Novel PTFE composite film
By introducing a support body into the PTFE composite membrane and spraying a waterproof layer, the problem of easy deformation of the traditional PTFE composite membrane is solved, and efficient hydrophobic and breathable performance and enhanced filtration capacity are achieved.
Patent Information
- Application Number
- CN202422608379.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Traditional PTFE composite membranes are prone to deformation due to their single support, resulting in insufficient filtration efficiency and dust holding capacity.
The middle PTFE membrane is connected to the upper and lower support bodies by thermal bonding. The surface of the support body is sprayed with a waterproof layer. The support body is made of PP or PA non-woven fabric. The waterproof layer contains fluorine waterproofing agent and nano powder to improve the support effect and waterproof performance.
The supporting capacity of the membrane is enhanced, the dust holding capacity and filtration efficiency are improved, and a highly efficient hydrophobic and breathable effect is achieved.
Smart Images
Figure CN223337139U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PTFE membranes, in particular to a novel PTFE composite membrane. Background Art
[0002] PTFE filter material is mainly made of polytetrafluoroethylene (PTFE), and is usually hot-rolled with glass fiber, non-woven fabrics and other materials using special equipment. This can not only maintain the permeability of the filter material, but also improve the overall filtration efficiency. Therefore, it is often made into a PTFE composite membrane and installed in the infusion bottle as an air inlet membrane to effectively filter out tiny particles and pollutants, ensuring the purity of the liquid medicine inside the infusion set.
[0003] Traditional PTFE composite membranes are generally composed of a layer of PTFE membrane and a layer of PP non-woven fabric, with a relatively simple structure. Since the PTFE membrane is a soft membrane, a single PP non-woven fabric as a support body has limited support for the PTFE membrane and is prone to deformation during the process.
[0004] Therefore, it is necessary to design a new type of PTFE composite membrane to solve the problem. Utility Model Content
[0005] The utility model provides a novel PTFE composite membrane, which solves the above-mentioned technical problems.
[0006] In order to solve the above technical problems, the utility model provides a new PTFE composite membrane, including a middle PTFE membrane, the upper and lower layers of the middle PTFE membrane are respectively provided with support body one and support body two, the middle PTFE membrane is thermally bonded to support body one and support body two, and the outer surfaces of support body one and support body two are both provided with a waterproof layer.
[0007] Preferably, the support body 1 and the support body 2 are made of PP non-woven fabric or PA non-woven fabric.
[0008] Preferably, the waterproof layer is a fluorine-containing waterproof agent mixed with waterproof nanopowder and a surface roughening agent, and is evenly sprayed on the surfaces of the first support and the second support.
[0009] Preferably, the thickness of the middle PTFE membrane is between eight and twenty microns.
[0010] Compared with the related art, the novel PTFE composite membrane provided by the present invention has the following beneficial effects:
[0011] The utility model provides a PTFE composite membrane in which the middle PTFE membrane plays a supporting role through the upper and lower support bodies 1 and 2. The support bodies 1 and 2 can absorb more dust, which not only prevents the PTFE membrane from deforming but also improves the overall dust holding capacity. Moreover, a waterproof layer is provided on the support bodies 1 and 2, so that liquids or water vapor can be filtered. It is a highly efficient hydrophobic and breathable composite membrane. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the overall layer of a new type of PTFE composite membrane of the utility model;
[0013] Figure 2 This is a partial enlarged layer diagram of the support body of the present invention.
[0014] Numbers in the figure: 1, support body 1; 11, waterproof layer; 2, middle PTFE membrane; 3, support body 2. DETAILED DESCRIPTION
[0015] Example, by Figure 1-2 A new type of PTFE composite membrane is provided, including a middle PTFE membrane 2, wherein the upper and lower layers of the middle PTFE membrane 2 are respectively provided with a support body 1 and a support body 2 3, the middle PTFE membrane 2 is thermally bonded to the support body 1 and the support body 2 3, and the outer surfaces of the support body 1 and the support body 2 3 are both provided with a waterproof layer 11.
[0016] Specifically, the PTFE composite membrane can be used as an air inlet membrane and arranged in an infusion bottle for filtration. The middle PTFE membrane 2 plays a supporting role through the upper and lower support bodies 1 and 2 3. The support bodies 1 and 2 3 can absorb more dust, which not only prevents the PTFE membrane 2 from deforming, but also improves the overall dust holding capacity. Moreover, a waterproof layer 11 is provided on the support bodies 1 and 2 3, so that liquids or water vapor can be filtered. It is an efficient hydrophobic and breathable composite membrane.
[0017] In this embodiment, the support body 1 and the support body 2 3 are made of PP non-woven fabric or PA non-woven fabric, which can absorb dust or particulate impurities.
[0018] In this embodiment, the waterproof layer 11 is a fluorine-containing waterproof agent, and is mixed with waterproof nanopowder and surface roughening agent, and is evenly sprayed on the surface of support body 1 and support body 2 3. By using a fluorine-containing waterproof agent, including waterproof nanopowder and surface roughening agent sprayed on the surface of support body 1 and support body 2 3, the hydrophobic and breathable effects of the entire composite membrane can be achieved.
[0019] In this embodiment, the thickness of the middle PTFE membrane 2 is between eight and twenty microns, which is relatively thin, so that the air permeability is correspondingly improved, and bacteria can also be filtered.
[0020] Working principle:
[0021] The middle PTFE membrane 2 is thermally bonded to the support 1 and the support 2 3. The support 1, the support 2 3 and the middle PTFE membrane 2 are pressed together in batches by hot pressing. Before hot pressing, a waterproof layer 11 is sprayed on the surface of the support 1 and the support 2 3. That is, a fluorine-containing waterproof agent, including waterproof nanopowder and surface roughening agent, is sprayed on the surface of the support 1 and the support 2 3 to achieve the hydrophobic and breathable effect of the entire composite membrane. The thickness of the PTFE membrane traditionally set on the PP non-woven fabric is 40~50 microns, while In the present application, the thickness of the middle PTFE membrane 2 is between eight and twenty microns, which is relatively thin, so the air permeability is correspondingly improved, and bacteria can also be filtered. Moreover, the middle PTFE membrane 2 plays a supporting role through the upper and lower support bodies 1 and 2 3. Support body 1 and support body 2 3 can absorb more dust, which not only prevents the PTFE membrane 2 from deformation, but also improves the overall dust holding capacity. Moreover, a waterproof layer 11 is provided on support body 1 and support body 2 3, so that liquids or water vapor can be filtered. It is a highly efficient hydrophobic and breathable composite membrane.
Claims
1. A novel PTFE composite membrane, comprising a middle PTFE membrane (2), characterized in that: The upper and lower layers of the middle PTFE membrane (2) are respectively provided with a support body 1 (1) and a support body 2 (3); the middle PTFE membrane (2) is thermally bonded to the support body 1 (1) and the support body 2 (3); and the outer surfaces of the support body 1 (1) and the support body 2 (3) are both provided with a waterproof layer (11).
2. A novel PTFE composite membrane according to claim 1, characterized in that, The support body 1 (1) and the support body 2 (3) are made of PP non-woven fabric or PA non-woven fabric.
3. A novel PTFE composite membrane according to claim 1, characterized in that, The waterproof layer (11) is a fluorine-containing waterproof agent mixed with waterproof nano powder and a surface roughening agent, and is evenly sprayed on the surface of the support body 1 (1) and the support body 2 (3).
4. A novel PTFE composite membrane according to claim 1, characterized in that, The thickness of the middle PTFE membrane (2) is between eight and twenty microns.