BG4022U1 - Recyclable material and packaging for bread and bakery products - Google Patents

Abstract

The recyclable material is suitable for the production of disposable food packaging, mainly for bread or bakery products, however it can also be used for packaging of other foodstuffs. The packaging made of this material guarantees durability and preservation of the characteristics (softness, colour, smell, etc.) of the packaged product up to a minimum of 72 hours upon its closing and furthermore it can be recycled. The recyclable material consists of three layers, as the two outer ones are made of high-density extruded polyethylene with a thickness of 2 to 8 micrometers, and the inner layer is made of stone paper with a thickness of 30 to 80 micrometers. The recyclable packaging consists of a dense and transparent part, as the dense part is made of the recyclable material and the transparent part is made of extruded high-density polyethylene.

Description

Field of technology

The utility model refers to the packaging industry, in particular to recyclable material suitable for the production of disposable food packaging, as well as packaging for such products. Recyclable material and packaging will find application mainly in the packaging of bread and bakery products, but can also be used for packaging other food products, which are placed manually or by machine in the appropriate packaging.

BACKGROUND OF THE INVENTION

The packaging industry offers a wide variety of packaging materials and packaging for bread, bakery and pasta products. At present, cellophane, paper extruded with polyethylene paper, packaging materials and packaging based on synthetic polymers, including those with heat-shrinkable and stretch properties, are mainly used for packaging bread and bakery products.

As a cellulose-based packaging material, cellophane has high vapor permeability. In recent years, cellophane with a single-sided or double-sided lacquer coating is even preferred for packaging purposes. This makes it possible to obtain packaging with the required thermal weldability and lower vapor and gas permeability. Warm bread does not require a large barrier, especially in terms of vapor permeability, but ordinary cellophane is not heat-sealable, which requires the use of special coatings. Cold-cut bread requires a barrier to keep the bread soft and then the package is extruded with polyethylene, making it non-recyclable. The same type of packaging is used for fatty products, such as pasta snacks.

Paper packaging is environmentally friendly, recyclable and the technologies for their production are well controlled. Paper bags cover all environmental standards with their high degree of recyclability and compatibility with the environment. They degrade quickly and do not adversely affect flora and fauna if they are made from environmentally friendly recycled paper. The envelopes are mainly made of kraft paper.

In order for the images to print well on it and for the colors to be brighter, the kraft paper is treated with various bleaches during its production, which make it white. Although they are attractive and elegant, paper packaging is an expensive pleasure, as the paper used for their production is expensive. In addition, the properties of paper as a packaging material do not allow bakery products to be stored for a long period of time.

In the industrial packaging in the bakery enterprises are used mainly packaging and packaging materials based on various polymers. Due to its exceptional properties, polypropylene is the most preferred. Its high performance in terms of thermal weldability, printability, graphic design and labeling, as well as the transparency of the polymer, ensuring the visibility of the product, are more than enough to be preferred as a packaging material.

BG 4022 UI

Especially for machine-cut and packaged bread, a package is used - an envelope, which is made of paper extruded with polyethylene in combination with cast foil (polypropylene obtained by the method of cast extrusion). This material ensures that the bread retains its properties for a period of 72 hours, but is neither recyclable nor biodegradable. High-density polyethylene, designated under international code number 2, is a type of plastic that can be recycled. However, the polyethylene from the paper extruded with it, in the known bread packaging, is difficult to separate from the paper and recycle. Therefore, these packages are currently being destroyed by incineration, which leads to environmental pollution.

European Union rules on the management of packaging and packaging waste are defined in Directive 94/62 / EC. One of the objectives of this directive is to improve the quality of the environment by preventing and reducing the impact of packaging and waste. Directive (EU) 2018/852, which is the latest amendment to Directive 94/62 / EC, includes updated measures to encourage reuse, recycling and other forms of recovery of packaging waste instead of final disposal. One of the tasks set for the countries of the European Union in the updated directive is to take the necessary measures and to achieve specific recycling targets that are different for different packaging materials. Within the targets set in this directive, 50% of plastics should be recycled by the end of 2025 and 55% by the end of 2030. Plastic recycling means the processing of plastic waste to obtain material for new plastic products. This avoids making plastic from raw materials - coal, gas and crude oil, which saves natural resources and protects the environment. A feature of plastic recycling is that not all plastics are recyclable. By Decision 97/429 / EC "establishing an identification system for packaging materials pursuant to Directive 94/62 / EC", supplementing Directive 94/62 / EC "on packaging and packaging waste". The European Commission has established a system of alphanumeric codes to identify the materials from which product packaging is made. Only four types are suitable for processing - polystyrene, polyethylene, polyvinyl chloride and polypropylene, which are marked with international numerical codes from 1 to 7. Mixing different types of plastics with other types of materials, as well as mixing different types of plastics makes recycling difficult or impossible. them.

Technical essence of the utility model

The task of the utility model is to create a recyclable material suitable for the production of disposable food packaging, in particular for bread and bakery packaging, as well as bread and bakery packaging that retains its elasticity, taste and the smell of the packaged products for a period of not less than 72 hours without the formation of a bacterial film or mold on them and which can be recycled.

The recyclable material for the production of food packaging, in particular for bread and bakery products, according to the utility model, consists of three layers, the two outer layers being made of extruded high-density polyethylene and the inner layer of stone paper.

The outer layers of extruded high-density polyethylene are 2 to 8 pm thick, and the inner layer of rock paper is 30 to 80 pm thick.

In a preferred embodiment of the recyclable material, the outer layers of extruded high density polyethylene are 4 pm thick and the inner layer of rock paper is 50 pm thick.

The recyclable packaging for bread and bakery products, according to the utility model, consists of a dense and transparent part. The solid part is made of three-layer material, the two outer layers of which are made of extruded high-density polyethylene with a thickness of 2 to 8 pm, and its inner layer is made of stone paper with a thickness of 30 to 80 pm. The transparent part of the package is made of extruded high-density polyethylene with a thickness of 20 to 40 pm.

High density polyethylene is marked with the number 2 according to the classification of the European Commission.

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0D 2

PE HD

BG 4022 UI

Stone paper is a material made under high pressure and temperature of limestone CaCO3 (80%) and high density polyethylene (20%).

Limestone is a catalyst in the recycling of polyethylene. Therefore, the proposed new material for the production of food packaging, in particular for bread and bakery packaging, can be recycled using high-density polyethylene recycling technology. Unlike cellulose paper, which is incompatible with polyethylene recycling, stone paper allows the material to be recycled without prior separation.

The material is suitable for the production of food packaging, in particular for bread and bakery products, as it is characterized by high elasticity, food safety, impermeability to water, moisture and fat. This material does not retain water on its surface and thus does not create conditions for bacteria to stick and mold to form. As wood pulp, water, chlorine and other bleaches, which lead to environmental pollution, are not used in the production of stone paper, the material as a whole is more environmentally friendly.

In addition, stone paper is a photo-biodegradable product. It degrades in 14-18 months when exposed to ultraviolet light. Therefore, a second way of recycling the material created for the production of food packaging, in particular for bread and bakery products, is also possible. It is possible to first be exposed to prolonged ultraviolet radiation, during which the stone paper will be decomposed, after which the high-density polyethylene will be able to be recycled by known polyethylene recycling technologies.

The created recyclable material has a natural white color due to the white color of the stone paper and the transparency of the polyethylene. The double-sided polyethylene coating of the stone paper

BG 4022 UI retains the advantages of polyethylene in terms of thermal weldability, printability. graphic design and labeling, which are important in the production of packaging.

Packaging made only of recyclable material, as well as packaging with a dense part made of this material and a transparent part made of extruded high-density polyethylene, guarantee durability and preservation of the characteristics (softness, color, odor, etc.) of the packaged product to a minimum 72 h after closing. The packaging created in this way is completely recyclable.

Explanation of the attached figures

Figure 1 shows the unfolding of an envelope-type package according to an exemplary embodiment of the utility model.

Figure 2 is a perspective view of the packaging envelope according to the exemplary embodiment of Figure 1.

Examples of implementation of the utility model

According to one embodiment, the recyclable material is prepared as follows. Two sheets of extruded high-density polyethylene film with a thickness of 4 pm are glued to a 50 pm thick sheet of stone paper on both sides with hot melt glue melted at a temperature of about 160 ° C. The resulting material is white, dense, elastic, opaque and due to the above properties can be recycled. It is suitable for making packaging for bread and bakery products.

With the recyclable material, according to the utility model, opaque envelope-type packaging or packaging with a square bottom can be made. These packages are made according to the known technology for making packages for bread or bakery products. The necessary information about the packaged product is printed on the obtained sheet material by flexographic printing, with or without heating. Then the bottom is sequentially cut and glued with room temperature glue or hot melt glue.

In order to ensure the visibility of the packaged product, packaging made of recyclable material can also be made with a transparent part.

According to an exemplary embodiment of the utility model shown in the attached two figures, the recyclable packaging for bread and bakery products is an envelope consisting of a solid part 1 and a transparent part 2. The solid part 1 is made of a three-layer material whose two outer the layers are made of extruded high-density polyethylene with a thickness of 4 pm, and its inner layer is made of stone paper with a thickness of 50 pm. The transparent part 2 of the package is made of extruded high-density polyethylene with a thickness of 30 pm.

When making this package, the dimensionally sized transparent part 2 of extruded high-density polyethylene is glued to the blank of recyclable material of certain dimensions with hot melt glue until the unfolding shown in Figure 1 is obtained. The unfolding is then folded to obtain the envelope shown in Figure 2.

When tested at room temperature on a package of the type shown, it was found that it ensures the preservation of the elasticity, taste and smell of the products - bread or bakery products, for a period of not less than 72 hours, without forming bacterial film or mold on them.

Claims (3)

A recyclable material for the production of packaging for bread and bakery products, consisting of three layers, the two outer layers of which are made of high-density extruded polyethylene with a thickness of 2 to 8 pm, and the inner layer of stone paper with a thickness of 30 to 80 pm. Recyclable material according to Claim 1, characterized in that the two outer layers of extruded high-density polyethylene are 4 pm thick and the inner layer of rock paper is 50 pm thick. 3. Recyclable packaging for bread and bakery products, consisting of a solid part (1) and a transparent part (2), the solid part (1) being made of a three-layer material, the two outer layers of which are made of extruded high-density polyethylene from 2 to 8 pm, and its inner layer is made of stone paper with a thickness of 30 to 80 pm, and the transparent part (2) is made of extruded high-density polyethylene with a thickness of 20 to 40 pm.