Filter bag for detecting absorption amount of super absorbent resin

Abstract

The utility model provides a filter bag for detecting the absorption capacity of super absorbent resin, which relates to the technical field of measuring tools and comprises a filter bag, and the filter bag comprises a wear-resistant layer, a filter layer and a hydrophilic layer which are sequentially arranged from outside to inside. The filter bag disclosed by the utility model adopts a three-layer structure of the wear-resistant layer, the filter layer and the hydrophilic layer which are sequentially arranged from outside to inside, so that the overall physical strength of the filter bag is enhanced, the accuracy of a detection result is ensured, the filter bag can be repeatedly used, and the environmental protection property is good. Specifically, the wear-resistant layer serves as the outermost layer and can effectively resist physical friction and abrasion in the operation process, damage in the sampling or detection process is avoided, and it is ensured that the detection process is smoothly carried out. The filter layer is located in the middle, liquid can smoothly pass through the filter layer, and large-particle impurities can be effectively blocked. The hydrophilic layer serves as the innermost layer and can rapidly absorb and retain liquid, so that the sample can be in full contact with the liquid, and the absorption amount of the sample is accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring tools, in particular to a filter bag for detecting the absorption capacity of superabsorbent resin. Background Technique

[0002] Superabsorbent resin (hereinafter referred to as SAP) is a functional polymer material containing strong hydrophilic groups such as carboxyl and hydroxyl groups, and having a certain degree of crosslinking and network structure. This material is widely used in sanitary products, medical treatment, agriculture and forestry, industry, civil construction, waste liquid solidification treatment, food preservation, drying and other fields. Among them, the applications in sanitary products include baby diapers, adult incontinence products, women's sanitary products, medical surgical pads and pet sanitary products. In particular, the sanitary product field pays particular attention to the performance index of "absorption capacity" of superabsorbent resin products.

[0003] For the determination of the absorption capacity, the main domestic basis is "GB / T22875-2018 Superabsorbent Resin for Diapers and Sanitary Napkins" for determination.

[0004] At present, most of the used paper tea bags are used as detection tools. Although they meet certain technical requirements, there are the following technical problems:

[0005] 1. The paper tea bag is made of paper, with low physical strength, and is prone to breakage due to friction and extrusion during operation, resulting in the leakage of SAP samples and affecting the accuracy of test results;

[0006] 2. As a disposable consumable, the paper tea bag needs to be frequently replaced in a large number of tests, resulting in waste of resources and environmental protection problems.

[0007] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0008] The purpose of the present utility model is to provide a filter bag for detecting the absorption capacity of superabsorbent resin, so as to solve the technical problems existing in the prior art that the used paper tea bag as a detection tool has insufficient physical strength, is prone to breakage during operation, has poor use stability, and due to its disposable use characteristics, results in waste of resources and environmental protection problems. The many technical effects that can be produced by the preferred technical solutions provided by the present utility model are described in detail below.

[0009] To achieve the above purpose, the present utility model provides the following technical solutions:

[0010] A filter bag for detecting the absorption capacity of superabsorbent resin provided by the present utility model includes a filter bag, and the filter bag includes a wear-resistant layer, a filter layer and a hydrophilic layer arranged in sequence from outside to inside.

[0011] Preferably, the wear-resistant layer comprises a polyamide layer.

[0012] Preferably, the number of layers of the filter layer is multiple, and there is a mesh framework between two adjacent filter layers.

[0013] Preferably, the filter layer comprises a filter non-woven fabric layer and / or a filter nylon mesh layer.

[0014] Preferably, the hydrophilic layer comprises a hydrophilic nylon layer or a hydrophilic non-woven fabric layer.

[0015] Preferably, the two side edges of the filter bag are folded and tightly combined to form two parallel sealed edges, and the top of the filter bag is in an unsealed state to form an opening for loading and unloading samples.

[0016] Preferably, a drawstring is further included. After the opening is turned outwards, it is connected to the main body part of the filter bag to form a receiving cavity for receiving the drawstring. By pulling the drawstring located outside the receiving cavity, the opening can be tightened or closed.

[0017] Preferably, a hanging member is provided on the drawstring located outside the receiving cavity.

[0018] The preferred technical solution of the present utility model can at least further produce the following technical effects:

[0019] The present utility model effectively avoids the technical problems existing in the prior art, such as using a paper tea bag as a detection tool, which has insufficient physical strength, is prone to breakage during the operation process, has poor use stability, and due to its disposable use characteristics, causes resource waste and environmental protection problems. The present utility model provides a filter bag for detecting the absorption amount of a superabsorbent resin, which comprises a filter bag. The filter bag comprises a wear-resistant layer, a filter layer and a hydrophilic layer which are sequentially arranged from outside to inside. The filter bag of the present utility model adopts a three-layer structure of a wear-resistant layer, a filter layer and a hydrophilic layer which are sequentially arranged from outside to inside, enhancing the overall physical strength of the filter bag, not only ensuring the accuracy of the detection result, but also realizing the reusable of the filter bag, and having good environmental protection performance. The wear-resistant layer, as the outermost layer, can effectively resist physical friction and wear during the operation process, avoid breakage during sampling or detection, and ensure the smooth progress of the detection process. The filter layer is located in the middle, which can allow the liquid to pass through smoothly and effectively block large-particle impurities. The hydrophilic layer, as the innermost layer, can quickly absorb and retain the liquid, enabling the sample to fully contact with the liquid, so as to accurately measure the absorption amount of the sample. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural view of a filter bag for detecting the absorption amount of a superabsorbent resin provided by the present invention;

[0022] Figure 2 is a sectional view of a filter bag for detecting the absorption amount of a superabsorbent resin provided by the present invention.

[0023] In the figure:

[0024] 1. Filter bag; 101. Sealing edge; 102. Accommodating cavity; 1021. Channel; 2. Nylon layer; 3. Filter non-woven fabric layer; 4. Filter nylon mesh layer; 5. Hydrophilic nylon layer; 6. Mesh skeleton; 7. Drawstring; 8. Hanging member; 9. Sewing thread. Detailed implementation manners

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0026] As Figure 1 - Figure 2 shown, the present invention provides a filter bag 1 for detecting the absorption amount of a superabsorbent resin, including a filter bag 1, and the filter bag 1 includes a wear-resistant layer, a filter layer, and a hydrophilic layer sequentially arranged from outside to inside.

[0027] The filter bag 1 of the present invention adopts a three-layer structure of a wear-resistant layer, a filter layer, and a hydrophilic layer sequentially arranged from outside to inside, and the mass per unit area is (16.5 ± 1.5) g / m 2 , enhancing the overall physical strength of the filter bag 1, not only ensuring the accuracy of the detection result, but also realizing the reusable of the filter bag 1, with good environmental protection. The wear-resistant layer, as the outermost layer, can effectively resist physical friction and wear during the operation, avoiding breakage during sampling or detection, and ensuring the smooth progress of the detection process. The filter layer is located in the middle, allowing liquids to pass through smoothly while effectively blocking large-particle impurities. The hydrophilic layer, as the innermost layer, can quickly absorb and retain liquids, enabling the sample to fully contact the liquid, so as to accurately measure the absorption amount of the sample.

[0028] Further, the length of the filter bag 1 is 200 mm, the width is 100 mm, and the air permeability is (230 ± 50) L / (min·100 cm 2 )(pressure difference 124 Pa).

[0029] As an alternative embodiment, the wear-resistant layer includes a nylon layer 2.

[0030] Further, the thickness of the nylon layer 2 is 0.1 mm to 0.5 mm, the content of thermoplastic fibers is (0.4 ± 0.8) g / m 2 , the transverse tensile strength of the web is (70 ± 12) N / m. Such a setting enables the nylon layer 2 to have sufficient physical strength to resist external friction and wear, while also taking into account the overall flexibility and air permeability of the filter bag 1, making the filter bag 1 durable and practical during use.

[0031] The nylon layer 2 is made of nylon fibers, which have good wear resistance, tensile strength and durability, and can improve the durability and service life of the filter bag 1.

[0032] As an alternative embodiment, the number of layers of the filter layer is multiple, and there is a mesh skeleton 6 between two adjacent filter layers.

[0033] As an alternative embodiment, the filter layer includes a filter non-woven fabric layer 3 and / or a filter nylon mesh layer 4.

[0034] Further, the number of layers of the filter layer is two, including a filter non-woven fabric layer 3 and a filter nylon mesh layer 4 arranged in sequence from outside to inside, and a mesh skeleton 6 is arranged between the filter non-woven fabric layer 3 and the filter nylon mesh layer 4.

[0035] The mesh skeleton 6 provides additional support for the filter non-woven fabric layer 3 and the filter nylon mesh layer 4, enhances the overall stability of the filter layer, helps to maintain the space between the filter non-woven fabric layer 3 and the filter nylon mesh layer 4, and optimizes the filtering effect.

[0036] The thickness of the filter non-woven fabric layer 3 and the filter nylon mesh layer 4 is 0.05 mm to 0.2 mm. Such a setting enables the filter layer to have a certain physical strength, while also having good air permeability and filtering efficiency. And the pore sizes of the filter non-woven fabric layer 3 and the filter nylon mesh layer 4 are designed according to the particle sizes of the SAP samples to ensure that the samples will not leak, while allowing liquids to pass through freely.

[0037] As an alternative embodiment, the hydrophilic layer includes a hydrophilic nylon layer 5 or a hydrophilic non-woven fabric layer.

[0038] Further, the hydrophilic layer is preferably a hydrophilic nylon layer 5, which not only has good hydrophilicity but also has a certain physical strength and durability. The thickness of the hydrophilic nylon layer 5 is 0.05 mm to 0.2 mm to ensure that the hydrophilic nylon layer 5 has good liquid absorption capacity and air permeability.

[0039] It should be noted that the nylon layer 2, the filter non-woven fabric layer 3, the mesh skeleton 6, the filter nylon mesh layer 4 and the hydrophilic nylon layer 5 are formed by needle punching and compounding process in the prior art, and the details of this compounding technology will not be elaborated here.

[0040] As an alternative embodiment, the two side edges of the filter bag 1 are folded in half and tightly combined to form two parallel sealed edges 101, and the top of the filter bag 1 is in an unsealed state to form an opening for loading and unloading samples.

[0041] Further, the two side edges of the filter bag 1 are respectively folded in half and overlapped, and the overlapped edges are tightly stitched by a plurality of sewing lines 9 extending along the length direction of the device to form two parallel sealed edges 101, which enhances the structural strength of the filter bag 1, makes it more tough and durable, and also improves the sealing performance of the filter bag 1, effectively preventing the sample from leaking from the side of the filter bag 1 and ensuring the accuracy and reliability of the test results.

[0042] The use of a plurality of sewing lines 9 further enhances the firmness and stability of the edge of the filter bag 1. The sewing lines 9 are evenly distributed on the overlapped edges and form a strong sealed edge through tight stitching, so that the filter bag 1 can maintain stable performance and good sealing effect during the processes of loading and unloading samples, conducting tests and subsequent repeated use.

[0043] As an alternative embodiment, it further includes a drawstring 7. After the opening is turned outwards and connected to the main body part of the filter bag 1 to form a receiving cavity 102 for receiving the drawstring 7, the drawstring 7 located outside the receiving cavity 102 is pulled to tighten or close the opening.

[0044] Further, after the opening is turned outwards, it is tightly stitched with the main body part of the filter bag 1 by the sewing line 9 to form a receiving cavity 102 for receiving the drawstring 7. A channel 1021 for the drawstring 7 to extend out is provided on the receiving cavity 102 so that the drawstring 7 can smoothly extend out of the receiving cavity 102 and be easily pulled.

[0045] The drawstring 7 is a cotton drawstring 7, which has the advantages of easy cleaning and reusable.

[0046] As an alternative embodiment, a hanging member 8 is provided on the drawstring 7 located outside the receiving cavity 102.

[0047] Furthermore, the suspension member 8 is of an annular structure and can be easily adapted to various hooks, brackets or other suspension devices. The filter bag 1 can be conveniently suspended at a suitable position on the experimental bench by using the annular suspension member 8 for processing, such as static treatment after soaking. The suspension position and usage method can be flexibly selected according to specific experimental requirements, further improving the experimental efficiency and convenience.

[0048] In order to compare the performance differences between the filter bag 1 provided by the present utility model and the commonly used paper tea bag when measuring the absorption amount of superabsorbent resin, especially focusing on its parallelism, data stability and relative deviation, the following experiments were carried out:

[0049] S1: Accurately weigh two different specimens, each weighing 1.000 g, accurate to 0.001 g, and record the mass respectively;

[0050] S2: Pour all of each specimen into the bottom of the corresponding filter bag 1, especially clean the specimen attached to the inner wall of the filter bag 1 to the bottom of the filter bag 1 to ensure that all specimens are at the bottom of the bag;

[0051] S3: Put the filter bag 1 containing the specimen into a beaker filled with a sufficient amount of test solution, ensure that the solution completely covers the filter bag 1, and soak for 30 minutes. After the soaking is over, use a tool to hook the suspension member 8 of the filter bag 1, lift out the filter bag 1, and suspend it for static settlement, and let it drip naturally for 10 minutes in a static state;

[0052] Note: The test solution selected for this test is physiological saline;

[0053] S4: Immediately weigh the filter bag 1 containing the specimen after the dripping is over and record its mass;

[0054] Note: Each of the two specimens needs to be repeated four times, and each experiment includes three parallel determinations to obtain more comprehensive data;

[0055] S5: For direct comparison, using exactly the same experimental steps and conditions as S1 to S4, replace the nylon filter bag 1 with a commonly used paper tea bag and conduct parallel experiments on the same batch of samples;

[0056] S6: Summarize all experimental data, establish corresponding Table 1 and Table 2 for the two different specimens respectively; calculate the average value, standard deviation and relative standard deviation of the experimental results of the filter bag 1 and the paper tea bag.

[0057] Through comparative analysis, evaluate the performance of the filter bag 1 and the paper tea bag in terms of parallelism, data stability and relative deviation.

[0058] Based on the statistical analysis of the experimental data in Table 1 and Table 2, it can be clearly concluded that when measuring the absorption capacity of superabsorbent resin, using Filter Bag 1 has better parallelism, lower relative deviation, and more stable data results compared to the commonly used paper tea bags. This indicates that the Filter Bag 1 provided by the present utility model has significant advantages in improving the detection accuracy and reliability.

[0059] Table 1:

[0060]

[0061] Table 2:

[0062]

[0063] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be referred to the same or similar content in other embodiments.

[0064] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0065] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0066] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "one example" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. A filter bag for detecting the absorption amount of a super absorbent resin, characterized in that: It includes a filter bag, which includes a wear-resistant layer, a filter layer and a hydrophilic layer arranged in sequence from the outside to the inside; the two side edges of the filter bag are folded in half and tightly combined to form two parallel sealing edges, and the top of the filter bag is in an unclosed state, forming an opening for loading and taking samples; it also includes a drawstring, which is folded outward and connected to the main body of the filter bag to form a accommodating cavity for accommodating the drawstring, and the opening is tightened or closed by pulling the drawstring located outside the accommodating cavity.

2. A filter bag for detecting absorption of a super absorbent resin according to claim 1, characterized in that: The wear-resistant layer includes a nylon layer.

3. A filter bag for detecting absorption of a super absorbent resin according to claim 1, characterized in that: The filter layer has multiple layers, and a mesh skeleton is provided between two adjacent filter layers.

4. A filter bag for detecting absorption of a super absorbent resin according to claim 3, characterized in that: The filter layer includes a filter nonwoven fabric layer and / or a filter nylon mesh layer.

5. A filter bag for detecting absorption of a super absorbent resin according to claim 1, characterized in that: The hydrophilic layer includes a hydrophilic nylon layer or a hydrophilic non-woven fabric layer.

6. A filter bag for detecting absorption of a super absorbent resin according to claim 1, characterized in that: A hanging piece is arranged on the drawstring located outside the accommodating cavity.

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