Film bag

Abstract

A membrane bag comprises a filtering part, sealing layers located on the two sides of the filtering part and a peripheral sealing piece for conducting peripheral sealing on the filtering part. The filtering part comprises a screen and a filtering layer which are alternately stacked, and the filtering layer is fixedly connected with the sealing layer through the peripheral sealing piece; the filtering part comprises a liquid inlet unit and a filtrate unit, each of the liquid inlet unit and the filtrate unit is provided with a packaging hole and a communicating hole, the packaging hole is provided with a hole packaging piece, the liquid inlet unit at least comprises a liquid inlet screen, the filtrate unit at least comprises a filtrate screen, the sealing layer is provided with a liquid inlet hole and a liquid outlet hole, and the liquid inlet hole and the liquid outlet hole are communicated with each other. The liquid inlet hole is in fluid communication with the liquid inlet screen and is in fluid sealing with the filtrate screen; the liquid outlet is in fluid communication with the filtrate screen and is in fluid sealing with the liquid inlet screen; the sealing layer comprises an adhesive layer and a supporting piece, the supporting piece is arranged to be interlaced supporting fibers, and the supporting piece is at least partially located in the adhesive layer; the supporting effect and the sealing strength of the sealing layer on the filtering part are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of filter device, in particular to a membrane package. BACKGROUND

[0002] The membrane package usually comprises a filter part and a sealing structure, wherein the filter part is formed by stacking a screen and a filter layer, and the sealing structure usually comprises a peripheral seal for sealing the periphery of the screen. In order to further increase the sealing effect, the existing membrane package also has a sealing layer arranged at the end side of the filter part.

[0003] The existing sealing layer usually adopts a sealing gasket structure, but due to the extrusion of external clamps on the end part of the membrane package during production and use, the existing sealing gasket structure is usually arranged as a flexible gasket or a rigid gasket. When the sealing gasket is arranged as a flexible gasket, on the one hand, the flexible gasket is prone to excessive deformation under the action of external force during extrusion, which affects its flatness and further affects the stability and sealing performance of the connection between the flexible gasket and the membrane package. On the other hand, the flexible gasket is also prone to being pierced by external structures, which further affects the sealing effect of the end part of the filter part. When the sealing gasket is arranged as a rigid gasket, the sealing performance between the rigid gasket and the filter part will be poor, which will easily cause the risk of liquid leakage. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art, thereby providing a membrane package. In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A membrane package comprises a filter part, sealing layers arranged at both sides of the filter part, and a peripheral seal for sealing the periphery of the filter part.

[0006] The filter part comprises alternately stacked screen and filter layer, and the filter layer is fixedly connected with the sealing layer through the peripheral seal.

[0007] The filter part comprises a liquid inlet unit and a filtrate unit, both of which have an encapsulation hole and a communication hole, and the encapsulation hole is provided with a hole encapsulation piece. The liquid inlet unit comprises at least a liquid inlet screen, and the filtrate unit comprises at least a filtrate screen. The sealing layer has a liquid inlet hole and a liquid outlet hole. The liquid inlet hole is in fluid communication with the liquid inlet screen and is in fluid sealing with the filtrate screen. The liquid outlet hole is in fluid communication with the filtrate screen and is in fluid sealing with the liquid inlet screen.

[0008] The sealing layer comprises a glue layer and a support piece, the support piece is arranged as interlaced support fibers, and the support piece is at least partially located in the glue layer to improve the structural strength of the glue layer.

[0009] The above-described scheme employs a composite system of adhesive layer and support component in the outermost sealing layer of the membrane pack. The adhesive forming the adhesive layer can be injected into the support component through injection molding or other methods. The support component enhances the overall strength of the sealing layer, providing better puncture and impact resistance. Simultaneously, it ensures the membrane pack maintains its shape after repeated compression by clamps or other equipment, thus maintaining good sealing performance. Understandably, the composite structure of adhesive layer and support component in the sealing layer ensures a certain degree of flexibility, providing elasticity and compressibility, facilitating stacking between the sealing layer and the inner filter section and the membrane pack. Simultaneously, it improves the strength of the sealing layer, providing better protection.

[0010] Furthermore, by setting the support member as interwoven support fibers, on the one hand, the adhesive in the adhesive layer can fill the pores formed by the interwoven support fibers, which can increase the connection area between the support member and the adhesive layer, thereby increasing the connection strength between the two; on the other hand, it can make the support member evenly interwoven in the adhesive layer, increasing the support strength of the support member, making the sealing layer more flat when under stress, and further maintaining good sealing performance.

[0011] Preferably, on the plane where the sealing layer is located, the projection of the support member covers 30%-70% of the area of ​​the sealing layer.

[0012] By rationally setting the proportion of the support component's area covering the entire sealing layer area, we can avoid the sealing layer becoming too elastic due to an excessively large support component coverage area, and also avoid the sealing layer becoming too weak due to an excessively small support component coverage area. It is worth noting that "the projection of the support component covering 30%-70% of the sealing layer area" refers to the proportion of the projected area of ​​the support component's fibers on the plane of the sealing layer (excluding the area of ​​holes opened on the support component, such as inlet or outlet holes) to the total area of ​​the sealing layer (excluding the area of ​​inlet and outlet holes opened on the sealing layer).

[0013] Preferably, the outermost layer structure of the filter section is configured as a screen, and the perforated encapsulation on the outermost screen protrudes from the end face of the screen on the side facing the sealing layer and is pressed together with the sealing layer.

[0014] By the above scheme, the outermost side of the filter part is provided with a screen, so that the two sides of any filter layer are provided with screens, thereby increasing the stability of the formed flow channel, and even at the outermost side of the filter part, the filter effect of the filter layer will not be lost due to the direct abutment of the sealing layer against the filter layer. Further, the hole packaging piece on the outermost screen protrudes from the end face of the screen and is in extrusion connection with the sealing layer. On the one hand, the hole packaging piece can provide a certain support height to keep the outermost flow channel unobstructed. On the other hand, considering that the outermost side of the membrane package is usually directly attached to the clamp, the extrusion connection between the sealing layer and the hole packaging piece can make the membrane package have better sealing performance.

[0015] Preferably, the outermost side of the filter part is provided with a screen, and the glue layer covers the hole packaging piece on the outermost screen, and the support has a give-way area opposite the hole packaging piece.

[0016] The give-way area is in abutment with the hole packaging piece.

[0017] By the above scheme, the support has a give-way area opposite the hole packaging area, which can reduce the hardness of the sealing layer opposite the surrounding of the packaging hole, so that the position of the sealing layer opposite the hole packaging piece on the outermost screen can be deformed better, the abutment effect of the sealing layer and the hole packaging piece is increased, and the sealing performance at the hole packaging piece is improved. At the same time, around the give-way area, the support can still form a good reinforcing and supporting effect, and the stability of the structure around the hole is improved.

[0018] Preferably, the outer side wall edge of the support protrudes from the outer side wall of the glue layer to form a protruding part.

[0019] The peripheral sealing piece penetrates into the protruding part to form a combined part.

[0020] By the above scheme, the stability of the connection between the peripheral sealing piece and the sealing layer is increased, the structure of the whole membrane package is more stable, and the sealing effect of the sealing layer on the filter part is increased.

[0021] Preferably, the peripheral sealing piece further comprises an independent part outside the combined part.

[0022] The ratio of the width of the combined part to the width of the independent part is in the range of 1:0.5-5.

[0023] By the above scheme, the widths of the combined part and the independent part are reasonably set, which can ensure good sealing effect and connection stability, and can also avoid that the whole membrane package is too wide.

[0024] Preferably, the outermost side of the filter part is a screen, and the shortest distance between the outer edge of the glue layer and the hole packaging piece is not less than 1mm.

[0025] Through the above scheme, since the overall hardness of the peripheral sealing member is large, a larger width is reserved between the outer edge of the glue layer (i.e. the inner edge of the protruding part) and the outer edge of the hole sealing member, which can avoid the glue liquid of the peripheral sealing member being too close to the hole sealing member position, thereby affecting the deformation effect of the hole sealing member, and further avoiding the extrusion sealing effect of the packaging hole, which helps to improve the sealing performance.

[0026] Preferably, the outer edge of the glue layer protrudes outward to form an extension area corresponding to the position of the packaging hole on the outermost liquid inlet unit or filtrate unit.

[0027] Through the above scheme, the formation of the extension area can make the peripheral sealing member have more penetration in the communication hole area, while the distance between the peripheral sealing member and the packaging hole in the packaging hole area can also be better controlled, which not only reduces the influence of the relatively hard peripheral sealing member on the hole packaging area, but also improves the overall firmness and support performance of the peripheral sealing member, and forms a good flow channel support effect in the communication hole area.

[0028] Preferably, the outer edge of the glue layer is recessed inward to form a recessed area corresponding to the position of the communication hole on the outermost liquid inlet unit or filtrate unit, and the recessed area is smoothly connected with the extension area.

[0029] In the above scheme, the smooth connection between the recessed area and the extension area can improve the connection strength and stability between the peripheral sealing member and the edge of the glue layer. At the same time, the smooth edge of the glue layer (such as a wave-shaped setting) forms a flow channel outer contour that is more conducive to liquid flow, so that the liquid can flow more smoothly along the inner edge of the peripheral sealing member, and the structure of the recessed area closer to the communication hole allows the fluid to flow out more smoothly through the communication hole, reducing the flow dead angle and thereby reducing the problem of reduced filtration efficiency caused by liquid retention in the outermost screen.

[0030] Preferably, the support member does not protrude to the glue layer on the side of the glue layer facing the filter part.

[0031] Through the above scheme, the side of the support member facing the filter part does not protrude to the glue layer, so that the glue layer of the sealing layer abuts against the end face of the filter part. When the outermost side of the filter part is a screen, the fiber structure of the support member can avoid affecting the sealing performance between the sealing layer and the end face of the filter part. When the outermost side of the filter part is a filter layer, the fiber structure of the support member can also avoid puncturing the filter layer during the membrane package extrusion process, thereby ensuring the sealing performance between the sealing layer and the end face of the filter part.

[0032] Preferably, the hardness of the sealing layer is not higher than 90 Sha A; and / or, the hardness of the peripheral sealing member is greater than the hardness of the sealing layer; and / or, the ratio of the thickness of the support member to the thickness of the sealing layer is 1:1-2.

[0033] Through the above scheme, by using a relatively soft sealing layer, on the one hand, the soft surface can better fit the filter part, and at the same time, the reliability of the packaging process is improved, and at the same time, the relatively soft system also has better protection performance, reduces the deformation and damage that may exist in the whole film package, and the hard peripheral sealing member can fix and seal the sealing layer.

[0034] Further, the thickness ratio of the sealing layer and the support layer is reasonably set, and the thickness of the sealing layer is slightly larger than the overall thickness of the support member, which not only ensures the overall strength of the support member, but also increases the deformation capacity of the sealing layer structure by using a relatively soft glue layer, thereby reducing the influence of the sealing layer on the filter part during the pressing process.

[0035] Compared with the prior art, the utility model has at least the following beneficial effects:

[0036] 1. By selecting the composite system of glue layer and support member in the outermost sealing layer of the film package, the glue solution forming the glue layer can penetrate into the support member by injection molding or other methods, the overall strength of the sealing layer is improved by using the support member, the sealing layer has better puncture resistance and impact resistance, and after the film package is repeatedly extruded by the clamp or other equipment, the shape of the film package can be kept stable, thereby the good sealing performance can be kept. It can be understood that the sealing layer adopts the composite structure of glue layer and support member, which not only ensures a certain flexibility, but also has a certain elasticity and pressing performance, which facilitates the stacking use of the sealing layer, the inner filter part and the film package, and also improves the sealing layer strength and has better protection performance. Further, the support member is set as interlaced support fibers, on the one hand, the glue of the glue layer can be filled in the holes formed by the interlaced support fibers, the connection area of the support member and the glue layer can be increased, and the connection strength of the two is increased; on the other hand, the support member can be formed in the glue layer in an interlaced manner, the support strength of the support member is increased, the sealing layer is more flat when stressed, and the good sealing performance is further kept.

[0037] 2. The support member has a giving area opposite the hole packaging area, which can reduce the hardness of the sealing layer opposite the packaging hole, so that the position of the sealing layer opposite the outermost screen hole packaging member can better deform, the abutting effect of the sealing layer and the hole packaging member is increased, and the sealing performance at the hole packaging member is improved.

[0038] 3. The formation of the extension area can make the peripheral sealing member penetrate more in the communication hole area, and at the same time, the distance between the peripheral sealing member and the packaging hole in the packaging hole area can be better controlled, which not only reduces the influence of the relatively hard peripheral sealing member on the hole packaging area, but also improves the overall firmness and support performance of the peripheral sealing member, and forms a good flow channel support effect in the communication hole area. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0040] Figure 1 It is a structural schematic view of the embodiment one of the present application.

[0041] Figure 2 It is a structural schematic view of the embodiment one of the present application. Figure 1 It is an enlarged schematic view of D1 position.

[0042] Figure 3 It is a structural schematic view of the embodiment one of the present application. Figure 1 It is a structural schematic view of the sealing layer.

[0043] Figure 4 It is a structural schematic view of another example of the sealing layer.

[0044] Figure 5 It is a structural schematic view of the embodiment two of the present application.

[0045] Figure 6 It is a structural schematic view of the embodiment two of the present application. Figure 5 It is an enlarged schematic view of D2 position.

[0046] Figure 7 It is a structural schematic view of the embodiment two of the present application. Figure 6 It is a structural schematic view of the sealing layer.

[0047] Figure 8 It is a structural schematic view of the embodiment two of the present application (only the sealing layer and the outermost screen are shown).

[0048] Figure 9 It is a structural schematic view of the embodiment two of the present application. Figure 8 It is an enlarged schematic view of D3 position.

[0049] Explanation of reference signs:

[0050] 1, sealing layer; 11, liquid inlet hole; 12, liquid outlet hole; 13, glue layer; 131, outer extension area; 132, recessed area; 14, support; 141, protruding part; 2, peripheral sealing member; 21, combined part; 22, independent part; 3, screen; 31, liquid inlet screen; 32, filtrate screen; 4, filter layer; 41, filter layer liquid inlet hole; 42, filter layer liquid outlet hole; 5, hole packaging member; 51, liquid inlet screen filtrate hole; 52, filtrate screen liquid inlet hole; 6, communication hole; 61, liquid inlet screen liquid inlet hole; 62, filtrate screen filtrate hole; 7, hole packaging member; 8, accommodation area. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0052] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] Embodiment one

[0055] Referring to Figures 1 to 3 The embodiment of the present application provides a membrane package, which comprises a filter part, a sealing layer 1 located on both sides of the filter part, and a peripheral sealing element 2 for peripherally sealing the filter part. Wherein, the filter part is a structure for filtering effect of the membrane package, the sealing layer 1 is used for sealing the end part of the filter part, and the peripheral sealing element 2 is used for sealing the peripheral side of the filter part.

[0056] Specifically, the filter part comprises alternatingly stacked screen 3 and filter layer 4, and the filter layer 4 is fixedly connected with the sealing layer 1 through the peripheral sealing element 2, so as to increase the stability and sealing effect of the connection of the filter layer 4, the peripheral sealing element 2 and the sealing layer 1. The filter part comprises a liquid inlet unit and a filtrate unit, the liquid inlet unit and the filtrate unit both have an encapsulation hole 5 and a communication hole 6, and the encapsulation hole 5 has a hole encapsulation element 7.

[0057] Further, the liquid inlet unit comprises a liquid inlet screen 31, and the filtrate unit comprises at least a filtrate screen 32 and a filter layer 4, the liquid inlet screen 31, the filter layer 4 and the filtrate screen 32 are alternately stacked to form a filter part. The sealing layer 1 has a liquid inlet hole 11 and a liquid outlet hole 12, the liquid inlet hole 11 is in fluid communication with the liquid inlet screen 31 and is fluidly sealed with the filtrate screen 32; the liquid outlet hole 12 is in fluid communication with the filtrate screen 32 and is fluidly sealed with the liquid inlet screen 31.

[0058] It can be understood that the encapsulation hole 5 on the liquid inlet screen 31 is a liquid inlet screen filtrate hole 51, and the encapsulation hole 5 on the filtrate screen 32 is a filtrate screen liquid inlet hole 52; the communication hole 6 on the liquid inlet screen 31 is a liquid inlet screen liquid inlet hole 61, and the communication hole 6 on the filtrate screen 32 is a filtrate screen filtrate hole 62. Correspondingly, the filter layer 4 is also provided with a corresponding filter layer liquid inlet hole 41 and a filter layer liquid outlet hole 42. In the process of stacking the membrane package, the liquid inlet screen filtrate hole 51, the filter layer liquid outlet hole 42, the filtrate screen filtrate hole 62 and the liquid outlet hole 12 are arranged opposite to each other, and the filtrate screen liquid inlet hole 52, the filter layer liquid inlet hole 41, the liquid inlet screen liquid inlet hole 61 and the liquid inlet hole 11 are arranged opposite to each other.

[0059] Further, the sealing layer 1 comprises a glue layer 13 and a support 14, and the support 14 is partially located in the glue layer 13 to improve the structural strength of the glue layer 13. It can be understood that the composite system of the glue layer 13 and the support 14 is selected in the sealing layer 1 on the outermost side of the membrane package, wherein the glue liquid forming the glue layer 13 can penetrate into the support 14 by injection molding or other methods, and the overall strength of the sealing layer 1 is improved by using the support 14, so that it has better puncture resistance and impact resistance. At the same time, the shape of the membrane package can remain stable after being repeatedly extruded by a clamp or other equipment, thereby maintaining good sealing performance. It ensures that the sealing layer 1 has a certain flexibility, so that it has a certain elasticity and compression performance, which facilitates the stacking of the sealing layer 1, the inner filter part and the membrane package. At the same time, it also improves the structural strength of the sealing layer 1, so that the sealing layer 1 has better protection performance. Of course, in other embodiments, the support 14 can also be completely located in the glue layer 13.

[0060] Further, the support 14 is arranged as interlaced support fibers, which can fill the glue layer 13 into the holes formed by the interlaced support fibers, increase the connection area between the support 14 and the glue layer 13, and further increase the connection strength between the two; on the other hand, the support 14 can be formed in the glue layer 13 in a staggered manner, which can increase the support strength of the support 14, so that the sealing layer 1 is more flat when stressed, and further maintains good sealing performance.

[0061] Referring to Figures 1 to 3In the plane where the sealing layer 1 is located, the projection of the support 14 covers 30%, 50% or 70% of the area of the sealing layer 1. It should be understood that the projection of the support 14 covers 30%-70% of the entire area of the sealing layer 1 can also be satisfied. Further, by reasonably setting the proportion of the area of the support 14 covering the entire area of the sealing layer 1, it can be avoided that the excessive coverage of the support 14 leads to insufficient elasticity of the entire sealing layer 1, and it can also be avoided that the small coverage of the support 14 leads to poor strength of the sealing layer 1.

[0062] Specifically, the support 14 is provided as a whole net structure, the outermost layer structure of the filtering part is provided as the screen 3, and the glue layer 13 covers the hole sealing member 7 on the outermost screen 3. In the embodiment, the outermost layer structure of the filtering part is also provided as the liquid inlet screen 31, and the glue layer 13 covers the hole sealing member 7 located on the liquid inlet screen 31 and surrounding the liquid inlet screen filtrate hole 51. In another embodiment, the outermost layer structure of the filtering part is also provided as the filtrate screen 32, and at this time, the glue layer 13 covers the hole sealing member 7 provided around the liquid inlet hole 52 of the filtrate screen.

[0063] Of course, in another embodiment, the support 14 can also be provided as a frame structure (see Figure 4 The support 14 is connected to the glue layer 13 near the inner side area of the film package, and is connected to the peripheral sealing member 2 near the outer side area of the film package.

[0064] Referring to Figures 1 to 3 In order to increase the stability of the connection between the peripheral sealing member 2 and the sealing layer 1, make the structure of the film package more stable, and at the same time, increase the sealing effect of the sealing layer 1 on the filtering part, in the embodiment, the outer side wall edge of the support 14 protrudes from the outer side wall of the glue layer 13 to form a protruding part 141; the peripheral sealing member 2 penetrates into the protruding part 141 to form a combined part 21.

[0065] Further, the peripheral sealing member 2 also includes a separate part 22 located outside the combined part 21; the ratio of the width W21 of the combined part 21 to the width W22 of the separate part 22 is 2, 3, 4 or 5. It should be understood that the ratio of the width W21 of the combined part 21 to the width W22 of the separate part 22 can be in the range of 1:0.5-5, and by reasonably setting the widths of the combined part 21 and the separate part 22, it can be ensured that the better sealing effect and connection stability are achieved, and at the same time, it can be avoided that the width of the entire film package is too large.

[0066] Further, the outermost side of the filter part is the screen 3, and the shortest distance between the outer edge of the glue layer 13 and the hole sealing member 7 is not less than 1 mm. When determining the shortest distance between the outer edge of the glue layer 13 and the hole sealing member 7, the hole sealing member 7 can be projected to the plane where the glue layer 13 is located, and then a plurality of rays can be drawn from the center of the liquid hole 12, one intersection point is formed between the outer edge of the glue layer 13 and the outer edge of the hole sealing member 7, and the other intersection point is formed between the outer edge of the glue layer 13 and the outer edge of the hole sealing member 7, and then the distance between the two intersection points on the same ray can be found, and the minimum value is the shortest distance between the outer edge of the glue layer 13 and the hole sealing member 7.

[0067] Referring to Figures 1 to 3 The support 14 does not protrude from the glue layer 13 on the side of the glue layer 13 facing the filter part. Specifically, the thickness of the support 14 can be slightly smaller than the thickness of the glue layer 13, so that the glue layer 13 of the sealing layer 1 abuts against the end surface of the filter part; both the support strength of the support 14 and the influence of the support 14 on the filter part can be ensured. For example, when the outermost side of the filter part is the screen 3, the fiber structure of the support 14 can avoid affecting the sealing between the sealing layer 1 and the end surface of the filter part, and when the outermost side of the filter part is the filter layer 4, the fiber structure of the support 14 can also avoid puncturing the filter layer 4 in the process of film bag extrusion, thereby ensuring the sealing between the sealing layer 1 and the end surface of the filter part. Of course, in other embodiments, the thickness of the support 14 can be equal to the thickness of the glue layer 13.

[0068] It is worth noting that the thickness of the support 14 refers to the distance between the highest point and the lowest point of all the fibers of the support 14 interwoven in the cross section of the support 14.

[0069] Further, the hardness of the peripheral sealing member 2 is greater than the hardness of the sealing layer 1. It can be understood that the relatively soft sealing layer 1 is used in the embodiment, on the one hand, the soft surface can better fit the filter part, and the reliability of the packaging process is improved, and on the other hand, the relatively soft system also has better protection performance, which reduces the possible deformation and damage of the film bag as a whole, and the hard peripheral sealing member 2 can fix and seal the sealing layer 1.

[0070] Further, the sealing layer 1 has a hardness of not higher than 90 shao A.

[0071] Further, the ratio of the thickness of the support 14 to the thickness of the sealing layer 1 is 1:1, 1:1.5 or 1:2. It should be understood that the thickness ratio of the two can be in the range of 1:1-2, and the thickness ratio of the sealing layer 1 and the support layer is reasonably set, and the thickness of the sealing layer 1 is overall slightly greater than the overall thickness of the support 14, which not only ensures the overall strength of the support 14, but also increases the deformation ability of the sealing layer 1 structure by using the relatively soft glue layer 13, thereby reducing the influence of the sealing layer 1 on the filter part in the pressing process.

[0072] It is worth mentioning that the "thickness of the sealing layer 1" refers to the distance between the highest point and the lowest point in the cross section of the entire sealing layer 1. The thickness of the sealing layer 1 can be equal to the thickness of the glue layer 13, or the sum of the thicknesses of the glue layer 13 and the support 14.

[0073] Embodiment two

[0074] Referring to Figures 5 to 7 Based on the above embodiment one, the difference of the present embodiment is that the support 14 has a displacement area 8 at the position of the hole sealing piece 7 (specifically, the hole sealing piece 7 on the side of the liquid inlet screen filter hole 51) of the outermost screen 3; the displacement area 8 abuts against the hole sealing piece 7.

[0075] It should be understood that the displacement area 8 is filled with glue, which is part of the glue layer 13. The glue layer 13 is a flexible structure, which can reduce the hardness of the sealing layer 1 around the sealing hole 5, so that the position of the sealing layer 1 on the hole sealing piece 7 of the outermost screen 3 can better deform, increase the abutting effect of the sealing layer 1 and the hole sealing piece 7, and further improve the sealing performance at the hole sealing piece 7.

[0076] It should also be understood that the displacement area 8 does not necessarily correspond strictly to the hole sealing piece 7, that is, the size and edge do not necessarily correspond completely, as long as the displacement area 8 completely covers the hole sealing piece 7 or partially covers the hole sealing piece 7.

[0077] It is worth mentioning that in the present embodiment, the outer edge of the displacement area 8 coincides with the outer edge of the hole sealing piece 7, so in the present embodiment, the "shortest distance from the outer edge of the glue layer 13 to the hole sealing piece 7" is the shortest distance from the outer edge of the glue layer 13 to the edge of the displacement area 8. A plurality of rays can be drawn from the center of the outlet hole 12, and the rays form an intersection point with the displacement area 8 and another intersection point with the outer edge of the glue layer 13, and then the distance between the two intersection points on the same ray can be found, and the minimum value is the shortest distance from the outer edge of the glue layer 13 to the hole sealing piece 7.

[0078] It should be understood that because the overall hardness of the peripheral sealing member 2 is relatively large, a larger width is reserved between the outer edge of the glue layer 13 (i.e. the inner edge of the protruding part 141) and the outer edge of the hole sealing piece 7, which can avoid the glue liquid of the peripheral sealing member 2 being too close to the position of the sealing hole 5, thereby affecting the deformation effect of the hole sealing piece 7, and further avoiding affecting the extrusion sealing effect of the sealing hole 5, which helps to improve the sealing performance.

[0079] Embodiment three

[0080] Referring to Figure 8 and Figure 9, based on the above embodiment two, the difference of this embodiment is that the outer edge of the glue layer 13, corresponding to the position of the packaging hole 5 on the outermost liquid inlet screen 31 (i.e. the liquid inlet screen liquid hole 51), protrudes outward to form an extension area 131 compared to the position of the communication hole 6 on the outermost liquid inlet screen 31 (i.e. the liquid inlet screen liquid hole 61), so that the peripheral seal 2 has more penetration in the communication hole 6 area, while the distance between the peripheral seal 2 and the packaging hole 5 in the packaging hole 5 area can also be better controlled, which reduces the influence of the relatively hard peripheral seal 2 on the hole packaging area, while also improving the overall firmness and support performance of the peripheral seal 2, and forming a good flow channel support effect in the communication hole 6 area. At the same time, between the adjacent extension areas 131, in the area corresponding to the communication hole 6 on the outermost liquid inlet screen 5 (i.e. the liquid inlet screen liquid hole 62), i.e. the edge of the glue layer 13 between the adjacent extension areas 131 is inwardly recessed to form a recessed area 132, in this embodiment, the extension area 131 and the recessed area 132 are selected to have a smooth connection of arc-shaped edge structure, and form a wave shape as a whole, which is more convenient for the peripheral seal 2 to penetrate evenly into the protruding part 141, so that the support 14 can be better combined into the peripheral seal 2, and at the same time, it is also helpful for the liquid to flow along the inner edge of the arc-shaped connection when flowing along the inner edge of the peripheral seal 2, to reduce the flow resistance, and smoothly pass through the liquid inlet screen liquid hole 61 when approaching the liquid inlet screen liquid hole 61, thereby reducing the flow dead angle and improving the filtering effect.

[0081] Of course, in other embodiments, the outer edge of the glue layer 13, corresponding to the position of the packaging hole 5 on the outermost liquid inlet screen 31 (i.e. the liquid inlet screen liquid hole 51), protrudes outward to form an extension area 131 compared to the position of the communication hole 6 on the outermost liquid inlet screen 31 (i.e. the liquid inlet screen liquid hole 61).

[0082] It is also worth noting that the openings for liquid inlet and outlet on the film package can be set according to specific needs. For example:

[0083] In this embodiment, the liquid inlet hole 11 and the liquid outlet hole 12 are symmetrically arranged on both sides of the sealing layer 1, and the liquid inlet hole 11 and the liquid outlet hole 12 on the same side are alternately arranged. The sealing layer 1 is provided with a liquid inlet hole 11 near the corner area, and the corresponding packaging hole 5 and communication hole 6 on the screen 1 are also correspondingly arranged. Taking the liquid inlet screen 31 as an example, the liquid inlet screen liquid hole 51 and the liquid inlet screen liquid hole 61 on the liquid inlet screen 31 are also alternately arranged, and the liquid inlet screen liquid hole 61 is located at the corner position of the liquid inlet screen 31.

[0084] In the first embodiment, the sealing layer 1 near the corner position is the liquid outlet hole 12, and the liquid inlet screen liquid hole 51 on the liquid inlet screen 31 is also located near the corner position, and the liquid inlet screen liquid hole 62 on the liquid inlet screen 31 is also located near the corner position.

[0085] In other embodiments, only one liquid inlet hole 11 and one liquid outlet hole 12 are arranged on both sides of the sealing layer 1, and the liquid inlet hole 11 and the liquid outlet hole 12 on both sides are arranged in a cross manner. Correspondingly, the liquid inlet screen 31 and the filtrate screen 32 are arranged correspondingly, and details are not described herein.

[0086] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A film package characterized by, The filter part, the sealing layers on both sides of the filter part, and the peripheral seal for peripherally sealing the filter part; The filter part comprises sieve screens and filter layers alternately stacked, and the filter layers are fixedly connected with the sealing layers through the peripheral seal; The filter part comprises a liquid inlet unit and a filtrate unit, and both the liquid inlet unit and the filtrate unit have an encapsulation hole and a communication hole, the encapsulation hole is provided with a hole encapsulation element, the liquid inlet unit comprises at least a liquid inlet sieve screen, the filtrate unit comprises at least a filtrate sieve screen, the sealing layer has a liquid inlet hole and a filtrate outlet hole, the liquid inlet hole is in fluid communication with the liquid inlet sieve screen and is in fluid sealing with the filtrate sieve screen, and the filtrate outlet hole is in fluid communication with the filtrate sieve screen and is in fluid sealing with the liquid inlet sieve screen; The sealing layer comprises a glue layer and a support element, the support element is provided as interlaced support fibers, and the support element is at least partially located in the glue layer to improve the structural strength of the glue layer.

2. The film package of claim 1, wherein In the plane where the sealing layer is located, the projection of the support element covers 30%-70% of the area of the sealing layer.

3. The film package of claim 1, wherein The outermost layer structure of the filter part is provided as a sieve screen, the hole encapsulation element on the outermost sieve screen protrudes from the end face of the sieve screen towards the side of the sealing layer and is in extrusion connection with the sealing layer.

4. The film package of claim 1, wherein The outermost layer structure of the filter part is provided as a sieve screen, the glue layer covers the hole encapsulation element on the outermost sieve screen, and the support element has a giving-in area opposite the hole encapsulation element; The giving-in area is in abutment with the hole encapsulation element.

5. The film package of claim 1, wherein The outer side wall edge of the support element protrudes from the outer side wall of the glue layer to form a protruding part; The peripheral seal penetrates into the protruding part to form a combined part.

6. A film packet according to claim 5, characterised in that The peripheral seal further comprises an independent part located outside the combined part; The ratio of the width of the combined part to the width of the independent part is in the range of 1:0.5-5.

7. The film package of claim 5, wherein The outermost layer of the filter part is a sieve screen, and the shortest distance from the outer edge of the glue layer to the hole encapsulation element is not less than 1 mm.

8. The film package of claim 1, wherein The outer side edge of the glue layer protrudes outward to form an extension area corresponding to the position of the encapsulation hole on the outermost liquid inlet unit or filtrate unit.

9. The film package of claim 8, wherein, The outer side edge of the glue layer is recessed inward to form a recessed area corresponding to the position of the communication hole on the outermost liquid inlet unit or filtrate unit, and the recessed area is smoothly connected with the extension area.

10. The film package of claim 1, wherein, The support element does not protrude from the glue layer on the side of the glue layer facing the filter part.

11. The film package of claim 1, wherein, The sealing layer has a hardness of not higher than 90 Sha A; and / or, the hardness of the peripheral seal is greater than that of the sealing layer; and / or, the ratio of the thickness of the support element to the thickness of the sealing layer is 1:1-2.

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