Degradable packaging bag and drying bag

Abstract

The utility model discloses a degradable packaging bag and a drying bag, which are formed by kraft paper serving as a base layer and a biological film arranged on the inner side surface of the base layer, the biological film is hot-pressed on the base layer, and the biological film is one of polylactic acid or poly (butylene succinate). The degradable polylactic acid or poly (butylene succinate) biofilm layer is arranged on the inner side face of the kraft paper in a hot pressing mode, and the non-plastic drying agent arranged in the packaging bag is matched, so that the drying bag can be completely degraded after being used, and no burden is caused to the natural environment.

Description

Technical Field

[0001] The utility model relates to the field of dry packaging, in particular to a degradable packaging bag and a dry bag. Background Art

[0002] As a desiccant with high moisture absorption rate, high hygroscopicity desiccant bag is widely used in packaging and ocean transportation in industries such as food, medicine, clothing, furniture, etc. At present, the packaging paper used for high hygroscopicity desiccant in the market is mainly DuPont paper and non-woven fabrics. The above packaging paper is made of plastic polymers such as spunbond polyethylene or polypropylene through a unique process. After use, it cannot be recycled. The plastic material is discarded in the natural environment and cannot be degraded by itself, which has caused a huge burden on the natural environment. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a degradable packaging bag and a desiccant to achieve the purpose of environmental protection and degradability of the desiccant bag.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A degradable packaging bag is composed of kraft paper as a base layer and a biological film arranged on the inner side of the base layer. The biological film is hot-pressed on the base layer and is one of polylactic acid and polybutylene succinate.

[0006] Furthermore, the weight of the base layer ranges from 30 to 150 grams, and the weight of the biofilm ranges from 20 to 80 grams.

[0007] Furthermore, the base layer weighs 100 grams, and the biofilm weighs 60 grams.

[0008] Furthermore, the kraft paper is slightly wrinkled kraft paper.

[0009] A dry bag comprises the above-mentioned degradable packaging bag.

[0010] Furthermore, a non-plastic moisture absorbent and a water-locking agent are provided in the packaging bag.

[0011] Furthermore, the desiccant is any two of silica gel, calcium chloride, calcium sulfate, activated carbon, activated alumina, magnesium chloride, molecular sieve and montmorillonite clay.

[0012] Furthermore, the moisture absorbent is any two of calcium chloride, magnesium chloride and montmorillonite clay.

[0013] Furthermore, the water-locking agent is starch resin or magnesium oxide.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a degradable packaging bag and a desiccant bag, wherein a degradable biological film layer is arranged on the inner side of kraft paper, and the film layer is laminated by a hot pressing process using the thermoplasticity of the film layer, and cooperates with a non-plastic desiccant in the packaging bag, so that the desiccant bag can be completely degraded after use, and will not cause a burden on the natural environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0017] Figure 1 It is a cross-sectional view of the packaging bag of the present utility model.

[0018] Figure 2 It is a structural schematic diagram of a drying bag of the utility model. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0020] The singular forms "a", "said" and "the" used in the specification include plural forms unless clearly indicated. The terms "include", "comprises" and "comprising" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features.

[0021] The following will describe exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in a variety of different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all drawings, the same reference numerals represent the same or functionally identical elements.

[0022] refer to Figure 1A degradable packaging bag is provided, wherein the packaging bag 100 uses kraft paper made of wood pulp as a base layer 10, and a degradable biofilm 20 is arranged on the inner side of the base layer 10. Since kraft paper is made of renewable resources, the biofilm 20 is selected from polylactic acid PLA or polybutylene succinate PBS. Since PLA and PBS have thermoplasticity, the heat deformation temperature of PBS is between 90-95°C, and the HDT of PLA is between 50-55°C. Therefore, the biofilm 20 can be adhered to the base layer 10, especially the inner side of the base layer 10, by a thermal process. In order to balance the performance and cost of the product, the base layer 10 has a unit weight of 30-150 grams per square unit, and the biofilm 20 has a unit weight of 20-80 grams per square unit. Preferably, the base layer 10 has a unit weight of 100 grams per square unit, and the biofilm 20 has a unit weight of 60 grams per square unit. In order to further improve the strength and durability of the base layer 10, the kraft paper is treated with a micro-wrinkle process so that it can be extended by 4% in the machine direction and 10% in the transverse direction when drying without breaking. This method improves the paper's elasticity and toughness, making it more suitable for packaging and other applications that require high strength and durability.

[0023] Figure 2 A desiccant bag 300 is shown, in which a desiccant 30 and a water-locking agent 40 are arranged in a packaging bag 100. The desiccant 30 is silica gel, calcium chloride, calcium sulfate, activated carbon, activated alumina, magnesium chloride, molecular sieve or montmorillonite clay, and most of these desiccants are solid. The water-locking agent 40 is starch resin or magnesium oxide.

[0024] Preferably, calcium chloride, magnesium chloride or montmorillonite clay is selected. Considering that calcium chloride, magnesium chloride or montmorillonite clay are all non-plastic desiccants, compared with silica gel desiccants, they have less impact on the environment. They are used with the degradable packaging bag 100 to achieve the effect that they can be completely degraded after use and will not burden the natural environment. Calcium chloride, magnesium chloride or montmorillonite clay can be powdered or granular according to the requirements of moisture absorption. The powdered shape provides a larger air contact area and can be filled into spaces of various shapes and sizes, making it very flexible in various applications; although the granular shape sacrifices volume, its shape is more stable and performs better in scenarios where precise humidity control is required.

[0025] The environmentally friendly and fully degradable high-hygroscopic desiccant product can be made into different shapes according to different usage occasions, or can be added with hooks, ropes, or attached with adhesive for more convenient use.

Claims

1. A degradable packaging bag, characterized in that: The invention is composed of kraft paper as a base layer and a biological film arranged on the inner side of the base layer. The biological film is hot pressed on the base layer and is one of polylactic acid and polybutylene succinate.

2. A degradable packaging bag as claimed in claim 1, characterized in that: The base layer has a grammage ranging from 30 to 150 grams, and the biofilm has a grammage ranging from 20 to 80 grams.

3. A degradable packaging bag as claimed in claim 2, characterized in that: The base layer weighs 100 grams, and the biofilm weighs 60 grams.

4. A degradable packaging bag as claimed in claim 1, characterized in that: The kraft paper is slightly wrinkled kraft paper.

5. A drying bag, characterized in that: A degradable packaging bag comprising any one of claims 1 to 4.

6. A drying bag as claimed in claim 5, characterized in that: The packaging bag is provided with a non-plastic moisture absorbent and a water-locking agent.

7. A drying bag according to claim 6, characterized in that: The desiccant is any two of calcium chloride, calcium sulfate, activated carbon, activated alumina, magnesium chloride, molecular sieve and montmorillonite clay.

8. A drying bag according to claim 7, characterized in that: The moisture absorbent is any two of calcium chloride, magnesium chloride and montmorillonite clay.

9. A drying bag according to claim 8, characterized in that: The water-locking agent is starch resin or magnesium oxide.

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