Oil storage cotton and preparation method thereof and electronic cigarette atomizer

Abstract

The present invention provides an oil storage cotton, which is made of a core-sheath composite fiber yarn, the core-sheath composite fiber yarn is a core-sheath structure, the core-sheath composite fiber yarn comprises spandex fiber and polyester fiber, the polyester fiber is a core layer, and the spandex fiber is a skin layer covering the polyester fiber. The oil storage cotton provided by the present invention is made of a core-sheath composite fiber yarn, which not only has good oil storage capacity, but also has low water absorption and good dimensional stability. The present invention also provides a preparation method of the oil storage cotton and an electronic cigarette atomizer.

Description

Technical Field

[0001] The invention relates to the technical field of oil storage cotton structures, in particular to an oil storage cotton and a preparation method thereof and an electronic cigarette atomizer. Background Art

[0002] Electronic cigarettes, also known as virtual cigarettes, steam cigarettes, aerosol generating devices, etc., are mainly used to simulate the feeling of smoking without affecting health, for the purpose of quitting smoking or replacing cigarettes.

[0003] The electronic cigarette atomizer is the core component of the electronic cigarette, and the oil storage cotton is one of the important components of the electronic cigarette atomizer. The main function of the oil storage cotton is to store the smoke oil. The oil storage capacity and oil locking capacity of the oil storage cotton are closely related to the service life of the oil storage cotton and the taste of the electronic cigarette. The stronger the oil storage capacity and oil locking capacity of the oil storage cotton, the longer the service life of the oil storage cotton (no need to frequently replace the oil storage cotton or frequently refill the smoke oil), the larger the amount of smoke of the electronic cigarette, and the better the taste of smoking. At the same time, it is also conducive to the miniaturization design of the electronic cigarette (for the same amount of smoke oil storage, the stronger the oil storage capacity of the oil storage cotton, the smaller the volume required for the oil storage cotton).

[0004] Existing oil storage cotton mainly adopts PP material, or PET material, or PA+PET material. In terms of oil storage capacity and oil locking capacity, since PA is added to PA+PET material, PA contains amide bonds, and the amide bonds match the smoke oil in polarity, it can have a strong adsorption effect with the smoke oil, thereby improving the oil storage capacity and oil locking capacity of the oil storage cotton. However, since the polarity of PA itself is strong, the oil storage cotton made of PA+PET material is easy to absorb water, which can easily cause the oil storage cotton to deform, making the size of the oil storage cotton unstable, and it is difficult to control the size consistency of the oil storage cotton during production. Summary of the invention

[0005] The purpose of the present invention is to provide an oil storage cotton which is made of skin-core composite fiber yarn and has not only good oil storage capacity but also low water absorption and good dimensional stability.

[0006] The present invention provides an oil storage cotton, which is made of a core-sheath composite fiber yarn. The core-sheath composite fiber yarn is a core-sheath structure. The core-sheath composite fiber yarn comprises spandex fiber and polyester fiber. The polyester fiber is a core layer, and the spandex fiber is a skin layer covering the polyester fiber.

[0007] In one achievable manner, the components of the spandex fiber include spandex resin and a first filler; wherein the mass fraction of the spandex resin accounts for 95%-97%, and the mass fraction of the first filler accounts for 3%-5%.

[0008] In one achievable manner, the first filler comprises components of at least one of titanium dioxide, silicon dioxide, talc, calcium carbonate and calcium oxide.

[0009] In one achievable manner, the polyester fiber comprises polyester resin and a second filler; wherein the mass fraction of the polyester resin accounts for 95%-97%, and the mass fraction of the second filler accounts for 3%-5%.

[0010] In one achievable manner, the second filler comprises components of at least one of titanium dioxide, silicon dioxide, talc, calcium carbonate and calcium oxide.

[0011] In one achievable manner, the fineness of the core-sheath composite fiber is 4.5 dtex-6 dtex, and the ratio of the cross-sectional area of ​​the spandex fiber to the polyester fiber is 1:1.

[0012] The present invention also provides a method for preparing oil storage cotton, which is used to prepare the above-mentioned oil storage cotton. The method for preparing the oil storage cotton comprises the following steps:

[0013] S10: preparing a spandex resin material and a polyester resin material;

[0014] S20: adding the spandex resin material and the polyester resin material prepared in the above step S10 to a twin-screw composite spinning device, the spandex resin material is melt-extruded by the first screw of the twin-screw composite spinning device and then enters the outer tube channel of the twin-screw composite spinning device, and the polyester resin material is melt-extruded by the second screw of the twin-screw composite spinning device and then enters the inner tube channel of the twin-screw composite spinning device, and the spandex resin material and the polyester resin material are compounded into a fiber melt with a skin-core structure on a spinneret provided with a plurality of spinneret holes after passing through their respective channels; the fiber melt is then extruded into filaments through a hollow composite spinneret, and then sequentially cooled, tension adjusted by a guide wire disc, and wound by a winding device to obtain a skin-core composite fiber filament;

[0015] S30: placing the core-sheath composite fiber yarn prepared in the above step S20 on a texturing machine, and using the texturing machine to perform double-twisting and texturing on the core-sheath composite fiber yarn to form composite filaments; then warping and plying the composite filaments, and then heating and curing them to form rods; after the rods are cooled, cutting the rods into the required size to obtain oil storage cotton.

[0016] In one achievable manner, the components of the spandex resin material include spandex resin and a first filler; the preparation process of the spandex resin material includes: drying 95%-97% of spandex resin particles and 3%-5% of the first filler to make the water content of the spandex resin particles and the first filler less than 20ppm; then putting the spandex resin particles and the first filler into a mixer and stirring them evenly to obtain the spandex resin material; wherein the components of the first filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh size of the first filler is 400-800 meshes.

[0017] In one achievable manner, the polyester resin material comprises components of polyester resin and a second filler; the preparation process of the polyester resin material comprises: drying 95%-97% of polyester resin particles and 3%-5% of the second filler so that the moisture content of the polyester resin particles and the second filler is less than 20ppm; then putting the polyester resin particles and the second filler into a mixer and stirring them evenly to obtain the polyester resin material; wherein the components of the second filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh size of the second filler is 400-800 meshes.

[0018] In one feasible manner, in the step S30, before the sheath-core composite fiber yarn is double-twisted and textured by the texturing machine, the sheath-core composite fiber yarn is first heated by a tunnel heating tube on the texturing machine, and the temperature setting ranges at both ends of the tunnel heating tube are 190°C-200°C and 120°C-160°C, respectively.

[0019] In one achievable manner, in the step S30, when the sheath-core composite fiber yarn is double-twisted and textured by the texture machine, the drafting multiple during texture addition is set to 1.2-1.5 times, and the tension ratio is set to 0.8-1.2.

[0020] The present invention also provides an electronic cigarette atomizer, comprising the oil storage cotton mentioned above.

[0021] The oil storage cotton provided by the present invention is made of core-sheath composite fiber filaments, wherein the core-sheath composite fiber filaments have polyester fiber as the core layer and spandex fiber as the sheath layer, wherein both the polyester fiber and the spandex fiber have a strong adsorption effect on the cigarette oil, so that the oil storage cotton has good oil storage capacity; at the same time, since the water absorption rate of the spandex fiber is relatively low, the use of the spandex fiber with low water absorption rate as the sheath layer can reduce the water absorption rate of the oil storage cotton, thereby making the oil storage cotton have good dimensional stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1Schematic diagram of the structure of the core-sheath composite fiber in an embodiment of the present invention.

[0023] Figure 2 for Figure 1 Schematic cross-section of .

[0024] Figure 3 Schematic diagram of the structure of the oil storage cotton in the embodiment of the present invention. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0027] The directional words such as up, down, left, right, front, back, top, bottom, etc. (if any) involved in the specification and claims of the present invention are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the clarity and convenience of expressing the technical solution. It should be understood that the use of directional words should not limit the scope of protection claimed in the present invention.

[0028] like Figures 1 to 3 As shown, the oil storage cotton 1 provided in the embodiment of the present invention is made of a core-sheath composite fiber yarn 10. The core-sheath composite fiber yarn 10 is a core-sheath structure. The core-sheath composite fiber yarn 10 includes spandex fiber 101 and polyester fiber 102. The polyester fiber 102 is the core layer, and the spandex fiber 101 is the skin layer covering the polyester fiber 102.

[0029] Specifically, the oil storage cotton 1 provided in the present embodiment is made of a core-sheath composite fiber filament 10, wherein the core-sheath composite fiber filament 10 has a polyester fiber 102 as a core layer and a spandex fiber 101 as a sheath layer, wherein both the polyester fiber 102 and the spandex fiber 101 have a strong adsorption effect on the tobacco oil, so that the oil storage cotton 1 has a good oil storage capacity; at the same time, since the water absorption rate of the spandex fiber 101 is relatively low, using the spandex fiber 101 with low water absorption rate as the sheath layer can reduce the water absorption rate of the oil storage cotton 1, thereby making the oil storage cotton 1 have good dimensional stability.

[0030] As an embodiment, the components of the spandex fiber 101 include spandex resin and a first filler; wherein the mass fraction of the spandex resin accounts for 95%-97%, and the mass fraction of the first filler accounts for 3%-5%. The components of the first filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide. The mesh number of the first filler is 400-800 meshes.

[0031] As an embodiment, the polyester fiber 102 includes polyester resin and a second filler; wherein the mass fraction of the polyester resin is 95%-97%, and the mass fraction of the second filler is 3%-5%. The second filler includes at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide. The mesh number of the second filler is 400-800 meshes.

[0032] Specifically, by adding fillers to the spandex fiber 101 and the polyester fiber 102, the fillers can improve the polymer properties of the spandex fiber 101 and the polyester fiber 102, and improve the mechanical strength, dimensional stability and compression creep resistance of the core-skin composite fiber filament 10, thereby further improving the dimensional stability of the oil storage cotton 1.

[0033] As an embodiment, the fineness of the core-sheath composite fiber filament 10 (single filament) is 4.5 dtex-6 dtex.

[0034] As an embodiment, the ratio of the cross-sectional area of ​​the spandex fiber 101 to the polyester fiber 102 is 1:1. Figure 2 As shown, the cross-sectional area of ​​the spandex fiber 101 is S1, and the cross-sectional area of ​​the polyester fiber 102 is S2, that is, S1:S2=1:1.

[0035] The embodiment of the present invention further provides a method for preparing oil storage cotton, which is used to prepare the above-mentioned oil storage cotton 1. The method for preparing the oil storage cotton comprises the following steps:

[0036] S10: preparing a spandex resin material and a polyester resin material;

[0037] S20: adding the spandex resin material and the polyester resin material prepared in the above step S10 to a twin-screw composite spinning device, the spandex resin material enters the outer tube channel of the twin-screw composite spinning device after being melt-extruded by the first screw of the twin-screw composite spinning device, and the polyester resin material enters the inner tube channel of the twin-screw composite spinning device after being melt-extruded by the second screw of the twin-screw composite spinning device. After passing through their respective channels, the spandex resin material and the polyester resin material are compounded into a fiber melt having a skin-core structure on a spinneret provided with a plurality of spinneret holes; the fiber melt is then extruded into filaments through a hollow composite spinneret, and then successively cooled (for example, by cooling in a water tank or other cooling methods), tension adjusted by a guide wire disc, and wound by a winding device to obtain a skin-core composite fiber filament 10;

[0038] S30: Place the core-sheath composite fiber yarn 10 prepared in the above step S20 on a texturing machine, and use the texturing machine to perform double-twisting and texturing on the core-sheath composite fiber yarn 10 to form a composite filament; then warp and ply the composite filament, and then heat and cure to form a rod, the heating temperature is 135°C-150°C, and the heating and curing time is 130 seconds; after the rod is cooled (for example, cooled to room temperature), cut the rod to the required size to obtain the oil storage cotton 1.

[0039] Specifically, the purpose of texturizing the core-sheath composite fiber filament 10 by using a texturizing machine in the above-mentioned step S30 is to improve the elasticity of the core-sheath composite fiber filament 10 and make the tight core-sheath composite fiber filament 10 fluffy (the core-sheath composite fiber filament 10 extruded through the hollow composite spinneret in the above-mentioned step S20 is in a tight state), so that the finally obtained oil storage cotton 1 has stronger oil absorption and storage capacity.

[0040] As an embodiment, the components of the spandex resin material include spandex resin and a first filler, and the components of the polyester resin material include polyester resin and a second filler.

[0041] In the above step S10, the preparation process of the spandex resin material includes: drying 95%-97% of the spandex resin particles and 3%-5% of the first filler at a drying temperature of 100°C for 24 hours, so that the water content of the spandex resin particles and the first filler is less than 20ppm; then the spandex resin particles and the first filler are placed in a mixer and stirred for 3 hours, and the spandex resin material is obtained by stirring evenly; wherein the components of the first filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh size of the first filler is 400-800 meshes.

[0042] In the above step S10, the preparation process of the polyester resin material includes: drying 95%-97% of the polyester resin particles and 3%-5% of the second filler at a drying temperature of 100°C for 24 hours, so that the moisture content of the polyester resin particles and the second filler is less than 20ppm; then the polyester resin particles and the second filler are placed in a mixer and stirred for 3 hours, and the polyester resin material is obtained by stirring evenly; wherein the components of the second filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh size of the second filler is 400-800 meshes.

[0043] As an embodiment, in the above step S20, the fineness of the core-sheath composite fiber filament 10 (single filament) is 4.5 dtex-6 dtex.

[0044] As an embodiment, in the above step S30, before the sheath-core composite fiber yarn 10 is double-twisted and textured by the texturing machine, the sheath-core composite fiber yarn 10 is first heated by the tunnel heating tube on the texturing machine, and the temperature setting ranges at both ends of the tunnel heating tube are 190°C-200°C and 120°C-160°C respectively. By heating the sheath-core composite fiber yarn 10 before double-twisted and textured, the formed composite filament material is made more fluffy, so that the finally obtained oil storage cotton 1 has stronger oil absorption and storage capacity.

[0045] As an implementation mode, in the above step S30, when the sheath-core composite fiber filament 10 is double-twisted and textured by a texture machine, the drafting multiple during texture addition is set to 1.2-1.5 times, and the tension ratio is set to 0.8-1.2.

[0046] As an embodiment, in the above step S30, the solidified rod material can be a cylindrical structure, an elliptical cylindrical structure or other special-shaped structures, and the finally obtained oil storage cotton 1 is also a cylindrical structure, an elliptical cylindrical structure or other special-shaped structures (such as Figure 3 As shown, in this embodiment, the oil storage cotton 1 is a cylindrical structure). At the same time, a mounting hole 11 is formed in the middle of the oil storage cotton 1, and the mounting hole 11 is used to install the oil guide cotton (not shown).

[0047] As an implementation mode, when manufacturing the oil storage cotton 1, the humidity of the production environment is controlled to be 30%-40%.

[0048] The embodiment of the present invention further provides an electronic cigarette atomizer, comprising the above-mentioned oil storage cotton 1.

[0049] The oil storage cotton 1 provided in this embodiment is made of a core-skin composite fiber filament 10, wherein the core-skin composite fiber filament 10 has a polyester fiber 102 as a core layer and a spandex fiber 101 as a skin layer, wherein both the polyester fiber 102 and the spandex fiber 101 have a strong adsorption effect on the smoke oil, so that the oil storage cotton 1 has a good oil storage capacity; at the same time, since the water absorption rate of the spandex fiber 101 is low, the spandex fiber 101 with low water absorption rate is used as the skin layer, which can reduce the water absorption rate of the oil storage cotton 1, thereby making the oil storage cotton 1 have good dimensional stability. At the same time, by adding fillers to the spandex fiber 101 and the polyester fiber 102, the fillers can improve the polymer properties of the spandex fiber 101 and the polyester fiber 102, and improve the mechanical strength, dimensional stability and compression creep resistance of the core-skin composite fiber filament 10, thereby further improving the dimensional stability of the oil storage cotton 1.

[0050] Example

[0051] This embodiment provides a method for preparing oil storage cotton, comprising the following steps:

[0052] S10: preparing a spandex resin material and a polyester resin material;

[0053] The components of the spandex resin material include spandex resin and a first filler, and the preparation process of the spandex resin material includes: drying 95%-97% of spandex resin particles and 3%-5% of the first filler at a drying temperature of 100° C. for 24 hours, so that the water content of the spandex resin particles and the first filler is less than 20 ppm; then putting the spandex resin particles and the first filler into a mixer and stirring for 3 hours, and stirring evenly to obtain the spandex resin material; wherein the components of the first filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh number of the first filler is 400-800 meshes;

[0054] The polyester resin material comprises polyester resin and a second filler, and the preparation process of the polyester resin material comprises: drying 95%-97% of polyester resin particles and 3%-5% of the second filler at a drying temperature of 100° C. for 24 hours, so that the moisture content of the polyester resin particles and the second filler is less than 20 ppm; then the polyester resin particles and the second filler are put into a mixer and stirred for 3 hours, and the polyester resin material is obtained by stirring evenly; wherein the components of the second filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh number of the second filler is 400-800 meshes.

[0055] S20: adding the spandex resin material and the polyester resin material prepared in the above step S10 to a twin-screw composite spinning device, the spandex resin material is melt-extruded by the first screw of the twin-screw composite spinning device and then enters the outer tube channel of the twin-screw composite spinning device, and the polyester resin material is melt-extruded by the second screw of the twin-screw composite spinning device and then enters the inner tube channel of the twin-screw composite spinning device, and after passing through their respective channels, the spandex resin material and the polyester resin material are compounded into a fiber melt having a skin-core structure on a spinneret provided with a plurality of spinneret holes; the fiber melt is then extruded into filaments through a hollow composite spinneret, and then sequentially cooled in a water tank, adjusted in tension by a guide wire disc, and wound by a winding device to obtain a skin-core composite fiber filament 10;

[0056] S30: After the core-sheath composite fiber filament 10 prepared in the above step S20 is allowed to stand for 24 hours, the core-sheath composite fiber filament 10 is placed on a texturing machine, and the core-sheath composite fiber filament 10 is heated by a tunnel heating tube on the texturing machine, and the temperature setting ranges at both ends of the tunnel heating tube are 190°C-200°C and 120°C-160°C respectively. At the same time, the drafting multiple during texturing is set to 1.2-1.5 times, and the tension ratio is set to 0.8-1.2. The core-sheath composite fiber filament 10 is then double-twisted and texturized by the texturing machine to form a composite filament; the composite filament is then warped and ply-stranded, and then heated and cured to form a rod, the heating temperature is 135°C-150°C, and the heating and curing time is 130 seconds; after the rod is cooled to room temperature, the rod is cut to the required size with a mold to obtain the oil storage cotton 1.

[0057] The oil storage cotton 1 with an outer diameter of 2 cm, an inner diameter of 0.5 cm (that is, the diameter of the mounting hole 11 of the oil storage cotton 1 is 0.5 cm), and a height of 2.8 cm was tested, and the saturated oil storage rate of the oil storage cotton 1 was measured to be 91%. After standing for 72 hours, the moisture regain and volume deformation rate of the oil storage cotton 1 were tested, and the volume deformation rate was 0.8%, and the moisture regain was 0.4%.

[0058] The oil storage cotton of the same size with a core-skin structure made of 30% PET (polyester resin) and 70% PA (polyamide) was taken, and its saturated oil storage rate was measured to be 91%; after standing for 72 hours, the moisture regain and volume deformation rate of the oil storage cotton were tested, and its volume deformation rate was 4%, and the moisture regain was 4.5%. It can be seen that the oil storage cotton 1 prepared in this embodiment has the same or similar oil storage rate as the traditional PA+PET oil storage cotton, indicating that the oil storage cotton 1 of this embodiment has good oil storage capacity; but the moisture regain and volume deformation rate of the oil storage cotton 1 of this embodiment are greatly reduced, indicating that the oil storage cotton 1 of this embodiment has lower water absorption and better dimensional stability.

[0059] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An oil storage cotton, characterized in that: The oil storage cotton is made of a core-skin composite fiber yarn, the core-skin composite fiber yarn is a core-skin structure, the core-skin composite fiber yarn comprises spandex fiber and polyester fiber, the polyester fiber is a core layer, and the spandex fiber is a skin layer covering the polyester fiber; The components of the spandex fiber include spandex resin and a first filler, and the components of the first filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide; the components of the polyester fiber include polyester resin and a second filler, and the components of the second filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide; In the spandex fiber, the mass fraction of the spandex resin accounts for 95%-97%, and the mass fraction of the first filler accounts for 3%-5%; in the polyester fiber, the mass fraction of the polyester resin accounts for 95%-97%, and the mass fraction of the second filler accounts for 3%-5%.

2. The oil storage cotton according to claim 1, characterized in that: The mesh number of the first filler is 400-800 meshes.

3. The oil storage cotton according to claim 1, characterized in that: The mesh number of the second filler is 400-800 meshes.

4. The oil storage cotton according to claim 1, characterized in that: The fineness of the core-sheath composite fiber is 4.5 dtex-6 dtex, and the ratio of the cross-sectional area of ​​the spandex fiber to the polyester fiber is 1:

1.

5. A method for preparing oil storage cotton, characterized in that: Used to make the oil storage cotton according to any one of claims 1 to 4, the preparation method of the oil storage cotton comprises the following steps: S10: preparing a spandex resin material and a polyester resin material; wherein the spandex resin material comprises a spandex resin and a first filler, and the polyester resin material comprises a polyester resin and a second filler; S20: adding the spandex resin material and the polyester resin material prepared in the above step S10 to a twin-screw composite spinning device, the spandex resin material is melt-extruded by the first screw of the twin-screw composite spinning device and then enters the outer tube channel of the twin-screw composite spinning device, and the polyester resin material is melt-extruded by the second screw of the twin-screw composite spinning device and then enters the inner tube channel of the twin-screw composite spinning device, and the spandex resin material and the polyester resin material are compounded into a fiber melt with a skin-core structure on a spinneret provided with a plurality of spinneret holes after passing through their respective channels; the fiber melt is then extruded into filaments through a hollow composite spinneret, and then sequentially cooled, tension adjusted by a guide wire disc, and wound by a winding device to obtain a skin-core composite fiber filament; S30: placing the core-sheath composite fiber yarn prepared in the above step S20 on a texturing machine, and using the texturing machine to perform double-twisting and texturing on the core-sheath composite fiber yarn to form composite filaments; then warping and plying the composite filaments, and then heating and curing them to form rods; after the rods are cooled, cutting the rods into the required size to obtain oil storage cotton.

6. The method for preparing the oil storage cotton according to claim 5, characterized in that: The preparation process of the spandex resin material comprises: drying 95%-97% of spandex resin particles and 3%-5% of a first filler so that the water content of the spandex resin particles and the first filler is less than 20 ppm; then putting the spandex resin particles and the first filler into a mixer and stirring them evenly to obtain the spandex resin material; wherein the components of the first filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh size of the first filler is 400-800 meshes.

7. The method for preparing the oil storage cotton according to claim 5, characterized in that: The preparation process of the polyester resin material comprises: drying 95%-97% of polyester resin particles and 3%-5% of a second filler so that the moisture content of the polyester resin particles and the second filler is less than 20ppm; then putting the polyester resin particles and the second filler into a mixer and stirring them evenly to obtain the polyester resin material; wherein the components of the second filler include at least one of titanium dioxide, silicon dioxide, talcum powder, calcium carbonate and calcium oxide, and the mesh number of the second filler is 400-800 meshes.

8. The method for preparing the oil storage cotton according to claim 5, characterized in that: In the step S30, before the sheath-core composite fiber yarn is double-twisted and textured by the texturing machine, the sheath-core composite fiber yarn is first heated by a tunnel heating tube on the texturing machine, and the temperature setting ranges at both ends of the tunnel heating tube are 190°C-200°C and 120°C-160°C respectively.

9. The method for preparing the oil storage cotton according to claim 5, characterized in that: In the step S30, when the sheath-core composite fiber yarn is double-twisted and textured by the texture machine, the drafting multiple during texture addition is set to 1.2-1.5 times, and the tension ratio is set to 0.8-1.

2.

10. An electronic cigarette atomizer, characterized in that: It comprises the oil storage cotton as described in any one of claims 1-4.

Images