CN217078608U - High water absorption resin composite filling bag - Google Patents

Abstract

The utility model discloses a high water absorption resin composite filling bag, comprises a bag bod 1, the internal filler 2 that is equipped with of bag or being equipped with the inlet port that can open and shut that is equipped with of bag 1, bag 1 includes extexine 3, endosexine 4 to and intermediate level 5, extexine 3, endosexine 4 are together fixed with intermediate level 5, and intermediate level 5 comprises skin 6, inlayer 7 and be located three-dimensional network structure layer 8 between the two, and three-dimensional network structure layer 8 is including the irregular network accommodation space 9 that communicates mutually, and 10 holding of high water absorption resin powder are in accommodation space 9. The problem of use sodium polyacrylate resin powder as the sand bag filler among the prior art, bag body intensity, anti degree of tearing and support degree are not enough is solved to the bag body blocks water the effect better, can prevent that the filler from running off.

Description

High water absorption resin composite filling bag

Technical Field

The utility model belongs to the technical field of speedily carry out rescue work and fire-fighting equipment technique and specifically relates to a super absorbent resin composite filling bag is filled with light self-expanding formula super absorbent resin field, especially to disaster prevention and reduction.

Background

In flood prevention or fire fighting, sand bags are usually used for water-blocking and water-isolating operations. The application is mainly river plugging and strengthening, city flood control, underground building water intake prevention, water drainage and water retaining in engineering and the like. However, the sand bag in the prior art is simple, a plastic woven bag or a linen woven bag is generally selected, the bag does not retain water, water retaining objects such as sand or soil need to be filled in the sand bag when the sand bag is used, and the sand bag cannot be used if earth and stone conditions are not suitable for digging and filling sand, so that the flood-fighting timeliness is affected. If sand is filled in advance, the weight and volume of the sandbag become very large, which is very disadvantageous for transportation and delivery.

Super Absorbent Resin (SAR) is a novel functional polymer material containing strong hydrophilic groups such as carboxyl groups and amide groups and having a water swelling type and three-dimensional network structure with a certain degree of crosslinking, and is represented by sodium polyacrylate Resin. It is insoluble in water and organic solvent, and has unique performance of strong water absorption and water retention. Compared with the traditional water absorption materials such as sponge, cotton, cellulose and silica gel, the super absorbent resin has large water absorption capacity, can rapidly absorb liquid water which is dozens of times or even thousands of times of self weight, has strong water retention property, is not easy to lose water even under the heating and pressurizing condition, and simultaneously has some characteristics of high polymer materials. Due to these characteristics, the research and development of the super absorbent resin is very rapid, and the super absorbent resin has been widely applied to various fields such as agriculture, forestry, gardening, medical health, food industry, petrochemical industry, building materials and the like.

Superabsorbent polymers have been rapidly developed and diversified, and are classified into various methods mainly according to the source of raw materials, hydrophilization method, type of hydrophilic group, crosslinking method, and product form, and the most commonly used classification methods include starch-based superabsorbent polymers, cellulose-based superabsorbent polymers, synthetic superabsorbent polymers, protein-based superabsorbent polymers, blend and composite superabsorbent polymers, and the like.

Superabsorbent resins are capable of absorbing hundreds or even thousands of times their own mass of water because they have two conditions: one is that it has hydrophilic groups such as carboxyl group, hydroxyl group, amide group, sulfonic acid group, etc., making water absorption possible. And secondly, the water-absorbing material has a three-dimensional space network structure and is insoluble in water, so that the water absorption becomes a reality. The super absorbent resin is a three-dimensional network polymer which has hydrophilic groups and is slightly crosslinked, can absorb a large amount of water, swell and keep the water not to flow out, and has the advantages of high water absorption rate, strong water retention performance and the like.

In the prior art, super absorbent resin is also adopted as the filler of the water-blocking bag.

For example, the prior art discloses a flood prevention sand bag, which comprises a sand bag body, wherein a sewn non-woven fabric bag 2 is sleeved in the sand bag body, sand is filled in the non-woven fabric bag, super absorbent resin is filled in the non-woven fabric bag, inward longitudinal creases are arranged on the surface of the sand bag body, wheels are arranged at two longitudinal end parts of the sand bag body, and the wheels are folded inwards along the creases and flatly arranged on the surface of the sand bag body. The sandbag does not change the structure or the material of the sandbag, only the filler is replaced by the super absorbent resin from the traditional sandy soil, the outer bag is not pertinently improved aiming at the change of the filler, the forming performance of the sandbag body is poor, and the stacking and water blocking cannot be well realized.

The second prior art discloses a water-swelling geotechnical mesh pad, including check net layer, woven fabric bag layer, the non-woven fabric bag layer and the super absorbent resin of permeating water, its characterized in that, check net layer is outermost, woven fabric bag layer is the intermediate level, the non-woven fabric bag layer of permeating water is the inlayer, check net layer, woven fabric bag layer and the non-woven fabric bag layer of permeating water are closely made the pressfitting and are as an organic whole, fill the super absorbent resin in the non-woven fabric bag layer of permeating water. The geotextile bag only replaces the filler with the super absorbent resin from the traditional sandy soil, the anti-skid performance of the outer bag is properly enhanced through material conversion, and the forming performance and the strength of the bag body are not ideal.

The third prior art discloses an impact resistant blocking fluid device, which is characterized by comprising: the protective layer is provided with two layers, and the two protective layers are connected to form a bag-shaped structure; an inner liner layer forming the inner surface of the protective layer to form a bag-shaped liner; the inner layer limiting line divides the space between the two inner lining layers into accommodating units arranged in a row matrix and a column matrix; and the water absorption material layer is filled in the accommodating unit. After the filler is replaced by the super absorbent resin from the traditional sandy soil, the inner liner is arranged to prevent the resin powder from leaking, but the structure of the outer bag is not improved, and the overall structural strength and the forming performance of the sand bag are not ideal.

In view of the above, there is a need in the market for a composite filled bag that can achieve rapid mixing of superabsorbent resin powder and water, and can provide good structural strength and tensile strength to the bag, and can stack the filled bag after absorbing water in a stable shape suitable for emergency.

Disclosure of Invention

The utility model aims to solve the technical problem that a high water absorption resin composite filling bag is provided can realize the flash mixed of high water absorption resin powder and water, provides good structural strength and tensile strength for the sack to can keep the filling bag after the self-expanding at the assigned position steadily.

The technical scheme of the utility model is, a high water absorption resin composite filling bag, including the bag body 1, be equipped with filler 2 in the bag body 1 or be equipped with the inlet port that can open and shut, the bag body 1 includes extexine 3 and intermediate level 5, extexine 3 is together fixed with intermediate level 5, its characterized in that, intermediate level 5 comprises skin 6, inlayer 7 and be located three-dimensional network structure layer 8 between the two, three-dimensional network structure layer 8 is including the irregular network accommodation space 9 that communicates mutually, high water absorption resin powder 10 holding in accommodation space 9.

Furthermore, the control size of the particles of the super absorbent resin powder 10, which accounts for more than 90% of the total weight of the super absorbent resin powder 10, is between 30 and 80 mesh, and the pore size of the three-dimensional network structure layer 8 is substantially consistent with the control size of the particles of the super absorbent resin powder 10.

Further, the strength of the three-dimensional mesh-structure layer 8 of the middle layer 5 is configured to ensure that the three-dimensional mesh-structure layer 8 has a thickness of at least 3mm after being bonded with the outer layer 6 and the inner layer 7.

Further, the outer layer 6, the inner layer 7 and the three-dimensional mesh-shaped structure layer 8 are connected together through ultrasonic welding spots 11.

Further, the ultrasonic welds 11 divide the intermediate layer 5 into a number of relatively spaced individual portions 12.

Further, the outer layer 6 and the inner layer 7 have channels 13, and the channels 13 are formed by the ultrasonic welding spots 11.

Further, the weld bonding strength of the ultrasonic weld 11 is set so that the ultrasonic weld 11 is spread after the super absorbent resin powder 10 absorbs water.

Further, the gap between the outer surface layer 3 and the middle layer 5 is filled with the super absorbent resin powder 10, and the outer surface layer 3 and the middle layer 5 are connected and fixed together by one or more of sewing, bonding or heat sealing.

Further, the bag body 1 further comprises an inner surface layer 4, the middle layer 5 is located between the inner surface layer 4 and the outer surface layer 3, the inner surface layer 4 and the middle layer 5 are fixedly connected together in one or more of sewing, bonding or heat sealing modes.

Further, the super absorbent resin powder 10 is a polyacrylic acid sodium salt copolymer. Furthermore, the outer surface layer 3 is made of one of hydrophilic non-woven fabrics, canvas and nylon fabrics with tensile strength, and the inner surface layer 4 is made of hydrophilic non-woven fabrics.

Further, the outer layer 6 and the inner layer 7 are made of hydrophilic non-woven fabric materials with pore sizes larger than 100 meshes.

Further, the filling bag is in a square or rectangular parallelepiped shape after being filled with the filler 2 by absorbing the expansion.

Further, the filler 2 is super absorbent resin powder and/or sand.

Compared with the prior art, the utility model discloses an advantage embodies:

1. the water-blocking effect is good. In the super absorbent resin, hydroenergy gets into three-dimensional network in a large number in very short time, forms an elasticity gel after the super absorbent resin absorbs water to closely link together between this kind of gel particle, there is not the space that can supply the air to get into between, can block the flow of water under the aquogel state, the utility model discloses a composite bag body, bag body itself just have the effect of blocking water, and the efficiency of blocking water of filler has surpassed the speedily carrying out rescue work and the engineering effect of traditional sand bag completely. In addition, the filling resin has extremely strong water absorption capacity and can continuously absorb water, even if the water is not completely saturated due to unsatisfactory water absorption conditions at first, the filling resin can continuously absorb water from a river or rainwater after being piled into a water blocking wall, and the final complete water blocking and shape stabilization are completed.

2. Is convenient to use. In flood fighting, if a large amount of sand and stones cannot be obtained in a short time on site, the traditional sandbag cannot play a role. And the utility model discloses a fill the bag, fill the super absorbent resin powder into the bag during product manufacturing, only need during the use water soak, water or spray water can accomplish from the inflation, and on-spot from the inflation efficiency of fighting a flood and speedily carrying out rescue work is very high, can produce the water-blocking bag of a large amount of cuboids or cube shape in the short time.

3. The strength of the bag body is improved. The utility model discloses a owing to adopted innovation structure and intermediate layer, the utility model discloses can provide good structural strength and tensile strength for the whole bag body, use behind the sandwich structure of this kind of innovation, the bag body is after soaking, and tensile strength can not reduce, and resistant tearing block water, very are applicable to the abominable site environment of the operation of speedily carrying out rescue work. In addition, the structure of the intermediate layer is further improved to be provided with mutually communicated accommodating channels, and the super absorbent resin powder is put into the mutually communicated space net structure as much as possible, so that the powder cannot float on the surface of the intermediate layer. On one hand, the powder particles can be fixed by using a woven net formed by fibers in a non-water-absorbing state and cannot move, so that the powder distribution is not uniform; on the other hand, under the water absorption state, the mutually communicated spaces are utilized to ensure that the gel with expanded volume formed after water absorption can move relatively and be bonded mutually more tightly to form a sealed and airtight protective layer, thereby further enhancing the strength and the water resistance of the bag body.

4. After absorbing water, the product is stiff and shaped. Utilize the self-expanding phenomenon that takes place after the intermediate level absorbs water, can be so that the whole of the bag body supports the intensity and increases, the sack props open the back and has the type, be difficult to warp and sink in piling up the use, the alignment nature at bag body edge is fine, makes things convenient for geotechnological operation. The bag body is in the in-process that struts, has guaranteed opening completely of inside filling space, can not influence inside filler fully to absorb moisture. In addition, the filling expands sufficiently to facilitate the closure of the fine water flow passages and to increase the overall weight and stacking capacity of the filled bag.

5. The storage is convenient. The super absorbent resin is high polymer powder, is safe in storage, transportation and the like, has storage (airtight anti-water absorption) stability of more than two years, and is non-toxic; due to the effect of the compact non-woven fabric layer, the situation of powder leakage and powder leakage of filler powder in the transportation and storage processes can be avoided. Only pollution-free water is absorbed in the using process, and the water is non-toxic and pollution-free to people and environment after being used, and is green and environment-friendly.

6. Has wide application. The utility model discloses a fill bag also has fine application effect in the fire prevention fire control field. Under the condition of high temperature, the super absorbent resin fixed with a large amount of free water has quite large heat capacity, can consume a large amount of heat during dehydration, forms effective isolation to a heat source, and is very favorable for protecting the safety of personnel in a fire scene with large fire if a wall-shaped fire isolating belt is built. The resin powder content in the whole water-absorbing gel is generally 0.05-5% of the weight of water, generally about 1%, a large amount of fire-extinguishing gel can be formed only by little super-absorbent resin powder, the fire-extinguishing and fire-preventing effects are excellent, moisture can be continuously absorbed, the situation that gaps among filling bags are not completely sealed is avoided, and moisture can be sufficiently absorbed in a short time to form a strong heat source isolation barrier.

Overall, the utility model provides an use sodium polyacrylate resin powder to pack as the sand bag among the prior art, bag body intensity, anti degree of tearing and the not enough problem of support degree have guaranteed the shape side by side, have increased the area of contact with ground, have avoided filling the bag and become oval unexpected removal of taking place to the bag body water-blocking effect is better, can prevent to leak powder and filler and run off.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention;

fig. 2 is a schematic view of an embodiment of the present invention showing the structure of the intermediate layer;

FIG. 3 is a schematic view of an outer layer of an embodiment of the present invention;

FIG. 4 is a schematic view of an outer appearance of an intermediate layer according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of an intermediate layer according to an embodiment of the present invention;

fig. 6 is an enlarged structural view of a three-dimensional mesh structure layer according to an embodiment of the present invention.

Detailed Description

The following embodiments of the present invention will be described in detail, and the following embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

Referring to fig. 1-6, the utility model relates to a speedily carry out rescue work and fire fighting equipment technical field, disclose a high water absorption resin composite filling bag, including the bag body 1, be equipped with filler 2 in the bag body 1 or be equipped with the inlet port that can open and shut, the bag body 1 includes extexine 3 and intermediate level 5, extexine 3 is together fixed with intermediate level 5, its characterized in that, intermediate level 5 comprises skin 6, inlayer 7 and the three-dimensional network structure layer 8 that is located between the two, three-dimensional network structure layer 8 is including the irregular netted accommodation space 9 that communicates mutually, high water absorption resin powder 10 holding is in accommodation space 9.

Further, the bag body 1 may further comprise an inner surface layer 4, and the intermediate layer 5 is located between the inner surface layer 4 and the outer surface layer 3. Normally, the utility model keeps a five-layer structure, but in some occasions with less high operation requirements, the inner surface layer 4 is not needed.

The utility model discloses an occasion that compound bag of filling can use is more, can be used to the flood fighting, water shutoff after piling up, also can be used to insulate against heat. The utility model discloses a middle level cloth blocks water and the supporting material with the holding in the super absorbent resin powder 10 of three-dimensional network fiber structure as the core, and the using-way mixes the back with water before using, can select rivers to spray on the cloth, also can soak in aquatic, until the resin powder in the accommodation space 9 has inhaled sufficient moisture, forms airtight gel layer, can the manger plate outward, prevents the continuous impact of rivers, filler such as sand or water-absorbing resin can be filled to inside, form and pile up the heavy object. In some embodiments, the bag body 1 is provided with an openable and closable inlet, so that a large amount of filler or water can be injected in a short time, and the filled bag can be rapidly formed. Before use, the super absorbent resin powder 10 should be ensured to fully store water and form a dense and mutually bonded gel. It is preferable that some of the water-absorbing resin powder is not absorbed enough and some of the resin powder is not absorbed enough because the bag body 1 is inevitably expanded and deformed during the stacking process, and the resin powder which is not absorbed enough may not absorb enough water for a long time to form gel and expand, which may cause the filling space not to be completely filled, and thus the actual water-blocking effect is not affected.

Superabsorbent resin powder 10 does not itself provide fire and heat blocking and insulation, and all of the water and heat blocking and insulation functions result from the gels after absorbing water, so that the gels cover the entire area requiring water and heat blocking and no air can pass between the gels. Since the dangerous situation is usually very urgent, in order to quickly complete the water absorption, in some embodiments, several layers of hydrophilic materials are designed, and the process from water spraying or soaking to water absorption can be well completed through the design. The cloth made of polyester fiber is not permeable and hydrophilic under many conditions, even some non-woven fabric materials are waterproof, and the situation can cause great difficulty for the cloth needing water absorption, so that the cloth is preferably designed to be a hydrophilic layer in order to enable a plurality of layers of cloth to achieve a stable and smooth water absorption state.

In the prior art, two ways are generally adopted for increasing the strength of the bag body, namely, the cloth with higher strength is replaced; and secondly, the thickness or the number of layers of the bag body is increased so as to achieve the effects of increasing the wear resistance and the tensile strength. However, after practical tests, the strength index of the method is increased, but the method is still far from an ideal use state, and the main problems are reflected in the tensile strength and the forming capability of the bag body, especially if the non-woven fabric cloth is not specially treated, even if the manufactured non-woven fabric cloth is thick or the number of layers is increased, the ideal effect cannot be achieved. If the surface layer of the bag body is treated in a rigid state, the manufacturing cost is increased, the weight of the bag is increased, and the transportation is inconvenient due to the large thickness in the transportation. On the basis of the prior sandbag, a special interlayer is added between the inner layer and the outer layer of the sandbag body, namely the interlayer 5, and the interlayer and the outer surface layer are fixed together. Intermediate level 5 is the sandwich structure that bonds or welding together itself, and the whole tensile and tear intensity is better to because the material is soft light, add the intermediate level after, there is not big influence to the foldability of the bag body, also do not increase too much weight, the volume and the weight influence to the bag body are little under unused state. But can significantly increase the strength and formability of the bag body 1 during use. After a sufficient amount of water is absorbed, the super absorbent resin powder 10 filled in the three-dimensional network structure layer 8 between the outer layer 6 and the inner layer 7 expands and fills the accommodating space 9, and a dense adhesive gel layer is formed in the entire intermediate layer 5. These gel layers can infiltrate all the cloth layers of the bag body to be in the fixation of the space grid structure, and the overall strength of the core part of the bag body 1 is improved, including the tensile tearing strength and the wear resistance. In addition, after water absorption, the gel layer formed by the middle layer 5 completely fills the gap between the outer surface layer 3 and the inner surface layer 4 of the bag body and isolates air, so that the overall structural strength and the tensile strength of the bag body are further enhanced. And the bag body 1 is supported by six expanded outer surfaces 3 to be a cuboid shape, and the filler 2 in the bag body can fully absorb moisture to expand to reach the size predetermined by people. The forming effect and efficiency are far higher than those of a common sand bag or a common sand bag filled with high polymer resin, and the defects that in the prior art, the support strength of a hexagonal sand bag body is not enough, the hexagonal sand bag can only be shaped by fillers, and the hexagonal sand bag is not easy to stack and form are overcome. In addition, even if the outer surface layer 3 is damaged due to large-scale pulling or throwing, the middle layer 5 cannot be damaged, and the filler 2 cannot be leaked, so that the outdoor emergency treatment device is very suitable for being used under severe outdoor emergency conditions.

In addition, in thermal-insulated application, the outer surface of the bag body of the filling bag of the existing design is designed into a hard fireproof layer or a heat-insulating layer with certain strength, wear resistance and fireproof function, the design can effectively prevent the fabric surface layer from being burnt in a short time, and can provide continuous support for the internal heat-insulating material, but the water absorption speed of the product can be seriously influenced, and the requirement of a large amount of water absorption of the heat-insulating cloth in a short time cannot be met. Meanwhile, the cloth is expensive in cost and difficult to process, so that the cloth is difficult and heavy in practical application. For the present invention, due to the existence of the three-dimensional network structure layer 8 of the intermediate layer 5, an irregular network-shaped containing space 9 communicating with each other is formed, and the super absorbent resin powder 10 is contained in the containing space 9. The containing space 9 is stored with a large amount of super absorbent resin powder 10, and once continuously absorbing water, a continuous and compact gel heat insulation layer is formed. Experiments show that the high temperature of 500-800 ℃ can be directly blocked on the outer layer of the heat insulation cloth, so that the temperature of the inner layer of the heat insulation material is only about 50 ℃, and the heat insulation effect is very obvious. In addition, because the network structure in intermediate level firmly fixes the gel layer after will absorbing water on the intermediate level cloth, the utility model discloses a burning out on cloth top layer is no longer afraid to the intermediate level cloth. According to experimental verification, even if the cloth of the outer surface layer 3 is directly burnt, the outer layer 6 is directly burnt through in some places, and only residual carbon net material formed after the cloth is carbonized can be burnt in some places, but no matter what the outer layer 6 and the outer surface layer 3 become, the integrity of the gel layer in the middle layer 5 is basically well preserved. Therefore, the heat insulating effect can be continuously exerted. Among other things, the three-dimensional network structure layer 8 of the intermediate layer 5 having a certain pore size plays a critical role. The fact that the sodium polyacrylate resin powder can insulate heat and extinguish fire after absorbing water is proved, but the sodium polyacrylate resin powder cannot break through the field of fire fighting and emergency rescue in time, and basically, the gel cannot be fixed under the conditions of high temperature and open fire, and the gel falls off. In particular, in emergency fire fighting, when the firewall is stacked, the processes of water absorption, transportation and stacking are subjected to violent rough operation, and the gel layer cannot be cracked and agglomerated due to a plurality of strong actions. The utility model discloses just in time can satisfy above-mentioned requirement, have fine operating strength and thermal-insulated ability.

Furthermore, the control size of the particles of the super absorbent resin powder 10, which accounts for more than 90% of the total weight of the super absorbent resin powder 10, is between 30 and 80 mesh, and the pore size of the three-dimensional network structure layer 8 is substantially consistent with the control size of the particles of the super absorbent resin powder 10. We have found that without sieving the resin particle size, it is possible to achieve a substantial barrier to water after it has absorbed water, but the bag body is somewhat "soft" in its support strength during stacking of the filled bag. Through experimental analysis, we believe that this is likely due to the smaller average size of the resin particles forming the gel layer. For the resin powder with smaller particles, the gel layers formed with other larger resin powder after absorbing water are squeezed with each other to a lower degree, so that the gel layers have good viscosity but weak supporting strength, and the bag body wall still appears to be soft even after absorbing water, so that the strength of the filling bag is reflected to a great extent by the filling amount of the filler 2, and the filling and stacking are influenced. Therefore, we designed to appropriately adjust the average size of the resin particles to be large. Therefore, the gel layer particles formed after water absorption are squeezed and leaned more tightly, the supporting degree is better, a stiffer bag body wall can be formed, and the combination with the three-dimensional net-shaped structure layer 8 is tighter.

In addition, referring to fig. 6, since the three-dimensional network structure layer 8 needs to support the fixing of the super absorbent resin powder 10, the pores should be adapted to the particle size of the powder 10, i.e. most of the network pores formed after processing are suitable for accommodating the resin powder with the particle size of 30-80 mesh, and cannot be too small or too large, otherwise the resin powder may not enter the accommodating space or be fixed well. Since the pores of the three-dimensional network structure layer 8 are not completely consistent, in some embodiments, more than 90% of the pores can be set to be 30-80 mesh. Whether the pores are larger or smaller at between 30-80 mesh is generally determined by the size of the screen, as much as possible to accommodate the size of most resin powder particles. The size of the particles of the super absorbent resin powder 10 is controlled to be within a certain size according to different purposes, the resin powder particles meeting the certain size requirement can be well fixed in the accommodating space 9 of the three-dimensional mesh structure layer 8, small particles can easily move randomly among the gaps of the meshes, and large particles can hardly enter the meshes to be fixed. If the super absorbent resin powder is directly filled without distinguishing the particle size, the irregular free movement of the powder and the leakage of the powder are easily caused, which is avoided to the utmost extent.

Particularly, the resin powder particles with 30-80 meshes have faster water absorption and water permeation rates when water is injected into the high water absorption resin composite filling bag. The water permeability is high, and the filler in the bag can meet the requirement of water absorption capacity in a short time; the water absorption rate is high, so that the high water-absorbent resin composite filling bag can be quickly molded. After the gel layer is formed, the elasticity and the viscosity of the gel are stronger, the integral strength is obviously improved, good intervals can be kept among the gels in the grid, the effect of water blocking and air isolating without gaps among the gels in the grid can be realized, and the integral high water absorption resin composite filling bag after water absorption has higher strength; the time for forming the gel layer meets the requirement, and the thickness and the distribution of the gel layer meet the requirements of flood fighting and emergency rescue. Under the water flow impact, the water absorption particles are not easy to drop and disperse, and the whole firmness is high.

Further, the strength of the three-dimensional mesh-structure layer 8 of the middle layer 5 is configured to ensure that the three-dimensional mesh-structure layer 8 has a thickness of at least 3mm after being bonded with the outer layer 6 and the inner layer 7. The choice of the material of the middle layer 5 is possible, for example, a non-woven fabric meeting the requirements is adopted, in the production practice, a non-woven fabric manufacturer can provide standard products meeting various parameters and specification requirements, and the formula and the process conditions can be adjusted according to the requirements and the requirements of customers, which are conventional operation modes in the field. The specific form of the three-dimensional net structure is various, but the three-dimensional net structure 8 includes the irregular net-shaped accommodating spaces 9 which are communicated with each other, referring to fig. 6, firstly, the fibers are connected into a net, and secondly, the accommodating spaces 9 which are communicated are arranged in the net structure. Only if these two conditions are met will the powder 10 be better held in place without powder falling and gel falling before and during use. In addition, it is important that the three-dimensional net structure 8 has a certain strength, and a certain thickness is still maintained when the inner layer and the outer layer are pressed, and the whole net shape is basically unchanged after the resin powder expands with water, so that the gel layer with a certain thickness can be firmly fixed in the three-dimensional net structure, and the grid can not be broken to cause gel falling when directly facing to flame.

Further, referring to fig. 3-5, the outer layer 6, the inner layer 7 and the three-dimensional mesh-like structure layer 8 are connected together by ultrasonic welding points 11. The lamination of the intermediate layer 5 does not require the use of glue. Owing to adopted the ultrasonic spot welding technique, the utility model discloses need not to apply glue between skin and inlayer, simplified technology greatly to also avoided the glue layer to the interference of super absorbent resin powder physical state, can let the powder absorb the moisture of pouring into better, the accommodation space between whole skin and the inlayer is full of in the inflation more smoothly. When the inner layer and the outer layer are pressed together, the operation condition of high-temperature pressing is not needed, and the speed of resin powder absorbing injected water is not influenced by the fact that redundant glue is heated and melted. Compared with the gluing bonding mode in most prior art, the gluing bonding mode reduces redundant processes, improves the bonding cleanness, eliminates the interference of the adhesive layer on the water absorption and water retention of the resin powder, and can combine three layers of cloth structures together with higher connection strength. The same method can be used for joining the intermediate layer 5 to the outer skin 3 and the inner skin 4.

Further, the ultrasonic welds 11 divide the intermediate layer 5 into a number of relatively spaced individual portions 12. Although we have carried out various technical treatments, because of the physical properties of the powder particles and the three-layer cloth, relative movement is inevitable, in order to reduce the harm brought by the relative movement as much as possible, the ultrasonic welding points 11 are used for replacing a part of functions of the sewing line, the whole cloth is divided into a plurality of independent parts, the integrity and the supporting strength of the middle layer 5 are well maintained, and all effects can be fully exerted after the resin powder absorbs water and swells to form a complete and uniform gel layer.

Furthermore, the outer surface layer 3 is provided with guide grooves 13, and the guide grooves 13 are formed by the ultrasonic welding spots 11. The outer layer of cloth must be permeable to water, preferably in a short time (e.g. tens of seconds to minutes). Therefore, the ultrasonic welding points 11 are used for forming the diversion trenches 13, and the water is led in quickly. In design, the water absorption rate and the water permeability rate of the outer layer 6 are expected to reach higher levels, so that the diversion trench 13 is additionally arranged and can be in an arc shape or a straight line shape. Of course, the diversion trench 13 can also be used to complete the function of sewing line, and the redundant ultrasonic welding spots 11 can be reduced. By utilizing the flow guide grooves 13, the filler 2 can also quickly finish the water absorption process, so that the problem that no water is absorbed inside and the middle layer 5 can not allow flowing water to pass through is solved.

Further, the weld bonding strength of the ultrasonic weld 11 is set so that the ultrasonic weld 11 is spread after the super absorbent resin powder 10 absorbs water. Because the utility model discloses including adding the intermediate level between the extexine, in ultrasonic bonding, reasonable selection ultrasonic strength just can not cause destructive damage to the extexine, and the joint is effectual. In addition, since the bonding strength is not set to be strong, it can be ensured that the movement of the powder particles is well controlled in a non-water-absorbed state; after the minimum water absorption required by flame retardance and heat insulation is achieved, the volume of the resin powder is expanded continuously, so that the ultrasonic welding points can be spread, and a compressed three-dimensional space net structure is released equivalently. Therefore, all the gel formed after water absorption can break through the limitation of ultrasonic welding point dividing lines and be bonded together to form an integral gel layer, the heat insulation layer around the welding points is reinforced, and a more excellent protection effect is achieved.

Furthermore, the outer surface layer 3 is made of hydrophilic non-woven fabrics, canvas and nylon fabrics with tensile strength, the outer layer 6 and the inner layer 7 are made of hydrophilic non-woven fabrics with pore sizes larger than 100 meshes, and the inner surface layer 4 is made of hydrophilic non-woven fabrics. The utility model uses the inner layer 7 and the outer layer 6 with small gaps on the intermediate layer 5, and the pore size of the non-woven fabric material of the outer layer is regulated, so that on one hand, the dry powder can be well prevented from leaking through the inner layer and the outer layer, and the resin powder 10 is prevented from reversely running out; on the other hand, the toughness can be increased. In addition, on the outer surface layer 3, some cloth which is stronger and more durable than the non-woven fabric can be adopted to make up for the inconvenience brought by the physical characteristics of the non-woven fabric material.

Further, the three-dimensional mesh structure layer 8 can be made of non-woven fabric. The selection of the material of the three-dimensional mesh-shaped structure layer 8 is possible, the specific shape of the three-dimensional mesh-shaped structure layer is also various, but the condition that the three-dimensional mesh-shaped structure layer 8 comprises the irregular mesh-shaped accommodating spaces 9 which are communicated with each other is necessary, and referring to fig. 2-6, firstly, the fibers are connected into a three-dimensional mesh shape, and secondly, the accommodating spaces 9 which are communicated are arranged in the mesh-shaped structure. Only if these two conditions are met, the powder 10 can be better inserted into the middle layer 5 and fixed in a reasonable position, and the gel will not be torn off or a gap will not appear even if a large impact is encountered in emergency rescue. Our previous failed experiments show that the resin powder is compressed only by the surface layer and the interlayer, which cannot achieve excellent water-blocking and heat-insulating effects, and it is necessary to ensure that the three-dimensional network structure can maintain the three-dimensional network structure after compression bonding, and the resin powder is expanded around the three-dimensional network frame after water absorption, rather than moving freely without prediction. In general, a commercial nonwoven fabric supplier can accurately adjust some physical parameters of the product, such as the strength and thickness of the skeleton of the three-dimensional network structure, according to the requirements of a buyer, and this can be achieved according to the current practice of the inventor.

Further, the filling bag is shaped like a cube or a rectangular parallelepiped after being filled with the filler 2, and the filler 2 is made of super absorbent resin powder and/or sand. The super absorbent resin has the volume expansion ratio of 100-300 times after absorbing water, has high speed, can well complete the function as a filler, does not have great volume change in a stacked state, but has very small volume before use, and is very suitable for transportation and storage. Because six faces of the bag body all adopt the structure of the middle layer 5, the support and the strength of the six surfaces of the bag body after water absorption are good, and after the filler 2 expands, the filler can be well distributed in the cube or the cuboid bag body, and the shape is regular and favorable for stacking and stacking. In addition, if the filling bag needs a certain weight, a scheme of filling sand can be adopted, so that the weight is increased, and the stacked wall can withstand greater impact. The filling bag usually comprises 6 surfaces, and the inner surface and the outer surface are fixed together in a wiring, gluing and other ways to form a cube or a cuboid which can be laid flat and folded for storage at ordinary times.

Further, the super absorbent resin powder 10 is a polyacrylic acid sodium salt copolymer. Through the tests of our company, not all the super absorbent resin powders can achieve the optimal water absorption swelling effect, the effects of water absorption mixing and state transition among various super absorbent resin powders are obviously different, and the gel effect formed by the super absorbent resin powders after absorbing water has some differences. The indexes such as the water absorption rate, the water absorption multiple, the viscosity, the density and the like of the polyacrylic acid sodium salt copolymer powder are in accordance with the utility model discloses the practical application occasion is very agreeable with, can reach outstanding emergency rescue effect.

Further, the outer surface layer 3 and the middle layer 5, or the outer surface layer 3, the inner surface layer 4 and the middle layer 5 are fixed together by one or more of sewing, bonding or heat sealing. After extexine 3, endosexine 4 are together fixed with intermediate level 5, the bag body 1 has possessed five layers of composite construction in other words, and bulk strength further promotes to in preventing the hot wall application, possible not fear that extexine 3 burns through. In our experiments, flame direct burning of up to 1000 ℃ or more often occurs, and basically the damage or disappearance of the outer fabric of the protective cloth is caused. If the gel is the traditional middle layer, the gel is not connected with each other by a skeleton but is squeezed together, so that the gel can fall off after the cloth surface layer falls off, and a part without gel protection is formed. In a short time, these parts can burn through, resulting in a failure of the insulation protection. The utility model discloses a, because network structure gathers inside and the surface at the gel, played the reinforcing action to the wholeness of gel layer, can form the gel layer on the whole surface of cloth, can not cause earlier burn-through like the former easily at some weak point again. This is particularly important in fire scenes, where the protective material is broken through at all points and the integrity of the other parts is lost.

Further, the space between the outer surface layer 3 and the intermediate layer 5 is filled with the super absorbent resin powder 10. After the gap between the outer surface layer 3 and the intermediate layer 5 is filled with the super absorbent resin powder 10, the outer surface layer 3 is soaked by gel after being soaked, the water blocking effect is obviously improved, and the water blocking performance of the whole filling bag can be improved in an auxiliary manner. In firewall applications, the intermediate layer 5 may be protected from substantial flame-through.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The high-water-absorptivity resin composite filling bag comprises a bag body (1), wherein a filler (2) or an opening and closing inlet is arranged in the bag body (1), the bag body (1) comprises an outer surface layer (3) and a middle layer (5), the outer surface layer (3) and the middle layer (5) are fixed together, the high-water-absorptivity resin composite filling bag is characterized in that the middle layer (5) comprises an outer layer (6), an inner layer (7) and a three-dimensional mesh structure layer (8) positioned between the outer surface layer and the middle layer, the three-dimensional mesh structure layer (8) comprises irregular mesh-shaped accommodating spaces (9) which are mutually communicated, and high-water-absorptivity resin powder (10) is accommodated in the accommodating spaces (9).

2. The superabsorbent resin composite filled bag according to claim 1, wherein the superabsorbent resin powder (10) particles accounting for 90% or more of the total weight of the superabsorbent resin powder (10) have a controlled size of 30 to 80 mesh, and the pore size of the three-dimensional network structure layer (8) is substantially identical to the controlled size of the superabsorbent resin powder (10) particles.

3. The superabsorbent resin composite filled bag according to claim 1, wherein the strength of the three-dimensional network structure layer (8) of the middle layer (5) is configured to ensure that the three-dimensional network structure layer (8) has a thickness of at least 3mm after being joined with the outer layer (6) and the inner layer (7).

4. The superabsorbent resin composite filled bag of claim 1, wherein the outer layer (6), the inner layer (7) and the three-dimensional network structure layer (8) are connected together by ultrasonic welding points (11).

5. The superabsorbent resin composite filled bag according to claim 4, characterized in that the ultrasonic welds (11) divide the intermediate layer (5) into a number of relatively spaced individual portions (12); and/or the outer layer (6) and the inner layer (7) are provided with flow guide grooves (13), and the flow guide grooves (13) are formed by ultrasonic welding spots (11).

6. The high water absorption resin composite filled bag according to claim 4, wherein the welding adhesive strength of the ultrasonic welding spots (11) is set so that the ultrasonic welding spots (11) are spread after the high water absorption resin powder (10) absorbs water.

7. The high water absorption resin composite filled bag according to claim 1, wherein the bag body (1) further comprises an inner surface layer (4), the middle layer (5) is positioned between the inner surface layer (4) and the outer surface layer (3), the inner surface layer (4) and the middle layer (5) are fixedly connected together by one or more of sewing, bonding or heat sealing; the inner surface layer (4) is made of a hydrophilic non-woven fabric material; the outer surface layer (3) is made of one of hydrophilic non-woven fabrics, canvas and nylon cloth materials with tensile strength.

8. The high water absorption resin composite filled bag according to claim 1, wherein the gap between the outer surface layer (3) and the middle layer (5) is filled with the high water absorption resin powder (10), and the outer surface layer (3) and the middle layer (5) are fixed together by one or more of sewing, bonding or heat sealing.

9. The superabsorbent resin composite filled bag according to claim 1, wherein the superabsorbent resin powder (10) is a polyacrylic acid sodium salt copolymer.

10. The superabsorbent resin composite filler bag according to claim 1, wherein the filler bag is in a shape of a cube or a rectangular parallelepiped after being absorbed, expanded and filled by the filler (2); the filler (2) is high water absorption resin powder and/or sand.

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