Wrapping paper for food

Abstract

Wrapping paper (10, 10.3) for food (12),- comprising a paper layer (20, 20.3),- comprising a plastic film (30) which is only partially attached to the paper layer (20, 20.3) via adhesive points (40, 42),- characterized in that,- the paper layer (20, 20.3) has a basis weight of less than 30 g / m2, in particular a basis weight of about 22 g / m2,- the plastic film (30) has a thickness of less than 6 µm, in particular a thickness of about 4 µm.

Description

TECHNICAL AREA The invention relates to a wrapping paper for food. Such wrapping papers are used to package loose foodstuffs sold at a fresh food counter or a service counter. In particular, moist or fatty foods – for example, meat products, sausages, or cheese – are first wrapped in the wrapping paper before the packaged foodstuffs are handed to the end customer in a bag or pouch. STATE OF THE ART The most commonly used wrapping paper is a composite material made of paper coated with plastic. In this case, the paper and plastic are firmly bonded together. The plastic layer comes into contact with the food. Due to the combination of plastic and paper, it is a composite material that cannot be sorted for recycling. Therefore, this wrapping paper is not recyclable, must be disposed of with general waste, and is thus environmentally harmful and outdated. Therefore, wrapping paper consisting of a paper layer and a plastic film is increasingly used, in which the paper layer is no longer fully bonded to the plastic film. Instead, the plastic film is only attached to the paper layer at certain points. In principle, it would be possible to separate the plastic film from the paper layer and collect and recycle the two materials separately. However, due to the lack of labeling for intended disposal and the difficulty of removing the plastic film, the wrapping paper is usually still disposed of with general household waste. The use of plastic film in a mass-produced product intended only for short-term use and subsequent disposal leads to severe environmental pollution. Therefore, repeated trials have been conducted with plastic-free material combinations. For example, DE 10 2020 001 625 A1 discloses a wrapping paper for food that does not require fossil raw materials. The wrapping paper disclosed therein has a hydrophobic paper layer coated on at least one side with a layer of wax or varnish. However, the production of such wrapping papers is more expensive than that of conventional wrapping papers, which is why these wax-coated wrapping papers have not yet gained market acceptance. PRESENTATION OF THE INVENTION Based on this prior art, the invention aims to provide an improved wrapping paper for food that reduces the consumption of fossil and natural raw materials and has the smallest possible CO2 footprint. The wrapping paper according to the invention is defined by the features of main claim 1. Further developments of the invention are the subject of subsequent claims. The wrapping paper according to the invention comprises a paper layer and a plastic film, which is only partially attached to the paper layer by adhesive points. According to the invention, the paper layer has a basis weight of less than 30 g / m², in particular a basis weight of approximately 22 g / m². According to the invention, the plastic film has a thickness of less than 6 µm, in particular a thickness of approximately 4 µm. The use of a significantly lighter paper layer and plastic film results in a particularly sustainable and resource-efficient material combination. Such wrapping paper therefore has a significantly smaller CO2 footprint than existing wrapping papers. The wrapping paper according to the invention thus follows the guiding principle for environmentally friendly products: "Products also have a CO2 footprint, which includes the sum of the emissions generated by the production, use, recycling, and disposal of the respective product." Preferably, the adhesive points can be arranged along the edge of the wrapping paper. Furthermore, additional adhesive points can be present in the central area of ​​the wrapping paper, arranged in a repeating grid pattern, so that empty spaces without adhesive points are formed in the central area of ​​the wrapping paper. Previously, the adhesive joints were arranged in a repeating pattern, with the distance between adjacent joints remaining approximately constant in all directions. Such adhesive joints can be applied evenly, for example, using a plate, a roller, or a spraying process. However, this requires joints that are as close together as possible to prevent the plastic film from unintentionally detaching at the edges. This resulted in a high overall consumption of adhesive. The arrangement of the adhesive points according to the invention allows the edge area of ​​the wrapping paper to be securely bonded, thus preventing unintentional detachment of the plastic film. At the same time, larger gaps are created in the central area of ​​the wrapping paper, where several potential bonding points are missing compared to conventional adhesive arrangements. These unbonded areas reduce adhesive consumption. Furthermore, the intended removal of the plastic film for separate recycling is significantly simplified, enabling a higher recycling rate. For example, the adhesive strips in the middle of the wrapping paper can be arranged in rows or columns, creating rectangular gaps in the middle. Alternatively, the adhesive strips in the middle can be arranged to create hexagonal gaps. Other, alternative grid-like patterns at the adhesive strips are also conceivable. In a preferred embodiment, the paper layer can have at least one cutout in the central area, located in at least one of the voids. Previously, the paper layer was continuous and formed a nearly opaque layer. The contents wrapped in the wrapping paper could therefore only be seen by unwrapping the wrapping paper. This is less hygienic, as repeatedly wrapping and unwrapping the contents increases the risk of contamination. Furthermore, this was inconvenient and therefore not very user-friendly for the end customer. The at least one cutout in the paper layer now allows the contents to be seen even when wrapped, which is significantly more convenient for the end customer. In addition, the weight of the wrapping paper can be considerably reduced by creating at least one cutout.This also reduces the fees for disposal and production of the single-use plastic product. The cutouts removed from the paper film can, for example, be returned to the supplying paper mill as raw material. This allows for the recycling of the paper cutouts and conserves additional resources. Preferably, several small cutouts can be present in the paper layer, which can be circular or oval in shape. The formation of several small cutouts maintains the stability of the paper layer, preventing any weakening of the wrapping paper. At the same time, this makes the wrapping paper transparent in several places, so that the contents are clearly visible even when wrapped, without having to pay attention to where on the wrapping paper the product to be packaged is placed. To further facilitate the removal of the plastic film for recycling, at least one of the corners of the edge area can be free of adhesive. In this case, the paper layer can have a visual marking in the area of ​​this free corner, making it particularly easy for the end customer to find and grasp. In a particularly preferred embodiment, the paper layer of the wrapping paper can consist of, or at least contain, recycled fibers or a rapidly renewable raw material, in particular grass, hay, or straw. Using recycled materials or rapidly renewable raw materials as components of the wrapping paper's paper material can further reduce resource consumption. Especially with disposable and mass-produced products, even small material savings can make a significant contribution to the future of the planet. Replacing materials with more environmentally friendly alternatives can also contribute to this. The wrapping paper according to the invention can take a further step in this direction. Further advantages and features of the invention can be seen in the features further specified in the claims and in the exemplary embodiments below. BRIEF DESCRIPTION OF THE DRAWING The invention is described and explained in more detail below with reference to the exemplary embodiments shown in the drawing. Figure 1 shows a cross-section through a first embodiment of the wrapping paper according to the invention with a product placed on it, Figure 2 shows a top view of the wrapping paper according to Figure 1, and Figure 3 shows a top view of a second embodiment of the wrapping paper according to the invention. WAYS TO IMPLEMENT THE INVENTION The first embodiment of the wrapping paper 10 according to the invention is shown in Figures 1 and 2. The wrapping paper 10 has a paper layer 20, which is generally the underside of the wrapping paper 10. Furthermore, the wrapping paper 10 has a plastic film 30, which typically forms the top side of the wrapping paper 10. Accordingly, a food item 12 to be packaged, for example a piece of meat, a portion of fresh sausage, or a piece of cheese, is placed on the plastic film 30 and then wrapped in the wrapping paper 10. The plastic film 30 is attached to the paper layer 20 by means of several adhesive points 40, 42. The adhesive points 40 are arranged along the edge region 44 of the wrapping paper 10. The adhesive points 42 are located in the central region 46 of the wrapping paper 10 and, in this example, are arranged in the form of rows 50 and columns 52. This creates empty spaces 54 in the central region 46 of the wrapping paper 10 in which no adhesive points 40, 42 are present. In the present example, one of the four corners 56 of the wrapping paper 10 lacks an adhesive point 40, 42, leaving this corner free. The paper layer 20 has a corresponding optical marking 58 in the area of ​​this corner. This simplifies the peeling of the plastic film 30 from the paper layer 20. A second embodiment of the wrapping paper 10.3 according to the invention is shown in Fig. 3. The plastic film 30 is attached to the paper layer 20 by means of several adhesive points 40, 42. In the central area 46.3, the paper layer 20.3 has several circular recesses 60. These recesses 60 are each arranged in empty spaces 54 between the adhesive points 42. In the present example, not all empty spaces 54 have corresponding recesses 60. In contrast, more or fewer of the empty spaces 54 could also be provided with corresponding recesses 60. The shape of the recesses 60 is, in principle, arbitrary. However, it has been found that circular or oval recesses 60 are advantageous, as these least impair the stability of the paper layer 20. The arrangement of the adhesive points 42 in the central area 46 of the wrapping paper 10, 10.3 can be arbitrary, as long as several empty spaces 54 are formed. The arrangement of the outer adhesive points 40 can also differ from the embodiment shown in the drawing. For example, larger or smaller distances between the adhesive points 40 can be provided. It would also be possible to seal the edges of the wrapping paper 10, 10.3 with a continuous adhesive strip, while point adhesive points are provided in the central area 46 of the wrapping paper 10, 10.3. QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature DE 10 2020 001 625 A1

[0004]

Claims

Wrapping paper (10, 10.3) for food (12),- comprising a paper layer (20, 20.3),- comprising a plastic film (30) which is only partially attached to the paper layer (20, 20.3) via adhesive points (40, 42),- characterized in that,- the paper layer (20, 20.3) has a basis weight of less than 30 g / m2, in particular a basis weight of about 22 g / m2,- the plastic film (30) has a thickness of less than 6 µm, in particular a thickness of about 4 µm. Wrapping paper according to claim 1, characterized in that adhesive points (40) are arranged along the edge region (44) of the wrapping paper (10, 10.3), and further adhesive points (42) are present in the middle region (46) of the wrapping paper (10, 10.3), which are arranged in a repeating grid pattern, so that empty spaces (54) without adhesive points (40, 42) are formed in the middle region (46) of the wrapping paper (10, 10.3). Wrapping paper according to claim 2, characterized in that the adhesive points (42) in the central (46) area are arranged in a row or column shape, so that rectangular voids (54) can be formed in the central area (46) of the wrapping paper (10, 10.3). Wrapping paper according to claim 2, characterized in that the empty spaces in the middle area (46) of the wrapping paper are hexagonal. Wrapping paper according to one of claims 1 to 4, characterized in that the paper layer (20.3) has at least one recess (60) in the area of ​​at least one of the empty spaces (54) of the wrapping paper (10.3). Wrapping paper according to claim 5, characterized in that the paper layer (20.3) has several recesses (60). Wrapping paper according to claim 5 or 6, characterized in that the at least one recess (60) is circular or oval. Wrapping paper according to one of the preceding claims, characterized in that at least one of the corners (56) of the edge area (44) is free of adhesive points (40). Wrapping paper according to claim 8, characterized in that the paper layer (20, 20.3) has an optical marking (58) in the area of ​​the free corner (56). Wrapping paper according to one of the preceding claims, characterized in that the paper layer (20, 20.3) consists of recycled fibers or of a rapidly renewable raw material, in particular grass, hay or straw, or at least contains such a raw material.

Images