EP3865422A1 - Packaging moulding, method for its production and packaging container - Google Patents

Abstract

A molded packaging part comprising a molded body which comprises a vegetable filler and a binding agent, the vegetable filler being present in the molded body in a uniformly distributed manner and being held in shape by the binding agent. The filler is provided essentially by parts of plants which have cavities resulting from plant growth, the cavities being essentially not filled by the binding agent, so that the shaped body is essentially porous. The packaging container according to the invention comprises such a packaging molding and an outer packaging which surrounds the packaging molding. The inventive method for producing such a packaging molding comprising wetting plant parts which have cavities resulting from plant growth with a binder, filling a mold with the wetted plant parts and removing the packaging molding.

Description

The present invention relates to a packaging molding comprising at least one molding which comprises at least one vegetable filler and at least one binding agent. The vegetable filler is essentially evenly distributed in the molding and is kept in shape by the binding agent. The present invention also relates to a packaging container with at least one such molded packaging part and a method for producing such a molded packaging part.

Packaging has an important protective function. Products must be protected from mechanical damage, particularly during transport and storage. For this purpose, various cushioning materials are used, which are packed together with the object to be protected in an outer packaging, for example a cardboard box. These can be roughly divided into three areas: bulk, large-volume, non-positive-locking cushions and positive-locking cushions or molded packaging parts.

Chips made of expanded polystyrene (EPS) or based on starch are often used as bulk materials. Overall, packaging chips are inexpensive to manufacture and can be used flexibly in the packaging process. However, they are very uncomfortable when opening a package, since the chips usually fall out of the package when the packaged goods are removed and make it more difficult to remove the product (object to be protected). In addition, in order to prevent the object to be protected from slipping, essentially the entire cavity in the packaging must be filled with the chips, which creates a large volume of waste. The disposal routes differ depending on the raw material used, as EPS, unlike starch chips, is not biodegradable. However, the differentiation is often not possible for the consumer, which leads to a large number of incorrect packaging material being thrown in during disposal. Therefore, both variants cannot be regarded as environmentally friendly packaging solutions.

Large-volume, non-interlocking pads can be made from a variety of materials. The most important representatives here are, on the one hand, foil cushions, air cushion foils and paper cushions, as well as sheet materials made of EPS or other foamed plastics.

Cushions of this type generally only insufficiently enclose the packaged objects to be protected and usually do not offer good transport protection for the products. In terms of environmental friendliness, the materials mentioned are generally considered recyclable (with the exception of the foamed panels). Foil cushions or air cushion foils are usually made of polyethylene and thus produced on the basis of mineral oil. Therefore, in terms of resource conservation, this material is to be classified as unsustainable.

For paper cushions, paper is delivered in rolls and crumpled up with paper cushioning machines during the packing operation. A comparatively large amount of cushioning material is necessary for good cushioning properties. The paper cushions are made from recycled paper. Although paper is considered to be easily recyclable, both paper production and paper recycling are associated with high water and energy requirements and the use of fresh fibers from wood.

Form-fitting cushioning materials are usually designed as molded parts made of expanded polystyrene. In addition, corrugated cardboard inserts are increasingly being used. For the latter, blanks are made, which are then folded and wrapped, creating three-dimensional holding systems for the objects to be protected. With a suitable construction of the winding, large cavities are enclosed, as a result of which the object to be protected is fixed in the packaging with relatively little use of material. However, the required cushioning properties for some products, for example filled glass bottles, cannot be achieved in this way. Therefore, EPS upholstery continues to determine the market. The advantage of the EPS molded parts is a very good protective effect combined with a low transport weight of the packaging material. The molded parts provide targeted protection the endangered areas of the packaged goods and their elasticity can be adapted to the requirements of the packaged goods. The decisive disadvantage of molded packaging parts made of EPS cushioning, however, lies in the classification as non-recyclable material and their manufacture from petrochemical raw materials. EPS is therefore a burden for the environment and should therefore be substituted as a packaging material if possible.

In view of the problems of the prior art outlined, it is the object of the present invention to provide an environmentally friendly alternative to conventional cushioning materials which can be packaged e.g. B. adequately protects against transport damage in an outer packaging.

This object is achieved by a molded packaging part with the features of claim 1, by packaging containers with the features of claim 11 and by a method with the features of claim 13. Preferred developments of the invention are the subject matter of the subclaims. Further advantages and features of the present inventions emerge from the general description and the description of the exemplary embodiment.
The packaging molding according to the invention comprises at least one molding which comprises at least one vegetable filler and at least one binding agent. The vegetable filler is essentially evenly distributed in the molding and is kept in shape by the binding agent. The filler is essentially provided by parts of plants which have cavities resulting from plant growth, the cavities being essentially not filled by the binding agent, so that the shaped body is essentially porous.

The fact that the vegetable filler is kept in shape by the binder means in particular that the filler is wetted with the binder or embedded in it, so that a stable and essentially rigid structure is created which forms the shaped body.

The cavities of the plant parts resulting from the plant growth are in particular essentially closed cavities. This is to be understood in particular as meaning that a completely closed and / or essentially closed cavity is present, into which the binding agent cannot penetrate or can penetrate only with difficulty or to a limited extent. Depending on the configuration, the cavity can also be essentially tubular, in which case z. B. by choosing a suitable amount of the binder used, the penetration into such cavities or tubular structures can be limited.

The fact that the vegetable filler is essentially provided by plant parts, also called particles in the application, means in particular that predominantly intact plant parts such as husks and / or also stem sections and / or other plant parts are used.

In particular, there is no provision for the vegetable filler to be provided predominantly by heavily comminuted plant parts, in particular not by ground or shredded plant parts. In particular, plant parts should predominantly be used which have the cavity described above, so that binding agent does not penetrate into these cavities and these are still retained in the finished molded packaging part.

Depending on the configuration, impurities and also defective or comminuted plant parts can of course be present in the packaging molding or the molding. However, the use of intact plant parts with a corresponding cavity is essentially preferred.

Because essentially no binder penetrates into the cavities of the plant parts, this cavity is also retained in the finished molded packaging part or in the finished molded body, so that the cavities in the molded body produce a certain porosity in the molded packaging part.

Here, porous means in particular that at least the cavities of the plant parts are essentially retained, and depending on the design the binder can have cavities or air inclusions in order to further increase the porosity.

The binder is particularly preferably biodegradable. In this way, a particularly ecologically acceptable molded packaging part can be produced. In particular, the entire molded packaging part is free of non-biodegradable substances. This provides sustainable and ecologically valuable packaging or such a molded packaging part.

Depending on the configuration, at least one additive can preferably also be added. Under additives are meant according to this application additives, such as. B. celluloses and / or glycerine, which improve the properties of the packaging molding. Glycerine is a humectant which, due to the water attraction of the alcohol, serves as a humectant and protects the binding agent from drying out. In the case of bio-plastics based on cellulose or starch in particular, it is added to the brittle materials as a plasticizer.

The molded packaging part according to the invention offers many advantages. A considerable advantage is that a biological and preferably biodegradable molded packaging part is made available by using a vegetable filler.

Because plant parts are used with cavities resulting from plant growth, a certain porosity of the molded body of the packaging molded part is achieved. This porosity means that the molded body has a force-absorbing or force-cushioning effect. In the case of the husks, the naturally grown cavities result from several leaflets, which are arranged in an overlapping, goblet-like manner and create this cavity. In the event of impact and pressure from outside, the individual leaflets can flexibly move out of the cavity / give in a little and then move back into their original position. Due to the porosity of the molded body, resulting from the cavities, a particularly good damping of the forces can be achieved. Likewise arise thus insulating properties. For example, protection can be achieved by the molded packaging part similar to the effectiveness of Styrofoam.

The plant parts are preferably provided by grain husks and / or sections of stalks. It is particularly preferred that the plant parts are made available by whole or intact or complete husks of grain, so that a particularly closed cavity is present, into which no binding agent or only a small amount of binding agent can penetrate. A particularly good porosity can be achieved in this way. When using stalk sections, for example straws, grain stalks, reeds or also stalk sections of suitable grasses, these are in particular 1 cm to 2 cm long. In this way, a particularly good shape of the shaped body can be achieved, with such long home sections also being able to prevent the cavities of the stalk sections from filling up too much with binding agent. Good porosity can also be achieved in this way. Depending on the design, however, shells of nuts and / or legumes can also be used as plant parts.

Particularly preferably, the parts of the plant are essentially uniformly wetted by the binding agent and / or embedded essentially uniformly in the binding agent. In this way, a particularly stable molded body can be made available which has particularly suitable force-absorbing and protective properties.

In expedient developments, the binding agent comprises agar and / or casein and / or at least one starch material. The use of corn and / or potato starch is particularly preferred as the starch material. Depending on the configuration, the use of alginate and / or methyl cellulose and / or hydroxypropyl cellulose (Klucel) can also be provided.

The binder preferably has air inclusions at least in sections. Such air inclusions further increase the porosity of the molded body. In this case, such air inclusions can in particular be essentially uniform in be provided to the binder. Such air inclusions can be achieved, for example, by boiling, mechanical whipping and / or foaming of the binding agent, for example also using surfactants, before the plant parts are wetted. In addition to controlling the porosity, the introduction of air pockets can reduce the weight of the molded body or the molded packaging part.

The binder particularly preferably comprises reinforcing fibers. Cellulose fibers and / or similar fibers, for example, can be introduced into the binder before the binder is applied to the plant parts. Such reinforcing fibers can in particular be made from recycled material in order to provide a particularly ecologically valuable packaging molding.

In expedient developments, the volume fraction of the binder is between 6 and 65%, preferably between 10 and 35, particularly preferably between 10 and 25%, of the volume fraction of the filler; depending on the configuration, volumetric fractions of 5-10% can also be used appropriately. The less binding agent is provided, the greater the volume fraction of the plant parts, whereby a particularly large number of cavities are provided within the molded body, so that a particularly large porosity is achieved, whereby a particularly good protective effect or cushioning property is achieved.

The mass fraction of the plant parts in the molded packaging part is preferably greater than 40%, preferably greater than 45% and in particular greater than 50%. As already stated above, a particularly large proportion of plant parts or plant filler is preferred. The mass fraction relates in particular to the finished product, i.e. the dried product. Then the water content in particular has dried off from the binder.

The shaped body particularly preferably has at least one modified surface. In particular, a refinement is used under a modified surface understood, for example the provision of moisture protection and / or scratch protection, a coating and / or printing on the coating. Depending on the design and application, any other known refinement of the surface can be provided on the molded body.

The molded body preferably has at least one trough and / or recess configured in the manner of a chamber. In this case, the molded body can in particular have a receptacle for a good or an object to be picked up, which preferably receives the product to be protected in an essentially form-fitting manner. For example, the contour or the recess can be adapted to a bottle shape or the like.

The packaging container according to the invention comprises at least one molded packaging part, as has been described above, and at least one outer packaging which at least partially surrounds the molded packaging part.

In this case, such an outer packaging can in particular comprise a cardboard or a cardboard box or a cardboard box or be provided thereby. The molded part with an object to be protected can be pushed or inserted into this outer packaging and preferably closed. Depending on the design, the outer packaging can completely enclose the molded packaging part or, depending on the design, also several molded packaging parts, and thus also reinforce particularly good protection against damage.

The packaging container according to the invention also has the advantages as already described above for the molded packaging part.

An object to be protected can preferably only assume a position spaced apart from a wall of the outer packaging without removing the molded packaging part. In this way, particularly secure packaging can be achieved for an object to be protected.

The method according to the invention is suitable for producing a molded packaging part as described above. The method comprises the following steps in a suitable number and sequence. Plant parts which have cavities resulting from plant growth are wetted with a binding agent. A mold is filled with the wetted parts of the plant. The molded packaging part is removed from the mold.

Depending on the configuration, further process steps can advantageously be used in order to produce a desired molded body or a desired molded packaging part. In particular, a compaction step can also take place, for example, but care should be taken that the compaction is not too strong, so that the cavities of the plant parts continue to exist. If the compression is so strong that the cavities are destroyed or the plant parts are completely compressed, the positive properties of the porosity that are essential for the product are lost.

The method according to the invention also offers the advantages as already described above for the molded packaging part. In particular, the method according to the invention can be used to produce a molded packaging part which has the properties already mentioned above.

The method preferably comprises the following step at a suitable point. The binder is boiled up and / or foamed. In this case, by boiling or foaming the binder, in particular using one or more surfactants, air pockets can be introduced into the binder. The binder treated in this way is applied to the parts of the plant and the air pockets remain when the binder hardens. In this way, an even greater porosity can be provided, which brings about the protective properties already described above.

The addition of cellulose fibers to the foamed binder strengthens the cohesion between the plant parts in the porous structure of the dried binder.

The method according to the invention particularly preferably comprises at least one of the following steps at a suitable point in a suitable number. The molded packaging part is dried after and / or during removal from the mold. Depending on the configuration, drying can take place before removal, that is to say in the form. Depending on the configuration, the surface of the shaped body can also be modified. As already described above, modifying is understood here to mean, in particular, a refinement of the surface. The finishing can be done, for example, by applying moisture protection, applying a coating and / or a color and / or a print.

According to one aspect of the present invention, a packaging molding is provided which has a disperse filler and a binder. The disperse filler has plant parts or plant particles which have cavities resulting from plant growth and, depending on the configuration, concave recesses.

The plant parts or particles are preferably not loose, but rather connected to one another by means of the binding agent to form the packaging molding. The cavities or the concave recesses of the particles ensure high porosity.

In all of the configurations it is preferred that the dosage of the binding agent is selected in such a way that the space between the plant parts or particles is not completely filled with binding agent. This ensures that the porosity is further increased. A high porosity results in a low weight and good damping properties.

The volume fraction of the binder can advantageously be between 6% and 65%, preferably between 10% and 35%, particularly preferably between 15% and 25% % of the volume fraction of the filler in order to achieve a good compromise between the resulting porosity and inherent strength of the packaging molding. Volume ratios (particle: binder) of 10: 1 to 1.6: 1, preferably 7: 1 to 3: 1, have proven to be particularly advantageous when using a system of cereal husks and industrial starch (commercially available, for example, under the name Sobex 222 from from the company Südstarke GmbH) as a binder, volume ratios (particle: binder) of 16: 1 to 4: 1, preferably 8: 1 to 6: 1, as particularly advantageous when using a system of cereal husks and agar binders.

The fact that the cavities or the concave recesses originate from plant growth means that the plant parts or particles do not first have to be provided with a cavity and / or formed concave by a technical process.

Advantageously suitable plant parts or particles can be, for example, cut stalks made of straw or reed, (parts of) nutshells, shells of legumes or the like.

According to a particularly preferred embodiment, the disperse filler has cereal husks (cover sheets of cereal grains) as plant parts or particles. In grain production, husks are produced in large quantities as residues and are not used in the food industry. There is therefore no competition for arable land for food or even a direct use of food as a raw material. Today, large quantities of husks are pressed into pellets in the peeling mill, which are then used as fuel or as bedding material in stables. Likewise, large parts are only composted. Only a very cleaned portion is used as a filling material for pillows. This means that a raw material is preferably used which, on the one hand, is produced anyway, but on the other hand is currently only partially used for economic purposes. The husks usually do not need to be pretreated before use. The main energy expenditure is limited to the transport of the husks.

Millet or spelled husks, for example, can be used particularly advantageously, depending on the intended use. The millet has a very small, rounded husk, which is suitable for very good imaging accuracy in molded bodies. In comparison, spelled husks are significantly larger and elongated in shape. The individual husks act like small feathers and can thus contribute to a very good protective effect. Mixtures of two or more of the named and / or similar types of particles are also advantageously possible, although the use of particles of the same type usually means that a higher porosity can be expected due to a narrower particle size distribution.

Plant parts or plant particles with concave recesses or cavities resulting from plant growth, such as, for example, husks, have the advantage that they are usually available as waste materials in a cost-effective, resource-saving and thus environmentally friendly manner. They also bind carbon dioxide and make it possible to make packaging moldings according to the invention easy to dispose of.

The mass fraction of the particles in the molded packaging part can be selected to be greater than 50%, particularly advantageously for resource-saving production of the molded packaging part.

The environmentally friendly disposability of molded pack parts according to the invention is preferably increased in that a biodegradable binder is selected. The binding agent can advantageously comprise agar and / or casein and / or a starch material, for example potato starches (e.g., Sobex), paste, or corn starches. In particular, the use of agar as a binding agent can lead to solid and rigid, but nevertheless shock-absorbing bodies, which are also largely moisture-resistant. A molded packaging part is particularly preferably free from non-biodegradable substances.

According to an advantageous development of the invention, the molded packaging part has a modified surface, for example by being wrapped in paper, preferably recycled paper, or by coating, in particular by means of a biodegradable coating agent. Therefor In particular, the above-mentioned binders, with which surfaces can be sprayed or coated, or in which the molded part can be dipped, are also suitable. The surface refinement can also take place with the shaping. Flocking and the application of bio-based rubber-like layers are also advantageously possible. Modified surfaces can be made with less roughness or unevenness. In this way, it is possible, for example, to prevent packaged goods with complicated surface structures from getting caught in the pores of the molded packaging part or from scratching sensitive (e.g. polished or lacquered) surfaces. In addition, surface modification can prevent individual particles from loosening too easily from the molded packaging part.

According to a particularly preferred embodiment, the molded packaging part has at least one trough-like or chamber-like recess. What is meant here is a macroscopic cutout with at least 10 times, preferably at least 100 times the volume of the mean volume of the concave cutouts of the particles or the cavities of the plant parts, i.e. an area in which material is deliberately left out during the production of the molded part or removed. Advantageously, chamber-like or trough-like recesses, depending on the intended use, can have simple geometric basic shapes such as hollow cuboids, polyhedral hollow honeycombs or parts of hollow cones, truncated hollow cones, hollow cylinders, hollow spheres, or they can be designed as more complex shapes with locally different radii of curvature in different spatial directions. Such simple or more complex recesses can, depending on their design and arrangement, advantageously serve to accommodate packaged goods in such a way that they do not slip or tip over, or to keep several parts of the packaged goods away from one another, for example to prevent them from being damaged by hitting or rubbing against each other . Furthermore, such recesses can serve to reduce the weight of the packaging molding and the raw material costs for its production.

According to a further aspect of the present invention, a packaging container is provided which has a molded packaging part according to one of the above-mentioned embodiments with a chamber-like or trough-like recess and an object to be protected, wherein an outer contour of the object to be protected with an inner contour of the chamber or Trough-like recess is engaged. In this way, the object can be secured against tipping or slipping.

According to a further aspect of the present invention, a packaging container is provided which has a packaging molding according to one of the above-mentioned embodiments, an object to be protected and an outer packaging which at least partially surrounds the object to be protected and the packaging molding. The outer packaging can be designed, for example, as a cardboard box, wooden box, metal box, plastic box or the like.

The packaging container is preferably designed in such a way that the object can only assume a position spaced apart from a wall of the outer packaging without removing the molded packaging part. In this way, the item is protected against damage caused by hitting the outer packaging.

According to a further aspect of the present invention, a method for producing a packaging molding is provided, comprising wetting vegetable particles which have concave recesses originating from plant growth with a binding agent, filling a mold with the wetted vegetable particles, and removing the wetted vegetable particles Particle-containing packaging molding from the mold. The above applies to the selection of the particles and the binding agent.

According to an advantageous development, the method further comprises: drying the packaging molding after and / or during removal from the mold. According to an advantageous development, the method further comprises: Modifying a surface of the molded packaging part. As stated above, this can be done, for example, by wrapping paper, preferably recycled paper, or by coating, in particular by means of a biodegradable coating agent. The binders already mentioned above are particularly suitable for this purpose. Modified surfaces can be made with less roughness or unevenness.

According to a further aspect of the present invention, a method for packaging an object to be protected is provided, comprising providing a packaging molding according to one of the embodiments described above and an outer packaging which has at least one wall defining an interior space for at least partially receiving the object and the molding, and placing the packaging molding and the article in the interior space in such a way that the article can only assume positions spaced apart from the wall without removing the packaging molding. In this way, the item is protected against damage caused by hitting the outer packaging. The outer packaging can be designed, for example, as a cardboard box, wooden box, metal box, plastic box or the like.

According to an advantageous development, the provision of the packaging molding comprises the above method according to the invention for producing a packaging molding.

In principle, every variant of the invention described or indicated in the context of the present application can be particularly advantageous, depending on the economic and technical conditions in the individual case. Unless stated otherwise, or as far as technically feasible in principle, individual features of the described embodiments can be exchanged as desired and / or combined with one another and with features known per se from the prior art.

Further advantages and features of the present invention emerge from the exemplary embodiment which is explained below with reference to the accompanying figures.

Fig. 1

eine rein schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Verpackungsformteils mit einem zu verpackenden Gegenstand in einer perspektivischen Ansicht;

Fig. 2

eine rein schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Verpackungsformteils in einer Schnittansicht von der Seite mit einer Detailvergrößerung;

Fig. 3

eine rein schematische Darstellung einer Spelze in einer Seitenansicht und einer Draufsicht;

Fig. 4

eine rein schematische Darstellung einer Spelze in einem Längsschnitt und einem Querschnitt;

Fig. 5

eine rein schematische Darstellung von Spelzen eingebettet in Bindemittel;

Fig. 6

eine rein schematische Darstellung einer Getreidespelze in einer perspektivischen Ansicht;

Fig. 7

eine rein schematische Darstellung einen geschnittenen Strohhalm in einer perspektivischen Ansicht;

Fig. 8

eine rein schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Verpackungsformteils in einer perspektivischen Ansicht;

Fig. 9

eine rein schematische seitliche Schnittansicht des Verpackungsformteils entlang der Schnittebene A-A in Figur 8;

Fig. 10

eine rein schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Verpackungsgebindes in einer Schnittansicht von der Seite; und.

Fig. 11-13

zeigen rein schematische Fließbilder von Verfahren zur Herstellung erfindungsgemäßer Verpackungsformteile.

In the figures show:

Fig. 1

a purely schematic representation of an embodiment of a packaging molding according to the invention with an object to be packaged in a perspective view;

Fig. 2

a purely schematic representation of an embodiment of a packaging molding according to the invention in a sectional view from the side with an enlarged detail;

Fig. 3

a purely schematic representation of a husk in a side view and a top view;

Fig. 4

a purely schematic representation of a husk in a longitudinal section and a cross section;

Fig. 5

a purely schematic representation of husks embedded in binder;

Fig. 6

a purely schematic representation of a cereal husk in a perspective view;

Fig. 7

a purely schematic representation of a cut straw in a perspective view;

Fig. 8

a purely schematic representation of an embodiment of a packaging molding according to the invention in a perspective view;

Fig. 9

a purely schematic lateral sectional view of the molded packaging part along the sectional plane AA in FIG Figure 8 ;

Fig. 10

a purely schematic representation of an embodiment of a packaging container according to the invention in a sectional view from the side; and.

Fig. 11-13

show purely schematic flow diagrams of processes for producing molded packaging parts according to the invention.

In Figure 1 a molded packaging part 1 according to the invention is shown purely schematically in a perspective view. The molded packaging part 1 here comprises a molded body 2 which is formed by vegetable filler 3 and binding agent, the vegetable filler 3 being held in shape by the binding agent 4.

In the exemplary embodiment shown here, the vegetable filler 3 is provided by plant parts 5, which have cavities 6 resulting from plant growth, so that the plant parts 5 or the vegetable filler 3 in conjunction with the binding agent 4 results in a substantially porous molded body 2.

Such a molded body 2 is used, for example, to protect or package objects such as bottles. For this purpose, in the exemplary embodiment shown, the molded body 2 has a recess 10 in the form of a bottle, a bottle 300 inserted into the molded body 2 or the recess 10 being indicated purely schematically.

Depending on the configuration, the packaging form part 1 can also be configured differently. Depending on the object to be picked up, differently shaped recesses 10 or also elevations or contours can be provided.

The molded packaging part 1 can, however, depending on the application and configuration, also be designed in the manner of a plate and / or cut into any desired sections, so that, for example, packaging chips are created. For this purpose z. B. larger moldings 2 are produced, which are then brought into the desired shape of the packaging molding 1. Here, for example, cubes, cuboids and / or spheres can be provided as a suitable shape. But it is also possible to choose other shapes. So then z. B: pourable molded packaging parts 1 are produced.

In the exemplary embodiment shown, the binding agent 4 is biodegradable. In this way, a particularly ecologically acceptable packaging form part can be produced. Depending on the configuration, the entire molded packaging part 1, as in the exemplary embodiment shown here, is free of non-biodegradable substances. In this way, particularly sustainable packaging is made available.

In the exemplary embodiment shown here, the molded body 2 has a modified surface 9. Moisture protection is provided here. Depending on the configuration, however, any finishing of the surface can be provided, in particular one or more coatings or also prints can be applied.

In Figure 2 is purely schematic that in Figure 1 Shown packaging molded part 1 shown in a sectional view from the side. Here, too, it can be seen that the molded body 2 is formed by vegetable filler 3 in conjunction with a binder 4. The recess 10 for a bottle 300 in the exemplary embodiment shown here is also shown here.

In the enlarged view in Figure 2 it can be seen that the vegetable filler 3 or the plant parts 5 lie relatively close to one another and thus give the molded body 3 its shape. The vegetable filler 3 or the plant parts 5 are kept in shape by the binding agent 4.

It is provided that as little binder as possible is used in order to have the largest possible proportion of plant parts 5. So can a particularly good one Protective effect can be achieved by the molded body 2 or the molded packaging part 1.

In the Figures 3 and 4 is shown purely schematically that cereal husks 7 can be used as plant parts 5 or plant filler 3. In Figure 3 A cereal husk 7 is shown in a side view and in a top view. The various husk leaves create a cavity 6 within the husk 7 after threshing, which is relatively closed by the arrangement of the husk leaves even after threshing, so that no binding agent 4 can penetrate into the cavity 6.

As a result, the cavity 6 is largely retained in the molded part 2, as a result of which an essentially porous molded body 2 is created which has particularly good protective properties.

In Figure 4 a cross-section and a longitudinal section through a cereal husk 7 are shown purely schematically. The cavity 6, which provides the porous properties of the molded body 2, is well known here.

In Figure 5 a possible arrangement of vegetable filler 3 in the molded body 2 of a molded packaging part 1 according to the invention is shown purely schematically. Here it is shown purely schematically on the basis of a few grain husks 7 or plant parts 5 in connection with binding agent 4 how a molded body 2 or a molded packaging part 1 can look. It should be noted that, for a particularly good protective effect, it is preferred that a relatively large proportion of vegetable filler 3 or plant parts 5 or here cereal furs 7 in terms of volume and mass is provided.

It is indicated here purely schematically that the binder 4 can also have air inclusions 13 which increase the porosity of the molded body 2 or the molded packaging part. These air inclusions 13 can be generated, for example, by heating, foaming and / or by mechanically striking the binding agent prior to application to the filler 3.

In addition, in Figure 5 indicated that reinforcing fibers 14 can be provided in the binder 4.

Figure 6 shows, purely schematically, a further embodiment of vegetable filler 3. In this way, the vegetable filler 5 is provided with a plant part 5 or a plant particle 11, which has a concave recess 12.

In Figure 7 is shown purely schematically that stalk sections 8 of suitable stalks, for example of grasses, cereals and / or also reeds, can be used as vegetable filler 3 or as plant parts 5. Such stalks 8 can in particular be about 1 cm to 2 cm long, so that a substantial part of the cavity 6 remains free even when wetting or embedding with binding agent.

In Figure 8 a further exemplary embodiment of a molded packaging part 1 according to the invention is shown in a perspective view. The packaging molding 1 shown here consists of spelled husks 7 and a biodegradable binder 4 such as corn starch. It has a trough-like recess 10 into which a bottle can be inserted as an object to be protected. The trough-like recess 10 is shaped in such a way that its contour can be brought into engagement with a bottle contour in such a way that the bottle is prevented from rolling away and / or slipping.

Figure 9 shows, purely schematically, a sectional view through the packaging molded part 1 according to FIG Figure 8 along the section plane AA.

In Figure 10 an exemplary embodiment of a packaging container 100 according to the invention is shown purely schematically in a sectional view. The packaging container 100 here comprises two molded packaging parts, each with a recess 10 each for receiving half a bottle 300, here with a cork 301. The bottle 300 is thus completely and securely enclosed by the two molded packaging parts 1.

The packaging container here also comprises an outer packaging 200, which is provided here by a cardboard box 201. Through the outer packaging the protection of the bottle is further improved. In addition, the two molded packaging parts 1 are held together.

To produce a packaging molding 1 according to the invention, in a first step husks 7 or other plant parts 5 or other plant particles 11 which have cavities 6 or concave recesses 12 resulting from plant growth are mixed with the binder 4, e.g. B. a vegetable adhesive wetted or enveloped.

The husk / binding agent or adhesive mixture is then conveyed into a mold 400 with a pump 401 or another conveying system. Depending on the desired properties of the molded packaging part 1, this takes place virtually without pressure for more porous, less rigid molded packaging parts 1, up to and including pressing in the mold 400 for denser and stronger molded packaging parts 1.

Such manufacturing processes can advantageously be carried out, for example, as shown schematically in one of the Figures 11 to 13 shown.

As in Fig. 11 illustrated, a stirred tank 402 can be used for wetting the husks 7 with the binding agent 4. First the binding agent 4 (for example starch with water) is prepared, then the husks 7 are added and mixed with the binding agent 4 by stirring. The mixture is then transferred into the molding tool or mold 400 by means of a pump 401.

Depending on the configuration, the binding agent 4 can also be boiled up and / or foamed when it is made up, depending on the desired property also with the addition of at least one surfactant. The foamy binder creates air inclusions in the binder 4 in the finished molded body 2 or packaging molding 1, which results in greater porosity.

The in Fig. 12 In the method outlined, a first stirred tank 402 is used to prepare the binding agent 4. The binder 4 is by means of a first Pump 401 is transferred into a second stirred tank 403, in which the husks 7 or other suitable particulate natural substances or plant parts 5 are, and mixed with them. This results in the wetting of the husks. The mixture is then transferred into the molding tool or mold 400 9 by means of a second pump 404.

The in Fig. 13 In the illustrated method, the husks 7 are placed in an extruder 405 and the binder 4 is added in the extruder and mixed with the husks 7. The mixture is conveyed into the molding tool or the mold 400 with the extruder 405.

The execution of the process depends to a certain extent on the binding agent used. For example, the adhesives paste and industrial starch can be mixed as binders with the help of cold water. The binder mixture swells as it is stirred. It can then be mixed with the husks at normal room temperature. Table potato starch and agar, on the other hand, are heated with water before they are mixed in order to create a jelly. The subsequent filling process should therefore take place as quickly as possible and with as little heat loss as possible, otherwise solidification can occur too early. As already stated above, the binding agent can also first be boiled or foamed in order to generate air inclusions in the binding agent 4.

List of reference symbols

1

Packaging molded part

2

Moldings

3

vegetable filler

4th

binder

5

Plant parts

6th

Cavities

7th

Cereal husks

8th

Stalk sections

9

modified surface

10

Recess

11

Particles

12th

concave recess

13th

Air entrapment

14th

Reinforcement fibers

100

Packaging container

200

Outer packaging

300

object

301

carton

400

shape

401

pump

402

boiler

403

boiler

404

pump

405

Extruder

Claims (15)

Packaging molded part (1), comprising at least one molded body (2) which comprises at least one vegetable filler (3) and at least one binder (4), the vegetable filler (3) being distributed essentially uniformly in the molded body (2) and from the binding agent (4) is kept in shape,
characterized,
that the vegetable filler (3) is essentially provided by plant parts (5) which have cavities (6) resulting from plant growth, the cavities (6) being essentially not filled by the binding agent (4), so that the molded body (2 ) is essentially porous. Packaging molding (1) according to claim 1, wherein the plant parts are provided by grain husks (7) and / or sections of stalks (8). Packaging molding (1) according to one of the preceding claims, wherein the plant parts (5) are substantially uniformly wetted by binding agent (4) and / or are embedded substantially uniformly in the binding agent (4). Packaging molding (1) according to one of the preceding claims, wherein the binding agent (4) comprises agar and / or casein and / or hydroxypropyl cellulose and / or a starch material. Packaging molding (1) according to one of the preceding claims, wherein the binding agent (4) has air inclusions (13) at least in sections. Packaging molding (1) according to one of the preceding claims, wherein the binding agent comprises reinforcing fibers (14). Packaging molding (1) according to one of the preceding claims, wherein the volume fraction of the binding agent (4) is between 6% and 65%, preferably between 10% and 35%, particularly preferably between 15% and 25% of the volume fraction of the vegetable filler (3). Packaging molding (1) according to one of the preceding claims, wherein the mass fraction of the plant parts (5) on the molding (2) is greater than 40%, in particular greater than 45% and preferably greater than 50%. Packaging molding (1) according to one of the preceding claims, wherein the molding (2) has a modified surface (9). Packaging molding (1) according to one of the preceding claims, wherein the molding has a trough-like and / or chamber-like recess (10) and / or a contour. Packaging container (100), comprising at least one packaging molding (1) according to one of Claims 1 to 10, and at least one outer packaging (200) which at least partially surrounds the packaging molding (1). Packaging container according to claim 11, wherein an object (300) received in the packaging molding (1) can only assume a position spaced apart from a wall of the outer packaging (200) without removing the packaging molding (1). Method for producing a packaging molding (1) according to one of Claims 1 to 10, comprising the following steps in a suitable sequence and number: - Wetting of plant parts (5) which have cavities (6) resulting from plant growth with at least one binding agent (4); - Filling a mold (400) with the wetted plant parts (5); - Removing the molded packaging part (1) from the mold (400). Method according to the preceding claim, comprising the following step at a suitable point: - Boiling and / or foaming of the binder (4). Method according to one of the two preceding claims, comprising at least one of the following steps at a suitable point: - drying the packaging molding (1) before, after and / or during removal from the mold (400); - Modifying at least one surface (7) of the molded body (2) of the molded packaging part (1).

Images