Packaging bag designed according to 3R concept

Abstract

The invention 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 of traditional moisture-proof packaging on functionality and environmental protection performance are successfully solved, the 3R principle is integrated into packaging design, and unification of reduction, reutilization and recoverability is achieved through an independent cavity, a replaceable structure and a single material system.

Description

Technical Field

[0001] The present invention relates to the field of packaging bags, and more particularly to a packaging bag designed based on the 3R concept. Background Art

[0002] In the field of packaging various products, the need for moisture-proof and humidity-proof is extremely common. Especially for humidity-sensitive products such as food, medicine, and electronic products, once they are affected by moisture, they are extremely likely to deteriorate, be damaged, etc., seriously affecting the product quality and service life.

[0003] When traditional packaging bags deal with the moisture-proof problem, there are mainly the following deficiencies: First, although some packaging bags are internally provided with drying desiccants, when the desiccant reaches the saturation state, it may release moisture in the reverse direction, increasing the risk of product moisture absorption. Second, the drying desiccants are usually placed in the same space and cannot flexibly distribute the moisture absorption capacity according to the different moisture requirements of different parts of the product. For example, in the packaging of some products with irregular shapes, some corner areas are difficult to be fully protected from moisture absorption. Third, when the drying desiccant fails, it is very difficult to replace it alone, and often the entire packaging bag needs to be discarded together, resulting in waste of resources and increased costs. Fourth, when the packaging bag is used and opened, it destroys the packaging bag and cannot be reused, and then is discarded, causing great waste. Summary of the Invention

[0004] The purpose of the present invention is to provide a packaging bag designed based on the 3R concept, so as to solve the problems that the drying desiccant in the existing packaging bag is easy to return moisture when contacting the product, the moisture absorption distribution is uneven, and it is difficult to replace the desiccant alone.

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

[0006] Provide a packaging bag designed based on the 3R concept, including: a first film material, a second film material, and a non-woven fabric material. Among them, the non-woven fabric material is sealed and bonded with the first film material to form a plurality of independent drying desiccant encapsulation cavities between the middle and the bottom inside the bag body. The drying desiccant encapsulation cavity is closed by a first zipper on the side close to the bottom of the bag to facilitate the replacement of the drying desiccant. The second film material is sealed and bonded with the first film material of the already sealed non-woven fabric material to form a product accommodation cavity, and is not sealed at one end opposite to the bottom of the bag to form a bag opening, and the bag opening is closed by a second zipper to facilitate the opening and sealing of the product accommodation cavity.

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

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

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

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

[0011] Preferably, the non-woven fabric material uses H1075B breathable material with a weight of 75 g / m 2 or M7001 breathable material with a weight of 70 g / m 2 .

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

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

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

[0015] Preferably, the first zipper chain for sealing the dry desiccant encapsulation cavity can be one or multiple, which is used to more conveniently replace the dry desiccant.

[0016] According to such a packaging bag provided by the present invention, the packaging bag body is composed of a product accommodation cavity and multiple independent dry desiccant encapsulation cavities. The product accommodation cavity is formed by heat-sealing and connecting the first film material and the second film material, ensuring no pollution to the product and having good flexibility and barrier properties. The seal of the bag mouth adopts a zipper buckle type for easy reuse. The dry desiccant encapsulation cavities are distributed on one side inside the cavity of the product accommodation cavity, and are formed by thermally pressing and sealing the non-woven fabric material and the first film material, being tightly connected to the product accommodation cavity while keeping each encapsulation cavity independent.

[0017] According to such a packaging bag provided by the present invention, the drying and moisture-absorbing agent encapsulation cavity is located on one side of the product accommodation cavity and close to the bottom of the cavity of the product accommodation cavity. The material of the surface in contact with the product in the drying and moisture-absorbing agent encapsulation cavity is selected as polyolefin nonwoven fabric material (a nonwoven fabric formed by melting HDPE through the flash evaporation method, processing it into continuous filaments and then thermally bonding), which can be breathable but not permeable to water, and can be firmly heat-sealed with a polyethylene film. Therefore, it can be easily heat-sealed and bonded with one side of the film material of the product accommodation cavity. The drying and moisture-absorbing agent encapsulation cavity is divided into multiple small cavities, and each small cavity is equipped with an openable and closable sealing port. The sealing port adopts a clip chain buckle-type component, which is convenient for opening and sealing operations. The drying and moisture-absorbing agent can be selected from common and efficient moisture-absorbing materials such as silica gel particles and calcium chloride. These moisture-absorbing agents are encapsulated in a breathable but water-impermeable drying and moisture-absorbing agent encapsulation cavity, which can effectively absorb the moisture in the product accommodation cavity and prevent the moisture-absorbing agent from leaking and contacting the product.

[0018] In the field of traditional packaging design, there has long been a technical prejudice, that is, it is considered a reasonable and efficient practice to place the drying and moisture-absorbing agent in the same space. This concept has caused designers to ignore the differences in humidity requirements of different parts of the product, as well as problems such as the reverse release of moisture after the moisture-absorbing agent is saturated and the difficulty of replacement.

[0019] However, the present invention breaks this technical prejudice and innovatively divides the drying and moisture-absorbing agent encapsulation cavity into multiple independent small cavities, which are distributed on the side and bottom of the product accommodation cavity. This design is not a simple structural change, but is based on an in-depth analysis of the moisture-proof requirements of the product, realizing that different parts have different sensitivities to humidity, and a unified placement of the moisture-absorbing agent cannot meet the requirement of precise moisture-proofing. Through the design of independent small cavities, the flexible distribution of the moisture-absorbing capacity is achieved, solving the key problem of uneven moisture absorption in traditional packaging, which is a major breakthrough in traditional design concepts. In addition, separating the moisture-absorbing function from the packaging main body to realize the replacement of the moisture-absorbing agent and the reuse of the packaging main body subverts the inherent design concept of "integration of the moisture-absorbing agent and the packaging".

[0020] Secondly, there is also a traditional concept that if a packaging bag adopts a repeatedly openable sealing structure (such as a zipper type), its sealing performance must be weaker than that of a one-time heat-sealed connection method, and its moisture-proof performance is not ideal. Therefore, in the fields with high requirements for sealing such as food and medicine, a destructive opening design has been relied on for a long time.

[0021] In response to this, the present invention adopts a clip chain snap - type sealing technology. At the openings of both the product accommodation cavity and the moisture absorbent packaging cavity, a micro clip chain is used for sealing (tooth pitch 1.2 mm, tensile strength ≥ 15 MPa). By optimizing the tooth shape structure (barb angle 30°, bite depth 0.5 mm), it is possible to open and close multiple times without damaging the sealing structure. Experimental data shows that after repeating the opening and closing 50 times, the water vapor transmission rate of the product accommodation cavity only increases by 3% (the increase rate of traditional zipper - type packaging is ≥ 30%), proving that the reusable sealing structure fully meets the high moisture - proof requirements.

[0022] Furthermore, the present invention also breaks through the environmental protection bottleneck of the long - existing problem that "multi - cavity structures are necessarily difficult to recycle". Existing multi - cavity packaging often uses multiple materials (such as plastic film + paper layer + glue), resulting in difficult recycling. Therefore, the industry generally believes that functionality and environmental protection are difficult to achieve simultaneously (for example, the Chinese utility model patent No. CN202321850739.2 uses an aluminum film composite structure with high recycling costs).

[0023] The present invention constructs the packaging bag using a single - material system. For the first time, HDPE film and polyolefin non - woven fabric (both are polyethylene - based materials) are selected as the core materials. Through the hot - melt sealing and ironing technology of flash - spun non - woven fabric and HDPE film (without glue), the integrated forming of the "breathable and moisture - absorbing cavity" and the "sealed accommodation cavity" is realized. The simplification of the material composition enables the recycling without complex sorting, and the regeneration utilization rate can reach over 95% after melting treatment, breaking the technical shackles of "multi - cavity = difficult to recycle".

[0024] During the creation process of the present invention, several technical problems were faced. First of all, how to ensure the tight connection between the dry moisture absorbent packaging cavity and the product accommodation cavity, while ensuring the air permeability and waterproofness of the packaging cavity, is a key issue. Traditional materials either have poor air permeability or are not firmly sealed and ironed with plastic film, unable to meet the requirements. After a large number of material selections and tests, polyolefin non - woven fabric materials (such as the H1075B material with a weight of 75 g / m 2 ) are finally selected. It is made by the flash - spun method, and its surface microstructure is uniform. It can not only ensure the passage of water vapor (air permeability ≥ 2000 g / m 2 ·24 h), but also block the penetration of liquid water, and the peeling strength of the seal and ironing with polyethylene (HDPE) film is ≥ 5 N / 15 mm, ensuring the cavity tightness and durability.

[0025] Secondly, how to achieve the convenient replacement of the dry moisture absorbent is also a challenge. A structure that is both convenient to open and seal and can ensure the tightness of the packaging cavity needs to be designed. The present invention adopts a clip chain snap - type sealing port, similar to the sealing design of the product accommodation cavity, which is convenient to operate and has reliable sealing. It solves the sealing problem during the replacement of the moisture absorbent, avoids the entry of moisture or leakage of the moisture absorbent during the replacement process, and ensures that the moisture - proof performance of the packaging bag is not affected.

[0026] In addition, in terms of ensuring the reusable nature of the packaging bag, traditional packaging bags are prone to structural damage after being opened and cannot be sealed again. Through the design of a clip-chain snap closure in the present invention, the packaging bag still maintains good sealing performance after being opened and sealed multiple times, solving the key problem of reuse and meeting the requirements of reuse in the 3R principle.

[0027] A packaging bag designed according to the 3R concept provided by the present invention has the following remarkable advantages compared with the prior art:

[0028] 1) By separately encapsulating a dry desiccant in the packaging bag, the moisture-proof and moisture-absorbing functions of the packaging can be achieved, improving the protection performance of the packaging bag for the product, extending the product shelf life, and improving the moisture absorption mechanism from passive moisture absorption in a single cavity to active zoned moisture absorption in multiple cavities, solving the problem of local moisture absorption of irregular products.

[0029] 2) Improved moisture-proof performance: The separately encapsulated dry desiccant can more precisely target different parts of the product for moisture absorption protection, avoiding local moisture absorption of the product caused by uneven moisture absorption. At the same time, the polyolefin non-woven fabric material has good air permeability and waterproofness, and will not have a reverse impact on the product after the desiccant is saturated, effectively extending the moisture-proof cycle of the product and ensuring product quality.

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

[0031] 4) Enhanced packaging adaptability: This separately encapsulable design is suitable for packaging products of various shapes, sizes, and different humidity sensitivities. The number, position, and amount of desiccant encapsulation cavities can be flexibly adjusted according to the product characteristics, greatly improving the versatility and adaptability of the packaging bag.

[0032] 5) Reusability and recyclability: The packaging bag is sealed with a clip-chain design, which is convenient to open and seal, does not damage the structure of the packaging bag, can be reused, greatly reducing resource waste and meeting the 3R principle. It can be opened and closed more than 50 times, and the sealing performance is ≥ 95%. The whole packaging bag is made of a single polyethylene-based material, and the recycling rate is increased to 95%.

[0033] In summary, through structural innovation and material optimization, the present invention provides a packaging bag designed based on the 3R concept, successfully resolving multiple contradictions in the functionality and environmental friendliness of traditional moisture-proof packaging. By means of an independent cavity, a replaceable structure, and a single material system, the 3R principle is integrated into the packaging design, fully conforming to the environmental protection "3R" principle of reuse, reduce, and recycle. The present invention has overcome technical bottlenecks such as the compatibility of desiccant encapsulation materials, the convenient replacement of the sealing structure, and the multi-cavity processing technology, providing a subversive solution for the packaging of humidity-sensitive products. It also promotes the transformation of the packaging industry from "single-use consumption" to "circular economy", with significant environmental, economic, and social values. It ensures that the product is always in a dry environment inside the packaging bag, and the packaging bag can be reused, enhancing the adaptability, economy, and environmental friendliness of the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. is a plan view of a packaging bag designed based on the 3R concept provided by a preferred embodiment of the present invention;

[0035] Figure 2 is as Figure 1 shown cross-sectional view of the packaging bag;

[0036] Among them, the meanings of the reference numerals are as follows:

[0037] 1, the first film material; 2, the second film material; 3, the non-woven fabric material; 4, the heat-sealing connection line; 5, the heat-sealing connection line; 6, the heat-sealing connection line; 7, the heat-sealing connection line; 8, the first zipper chain; 9, the second zipper chain; 12, the product accommodation cavity; 13, the dry desiccant encapsulation cavity; 22, the bag mouth; 23, the bag bottom. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following further describes the present invention in conjunction with specific embodiments. It should be understood that the following embodiments are only used to illustrate the present invention and not to limit 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 manufacturers. The reagents and materials used in the embodiments can be obtained from commercial sources unless otherwise specified.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0041] Combined with Figure 1 、 Figure 2 As shown, a packaging bag designed according to the 3R concept is provided according to a preferred embodiment of the present invention, which is composed of a first film material 1, a second film material 2, and a non-woven fabric material 3.

[0042] Among them, both the first film material 1 and the second film material 2 are made of HDPE (high-density polyethylene) film, and the material thickness is 60-100 μm. This film material has good flexibility and barrier properties. The non-woven fabric material 3 is made of polyolefin non-woven fabric manufactured by the flash evaporation method (a non-woven fabric formed by melting HDPE into continuous filaments and then thermally bonding), and the breathable material H1075B of 75 g / m 2 or the breathable material M7001 of 70 g / m 2 can be selected. The packaging bag product made of this material combination fully meets the NOP (single material structure, recyclable) requirements advocated in the art.

[0043] The non-woven fabric material 3 and the first film material 1 are sealed and bonded by hot stamping to form a plurality of independent drying and moisture-absorbing agent encapsulation cavities 13 in the inner region between the middle of the bag body and the bottom 23 of the bag. On the side close to the bottom 23 of the bag, that is, the opening of the drying and moisture-absorbing agent encapsulation cavity, it is closed by a first zipper 8 to facilitate the replacement of the drying and moisture-absorbing agent. The second film material 2 and the first film material 1 of the already hot-stamped non-woven fabric material 3 are hot-stamped and bonded to form a product accommodation cavity 12, and the end opposite to the bottom 23 of the bag is not hot-stamped to form a bag opening 22, that is, the opening of the product accommodation cavity. The bag opening 22 is closed by a second zipper 9 to facilitate the opening and sealing of the product accommodation cavity 12.

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

[0045] According to a preferred embodiment of the present invention, the tooth pitch of the first clamping chain 8 and the second clamping chain 9 is 1.2 mm, and the tensile strength ≥ 15 Mpa. The barb angle of the first clamping chain 8 and the second clamping chain 9 is 30°, and the biting depth is 0.5 mm. Experimental data shows that after repeating the opening and closing 50 times, the water vapor transmission rate of the product accommodation cavity 12 only increases by 3% (the increase rate of the traditional zipper packaging ≥ 30%), proving that the repeatable sealing structure fully meets the high moisture-proof requirements.

[0046] Preferably, the first clamping chain 8 for sealing the drying and moisture-absorbing agent encapsulation cavity can be one or multiple to separately seal each drying and moisture-absorbing agent encapsulation cavity, which more conveniently realizes the replacement of the drying and moisture-absorbing agent.

[0047] For the packaging bag provided according to the above preferred embodiment, the manufacturing process is described as follows:

[0048] First, the non-woven fabric material 3 and the first film material 1 are sealed and ironed and bonded to form a sealing and ironing connection line 4 and a sealing and ironing connection line 5. Multiple independent drying and moisture-absorbing agent encapsulation cavities 13 are formed through the interval of the sealing and ironing connection line 4. A sealing opening is reserved on one side of the drying and moisture-absorbing agent encapsulation cavity 13 close to the bag bottom 23, and a snap-type sealing component for installing the first clamping chain 8 is installed. Then, the second film material 2 and the first film material 1 of the already sealed and ironed non-woven fabric material 3 are sealed and ironed and bonded to form a sealing and ironing connection line 6 on both sides of the bag body. At the bag bottom 23, a sealing and ironing connection line 7 is formed through the sealing and ironing connection of the non-woven fabric material 3 and the plastic film 2 to form a product accommodation cavity 12. At the same time, at the bag mouth 22, a snap-type sealing component for installing the second clamping chain 9 is installed, which can conveniently open and seal the product accommodation cavity 12.

[0049] For the packaging bag provided according to the above preferred embodiment, the usage method is described as follows:

[0050] Product packaging: Put the product to be packaged into the product accommodation cavity 12 and seal the second clamping chain 9 well. According to the humidity requirements of the product and the shape characteristics of the product, determine the usage status of each drying and moisture-absorbing agent encapsulation cavity 13. If certain parts have higher humidity requirements, the dosage of the moisture-absorbing agent in the drying and moisture-absorbing agent encapsulation cavity 13 near this part can be appropriately increased. For products with replaceable accommodation cavities, the packaging of the product can be reused.

[0051] Desiccant replacement: During the storage of the product, regularly check the state of the desiccant in the dry desiccant encapsulation cavity 13 (such as the color change of the silica gel desiccant after absorbing moisture) to determine whether it has failed. When it is found that the desiccant in a certain encapsulation cavity has failed, open the first clip chain 8 of the seal of the encapsulation cavity, take out the used dry desiccant, replace it with a new one, and then reseal the first clip chain 8 to continuously provide a dry environment for the product.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various changes can be made to the above embodiments of the present invention. All simple, equivalent changes and modifications made according to the claims and the content of the specification of the present invention application fall within the scope of the claims of the present invention patent. Those not described in detail in the present invention are all conventional technical contents.

Claims

1. A packaging bag designed with the 3R concept, characterized in that, Comprising: A first film material, a second film material, and a non-woven fabric material. Among them, the non-woven fabric material is heat-sealed and bonded to the first film material to form a plurality of independent drying desiccant encapsulation cavities between the middle and the bottom inside the bag body. The drying desiccant encapsulation cavities are closed by a first zip chain on the side close to the bottom of the bag to facilitate the replacement of the drying desiccant. The second film material is heat-sealed and bonded to the first film material of the heat-sealed non-woven fabric material to form a product accommodation cavity, and is not heat-sealed at one end opposite to the bottom of the bag to form a bag mouth, and the bag mouth is closed by a second zip chain to facilitate the opening and sealing of the product accommodation cavity.

2. The packaging bag designed according to the 3R concept described in claim 1, characterized in that, Taking the direction from the bag mouth to the bottom of the bag as the length direction, a plurality of independent drying desiccant encapsulation cavities extend along the length direction, and each adjacent drying desiccant encapsulation cavity is separated by a heat-sealed connecting line.

3. The packaging bag designed according to the 3R concept described in claim 1, characterized in that, The first film material, the second film material, and the non-woven fabric material are made of a single material, which is beneficial to the recycling and reuse of the packaging bag.

4. The packaging bag designed according to the 3R concept as claimed in claim 1, wherein The first film material and the second film material are made of high-density polyethylene film materials, and the non-woven fabric material is made of polyolefin non-woven fabric materials produced by flash spinning technology.

5. The packaging bag designed according to the 3R concept described in claim 1, characterized in that, The thickness of the first film material and the second film material is 60 - 100 μm.

6. The packaging bag designed according to the 3R concept as claimed in claim 1, wherein The non-woven fabric material uses the H1075B breathable material of 75 g / m 2 or the M7001 breathable material of 70 g / m 2 .

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

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

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

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

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