Packaging bag designed according to 3R concept

Abstract

The utility model discloses a packaging bag designed according to the 3R concept, which comprises a first thin film material, a second thin film material and a non-woven fabric material, the non-woven fabric material and the first thin film material are bonded through sealing and ironing, and a plurality of independent dry moisture absorbent packaging cavities are formed between the middle part of the inner side of a bag body and the bag bottom. The side, close to the bag bottom, of the dry moisture absorbent packaging cavity is sealed through a first clamping chain so that the dry moisture absorbent can be conveniently replaced, the second thin film material and the first thin film material of the sealed non-woven fabric material can be sealed and bonded to form a product containing cavity, and the end, opposite to the bag bottom, of the second thin film material is not sealed to form a bag opening. According to the packaging bag designed according to the 3R concept, multiple contradictions between functionality and environmental protection of traditional moisture-proof packaging are successfully solved, the 3R principle is integrated into packaging design, and the unification of reduction, reutilization and recoverability is achieved through an independent cavity, a replaceable structure and a single material system.

Description

Technical Field

[0001] This utility model relates to the field of packaging bags, and more specifically to a packaging bag designed based on the 3R concept. Background Technology

[0002] In the packaging of various products, the need for moisture and humidity protection is extremely common. In particular, for products that are sensitive to humidity, such as food, pharmaceuticals, and electronic products, once exposed to moisture, they are prone to deterioration and damage, which seriously affects product quality and lifespan.

[0003] Traditional packaging bags have several shortcomings in addressing moisture protection: First, while some bags contain desiccant, once saturated, it may release moisture, increasing the risk of product dampness. Second, desiccant is typically placed in a single space, making it difficult to distribute its absorption capacity according to the varying humidity requirements of different parts of the product. For example, in irregularly shaped packaging, certain corners may not receive adequate moisture protection. Third, once the desiccant becomes ineffective, it is difficult to replace it individually; often, the entire bag must be discarded, resulting in resource waste and increased costs. Fourth, once the bag is opened after use, it is damaged and cannot be reused, leading to significant waste. Utility Model Content

[0004] The purpose of this invention is to provide a packaging bag designed with the 3R concept, thereby solving the problems of easy moisture return, uneven moisture distribution, and difficulty in replacing the desiccant in existing packaging bags when it comes into contact with the product.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A packaging bag designed according to the 3R concept is provided, comprising: a first film material, a second film material, and a nonwoven fabric material. The nonwoven fabric material and the first film material are bonded together by heat sealing to form multiple independent desiccant encapsulation cavities from the middle of the inner side of the bag to the bottom of the bag. The desiccant encapsulation cavities are closed by a first zipper on the side near the bottom of the bag to facilitate the replacement of the desiccant. The second film material is bonded together with the first film material that has been heat sealed to form a product receiving cavity. The end opposite to the bottom of the bag is not heat sealed to form a bag opening, which is closed by a second zipper to facilitate the opening and sealing of the product receiving cavity.

[0007] Preferably, with the direction from the bag opening to the bottom of the bag as the length direction, multiple independent desiccant encapsulation cavities extend along the length direction, and each adjacent desiccant encapsulation cavity is separated by a sealing connection line.

[0008] Preferably, the first film material, the second film material, and the nonwoven fabric material are made of a single material, which is conducive to the recycling and reuse of the packaging bag.

[0009] Preferably, the first and second film materials are made of high-density polyethylene film material, and the nonwoven fabric material is made of polyolefin nonwoven fabric material produced by flash evaporation technology.

[0010] Preferably, the thickness of the first thin film material and the second thin film material is 60 to 100 μm.

[0011] Preferably, the nonwoven fabric material uses 75g / m 2 H1075B breathable material or 70g / m 2 M7001 breathable material.

[0012] Preferably, the number of desiccant encapsulation cavities is 3 to 10.

[0013] Preferably, the tooth pitch of the first and second chain clips is 1.2 mm, and the tensile strength is ≥15 MPa.

[0014] Preferably, the barb angle of the first and second chain clips is 30° and the engagement depth is 0.5mm.

[0015] Preferably, the first chain for sealing the desiccant encapsulation cavity can be one or more chains, to facilitate the replacement of the desiccant.

[0016] According to the present invention, the packaging bag consists of a product-containing cavity and multiple independent desiccant encapsulation cavities. The product-containing cavity is formed by heat sealing a first film material and a second film material, ensuring no contamination of the product and providing good flexibility and barrier properties. The bag opening is sealed with a zipper snap-on closure for easy reuse. The desiccant encapsulation cavities are located on one side of the product-containing cavity and are formed by heat sealing a non-woven fabric material with the first film material, ensuring a tight connection with the product-containing cavity while maintaining the independence of each encapsulation cavity.

[0017] According to the packaging bag provided by this utility model, the desiccant encapsulation cavity is located on one side of the product receiving cavity and near the bottom of the cavity. The material of the desiccant encapsulation cavity in contact with the product is a polyolefin nonwoven fabric (made by flash evaporation technology, where HDPE is processed into continuous filaments through hot melting and then thermally bonded). This fabric is breathable but waterproof and can be firmly sealed to a polyethylene film, thus easily sealing and bonding to one side of the film material in the product receiving cavity. The desiccant encapsulation cavity is divided into multiple small cavities, each equipped with an openable and closable sealing opening using a chain-link snap-on component for easy opening and sealing. The desiccant can be a common and highly efficient moisture-absorbing material such as silica gel particles or calcium chloride. These desiccants are encapsulated within the breathable but waterproof desiccant encapsulation cavity, effectively absorbing moisture from the product receiving cavity and preventing leakage of the desiccant into the product.

[0018] In the field of traditional packaging design, there has long been a technological bias that considers placing desiccant in the same space to be a reasonable and efficient practice. This concept has led designers to overlook the different humidity requirements of different parts of the product, as well as problems such as the desiccant releasing moisture back after saturation and the difficulty in replacing it.

[0019] However, this invention breaks through this technological prejudice by innovatively dividing the desiccant encapsulation cavity into multiple independent small cavities, distributed on the sides and bottom of the product's containing cavity. This design is not a simple structural change, but rather based on an in-depth analysis of the product's moisture-proof requirements. It recognizes that different parts have varying sensitivities to humidity, and that uniformly placing the desiccant cannot meet the requirements for precise moisture protection. Through the design of independent small cavities, flexible distribution of moisture absorption capacity is achieved, solving the key problem of uneven moisture absorption in traditional packaging, representing a significant breakthrough in traditional design concepts. Furthermore, separating the moisture-absorbing function from the main packaging body allows for the replacement of the desiccant and the reuse of the main packaging body, overturning the inherent design thinking of "integrating the desiccant and packaging."

[0020] Secondly, there is a traditional view that if packaging bags use a resealable structure (such as a zipper), their sealing performance will inevitably be weaker than that of a one-time heat-sealing connection method, and their moisture-proof performance will not be ideal. Therefore, food, pharmaceutical and other fields with high requirements for sealing have long relied on destructive opening designs.

[0021] To address this issue, this invention employs a chain-link snap-on sealing technology. Miniature chain-link seals (1.2mm tooth pitch, tensile strength ≥15MPa) are used at the openings of both the product containment cavity and the desiccant packaging cavity. By optimizing the tooth structure (30° hook angle, 0.5mm engagement depth), repeated opening and closing do not damage the sealing structure. Experimental data shows that after 50 repeated openings and closings, the water vapor permeability of the product containment cavity increases by only 3% (compared to ≥30% for traditional zipper packaging), proving that the resealable structure fully meets high moisture-proof requirements.

[0022] Furthermore, this utility model also breaks through the long-standing environmental bottleneck that "multi-cavity structures are inevitably difficult to recycle." Existing multi-cavity packaging often makes recycling difficult due to the use of multiple materials (such as plastic film + paper layer + glue). Therefore, the industry generally believes that functionality and environmental protection are difficult to achieve simultaneously (for example, Chinese utility model patent CN202321850739.2 uses an aluminum film composite structure, which has high recycling costs).

[0023] This invention utilizes a single-material system to construct the packaging bag. For the first time, HDPE film and polyolefin nonwoven fabric (both polyethylene-based materials) are selected as the core materials. A flash-steaming method and hot-melt sealing technology (without glue) are used to integrate the "breathable and moisture-absorbing cavity" and the "sealed containment cavity." The single-material composition eliminates the need for complex sorting during recycling, and the recyclability rate after melt treatment can reach over 95%, breaking the technological constraint that "multiple cavities = difficult recycling."

[0024] Several technical challenges were encountered during the creation of this utility model. Firstly, ensuring a tight connection between the desiccant encapsulation cavity and the product containment cavity, while simultaneously guaranteeing the encapsulation cavity's breathability and waterproofness, was a critical issue. Traditional materials either had poor breathability or failed to seal firmly to the plastic film, thus failing to meet the requirements. After extensive material screening and testing, a polyolefin nonwoven fabric material (such as 75g / m²) was ultimately selected. 2 The H1075B material is manufactured using flash evaporation technology. Its surface microstructure is uniform, ensuring water vapor permeability (≥2000g / m³). 2 It can block liquid water penetration (24h) and has a heat-sealing peel strength of ≥5N / 15mm with polyethylene (HDPE) film, ensuring the cavity's sealing and durability.

[0025] Secondly, achieving convenient replacement of the desiccant is also a challenge. A structure needs to be designed that is both easy to open and seal while ensuring the airtightness of the packaging cavity. This invention adopts a chain-link snap-on sealing port, similar to the sealing design of the product's containing cavity. It is easy to operate, provides a reliable seal, solves the sealing problem during desiccant replacement, prevents moisture from entering or desiccant from leaking during the replacement process, and ensures that the moisture-proof performance of the packaging bag is not affected.

[0026] Furthermore, regarding ensuring the reusability of packaging bags, traditional packaging bags are easily damaged after opening and cannot be resealed. This utility model, through its chain-link snap-lock sealing design, ensures that the packaging bag maintains good sealing performance even after multiple openings and resealings, solving the key problem of reuse and meeting the reuse requirement of the 3R principle.

[0027] The packaging bag designed according to the 3R concept provided by this utility model has the following significant advantages over the prior art:

[0028] 1) By separately sealing the desiccant inside the packaging bag, the moisture-proof and moisture-absorbing functions of the packaging can be realized, improving the protective performance of the packaging bag for the product, extending the product's shelf life, and improving the moisture absorption mechanism from passive moisture absorption in a single cavity to active moisture absorption in multiple cavities, solving the problem of localized moisture absorption in irregular products.

[0029] 2) Improved moisture-proof performance: Separately packaged desiccant can more precisely target different parts of the product for moisture absorption and protection, avoiding localized dampness caused by uneven moisture absorption. At the same time, the polyolefin nonwoven fabric material has good breathability and waterproofness, and the desiccant will not have a reverse effect on the product after it becomes saturated, effectively extending the product's moisture-proof period and ensuring product quality.

[0030] 3) Convenient replacement of desiccant: When the desiccant in a certain desiccant packaging cavity fails, the user can directly open the seal of the corresponding packaging cavity to replace it with a new desiccant without replacing the entire packaging bag, reducing usage costs and resource waste. By replacing only the desiccant granules, material consumption is reduced by more than 80%.

[0031] 4) Enhanced Packaging Adaptability: This resealable design is suitable for products of various shapes, sizes, and varying humidity sensitivities. The number, position, and quantity of desiccant packaging cavities can be flexibly adjusted according to product characteristics, greatly improving the versatility and adaptability of the packaging bags.

[0032] 5) Reusable and recyclable: The packaging bag uses a zipper seal design, which is convenient to open and seal without damaging the structure of the bag. It can be reused, greatly reducing resource waste and conforming to the 3R principle. It can be opened and closed more than 50 times with a sealing performance of ≥95%. The entire packaging bag is made of a single polyethylene base material, increasing the recycling rate to 95%.

[0033] In summary, this utility model, through structural innovation and material optimization, provides a packaging bag designed with the 3R concept, successfully resolving multiple contradictions between functionality and environmental protection in traditional moisture-proof packaging. By integrating the 3R principles into the packaging design through an independent cavity, replaceable structure, and a single material system, it fully complies with the environmentally friendly "3R" principles of Reuse, Reduce, and Recycle. This utility model overcomes technical bottlenecks such as the compatibility of desiccant encapsulation materials, convenient replacement of sealing structures, and multi-cavity processing technology, providing a disruptive solution for moisture-sensitive product packaging. It also promotes the transformation of the packaging industry from "disposable consumption" to a "circular economy," demonstrating significant environmental, economic, and social benefits. It ensures that the product remains in a dry environment inside the packaging bag, and the packaging bag is reusable, improving its adaptability, economy, and environmental friendliness. Attached Figure Description

[0034] Figure 1 This is a plan view of a packaging bag designed according to the 3R concept of a preferred embodiment of the present utility model;

[0035] Figure 2 Is it like this? Figure 1 A cross-sectional view of the packaging bag shown;

[0036] The meanings of the reference numerals in the attached figures are as follows:

[0037] 1. First film material; 2. Second film material; 3. Nonwoven fabric material; 4. Sealing connection line; 5. Sealing connection line; 6. Sealing connection line; 7. Sealing connection line; 8. First zipper; 9. Second zipper; 12. Product receiving cavity; 13. Desiccant sealing cavity; 22. Bag opening; 23. Bag bottom. Detailed Implementation

[0038] The present invention will be further described below with reference to specific embodiments. It should be understood that the following embodiments are for illustrative purposes only and not for limiting the scope of the present invention. Unless otherwise specified, the technical means used in the embodiments are conventional operations in the art, or experimental methods recommended by the instrument and equipment manufacturer. Unless otherwise specified, the reagents and materials used in the embodiments are commercially available.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Combination Figure 1 , Figure 2 As shown, a packaging bag designed according to the 3R concept in a preferred embodiment of the present invention is composed of a first film material 1, a second film material 2, and a nonwoven fabric material 3.

[0042] Both the first film material 1 and the second film material 2 are made of HDPE (high-density polyethylene) film with a thickness of 60-100 μm. This film material has good flexibility and barrier properties. The nonwoven fabric material 3 is a polyolefin nonwoven fabric (made from HDPE that has been hot-melted into continuous filaments and then thermally bonded) manufactured using flash evaporation technology. A 75 g / m³ g / m³ material can be selected. 2 H1075B breathable material or 70g / m 2 The M7001 breathable material. Packaging bags made from this material fully comply with the NOP (Non-Original Material Structure, Recyclable) requirements advocated in this field.

[0043] Nonwoven fabric material 3 and first film material 1 are heat-sealed together to form multiple independent desiccant encapsulation cavities 13 in the internal area between the middle of the bag body and the bottom 23. The desiccant encapsulation cavity 13, located near the bottom 23 (i.e., the cavity opening), is sealed by a first chain 8 for easy replacement of the desiccant. Second film material 2 is heat-sealed together with the first film material 1 of the heat-sealed nonwoven fabric material 3 to form a product receiving cavity 12. The end opposite the bottom 23 is not heat-sealed, forming a bag opening 22 (i.e., the product receiving cavity opening). The bag opening 22 is sealed by a second chain 9 to facilitate the opening and sealing of the product receiving cavity 12.

[0044] According to this preferred embodiment, with the direction from the bag opening 22 to the bag bottom 23 as the length direction, multiple independent desiccant encapsulation cavities 13 extend along the length direction, and each adjacent desiccant encapsulation cavity 13 is separated by a sealing connection line 4. In this embodiment, there are a total of eight independent desiccant encapsulation cavities 13. However, it should be understood that this is only an example and not a limitation, and the number of desiccant encapsulation cavities 13 can be adjusted according to actual conditions.

[0045] According to a preferred embodiment of this utility model, the tooth pitch of the first zipper 8 and the second zipper 9 is 1.2 mm, and the tensile strength is ≥15 MPa. The barb angle of the first zipper 8 and the second zipper 9 is 30°, and the engagement depth is 0.5 mm. Experimental data shows that after 50 repeated opening and closing cycles, the water vapor permeability of the product cavity 12 increases by only 3% (compared to ≥30% for traditional zipper packaging), proving that the resealable structure fully meets the high moisture-proof requirements.

[0046] Preferably, the first chain 8 for sealing the desiccant encapsulation cavity can be one or more chains used to individually seal each desiccant encapsulation cavity, making it easier to replace the desiccant.

[0047] The manufacturing process of the packaging bag provided by the above preferred embodiment is described below:

[0048] First, the nonwoven fabric material 3 and the first film material 1 are heat-sealed together to form heat-sealing connection lines 4 and 5. Multiple independent desiccant encapsulation cavities 13 are formed through the intervals of the heat-sealing connection lines 4. A sealing opening is reserved on the side of the desiccant encapsulation cavity 13 near the bottom 23 of the bag, and a snap-on sealing component of the first clamping chain 8 is installed. Then, the second film material 2 is heat-sealed together with the first film material 1 of the heat-sealed nonwoven fabric material 3 to form heat-sealing connection lines 6 on both sides of the bag body. At the bottom 23 of the bag, the nonwoven fabric material 3 is heat-sealed together with the plastic film 2 to form a heat-sealing connection line 7, forming a product receiving cavity 12. At the same time, a snap-on sealing component of the second clamping chain 9 is installed at the bag opening 22, which facilitates the opening and sealing of the product receiving cavity 12.

[0049] The method of using the packaging bag provided in the above preferred embodiment is as follows:

[0050] Product Packaging: Place the product to be packaged into the product receiving cavity 12 and seal the second chain 9. Determine the usage status of each desiccant encapsulation cavity 13 based on the product's humidity requirements and shape characteristics. If certain areas have higher humidity requirements, the amount of desiccant in the desiccant encapsulation cavity 13 near those areas can be appropriately increased. Products in replaceable receiving cavities can have their packaging reused.

[0051] Desiccant Replacement: During product storage, periodically check the status of the desiccant in the desiccant encapsulation cavity 13 (e.g., color change of the silica gel after absorbing moisture) to determine if it has failed. When a desiccant in a certain encapsulation cavity is found to have failed, open the first clamping chain 8 of the sealing opening of that encapsulation cavity, remove the used desiccant, replace it with a new desiccant, and then reseal the first clamping chain 8 to continuously provide a dry environment for the product.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various variations can be made to the above embodiments of this utility model. All simple and equivalent changes and modifications made based on the claims and description of this utility model application fall within the protection scope of the claims of this utility model patent. Any aspects not described in detail in this utility model are conventional technical content.

Claims

1. A packaging bag designed according to the 3R concept, characterized in that, include: The bag contains a first film material, a second film material, and a nonwoven fabric material. The nonwoven fabric material and the first film material are bonded together by heat sealing to form multiple independent desiccant encapsulation cavities between the middle and the bottom of the bag. The desiccant encapsulation cavities are closed by a first zipper on the side near the bottom of the bag to facilitate the replacement of the desiccant. The second film material is bonded together with the first film material, which has been heat sealed with the nonwoven fabric material, to form a product receiving cavity. The bag opening is not heat sealed at the end opposite to the bottom of the bag and is closed by a second zipper to facilitate the opening and sealing of the product receiving cavity.

2. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, With the direction from the bag opening to the bottom of the bag as the length direction, multiple independent desiccant encapsulation cavities extend along the length direction, and each adjacent desiccant encapsulation cavity is separated by a sealing connection line.

3. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The first film material, the second film material, and the nonwoven fabric material are made from a single material, which facilitates the recycling and reuse of the packaging bag.

4. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The first and second film materials are made of high-density polyethylene film material, and the nonwoven fabric material is made of polyolefin nonwoven fabric material produced by flash evaporation technology.

5. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The thicknesses of the first and second thin film materials are 60–100 μm.

6. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The nonwoven fabric material uses 75g / m 2 H1075B breathable material or 70g / m 2 M7001 breathable material.

7. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The number of desiccant encapsulation cavities is 3 to 10.

8. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The tooth pitch of the first and second chain clips is 1.2 mm, and the tensile strength is ≥15 MPa.

9. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The barb angle of the first and second chain clips is 30°, and the engagement depth is 0.5mm.

10. The packaging bag designed according to the 3R concept as described in claim 1, characterized in that, The first chain of the sealing desiccant encapsulation cavity is one or more chains.

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