CN216514483U - Wet film, humidifier and air treatment device - Google Patents

Abstract

The utility model provides a wet film, a humidifier and an air treatment device. According to the technical scheme, the non-woven fabric material is adopted as the base material of the wet film material to be compounded with the electrostatic spinning nanofiber film, and the cellulose acetate nanofiber forms a hydrophilic layer/nanofiber film with super-hydrophilic performance, so that the water absorption speed is obviously improved; in addition, the water absorption performance of the non-woven fabric is effectively improved by means of the water absorption capacity of the super-hydrophilic layer/nanofiber membrane.

Description

Wet film, humidifier and air treatment device

Technical Field

The utility model relates to the technical field of materials, in particular to a wet film, a humidifier 20 and an air treatment device.

Background

The common wet film material in the current market is mainly PET/viscose blended spunlace nonwoven fabric, is applied to a downdraft wet film humidifier, and is distributed by utilizing the water absorption performance of the material. Wherein, the viscose fiber is used as a water absorbing component, and the PET fiber is used as a supporting component.

However, the current wet film has uneven moisture distribution, the upper part of the wet film cannot absorb moisture, the humidifying performance is more dependent on the water absorption performance of the wet film material, the water absorption height is low, the water absorption speed is slow, and the humidifying performance is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wet film, and aims to solve the problem of poor humidifying performance of the wet film in the prior art.

In order to solve the above problems, the present invention provides a wet film comprising:

a non-woven fabric;

a cellulose acetate nanofiber layer disposed in a stack with the nonwoven layer.

In one embodiment, the non-woven fabric is prepared by blending PET fibers and viscose fibers.

In one embodiment, the cellulose acetate nanofiber layer is formed on the surface of the nonwoven fabric by an electrospinning process.

In one embodiment, the cellulose acetate nanofiber layer has a fiber diameter of 0.4 μm to 0.8 μm.

In one embodiment, the wet film has a thickness of 0.01mm to 0.04 mm.

In one embodiment, the wet film is arranged in a zigzag shape.

In one embodiment, the wet film has a tooth height of 20mm to 40 mm.

In one embodiment, the interdental space of the wet film is 3mm to 8 mm.

The utility model also provides a humidifier, which comprises a bracket and a wet film, wherein the wet film comprises non-woven fabric and a cellulose acetate nanofiber layer, and the cellulose acetate nanofiber layer and the non-woven fabric layer are stacked; the wet film is mounted on the bracket.

The utility model further provides an air treatment device, which comprises a humidifier, wherein the humidifier comprises a bracket and a wet film, the wet film comprises a non-woven fabric and a cellulose acetate nanofiber layer, and the cellulose acetate nanofiber layer is arranged on one side surface of the non-woven fabric; the wet film is mounted on the bracket.

According to the technical scheme, the non-woven fabric material is adopted as the base material of the wet film material to be compounded with the electrostatic spinning nanofiber film, and based on the fact that the cellulose acetate nanofiber has good hydrophilic performance, a hydrophilic layer/nanofiber film with super-hydrophilic performance is formed by the cellulose acetate nanofiber and a treating agent microfibrillated cellulose, so that the water absorption speed is obviously improved; in addition, by means of the water absorption capacity of the super-hydrophilic layer/nanofiber membrane, the water absorption performance of the non-woven fabric is effectively improved, and the hydrophilic performance and stiffness of the material are further improved to a certain extent, so that the composite wet membrane has high water absorption performance and humidification amount.

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 the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a composite wet film according to the present invention;

FIG. 2 is a schematic view of humidification of a humidification screen;

FIG. 3 is a top view of the wet film of FIG. 2, wherein the wet film is a zigzag humidification cartridge;

FIG. 4 is an SEM electron micrograph of CA nanofibers, wherein the CA fibers with uniform diameters are formed on a polyester/viscose blended spunlace nonwoven substrate, and the diameters are 0.5-0.6 μm.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Wet film	101	Nonwoven fabric
102	CA nanofiber layer	20	Humidifier
				200	Outer casing	210	Air inlet
220	Air outlet	300	Water tank

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The conventional wet film is generally a spunlace nonwoven fabric blended by PET/viscose, the distribution of the water of the nonwoven fabric is uneven, and when the wet film is used on a humidifying device (the wet film is vertically placed, the lower end of the wet film is soaked in a water tank, see fig. 3 specifically), the upper part of the wet film absorbs less water, or the time required for absorbing water is extremely long, and the water absorption rate is slow, so that the humidifying effect is influenced. When the air treatment device is wet in the humidification mode, as the moisture absorbed by the wet film 100 is less, the moisture which can be taken away by air when the air passes through the wet film is less; in addition, after moisture on the wet film is taken away by air, the self water absorption time of the wet film is long, and the taken moisture cannot be absorbed from the water tank by the wet film in time, so that the humidifying effect is seriously hindered.

Referring to fig. 1, the present application relates to a composite wet film 100, the wet film 100 comprising: a nonwoven fabric 101, a cellulose acetate nanofiber layer 102(CA cellulose nanofiber layer); the cellulose acetate nanofiber layer 102 is laminated to the nonwoven fabric 101.

Here, the nonwoven fabric is a fabric formed without spinning a woven fabric, and is formed by forming a web structure by orienting or randomly arranging spun short fibers or filaments and then reinforcing the web structure by mechanical, thermal bonding, chemical or other methods. It directly uses high polymer slice, short fiber or filament to form a novel fiber product with soft, air-permeable and plane structure through various fiber web forming methods and consolidation techniques. Simply, nonwoven fabrics are not interwoven, knitted together from yarn to yarn, but rather, the fibers are directly physically bonded together.

The composite wet film 100 uses two layers of materials, and the connection relationship between the two layers of materials is not limited, for example, the nonwoven fabric 101 and the cellulose acetate nanofiber layer 102 are bonded together by using an adhesive, or are sewn or hot-pressed together.

According to the technical scheme, the non-woven fabric 101 is adopted as the base material of the wet film 100 to be compounded with the nanofiber film, cellulose acetate nanofiber has good hydrophilic performance, and the cellulose acetate nanofiber forms a hydrophilic layer/nanofiber film with super-hydrophilic performance, so that the water absorption speed is obviously improved; in addition, by means of the water absorption capacity of the super-hydrophilic layer/nanofiber membrane, the water absorption capacity of the non-woven fabric 101 is effectively improved, and the hydrophilic performance and stiffness of the material are further improved to a certain extent, so that the composite wet membrane 100 disclosed by the utility model has higher water absorption performance and humidification quantity.

There are many types of nonwoven fabrics 101, for example, spunlace nonwoven fabrics, needle-punched nonwoven fabrics, heat-seal nonwoven fabrics, spunbonded meltblown nonwoven fabrics, stitch-bonded nonwoven fabrics, and the like. In consideration of water absorption performance and air permeability, the spun-laced non-woven fabric is prepared by blending PET fibers and viscose fibers.

In the above embodiments, there are various connection relationships between the cellulose acetate nanofiber layer 102 and the nonwoven fabric 101, and in order to make the connection between the cellulose acetate nanofiber layer 102 and the nonwoven fabric 101 more secure and not affect the performance of the two, in the present embodiment, the cellulose acetate nanofiber layer 102 is formed on the surface of the nonwoven fabric 101 through an electrostatic spinning process.

It should be noted that electrospinning, i.e. electrostatic spinning, is mainly to charge and deform a polymer solution or melt by means of a high voltage electrostatic field, forming a suspended conical droplet at the tip of a spray head. When the charge repulsion force of the surface of the liquid drop exceeds the surface tension thereof, the liquid drop surface can eject polymer tiny liquid drop flow, which is called as jet flow for short; these jets undergo high speed stretching by an electric field, solvent evaporation and solidification over a short distance and are finally deposited on a receiver.

In the electrospinning process, the spray device is filled with a charged polymer solution or melt. Under the action of an external electric field, the polymer liquid drops which are kept at the nozzle under the action of surface tension accumulate charges on the lower surface under the induction of the electric field and are subjected to an electric field force opposite to the direction of the surface tension. When the electric field is gradually increased, the droplet at the nozzle is elongated from a spherical shape into a conical shape, forming a so-called Taylorcone (Taylorcone). When the electric field strength increases to a critical value, the electric field force overcomes the surface tension of the liquid and is ejected from the Taylor cone. The jet flow vibrates and is unstable under the action of a high electric field, and irregular spiral motion with extremely high frequency is generated. In the high-speed oscillation, the jet flow is rapidly attenuated, and the solvent is rapidly volatilized, so that fibers with the diameter of nanometer scale are finally formed and scattered on the non-woven fabric 101 in a random manner to form polymer fibers.

In this example, the electrospinning process flow is as follows:

first, CA/acetone/DMSO (3:2) electrospinning dope with concentrations of 12 wt%, 15 wt%, and 18 wt% was prepared, and the spinning dope was injected into a cylinder of an electrospinning device, and PET/viscose spunlace nonwoven 101 was used as a base fabric. The specific process comprises the following steps: adjusting parameters such as perfusion speed, working voltage, receiving distance, rotary speed of the roller, a sliding table, temperature and humidity. And (4) after electrospinning for different time, taking down the composite membrane on the roller, and putting the composite membrane into a vacuum oven for drying.

In this embodiment, the electrospinning process has low cost, high production efficiency, and stable bonding with the nonwoven fabric 101.

To test the correlation of the manufacturing process of the composite wet film 100 with its overall performance, the experiment was as follows:

the embodiment of the utility model provides nonwoven/electrospun CA fiber membrane composite wet membrane 100 materials with different thicknesses. As shown in fig. 2, the composite wet film 100 is folded to form a zigzag humidification filter, the zigzag height H1 is 30mm, the inter-tooth space 21 is 5mm, the zigzag humidification filter is vertically placed on a water tank 300 (the placement mode is shown in fig. 3), the humidification filter absorbs water from the water tank 300, air enters from an air inlet 210 and vertically passes through the humidification filter, a humidification filter composite film is on the windward side, a substrate is on the leeward side, and water vapor passes through the composite film and the substrate and then is blown out from an air outlet 220.

And (3) performance testing:

the water absorption rate, water absorption, wind resistance and humidification of examples 1-4 were tested with the CA loading, CA fiber diameter and composite film thickness as variables, according to the following test methods:

test meter

And (3) testing the water absorption speed: reference GB/T21655.1-2008;

water absorption test: reference GB/T21655.1-2008;

wind resistance: reference GB/T14295-2008;

and (3) humidification quantity test: reference GB/T23332-;

as can be seen from examples 1 to 4, the water absorption rate is obviously higher than that of the comparative example, the water absorption rate is also obviously higher than that of the comparative example, and the water absorption rate is also higher than that of the comparative example when a proper amount is added, but the wind resistance is higher than that of the comparative example. The composite wet film 100 has a larger thickness of the composite wet film 100 than the conventional nonwoven fabric 101, and it is obviously reasonable that the wind resistance is high.

However, in example 5, the situation was changed such that when the loading amount reached 0.6mL/cm, the CA fiber diameter reached 0.8 to 0.9 μm, and the thickness of the composite film reached 0.05mm, although the water absorption rate was increased, the water absorption rate was rather decreased for the first time, and the amount of humidification was greatly decreased (relative to example 4).

Reason analysis: for the three factors of the CA loading capacity, the CA fiber diameter and the composite membrane thickness, the loading capacity is the greater parameter change (of course, the other two factors are also influenced in a comprehensive way, but the relative influence of a single factor is smaller), so that the initial judgment can be made that the CA loading capacity is not higher than 0.5mL/cm easily.

As can be seen from examples 1 to 4 in the table, the cellulose acetate nanofiber layer 102 has a fiber loading range: 0.15mL/cm to 0.5mL/cm, the diameter of the fibers of the CA nanofiber layer 102 is 0.4 μm to 0.8 μm, and the thickness of the wet film 100 is 0.01mm to 0.04mm is a preferred embodiment. Of course, if the addition amount of example 2 is the highest from the viewpoint of addition amount, the water absorption rate is also the highest, and it is more reasonable to select the fiber diameter of CA to be 0.5-0.6 in example 2.

It should be explained for the loading capacity that the nozzle sprays the volume of the spinning solution every 1cm of the nozzle in the electrospinning process.

In addition, the wet film 100 is provided in a zigzag shape, and the contact area with the air can be enlarged, so that the water absorption rate and the amount of humidification can be improved. The tooth height of the wet film 100 should not be too large, and should not be too small, and too large will cause the whole wet film 100 to occupy too large thickness space, and too small will influence the humidification effect of the wet film 100. In this embodiment, the tooth height of the wet film 100 is 20mm to 40 mm.

The interdental space of the wet film 100 is also limited appropriately, and if it is too large, it is equivalent to a reduction in the contact area of the wet film 100 with air, and if it is too small, it will humidify the wind resistance of the film 100. In view of this, in the present embodiment, the interdental space of the wet film 100 is 3mm to 8 mm.

In addition, the present invention provides a humidifier 20, the humidifier 20 including a support on which the wet film 100 is mounted. The wet film 100 itself may be configured in a flat plate state, a cylindrical shape, or an arc shape, and the holder may be adaptively selected depending on the specific configuration of the wet film 100.

The present invention also provides an air treatment apparatus in which the humidifier 20 is installed. Here, the air treatment device may be an air conditioner, a humidifying device, or a fan.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A wet film, comprising:

a non-woven fabric;

the cellulose acetate nanofiber layer, the cellulose acetate nanofiber layer with the non-woven fabrics is range upon range of the setting, just the non-woven fabrics with adopt the adhesive to bond or sew up the connection between the cellulose acetate nanofiber layer.

2. The wet film of claim 1, wherein the nonwoven fabric is made from a blend of PET fibers and viscose fibers.

3. The wet film of claim 1, wherein the cellulose acetate nanofiber layer is formed on the surface of the nonwoven fabric by an electrospinning process.

4. The wet film of any of claims 1 to 3, wherein the cellulose acetate nanofiber layer has a fiber diameter of 0.4 μm to 0.8 μm.

5. A wet film according to any of claims 1 to 3, wherein said wet film has a thickness of 0.01mm to 0.04 mm.

6. The wet film of any one of claims 1 to 3, wherein the wet film is in a zig-zag configuration.

7. The wet film of claim 6, wherein the wet film has a tooth height of 20mm to 40 mm.

8. The wet film of claim 6, wherein the inter-tooth spacing of the wet film is from 3mm to 8 mm.

9. A humidifier comprising a support and a wet film according to any one of claims 1 to 8, said wet film being mounted on said support.

10. An air treatment device comprising the humidifier of claim 8.

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