CONTAINER HAVING AN UNFOLDED CONTAINER LAYER, CONTAINING A PLURALITY OF PARTICLES, AND HAVING A POLYMER LAYER

20210130030 · 2021-05-06

    Inventors

    Cpc classification

    International classification

    Abstract

    The invention relates to a container comprising a container wall that partly surrounds a container interior, wherein the container wall a) has a container opening; b) comprises a container layer comprising i) a multitude of particles, and ii) no fold and no crease;  and c) comprises a first polymer layer that at least partly superimposes the container layer;
    wherein the container interior a. has a maximum diameter in a plane perpendicular to a height of the container interior, and b. has a diameter less than the maximum diameter of the container interior at least in sections in the direction from the plane to the container opening.

    The invention further relates to a method of superimposing a container precursor with a polymer composition; a container obtainable by that method; an apparatus for superimposing a container precursor with a polymer composition; a method of filling and closing one of the aforementioned containers and the closed container obtainable thereby; and uses of a filling machine, of one of the aforementioned containers, of a polymer composition, and of a powder coating system.

    Claims

    1. A container comprising a container wall that partly surrounds a container interior, wherein the container wall a) has a container opening; b) comprises a container layer comprising i) a multitude of particles, and ii) no fold and no crease;  and c) comprises a first polymer layer that at least partly superimposes the container layer; wherein the container interior a. has a maximum diameter in a plane perpendicular to a height of the container interior, and b. has a diameter less than the maximum diameter of the container interior at least in sections in the direction from the plane to the container opening.

    2. The container as claimed in claim 1, wherein the particles of the multitude of particles are fibers.

    3. The container as claimed in claim 2, wherein the fibers comprise a chemical pulp or a mechanical pulp or both.

    4. The container as claimed in claim 1, wherein the container layer comprises solids in a proportion within a range from 50% to 99.9% by weight, based on the weight of the container layer.

    5. The container as claimed in claim 1, wherein the first polymer layer at least partly superimposes the container layer on a side remote from the container interior.

    6. The container as claimed in claim 1, wherein the first polymer layer at least partly superimposes the container layer on a side facing the container interior.

    7. A method comprising, as method steps, a) providing a container precursor comprising a container precursor wall partly surrounding a container precursor interior, wherein the container precursor wall I. has a container precursor opening, and II. comprises a container layer comprising a multitude of particles,  wherein the container precursor interior i. has a maximum diameter in a plane perpendicular to a height of the container precursor interior, and ii. has a diameter less than the maximum diameter of the container precursor interior at least in sections in the direction from the plane to the container precursor opening; and b) at least partly superimposing the container layer with a first polymer composition.

    8. The method as claimed in claim 7, wherein the container layer does not comprise any fold or any crease.

    9. The method as claimed in claim 7, wherein the container precursor is provided in process step a) with a minimal first moisture content of the container layer, wherein the container layer in method step b) has a further moisture content, wherein the minimal first moisture content differs from the further moisture content by not more than 10% by weight, wherein each of the moisture contents are based on the weight of the container layer.

    10. The method as claimed in claim 7, wherein the providing of the container precursor in method step a) comprises producing the container layer from a composition, wherein the composition comprises a. the multitude of particles, and b. a liquid.

    11. The method as claimed in claim 7, wherein the container layer in method step b) is superimposed with the first polymer composition at least on a side facing the container precursor interior.

    12. The method as claimed in claim 7, wherein the container layer in method step b) is superimposed with the first polymer composition at least on a side remote from the container precursor interior.

    13. The method as claimed in claim 7, wherein the first polymer composition comprises a first multitude of polymer particles.

    14. The method as claimed in claim 7, wherein the container layer in method step b) has a moisture content within a range from 0% to 20% by weight, based on the weight of the container layer.

    15. The method as claimed in claim 7, wherein the first polymer composition in method step b) has been electrically charged with respect to the container precursor wall.

    Description

    [0190] The figures respectively show, in schematic form and not to scale, unless stated otherwise in the description or the respective figure:

    [0191] FIG. 1 a schematic diagram of a container of the invention;

    [0192] FIG. 2 a schematic diagram of a further container of the invention;

    [0193] FIG. 3 a schematic cross-sectional diagram of the container of the invention from FIG. 2;

    [0194] FIG. 4 a schematic cross-sectional diagram of a further container of the invention;

    [0195] FIG. 5 a schematic cross-sectional diagram of a further container of the invention;

    [0196] FIG. 6 a schematic cross-sectional diagram of a further container of the invention;

    [0197] FIG. 7 a flow diagram of a method of the invention for producing a container;

    [0198] FIG. 8 a schematic diagram of an apparatus of the invention;

    [0199] FIG. 9 a flow diagram of a method of the invention for filling and closing a container;

    [0200] FIG. 10 a scheme for production of a container blank;

    [0201] FIG. 11 a scheme for production of a container precursor;

    [0202] FIG. 12 a further scheme for production of the container precursor;

    [0203] FIG. 13 a further scheme for production of the container precursor;

    [0204] FIG. 14 a further scheme for production of the container precursor;

    [0205] FIG. 15 a further scheme for production of the container precursor;

    [0206] FIG. 16 a further scheme for production of the container precursor; and

    [0207] FIG. 17 a photograph of a half-shell of the negative mold of the container blank in FIG. 10.

    [0208] FIG. 1 shows a schematic diagram of a container 100 of the invention. The container 100 comprises a container wall 102 that at least partly surrounds a container interior 101. The container wall 102, as indicated in the encircled detail diagram, consists of a sequence of the following layers in superposed succession in the direction from the container interior 101 outward: an inner polymer layer 105 of PLA, a container layer 103, and an outer polymer layer 104 of polyethylene. The outer polymer layer 105 here is the first polymer layer of the invention. According to the invention, the inner polymer layer 105 is the further polymer layer. The outer polymer layer 104 and the inner polymer layer 105 are each fully coated onto the container layer 103. Thus, the outer polymer layer 104 completely covers the container layer 103 on its side remote from the container interior 101. In addition, the inner polymer layer 105 completely covers the container layer 103 on its side facing the container interior 101. The container 100 is a bottle having a container opening 106 in a mouth region 107. The mouth region 107 is connected to a bottle body 109 via a bottle neck 108. The container layer 103 consists to an extent of 92.9% by weight, based on the total weight of the container layer 103, of fibers obtained from spruce wood as ground wood with an average fiber length of 1.5 mm. In addition, the container layer 103 has a moisture content of 7% by weight, based on the total weight of the container layer 103, and includes 0.1% by weight of additives, for example AKD and ASA, as hydrophobizing agents. The container layer 103 does not include any fold or seam at all. The container 100 includes the outer polymer layer 104 in a proportion of 5% by weight, based on the total weight of the container 100. The inner polymer layer 105 is included in the container 100 in a proportion of 15% by weight, based on the total weight of the container 100. The container interior 101 has a maximum diameter 111 in a plane perpendicular to a height 110 of the container interior 101, where the container interior 101 has a diameter less than the maximum diameter 111 of the container interior 101 throughout in the direction from the plane to the container opening 106. This is illustrated in the dotted guidelines included in FIG. 1.

    [0209] FIG. 2 shows a schematic diagram of a further container 100 of the invention. This container 100 also takes the form of a bottle. The bottle again comprises a container wall 102 that at least partly surrounds a container interior 101. The container wall 102 consists of a sequence of the following layers in superposed succession in the direction from the container interior 101 outward: an inner polymer layer 105 of EVOH, a container layer 103, and an outer polymer layer 104 of PET. The bottle has a container opening 106 in a mouth region 107. In addition, the mouth region 107 has been provided with a screw thread 201 for screwing on a lid as closure. The screw thread 201 has been formed here by the container layer 103 and coated with the outer polymer layer 104. The mouth region 107 is connected to a bottle body 109 via a bottle neck 108. The container layer 103 consists to an extent of 92.9% by weight, based on the total weight of the container layer 103, of fibers obtained from spruce wood as ground wood with an average fiber length of 1.5 mm. In addition, the container layer 103 has a moisture content of 7% by weight, based on the total weight of the container layer 103, and includes 0.1% by weight of additives, for example AKD and ASA, as hydrophobizing agents, and Eka ATC 4150 from Eka Chemicals as flow agent. The container layer 103 has an average thickness of 650 μm and is no thinner than 300 μm at any point in the container wall 102. In addition, the container layer 103 does not include any fold or crease at all. The inner polymer layer 105 has an average layer thickness of 80 μm. The outer polymer layer 104 has an average layer thickness of 50 μm. The container interior 101 has a maximum diameter 111 in a plane perpendicular to a height 110 of the container interior 101, where the container interior 1017 has a diameter less than the maximum diameter 111 of the container interior 101 in the direction from the plane to the container opening 106, i.e. in the region of the bottle neck 108 and the mouth region 107.

    [0210] FIG. 3 shows a schematic cross-sectional diagram of the container 100 of the invention from FIG. 2. It can be seen in FIG. 3 that the outer polymer layer 104 and the inner polymer layer 105 have each been coated over the full area of the container layer 103. In this case, the edge 301 of the container layer 103 which is at the top in FIG. 3 and runs around the container opening 106 has been coated with the outer polymer layer 104 but not with the inner polymer layer 105. Since this edge 301 for the use herein is not regarded either as facing or as being remote from the container interior 101, the inner polymer layer 105 is considered to have been fully coated.

    [0211] FIG. 4 shows a schematic cross-sectional diagram of a further container 100 of the invention. The container 100 in FIG. 4 has the design of the container 100 in FIG. 2. In a departure from the container 100 in FIG. 2, the outer polymer layer 104 here does not superimpose the container layer 103 completely, but only over about 20% of the surface area of the container layer 103 remote from the container interior 101. The container layer 103 here has especially been coated with the outer polymer layer 104 over the entire mouth region 107 of the container 100.

    [0212] FIG. 5 shows a schematic cross-sectional diagram of a further container 100 of the invention. The container 100 in FIG. 5 has the design of the container 100 in FIG. 2. In a departure from the container 100 in FIG. 2, the outer polymer layer 104 here does not superimpose the container layer 103 completely, but only over about 30% of the surface area of the container layer 103 remote from the container interior 101. The container layer 103 here has been partly coated with the outer polymer layer 104 only in the region of the bottle body 109. Such an outer polymer layer 104 is especially suitable for printing with information as to the container contents and promotional information.

    [0213] FIG. 6 shows a schematic cross-sectional diagram of a further container 100 of the invention. The container 100 in FIG. 6 has the design of the container 100 in FIG. 4. In a departure from the container 100 in FIG. 4, the outer polymer layer 104 here does not superimpose the container layer 103 completely. The container layer 103 here has been coated with the outer polymer layer 104 in the mouth region 107 only on its edge 301 that surrounds the container opening 106. Such an outer polymer layer 104 is particularly suitable as sealant for sealing of a film that covers the container opening 106 as a closure for the container 100. In addition, a lid may be screwed onto the container 100 as a further part of the closure.

    [0214] FIG. 7 shows a flow diagram of a method 700 of the invention for producing a container 100.

    [0215] The method 700 includes a method step a) 701: producing a container precursor 804. A container precursor wall 805 consisting of a container layer 103 is produced here from a composition comprising water to an extent of 99% by weight, a multitude of fibers to an extent of about 1% by weight, and additives such as hydrophobizing agents and flow agents to an extent of less than 0.02% by weight, based in each case on the total weight of the composition. The fibers are ground wood having an average fiber length of 1.5 mm. The composition is also called pulp. The composition is introduced into a negative mold 1001 of a container blank 1005 in order to obtain the container blank 1005. Details of the production of the container blank 1005 are elucidated in connection with FIG. 10. This container blank 1005 is hot-pressed in a hot pressing device 1100 with a negative mold 1101 of the container precursor 804 in order to obtain a container precursor 804. Details of the hot pressing are described for FIGS. 11 to 16. In the hot pressing, the container layer 103 is dried only to such an extent that it does not go below a minimum moisture content of 5% by weight, based on the weight of the container layer 103. The container precursor 804 thus obtained is not dried further, and so the moisture content does not go below the aforementioned minimum moisture content at any time. The container precursor wall 805 surrounds a container precursor interior 806, except for a container precursor opening. In a method step b) 702 of the method 700, the container layer 103 is coated with a first polymer composition on its side remote from the container interior 806. The container layer 103 here has a moisture content of 7% by weight. The coating with the first polymer composition is effected as a powder coating operation.

    [0216] FIG. 8 shows a schematic diagram of an apparatus 800 according to the invention. This comprises a holding device 801 comprising a shaped body 802 arranged and designed so as to hold a container precursor 804. The container precursor 804 comprises a container precursor wall 805 that at least partly surrounds a container precursor interior 806. The container precursor wall 805 consists of a container layer 103 and has a container precursor opening 810. The container layer 103 consists to an extent of 92.5% by weight, based on the total weight of the container layer 103, of fibers in the form of ground wood. The container precursor interior 806 has a maximum diameter in a plane perpendicular to a height of the container precursor interior, and a diameter less than the maximum diameter of the container precursor interior 806 at least in sections in the direction from the plane to the container precursor opening 810. The shaped body 802 consists of a metal and is composed of half-shells. In addition, the shaped body 802 is grounded and mounted so as to be rotatable about an axis 807. The holding device 801 also includes a drive unit (not shown) arranged and set up to rotate the shaped body 802 about the axis 807 at 1500 revolutions per minute. The shaped body 802 is configured in the form of a cup for receiving the container precursor 804, such that the shaped body 802 partly surrounds the container precursor 804. The container precursor wall 805 of the container precursor 804 accommodated in the shaped body 802 as shown is contacted here with the grounded shaped body 802 over 100% of its surface area remote from the container precursor interior 806. The apparatus 800 further includes a release device 803 arranged and designed so as to release a polymer composition in such a way that the container layer 103 is at least partly superimposed by the polymer composition. The release device 803 is designed here as a spray lance with a multitude of nozzles 808. Multiple nozzles 808 here are arranged on an end face of the lance, and a slot-shaped nozzles 808 that runs around a shell surface of the lance on the shell surface. This lance is designed to atomize a powder composed of a multitude of electrically charged polymer particles via the nozzles 808 in order to obtain a very homogeneous cloud of powder. The lance is arranged and designed so as to be movable relative to the shaped body 802, such that the lance can be introduced at least partly into the container precursor interior 106 of the container precursor 804 held by the shaped body 802. The lance here is arranged and designed so as to be movable in a direction in which the container precursor interior 806 has a dimension 809. The lance is arranged and designed so as to be movable such that it can be introduced into the container precursor interior 806 to an extent of 90% of the dimension 809. In addition, the holding device 801 and the release device 803 are arranged and designed to coat the container layer 103 completely on its surface facing the container precursor interior 806 with the polymer composition. In addition, the apparatus 800 includes a charging device (not shown) arranged and designed for electrically negatively charging the powder as polymer composition by applying a high voltage to the end face of the lance. In this way, the powder can be electrically charged relative to the grounded shaped body 802. The apparatus 800 is designed for powder coating of the container precursor 804 with the polymer composition on its surface facing the container precursor interior 806.

    [0217] FIG. 9 shows a flow diagram of a method 900 of the invention for filling and closing a container 100. In a method step I) 901, the container 100 of FIG. 6 is provided. The subsequent method steps II) 902 and III) 903 are conducted in a filling machine. In method step II) 902, the container 100 is filled with a smoothie through its opening 106. In method step III) 903, the container thus filled is closed. For this purpose, an aluminum foil is sealed over the container opening 106 by heat-sealing using the outer polymer layer 104 and the inner polymer layer 105 as sealant.

    [0218] FIG. 10 shows a scheme for production of a container blank 1005. First of all, a composition that is composed as specified for FIG. 7 is provided. The composition is also referred to as pulp. In addition, a negative mold 1001 of the container blank 1005 is provided. The negative mold 1001 includes a mold wall 1003 partly surrounding a mold interior 1002. The mold wall 1003 partly surrounds the mold interior 1002 here in that the negative mold 1001 includes a mold opening 1006 that connects the mold interior 1002 to an environment of the negative mold 1001. The mold interior 1002 has a maximum diameter in a plane perpendicular to a height of the mold interior 1002, with the mold interior 1002 having a diameter less than the maximum diameter of the mold interior 1002 throughout in the direction from the plane to the mold opening 1006, meaning that the mold interior 1002 narrows from the plane of the maximum diameter toward the mold opening 1006. The mold wall 1003 has a multitude of openings 1004. The size of the openings 1004 has been chosen such that the mold wall 1003 is permeable to the water from the pulp, but not the fibers from the pulp that have an average fiber length of 1.5 mm. The construction of the mold wall 1003 is described in detail in connection with FIG. 17. For production of the container blank 1005, a first portion of the composition is introduced into the negative mold 1001. For this purpose, the first portion of the pulp flows through the mold opening 1006 into the mold interior 1002. Concurrently therewith, the pulp flowing in meets the inside of the mold wall 1003, and the water from the first portion partly passes through the openings 1004 and hence is removed again from the first mold interior 1002. This is supported by a reduced pressure applied to the mold wall 1003 from the outside. In this regard, the arrows in FIG. 10 show the flow of the water. In the aforementioned process steps, the first portion does not have a flow rate of more than 200 mm/s at any point in the mold interior 1002. While the water from the first portion of the pulp partly leaves the mold interior 1002 again, the fibers from the first portion cannot pass through the mold wall 1003 through the openings 1004. As a result, the fibers are deposited on the side of the mold wall 1003 facing the mold interior 1002. In order to further dewater the deposited and partly dewatered pulp, compressed air is introduced into the mold interior 1002, such that the pressure in the mold interior 1002 is increased and the fibers with the remaining water are pressed against the mold wall 1003 from the inside and hence a further proportion of the water is pressed out of the mold interior 1002. Once the compressed air has been released again, a further portion of the pulp flows into the mold interior 1002. Analogously to the above process steps, the pulp from the further portion flowing in meets the inside of the partly dewatered pulp from the first portion that has been deposited on the mold wall 1003. A portion of the water from the further portion flows here through the partly dewatered pulp from the first portion and through the openings 1004, as a result of which part of the water is removed again from the mold interior 1002. This is again supported by the reduced pressure applied to the mold wall 1003 from the outside. The further portion here does not have a flow rate of more than 200 mm/s at any point in the mold interior 1002. In order to further dewater the deposited and partly dewatered pulp from the first and further portions, compressed air is again introduced into the mold interior 1002, such that the pressure in the mold interior 1002 is increased once more and the fibers from the first and further portions with the remaining water are pressed against the mold wall 1003 from the inside and hence a further proportion of the water is pressed out of the mold interior 1002. Since the negative mold 1001 is designed as a negative mold of the container blank 1005, the latter is obtained as a result. The container blank 1005 consists of the partly dewatered pulp and already has the shape of a bottle. Consequently, the container blank 1005 has a blank wall that partly surrounds a blank interior. The blank wall has an average density of 0.2 g/cm.sup.3. The blank wall has a blank opening, where the blank interior has a maximum diameter in a plane perpendicular to a height of the blank interior, where the blank interior has a diameter less than the maximum diameter of the blank interior throughout in the direction from the plane to the blank opening. The height of the blank interior here is a greatest dimension of the blank interior in any Cartesian spatial direction and extends from the blank opening to a section of the blank wall opposite the blank opening that is a base of the container blank. The region of the blank wall that forms the blank opening is referred to as mouth region. Thereafter, the negative mold 1001 consisting of half-shells is opened in order to demold the container blank 1005 obtained.

    [0219] FIG. 11 shows a scheme for production of a container precursor 804 by hot pressing in a hot pressing device 1100 from the above container blank 1005. For this purpose, the container blank 1005 is introduced into a negative mold 1101 of the container precursor 804 as part of the hot pressing device 1100. For this purpose, the negative mold 1101 has been constructed from half-shells. The negative mold 1101 includes a mold wall 1103 partly surrounding a mold interior 1102. The mold wall 1103 is in porous form and accordingly has a multitude of openings 1104, where the openings 1104 are pores. The size of the pores has been chosen such that the mold wall 1103 is permeable to the water present in the blank wall, but not to the fibers. In addition, the hot pressing device includes a shaping tool 1105 comprising a hollow body 1106. This hollow body 1106 has an elastically deformable wall. Shaping of the container blank 1005 in the mold interior 1102 of the negative mold 1101 gives the container precursor 804 from the container blank 1005. The container precursor 804 comprises a container precursor wall 805 that partly surrounds a container precursor interior 806. This consists here of a container layer 103 which is obtained from the blank wall. The container layer 103 has an average density of 0.75 g/cm.sup.3. Details of the hot pressing in the hot pressing apparatus are shown in FIGS. 12 to 16 and elucidated with regard thereto. FIGS. 12 to 16 should be viewed here in a time sequence.

    [0220] FIG. 12 shows a further scheme for production of the container precursor 804. This shows a section through the heating device 1100 with the negative mold 1101 of the container precursor 804 and the shaping tool 1105 with the hollow body 1106. The container blank 1005 to be pressed is in the mold interior 1102. The shaping tool 1105 comprises a circular outer ring 1201 made of aluminum and a circular inner ring 1202 made of silicone. The inner ring 1202 is concentrically within the outer ring 1201 and arranged so as to be elastically deformable with respect thereto.

    [0221] FIG. 13 shows a further scheme for production of the container precursor 804. By comparison with FIG. 12, this shows that the shaping tool 1105 with the hollow body 1106 is moved in a first direction 1301. As a result, the hollow body 1106 is introduced further into the blank interior. In addition, the shaping tool 1105 is in contact with the container blank 1005 in its mouth region. The contacting of the mouth region with the shaping tool 1105 includes accommodating of the blank wall in the mouth region 1202 between the outer ring 1201 and the inner ring 1202 of the shaping tool 1105.

    [0222] FIG. 14 shows a further scheme for production of the container precursor 804. By comparison with FIG. 13, the shaping tool 1105 has been moved here further in the first direction 1301, such that the shaping tool 1105 grips the negative mold 1101 which is closed. By virtue of this movement, the shaping tool 1105 grips the mouth region of the container blank 1005 such that it presses the blank wall in the first direction 1301 along a length of the container precursor 1005. This reduces the height of the container blank 1005. At the same time, the shaping tool 1105 grips the mouth region of the container blank 1005 such that the blank wall in the mouth region is pressed in a further direction 1401. The further direction 1401 is arranged radially here, i.e. in a plane perpendicular to the height of the container blank 1005. In FIG. 14, the mouth region of the container blank 1005 has already been pressed between the outer ring 1201 and the inner ring 1202 and hence obtained by shaping of the mouth region of the container precursor 804. It can also be seen that the outer ring 1201 surrounds the blank wall in the mouth region of the container blank 1005 along an outer circumference of the mouth region. In addition, the inner ring 1202 engages with the blank interior and contacts the blank wall in the mouth region of the container blank 1005 along an inner circumference of the mouth region of the container blank 1005.

    [0223] FIG. 15 shows a further scheme for production of the container precursor 804. By comparison with FIG. 14, oil at 180° C. was introduced here into the hollow body 1106, such that the elastically deformable wall thereof has been deformed to such a degree that it presses the blank wall against the mold wall 1101 from the inside. This affords the container layer 103 that forms the container precursor wall 805, and hence the container precursor 804. The above-described to hot pressing gives the container layer 103 its minimum moisture content of 5% by weight.

    [0224] FIG. 16 shows a further scheme for production of the container precursor 804. Here, proceeding from FIG. 15, the oil was sucked back out of the hollow body 1106 and the latter is removed from the mold interior 1102, such that the container precursor 804 can be demolded from the negative mold 1101 by opening the half-shells.

    [0225] FIG. 17 shows a photograph of a half-shell 1700 of the negative mold 1001 of the container blank 1005 in FIG. 10. The half-shell 1700 consists of a plastic carrier 1701 with a multitude of holes. A sieve mold 1702 is to be inserted into this plastic carrier 1701. The sieve mold 1702 forms the surface of the mold wall 1003 on which the fibers of the pulp are deposited in the production of the container blank 1005.

    LIST OF REFERENCE NUMERALS

    [0226] 100 container of the invention [0227] 101 container interior [0228] 102 container wall [0229] 103 container layer [0230] 104 outer polymer layer [0231] 105 inner polymer layer [0232] 106 container opening [0233] 107 mouth region [0234] 108 bottle neck [0235] 109 bottle body [0236] 110 height of the container interior [0237] 111 maximum diameter of the container interior [0238] 201 screw thread [0239] 301 edge [0240] 700 method of the invention for producing a container [0241] 701 method step a) [0242] 702 method step b) [0243] 800 apparatus of the invention [0244] 801 holding device [0245] 802 shaped body [0246] 803 release device [0247] 804 container precursor [0248] 805 container precursor wall [0249] 806 container precursor interior [0250] 807 axis [0251] 808 nozzle [0252] 809 dimension [0253] 810 container precursor opening [0254] 900 method of the invention for filling and closing a container [0255] 901 method step I) [0256] 902 method step II) [0257] 903 method step III) [0258] 1001 negative mold of the container blank [0259] 1002 mold interior of the negative mold of the container blank [0260] 1003 mold wall of the negative mold of the container blank [0261] 1004 opening of a multitude of openings in the mold wall of the negative mold of the container blank [0262] 1005 container blank [0263] 1006 mold opening of the negative mold of the container blank [0264] 1100 hot pressing device [0265] 1101 negative mold of the container precursor [0266] 1102 mold interior of the negative mold of the container precursor [0267] 1103 mold wall of the negative mold of the container precursor [0268] 1104 opening of a multitude of openings in the mold wall of the negative mold of the container precursor [0269] 1105 shaping-tool [0270] 1106 hollow body [0271] 1201 outer ring [0272] 1202 inner ring [0273] 1301 first direction [0274] 1401 further direction [0275] 1700 half-shell of the negative mold of the container blank [0276] 1701 plastic carrier [0277] 1702 sieve mold