Filtering membrane containing ptfe

Abstract

The utility model discloses a filtering membrane containing ptfe, which comprises a mask body, a nose bridge support and ear hooks, the nose bridge support and the ear hooks are arranged on the mask body, and the mask body comprises an outer spunbond layer, a first protective layer, a ptfe layer, a second protective layer and an inner spunbond layer which are sequentially arranged from outside to inside. The first protective layer and the second protective layer are attached to the ptfe layer, and the toughness of the first protective layer and the second protective layer is larger than that of the ptfe layer. The filtering membrane containing the ptfe is reasonable in structure, the protective layers which are attached to each other are arranged on the inner surface and the outer surface of the ptfe layer, the toughness of the ptfe layer is enhanced, the service life of the ptfe layer is prolonged, and therefore the service life of a mask is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of filter membranes, in particular to a filter membrane containing PTFE. Background Art

[0002] PTFE membrane uses polytetrafluoroethylene (PTFE) as the filter material, which can filter out PM2.5 and other tiny particles while maintaining good air permeability; therefore, PTFE membrane is often used in N95 masks;

[0003] Traditional masks use melt-blown PP film as the lining. The effective protection period of melt-blown PP film is short, and the electret will be affected after washing, making it impossible to reuse.

[0004] The PTFE membrane can maintain protection for a longer period of time. The traditional PTFE membrane mask adopts a double-layer non-woven fabric with an internal PTFE membrane. The PTFE membrane and the non-woven fabrics on both sides are non-adhesive. However, the PTFE membrane in the PTFE mask has a high degree of crystallinity and the molecular chains are tightly arranged. After the PTFE membrane is impacted, the molecular chain segments have no room for movement and the impact strength is low. Therefore, the PTFE membrane has poor flexibility and is easy to break. Long-term use will lead to a decrease in the filtration efficiency of the mask and a short service life of the mask.

[0005] Therefore, it is necessary to improve the filter membrane containing ptfe in the prior art. Utility Model Content

[0006] The utility model aims to overcome the defects in the prior art and provide a filter membrane containing PTFE, wherein a matching protective layer is arranged on the inner and outer surfaces of the PTFE layer to enhance the toughness of the PTFE layer and prolong the service life of the PTFE layer.

[0007] In order to achieve the above-mentioned technical effects, the technical solution of the utility model is: a filter membrane containing PTFE, comprising an outer spunbond layer, a first protective layer, a PTFE layer, a second protective layer and an inner spunbond layer arranged in sequence from the outside to the inside, the first protective layer and the second protective layer are arranged in contact with the PTFE layer, and the toughness of the first protective layer and the second protective layer is greater than the toughness of the PTFE layer.

[0008] A preferred technical solution is that both the first protective layer and the second protective layer are melt-blown layers, and the PTFE layer is compositely connected to the melt-blown layer.

[0009] The preferred technical solution is that it also includes a main breathing part located in the middle and a friction fitting part located at the outer edge, and the density of the friction fitting part of the meltblown layer is greater than the density of the main breathing part of the meltblown layer.

[0010] The preferred technical solution is to further include a secondary breathing portion located between the main breathing portion and the friction contact portion, wherein the density of the secondary breathing portion of the meltblown layer is greater than the density of the main breathing portion of the meltblown layer and less than the density of the friction contact portion of the meltblown layer.

[0011] A preferred technical solution is that the density of the nose bridge supporting part of the meltblown layer is greater than the density of the main breathing part of the meltblown layer.

[0012] A preferred technical solution is that the density of the nose bridge supporting part of the meltblown layer is greater than the density of the secondary breathing part of the meltblown layer.

[0013] A preferred technical solution is to further include an antibacterial layer, wherein the antibacterial layer is arranged between the second protective layer and the inner spunbond layer.

[0014] A preferred technical solution is that the antibacterial layer is a nanosilver layer, and the periphery of the nanosilver layer is fixedly connected to the peripheries of the second protective layer and the inner spunbond layer.

[0015] The preferred technical solution is that the thickness of the outer spunbond layer is 0.15-0.2 mm, the thickness of the first protective layer is 0.1-0.2 mm, the thickness of the ptfe layer is 0.03-0.05 mm, the thickness of the second protective layer is 0.1-0.2 mm, and the thickness of the inner spunbond layer is 0.15-0.2 mm.

[0016] The advantages and beneficial effects of the utility model are that the filter membrane containing PTFE of the utility model has a reasonable structure. By arranging the first protective layer and the second protective layer on the inner and outer surfaces of the PTFE layer, and the toughness of the first protective layer and the second protective layer is greater than the toughness of the PTFE layer, the purpose of enhancing the toughness of the PTFE layer is achieved and the service life of the PTFE layer is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an embodiment of a filter membrane containing PTFE of the utility model;

[0018] Figure 2 It is a schematic diagram of the layered structure of the mask body;

[0019] In the figure: 1. Mask body; 11. Nose bridge support; 12. Ear hooks; 2. Outer spunbond layer; 3. First protective layer; 4. PTFE layer; 5. Second protective layer; 6. Inner spunbond layer; 7. Main breathing part; 8. Friction fitting part; 9. Secondary breathing part; 10. Antibacterial layer. DETAILED DESCRIPTION

[0020] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] Example

[0022] like Figure 1-2 As shown, the filter membrane containing PTFE in the embodiment includes an outer spunbond layer 2, a first protective layer 3, a PTFE layer 4, a second protective layer 5 and an inner spunbond layer 6 which are arranged in sequence from the outside to the inside. The first protective layer 3 and the second protective layer 5 are arranged in contact with the PTFE layer 4, and the toughness of the first protective layer 3 and the second protective layer 5 is greater than the toughness of the PTFE layer 4.

[0023] Through such a design, the first protective layer 3 and the second protective layer 5 are respectively arranged on the inner and outer surfaces of the PTFE layer 4 , so as to improve the toughness of the PTFE layer 4 and thus improve the service life of the PTFE layer 4 .

[0024] Specifically, the first protective layer 3 and the second protective layer 5 are both melt-blown layers, and the PTFE layer 4 is compositely connected to the melt-blown layers.

[0025] Through such a design, the connection between the pfte layer and the protection layer is achieved.

[0026] Furthermore, it also includes a main breathing portion 7 located in the middle and a friction fitting portion 8 located at the outer edge, and the density of the friction fitting portion 8 of the meltblown layer is greater than the density of the main breathing portion 7 of the meltblown layer.

[0027] Through such a design, the density of the main breathing part 7 of the meltblown layer is reduced, and the toughness of the PTFE layer 4 is ensured while the permeability of the mask is not too low.

[0028] Furthermore, it also includes a secondary breathing part 9 located between the main breathing part 7 and the friction contact part 8, and the density of the secondary breathing part 9 of the meltblown layer is greater than the density of the main breathing part 7 of the meltblown layer and less than the density of the friction contact part 8 of the meltblown layer.

[0029] Through such a design, the density of the meltblown layer breathing part 9 is higher than the density of the main breathing part 7, ensuring the toughness of the PTFE layer 4 in the secondary breathing part 9.

[0030] Specifically, the density of the nose bridge support portion of the meltblown layer is greater than the density of the main breathing portion 7 of the meltblown layer.

[0031] Through such a design, the nose bridge support part of the PTFE membrane 4 is protected.

[0032] Specifically, the density of the nose bridge support portion of the meltblown layer is greater than the density of the secondary breathing portion 9 of the meltblown layer.

[0033] Furthermore, an antibacterial layer 10 is included, and the antibacterial layer 10 is arranged between the second protective layer 5 and the inner spunbond layer 6 .

[0034] Through such a design, the antibacterial effect of the mask body 1 is improved.

[0035] Specifically, the antibacterial layer 10 is a nanosilver layer, and the periphery of the nanosilver layer is fixedly connected to the peripheries of the second protective layer 5 and the inner spunbond layer 6 .

[0036] Specifically, the thickness of the outer spunbond layer 2 is 0.18 mm, the thickness of the first protective layer 3 is 0.15 mm, the thickness of the ptfe layer 4 is 0.04 mm, the thickness of the second protective layer 5 is 0.15 mm, and the thickness of the inner spunbond layer 6 is 0.18 mm.

[0037] In another specific embodiment, a mask containing a PTFE filter membrane includes a mask body 1 and a nose bridge support 11 and an ear hook 12 arranged on the mask body 1, and the mask body includes a PTFE filter membrane.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A filter membrane containing PTFE, characterized in that, The invention comprises an outer spunbond layer (2), a first protective layer (3), a PTFE layer (4), a second protective layer (5) and an inner spunbond layer (6) which are arranged in sequence from the outside to the inside; the first protective layer (3) and the second protective layer (5) are arranged in contact with the PTFE layer (4); and the toughness of the first protective layer (3) and the second protective layer (5) is greater than the toughness of the PTFE layer (4).

2. The PTFE-containing filter membrane according to claim 1, characterized in that The first protective layer (3) and the second protective layer (5) are both melt-blown layers, and the PTFE layer (4) is compositely connected to the melt-blown layer.

3. The PTFE-containing filter membrane according to claim 2, characterized in that: It also includes a main breathing portion (7) and a friction fitting portion (8) located at the outer edge of the main breathing portion (7), and the density of the friction fitting portion (8) of the meltblown layer is greater than the density of the main breathing portion (7) of the meltblown layer.

4. The PTFE-containing filter membrane according to claim 3, characterized in that: The invention also comprises a secondary breathing portion (9) located between the main breathing portion (7) and the friction contact portion (8), wherein the density of the secondary breathing portion (9) of the meltblown layer is greater than the density of the main breathing portion (7) of the meltblown layer and is less than the density of the friction contact portion (8) of the meltblown layer.

5. The PTFE-containing filter membrane according to claim 4, characterized in that: The density of the nose bridge support part of the meltblown layer is greater than the density of the main breathing part (7) of the meltblown layer.

6. The PTFE-containing filter membrane according to claim 5, characterized in that: The density of the nose bridge support part of the meltblown layer is greater than the density of the secondary breathing part (9) of the meltblown layer.

7. The PTFE-containing filter membrane according to claim 1, characterized in that: It also comprises an antibacterial layer (10), wherein the antibacterial layer (10) is arranged between the second protective layer (5) and the inner spunbond layer (6).

8. The PTFE-containing filter membrane according to claim 7, characterized in that: The antibacterial layer (10) is a nanosilver layer, the periphery of which is fixedly connected to the periphery of the second protective layer (5) and the inner spunbond layer (6).

9. The PTFE-containing filter membrane according to claim 1, characterized in that: The thickness of the outer spunbond layer (2) is 0.15-0.2 mm, the thickness of the first protective layer (3) is 0.1-0.2 mm, the thickness of the ptfe layer (4) is 0.03-0.05 mm, the thickness of the second protective layer (5) is 0.1-0.2 mm, and the thickness of the inner spunbond layer (6) is 0.15-0.2 mm.

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