow mold.

An additional increase in stability can he be enough that the material thickness in the range of Standring is at least 1.2 mm.

An impairment of the quality of the filled Pro duktes can be avoided that at least there is material coloring in some areas.

Another way to reduce penetration Gas amounts are that at least in some areas a substance for the accumulation of penetrating gases is arranged.

An easy way to lock is that in the area of a mouth section of the container External thread is arranged.

To avoid a sudden internal pressure discharge when opening the container it is proposed that at least one vent in the area of the external thread tion slot is arranged.

To reduce notch stresses, it is proposed that that the vent slot has a rounded contour is provided.  

An additional increase in stability can he be enough that the mouth section in the area of Male thread has a reduced inner diameter has.

Another possibility of locking is that the mouth section for the arrangement of a crown cap is designed.

It is also contemplated that the mouth section is designed to arrange a bow lock.

To take into account a container expansion at a Exposure to an internal pressure is proposed that a side wall of the container at least area to an extent of 1% to 2% based on one Container diameter in the direction of a container interior is vaulted. In particular, is out from the floor towards the container shoulder also thought of a conical course.

In particular, it proves advantageous that the Inner curvature of the side wall is about 1.4%.

A penetration rate of harmful gases can continue be reduced in that in the area of a container at least one substance an incoming gas is arranged.

A typical choice of materials is that as Main material component PET is used.  

It is also thought that as material main comm component PP is used.

Another variant is that as a material main component PEN is used.

This enables him to achieve particularly good barrier properties be enough to use nylon as a barrier component det.

It is also possible that as a barrier component EVOH is used.

Another variant can be seen in the fact that as a bar Rierekomponent PEN is used.

An expanded range of materials is available represents that as a barrier component a PET copolymer sat with increased isophthalic acid content is used.

A barrier increase by storing particles in the polymer matrix can be done in that as Barrier component a polymer mixture with solid par article is used.

Exemplary embodiments of the invention are shown in the drawing shown schematically. Show it:

Fig. 1 a longitudinal section through a preform,

Fig. 2 shows a partial longitudinal section through a container designed as a bottle,

Fig. 3 is a perspective view of the container of FIG. 2 in a view obliquely from un th,

Fig. 4 is a longitudinal section through a blow mold in which a preform is stretched and expanded and

Fig. 5 is a sketch to illustrate a basic structure of a device for blow molding containers.

A preform ( 1 ) according to the embodiment in FIG. 1 consists of a mouth section ( 2 ), a support section ( 4 ) separating the mouth section ( 2 ) from a neck area ( 3 ), a neck area ( 3 ) into a wall section ( 5 ) overlapping shoulder area ( 6 ) and a floor ( 7 ). The support ring ( 4 ) projects beyond the mouth section ( 2 ) transversely to a longitudinal axis ( 8 ) of the preform. In the region of the shoulder region ( 6 ), the outer diameter of the preform ( 1 ) extends from the neck region ( 3 ) in the direction of the wall section ( 5 ). In a container ( 13 ) to be produced from the preform ( 1 ), the wall section ( 5 ) essentially forms the side wall of the container. The bottom ( 7 ) is rounded.

The mouth section ( 2 ) can, for example, be provided with an external thread ( 12 ) which enables a screw closure to be placed on the finished container ( 13 ). But it is also possible to provide the Mün tion section ( 2 ) with an outer bead to create a surface for a crown cap. In addition, a variety of other designs are conceivable to enable plug-in closures.

From the illustration in Fig. 1 it can be seen that the wall section ( 5 ) has an inner surface ( 9 ) and an outer surface ( 10 ). The inner surface ( 9 ) delimits a preform interior ( 11 ).

In the shoulder area ( 6 ), the thickness of a preform wall ( 14 ) can extend from the neck area ( 3 ) in the direction of the wall area ( 5 ) with increasing wall thickness. In the direction of the preform's longitudinal axis ( 8 ), the preform ( 1 ) has a preform length ( 15 ). In the direction of the preform longitudinal axis ( 8 ), the mouth region ( 2 ) and the support ring ( 4 ) extend with a common mouth length ( 16 ). The neck region ( 3 ) has a neck length ( 17 ) in the region of the longitudinal longitudinal axis ( 8 ) preform. In the neck region ( 3 ), the preform ( 3 ) preferably extends with a constant wall thickness.

The preform ( 1 ) has a wall thickness ( 18 ) in the wall area ( 5 ) and a floor thickness ( 19 ) can be found in the area of the bottom ( 7 ). A further dimensioning of the preform ( 1 ) takes place with the aid of an inner diameter ( 20 ) and an outer diameter ( 21 ), which are measured in the approximately cylindrical wall area ( 5 ).

In the bottle-shaped container ter ( 13 ) shown in Fig. 2, the mouth section ( 2 ) and the support ring ( 4 ) are essentially unchanged. The further area of the container ( 13 ) is expanded relative to the preform ( 1 ) by the biaxial orientation carried out both in the transverse direction and in the longitudinal direction. The container ( 13 ) hereby has a container length ( 22 ) and a container diameter ( 23 ) which, in view of the ge inaccuracies to be taken into account, is not to be distinguished below with regard to the specific inner diameter or outer diameter.

Fig. 2 shows, among other things, the bottom area of the blow-molded container ( 13 ). The container ( 13 ) has a side wall ( 24 ) and a container base ( 25 ). In the exemplary embodiment shown, the container bottom ( 25 ) consists of a standing ring ( 26 ) and a dome ( 28 ) which is curved inwards in the direction of a container interior ( 27 ). The cathedral ( 28 ) is formed from a cathedral slope ( 29 ) and a center ( 30 ).

The container ( 13 ) has a container mouth length ( 31 ) and a container neck length ( 32 ), at least the container mouth length ( 31 ) generally being equal to the mouth length ( 16 ) of the preform ( 1 ).

Heating the preform ( 1 ) before the orientation process is conceivable in different variations. When using a tunnel-like heating section, the temperature is only dependent on the length of stay. However, it is also conceivable to use radiant heaters which strike the preform ( 1 ) with infrared or high-frequency radiation. With the help of such radiators it is possible to generate a temperature profile in the area of the preform ( 1 ) in the direction of the longitudinal axis ( 8 ).

If such a radiant heater is formed from a plurality of independently controllable heating elements which are arranged one above the other in the direction of the longitudinal axis ( 8 ), it can be controlled by a more intensive control of the heating elements in the region of the preform in the direction of the mouth section ( 2 ) ( 1 ) in the thickened area of the wall section ( 5 ) a higher thermal energy is radiated than in the area of the wall section ( 5 ) facing the bottom ( 7 ). With only uniformly controllable radiant heaters, such a heat profile can also be realized by arranging the heating elements with in the direction of the longitudinal axis ( 8 ) at different distances.

Fig. 3 shows the container ( 13 ) in a perspective view from below. In particular, in addition to the illustration in FIG. 2, it can be seen again that the container neck ( 33 ) extends from the support ring ( 4 ) in the direction of a container shoulder ( 34 ). To increase stability is terschulter Join the Tanks (34) which tapers starting from the container neck (33) in the direction of a base body (35) passes (35) überge of a shoulder (36) in the base body. To further increase stability, the base body ( 35 ) is transferred via a further shoulder ( 37 ) into a bottom taper ( 47 ) which is limited by the base ring ( 26 ) in the area of its extension facing away from the base body ( 35 ).

The basic structure of a device for shaping the preform ( 1 ) into the container ( 13 ) is shown in FIG. 4.

The device for forming the container ( 13 ) consists essentially of a blow molding station ( 38 ) which is provided with a blow mold ( 39 ) into which a preform ( 1 ) can be inserted. The preform ( 1 ) can be an injection molded part made of polyethylene terephthalate. To enable the preform ( 1 ) to be inserted into the blow mold ( 39 ) and to enable the finished container to be removed, the blow mold ( 39 ) consists of blow mold segments ( 40 , 41 ) and a bottom insert ( 42 ) that can be positioned by a lifting device is. The preform ( 1 ) can be held in the area of the blowing station ( 38 ) by a transport mandrel ( 43 ) which, together with the preform ( 1 ), runs through a plurality of treatment stations within the device. However, it is also possible to insert the preform ( 1 ) directly into the blow mold ( 39 ), for example using pliers or other handling means.

To allow a compressed air supply line is arranged below the transport mandrel ( 43 ) to a not shown on the piston, which supplies the preform ( 1 ) with compressed air and at the same time performs a seal relative to the transport mandrel ( 43 ). In the case of a modified construction, it is also conceivable, in principle, to use fixed compressed air supply lines.

The preform ( 1 ) is stretched with the aid of a stretching rod ( 44 ) which is positioned by a cylinder. Basically, however, it is also conceivable to carry out a mechanical positioning of the stretching rod ( 44 ) over curve segments which are acted upon by grip rollers. The use of Kur vensegmenten is particularly useful when a plurality of blowing stations ( 38 ) are arranged on a rotating blowing wheel ( 53 ). The use of cylinders is expedient if there are blowing stations ( 38 ) arranged in a fixed position.

To adapt to different shapes of the mouth section ( 2 ) according to FIG. 4, the use of separate thread inserts ( 45 ) is provided in the area of the blow mold ( 39 ). In addition to the preform ( 1 ) and the finished-blown container ( 13 ), a developing bubble ( 46 ) is also shown.

Fig. 5 shows the basic structure of a Blasma machine, which is provided with a rotating heating wheel ( 52 ) and a rotating blowing wheel ( 53 ). Starting from a preform delivery ( 54 ), the preforms ( 1 ) are transferred from transfer wheels ( 55 , 56 ) into the area of the heating wheel ( 52 ). Along the heating wheel ( 52 ) radiant heaters ( 57 ) and blowers ( 58 ) are net angeord to temper the preforms ( 1 ). After the preforms ( 1 ) have been adequately tempered, they are transferred to the blowing wheel ( 53 ), in the area of which the blowing stations ( 38 ) are arranged. The finished blown container ( 13 ) are fed from other transfer devices to an output section ( 59 ).

In order to be able to form a preform ( 1 ) into a container ( 13 ) in such a way that the container ( 13 ) has material properties that ensure a long usability of food filled inside the container ( 13 ), in particular beverages, must be guaranteed Special process steps for heating and orienting the preforms ( 1 ) are followed. In addition, advantageous effects can be achieved by adhering to special dimensioning regulations.

Different thermoplastic materials can be used Plastics are used. Can be used at for example PET, PEN or PP.

The expansion of the preform ( 1 ) during the orientation process is carried out by compressed air supply. The compressed air supply is divided into a pre-blowing phase in which gas with a low pressure level is supplied and a subsequent main blowing phase in which gas with a higher pressure level is supplied. Compressed air with a pressure in the interval from 5 bar to 25 bar is used during the pre-blowing phase and compressed air with a pressure in the interval from 25 bar to 40 bar is supplied during the main blowing phase. Within the blown container, there is usually a pressure in the range from about 2 bar to 10 bar during the blowing phase.

To ensure an exact contour of the container ( 13 ), it is provided to provide the blow molding station ( 38 ) with a mold locking device which, by means of a pneumatic preload, despite the effective internal pressure during the main blow phase, forms a gap in the area of the boundary surfaces of the blow mold segments ( 40 , 41 ) avoid.

According to a typical dimensioning, the container neck length ( 32 ) is at least 20% of the total length of the container ( 13 ). A maximum diameter of the container neck ( 33 ) is at most 80% of the maximum diameter of the container ( 13 ).

The preform ( 1 ) for the production of the container ( 13 ) can be provided with a coloring in such a way that the transmission of light is rich in at least one wave area, which is harmful with regard to the product to be filled, is reduced. The preform ( 1 ) has a long conical area below a short cylindrical partial area below the support ring ( 4 ). Ventilation slots ( 48 ) in the area of an external thread ( 49 ) of the mouth section ( 2 ) are preferably provided with a rounded contour in order to reduce notch effects when exposed to internal pressure. A reinforcement of the thread can be achieved by a reduced inner diameter in the area of the mouth portion ( 2 ).

A typical container length ( 22 ) is in the range from 200 mm to 300 mm. A container length in the range of approximately 250 mm is preferred. The container neck length ( 32 ) be at least 20% of the container length ( 22 ). A diameter of the container neck ( 33 ) in the area of a transition to a container shoulder ( 50 ) is a maximum of 80% of a maximum container diameter. An outer contour of the container neck with a conical design runs between the container shoulder ( 50 ) and the mouth section ( 2 ). The expansion takes place starting from the mouth section ( 2 ) towards the container shoulder ( 50 ).

The conical shape of the neck of the container takes place essentially along a circular contour with a radius less than 500 mm. A radius in the range of approximately 350 mm is preferred. A curvature transition between the container neck and the container shoulder ( 50 ) takes place with a radius of curvature <30 mm. A typical curvature is in the range of a radius of curvature of 15 mm. In general, such a radius can preferably be in the range from 10 mm to 20 mm.

A course of curvature in the area of the container shoulder ( 50 ) typically runs with a radius of curvature of <60 mm. A curvature interval with a radius of curvature in the range from 25 mm to 35 mm is typical, for example the radius can be 30 mm.

For further stiffening, the container shoulder ( 50 ) is passed through a shoulder ( 51 ) into the side wall ( 24 ). An angle of inclination in the area of the shoulder ( 51 ) is typically below 60 °. The side wall ( 24 ) is transferred into a base part ( 61 ) via a further shoulder ( 60 ). Here, too, is an inclination angle of the heel ( 60 ) below 60 °.

A dome height of the dome ( 28 ) measured between a lower boundary of the base ring ( 60 ) and the center ( 30 ) is typically more than 8 mm. A value of about 12 mm is typical. A course of curvature in the region of the dome slope ( 29 ) typically has a radius of curvature of 20 mm to 60 mm. A value of about 40 mm is typical. Starting from the base ring ( 26 ), the contour of the dome slope ( 29 ) in cross section is defined by two eccentric radii. Each associated circle center points have a lateral offset with respect to the longitudinal axis of the container. The lateral offset is at least 3 mm. A typical value is around 6 mm.

With regard to the radius of curvature of the dome slope ( 29 ), this can be defined in that the radius of curvature is at least 0.65 times the diameter of the standing ring.

Claims (30)

1. A method for producing a container from a thermoplastic material by blow molding and biaxial orientation, in which a preform is inserted into a blow mold and expanded by the action of a pressure medium, and in which a blow mold consisting of at least two blow mold segments and a bottom is used to contour the container set is used, characterized in that the blow mold segments ( 40 , 41 ) are tempered to an average surface temperature in the range from 40 ° C to 170 ° C and in that the bottom insert ( 42 ) is at a temperature below the average surface temperature of the blow mold segments ( 40 , 41 ) is held. 2. The method according to claim 1, characterized in that a cooling time in the area of the bottom insert ( 42 ) is at least 1, 2 seconds. 3. The method according to claim 1 or 2, characterized in that a contour flattening of the container bottom ( 25 ) after blowing a maximum of 25% of the state from a container base to a center ( 30 ) of the bottom before removal of the blown container ( 13 ) from the blow mold ( 39 ). 4. The method according to any one of claims 1 to 3, characterized in that the bottom flattening after a thermal treatment a maximum of 55% of the distance of a container base to a center ( 30 ) of the bottom before removal of the blown container ( 13 ) from the blow mold ( 39 ) matters. 5. Containers made of a homogeneous thermoplastic material with barrier properties with regard to a wall permeability for gases, which is produced by blow molding from a preform and whose barrier characteristic corresponds to at least one factor BIF <2, and which is resistant to deformation up to a temperature effect of at least 60 ° C and which has a bottle-like design with an inwardly curved bottom, which is surrounded by a standing ring, characterized in that a material main component and a barrier component with a substantially homogeneous distribution as the material for the container ( 13 ) are used, the weight of the barrier component being a maximum of 30% of the weight of the main material component, that the container volume is a maximum of 1 liter. is and the base ring has a material thickness of at least 1 mm and that the container ( 13 ) has a Grundkör by ( 35 ) and a container neck ( 33 ), where with a container neck length ( 32 ) at most 80% of its maximum diameter of the base body ( 35 ) is. 6. Container according to claim 5, characterized in that the material thickness in the region of the standing ring ( 26 ) is at least 1.2 mm. 7. Container according to claim 5 or 6, characterized records that at least in some areas Material coloring is present. 8. Container according to one of claims 5 to 7, characterized characterized in that at least in some areas Arranged substance for the accumulation of penetrating gases is not. 9. Container according to one of claims 5 to 8, characterized in that in the region of a Mündungsab section ( 2 ) of the container ( 13 ) an external thread ( 49 ) is arranged. 10. A container according to claims 9, characterized in that at least one vent slot ( 48 ) is arranged in the region of the external thread ( 49 ). 11. A container according to claim 10, characterized in that the ventilation slot ( 48 ) is provided with a rounded contour. 12. Container according to one of claims 5 to 11, characterized in that the mouth portion ( 2 ) in the region of the external thread ( 49 ) has a reduced internal diameter compared to a standard thread. 13. Container according to one of claims 5 to 11, characterized in that the mouth section ( 2 ) is designed for the arrangement of a crown cap. 14. Container according to one of claims 5 to 13, characterized in that the mouth section ( 2 ) is designed for arranging a clip closure. 15. Container according to one of claims 5 to 14, characterized in that a side wall ( 24 ) of the loading container ( 13 ) at least in regions from 1% to 2% based on a container diameter in the direction of a container interior ( 27 ) is arched. 16. A container according to claim 15, characterized in that the inner curvature of the side wall ( 24 ) is approximately 1.4%. 17. Container according to one of claims 5 to 16, characterized characterized in that in the area of a container closure  a substance for attachment at least an incoming gas is arranged. 18. Container according to one of claims 5 to 17, characterized characterized in that the main material component is PET is used. 19. Container according to one of claims 5 to 18, characterized characterized that PP as the main material component is used. 20. Container according to one of claims 5 to 19, characterized characterized in that the main material component is PEN is used. 21. Container according to one of claims 5 to 20, characterized characterized in that as a barrier component nylon is used. 22. Container according to one of claims 5 to 21, characterized characterized in that as a barrier component EVOH is used. 23. Container according to one of claims 5 to 22, characterized characterized in that the barrier component PEN ver is applied. 24. Container according to one of claims 5 to 23, characterized characterized in that a PET as a barrier component Copolymer with a comonomer content of min at least 1.5 mol% is used.   25. Container according to one of claims 5 to 24, characterized characterized in that a PET as a barrier component Copolymer with an isophthalic acid content of at least 1.5 mol% is used. 26. Container according to one of claims 5 to 25, characterized characterized in that a Po as a barrier component polymer mixture with solid particles is used. 27. Container according to one of claims 5 to 25, characterized in that a curvature in the region of a dome slope ( 29 ) of the container bottom of two relative to a longitudinal axis of the container with eccentric circle centers arranged circles is defi ned. 28. Container according to claim 27, characterized in that an offset between the centers of the circles and the longitudinal axis of the container is at least 3 mm. 29. Container according to one of claims 5 to 28, characterized in that a side wall ( 24 ) of the loading container, starting from a bottom part ( 60 ) in the direction of a container shoulder ( 50 ) is tapered ver. 30. Container according to one of claims 5 to 29, characterized in that the side wall ( 24 ) via egg nen paragraph ( 51 ) in the container shoulder ( 50 ) is passed.