Intelligent sensing multi-layer barrier vacuum storage bag and preparation method

Abstract

The application discloses an intelligent perception multi-layer barrier vacuum storage bag and a preparation method thereof. The vacuum storage bag comprises a bag body, which is composed of an outer film layer and an inner film layer. The material of the outer film layer is cloth. An air extraction valve is heat-sealed on the inner film layer. The outer film layer is provided with a valve through hole at the position corresponding to the air extraction valve. A sealing zipper is heat-sealed on the open end of the inner film layer. The outer film layer is provided with a zipper opening at the position corresponding to the sealing zipper. A state perception sensor is embedded between the outer film layer and the inner film layer. A barrier layer is arranged on the surface of the inner film layer. The barrier layer is a multi-layer composite structure. The barrier layer is sequentially stacked with a first interface anchoring layer, a functional barrier intermediate layer and a second interface protection layer from inside to outside. A stress dispersion component is heat-sealed between the air extraction valve and the inner film layer. The application can improve the long-term barrier pressure maintaining performance of the vacuum storage bag, reduce the stress concentration in the air extraction valve area, and realize the visual perception of the vacuum state in the bag.

Description

Technical Field

[0001] This invention relates to the field of vacuum storage bag technology, and in particular to a smart sensing multi-layer barrier vacuum storage bag and its preparation method. Background Technology

[0002] Vacuum storage bags are packaging products that use vacuum sealing to compress the volume of stored items and isolate them from air and moisture. They are widely used in household clothing, quilts, down products, travel storage, and warehousing and transportation. With the improvement of residents' living standards and the increasing demand for home storage, long-term storage, and sophisticated packaging, vacuum storage bags not only need to have basic vacuum sealing functions, but also need to have high oxygen and moisture barrier properties, good mechanical strength, long pressure-holding life, and reusability. Therefore, vacuum storage bags are gradually developing from single-layer plastic films to multi-layer composite films, high-barrier composite films, and functional integration to meet the performance requirements of moisture protection, oxidation prevention, mildew prevention, and odor prevention for internal items during long-term storage.

[0003] Existing vacuum storage bags typically use polyethylene, polyamide, or other plastic films or multi-layer composite film structures, forming the bag body through heat sealing, and are equipped with an air extraction valve and a sealing zipper to achieve vacuuming and sealing. However, traditional barrier layers mostly use a single barrier material or a simple composite structure, with limited interfacial bonding between the barrier layer and the substrate. During long-term folding, bending, compression, and repeated vacuuming, microcracks, local delamination, or a decrease in barrier performance can easily occur due to interlayer stress concentration. This allows oxygen and moisture to gradually penetrate into the bag's interior, shortening the vacuum retention time and making it difficult to meet the needs of long-term storage.

[0004] Current vacuum storage bags are primarily designed for vacuuming and sealing performance, often lacking real-time monitoring capabilities for changes in the vacuum state and barrier properties within the bag. Users can only rely on visual changes such as whether the bag bulges to determine if there is a leak, making it difficult to detect early failures such as slow leaks or oxygen infiltration. This can lead to stored items becoming damp, oxidized, or developing mold before the problem is even noticed, affecting the preservation quality and increasing the uncertainty of use.

[0005] Therefore, how to provide a multi-layer self-healing barrier vacuum storage bag and its preparation method with high barrier performance, stable interface bonding, improved long-term pressure holding capacity, reduced stress concentration in the air extraction valve area, enhanced overall structural reliability, and real-time sensing of the bag's internal state, and suitable for mass production of fabric-plastic composite structures, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent sensing multi-layer barrier vacuum storage bag and its preparation method, which solves at least one of the above-mentioned technical problems. It can improve the long-term barrier and pressure-holding performance of the vacuum storage bag, reduce stress concentration in the area of ​​the air extraction valve, and realize the visual sensing of the vacuum state inside the bag.

[0007] The embodiments of the present invention are implemented as follows:

[0008] A smart sensing multi-layer barrier vacuum storage bag includes a bag body composed of an outer membrane layer and an inner membrane layer, wherein the outer membrane layer is made of fabric.

[0009] An air extraction valve is heat-sealed on the inner membrane layer, and a valve through hole is provided on the outer membrane layer at the position corresponding to the air extraction valve.

[0010] The inner membrane layer has a heat-sealed zipper at its open end, and the outer membrane layer has a zipper opening at the position corresponding to the zipper.

[0011] A state sensing sensor is embedded between the outer membrane layer and the inner membrane layer.

[0012] The surface of the inner membrane layer is provided with a barrier layer, which is a multi-layer composite structure. The barrier layer is composed of a first interface anchoring layer, a functional barrier intermediate layer, and a second interface protective layer stacked sequentially from the inside to the outside.

[0013] A stress-dispersing component is heat-sealed between the air extraction valve and the inner membrane layer.

[0014] In a preferred embodiment of the present invention, the above-mentioned intelligent sensing multi-layer barrier vacuum storage bag,

[0015] The first interface anchoring layer is made of modified polyethyleneimine.

[0016] The functional barrier interlayer is made of at least one of polyvinyl alcohol and silicon dioxide nanoparticles.

[0017] The second interface protective layer is made of polysilazane.

[0018] Its technical effect is that the first interface anchoring layer, the functional barrier intermediate layer, and the second interface protective layer form a multi-layer composite barrier structure, which can enhance the bonding strength between the barrier layer and the inner membrane layer, improve the oxygen and moisture barrier performance, and enhance the stability and durability of the barrier layer during repeated folding and vacuuming processes.

[0019] In a preferred embodiment of the present invention, the above-mentioned intelligent sensing multi-layer barrier vacuum storage bag,

[0020] The state sensing sensor is a flexible thin-film oxygen indicator sensor.

[0021] A transparent window is provided on the outer membrane layer.

[0022] The flexible thin-film oxygen indicator sensor is located at the transparent window.

[0023] Its technical advantages are as follows: the flexible thin-film oxygen indicator sensor, combined with the transparent window, can display the oxygen status inside the bag in real time, realize the visual monitoring of the vacuum status, and facilitate the timely detection of leaks or sealing failures.

[0024] In a preferred embodiment of the present invention, the above-mentioned intelligent sensing multi-layer barrier vacuum storage bag,

[0025] The stress dispersion component is a rigid stress dispersion ring, which is made of high-density polyethylene.

[0026] The diameter of the hard stress dispersion ring is 2 to 3 times the diameter of the base of the air extraction valve.

[0027] Its technical effect is that the rigid stress dispersion ring can disperse the local stress in the area around the air extraction valve, reduce the risk of membrane cracking and valve detachment, and improve the sealing reliability and service life of the air extraction valve installation part.

[0028] A method for preparing a smart sensing multi-layer barrier vacuum storage bag, comprising:

[0029] S100, the substrate film is subjected to surface corona treatment, and a first interface anchoring liquid, a barrier emulsion and an interface protection liquid are sequentially coated on the surface. The barrier emulsion contains inorganic nanoparticles. After drying, a multi-layer composite barrier layer is formed on the surface of the substrate film to obtain the inner film layer.

[0030] S200, a state sensing sensor is attached to the outer membrane layer's fabric material, and then bonded and cured with the inner membrane layer using an adhesive process to obtain a fabric-plastic composite membrane material with integrated sensors.

[0031] S300, a valve through hole is opened at a preset position on the fabric-plastic composite membrane material, a stress dispersion component is heat-sealed at the corresponding position on the inner membrane layer, a cut is made at the center of the stress dispersion component, and the air extraction valve is welded and installed on the stress dispersion component to obtain a membrane material with a reinforced air valve.

[0032] S400, the membrane material with the reinforced air valve is opened at the corresponding sealing zipper position, the sealing zipper is heat-sealed, and the edges and bottom are sealed to obtain a vacuum storage bag.

[0033] In a preferred embodiment of the present invention, in the above-described method for preparing the intelligent sensing multi-layer barrier vacuum storage bag, in step S100,

[0034] The substrate film is a PE film.

[0035] The barrier emulsion is a mixture formed by dispersing nano-sized silica particles in a polyvinyl alcohol emulsion.

[0036] The drying temperature is 60℃~90℃, and the drying tunnel moving speed is 40m / min~50m / min.

[0037] Its technical effect is that the combination of PE film and polyvinyl alcohol / nano silica barrier system, along with optimized drying, can form a uniform and dense barrier layer, improving the barrier performance and adhesion stability of the inner film layer.

[0038] In a preferred embodiment of the present invention, in the above-described method for preparing the intelligent sensing multi-layer barrier vacuum storage bag, in step S200,

[0039] The state sensing sensor contains a system of methylene blue, glucose, and sodium hydroxide.

[0040] The curing temperature is 45℃~60℃, and the curing time is 12h~36h.

[0041] Its technical advantages lie in the fact that the oxygen indicator system composed of methylene blue, glucose and sodium hydroxide, combined with the curing process, gives the sensor good stability and oxygen response performance.

[0042] In a preferred embodiment of the present invention, in the above-mentioned method for preparing the intelligent sensing multi-layer barrier vacuum storage bag, in step S200, the adhesive used in the adhesive bonding process is a hot melt adhesive, a water-based composite adhesive, or a polyurethane adhesive.

[0043] Its technical advantages are: by using hot melt adhesive, water-based composite adhesive or polyurethane adhesive for composite, the bonding strength between the fabric, sensor and inner membrane layer can be improved, and the overall stability of the composite membrane material can be guaranteed.

[0044] In a preferred embodiment of the present invention, in the above-described method for preparing the intelligent sensing multi-layer barrier vacuum storage bag, in step S300,

[0045] The heat-sealing stress-dispersing component is a high-density polyethylene ring.

[0046] When installing the air extraction valve through the valve through-hole, the high-density polyethylene ring is first heat-sealed on the surface of the inner membrane layer, and then the base of the air extraction valve is heat-melted and welded to the surface of the high-density polyethylene ring.

[0047] The technical effect is that the high-density polyethylene ring is first heat-sealed, and then the air extraction valve is welded, so that the valve load is borne by the stress-dispersing component, which can enhance the valve installation strength and improve airtightness and fatigue resistance.

[0048] In a preferred embodiment of the present invention, in the above-mentioned method for preparing a smart sensing multi-layer barrier vacuum storage bag, in step S400, when sealing the bottom and sealing the edges, the temperature of the sealing knife of the bag making machine is 150°C to 180°C.

[0049] When heat-sealing the sealing zipper, the temperature of the sealing knife on the bag making machine is 160℃~190℃.

[0050] Its technical effect is that by controlling the heat sealing temperature of the edge sealing and sealing zipper, the welding quality and sealing consistency of each heat-sealed part are improved, and the risk of air leakage caused by poor heat sealing is reduced.

[0051] The beneficial effects of the embodiments of the present invention are:

[0052] This invention discloses a smart sensing multi-layer barrier vacuum storage bag. By constructing a multi-layer composite barrier structure on the surface of the inner membrane layer, consisting of a first interface anchoring layer, a functional barrier intermediate layer, and a second interface protective layer, it effectively enhances the interfacial bonding between the barrier layer and the substrate, improving the overall stability and durability of the barrier layer. The first interface anchoring layer enhances the adhesion strength between the barrier layer and the inner membrane layer; the functional barrier intermediate layer effectively extends the penetration path of media such as oxygen and water vapor, improving the oxygen and moisture barrier performance of the bag; and the second interface protective layer further improves the abrasion resistance, folding resistance, and environmental adaptability of the barrier layer, reducing the risk of cracking, delamination, and performance degradation of the barrier layer during long-term use. This allows the vacuum storage bag to maintain a vacuum state for a longer period, improving the moisture-proof, oxidation-proof, and freshness-preserving effects of stored items.

[0053] This invention creates a stable stress transition structure in the vacuum valve area by setting a stress-dispersing component between the vacuum valve and the inner membrane layer. During vacuuming, transportation, and repeated use, it can effectively disperse the local stress generated around the valve, reduce the possibility of cracking, tearing, or deformation of the heat-sealing area and membrane material due to stress concentration, improve the structural strength and sealing reliability of the vacuum valve installation part, reduce the probability of air leakage, extend the service life of the vacuum storage bag, and improve the reliability of the product during repeated vacuuming.

[0054] This invention integrates a state-sensing sensor between the outer and inner membrane layers, along with a transparent window on the outer membrane layer, allowing users to visually observe changes in the oxygen or vacuum state inside the bag, thus achieving visualized monitoring of the vacuum maintenance status. Compared to traditional methods that rely on the bag's external bulge to determine leakage, this invention can detect abnormalities such as decreased sealing performance or oxygen infiltration earlier. This allows users to take timely measures such as re-vacuuming or repackaging, improving the convenience of storage management, reducing the risk of stored items becoming damp, moldy, or oxidized due to slow leakage, and enhancing the intelligent user experience of the product.

[0055] The method for preparing the intelligent sensing multi-layer barrier vacuum storage bag of this invention employs a layered coating process to form a multi-layer composite barrier layer. This is combined with fabric-plastic composite processes, sensor integration, stress-dispersing component installation, and reinforced welding of the extraction valve. The various process steps are logically connected, facilitating continuous and large-scale production. The integrated manufacturing of the multi-functional structure can be achieved without complex processing equipment, ensuring assembly accuracy between the barrier layer, sensor, and extraction valve, improving product consistency and yield, reducing production costs, and demonstrating promising prospects for industrial application. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown herein can generally be arranged and designed in various different configurations.

[0057] The first embodiment of the present invention provides a smart sensing multi-layer barrier vacuum storage bag, comprising a bag body composed of an outer membrane layer and an inner membrane layer, the outer membrane layer being made of fabric; an air extraction valve is heat-sealed on the inner membrane layer, and a valve through hole is provided on the outer membrane layer at the position corresponding to the air extraction valve; a sealing zipper is heat-sealed at the open end of the inner membrane layer, and a zipper opening is provided on the outer membrane layer at the position corresponding to the sealing zipper; a state sensing sensor is embedded between the outer membrane layer and the inner membrane layer; a barrier layer is provided on the surface of the inner membrane layer, the barrier layer being a multi-layer composite structure, wherein a first interface anchoring layer, a functional barrier intermediate layer, and a second interface protective layer are stacked sequentially from the inside to the outside of the barrier layer; a stress dispersion member is heat-sealed between the air extraction valve and the inner membrane layer.

[0058] Wherein, the first interface anchoring layer is made of modified polyethyleneimine; the functional barrier intermediate layer is made of at least one of polyvinyl alcohol and silica nanoparticles; and the second interface protective layer is made of polysilazane.

[0059] Its technical effect is that the first interface anchoring layer, the functional barrier intermediate layer, and the second interface protective layer form a multi-layer composite barrier structure, which can enhance the bonding strength between the barrier layer and the inner membrane layer, improve the oxygen and moisture barrier performance, and enhance the stability and durability of the barrier layer during repeated folding and vacuuming processes.

[0060] The state sensing sensor is a flexible thin-film oxygen indicator sensor; a transparent window is provided on the outer membrane layer; the flexible thin-film oxygen indicator sensor is located at the transparent window.

[0061] Its technical advantages are as follows: the flexible thin-film oxygen indicator sensor, combined with the transparent window, can display the oxygen status inside the bag in real time, realize the visual monitoring of the vacuum status, and facilitate the timely detection of leaks or sealing failures.

[0062] The stress dispersion component is a rigid stress dispersion ring, which is made of high-density polyethylene. The diameter of the rigid stress dispersion ring is 2 to 3 times the diameter of the base of the air extraction valve.

[0063] Its technical effect is that the rigid stress dispersion ring can disperse the local stress in the area around the air extraction valve, reduce the risk of membrane cracking and valve detachment, and improve the sealing reliability and service life of the air extraction valve installation part.

[0064] The second embodiment of the present invention provides a method for preparing a smart sensing multi-layer barrier vacuum storage bag, comprising: S100, subjecting a substrate film to surface corona treatment, sequentially coating the surface with a first interface anchoring liquid, a barrier emulsion, and an interface protective liquid, wherein the barrier emulsion contains inorganic nanoparticles, and after drying, forming a multi-layer composite barrier layer on the surface of the substrate film to obtain an inner film layer; S200, attaching a state sensing sensor to the fabric material of the outer film layer, bonding it to the inner film layer by an adhesive process and curing it to obtain a fabric-plastic composite film material with integrated sensor; S300, opening a valve through hole at a preset position on the fabric-plastic composite film material, heat-sealing a stress dispersion component at the corresponding position on the inner film layer, making a cut at the center of the stress dispersion component, and welding the air extraction valve onto the stress dispersion component to obtain a film material with a reinforced air valve; S400, opening a zipper opening at the corresponding position of the sealing zipper on the film material with the reinforced air valve, heat-sealing the sealing zipper, sealing the edges and bottom to obtain a vacuum storage bag.

[0065] In S100, the substrate film is a PE film; the barrier emulsion is a mixture formed by dispersing nano-sized silica particles in a polyvinyl alcohol emulsion; the drying temperature is 60℃~90℃, and the drying tunnel moving speed is 40m / min~50m / min.

[0066] Its technical effect is that the combination of PE film and polyvinyl alcohol / nano silica barrier system, along with optimized drying, can form a uniform and dense barrier layer, improving the barrier performance and adhesion stability of the inner film layer.

[0067] In S200, the state sensing sensor contains a system of methylene blue, glucose, and sodium hydroxide; the curing temperature is 45℃~60℃, and the curing time is 12h~36h.

[0068] Its technical advantages lie in the fact that the oxygen indicator system composed of methylene blue, glucose and sodium hydroxide, combined with the curing process, gives the sensor good stability and oxygen response performance.

[0069] In S200, the adhesive used in the bonding process is a hot melt adhesive, a water-based composite adhesive, or a polyurethane adhesive.

[0070] Its technical advantages are: by using hot melt adhesive, water-based composite adhesive or polyurethane adhesive for composite, the bonding strength between the fabric, sensor and inner membrane layer can be improved, and the overall stability of the composite membrane material can be guaranteed.

[0071] In S300, the heat-sealing stress-dispersing component is a high-density polyethylene ring; when installing the air extraction valve through the valve through hole, the high-density polyethylene ring is first heat-sealed on the surface of the inner membrane layer, and then the base of the air extraction valve is heat-melted and welded to the surface of the high-density polyethylene ring.

[0072] The technical effect is that the high-density polyethylene ring is first heat-sealed, and then the air extraction valve is welded, so that the valve load is borne by the stress-dispersing component, which can enhance the valve installation strength and improve airtightness and fatigue resistance.

[0073] In S400, when sealing the bottom and edges, the sealing blade temperature of the bag making machine is 150℃~180℃; when heat-sealing the sealing zipper, the sealing blade temperature of the bag making machine is 160℃~190℃.

[0074] Its technical effect is that by controlling the heat sealing temperature of the edge sealing and sealing zipper, the welding quality and sealing consistency of each heat-sealed part are improved, and the risk of air leakage caused by poor heat sealing is reduced.

[0075] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A smart sensing multi-layer barrier vacuum storage bag, characterized in that, Includes a bag body, which is composed of an outer membrane layer and an inner membrane layer, wherein the outer membrane layer is made of fabric; An air extraction valve is heat-sealed on the inner membrane layer, and a valve through hole is provided on the outer membrane layer at the position corresponding to the air extraction valve; The inner membrane layer has a heat-sealed zipper at its open end, and the outer membrane layer has a zipper opening at the position corresponding to the zipper. A state sensing sensor is embedded between the outer membrane layer and the inner membrane layer; The surface of the inner membrane layer is provided with a barrier layer, which is a multi-layer composite structure. The barrier layer is provided with a first interface anchoring layer, a functional barrier intermediate layer and a second interface protection layer stacked from the inside to the outside. A stress-dispersing component is heat-sealed between the air extraction valve and the inner membrane layer.

2. The intelligent sensing multi-layer barrier vacuum storage bag according to claim 1, characterized in that, The first interface anchoring layer is made of modified polyethyleneimine; The functional barrier interlayer is made of at least one of polyvinyl alcohol and silicon dioxide nanoparticles. The second interface protective layer is made of polysilazane.

3. The intelligent sensing multi-layer barrier vacuum storage bag according to claim 1, characterized in that, The state sensing sensor is a flexible thin-film oxygen indicator sensor; A transparent window is provided on the outer membrane layer; The flexible thin-film oxygen indicator sensor is located at the transparent window.

4. The intelligent sensing multi-layer barrier vacuum storage bag according to claim 1, characterized in that, The stress dispersion component is a rigid stress dispersion ring, which is made of high-density polyethylene. The diameter of the hard stress dispersion ring is 2 to 3 times the diameter of the base of the air extraction valve.

5. A method for preparing a smart sensing multi-layer barrier vacuum storage bag, characterized in that, include: S100, the substrate film is subjected to surface corona treatment, and a first interface anchoring liquid, a barrier emulsion and an interface protection liquid are sequentially coated on the surface. The barrier emulsion contains inorganic nanoparticles. After drying, a multi-layer composite barrier layer is formed on the surface of the substrate film to obtain the inner film layer. S200, a state sensing sensor is attached to the outer membrane layer fabric, and then bonded and cured to the inner membrane layer by an adhesive process to obtain a fabric-plastic composite membrane material with integrated sensor. S300, a valve through hole is opened at a preset position on the fabric-plastic composite membrane material, a stress dispersion component is heat-sealed at the corresponding position on the inner membrane layer, a cut is made at the center of the stress dispersion component, and the air extraction valve is welded and installed on the stress dispersion component to obtain a membrane material with a reinforced air valve. S400, the membrane material with the reinforced air valve is opened at the corresponding sealing zipper position, the sealing zipper is heat-sealed, and the edges and bottom are sealed to obtain a vacuum storage bag.

6. The method for preparing the intelligent sensing multi-layer barrier vacuum storage bag according to claim 5, characterized in that, In S100, The substrate film is a PE film; The barrier emulsion is a mixture formed by dispersing nano-sized silica particles in a polyvinyl alcohol emulsion. The drying temperature is 60℃~90℃, and the drying tunnel moving speed is 40m / min~50m / min.

7. The method for preparing the intelligent sensing multi-layer barrier vacuum storage bag according to claim 5, characterized in that, In S200, The state sensing sensor contains a system of methylene blue, glucose, and sodium hydroxide. The curing temperature is 45℃~60℃, and the curing time is 12h~36h.

8. The method for preparing the intelligent sensing multi-layer barrier vacuum storage bag according to claim 5, characterized in that, In S200, the adhesive used in the bonding process is a hot melt adhesive, a water-based composite adhesive, or a polyurethane adhesive.

9. The method for preparing the intelligent sensing multi-layer barrier vacuum storage bag according to claim 5, characterized in that, In S300, The heat-sealing stress dispersion component is a high-density polyethylene ring; When installing the air extraction valve through the valve through-hole, the high-density polyethylene ring is first heat-sealed on the surface of the inner membrane layer, and then the base of the air extraction valve is heat-melted and welded to the surface of the high-density polyethylene ring.

10. The method for preparing the intelligent sensing multi-layer barrier vacuum storage bag according to claim 5, characterized in that, In the S400, when sealing the bottom and edges, the sealing knife temperature of the bag making machine is 150℃~180℃; When heat-sealing the sealing zipper, the temperature of the sealing knife on the bag making machine is 160℃~190℃.