Humidity-controlling pad for sealing device and method for manufacturing the same

Abstract

The present invention provides a humidity-regulating pad for a sealing device and a manufacturing method thereof, which belongs to the field of humidity-regulating agents. The humidity-regulating pad is arranged in a sealing device and is used to regulate the humidity in the sealing device. It is characterized in that it comprises: a body-fitting film, a humidity-regulating sheet, a first anti-reverse osmosis composite membrane, a paper pad and a second anti-reverse osmosis composite membrane arranged in sequence from top to bottom, wherein the body-fitting film is breathable and can allow water vapor to pass through, the humidity-regulating sheet is used to absorb and release water to regulate humidity, and its area is smaller than that of the paper pad, and the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane are breathable and are used to prevent water from penetrating into the paper pad. The manufacturing method of the humidity-regulating pad of the present invention is as follows: a first anti-reverse osmosis composite membrane and a second anti-reverse osmosis composite membrane are respectively attached to both sides of the paper pad; a plurality of humidity-regulating sheets are evenly arranged on the first anti-reverse osmosis composite membrane; the body-fitting film is adsorbed on the surface of the humidity-regulating sheet by blistering; and the portion with the humidity-regulating sheet is cut into a predetermined shape.

Description

Technical Field

[0001] The invention belongs to the field of humidity control agents, and in particular relates to a humidity control pad for a sealing device and a manufacturing method thereof. Background Art

[0002] The preservation of food, medicine and goods requires a relatively high relative humidity in the storage environment, and a relatively stable humidity value is required. At present, most people use the moisture absorption and release characteristics of certain materials to control the humidity of the environment. This method has the advantages of energy saving, stable control and safety, and is suitable for stable control of humidity in a relatively closed small environment.

[0003] At present, most humidity control materials belong to the category of desiccant, which mainly has the drying function, that is, it can continuously absorb excess water vapor in the environment. Many industries such as food, daily necessities and medicine use desiccant. At present, most desiccant products are in granular form, packaged in breathable small bags, and placed at the bottom of the container for drying. However, this desiccant is difficult to dissipate heat, and the location limitation will also make it impossible to precisely control the humidity of some products such as medicines that require high humidity values, and it is necessary to reserve space for desiccant. At the same time, this form is also prone to problems such as desiccant leakage. Other forms of humidity control include humidity control sheets, but most humidity control sheets currently have unsatisfactory humidity control capabilities due to problems such as the air permeability of the packaging material.

[0004] In addition, membrane-structured products such as humidity-conditioning sheets are mostly manufactured by pressure compaction, but for layer structures containing liquids, this method of processing will cause liquid leakage. Some processing and manufacturing also use the blister method, but the current blister method is mostly to punch holes in the product, which will destroy the membrane structure and cause the liquid in the membrane to leak out. Summary of the invention

[0005] In order to solve the above problems, a humidity-conditioning pad for a sealing device is provided, and the present invention adopts the following technical solutions:

[0006] The present invention provides a humidity-regulating pad for a sealing device, which is arranged in the sealing device and is used to regulate the humidity in the sealing device. The pad is characterized in that it comprises: a body-fitting film, a humidity-regulating sheet, a first anti-reverse osmosis composite membrane, a paper pad and a second anti-reverse osmosis composite membrane arranged in sequence from top to bottom, wherein the body-fitting film is breathable and can allow water vapor to pass through, the humidity-regulating sheet is used to absorb and release water to regulate the humidity, and its area is smaller than that of the paper pad, and the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane are breathable and are used to prevent water from penetrating into the paper pad.

[0007] The humidity-conditioning pad for sealing device provided by the present invention may also have the following characteristics: the body-fitting film is a PE film or a SC film, which covers the humidity-conditioning sheet and a part of the first anti-reverse osmosis composite film by means of blister forming.

[0008] The humidity regulating pad for the sealing device provided by the present invention may also have the following characteristics, wherein the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane are layered structures, including anti-reverse osmosis layers and one or more breathable layers arranged in sequence, the anti-reverse osmosis layer is a PE breathable film or a PET breathable film, and the breathable layer is a non-woven fabric or paper.

[0009] The humidity-controlling pad for a sealing device provided by the present invention may also have the following characteristics: a pattern or text is printed on the surface of the second anti-reverse osmosis composite membrane adjacent to the paper pad.

[0010] The humidity regulating pad for sealing device provided by the present invention may also have the following characteristics: the sealing device has a cover, the area of ​​the paper pad is smaller than the area of ​​the inner side of the cover, and the second anti-reverse osmosis composite membrane is glued to the inner side of the cover.

[0011] The humidity-conditioning pad for a sealing device provided by the present invention may also have the following characteristics: the shape and area of ​​the paper pad match the inner side surface of the cover, and the paper pad is embedded in the cover.

[0012] The manufacturing method of the humidity regulating pad for the sealing device of any one of the above-mentioned items provided by the present invention is characterized in that it includes: respectively pasting a first anti-reverse osmosis composite membrane and a second anti-reverse osmosis composite membrane on both sides of a paper pad; evenly arranging a plurality of humidity regulating sheets on the first anti-reverse osmosis composite membrane; heating and softening the body film, covering all the humidity regulating sheets from the side of the humidity regulating sheets away from the first anti-reverse osmosis composite membrane, and vacuuming from the side of the second anti-reverse osmosis composite membrane away from the paper pad, thereby adsorbing the body film on the surface of the humidity regulating sheet by blister forming; and cutting the portion with the humidity regulating sheet into a predetermined shape.

[0013] Function and Effect of the Invention

[0014] According to the humidity-regulating pad for sealing device and the manufacturing method thereof of the present invention, the humidity-regulating pad is arranged in the sealing device for regulating the humidity in the sealing device, including a body film, a humidity-regulating sheet, a first anti-reverse osmosis composite membrane, a paper pad and a second anti-reverse osmosis composite membrane arranged in sequence from top to bottom. Among them, the body film has air permeability and can allow water vapor to pass through, the humidity-regulating sheet can absorb and release moisture, the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane have air permeability and anti-reverse osmosis properties, and are used to prevent moisture from penetrating into the paper pad. The air permeability of the body film after stretching by the blister process is enhanced, so that the moisture absorption and release rate of the humidity-regulating pad is increased, and the ability of the humidity-regulating sheet to absorb and release moisture is guaranteed. The anti-reverse osmosis property of the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane prevents the paper pad from being damp and causing the body film covered on the surface to tilt. The humidity-regulating pad of this embodiment can be flexibly arranged at different positions inside the sealing device, and can be used to regulate the humidity of some products with high humidity value accuracy requirements, and the humidity-regulating pad is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a humidity-conditioning pad for a sealing device according to an embodiment of the present invention;

[0016] Figure 2 It is a graph showing the moisture absorption increment change of the PP film, PE film and SC film of the embodiment of the present invention before and after blister forming. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is described below with reference to the accompanying drawings and embodiments.

[0018] The anti-reverse osmosis composite membrane used in the embodiment of the present invention is a patented breathable anti-reverse osmosis packaging material structure (patent publication number: CN203427406U).

[0019] <Example>

[0020] This embodiment provides a humidity regulating pad for a sealing device, which is used to regulate the humidity inside the sealing device.

[0021] Figure 1 Schematic diagram of the structure of a humidity-conditioning pad for a sealing device according to an embodiment of the present invention.

[0022] like Figure 1 As shown, the humidity-conditioning pad 100 for sealing device of the present embodiment comprises a body-fitting film 1, a humidity-conditioning sheet 2, a first anti-reverse osmosis composite membrane 3, a paper pad 4 and a second anti-reverse osmosis composite membrane 5 which are arranged in sequence from top to bottom.

[0023] The first anti-reverse osmosis composite membrane 3 , the paper pad 4 and the second anti-reverse osmosis composite membrane 5 form a bottom plate 10 .

[0024] The shapes and areas of the first anti-reverse osmosis composite membrane 3, the paper pad 4 and the second anti-reverse osmosis composite membrane 5 are consistent, the area of ​​the humidity-conditioning sheet 2 is smaller than the paper pad 4, the area of ​​the body-fitting membrane 1 matches the humidity-conditioning sheet 2 and the paper pad 4, and covers the humidity-conditioning sheet 2 and part of the first anti-reverse osmosis composite membrane 3 at the same time.

[0025] The skin film 1 is breathable, can allow water vapor to pass through, and has a slow-release effect on liquid. The skin film 1 is processed by blister packaging to skin-wrap the humidity-conditioning sheet 2, so that the humidity-conditioning sheet 2 is fixed on the bottom plate 10.

[0026] In this embodiment, the first body-attaching film 1 is a PE (polyethylene) film. In other embodiments, an SC film (sodium ion PE film) or a PP film may also be selected, and body-attaching films 1 of different thicknesses and materials may also be selected according to the user's requirements for the rate of moisture absorption and release.

[0027] The humidity-conditioning sheet 2 is used to absorb or release moisture to adjust humidity, and is a composition with a certain amount of moisture. The area of ​​the humidity-conditioning sheet 2 is smaller than the area of ​​the paper pad 4 .

[0028] In this embodiment, the diameter of the humidity-conditioning sheet 2 is 30 mm. In other embodiments, the thickness of the humidity-conditioning sheet can be changed according to the different moisture absorption rates required for different volumes of the sealing device; the formula and diameter of the humidity-conditioning agent used to make the humidity-conditioning sheet can be changed according to the different humidity ranges required.

[0029] The first anti-reverse osmosis composite membrane 3 is a layered structure, including an anti-reverse osmosis layer and one or more air permeable layers, wherein the anti-reverse osmosis layer is a PE air permeable membrane or a PET air permeable membrane, and the air permeable layer is a non-woven fabric or paper. The first anti-reverse osmosis composite membrane 3 is air permeable and is used to prevent moisture in the humidity-conditioning sheet 2 from penetrating into the paper pad 4.

[0030] The paper pad 4 is also air-permeable. In this embodiment, the area of ​​the paper pad 4 is the same as the inner side of the lid of the sealing device, and is embedded in the lid. In other embodiments, the shape and size of the paper pad 4 can also be smaller than the inner side of the lid, and it is attached to the inner side of the lid with an adhesive.

[0031] The second anti-reverse osmosis composite membrane 5 is a layered structure, including an anti-reverse osmosis layer and one or more air permeable layers, wherein the anti-reverse osmosis layer is a PE air permeable membrane or a PET air permeable membrane, and the air permeable layer is a non-woven fabric or paper. The second anti-reverse osmosis composite membrane 5 and the first anti-reverse osmosis composite membrane 3 make the tension on both sides of the bottom plate the same, so that the bottom plate is flat and can be processed by blistering. The second anti-reverse osmosis composite membrane 5 and the adjacent surface of the paper pad 4 are printed with patterns or texts.

[0032] The present invention also provides a method for preparing the humidity-conditioning pad for the sealing device, comprising the following steps:

[0033] The first anti-reverse osmosis composite membrane 3 and the second anti-reverse osmosis composite membrane 5 are respectively attached to both sides of the paper pad 4 to form a bottom plate;

[0034] A plurality of humidity-conditioning sheets 2 are evenly arranged on the first anti-reverse osmosis composite membrane 3;

[0035] The PE film is heated to a softened state, and the humidity-conditioning sheet 2 is covered from the side of the humidity-conditioning sheet 2 away from the first anti-reverse osmosis composite film 3, and a vacuum is drawn from the side of the second anti-reverse osmosis composite film 5 away from the paper pad 4, that is, the body film 2 is adsorbed on the surface of the humidity-conditioning sheet 2 by blistering;

[0036] The humidity conditioning sheet is cut into a predetermined shape to obtain the humidity conditioning pad 100 .

[0037] Experiment 1:

[0038] In this embodiment, the humidity-conditioning sheet 100 is processed by the blister process, which increases the air permeability of the body-fitting film 1 and improves the moisture absorption and release capacity of the humidity-conditioning sheet 100 .

[0039] Experiment 1 of this embodiment provides comparative experimental data to compare the humidity control ability of the humidity control pad 100 of the present invention using blister and the humidity control article not using blister. Specifically, a prototype humidity control sheet 2 with a diameter of 30 mm and a humidity (RH) of 50% was taken and three packaging structures were used to compare the moisture absorption and release rates. The three packaging structures are A. bottom plate + PE body film stretch (i.e., the humidity control pad of the present invention), B. breathable paper bag (purchased), and C. PE film bag.

[0040] The experimental steps are as follows: pack three types of humidity-regulating sheets, each weighing 18 grams, into 1000mL sealed Lock&Lock boxes with wireless temperature and humidity monitors. First, let the initial humidity in the sealed boxes reach equilibrium (about RH50%), and then put 1 gram of fiber desiccant into each box to observe the humidity changes.

[0041] The result is as follows:

[0042] Table 1 Comparison of moisture absorption and release rates of three packaging structures

[0043]

[0044] As shown in Table 1, the humidity change rules and rates of the humidity control pad 100 of this embodiment and the humidity control sheet packaged in a breathable paper bag are similar after 7 days, with the humidity decreasing in the first 3 days and returning to the original 50% in the last 4 days; while the bag made of the PE film without blister processing can only slowly recover to 23.63% after the humidity decreases. The results show that there is almost no difference in the moisture absorption and desorption rates of the humidity control pad 100 of this embodiment and the humidity control sheet packaged in a breathable paper bag, while the humidity control sheet in the PE film bag without blister processing has poor air permeability and cannot balance the humidity in the box by desorption.

[0045] In addition, the desiccant and the three packaging structures were weighed separately to see the moisture absorption increase of the desiccant and the moisture release decrease of the humidity regulating sheet.

[0046] The result is as follows:

[0047] Table 2 Comparison of moisture release of humidity control sheets and moisture absorption of desiccant in three packaging structures

[0048] Weight difference Structure of the present invention Breathable paper bag PE film for body Humidity control sheet (weight loss, g) 0.605 0.587 0.087 Desiccant (weight gain, g) 0.674 0.656 0.275

[0049] As shown in Table 2, in the same closed space, the weight gain of the desiccant is greater than the weight loss of the humidity-conditioning sheet, indicating that the Lock & Lock box is not absolutely airtight, and the desiccant also absorbs moisture from the external environment; the weight loss and weight gain of the humidity-conditioning sheet and the desiccant in the packaging structure of this embodiment and the breathable paper bag are not much different, both about 0.6g; while the weight loss and weight gain of the humidity-conditioning sheet and the desiccant in the skin-PE film packaging are significantly smaller than the former two. The results prove that due to the large humidity difference between the inside and outside of the sealed box in the skin-PE film packaging, the moisture absorption of the desiccant is much greater than the moisture release of the humidity-conditioning sheet, so the bag made only of PE film cannot balance the humidity in the box by releasing moisture.

[0050] In summary, the experiment 1 of this embodiment proves that the moisture absorption and release capacity of the humidity-conditioning pad 100 of this embodiment is not much different from that of existing products, or even better than that of existing products. However, the air-permeable paper bag cannot be processed by the blister process and can only be made into a traditional bagged desiccant. The bag made only of the body-fitting PE film cannot balance the humidity in the box by releasing moisture.

[0051] Experiment 2:

[0052] The body-fitting film 1 of this embodiment can be made of materials with different air permeabilities, and a blister process is used to improve the moisture absorption and release capabilities of the humidity-conditioning sheet 100 .

[0053] Experiment 2 of this embodiment provides the moisture permeability of different materials before blister packaging and after blister packaging stretching. Commonly used body-fitting packaging films include: PVC (polyvinyl chloride), PET (polyester resin), PP (polypropylene), PE (polyethylene) and other plastic films. Among them, PVC contains chloride ions, which does not meet environmental protection requirements, while PET is relatively hard. When it is attached to a soft and wet humidity-regulating sheet, it will cause the humidity-regulating disc to deform. Therefore, Experiment 2 of this embodiment is specifically as follows: PP and PE are selected for comparative testing. PE films are divided into ordinary PE films and SC films (sodium ion PE films). Among them, this experiment selected three body-fitting films, namely, PP film with a thickness of 8 threads pre-coated with glue, ordinary PE film and SC film, for comparative testing.

[0054] The experimental steps are as follows: use a film with an unfolded size of 140*100mm to make a bag, put an equal amount of 9 grams of fiber desiccant into the bag, put it in a constant temperature and humidity box with a temperature of 25°C and a humidity of 90%, and weigh it every 24 hours until 15 days.

[0055] The result is as follows:

[0056] Table 3 Air permeability (moisture absorption rate) of different body-fitting films before and after blister stretching (unit: %)

[0057]

[0058]

[0059] Figure 2 3 is a graph showing the moisture absorption increment change of the PP film, PE film and SC film of this embodiment before and after blister forming.

[0060] As shown in Table 3 and Figure 2 As shown, the moisture absorption rates of PP film before and after stretching are 1.83% and 3.49%, both less than 5%; the moisture absorption rate of ordinary PE film is 4.26% before stretching and 10.38% after stretching; and the moisture absorption rates of SC film after blister stretching are 14.3% and 16.28%, respectively.

[0061] According to empirical values, if the moisture absorption rate is less than 5% within 15 days, it means that the moisture permeability does not meet the requirements. The results show that the moisture permeability of the PP film before and after blistering does not meet the requirements, while the moisture absorption rate of the PE film and the SC film after blistering is much greater than 5%, which can meet the requirements. At the same time, the moisture permeability of the SC film after blistering is better. Therefore, among these three films, the PE film and the SC film after blistering and stretching can be selected as the body-fitting film 1, and the SC film is preferred.

[0062] Experiment 3:

[0063] The first anti-reverse osmosis composite membrane 3 and the second anti-reverse osmosis composite membrane 5 of this embodiment are air permeable.

[0064] Experiment 3 of this embodiment provides a comparison of a humidity-conditioning pad with or without an anti-reverse osmosis composite membrane. Specifically, a humidity-conditioning pad prepared by the following steps is used: a plurality of humidity-conditioning sheets 2 are evenly arranged on a paper pad 4, a body-attaching film 1 is adsorbed on the surface of the humidity-conditioning sheets 2 and the paper pad 4 by blistering, and a portion of the humidity-conditioning sheets 2 is cut into a predetermined shape to obtain a humidity-conditioning pad 100; and a humidity-conditioning pad 100 in this embodiment is compared with the humidity-conditioning pad 100, that is, a comparison experiment of a humidity-conditioning pad with or without an anti-reverse osmosis composite membrane.

[0065] The experimental steps are as follows: place the two humidity-conditioning pads in a sealed device with a certain humidity and the same humidity, and take them out for observation after a period of time.

[0066] The results are as follows: the humidity-conditioning pad 100 of this embodiment has no obvious change before and after being placed in the sealed device, while the humidity-conditioning pad bottom plate without the anti-reverse osmosis composite membrane has the body-contacting membrane on the surface warped due to moisture.

[0067] The results show that since the humidity-conditioning sheet 2 of the present invention is a composition with a certain amount of moisture, when the anti-reverse osmosis composite membrane is not used, the bottom plate will be affected by moisture, causing the body-fitting membrane on the surface to warp or even fall off. However, if an airtight membrane is used, the body-fitting blister (vacuuming) process cannot be completed, and the moisture absorption and release speed of the product will be affected.

[0068] In addition, the experiment 3 of this embodiment also provides an experiment using only one layer of anti-reverse osmosis composite film. The experimental steps are to coat the anti-reverse osmosis composite film on one side of the paper pad 4. The experimental results show that when only one side of the paper pad 4 is coated with the film, the bottom plate will bend and become uneven due to the different tensions on the two sides, and the next blister process cannot be performed.

[0069] In summary, both sides of the paper pad 4 in the embodiment of the present invention need to be coated with an anti-reverse osmosis coating film.

[0070] Example Function and Effect

[0071] According to the humidity-regulating pad for the sealing device provided in the present embodiment, it is arranged in the sealing device and used to regulate the humidity in the sealing device, including a body-fitting film, a humidity-regulating sheet, a first anti-reverse osmosis composite film, a paper pad and a second anti-reverse osmosis composite film arranged in sequence from top to bottom. Among them, the body-fitting film is breathable and can allow water vapor to pass through, the humidity-regulating sheet can absorb and release moisture, and the first anti-reverse osmosis composite film and the second anti-reverse osmosis composite film are breathable and anti-reverse osmosis, and are used to prevent moisture from penetrating into the paper pad. The breathability of the body-fitting film increases the moisture absorption rate of the humidity-regulating pad, while ensuring the ability of the humidity-regulating sheet to absorb and release moisture. The anti-reverse osmosis property of the first anti-reverse osmosis composite film and the second anti-reverse osmosis composite film prevents the paper pad from being damp and causing the body-fitting film on the surface to be lifted. The humidity-regulating pad of this embodiment can be flexibly arranged at different positions inside the sealing device, and can be used to adjust the humidity of some products with high humidity value accuracy requirements, and the humidity-regulating pad is not easily damaged or failed.

[0072] This embodiment also provides a method for manufacturing a humidity-regulating pad for a sealing device. Since each layer of the humidity-regulating pad in this embodiment is air-permeable, it can be processed by blistering without punching. The blistering can laminate the body-fitting film onto the humidity-regulating sheet and fix the internal materials. The blistering method heats and stretches the body-fitting film, thereby increasing the pore size of the body-fitting film, improving the air permeability of the body-fitting film, and increasing the moisture absorption and release rate of the humidity-regulating pad. At the same time, the blistering process can also prevent the liquid in the humidity-regulating sheet from seeping out during the processing.

[0073] Furthermore, the body film of the humidity regulating pad for the sealing device of the present embodiment adopts PE body film or SC film. Through comparative experiments, it is found that the moisture absorption rate of the desiccant using these two body films exceeds the empirical value, and the moisture absorption rate after stretching is significantly improved. In addition, the thickness and material of the body film can be adjusted according to the user's different requirements for moisture absorption and release rate, so that the humidity regulating pad of the present invention can be more widely used.

[0074] Furthermore, the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane of the humidity-conditioning pad for the sealing device of the present embodiment are layered structures, including anti-reverse osmosis layers and one or more air-permeable layers arranged in sequence, so that the first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane have air permeability and can prevent water from passing through. In addition, the adjacent surface of the second anti-reverse osmosis composite membrane and the paper pad can be printed with patterns or texts, so that users can print labels, trademarks, etc. according to needs.

[0075] Furthermore, the shape of the paper pad of the humidity-conditioning pad for the sealing device of this embodiment can match the cover of the sealing device, and can be embedded or adhered to the inner wall of the cover using an adhesive, so that the humidity-conditioning pad of this embodiment can be used more flexibly.

[0076] The above embodiments are only used to illustrate specific implementation modes of the present invention, and the present invention is not limited to the description scope of the above embodiments.

[0077] In this embodiment, the humidity conditioning pad 100 is arranged on the inner side of the cover of the sealing device and matches the shape of the inner side of the cover. In other embodiments, it can also be arranged on the inner wall or other position of the device, and the corresponding shape and area of ​​the humidity conditioning pad 100 can also be changed.

Claims

1. A humidity-conditioning pad for a sealing device, arranged in the sealing device, for regulating the humidity in the sealing device, characterized in that: include: The body-fitting membrane, humidity-conditioning sheet, first anti-reverse osmosis composite membrane, paper pad and second anti-reverse osmosis composite membrane are arranged in sequence from top to bottom. The body-fitting film is breathable and can allow water vapor to pass through. The body-fitting film is a PE film or an SC film, which covers the humidity-conditioning sheet and a part of the first anti-reverse osmosis composite film by blistering. The humidity-conditioning sheet is used to absorb and release moisture to adjust the humidity, and its area is smaller than that of the paper pad. The first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane are air-permeable and used to prevent moisture from penetrating into the paper pad. The first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane are multi-layer structures, including anti-reverse osmosis layers and one or more breathable layers arranged in sequence, the anti-reverse osmosis layer is a PE breathable membrane or a PET breathable membrane, and the breathable layer is a non-woven fabric or paper. The sealing device comprises a cover, the area of ​​the paper pad is smaller than the area of ​​the inner side surface of the cover, and the second anti-reverse osmosis composite membrane is glued to the inner side surface of the cover.

2. The humidity-conditioning pad for a sealing device according to claim 1, characterized in that: in, Patterns or words are printed on the surface of the second anti-reverse osmosis composite membrane adjacent to the paper pad.

3. The humidity-conditioning pad for a sealing device according to claim 1, characterized in that: in, The shape and area of ​​the paper pad match the inner side surface of the cover, and the paper pad is embedded in the cover.

4. A method for manufacturing a humidity-conditioning pad for a sealing device according to any one of claims 1 to 3, characterized in that: include: The first anti-reverse osmosis composite membrane and the second anti-reverse osmosis composite membrane are respectively attached to both sides of the paper pad; Evenly arranging a plurality of the humidity-conditioning sheets on the first anti-reverse osmosis composite membrane; The body-attached film is heated and softened to cover all of the humidity-conditioning sheet from the side of the humidity-conditioning sheet away from the first anti-reverse osmosis composite film, and a vacuum is drawn from the side of the second anti-reverse osmosis composite film away from the paper pad, so that the body-attached film is adsorbed on the surface of the humidity-conditioning sheet by blistering; The portion having the humidity-conditioning sheet is cut into a predetermined shape.

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