Method for preparing oil storage cotton and atomizer for electronic cigarette

Abstract

The application provides a preparation method of oil storage cotton, comprising the following steps: S11, putting PE particles into a mixer after drying treatment to stir uniformly to obtain first mixture; S12, putting PP resin into a mixer after drying treatment to stir uniformly to obtain second mixture; S13, respectively placing the first mixture and the second mixture on a double-screw composite spinning device, and controlling the diameter of single filament to be 10-20 microns; S14, generating skin-core hollow composite fiber filament through the first mixture and the second mixture, and performing first elastic recovery on the skin-core hollow composite fiber filament to generate composite filament; S15, mixing and beaming the composite filament, performing second elastic recovery, and then performing heating forming to generate the oil storage cotton. The oil storage cotton prepared through the PP and PE composite filament through two elastic recoveries and then through the drying channel warming forming has good size stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic cigarettes, and particularly relates to a preparation method of oil storage cotton and an atomizer for electronic cigarettes. BACKGROUND

[0002] The electronic cigarette is also named virtual cigarette, vapor cigarette, aerosol generating device, etc., and is mainly used for simulating the feeling of smoking under the premise of not affecting health, so as to quit smoking or replace cigarettes.

[0003] The electronic cigarette is internally provided with an oil storage assembly and an atomization assembly, and the oil storage assembly stores tobacco tar therein; the atomization assembly usually comprises an oil guide member and a heating member, the oil guide member is used for absorbing and conducting the tobacco tar in the oil storage assembly to the heating member, so as to heat and atomize the tobacco tar to form smoke for a user to smoke. In order to prevent the tobacco tar from flowing or shaking freely in the oil storage assembly, the oil storage cotton is usually arranged in the oil storage assembly, so as to absorb and store the tobacco tar, and prevent the tobacco tar from shaking in the oil storage assembly, thereby preventing the phenomenon of oil leakage.

[0004] The currently used oil storage cotton is prepared from PET and PA6 composite filaments, the oil storage cotton has strong oil absorption capacity and good oil storage rate due to the good polarity of PET and PA, but is easy to absorb water due to the polarity problem, and thus the size of the oil storage cotton is elongated after absorbing water or tobacco tar, the size of the oil storage cotton is unstable and is difficult to control and match with a smoking tool.

[0005] Therefore, a preparation method of oil storage cotton and an atomizer for electronic cigarettes are needed to solve the above problems. SUMMARY

[0006] The present application solves the technical problem, and provides a preparation method of oil storage cotton and an atomizer for electronic cigarettes, the oil storage cotton with good size stability is prepared by using PP+PE composite filaments after twice elasticizing and warm forming.

[0007] The technical problem of the present application is solved by the following technical scheme:

[0008] A preparation method of oil storage cotton, comprising: S11, drying PE particles and putting them into a mixer to stir uniformly to obtain first mixture; S12, drying PP resin and putting it into a mixer to stir uniformly to obtain second mixture; S13, putting the first mixture and the second mixture on a double-screw composite spinning device respectively, and controlling the diameter of a single filament to be 10-20 microns; S14, generating skin-core hollow composite fiber filaments from the first mixture and the second mixture, and performing first elasticizing on the skin-core hollow composite fiber filaments to generate composite filaments; S15, mixing and warping the composite filaments, performing second elasticizing, and then performing warm forming to generate the oil storage cotton.

[0009] In the preferred embodiment of the present application, the step S14 comprises: sending the first mixture into the outer tube channel of the spinning machine after being extruded by the first screw of the double-screw composite spinning device, and sending the second mixture into the inner tube channel of the spinning machine after being extruded by the second screw; extruding the composite fiber melt through the spinneret plate with multiple spinnerets, and then extruding through the hollow composite spinneret plate to send into the water tank for cooling; adjusting the tension through the godet, and then winding through the high-speed winding device to obtain the core-sheath hollow composite fiber filament; and sending the core-sheath hollow composite fiber filament after standing to the elasticizer for the first time to form the composite filament.

[0010] In the preferred embodiment of the present application, the step S15 comprises: sending the composite filament into the carding machine for mixing and beaming, and then sending the composite filament into the elasticizer for the second time; sending the composite filament after the second time of elasticizing into the tunnel heating pipe for heating, and then extruding and cutting through the oil storage cotton structure mold, and cooling to room temperature to obtain the oil storage cotton.

[0011] In the preferred embodiment of the present application, the volume ratio of the second mixture to the first mixture is 1:2-2.5.

[0012] In the preferred embodiment of the present application, the step of sending the core-sheath hollow composite fiber filament after standing to the elasticizer for the first time to form the composite filament comprises: sending the core-sheath hollow composite fiber filament after standing to the elasticizer for the first time, setting the draft multiple of the first time of elasticizing to be 1.1-1.6 times, and setting the tension ratio to be 0.6-1.4; and forming the composite filament through double twisting and elasticizing.

[0013] In the preferred embodiment of the present application, the step of sending the composite filament into the carding machine for mixing and beaming, and then sending the composite filament into the elasticizer for the second time comprises: sending the composite filament into the carding machine for mixing and beaming, and then sending the composite filament into the elasticizer for the second time, setting the draft multiple of the second time of elasticizing to be 1.1-1.3 times, and setting the tension ratio to be 0.6-1.2.

[0014] In the preferred embodiment of the present application, the method further comprises: drying the PE particles and the PP resin to make the water content of the PE particles and the PP resin be within a preset interval, and the preset interval is 10 mmp-20 mmp.

[0015] In the preferred embodiment of the present application, the temperature of the first screw is controlled to be 140℃-190℃, and the temperature of the second screw is controlled to be 50℃-90℃.

[0016] In the preferred embodiment of the present application, the temperature in the above-mentioned tunnel heating pipe is 140-190 DEG C.

[0017] An atomizer for an electronic cigarette, comprising an oil storage cotton, which is made by the preparation method of the oil storage cotton according to any one of the above-mentioned methods.

[0018] The present application uses the above technical scheme to achieve the technical effect that: after the PP+PE composite filament is subjected to two times of elastic recovery, and is subjected to warm forming through an oven, the oil storage cotton with good dimensional stability can be prepared, and the oil storage cotton has the advantages of good oil storage rate and low production cost.

[0019] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and to be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail, and the accompanying drawings are described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A flow chart of the preparation method of the oil storage cotton according to the present application is shown. DETAILED DESCRIPTION

[0021] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the embodiments of the present application are described in detail below, and the examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the embodiments of the present application. Through the description of the specific embodiments, the technical means and effects adopted by the present application to achieve the predetermined purposes can be more deeply and specifically understood, and the accompanying drawings are only provided for reference and illustration, and are not used to limit the present application.

[0022] Please refer to Figure 1 , Figure 1 A flow chart of the preparation method of the oil storage cotton according to the present application is shown.

[0023] As Figure 1 shown, the preparation method of the oil storage cotton according to the present embodiment comprises the following steps:

[0024] S11: After the PE particles are subjected to drying treatment, the first mixture is obtained by stirring the PE particles in a mixer.

[0025] S12: After the PP resin is subjected to drying treatment, the second mixture is obtained by stirring the PP resin in a mixer.

[0026] Optionally, the PE particles and the PP resin are subjected to drying treatment to make the water content of the PE particles and the PP resin in a preset interval, the preset interval being 10-20 ppm. Using PE particles or the PP resin with excessive water content to produce manufacturing can cause some production and processing problems, thereby affecting product quality. For example, surface layer cracking, reflection, product indentation, bubbles, and molding difficulty. And the higher the water content of the PE particles and the PP resin, the lower the oil storage rate of the oil storage cotton finally made.

[0027] Exemplarily, the low-melting PE particles are subjected to drying treatment, the drying temperature being 50 degrees, the drying time being 24 hours, the water content being less than 20 ppm, and preferably, the water content being between 10-20 ppm; then put into a mixer for stirring for 5 hours to obtain a first mixture; the high-melting PP resin is subjected to drying treatment, the drying temperature being 60 degrees, the drying time being 24 hours, the water content being less than 20 ppm, and preferably, the water content being between 10-20 ppm; then put into a mixer for stirring for 5 hours to obtain a second mixture.

[0028] The drying treatment temperature and time of the PE particles are not limited to 50°C and 24 hours, the drying temperature can be an interval value, for example, 40-60°C, and can also be a higher temperature, for example, 70°C, 80°C or 100°C, etc., but the drying treatment temperature cannot exceed the melting point of the PE particles, in order to avoid melting of the PE particles, the highest drying treatment temperature is 10-20°C lower than the melting point temperature; the drying time is also not limited to the above-mentioned 24 hours, and can also be an interval value, for example, 20-28 hours, etc. The higher the temperature during drying treatment, the drying treatment time can be correspondingly shortened, which can be adjusted according to actual operation.

[0029] The drying treatment temperature and time of the PP resin are also not limited to 60°C and 24 hours, and the specific description can refer to the drying treatment temperature and time of the PE particles described above, which will not be described in detail here.

[0030] The water content of the PP resin and the PE particles after drying is also not limited to less than 20 ppm, and can also be 30 ppm and 10 ppm, etc., which is not limited here, and can be adjusted accordingly according to actual needs or conditions.

[0031] Optionally, the volume ratio of the second mixture to the first mixture is 1:2-2.5. That is, the ratio of the second mixture to the first mixture is 1:2-2.5, for example, the volume ratio of the second mixture to the first mixture can be 1:2.1 or 1:2.3, etc.

[0032] S13: Place the first mixture and the second mixture on a double screw composite spinning device respectively, and control the diameter of a single filament to be 10-20 microns.

[0033] S14: Generate a skin-core hollow composite fiber filament through the first mixture and the second mixture, and perform a first elastic recovery on the skin-core hollow composite fiber filament to generate a composite filament;

[0034] Optionally, the step S14 comprises: sending the first mixture into an outer tube channel of a spinning machine after being melt-extruded by a first screw in the double screw composite spinning device, and sending the second mixture into an inner tube channel of the spinning machine after being melt-extruded by a second screw; extruding the composite fiber melt through a spinneret plate with multiple jet holes, and then extruding through a hollow composite spinneret plate and sending into a water tank for cooling; adjusting the tension through a godet, winding through a high-speed winding device, and obtaining the skin-core hollow composite fiber filament; and sending the skin-core hollow composite fiber filament after being rested to an elastic recovery machine to perform a first elastic recovery, so as to form the composite filament.

[0035] Optionally, the temperature of the first screw is controlled to be 140-190°C, and the temperature of the second screw is controlled to be 50-90°C.

[0036] Optionally, the step of sending the skin-core hollow composite fiber filament after being rested to an elastic recovery machine to perform a first elastic recovery, so as to form the composite filament, comprises: sending the skin-core hollow composite fiber filament after being rested to the elastic recovery machine to perform a first elastic recovery, setting the draft multiple of the first elastic recovery to be 1.1-1.6 times, and setting the tension ratio to be 0.6-1.4; and forming the composite filament through double-twist elastic recovery.

[0037] Optionally, the first mixture is sent into an outer tube channel of a spinning machine after being melt-extruded by a first screw, and the temperature is controlled to be 140-190°C; the second mixture is sent into an inner tube channel of the spinning machine after being melt-extruded by a second screw, and the temperature is controlled to be 50-90°C; the composite fiber melt is extruded through a spinneret plate with multiple jet holes, and then extruded through a hollow composite spinneret plate and sent into a water tank for cooling; the tension is adjusted through a godet, and winding is performed through a high-speed winding device, so as to obtain the skin-core hollow composite fiber filament; the filament is wound into a roll, and after being rested for 24 hours, the filament is sent to an elastic recovery machine, the draft multiple of the elastic recovery is set to be 1.1-1.6 times, the tension ratio is set to be 0.6-1.4, and then double-twist elastic recovery is performed to form the composite filament, which is wound for standby use.

[0038] Optionally, the standing time of the core-in-sheath hollow composite fiber filament is not limited to the 24 hours described above, but can also be 10h, 15h, 20h or 30h, etc. As long as the core-in-sheath hollow composite fiber filament after standing can meet the normal elasticizing on the elasticizer.

[0039] S15: After the composite filament is mixed and warped, it is subjected to a second elasticizing and then heat shaping to generate the oil storage cotton.

[0040] Optionally, the step S15 includes: feeding the composite filament into a carding machine for mixing and warping, and feeding it into the elasticizer again for a second elasticizing; feeding the elasticized composite filament into a tunnel heating pipe for heating, and then extruding and cutting it through an oil storage cotton structure mold and cooling it to room temperature to obtain the oil storage cotton.

[0041] Optionally, the temperature of the tunnel heating pipe is 140-190°C.

[0042] Optionally, the step of feeding the composite filament into a carding machine for mixing and warping and feeding it into the elasticizer again for a second elasticizing includes: feeding the composite filament into a carding machine for mixing and warping and feeding it into the elasticizer again for a second elasticizing, and setting the draft ratio of the second elasticizing to be 1.1-1.3 times and the tension ratio to be 0.6-1.2.

[0043] Exemplarily, the production and preparation method of the oil storage cotton is as follows:

[0044] First embodiment

[0045] The ambient humidity is controlled to be 30-40%;

[0046] The low-melting-point PE particles are dried at a temperature of 50°C for 24 hours, and the water content is less than 20ppm; then they are put into a mixer for stirring for 5h to obtain a mixture 1.

[0047] The high-melting-point PP resin is dried at a temperature of 60°C for 24 hours, and the water content is less than 20ppm; then it is put into a mixer for stirring for 5h to obtain a mixture 2.

[0048] The ratio of the PP material to the PE material is controlled to be 1:2.

[0049] The two mixtures are placed on a double-screw composite spinning device, and the diameter of a single filament is controlled to be 12 microns; mixture 1 is subjected to melt extrusion by a first screw and then enters an outer tube channel of the spinning machine, and the temperature is controlled to be 150°C; mixture 2 is subjected to melt extrusion by a second screw and then enters an inner tube channel of the spinning machine, enters an inner tube channel of the spinning tube, and the temperature is controlled to be 60°C; the composite fiber melt passes through a spinneret with multiple spinneret holes, is extruded through a hollow composite spinneret, and is then sent to a water tank for cold cutting; then, the composite filament is sent to a drawing frame for tension adjustment, is wound by a high-speed winding device, and a core-sheath hollow composite filament is obtained; the filament is wound into a roll, is allowed to stand for 24 hours, is sent to a texturing machine, a draw ratio of 1.2 times is set during texturing, a tension ratio is 0.7, and then double-twist texturing is performed to form a composite filament for storage.

[0050] The composite filament is placed in a carding machine for mixing and beaming, is placed in a texturing machine again for texturing, a draw ratio of 1.1 times is set during texturing, a tension ratio is 0.6, and then the filament is heated by passing through a tunnel heating pipe, is extruded and cut after passing through an oil storage cotton structure mold, the temperature of the tunnel heating pipe is 150°C, and the filament is cooled to room temperature to obtain oil storage cotton 1.

[0051] Second embodiment

[0052] The environmental humidity is controlled to be 30-40%;

[0053] The low-melting-point PE particles are subjected to drying treatment, the drying temperature is 50 degrees, the drying time is 24 hours, and the water content is less than 20 ppm; then the particles are placed in a mixer for stirring for 5 hours to obtain mixture 1.

[0054] The high-melting-point PP resin is subjected to drying treatment, the drying temperature is 60 degrees, the drying time is 24 hours, and the water content is less than 20 ppm; then the resin is placed in a mixer for stirring for 5 hours to obtain mixture 2.

[0055] The ratio of the PP material to the PE material is controlled to be 1:2.2.

[0056] The two mixtures are placed on a double-screw composite spinning device, and the diameter of a single filament is controlled to be 15 microns; mixture 1 is subjected to melt extrusion by a first screw and then enters an outer tube channel of the spinning machine, and the temperature is controlled to be 170°C; mixture 2 is subjected to melt extrusion by a second screw and then enters an inner tube channel of the spinning machine, enters an inner tube channel of the spinning tube, and the temperature is controlled to be 80°C; the composite fiber melt passes through a spinneret with multiple spinneret holes, is extruded through a hollow composite spinneret, and is then sent to a water tank for cold cutting; then, the composite filament is sent to a drawing frame for tension adjustment, is wound by a high-speed winding device, and a core-sheath hollow composite filament is obtained; the filament is wound into a roll, is allowed to stand for 24 hours, is sent to a texturing machine, a draw ratio of 1.3 times is set during texturing, a tension ratio is 1.2, and then double-twist texturing is performed to form a composite filament for storage.

[0057] The composite filament is re-entered into the carding machine for mixing and warping, and is re-entered into the elasticizer for elasticizing again. The draft ratio during elasticizing is set to 1.3 times, and the tension ratio is 0.7. Then the composite filament is heated through the tunnel heating pipe, extruded and cut after passing through the oil storage cotton structure mold, the temperature of the tunnel heating pipe is 160°C, and the composite filament is cooled to room temperature to obtain the oil storage cotton 2.

[0058] Third embodiment

[0059] The environmental humidity is controlled to be 30-40%;

[0060] The low-melting-point PE particles are dried at a drying temperature of 50 degrees for 24 hours, and the water content is less than 20 ppm. Then the particles are stirred in a mixer for 5 hours to obtain the mixture 1.

[0061] The high-melting-point PP resin is dried at a drying temperature of 60 degrees for 24 hours, and the water content is less than 20 ppm. Then the resin is stirred in a mixer for 5 hours to obtain the mixture 2.

[0062] The ratio of the PP material to the PE material is controlled to be 1:2.5.

[0063] The two mixtures are placed on a double-screw composite spinning device, and the diameter of a single filament is controlled to be 20 microns. The mixture 1 is extruded after being melted by the first screw, enters the outer pipe channel of the spinning machine, and the temperature is controlled to be 180°C. The mixture 2 is extruded after being melted by the second screw, enters the inner pipe channel of the spinning machine, and the temperature is controlled to be 70°C. The composite fiber melt passes through the spinneret plate with multiple spinneret holes, is extruded after passing through the hollow composite spinneret plate, is sent to the water tank for cold cutting, and then enters the channel. After the tension is adjusted by the godet, the high-speed winding device is used for winding to obtain the skin-core hollow composite fiber filament. The filament is wound into a roll, is placed for 24 hours, is sent to the elasticizer, the draft ratio during elasticizing is set to 1.6 times, the tension ratio is 1.4, and then the double-twist elasticizing composite is performed to form the composite filament which is wound for standby use.

[0064] The composite filament is re-entered into the carding machine for mixing and warping, and is re-entered into the elasticizer for elasticizing again. The draft ratio during elasticizing is set to 1.25 times, and the tension ratio is 1. Then the composite filament is heated through the tunnel heating pipe, extruded and cut after passing through the oil storage cotton structure mold, the temperature of the tunnel heating pipe is 150°C, and the composite filament is cooled to room temperature to obtain the oil storage cotton 3.

[0065] The oil storage cotton prepared by the above embodiments is tested and compared with the existing PET+PA6 oil storage cotton. The data of the oil storage cotton with an inner diameter of 0.5 cm, an outer diameter of 2 cm, and a height of 2.5 cm are as follows:

[0066] Cotton material Oil storage capacity Dimensional change after oil absorption for 72 hours at rest PET+PA6(1) 20 g / g 4％ PET+PA6(2) 22 g / g 5％ PP+PE(1) 18 g / g 0.8％ PP+PE(2) 19.2 g / g 1.2％ PP+PE(3) 20 g / g 1.5％

[0067] From the above, the oil storage cotton prepared by the above-mentioned embodiments has no obvious decrease in oil storage capacity compared with the existing PET+PA6 oil storage cotton, but the size change rate after oil absorption is obviously smaller.

[0068] The preparation method of the oil storage cotton provided by the application uses PP+PE composite filaments to prepare the oil storage cotton with good size stability, good oil storage rate and low cost through one elasticizing and two elasticizing and then forming after warming in an oven.

[0069] The application also provides an atomizer for an electronic cigarette, comprising the oil storage cotton, which is made by the preparation method of the oil storage cotton according to any one of the above-mentioned embodiments.

[0070] It should be understood that, although each step in the flowchart of the accompanying drawings is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or sub-steps or stages of other steps.

[0071] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments of the application can be implemented by hardware, or by means of software and necessary general hardware platform. Based on such understanding, the technical solutions of the embodiments of the application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.), and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various implementation scenarios of the embodiments of the application.

[0072] The preferred embodiments of the application are described in detail above in combination with the accompanying drawings, but the application is not limited to the specific details in the above-mentioned embodiments. The above-mentioned embodiments and the accompanying drawings are exemplary, and the modules or flows in the accompanying drawings are not necessarily necessary for implementing the embodiments of the application, and should not be understood as limiting the application. Within the technical concept of the application, various simple modifications and combinations of the technical solutions of the application can be made, and these simple modifications and combinations all belong to the protection scope of the application.

Claims

1. A method of preparing an oil storage cotton, characterized by, The method comprises the following steps: S11: After drying treatment, the PE particles are put into a mixer to be stirred uniformly to obtain a first mixture; S12: After drying treatment, the PP resin is put into a mixer to be stirred uniformly to obtain a second mixture; S13: The first mixture and the second mixture are respectively placed on a double-screw composite spinning device, and the diameter of a single filament is controlled to be 10-20 microns; S14: The first mixture and the second mixture are used to generate a skin-core hollow composite fiber filament, and the skin-core hollow composite fiber filament is subjected to a first elastic recovery to generate a composite filament; S15: The composite filament is sent into a carding machine to be mixed and beed, and is again put into an elastic recovery machine to be subjected to a second elastic recovery, and then the composite filament after the elastic recovery is sent into a tunnel heating pipe to be heated, is extruded and cut off through an oil storage cotton structure mold, and is cooled to room temperature to obtain the oil storage cotton.

2. The method for preparing the oil storage cotton according to claim 1, wherein: The step S14 comprises the following steps: The first mixture is melted and extruded through a first screw in the double-screw composite spinning device and is sent into an outer tube channel of a spinning machine, and the second mixture is melted and extruded through a second screw and is sent into an inner tube channel of the spinning machine; The composite fiber melt passes through a spinneret with multiple jet holes, is extruded through a hollow composite spinneret, and is sent into a water tank to be cooled; After tension adjustment through a godet, the skin-core hollow composite fiber filament is obtained through a high-speed winding device; The skin-core hollow composite fiber filament after the standing is sent to an elastic recovery machine to be subjected to a first elastic recovery to form the composite filament.

3. The method for preparing the oil storage cotton according to claim 1, wherein: The volume ratio of the second mixture to the first mixture is 1:2-2.

5.

4. The method for preparing the oil storage cotton according to claim 2, wherein: The step of sending the skin-core hollow composite fiber filament after the standing to the elastic recovery machine to be subjected to a first elastic recovery to form the composite filament comprises the following steps: The skin-core hollow composite fiber filament after the standing is sent to the elastic recovery machine to be subjected to a first elastic recovery, the draft multiple of the first elastic recovery is set to be 1.1-1.6 times, and the tension ratio is set to be 0.6-1.

4. The composite filament is formed through double twisting and elastic recovery.

5. The method for preparing the oil storage cotton according to claim 1, wherein: The step of sending the composite filament into a carding machine to be mixed and beeded and again putting the composite filament into the elastic recovery machine to be subjected to a second elastic recovery comprises the following steps: The composite filament is put into the carding machine to be mixed and beeded and again put into the elastic recovery machine to be subjected to a second elastic recovery, the draft multiple of the second elastic recovery is set to be 1.1-1.3 times, and the tension ratio is set to be 0.6-1.

2.

6. The method for preparing the oil storage cotton according to claim 1, wherein: The method further comprises the following steps: The PE particles and the PP resin are subjected to drying treatment, so that the water content of the PE particles and the PP resin is in a preset interval, and the preset interval is 10 mmp-20 mmp.

7. The method for preparing the oil storage cotton according to claim 2, wherein: The temperature of the first screw is controlled to be 140-190 DEG C, and the temperature of the second screw is controlled to be 50-90 DEG C.

8. The method for preparing the oil storage cotton according to claim 1, wherein: The temperature in the tunnel heating pipe is 140-190 DEG C.

9. An atomizer for an electronic cigarette, comprising an oil storage cotton, characterized in that, The oil storage cotton is made by the method for making the oil storage cotton according to any one of claims 1-8.

Images