DE102019004989A1 - Dishcleanliness and method of sealing partially cooked food - Google Patents

Abstract

Crockery unit (1) such as a plate, for the packaging, transport and / or consumption of food (30), with a body (2) covered with a film (15), wherein between the film (15) and the body ( 2) an adhesive (21) is present in an adhesive area (8) to seal the crockery unit (1), characterized in that the film (15) comprises at least one sealing layer (15a) based on polyethylene, and that the crockery unit (1) consists at least partially of a ceramic material, andthat the adhesive (21) comprises at least one hotmelt adhesive and consists at least partially of thermoplastic rubber and the sealing layer (15a) of the film (15) with the ceramic material of the crockery unit (1) ) glued.

Description

The present invention relates to a tableware unit and in particular a plate for the packaging, transport and / or consumption of food and a method for sealing a tableware unit with a film. The crockery unit has a body which is or is covered with a film. An adhesive is present in an adhesive area between the film and the body in order to seal the dish unit to the film.

In the prior art, tableware units and also methods for sealing tableware units with food placed thereon have become known.

The unpublished DE 10 2018 000 407.5 the Applicant discloses a tableware unit with a body covered with a film, in which an adhesive for sealing the tableware unit is present in an adhesive area between the body and the film. The film and the crockery unit have such a surface tension that the adhesive at least predominantly adheres to the film when the film is removed. The crockery unit described in this publication functions satisfactorily. Most of the adhesive adheres to the film. However, it has been found that the reproducibility can still be improved for high and highest demands.

It is therefore the object of the present invention to provide a dish unit which has a body covered with a film and which provides an even more reliable function.

This object is achieved by a crockery unit with the features of claim 1. The method according to the invention is the subject matter of claim 14. Preferred developments of the invention are the subject matter of the subclaims. Further advantages and features of the invention emerge from the general description and from the description of the exemplary embodiments.

A crockery unit according to the invention is designed in particular as a plate and is used in particular for the packaging, transport and / or consumption of food. In particular, the crockery unit is used for the packaging, transport, preparation and later consumption of initially partially prepared meals that come to an end after a delivery. be prepared. The crockery unit has a body covered with a film, an adhesive being present between the film and the body in an adhesive area in order to seal the crockery unit. The crockery unit can in particular also be used for the preparation and / or preparation of dishes or components, for example of a menu course. The crockery unit comprises an in particular temperature-resistant body. The film comprises at least one sealing layer based on polyethylene (PE). The crockery unit consists at least partially of a ceramic material and in particular of a porcelain material. The adhesive comprises at least one pressure-sensitive hotmelt adhesive and consists at least in part of thermoplastic rubber. The sealing layer of the film is glued to the ceramic material of the dish unit.

The dish set according to the invention has many advantages. A considerable advantage is that the choice of the material of the dish unit and the film material as well as the adhesive result in a reliable and also effective sealing of the body with a film during transport. In addition, the sealing film can be peeled off the crockery unit without any special precautionary measures or without any special effort, without unsightly residues of the adhesive remaining on the crockery unit. This also creates a visually pleasant overall impression. Overall, an even higher level of reliability is achieved in the sealing and in the removal of the adhesive together with the film than in the above-mentioned and as yet unpublished prior art.

The adhesive is selected so that when the foil is torn off, the adhesive remains at least predominantly to adhere to the foil. The formulation that the adhesive at least predominantly adheres to the film when the film is removed from the dish unit is to be understood in the context of the present invention that at least 90% or at least 95% or at least 97.5% of the mass of the adhesive sticks to the film when removing the film. In particular, at least 99% or more of the mass of the adhesive remains on the film when the film is removed. The figures mentioned apply to the regular case. It cannot be ruled out that, for example, in one out of 1.0, 20, 50 or 100 cases, a larger percentage of the adhesive will remain on the dish unit. However, when the film is removed, the adhesive regularly loosens largely or practically completely from the tableware unit, so that no further cleaning of the adhesive area of the tableware unit is necessary before the ready-prepared food is consumed. In particular, no special treatment is required for the subsequent cleaning in order to remove any adhesive residues.

In a preferred development, the film consists at least partially of a plastic material and in particular has a Thickness of 85 µm +/- 20%. In particular, the film has a thickness of 85 μm +/- 5% or +/- 10%. Such a film is stretchable and yet tear-resistant and is particularly suitable for the intended use.

The film is particularly preferably designed as a multilayer barrier film. A multi-layer barrier film can combine different properties with each other so that an optimal seal can be achieved. An optimal seal can be achieved through a suitable material combination or combination of different layers of different materials. In this way, a high barrier property for gases, water vapor and aromas can be achieved, while at the same time a high resistance to fats, oils and foods with chemical reactivity is made possible. In addition, high impact resistance can be achieved. A high degree of transparency and a glossy impression can be achieved for a visually pleasant impression.

In advantageous embodiments, the film comprises at least one layer which consists at least partially of ethylene-vinyl alcohol copolymer (EVOH). Such a copolymer polyvinyl alcohol enables overall a high barrier property against gases.

In preferred developments, at least one layer of the film consists at least partially of a material such as polyethylene terephthalate (PET). A layer of PET contributes to a high level of transparency and thus a visually pleasant overall impression. Furthermore, a layer of PET has the effect that the film has a high impact resistance overall.

At least one layer preferably consists at least partially of polyethylene, as a result of which very good sealing properties and a high barrier property against water vapor are achieved.

Overall, it is preferred that the film consists of several layers and that the layer composite has a layer of PET as the base material, a layer of EVOH and at least one layer of PE. Such a layer structure achieves excellent mechanical properties and barrier properties.

In all configurations it is preferred that at least one food is arranged on the body and covered by the film. In particular, at least one partially prepared food is arranged on the body, which after removal of the film can be completely prepared or consumed directly.

It is possible and preferred that the space between the film and the dish unit is partially vacuumed. This means in particular that there is a pressure in the space between the film and the dish unit, which is in particular between 100 mbar (preferably 250 mbar) and 800 mbar (preferably 500 mbar).

A gas mixture is preferably present in the intermediate space which consists of more than 50% N2 (nitrogen), more than 15% CO2 (carbon dioxide) and less than 10% O2 (oxygen). The proportion of N2 in the gas mixture is particularly preferably greater than 70%. The proportion of CO2 in the gas mixture is preferably greater than 15% and the proportion of O2 in the gas mixture is in particular less than 10%. Correspondingly high proportions of N2 and CO2 and correspondingly lower proportions of O2 in the gas mixture ensure a reduced reaction speed, so that partially prepared or completely prepared meals can be kept longer than if they are exposed to normal ambient air.

In a preferred development, the body has at least one mirror section and at least one edge section. The adhesive area is particularly preferably formed on the edge section. In particular, the mirror section serves to accommodate at least one food. It is also possible that not only one mirror section is formed, but that several mirror sections are provided or formed on the body. For example, a second or separate mirror section can be provided, which serves to accommodate a separate container or a separate bowl such as a sauce bowl or a jug for sauce or for other dishes or ingredients. It is preferred that at least one edge section runs around the body and thus completely surrounds a central area of the body. It is further particularly preferred that the adhesive area or at least one adhesive area extends completely and around the body. It is preferred here that at least one mirror section is entirely surrounded by a continuous adhesive area. In this way, a complete and safe sealing of the food on the dish unit can be guaranteed. The adhesive should form a closed ring or the like, in particular after it has been applied to the body, since otherwise, for example, a protective gas mixture introduced under the film could escape and normal outside air could penetrate.

The edge section is preferably raised at least in the adhesive area compared to the mirror section. Such an edge section makes it easier to grasp the dish unit or the plate and also to set it down on a table or in a cooking appliance. A raised edge section in the adhesive area can also facilitate the application of the adhesive in the adhesive area, for example if the adhesive is applied via rollers or the like.

In particular, the crockery unit comprises at least one sauce dish, which is in particular positioned off-center on the body of the crockery unit. In particular, the sauce bowl is arranged closer to the edge. In particular, the sauce bowl is positioned reproducibly in a corner area of the body of the dish unit. For this purpose, a corresponding depression or elevation can be formed on the body in order to receive the sauce bowl in a defined manner on the body of the dish unit. In particular, the distance between the saucepan and the edge is less than 1/4 of the length and / or the width of the body of the dish unit. The sauce bowl is in particular removable and typically the sauce bowl protrudes upward over the actual body of the dish unit. As a result, the area of the sauce dish represents a difficult and critical area for gluing with the film. A sauce dish positioned close to the edge of the body and relatively high means that the film rises relatively steeply from the adhesive area adjacent to the sauce dish extends. That is why there should be sufficient adhesive security there.

In all of the configurations it is preferred that the film is cut off outside the body in a contactless manner. In particular, there is no or only a slight lateral protrusion of the film on the body.

It is possible and preferred for an application surface for the adhesive to be formed on the body which provides the adhesive area. Such an application surface can be formed, for example, on an elevation extending along the adhesive area. The application surface preferably has defined dimensions and can in particular have a width between approximately 1.5 mm and 10 mm and in particular between approximately 2 mm and 6 mm. For example, a width of around 3 or 4 mm is possible.

Overall, the body preferably has a width between 10 cm and 25 cm and a length between 20 cm and 38 cm. In preferred embodiments, a width between 15 cm and 20 cm and a length between 25 cm and 35 cm can be present. In particular, the dimensions of the body are adapted to the dimensions of a cooking appliance and in particular to the cooking space of the cooking appliance with which a, for example, partially prepared food is to be prepared to the end.

The dimensions of the body are preferably adapted to the cooking space of the cooking appliance so that the cooking space can accommodate a predetermined number of dishes without creating larger gaps (greater than 2 cm or 3 cm) and thus wasting space for the dishes. With dimensions of a food receptacle of a cooking appliance of 42.5 cm wide and 35.5 cm long, two crockery units can preferably be placed next to each other on the food rack, with enough space left to maneuver the crockery units on the one hand and not wasting too much space in between. Overall, the dimensions of the crockery unit should be selected so that when the maximum possible number of crockery units is placed on a food rack, at least 10% or 20% and a maximum of 30% or 40% of the food rack remain free. As a result, too much space is not wasted and there is also sufficient space to grasp and position the individual dishes.

Particularly preferably, the body consists at least partially and in particular at least substantially or completely of a ceramic-like material. In particularly preferred developments, the body consists at least partially or essentially or completely of magnesium oxide. Crockery units made of a ceramic-like and / or magnesium oxide material can be produced in different shapes and, due to their nature, are suitable for the preparation and consumption of meals. Dish sets based on magnesium oxide are lighter than conventional porcelain and yet just as impact-resistant. As a result, such crockery units are particularly suitable for regular and professional use, for transport and for multiple use.

In preferred developments, at least one food is arranged on the body and covered and sealed by the film.

By introducing inert gas or inert gases into the space between the body of the dish unit and the foil, the food ages more slowly. Reactions can be delayed. This increases the shelf life of meals and can, for example, be doubled, which improves shelf life.

In the method according to the invention for sealing crockery units with film and in particular at least partially partially prepared dishes positioned on crockery units with a film, at least one adhesive is applied to an adhesive area of the crockery unit, which is at least partly made of a ceramic material applied. The adhesive comprises at least one pressure-sensitive hotmelt adhesive and consists at least in part of thermoplastic rubber. The crockery unit is glued to the film by means of the adhesive. The film has at least one sealing layer based on polyethylene.

The method according to the invention also has many advantages. It enables a particularly reliable sealing of crockery units with a film, with a high mechanical stability and a high tightness of the seal being achieved.

Preferably, an intermediate space between the crockery unit and the film is partially vacuumed before gluing. In particular, a pressure between 50 mbar and around 600 mbar is set in the space between the dish unit and the film. An at least partial gas exchange is preferably carried out in the intermediate space. For this purpose it is possible and preferred that at least one inert gas is supplied. The inert gas used can be, for example, nitrogen or carbon dioxide or a noble gas or a mixture of such gases.

In particularly preferred developments, the pressure is first reduced in the space until a first internal pressure (first reduced internal pressure) is reached. An inert gas is then fed in until a second internal pressure (second reduced internal pressure) is reached. Then gas is sucked off until a third internal pressure (third reduced internal pressure) is reached. The first internal pressure, the second internal pressure and the third internal pressure are preferably each lower than the ambient pressure. The first internal pressure and the third internal pressure are particularly preferably in a pressure range below 500 mbar and the second internal pressure is greater than 500 mbar.

The crockery unit is preferably provided with an adhesive bead of the adhesive before food is positioned on the crockery unit. The film and the adhesive are preferably tempered during the gluing process. In particular to about 140 ° C to 160 ° C, preferably about 150 ° C. The tableware unit can also be temperature-controlled, with the tableware unit, however, preferably only being temperature-controlled to about 15 ° C to 25 ° C.

The adhesive is preferably applied using an adhesive application machine which comprises nozzles and / or stationary elements such as, for example, scrapers and / or rotating elements such as for example rollers. The crockery unit is preferably guided through the adhesive application machine via, for example, nozzles or via transport rollers with, in particular, a silicone coating, while the adhesive is applied during continuous transport of the crockery unit. It is advantageous if the glue application machine is equipped with ventilation. This enables the application of a seamless, stepless bead of adhesive without overlapping at the ends that meet. This ensures that the film adheres completely all the way round.

Preferably, in the adhesive area covered by the adhesive application machine, an adhesive bead is applied with an amount of adhesive of 25 to 40 milligrams per one centimeter of bead, in particular of about 30 milligrams per one centimeter of bead. The adhesive has a density of approx. 0.95 g / cm ³ . If the bead is 3 to 4 millimeters thick, this results in a surface application of 70 to 120 milligrams per square centimeter. Adhering to these parameters ensures, on the one hand, good and safe adhesion during the sealing process and, on the other hand, enables the film and adhesive to be removed without leaving any residue.

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

• 1 eine Draufsicht auf eine erfindungsgemäße Geschirreinheit und eine perspektivische Darstellung von zwei Geschirreinheiten in einem Gargerät;
• 2 einen stark schematischen Querschnitt durch eine Geschirreinheit;
• 3a eine Draufsicht auf eine andere erfindungsgemäße Geschirreinheit;
• 3b einen schematischen Schnitt durch die Geschirreinheiten nach 3;
• 4 einen stark schematischen Querschnitt durch die Folie;
• 5 eine schematische Darstellung einer Geschirreinheit in einer Klebeauftragsmaschine;
• 6 eine stark schematische Darstellung einer Geschirreinheit mit darauf positionierten Speisen beim Abdecken mit einer Folie; und
• 7 eine stark schematische Darstellung einer Geschirreinheit mit darauf angerichteten Speisen, die mit einer Folie versiegelt ist.

In the figures show:

• 1 a top view of a crockery unit according to the invention and a perspective view of two crockery units in a cooking appliance;
• 2 a highly schematic cross section through a crockery unit;
• 3a a plan view of another dish unit according to the invention;
• 3b a schematic section through the crockery units 3 ;
• 4th a highly schematic cross section through the film;
• 5 a schematic representation of a dish unit in a glue application machine;
• 6th a highly schematic representation of a dish unit with food positioned thereon when covered with a film; and
• 7th a highly schematic representation of a crockery unit with dishes served on it, which is sealed with a film.

1 shows a highly schematic plan view of a crockery unit 1 , which is designed here as a rectangular plate and a body 2 includes. The body has a mirror section 3 and an edge portion 4th on, the here on the longitudinal and transverse edges a total of four edge segments includes. The edge section 4th delimits the mirror section 3 laterally. Between the actual edge section 4th and the actual mirror section 3 inclined edges can also be provided, as shown in FIG 1 or in 2 can be recognized.

The mirror section 3 provides enough space for several dishes 30th available, which can be part of a menu course, for example. It is possible to have a full course on the dish unit 1 Takes place. At least some of these dishes can be partially prepared, ie at least partially pre-cooked. Others can also be raw or frozen (e.g. a dessert). All the components of a plate can have the same physical state, but the components on different plates can also have different physical states. For example, a first set of dishes can also contain frozen foods and another set of dishes can only contain foods with chilled components.

The dishes 1 is with a slide 15th sealed, which is not separately recognizable here in the plan view, since it is transparent. The foil 15th is with the edge portion 4th the dishes 1 through the glue 21st glued, previously in the form of an adhesive bead 7th on the entire circumference of the edge section 4th was applied.

In the specific exemplary embodiment, the crockery unit 1 one harness width 5 of about 17 cm and a harness length 6th of about 33 cm. However, other dimensions are also possible. In particular, the outer dimensions of the dishes 1 the inside dimensions of a cooking level 102 of an oven 101 of a cooking appliance 100 customized. Two crockery units can be particularly preferred 1 on the cooking level 102 of the cooking appliance 100 placed at the same time. This allows two or preferably four dishes 1 (on two cooking levels) at the same time.

The width of the cooking space is preferred 105 slightly more than twice as large as a width 5 the crockery unit and / or the length of the cooking space 106 is just over twice the length of a length 6th a crockery unit 1 . The tableware units 1 should be a cooking level 102 of the cooking space 101 Fill as completely as possible, but also leave a small space between each other and towards the walls of the cooking space. This enables the operator to use the individual dishes 1 easy to remove. It is particularly advantageous if the space between the dishes 1 and around it amounts to 10% to 40% and in particular 20% to 40% of the area of the cooking plane. There is preferably a possible gap between two dishes 1 at least 1 cm and preferably at least 2 cm.

The cooking appliance 100 has at least one high frequency heating source 103 whose broadcast frequency can be changed in a controlled manner during operation. The high-frequency energy is preferably emitted by at least two antennas (not shown) and the frequencies emitted by the high-frequency heating sources 103 and their phases can be changed depending on the measured scattering parameters. This allows specific areas and / or specific components or meals to be targeted 30th on the dishes 1 cooked or regenerated while other dishes 30th due to their composition, position and / or consistency almost or completely unaffected by the high-frequency heating source 103 stay. By taking up two or more dishes at the same time, two or more dishes served on the dishes can be regenerated and / or cooked to the end at the same time. As a result, the number of cooking devices required at the same time is correspondingly reduced if the final preparation of a meal is to take place for a group of people at the same time.

It is possible that the cooking appliance 100 next to the high frequency heating source 103 still has other heat sources, such as those used in conventional cooking appliances.

2 shows a crockery unit 1 in a highly schematic cross-section. The body 2 the dishes 1 has a mirror section 3 and an edge portion 4th , the edge portion 4th here comprises an inclined area and an adjoining horizontal area which is essentially parallel to the mirror section 3 is aligned. In the horizontal area of the edge section 4th is the glue area 8th provided, on which a circumferential adhesive bead 7th from an adhesive 21st is applied.

Dish sets are preferred 1 in stock with an adhesive bead 7th from an adhesive 21st provided and temporarily stored. The one with a bead of glue 7th provided crockery unit 1 can be stored dry and especially dust-free for a period of at least one day and possibly also for two, three or more days.

The 3a and 3b show a specific embodiment of a crockery unit 1 in a plan view and in a cross section. The 3a and 3b show the crockery units in the unsealed state. The dishes 1 is essentially rectangular and has rounded corners. The body 2 the Crockery cleanliness 1 here comprises a large and approximately trapezoidal mirror section 3 which covers the essential part of more than 50% and in particular more than 70% of the area of the body 2 fills out. The mirror section 3 surrounds an edge portion 4th , the one to grip the dishes 1 and also for attaching the foil 15th serves. Here in the exemplary embodiment is a second mirror section 23 separately on the body 2 designed, for example, to accommodate a separate container 24 such as a sauce bowl. In the container 24 but other components can also be positioned. At the edge section 4th is again a continuous bead of adhesive 7th is upset. The edge section 4th also forms the edge of the handle here 9 .

In the cross section according to 3b can be seen that the adhesive area 8th with the glue bead 7th on an application surface 18th is made available. The gluing area 8th can also be on the circumferential increase 19th be trained.

4th shows a highly schematic cross section through the film 15th , which is designed here as a multi-layer barrier film and here three different layers 15a , 15b and 15c includes. The layer 15c serves as a carrier layer and consists essentially of PET here. The carrier material contributes to a high transparency and a high impact resistance of the film. This ensures a mechanically high load capacity.

Especially inward to the space in between 16 and the layer is oriented towards the adhesive 21 15a provided as a sealing layer, which consists in particular of PE (polyethylene) or comprises polyethylene as an essential or essential component. A layer of polyethylene achieves very good sealing properties and high adhesiveness. At the same time, good barrier properties are achieved, especially with water vapor.

The layer arranged here in the middle 15b is in particular an EVOH layer and consists of a copolymer of polyvinyl alcohol, in particular of ethylene-vinyl alcohol copolymer. The layer 15b gives the slide 15th overall very good barrier properties against gases.

Overall, the slide has 15th high mechanical resistance and high impact resistance. The film is overall transparent and gives it a shine. High barrier properties for gases, water vapor and aromas and thus a considerably improved shelf life are achieved.

The thickness of each layer 15a , 15b and 15c can be different and is in 4th each shown similarly only for the sake of clarity. As a rule, the carrier layer will have the greatest thickness. The individual layers 15a , 15b and 15c can have very different thicknesses. It is also possible that the film consists of a layer composite of four, five or more layers, each of which can consist of different materials.

5 shows a highly schematic representation of an adhesive application machine 20th , through which the crockery units 1 run through and provided with a coating of the adhesive. Nozzles can be used to apply the adhesive 26th and / or scraper 27 and / or rotatable rollers 28 are used, which by a storage container 31 with a supply of glue 33 Adhesive or sealing material 21st is fed. The roller preferably has a relief structure so that the adhesive can be carried along better. Transport rollers 32 which is the unit of dishes relative to roller 28 convey, can have a silicone coating or the like, from which any adhesive on it can be easily removed. Preferably in the adhesive area 8th the glue application machine 20th covered, a bead of glue 7th applied with an amount of adhesive of 25 to 40 milligrams per one centimeter of bead, in particular of about 30 milligrams per one centimeter of bead. The adhesive has a density of approx. 0.95 g / cm ³ . If the bead is 3 to 4 millimeters thick, this results in a surface application of 70 to 120 milligrams per square centimeter. Compliance with these parameters ensures, on the one hand, good and safe adhesion during the sealing process and, on the other hand, enables the film to be detached without leaving any residue 15th including glue 21st .

The 6th and 7th show different dishes 1 those with, in particular, partially prepared meals 30th are provided, in very schematic views before sealing ( 6th ) and after sealing ( 7th ).

Above the in 6th shown tableware unit 1 on which several dishes 30th are arranged is a foil 15th arranged, which is used for sealing. Here is the slide 15th pictured before the stretching and later sealing. The size of the foil is such that the complete set of dishes 1 can be sealed. In particular, for this purpose, film is unwound from a film roll and cut to size accordingly.

The film has a total thickness of 85 μm and is sealed with the sealing layer 15a towards the crockery unit 1 positioned.

First is the slide 15th heated and preheated. In the space in between 16 and overall in the chamber in which the crockery unit 1 is recorded, a first vacuum is generated or the pressure is reduced to a first internal pressure. This will determine the absolute amount of oxygen in the space 16 accordingly reduced. An inert gas is then fed in until a second internal pressure is reached, which, however, is still lower than the normal ambient pressure. By supplying inert gas, the absolute oxygen content becomes that in the space 16 the gas present is reduced again accordingly. Preferably in this step the film 15th of the food and the cleanliness of the dishes 1 created. In a third step, gas is sucked off until a third internal pressure is reached which is lower than the second internal pressure and, in particular, is higher than the first internal pressure. The third internal pressure is also preferably less than ambient pressure.

This procedure ensures that in the remaining space 16 (compare 7th ) there is a high proportion of inert gas and that there is only a small amount of oxygen that is required for a chemical reaction. The low oxygen content is at a relatively high internal pressure in the space 16 reached. Without inert gas, the evacuation would have to be more intense in order to achieve the same amount of oxygen. 7th Figure 3 shows a very schematic representation of a sealed dish unit 1 . The representation is therefore also schematic, around the space 16 to be able to represent better. In reality, the (pre-stretched) film lies down 15th Practically seamless to the crockery unit over a wide area 1 and the dishes 30th at. This is achieved through the pressure levels set one after the other (first, second and third internal pressure) and by pre-heating the film 15th reached. Also, the slide 15th pre-stretched.

Finally, the slide is applied to the dish unit 1 pressed and pressed at a given pressure or with a given force for a certain period of time. The bead of adhesive becomes 7th heated and melted and reproducibly seals the film 15th with the crockery unit 1 . This will make the slide 15th with the crockery unit 1 glued. Then ambient air is supplied and the dishes 1 taken.

The body 2 the dishes 1 consists of a ceramic material and in particular a porcelain material. A hotmelt adhesive is used as the adhesive, which consists at least partially of thermoplastic rubber and which is transported through a supply hose heated to 150 ° C and onto the edge section with a nozzle or the like heated to 160 ° C 4th the dishes 1 is applied. The adhesive first dries on the edge section 4th and cools down. The dishes 1 or the plate can be stored with the applied adhesive. For storage, a stack of plates is preferably covered with a protective film so that the plates are protected from dust and moisture. The adhesive is heated up again for bonding to the film.

Before sealing, the food is placed on the plate or on the dishes 1 placed and those with dishes 30th equipped crockery units 1 are transported to the sealing machine on a roller conveyor.

The adhesive hotmelt adhesive used has a density of approx. 0.92 +/- 0.02 g / cm3 at 20 ° C. and has a light yellow or transparent appearance. The recommended processing temperature is between 170 ° C and 190 ° C. Notwithstanding this, it has been found that applying the adhesive with a nozzle heated to 160 ° C. is advantageous. During the later sealing, the adhesive bead will be used 7th preferably heated to a temperature between about 140 ° C and 160 ° C and especially about 150 ° C in order to achieve optimum results.

Overall, the present invention provides dish units sealed with foil, in which the foil can be detached almost without leaving any residue and in which food received on the dish unit is reliably sealed.

List of reference symbols

1

Crockery purity, plate

2

body

3

Mirror section

4th

Edge section

5

width

6th

length

7th

Glue bead

8th

Adhesive area

9

Grip edge, edge

15th

foil

15a

Layer, sealing layer

15b

Layer, EVOH layer

15c

Layer, PET layer

16

Space

17th

bottom

18th

Application area

19th

increase

20th

Glue application machine

21st

Adhesive, sealing material

23

Mirror section

24

container

25th

Lower shell

26th

jet

27

Scraper

28

roller

29

knife

30th

Food, ingredient

31

container

32

Transport roller

33

Adhesive supply

100

Cooking appliance

101

Cooking space

102

Cooking level

103

High frequency heating source

105

Oven width

106

Length of the cooking space

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102018000407 [0003]

Claims (22)

Crockery unit (1), in particular plates, for the packaging, transport and / or consumption of food (30), with a body (2) covered with a film (15), wherein between the film (15) and the body ( 2) an adhesive (21) is present in an adhesive area (8) to seal the crockery unit (1), characterized in that the film (15) comprises at least one sealing layer (15a) based on polyethylene, and that the crockery unit (1) at least partially consists of a ceramic material, and that the adhesive (21) comprises at least one pressure sensitive hotmelt adhesive and at least partially consists of thermoplastic rubber and the sealing layer (15a) of the film (15) with the ceramic material of the dish unit ( 1) glued. Crockery unit (1) according to the preceding claim, wherein the film (15) consists at least partially of a plastic material and has a thickness of 85 µm +/- 20%. Dish unit (1) according to one of the preceding claims, wherein the film (15) is designed as a multi-layer barrier film. Crockery unit (1) according to one of the preceding claims, wherein the film (15) comprises at least one layer (15b) which at least partially consists of ethylene-vinyl alcohol copolymer (EVOH). Crockery unit (1) according to one of the preceding claims, wherein at least one layer of the film (15) consists at least partially of a material such as polyethylene terephthalate (PET). Dish unit (1) according to one of the preceding claims, wherein at least one dish (30) is arranged on the body (15) and is covered by the film (15). Crockery unit (1) according to one of the preceding claims, an intermediate space (16) between the film (15) and the crockery unit (1) being partially vacuumed. Crockery unit (1) according to the preceding claim, wherein a gas mixture is present in the intermediate space (16) which consists of more than 50% N2, more than 15% CO2 and less than 10% O2. Dishware unit (1) according to one of the two preceding claims, wherein the proportion of N2 in the gas mixture is greater than 70% and wherein the proportion of CO2 in the gas mixture is greater than 15% and wherein the proportion of O2 in the gas mixture is less than 10 % is. Dish unit (1) according to one of the preceding claims, wherein the body (2) has at least one mirror section (3) and at least one edge section (4) and wherein the adhesive area (8) is formed on the edge section (4), wherein in particular the edge section (4) is increased at least in the adhesive area (8) compared to the mirror section (3). Dish unit (1) according to one of the preceding claims, wherein a seed shell is included and is positioned off-center. Crockery unit (1) according to one of the preceding claims, wherein protruding film (15) is cut off without contact outside the body (2). Crockery unit (1) according to one of the preceding claims, wherein the body (2) consists at least partially of magnesium oxide. Crockery unit (1) according to one of the preceding claims, an amount of adhesive of 25 to 40 mg per cm, in particular of about 30 mg per cm, being applied in an adhesive area (8). A method for sealing at least partially partially prepared dishes (30), the dishes (30) being positioned on a dish unit (1) and covered with a film (15), characterized in that an adhesive area (8) is at least partially composed of a Ceramic material existing crockery unit (1) at least one adhesive (21) is applied which comprises an adhesive hotmelt adhesive and consists at least partially of thermoplastic rubber and a film (15) is glued to it, which comprises at least one sealing layer based on polyethylene . Method according to the preceding claim, wherein an intermediate space (16) between the crockery unit (1) and the film (15) is partially vacuumed before gluing. Method according to the preceding claim, wherein a pressure between 50 mbar and 600 mbar is set in the intermediate space (16). Method according to one of the two preceding claims, wherein an at least partial gas exchange is carried out in the intermediate space (16). Method according to the preceding claim, wherein at least one inert gas is supplied. Method according to one of the two preceding claims, wherein in the intermediate space (16) the pressure is first reduced to a first internal pressure and then an inert gas is supplied until a second internal pressure is reached and then gas is sucked off until a third internal pressure is reached. Method according to the preceding claim, wherein the first, second and third internal pressures are each less than the ambient pressure. Method according to one of the seven preceding claims, wherein the crockery unit (1) is provided with an adhesive bead (7) of the adhesive before food (30) are positioned on the crockery unit (1) and wherein the film (15) and the adhesive (21 ) are tempered during gluing.

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