KR-102961540-B1 - vacuum-sealed plastic pouch

Abstract

A biodegradable vacuum-sealing plastic bag comprises a bag body composed of a plurality of film layers (1, 2, 3), a receiving cavity formed in the middle of the bag body that can be used to store food, at least one of the film layers comprises a degradation accelerator material, polyethylene is contained within the film material to prepare and manufacture the plurality of layers, and the amount of the degradation accelerator material added is about 5% by weight of the polyethylene.

Inventors

• 시에 린이

Assignees

• 브라우크만 게엠베하

Dates

Publication Date

20260507

Application Date

20200525

Priority Date

20191229

Claims (10)

1. A biodegradable vacuum-sealingable plastic bag comprising a bag body composed of a layer synthesized from a plurality of film layers (1, 2, 3), A receiving cavity that can be used to store food is formed in the middle of the above-mentioned bag body, and At least one of the above film layers comprises a prodegradant material, and polyethylene is contained within the film material to prepare and manufacture the plurality of layers, and the amount of the prodegradant material added is 5 weight percent of the polyethylene, and The polyethylene contained in the inner film layer material (3) of the above-mentioned bag body is a mixture of LDPE (low-density polyethylene) and LLDPE (linear low-density polyethylene) in a weight ratio of 1-7:1-15, and is prepared and manufactured by co-extrusion, casting, blowing, and molding processes, and A plastic bag in which, after the above-mentioned inner film layer is formed, stripe-like or dot-like air channels are embossed on the surface.
2. In Article 1, The polyethylene contained in the outer film layer material (1) of the above-mentioned bag body is a mixture of HDPE (high-density polyethylene), LLDPE (linear low-density polyethylene), and metallocene linear low-density polyethylene (mLLDPE) in a weight ratio of 1-3:1-10:1-7, and is a plastic bag prepared and manufactured by co-extrusion, casting, blowing, and molding processes.
3. In Article 1, The film layer comprises two film layers or three or more film layers; where the film layer comprises three or more film layers, the polyethylene contained within the intermediate film layer material is a mixture of LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), and metallocene linear low-density polyethylene (mLLDPE) in a weight ratio of 1-3:1-8:1-5, and is a plastic bag prepared and manufactured by co-extrusion, casting, blowing, and molding processes.
4. In Article 1, The above-mentioned decomposition accelerator material is a plastic bag that is an oxidatively biodegradable additive containing polyethylene as a carrier.
5. In Article 2, A plastic bag in which the outer film layer of the bag body, prepared and manufactured by mixed-type co-extrusion blow molding, undergoes orientation and expansion treatment.
6. In Article 1, A plastic bag in which the inner film layer of the bag body, prepared and manufactured by mixed-type co-extrusion blow molding, does not undergo orientation and expansion treatment.
7. In any one of paragraphs 1 to 3, The above co-extrusion, casting, blowing, and forming processes are: Adding raw materials into the extruder, Raising the temperature to 180-350℃ to form a molten mixture, After that, rapidly lowering the temperature to 65-85℃ at a cooling rate of 15℃/second, and Transferring a cooled molten mixture to a casting bed preheated to 45-65℃ for casting, A plastic bag comprising blowing and cooling a film using a film blowing machine having a nozzle slit of less than 1.0 mm and a rotational speed of 10 to 20 r/min, and forming the film layer after molding.
8. In Article 1, A plastic bag comprising: synthesizing the plurality of film layers above, including the sequential lamination of the prepared and manufactured inner film layer and outer film layer, or the inner film layer, intermediate film layer, and outer film layer; and a vacuum sealable plastic bag including the bag body is manufactured by hot pressing and molding using a roller.
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Description

vacuum-sealed plastic pouch The present invention relates to the preparation and manufacture of food packaging bags, particularly vacuum-sealing plastic bags. Environmental pollution and long-term damage to the Earth caused by plastic products pose a significant challenge to humanity. Consequently, advanced industrial nations in Europe and North America have successively passed legislation to reduce plastic consumption and ban plastics. Particularly in the food sector, the annual need for packaging materials is high, and most of these materials pose a serious threat to the ecological environment, not to mention the massive consumption of energy and resources. The majority of plastic products are used for food packaging, posing potential risks when the food is consumed by humans. From this perspective, safety concerns exist. Furthermore, the mechanical strength, suitability for mass production, moisture resistance, vapor resistance, and water insolubility of plastic food packaging influence its use in the market. This also applies to the stability, safety, and quality of food packaging made from new materials during food storage. For example, patent application CN 01129006.4 discloses a small package for marinated meat products. An additional example is patent application CN 99125782.0, which discloses a composite material for food packaging. This comprises a core layer and an outer layer, wherein the core layer is coated with an outer layer comprising aluminum foil. An additional example is patent application CN 201310420320.8 disclosing a functional multilayer adhesive film made of a composite material. According to a 5-layer structure made of PE/EVOH/PA/EVOH/PE, a suitable additive is added to each layer, and a functional multilayer composite adhesive film is manufactured therefrom by co-extrusion blow molding. FIG. 1 is a schematic diagram of a biodegradable vacuum-sealingable plastic bag, one of the exemplary embodiments of the present invention. FIG. 2 is a schematic diagram of the carbonyl optical density of a naturally degradable vacuum-sealingable plastic bag in an accelerated thermal aging process of an exemplary embodiment of the present invention. Hereinafter, exemplary embodiments of the present invention will be described in more detail in combination with the drawings. It should be noted that the description of exemplary embodiments provided herein is for understanding the present invention but does not constitute a limitation on the present invention. Furthermore, each of the technical features described below may be combined in various exemplary embodiments of the present invention to the extent that they do not conflict with one another. Exemplary embodiment 1: As illustrated in FIG. 1, the present invention provides a biodegradable vacuum-sealable plastic bag. This vacuum-sealable plastic bag comprises a bag body. The bag body is composed of layers synthesized from a plurality of film layers, and a receiving cavity is formed in the middle of the bag body, preferably between two of these layers. The receiving cavity can be used to store food. Additionally, at least one of the film layers comprises a degradation accelerator material, and polyethylene is also contained within the film material for the preparation and manufacture of the plurality of layers. The amount of the degradation accelerator material added is about 5 weight percent of the polyethylene. In addition, the synthesis of multiple film layers includes the sequential lamination of an inner film layer and an outer film layer prepared and manufactured, or an inner film layer, an intermediate film layer, and an outer film layer. A vacuum-sealable plastic bag including a bag body is manufactured by hot pressing and molding using a roller. In addition, in this exemplary embodiment, the polyethylene contained in the outer film layer material of the bag body is a mixture of HDPE (high-density polyethylene), LLDPE (linear low-density polyethylene), and metallocene linear low-density polyethylene (mLLDPE) in a weight ratio of 1:1:1, and is prepared and manufactured by co-extrusion, casting, blowing, and molding processes. The polyethylene contained in the inner film layer material of the bag body is a mixture of LDPE (low-density polyethylene) and LLDPE (linear low-density polyethylene) in a weight ratio of 1:1, and is prepared and manufactured by co-extrusion, casting, blowing, and molding processes. The film layer consists of two film layers or three or more film layers. When the film layer consists of three or more layers, the polyethylene contained in the intermediate film layer material is a mixture of LDPE (low-density polyethylene), LLDPE (linear low-density polyethylene), and metallocene linear low-density polyethylene (mLLDPE) in a weight ratio of 1:1:1, and is prepared and manufactured by co-extrusion, casting, blowing, and molding processes. The density of LLDPE (linear low-density polyethylene) is 0.918 g/cm³, and its struct