CN211311787U - High waterproof high ventilative nanofiber membrane - Google Patents
High waterproof high ventilative nanofiber membrane Download PDFInfo
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Abstract
The utility model discloses a high waterproof high breathable nanofiber membrane, which comprises a PVB (polyvinyl butyral) electrospun membrane, a PVDF (polyvinylidene fluoride) electrospun membrane and a FPU (flexible flat panel unit) electrospun membrane; the PVB electrospun membrane, the PVDF electrospun membrane and the FPU electrospun membrane are laminated and compounded from inside to outside; the PVB electrospun membrane is formed by interweaving polyvinyl butyral nanofibers; the average diameter of the polyvinyl butyral nanofiber is 150-400 nm; the PVDF electrospun membrane is formed by interweaving polyvinylidene fluoride nano fibers; the average diameter of the polyvinylidene fluoride nano-fiber is 400-600 nm; the FPU electrospun membrane is formed by interweaving polyurethane nanofibers modified by fluorosilane; the diameter of the polyurethane nanofiber is 200-300 nm. The utility model discloses low in manufacturing cost, the high waterproof high ventilative nanofiber membrane intensity of preparation is high, and waterproof performance is good, and one-way air permeability is good.
Description
Technical Field
The utility model relates to a nanofiber membrane field especially relates to a high waterproof high ventilative nanofiber membrane.
Background
The waterproof breathable fabric means that water cannot permeate the fabric under certain pressure in the using process, and diffused liquid, particularly water vapor, can smoothly penetrate through the fabric. Fabrics with waterproof and breathable functions are widely used in daily life, such as tents, sleeping bags, outdoor clothing, shoes, down jackets and the like, and are increasingly emphasized in some special fields, such as military uniforms and the production of protective clothing in military affairs, and as protective materials for precision instruments and the like. Compared with the functions of keeping warm and keeping out cold of common fabrics, the waterproof and breathable material has the functions of water resistance, moisture permeability, ventilation, insulation, wind prevention, warm keeping and the like, and the realization of some functions is contradictory, and the functions of water resistance, moisture permeability and ventilation are mutually restricted.
At present, the existing waterproof breathable fabrics on the market mainly comprise: high density fabrics, coated fabrics and laminated fabrics. However, although the high-density fabric has good moisture permeability, the hydrostatic pressure resistance is poor; the coating fabric has excellent waterproof performance, but has the defects of poor flexibility and poor air permeability; although the laminated fabric has relatively excellent waterproof and air-permeable performance, the preparation process is complex and high in cost, and the application range of the laminated fabric is limited due to respective defects. The electrostatic spinning nanofiber membrane is a novel waterproof breathable material. The electrostatic spinning principle is that high-voltage static of thousands of volts is applied to polymer drops or melt, then charged drops deform under the action of electric field force and form a Tayer cone at a spinning nozzle, the continuous increase of the electric field force enables the drops to overcome the surface tension of the drops and finally to be ejected out of a cone tip to form jet flow, the jet flow is further stretched and refined in the motion process, meanwhile, solvent is volatilized to enable the jet flow to be solidified, nanometer-scale superfine fibers are formed, and the nanometer-scale superfine fibers fall on a receiver in a disordered non-woven fabric mode to form a nanometer fiber film. The electrostatic spinning is suitable for the research of waterproof and breathable performances, but is still in the starting stage, and compared with the traditional waterproof and breathable textiles, the electrostatic spinning still has some defects, so that a novel nanofiber membrane with high waterproof and high breathability is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a high waterproof high ventilative nanofiber membrane to the deficiency among the prior art, cooperates through the different nanofiber membrane of three-layer, on the basis of gaining in strength, optimizes its waterproof performance and promotes the wet air permeability of single-direction, has solved current nanofiber membrane intensity difference, and waterproof air permeability is unsatisfactory problem.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: a high waterproof and high breathable nanofiber membrane comprises a PVB electrospun membrane, a PVDF electrospun membrane and a FPU electrospun membrane; the PVB electrospun membrane, the PVDF electrospun membrane and the FPU electrospun membrane are laminated and compounded from inside to outside; the PVB electrospun membrane is formed by interweaving polyvinyl butyral nanofibers; the average diameter of the polyvinyl butyral nanofiber is 150-400 nm; the PVDF electrospun membrane is formed by interweaving polyvinylidene fluoride nano fibers; the average diameter of the polyvinylidene fluoride nano-fiber is 400-600 nm; the FPU electrospun membrane is formed by interweaving polyurethane nanofibers modified by fluorosilane; the diameter of the polyurethane nanofiber is 200-300 nm.
As a preferred scheme of the utility model, the thickness of PVB electricity spinning membrane is 0.010-0.025 mm.
As a preferred scheme of the utility model, the thickness ratio of the PVB electrospun membrane to the FPU electrospun membrane is 1 (1.2-1.6).
As an optimized scheme of the utility model, FPU electrospun membrane surface coating has the silica nanometer coating, can further improve FPU electrospun membrane surface's wear resistance, improves FPU electrospun membrane's hydrophobic property.
The preparation method of the high-waterproof high-air-permeability nanofiber membrane comprises the following steps:
step 1, preparing a PVB electrospun membrane; weighing PVB powder with a certain mass, adding absolute ethyl alcohol to prepare PVB spinning solution with the mass fraction of 6-8%, and fully stirring through a magnetic stirrer to fully dissolve the PVB powder; then spinning through an electrostatic spinning device to prepare a PVB electro-spinning membrane, injecting PVB spinning solution into a needle tube for electrostatic spinning, and taking an aluminum foil as a base material under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 12-25kV, the receiving distance is 13-16cm, the spinning speed is 0.5-1mL/h, and the thickness of the PVB electrospun membrane is controlled to be 0.010-0.025 mm;
step 2, compounding a PVDF (polyvinylidene fluoride) electrospun membrane on the surface of the PVB electrospun membrane; weighing a certain amount of PVDF powder, dissolving the PVDF powder into a mixed solvent with the volume ratio of DMF to acetone being 6/4, heating the mixed solvent in a water bath at 40 ℃, and fully stirring the mixed solvent by a magnetic stirrer to fully dissolve the PVDF powder, so as to prepare a PVDF spinning solution with the mass fraction of 13-16%; continuously spinning the surface of the PVB electrospun membrane by using an electrostatic spinning device under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 15-18kV, the receiving distance is 15-20cm, the spinning speed is 0.5-1mL/h, and the thickness of the PVDF electrospun membrane is kept at 0.010-0.040 mu m;
step 4, carrying out heat treatment on the composite fiber membrane; and (3) carrying out heat treatment on the two surfaces of the composite fiber membrane by using hot air at the temperature of 130-140 ℃, wherein the heating time is 5-15 min.
As the optimization of the preparation method, the preparation method also comprises the step 5 of preheating the surface of the FPU electrospun membrane to 40 ℃, uniformly blade-coating an acetone solution with the silicon dioxide nano-particle concentration of 0.1-0.2 wt% on the surface of the FPU electrospun membrane, drying for 10 minutes in vacuum at the temperature of 110 ℃, and repeatedly blade-coating and drying for 3 times.
The PVB electrospun membrane is a polyvinyl butyral electrospun membrane, the PVDF electrospun membrane is a polyvinylidene fluoride electrospun membrane, and the FPU electrospun membrane is a fluorinated polyurethane electrospun membrane.
Through the technical scheme, the utility model discloses technical scheme's beneficial effect is: the utility model discloses low in manufacturing cost can be applicable to the industrial batch production, and the high waterproof high ventilative nanofiber membrane stable performance of preparation, the yield is high, has improved the application defect of nanofiber membrane in waterproof ventilative field, does benefit to popularization and application. The utility model discloses a high waterproof high ventilative nanofiber membrane has improved the poor problem of current individual layer nanofiber membrane intensity, and PVDF electricity spins the membrane and spins the membrane complex with FPU electricity, can effectively improve anti tear strength, and PVB electricity spins the membrane and can improve the pliability that FPU electricity spins the membrane, and through sandwich composite structure, breaking strength is more than 5MPa, and the elongation is at 35-45%; the utility model discloses FPU electricity spins membrane place face and has good waterproof performance, and resistant hydrostatic pressure value reaches 100KPa, and PVB electricity spins membrane place face and has good air permeability, and the moisture permeability is 10.1kgm-2d-1. The FPU electro-spinning membrane of the utility model is waterproof, the fiber structure of the FPU electro-spinning membrane is uniform and fine, a porous structure with uniform aperture is formed after interweaving, the average aperture of the FPU electro-spinning membrane is small,meanwhile, the FPU electrospun membrane has good hydrophobic property, and forms lotus effect by hydrophobic modification through fluorosilane, so that the FPU electrospun membrane has high waterproof property; the PVB electrospun membrane is positioned on the breathable surface, the utility model ensures good breathability through the adsorption-diffusion effect and the capillary-diffusion effect, and water vapor is adsorbed by the PVB electrospun membrane and then diffused to the side with low humidity from the side with high humidity due to the hydrophilicity of the PVB electrospun membrane and the good hydrophobicity of the PVDF electrospun membrane and the FPU electrospun membrane, so that unidirectional moisture conduction is realized; meanwhile, the average pore diameter among fibers and among fibers of the PVDF electrospun membrane is larger than that of the FPU electrospun membrane, and water vapor moves to the side of the FPU electrospun membrane due to pressure difference and then diffuses to the outer side of the FPU electrospun membrane, so that unidirectional moisture conduction and ventilation are realized. In addition, the PVB electrospun membrane has good flexibility and comfortable touch feeling and is suitable for wearing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
The corresponding part names indicated by the numbers and letters in the drawings:
PVB electrospun membrane 2 PVDF electrospun membrane 3 FPU electrospun membrane.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
A highly waterproof and highly breathable nanofiber membrane adopts a three-layer composite sandwich structure and comprises a PVB (polyvinyl butyral) electrospun membrane 1, a PVDF (polyvinylidene fluoride) electrospun membrane 2 and a FPU (flexible flat polyurethane) electrospun membrane 3 which are sequentially laminated and compounded from inside to outside. The PVB electrospun membrane 1 is formed by interweaving polyvinyl butyral nanofibers. The PVDF electrospun membrane 2 is formed by interweaving polyvinylidene fluoride nano fibers. The FPU electrospun membrane 3 is formed by interweaving polyurethane nano-fibers modified by fluorosilane.
The preparation method of the high-waterproof high-breathability nanofiber membrane comprises the following steps:
step 1, preparing a PVB electrospun membrane 1; weighing PVB powder with a certain mass, adding absolute ethyl alcohol to prepare PVB spinning solution with the mass fraction of 6-8%, and fully stirring through a magnetic stirrer to fully dissolve the PVB powder; then spinning through an electrostatic spinning device to prepare a PVB electrospun membrane 1, injecting PVB spinning solution into a needle tube for electrostatic spinning, and taking an aluminum foil as a base material under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 12kV, the receiving distance is 13cm, the spinning speed is 0.5mL/h, and the thickness of the PVB electrospun membrane 1 is controlled to be 0.010 mm.
Step 2, compounding a PVDF electrospun membrane 2 on the surface of the PVB electrospun membrane 1; weighing a certain amount of PVDF powder, dissolving the PVDF powder into a mixed solvent with the volume ratio of DMF to acetone being 6/4, heating the mixed solvent in a water bath at 40 ℃, and fully stirring the mixed solvent by a magnetic stirrer to fully dissolve the PVDF powder, so as to prepare a PVDF spinning solution with the mass fraction of 13-16%; continuously spinning the surface of the PVB electrospun membrane 1 by using an electrostatic spinning device under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 15kV, the receiving distance is 15cm, the spinning speed is 0.5mL/h, and the thickness of the PVDF electrospun membrane 2 is kept at 0.010 mu m.
Step 4, carrying out heat treatment on the composite fiber membrane; and (3) carrying out heat treatment on the two surfaces of the composite fiber membrane by using hot air at the temperature of 130-140 ℃, wherein the heating time is 5-15 min.
The breaking strength of the prepared high-waterproof high-permeability nanofiber membrane is more than 5.58MPa, and the elongation is 42.66%; the utility model discloses FPU electrospun membrane 3 face resistant hydrostatic pressure value reaches 108KPa, and PVB electrospun membrane 1 face moisture permeability is 11.6kgm-2d-1。
Example 2
A highly waterproof and highly breathable nanofiber membrane adopts a three-layer composite sandwich structure and comprises a PVB (polyvinyl butyral) electrospun membrane 1, a PVDF (polyvinylidene fluoride) electrospun membrane 2 and a FPU (flexible flat polyurethane) electrospun membrane 3 which are sequentially laminated and compounded from inside to outside. The PVB electrospun membrane 1 is formed by interweaving polyvinyl butyral nanofibers. The PVDF electrospun membrane 2 is formed by interweaving polyvinylidene fluoride nano fibers. The FPU electrospun membrane 3 is formed by interweaving polyurethane nano-fibers modified by fluorosilane.
The preparation method of the high-waterproof high-breathability nanofiber membrane comprises the following steps:
step 1, preparing a PVB electrospun membrane 1; weighing PVB powder with a certain mass, adding absolute ethyl alcohol to prepare PVB spinning solution with the mass fraction of 6-8%, and fully stirring through a magnetic stirrer to fully dissolve the PVB powder; then spinning through an electrostatic spinning device to prepare a PVB electrospun membrane 1, injecting PVB spinning solution into a needle tube for electrostatic spinning, and taking an aluminum foil as a base material under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 25kV, the receiving distance is 16cm, the spinning speed is 1mL/h, and the thickness of the PVB electrospun membrane 1 is controlled to be 0.025 mm.
Step 2, compounding a PVDF electrospun membrane 2 on the surface of the PVB electrospun membrane 1; weighing a certain amount of PVDF powder, dissolving the PVDF powder into a mixed solvent with the volume ratio of DMF to acetone being 6/4, heating the mixed solvent in a water bath at 40 ℃, and fully stirring the mixed solvent by a magnetic stirrer to fully dissolve the PVDF powder, so as to prepare a PVDF spinning solution with the mass fraction of 13-16%; continuously spinning the surface of the PVB electrospun membrane 1 by using an electrostatic spinning device under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 18kV, the receiving distance is 25cm, the spinning speed is 1mL/h, and the thickness of the PVDF electrospun membrane 2 is kept at 0.040 mu m.
Step 4, carrying out heat treatment on the composite fiber membrane; and (3) carrying out heat treatment on the two surfaces of the composite fiber membrane by using hot air at the temperature of 130-140 ℃, wherein the heating time is 5-15 min.
The breaking strength of the prepared high-waterproof high-permeability nanofiber membrane is more than 8.96MPa, and the elongation is 40.35%; the utility model discloses FPU electrospun membrane 3 face resistant hydrostatic pressure value reaches 126KPa, and PVB electrospun membrane 1 face moisture permeability is 10.2kgm-2d-1。
Example 3
A highly waterproof and highly breathable nanofiber membrane adopts a three-layer composite sandwich structure and comprises a PVB (polyvinyl butyral) electrospun membrane 1, a PVDF (polyvinylidene fluoride) electrospun membrane 2 and a FPU (flexible flat polyurethane) electrospun membrane 3 which are sequentially laminated and compounded from inside to outside. The PVB electrospun membrane 1 is formed by interweaving polyvinyl butyral nanofibers. The PVDF electrospun membrane 2 is formed by interweaving polyvinylidene fluoride nano fibers. The FPU electrospun membrane 3 is formed by interweaving polyurethane nano-fibers modified by fluorosilane. In order to ensure that the three are matched with each other better, the thickness of the PVB electrospun membrane 1 is 0.010-0.025 mm. The thickness ratio of the PVB electrospun membrane 1 to the FPU electrospun membrane 3 is 1 (1.2-1.6). In order to improve the wear resistance of the surface of the FPU electrospun membrane 3 and improve the hydrophobic property of the FPU electrospun membrane 3, the surface of the FPU electrospun membrane 3 is coated with a silica nano coating.
The preparation method of the high-waterproof high-breathability nanofiber membrane comprises the following steps:
step 1, preparing a PVB electrospun membrane 1; weighing PVB powder with a certain mass, adding absolute ethyl alcohol to prepare PVB spinning solution with the mass fraction of 7%, and fully stirring through a magnetic stirrer to fully dissolve the PVB powder; then spinning through an electrostatic spinning device to prepare a PVB electrospun membrane 1, injecting PVB spinning solution into a needle tube for electrostatic spinning, and taking an aluminum foil as a base material under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 15kV, the receiving distance is 15cm, the spinning speed is 0.6mL/h, and the thickness of the PVB electrospun membrane 1 is controlled to be 0.015 mm.
Step 2, compounding a PVDF electrospun membrane 2 on the surface of the PVB electrospun membrane 1; weighing a certain amount of PVDF powder, dissolving the PVDF powder into a mixed solvent with the volume ratio of DMF to acetone being 6/4, heating the mixed solvent in a water bath at 40 ℃, and fully stirring the mixed solvent by a magnetic stirrer to fully dissolve the PVDF powder, so as to prepare a PVDF spinning solution with the mass fraction of 15%; continuously spinning the surface of the PVB electrospun membrane 1 by using an electrostatic spinning device under the spinning condition that the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 17kV, the receiving distance is 16cm, the spinning speed is 0.8mL/h, and the thickness of the PVDF electrospun membrane 2 is kept between 0.010 and 0.040 mu m.
Step 3, compounding an FPU (flat surface unit) electrospun membrane 3 on the surface of the PVDF electrospun membrane 2; weighing a certain amount of PU particles, adding the PU particles into a DMF solvent in which NaCl is dissolved, and fully stirring the mixture by a magnetic stirrer to fully dissolve the PU particles to prepare a PU spinning solution with the mass fraction of 16%, wherein the mass fraction of NaCl in the PU spinning solution is 0.01%; continuously spinning the surface of the PVDF electrospun membrane 2 by using an electrostatic spinning device, wherein the spinning conditions are as follows: the temperature is 25 +/-3 ℃; the humidity is 40 +/-5%, the spinning voltage is 17kV, the receiving distance is 16cm, the spinning speed is 0.8mL/h, and the PU electrospun membrane is prepared; activating the surface of the PU electrospun membrane by using a plasma instrument, wherein the activation treatment power is controlled at 100W, the pressure is controlled at 20Pa and the treatment time is 1-3min under the helium environment; and then coating a methanol solution with the FAS concentration of 1 wt% on the surface of the PU electrospun membrane once every 30min for 20-30 times in total, and then carrying out vacuum drying at the drying temperature of 60-75 ℃ for 16-20h to form an FPU electrospun membrane 3 on the surface of the PVDF electrospun membrane 2, thus obtaining the composite fiber membrane.
Step 4, carrying out heat treatment on the composite fiber membrane; and (3) carrying out heat treatment on the two surfaces of the composite fiber membrane by using hot air at the temperature of 130-140 ℃, wherein the heating time is 5-15 min.
And 5, preheating the surface of the FPU electrospun membrane 3 to 40 ℃, uniformly blade-coating an acetone solution with the silicon dioxide nanoparticle concentration of 0.1-0.2 wt% on the surface of the FPU electrospun membrane 3, drying for 10 minutes in vacuum at the temperature of 110 ℃, and repeatedly blade-coating and drying for 3 times.
The breaking strength of the prepared high-waterproof high-permeability nanofiber membrane is more than 8.54MPa, and the elongation is 42.15%; the utility model discloses FPU electrospun membrane 3 face resistant hydrostatic pressure value reaches 132KPa, and PVB electrospun membrane 1 face moisture permeability is 10.8kgm-2d-1。
Through the above-mentioned specific embodiment, the beneficial effects of the utility model are that: the utility model discloses production simple process is reasonable, and low in manufacturing cost can be applicable to the industrial batch production, and the high waterproof high ventilative nanofiber membrane stable performance of preparation, the yield is high, has improved the application defect of nanofiber membrane in waterproof ventilative field, does benefit to popularization and application. The utility model discloses a high waterproof high ventilative nanofiber membrane has improved the poor problem of current individual layer nanofiber membrane intensity, and PVDF electricity is electrospun membrane 2 and is electrospun membrane 3 complex with FPU, can effectively improve anti tear strength, and PVB electricity is electrospun membrane 1 and can improve the pliability that FPU electricity was electrospun membrane 3, through three pliabilityThe Mingzhi composite structure has the breaking strength of more than 5MPa and the elongation of 35-45 percent; the utility model discloses FPU electricity spins 3 place faces of membrane and has good waterproof performance, and resistant hydrostatic pressure value reaches 100KPa, and PVB electricity spins 1 place faces of membrane and has good air permeability, and the moisture permeability is 10.1kgm-2d-1. The FPU electrospinning membrane 3 of the utility model is waterproof, the fiber structure of the FPU electrospinning membrane 3 is uniform and fine, a porous structure with uniform pore diameter is formed after interweaving, the average pore diameter of the FPU electrospinning membrane 3 is small, meanwhile, the FPU electrospinning membrane 3 has good hydrophobic property, hydrophobic modification is carried out through fluorosilane, lotus leaf effect is formed, and the FPU electrospinning membrane 3 has high waterproof property; the PVB electrospun membrane 1 is located on the breathable surface, the utility model ensures good breathability through the adsorption-diffusion effect and the capillary-diffusion effect, and because the PVB electrospun membrane 1 has hydrophilicity, the PVDF electrospun membrane 2 and the FPU electrospun membrane 3 have good hydrophobicity, water vapor is adsorbed by the PVB electrospun membrane 1 and then diffuses from the high-humidity side to the low-humidity side, so that one-way moisture conduction is realized; meanwhile, the average pore diameter among fibers and among fibers of the PVDF electrospun membrane 2 is larger than that of the FPU electrospun membrane 3, and water vapor moves to the side of the FPU electrospun membrane 3 due to pressure difference and then diffuses to the outer side of the FPU electrospun membrane 3, so that unidirectional moisture conduction and air permeation are realized. In addition, the PVB electrospun membrane 1 has good flexibility and comfortable touch feeling and is suitable for wearing.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The high-waterproof high-air-permeability nanofiber membrane is characterized by comprising a PVB (polyvinyl butyral) electrospun membrane, a PVDF (polyvinylidene fluoride) electrospun membrane and a FPU (polytetrafluoroethylene) electrospun membrane; the PVB electrospun membrane, the PVDF electrospun membrane and the FPU electrospun membrane are laminated and compounded from inside to outside; the PVB electrospun membrane is formed by interweaving polyvinyl butyral nanofibers; the average diameter of the polyvinyl butyral nanofiber is 150-400 nm; the PVDF electrospun membrane is formed by interweaving polyvinylidene fluoride nano fibers; the average diameter of the polyvinylidene fluoride nano-fiber is 400-600 nm; the FPU electrospun membrane is formed by interweaving polyurethane nanofibers modified by fluorosilane; the diameter of the polyurethane nanofiber is 200-300 nm.
2. The nanofiber membrane with high water resistance and high air permeability as claimed in claim 1, wherein the thickness of the PVB electrospun membrane is 0.010-0.025 mm.
3. The highly waterproof and highly breathable nanofiber membrane as claimed in claim 1, wherein the thickness ratio of the PVB electrospun membrane to the FPU electrospun membrane is 1 (1.2-1.6).
4. The highly waterproof highly breathable nanofiber membrane as claimed in claim 3, wherein the FPU electrospun membrane is coated with a silica nanocoating on its surface.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258021A (en) * | 2019-07-04 | 2019-09-20 | 吴江三丰户外纺织面料有限公司 | A kind of high waterproof height is breathed freely nano fibrous membrane and preparation method thereof |
| CN114351358A (en) * | 2022-01-13 | 2022-04-15 | 四川大学 | ePTFE-TPU composite membrane and preparation method thereof |
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2019
- 2019-07-04 CN CN201921031568.4U patent/CN211311787U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258021A (en) * | 2019-07-04 | 2019-09-20 | 吴江三丰户外纺织面料有限公司 | A kind of high waterproof height is breathed freely nano fibrous membrane and preparation method thereof |
| CN110258021B (en) * | 2019-07-04 | 2024-02-06 | 江苏三丰特种材料科技有限公司 | High-waterproof high-air-permeability nanofiber membrane and preparation method thereof |
| CN114351358A (en) * | 2022-01-13 | 2022-04-15 | 四川大学 | ePTFE-TPU composite membrane and preparation method thereof |
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