Composite microporous membrane and composite device thereof

Abstract

The utility model aims to disclose a composite microporous membrane and a composite device thereof, which relate to the technical field of microporous membrane processing, and comprise a support membrane and a microporous membrane compounded on the support membrane, the utility model discloses a composite microporous membrane which comprises a support membrane and a microporous membrane, a composite area and a non-composite area are arranged between the support membrane and the microporous membrane, the composite area is positioned on two edges of the support membrane, and the area outside the composite area is the non-composite area. Compared with the prior art, the composite microporous membrane has the technical effects that the microporous membrane is relatively soft and cannot be subjected to post-processing through a modification process and a device in a flat manner; according to the composite material disclosed by the utility model, the supporting membrane with pores is used as a supporting layer, only the two edges of the microporous membrane are compounded with the supporting membrane to form a composite region, and other regions are non-composite regions; under the driving of the supporting membrane, the supporting layer is flatly modified, and after the modification is completed, the supporting layer is stripped and recovered into a single-layer microporous membrane, so that the reprocessing of the soft microporous membrane under the condition that the two sides of the microporous membrane do not need to be clamped by a clamp is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of microporous membrane processing, in particular to a composite microporous membrane and a composite device thereof. Background Art

[0002] Microporous membranes, such as PTFE stretch membranes, electrospinning membranes and phase conversion membranes, are thin and very soft. In the process of processing microporous membranes, such as the process of modifying the microporous membranes, they need to pass through different forms of guide rollers, and the microporous membranes are prone to wrinkles and shrinkage. For example, the expansion rate of PTFE stretch membranes can reach 20%, resulting in poor consistency of the modification reaction on the surface of the microporous membrane and poor flatness of the product. At present, clamps are required to clamp the two sides of the microporous membrane respectively. On the one hand, the microporous membrane passes through the modification liquid and the guide roller in a flat state. However, due to the strong acid or strong alkali characteristics of the modification liquid, high temperature and high humidity will also be generated during the reaction, accompanied by As strong oxidizing substances are produced, the clamps are easily corroded and damaged, resulting in a high frequency of clamp replacement, which is not conducive to stable production and has high production costs. On the other hand, some microporous membranes have a large shrinkage at a certain temperature, and the clamping form of the clamps has a certain interval between the clamps. The width of the microporous membrane does not shrink in the clamping part of the clamps but shrinks in the part where the clamps are spaced apart. This leads to problems with the consistency of the modification reaction of the two products and the stability of the product performance. The manufacturing cost of the microporous membrane clamping system is high, and the clamp clamping needs to cover the processes of microporous membrane unwinding, loading, modification reaction, cleaning, drying, and winding.

[0003] In view of this, it is necessary to develop a composite microporous membrane and a composite device thereof to solve the above problems. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the utility model is to disclose a composite microporous membrane and a composite device thereof.

[0005] The first invention purpose of the utility model is to develop a composite microporous membrane.

[0006] The second invention purpose of the utility model is to develop a microporous membrane composite device.

[0007] In order to achieve the above first invention objective, the utility model provides a composite microporous membrane, comprising a support membrane and a microporous membrane composited to the support membrane;

[0008] A composite area and a non-composite area are provided between the support membrane and the microporous membrane. The composite area is located at two edges of the support membrane, and the area outside the composite area is a non-composite area.

[0009] Preferably, the composite region is also located in the middle of the support membrane.

[0010] Preferably, the width of the composite region is 5 mm-20 mm.

[0011] Preferably, the width of the support membrane and the microporous membrane are both 300 mm-1600 mm.

[0012] Preferably, the support membrane is a nonwoven fabric or a porous mesh, and the microporous membrane is a PTFE stretched membrane, an electrospinning membrane or a phase conversion membrane.

[0013] To achieve the above second invention objective, the utility model provides a microporous membrane composite device, comprising a rotating shaft driven by a motor and a first rolling wheel and a second rolling wheel installed on the rotating shaft;

[0014] A first ultrasonic welding head is arranged below the first hemming wheel, and a second ultrasonic welding head is arranged below the second hemming wheel.

[0015] Preferably, a middle roller is further arranged between the first hemming wheel and the second hemming wheel, and a third ultrasonic welding head is arranged below the middle roller.

[0016] Preferably, surfaces of the middle roller, the first edge rolling wheel and the second edge rolling wheel are respectively provided with concave and convex patterns.

[0017] Preferably, the middle roller, the first edge rolling wheel and the second edge rolling wheel are respectively formed by assembling two semicircular rollers.

[0018] Preferably, the second ultrasonic welding head is driven by a first linear guide rail and a first lifting cylinder;

[0019] The third ultrasonic welding head is driven by the second linear guide rail and the second lifting cylinder.

[0020] Compared with the prior art, the technical effects of the utility model are as follows:

[0021] (1) The microporous membrane is relatively soft and cannot be flatly processed through the modification process and device. The composite material of the utility model uses a support membrane with pores as the support layer. Only the two edges of the microporous membrane are composited with the support membrane to form a composite area, and the other areas are non-composite areas. Driven by the support membrane, the modification is carried out flatly. After the modification is completed, the support layer is peeled off and restored to a single-layer microporous membrane, thereby realizing the reprocessing of soft microporous membranes without the need for clamps to clamp the two sides of the microporous membrane.

[0022] (2) The first rolling wheel and the first ultrasonic welding head cooperate to weld one side of the support membrane and the microporous membrane, while the second rolling wheel and the second ultrasonic welding head cooperate to weld the other side of the support membrane and the microporous membrane. Only the two edges of the microporous membrane form a composite area, and the other areas are non-composite areas, forming a composite microporous membrane, which provides a basis for the subsequent processing of the microporous membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic cross-sectional view of the composite microporous membrane of the utility model.

[0025] Figure 2 It is a top view schematic diagram of the composite microporous membrane of the utility model.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the microporous membrane composite device of the utility model.

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the microporous membrane composite device of the utility model.

[0028] Among them, 1. support film; 11. composite area; 12. non-composite area; 2. microporous membrane; 3. motor; 31. power output shaft; 32. belt; 4. rotating shaft; 41. first rolling wheel; 42. second rolling wheel; 43. support bearing; 44. middle roller; 5. first ultrasonic welding head; 51. lifting cylinder; 6. second ultrasonic welding head; 61. first linear guide; 62. first lifting cylinder; 7. third ultrasonic welding head; 71. second linear guide; 72. second lifting cylinder; 8. cooling fan. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] Example 1

[0032] See also Figure 1 and Figure 2 , this embodiment discloses a specific implementation of a composite microporous membrane.

[0033] Composite microporous membrane, see Figure 1 and Figure 2 , including a support membrane 1 and a microporous membrane 2 composited with the support membrane 1; there is a composite area 11 and a non-composite area 12 between the support membrane 1 and the microporous membrane 2, the composite area 11 is located at the two edges of the support membrane 1, and the area outside the composite area 11 is the non-composite area 12.

[0034] Specifically, the microporous membrane 2 is relatively soft, and the microporous membrane is a PTFE stretched membrane, an electrospinning membrane or a phase conversion membrane. If these microporous membranes need to be subsequently processed, such as modified, they cannot be post-processed flatly through a modifying liquid, etc. The composite material of this embodiment uses a support membrane 1 with pores as a support layer. For example, the support membrane 1 is a non-woven fabric or a porous mesh. Only the two edges of the microporous membrane 2 are composited with the support membrane 1 to form a composite area 11, and the other areas are non-composite areas 12; driven by the support membrane 1, the composite material has sufficient strength and stiffness to be modified flatly. After the modification is completed, the support layer is peeled off and restored to a single-layer microporous membrane, thereby realizing the reprocessing of soft microporous membranes without the need for clamps to clamp the two sides of the microporous membrane.

[0035] In a preferred embodiment, the width of the composite area 11 is 5mm-20mm, and the widths of the support membrane and the microporous membrane are both 300mm-1600mm; for microporous membranes with a larger width, local composite material can also be performed in the middle, that is, the composite area 11 is also located in the middle of the support membrane 1, forming a composite material with composite areas 11 on both sides and the middle, and other areas are non-composite areas 12.

[0036] When the composite material of the present embodiment is modified, since the supporting membrane has pores, the modifying liquid will penetrate through the pores to the lower surface of the microporous membrane 2, and the upper surface of the microporous membrane 2 will also directly contact the modifying liquid or the pores of the microporous membrane 2 transfer the modifying liquid from the lower surface of the microporous membrane 2 to the upper surface of the microporous membrane 2 through capillary action. This can achieve double-sided modification of the microporous membrane 2 without clamping on both sides, and the modification efficiency is high. After the modification is completed, the composite area 11 can be cut off and the supporting membrane 1 can be peeled off, and then rewound to form a microporous membrane.

[0037] Example 2

[0038] Ginseng Figure 3 and Figure 4 This embodiment discloses a specific implementation of a microporous membrane composite device.

[0039] Microporous membrane composite device, see Figure 3 and Figure 4 , including a rotating shaft 4 driven by a motor 3 and a first hemming wheel 41 and a second hemming wheel 42 installed on the rotating shaft 4; a first ultrasonic welding head 5 is arranged below the first hemming wheel 41, and a second ultrasonic welding head 6 is arranged below the second hemming wheel 42.

[0040] Specifically, see Figure 3 The motor 3 drives the belt 32 to rotate through the power output shaft 31, and the belt 32 drives the rotating shaft 4 to rotate, thereby driving the first rolling wheel 41 and the second rolling wheel 42 to rotate; since the span of the rotating shaft 4 is relatively large, in order to ensure the coaxiality of the rotating shaft 4 and reduce its jitter, support bearings 43 are respectively provided at both ends and the middle of the rotating shaft 4; in order to adapt to microporous membranes of different widths, the position of the second rolling wheel 42 is adjusted with the first rolling wheel 41 as the zero point reference to adapt to microporous membranes of different widths for ultrasonic compounding. In order to facilitate adjustment, the first rolling wheel 41 and the second rolling wheel 42 are respectively assembled by two semicircular rollers, and the two semicircular rollers are locked by screws And disassembly, disassembly or adjustment of position is convenient; to cooperate with the first rolling wheel 41 and the second rolling wheel 42, the horizontal position of the first ultrasonic welding head 5 remains unchanged, but the first ultrasonic welding head 5 can be driven by the lifting cylinder 51 and lifted vertically to move away from or close to the first rolling wheel 41, and the second ultrasonic welding head 6 is driven by the first linear guide 61 and the first lifting cylinder 62, wherein the first linear guide 61 changes the horizontal position of the second ultrasonic welding head 6 to adapt to microporous membranes of different widths, and the first lifting cylinder 62 changes the height position of the second ultrasonic welding head 6 to make the second ultrasonic welding head 6 away from or close to the second rolling wheel 42.

[0041] In order to adapt to the composite of microporous membranes with large widths and support membranes, such as the composite of microporous membranes with a width of 1000mm-1600mm, a middle roller 44 is further arranged between the first rolling wheel 41 and the second rolling wheel 42, and a third ultrasonic welding head 7 is arranged below the middle roller 44. The middle roller 44 is assembled from two semicircular rollers, which is also convenient for disassembly or adjustment of position to adapt to microporous membranes of different widths; in order to adapt to different widths, the third ultrasonic welding head 7 is driven by the second linear guide 71 and the second lifting cylinder 72. The second linear guide 71 changes the horizontal position of the third ultrasonic welding head 7 so that it cooperates with the middle roller 44 to adapt to microporous membranes of different widths. The second lifting cylinder 72 changes the height position of the third ultrasonic welding head 7 so that the third ultrasonic welding head 7 is away from or close to the middle roller 44.

[0042] Figure 1 and Figure 2 The composite area 11 on one side of the composite material is formed by ultrasonic welding between the first rolling wheel 41 and the first ultrasonic welding head 5, the composite area 11 on the other side of the composite material is formed by ultrasonic welding between the second rolling wheel 42 and the second ultrasonic welding head 6, and the middle composite area 11 is formed by ultrasonic welding between the middle roller 44 and the third ultrasonic welding head 7; in order to maintain the first ultrasonic welding head 5, the second ultrasonic welding head 6 and the third ultrasonic welding head 7 at a suitable temperature, a cooling fan 8 is arranged next to each welding head.

[0043] In order to improve the ultrasonic welding strength, the surfaces of the middle roller 44, the first hemming wheel 41 and the second hemming wheel 42 are respectively provided with concave-convex patterns. After the ultrasonic welding is completed, the composite area 11 will form concave-convex patterns, and the concave area will be more firmly composited.

[0044] Through this embodiment, the first rolling wheel 41 and the first ultrasonic welding head 5 cooperate to weld one edge of the support membrane 1 and the microporous membrane 2, and the second rolling wheel 42 and the second ultrasonic welding head 6 cooperate to weld the other edge of the support membrane 1 and the microporous membrane 2. The two edges of the microporous membrane 2 form a composite area 11. If necessary, the middle roller 44 and the third ultrasonic welding head 7 cooperate to weld the middle of the support membrane 1 and the microporous membrane 2 to form a composite area 11. The other area is a non-composite area 12, forming a composite microporous membrane, which provides a basis for the subsequent processing of the microporous membrane, so that the soft microporous membrane has a certain stiffness and strength under the support of the support membrane.

Claims

1. A composite microporous membrane, characterized in that: It includes a support membrane and a microporous membrane compounded on the support membrane; A composite area and a non-composite area are provided between the support membrane and the microporous membrane. The composite area is located at two edges of the support membrane, and the area outside the composite area is a non-composite area.

2. The composite microporous membrane according to claim 1, characterized in that The composite zone is also located in the middle of the support membrane.

3. The composite microporous membrane according to claim 1 or 2, characterized in that: The width of the composite zone is 5 mm to 20 mm.

4. The composite microporous membrane according to claim 1 or 2, characterized in that: The widths of the support film and the microporous film are both 300 mm-1600 mm.

5. The composite microporous membrane according to claim 1 or 2, characterized in that: The support membrane is a non-woven fabric or a porous mesh, and the microporous membrane is a PTFE stretched membrane, an electrostatic spinning membrane or a phase conversion membrane.

6. A microporous membrane composite device, characterized in that: It includes a rotating shaft driven by a motor and a first hemming wheel and a second hemming wheel mounted on the rotating shaft; A first ultrasonic welding head is arranged below the first hemming wheel, and a second ultrasonic welding head is arranged below the second hemming wheel.

7. The microporous membrane composite device according to claim 6, characterized in that: A middle roller is also arranged between the first hemming wheel and the second hemming wheel, and a third ultrasonic welding head is arranged below the middle roller.

8. The microporous membrane composite device according to claim 7, characterized in that: The surfaces of the middle roller, the first edge rolling wheel and the second edge rolling wheel are respectively provided with concave and convex patterns.

9. The microporous membrane composite device according to claim 7, characterized in that: The middle roller, the first edge rolling wheel and the second edge rolling wheel are respectively formed by assembling two semicircular rollers.

10. The microporous membrane composite device according to claim 7, characterized in that: The second ultrasonic welding head is driven by a first linear guide rail and a first lifting cylinder; The third ultrasonic welding head is driven by the second linear guide rail and the second lifting cylinder.

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