Minty cool cloud and method of making same

Abstract

The application discloses a mint cool cloud wool and a preparation method thereof, and relates to the technical field of cloud wool. In the application, the silicon dioxide loaded with a composite cool agent is used as a cool particle, and is melt-blended with PET chips to prepare a cool master batch; the modified jade powder and the cool master batch are added into the PET fiber with a silane coupling agent to form a double-stage cool enhancement effect. The hollow structure is formed by adopting the PET hollow spinning in the spinning, and the phase change material is poured into the hollow structure and is heat-pressed and fused to be sealed. The phase change material selected in the application triggers the heat absorption at a slightly high temperature in the human comfort zone due to the solid-liquid phase change mechanism, so that the prepared cloud wool achieves the effect of the variable cool, the staggered action and the long-lasting cool. In the fiber forming process, the omnibearing annular high-speed strong cold air blowing technology is adopted, the spinning melt is rapidly cooled in an instant with a very small error, and the unique crystallization state of the cloud wool which is different from other polyester fibers is caused, so that the effect of the light weight and the loft is achieved. The prepared cloud wool has the effects of the long-acting cool and the loft.

Description

Technical Field

[0001] This invention relates to the field of cloud and velvet technology, specifically to a minty cooling cloud and velvet and its preparation method. Background Technology

[0002] Cloud fleece is a completely new fiber, unlike any other. It utilizes a novel polyester production process, employing a blend of various PET polymer materials. Once processed into fleece balls, it feels incredibly soft to the touch, almost like solidified cream. When you hold it in your hands, it has a full, plump appearance. Cloud fleece can now be used as filling for many items, including cushions, blankets, plush toys, sofas, and upholstered beds.

[0003] In the field of fiber cooling functionalization, existing technologies mainly rely on a single physical cooling sensation or phase change temperature regulation mechanism: on the one hand, by adding mineral fillers such as high thermal conductivity jade powder, the rapid heat conduction characteristics are used to achieve a cooling sensation upon contact, but the cooling sensation is short-lived and easily affected by fluctuations in ambient temperature; on the other hand, microcapsules are used to encapsulate phase change materials to provide a temperature-sensitive temperature regulation effect through heat absorption during material phase change, but there is a risk of delayed cooling sensation triggering and capsule rupture failure after repeated phase changes.

[0004] By innovatively combining these two elements into a PET cloud-like structure, the limitations of traditional single-mechanism cooling technology are overcome. Jade powder, with its excellent instantaneous heat conduction capability, rapidly dissipates heat from the skin upon initial skin contact, producing an immediate cooling sensation. Meanwhile, the phase change material stably loaded within the fiber initiates phase change heat absorption when the external temperature or body heat accumulates to a specific threshold, forming a continuous temperature buffer barrier. This dual-mechanism synergy not only compensates for the deficiencies of single materials in terms of cooling timeliness and responsiveness but also, through the coupling effect of physical heat conduction and latent heat storage and release, gives the fabric a layered cooling experience: the immediate cooling sensation of the jade powder provides buffer time for the temperature control response of the phase change material, while the programmed absorption of heat by the phase change material extends the effective cooling cycle of the jade powder, forming a closed-loop cooling enhancement cycle.

[0005] Especially for structures like cloud fleece that prioritize fluffiness and softness, jade powder can optimize the thermal conduction path on the fiber surface, while phase change materials rely on the fiber carrier to achieve stable encapsulation. Together, they ensure the uniform distribution and long-lasting maintenance of coolness within the fluffy space. Ultimately, they create an adaptive cooling system in the human-clothing microenvironment that combines rapid response, continuous stability, and spatial consistency, significantly improving the dynamic thermal comfort experience in humid and hot environments. Summary of the Invention

[0006] The purpose of this invention is to provide a minty cooling cloud-like velvet and its preparation method, so as to solve the problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for preparing a minty cooling cloud-like velvet, characterized by comprising the following preparation steps:

[0008] (1) Take nano-mesoporous silica as a carrier and dry it; mix the dehydrated silica with a composite cooling agent at a mass ratio of 0.55-1.15 and impregnate it, shake and penetrate for 20-30 minutes; after the end, rotate and evaporate, and dry until no more weight loss is required to obtain cooling particles.

[0009] (2) Micron-sized jade powder was immersed in a pretreatment solution with a solid-liquid ratio of 1:10, ultrasonicated for 40 min, and then centrifuged, washed and dried to obtain modified jade powder; the modified jade powder and PET chips were melt-mixed at a mass ratio of 1:5-7, extruded, granulated and dried, with a melting temperature of 275℃ to obtain a cool-feeling masterbatch with a particle size of 2 mm.

[0010] (3) Cooling granules, cooling masterbatch and PET chips are premixed at a mass ratio of 1:0.5-0.6:10-12 for 3-5 minutes, then melt-blended in a twin-screw extruder, and spun using a ring-shaped hollow spinneret. The extruded fibers are quickly shaped by high-speed stretching and ring blowing cooling, and flow into a reciprocating machine for bin bundling. When the total denier of the bundled products reaches 600 denier, they are quickly stretched in an oil bath, and then enter a steam box for micro-stretching. The micro-stretching time is 2 seconds. The fibers are fully formed by three-dimensional crimping inside, and then enter a cutting machine. After cutting, they are placed in a three-layer oven for heat setting and then wound to obtain hollow modified PET fibers with a fineness of 2.2 dtex.

[0011] (4) The phase change material is injected into hollow modified PET fiber through vacuum injection; after injection, it is hot-pressed and cooled to obtain minty cool cloud velvet;

[0012] Furthermore, the method for preparing the composite cooling agent in step (1) is as follows: N-ethyl-L-menthylformamide and menthol lactate are melt-mixed at 45°C in a mass ratio of 3:1, and the solvent is anhydrous ethanol with a mass concentration of 250 g / L.

[0013] Furthermore, in step (2), the preferred particle size of the micron-sized jade powder is 1.5 μm.

[0014] Furthermore, in step (2), the concentration of the silane coupling agent KH-570 in the pretreatment liquid is 2wt%, and the solvent is ethanol.

[0015] Furthermore, in step (2), the outer diameter of the spinning spinneret is 245 mm and the inner diameter is 105 mm.

[0016] Furthermore, in step (3), the temperatures of the screw in zones 1, 2, 3, 4, and 5 during spinning are 270℃, 275℃, 280℃, 282℃, and 286℃, respectively.

[0017] Furthermore, in step (3), the side blowing air speed during spinning cooling is 0.8 m / s, the air humidity is 45%, the air temperature is 35℃, the distance from the spinneret is 0.8 m, the winding speed is 2800 m / min, and the winding temperature is 88-92℃.

[0018] Furthermore, the premixing temperature in step (3) is 50-60℃.

[0019] Furthermore, in step (3), the steam box temperature is 120°C and the heat setting temperature is 160°C.

[0020] Furthermore, in step (4), the vacuum degree is -0.09MPa, the temperature is 45℃, and the residence time is 60s during the injection.

[0021] Furthermore, in step (4), the temperature of the hot-press sealing roller is 150°C, the pressure is 0.15 MPa, and the contact time is 0.3s.

[0022] Furthermore, a minty cooling cloud-like material is made from cooling particles, cooling masterbatch, and PET chips.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0024] 1. This invention uses silica loaded with a composite cooling agent as cooling particles, which are melt-blended with PET chips to prepare a cooling masterbatch, achieving a slow-release effect by combining mesoporous silica; adding silane coupling agent to modify jade powder and cooling masterbatch in PET fibers effectively improves their thermal conductivity, thereby optimizing the contact cooling sensation; the instantaneous contact cooling sensation of jade powder and the composite cooling agent form a two-stage cooling enhancement effect;

[0025] 2. The spinning process utilizes hollow PET spinning to form a hollow structure, into which phase change material is injected, and hot-press sealing technology is employed to enhance the sealing strength and address the risk of leakage. The phase change material selected in this invention employs a solid-liquid phase change mechanism, enabling the prepared cloud-like fleece to absorb heat at slightly higher temperatures within the human comfort zone, achieving a variable cooling effect. Compared to the adsorption loading of existing patents, this invention utilizes a hollow fiber structure to achieve a long-lasting sealing effect. In conjunction with cooling particles, the cooling effect is activated at different temperature ranges, with alternating effects to achieve a sustained cooling sensation.

[0026] 3. During the fiber forming process, an all-round high-speed cooling air blowing technology is used to rapidly cool the spinning melt with minimal error, resulting in a unique crystalline state of cloud fleece that is different from other polyester fibers, achieving the effect of both lightweight and fluffy. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] To more clearly illustrate the method provided by the present invention, the following embodiments are provided in detail. The testing methods for various indicators of a minty cooling cloud-like velvet produced in the following embodiments are as follows:

[0029] Cooling sensation test: The cloud-like fabric was cut into 3cm×3cm pieces and tested for cooling sensation coefficient according to the test method of GB / T35263-2017 using a cooling sensation tester; the temperature of the sample stage was 20℃ and the temperature of the heat detection plate was 35℃.

[0030] Fabric cooling effect duration and phase change cooling test: Cloud fleece was cut into 40cm×40cm samples. Thirty volunteers were randomly selected and placed the fabric on their skin for 1 minute at a suitable indoor temperature of 26℃ to evaluate the cooling effect. All samples were washed 50 times using the "wash fastness tester" method in GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Vibration method". The same 30 volunteers then evaluated the cooling effect of the fabric at a suitable indoor temperature of 26℃. After running for 20 minutes to ensure a body surface temperature exceeding 37℃, the same 30 volunteers evaluated the cooling effect of the fabric again. The evaluation criteria were: 3 points (full score), 3 points for very cool, 2 points for cool, 1 point for slightly cool, and 0 points for no cooling. The total score was calculated to obtain the fabric evaluation score.

[0031] Example 1; (1) Mesoporous silica with an average particle size of 200 nm was used as a carrier and dehydrated in a vacuum drying oven at 60 °C for 2 h; N-ethyl-L-menthylformamide and menthol lactate were melt-mixed at 45 °C in a mass ratio of 3:1 to prepare a composite cooling agent, with anhydrous ethanol as the solvent and a mass concentration of 250 g / L; the dehydrated silica was mixed with the composite cooling agent at a mass ratio of 0.55 and impregnated, and the mixture was shaken at 240 rpm for 20 min; after the process, the mixture was rotary evaporated and dried at 60 °C until it no longer lost weight, thus obtaining cooling particles;

[0032] (2) Select jade powder with a particle size of 1.5 μm, immerse it in silane coupling agent KH-570 pretreatment solution with a solid-liquid ratio of 1:10, a pretreatment solution concentration of 2 wt%, and ethanol as solvent. Sonicate at 40 kHz for 40 min, then centrifuge at 8000 rpm for 10 min, wash twice with ethanol, and dry at 50 ℃ for 5 h to obtain modified jade powder. The modified jade powder and PET chips are melt-mixed at a mass ratio of 1:5 and extruded into granules at a melting temperature of 275 ℃. The masterbatch is then dried at 120 ℃ for 24 h to obtain a cool-feeling masterbatch with a particle size of 2 mm.

[0033] (3) Cooling granules, cooling masterbatch and PET chips were premixed at a mass ratio of 1:0.5:10 at 800 rpm for 3 min at a premixing temperature of 50℃. Then, they were melt-blended in a twin-screw extruder and spun using an annular hollow spinneret with an outer diameter of 245 mm and an inner diameter of 105 mm. The temperatures of the screw in zones 1, 2, 3, 4 and 5 during spinning were 270℃, 275℃, 280℃, 282℃ and 286℃, respectively. The extruded fibers were rapidly shaped by high-speed stretching and cooling by annular air blowing. The side blowing speed was 0.8 m / s and the air humidity was 45%. The air temperature is 35℃, the distance from the spinneret is 0.8m, the winding speed is 2800m / min, and the winding temperature is 88℃. The fibers flow into the reciprocating machine for bundling. When the total denier of the bundle reaches 600 denier for composite production, it is rapidly drawn through an oil bath, and then enters a steam box for micro-stretching. The steam box temperature is 120℃, and the micro-stretching time is 2s. It is fully formed in three-dimensional curling inside, and then enters the cutting machine. After cutting, it is placed in a three-layer oven for heat setting at a temperature of 160℃. The result is hollow modified PET fiber with a fineness of 2.2dtex.

[0034] (4) The phase change material prepared in Example 2 of patent CN202011417783.5 was vacuum-injected into hollow modified PE fiber. The vacuum degree was -0.09MPa, the temperature was 45℃, and the residence time was 60s. After the injection was completed, it was hot-pressed and sealed. The roller temperature was 150℃, the pressure was 0.15 MPa, the contact time was 0.3s, and finally cooled to obtain minty cool cloud velvet.

[0035] Example 2; (1) Mesoporous silica with an average particle size of 200 nm was used as a carrier and dehydrated in a vacuum drying oven at 60 °C for 2 h; N-ethyl-L-menthylformamide and menthol lactate were melt-mixed at 45 °C in a mass ratio of 3:1 to prepare a composite cooling agent, with anhydrous ethanol as the solvent and a mass concentration of 250 g / L; the dehydrated silica was mixed with the composite cooling agent at a mass ratio of 0.85 and impregnated, and the mixture was shaken at 240 rpm for 25 min; after the process, the mixture was rotary evaporated and dried at 60 °C until it no longer lost weight to obtain cooling particles;

[0036] (2) Select jade powder with a particle size of 1.5 μm, immerse it in silane coupling agent KH-570 pretreatment solution with a solid-liquid ratio of 1:10, a pretreatment solution concentration of 2 wt%, and ethanol as solvent. Sonicate at 40 kHz for 40 min, then centrifuge at 8000 rpm for 10 min, wash twice with ethanol, and dry at 50 ℃ for 5 h to obtain modified jade powder. The modified jade powder and PET chips are melt-mixed and extruded into granules at a mass ratio of 1:6. The melting temperature is 275 ℃, and the masterbatch is dried at 120 ℃ for 24 h to obtain a cool-feeling masterbatch with a particle size of 2 mm.

[0037] (3) Cooling granules, cooling masterbatch and PET chips were premixed at a mass ratio of 1:0.55:11 at 800 rpm for 4 min at a premixing temperature of 55℃. Then, they were melt-blended in a twin-screw extruder and spun using an annular hollow spinneret with an outer diameter of 245 mm and an inner diameter of 105 mm. The temperatures of the screw zones 1, 2, 3, 4 and 5 during spinning were 270℃, 275℃, 280℃, 282℃ and 286℃, respectively. The extruded fibers were rapidly shaped by high-speed stretching and cooling by annular air blowing. The side blowing speed was 0.8 m / s and the air humidity was 45. The air temperature is 35℃, the distance from the spinneret is 0.8m, the winding speed is 2800m / min, and the winding temperature is 90℃. The fibers flow into the reciprocating machine for bundling. When the total denier of the bundle reaches 600 denier for composite production, it is rapidly drawn through an oil bath, and then enters a steam box for micro-stretching. The steam box temperature is 120℃, and the micro-stretching time is 2s. It is fully formed in three-dimensional crimping inside, and then enters the cutting machine. After cutting, it is placed in a three-layer oven for heat setting at a temperature of 160℃. The resulting hollow modified PET fiber with a fineness of 2.2dtex is obtained by winding.

[0038] (4) The phase change material prepared in Example 2 of patent CN202011417783.5 was vacuum-injected into hollow modified PE fiber. The vacuum degree was -0.09MPa, the temperature was 45℃, and the residence time was 60s. After the injection was completed, it was hot-pressed and sealed. The roller temperature was 150℃, the pressure was 0.15 MPa, the contact time was 0.3s, and finally cooled to obtain minty cool cloud velvet.

[0039] Example 3; (1) Mesoporous silica with an average particle size of 200 nm was purchased from Hangzhou Xinqiao Biotechnology Co., Ltd. and dehydrated in a vacuum drying oven at 60 °C for 2 h; N-ethyl-L-menthylformamide and menthol lactate were melt-mixed at 45 °C in a mass ratio of 3:1 to prepare a composite cooling agent, with anhydrous ethanol as the solvent and a mass concentration of 250 g / L; the dehydrated silica was mixed with the composite cooling agent in a mass ratio of 1.15 and impregnated, and the mixture was shaken at 240 rpm for 30 min; after the process, the mixture was rotary evaporated and dried at 60 °C until it no longer lost weight to obtain cooling particles;

[0040] (2) Select jade powder with a particle size of 1.5 μm, immerse it in silane coupling agent KH-570 pretreatment solution with a solid-liquid ratio of 1:10, a pretreatment solution concentration of 2 wt%, and ethanol as solvent. Sonicate at 40 kHz for 40 min, then centrifuge at 8000 rpm for 10 min, wash twice with ethanol, and dry at 50 ℃ for 5 h to obtain modified jade powder. The modified jade powder and PET chips are melt-mixed at a mass ratio of 1:7 and extruded into granules at a melting temperature of 275 ℃. The masterbatch is then dried at 120 ℃ for 24 h to obtain a cool-feeling masterbatch with a particle size of 2 mm.

[0041] (3) Cooling granules, cooling masterbatch, and DuPont FC02 BK507 PET chips were premixed at 800 rpm for 5 min at a mass ratio of 1:0.6:12 and a premixing temperature of 60℃. The mixture was then melt-blended in a twin-screw extruder and spun using a ring-shaped hollow spinneret with an outer diameter of 245 mm and an inner diameter of 105 mm. The temperatures in zones 1, 2, 3, 4, and 5 of the screw during spinning were 270℃, 275℃, 280℃, 282℃, and 286℃, respectively. The extruded fibers were rapidly shaped by high-speed stretching and ring-blown cooling. The side-blown air velocity was 0.8 m / s, the air humidity was 45%, and the air temperature was... At 35℃, 0.8m from the spinneret, a winding speed of 2800m / min, and a winding temperature of 92℃, the fibers flow into a reciprocating machine for bundling. When the bundle reaches a total denier of 600 denier for composite production, it undergoes rapid stretching in an oil bath, followed by micro-stretching in a steam box at 120℃ for 2 seconds. This allows for thorough three-dimensional crimping and shaping. The fibers then enter a cutting machine, are cut, and placed in a three-layer oven for heat setting at 160℃. Finally, hollow modified PET fibers with a fineness of 2.2 dtex are obtained by winding.

[0042] (4) The phase change material prepared in Example 2 of patent CN202011417783.5 was vacuum-injected into hollow modified PE fiber. The vacuum degree was -0.09MPa, the temperature was 45℃, and the residence time was 60s. After the injection was completed, it was hot-pressed and sealed. The roller temperature was 150℃, the pressure was 0.15 MPa, the contact time was 0.3s, and finally cooled to obtain minty cool cloud velvet.

[0043] Comparative Example 1; The difference between Comparative Example 1 and Example 2 is that step (2) is omitted, and step (3) is changed to: Cooling particles and PET chips are premixed at a mass ratio of 1:11 at 800 rpm for 4 min at a premixing temperature of 55°C, and then melt-blended in a twin-screw extruder. Spinning is carried out using an annular hollow spinneret with an outer diameter of 245 mm and an inner diameter of 105 mm. During spinning, the temperatures of the screw zones 1, 2, 3, 4, and 5 are 270°C, 275°C, 280°C, 282°C, and 286°C, respectively. The extruded fibers are rapidly shaped by high-speed stretching and cooling by annular air blowing, with a side blowing speed of 0.8 m / s. The air humidity is 45%, the air temperature is 35℃, the distance from the spinneret is 0.8m, the winding speed is 2800m / min, and the winding temperature is 90℃. The fibers flow into the reciprocating machine for bundling. When the total denier of the bundle reaches 600 denier for composite production, it is rapidly drawn through an oil bath, and then enters a steam box for micro-stretching. The steam box temperature is 120℃, and the micro-stretching time is 2s. It is fully formed in three-dimensional curling inside, and then enters the cutting machine. After cutting, it is placed in a three-layer oven for heat setting at a temperature of 160℃. The fibers are then wound to obtain hollow modified PET fibers with a fineness of 2.2dtex. The remaining steps are the same as in Example 2.

[0044] Comparative Example 2; The difference between Comparative Example 2 and Example 2 is that step (1) is omitted, and step (3) is changed to: premixing the cooling masterbatch and PET chips at a mass ratio of 0.55:11 at 800 rpm for 4 min at a premixing temperature of 55°C, then melt-blending in a twin-screw extruder, and spinning using an annular hollow spinneret with an outer diameter of 245 mm and an inner diameter of 105 mm. The temperatures of the screw zones 1, 2, 3, 4, and 5 during spinning are 270°C, 275°C, 280°C, 282°C, and 286°C, respectively. The extruded fibers are rapidly shaped by high-speed stretching and cooling by annular air blowing, with a side blowing speed of 0.8 m / s. / s, humidity 45%, air temperature 35℃, distance from spinneret 0.8m, winding speed 2800m / min, winding temperature 90℃; flows into reciprocating machine for bundling, when the bundle reaches a total denier of 600 denier for composite production, it is rapidly drawn through an oil bath, and then enters a steam box for micro-stretching, the steam box temperature is 120℃, the micro-stretching time is 2s, and it is fully formed in three-dimensional crimping inside, and then enters the cutting machine for cutting, and after cutting, it is placed in a three-layer oven for heat setting, the heat setting temperature is 160℃; the hollow modified PET fiber with a fineness of 2.2dtex is obtained by winding; the remaining steps are the same as in Example 2.

[0045] Comparative Example 3; The difference between Comparative Example 3 and Example 2 is that step (4) is omitted, and step (3) is changed to: Cooling particles, cooling masterbatch and PET chips are premixed at 800 rpm for 4 min at a mass ratio of 1:0.55:11, the premixing temperature is 55℃, and then melt-blended in a twin-screw extruder. Spinning is carried out using an annular hollow spinneret with an outer diameter of 245 mm and an inner diameter of 105 mm. The temperatures of the screw zones 1, 2, 3, 4 and 5 during spinning are 270℃, 275℃, 280℃, 282℃ and 286℃, respectively. The extruded fibers are quickly shaped by high-speed stretching and ring blowing cooling. The side blowing speed is... The speed is 0.8 m / s, the humidity is 45%, the air temperature is 35℃, the distance from the spinneret is 0.8 m, the winding speed is 2800 m / min, and the winding temperature is 90℃. The fibers flow into the reciprocating machine for bundling. When the total denier of the bundle reaches 600 denier for composite production, it is rapidly drawn through an oil bath, and then enters a steam box for micro-stretching. The steam box temperature is 120℃, and the micro-stretching time is 2s. It is fully formed in three-dimensional crimping inside, and then enters the cutting machine. After cutting, it is placed in a three-layer oven for heat setting at a temperature of 160℃. The fibers are then wound to obtain a minty cool-feeling fiber with a fineness of 2.2 dtex. The remaining steps are the same as in Example 2.

[0046] Example of effect

[0047] Table 1 below presents the performance analysis results of a minty cooling cloud velvet using Examples 1 to 3 and Comparative Examples 1 to 3 of the present invention.

[0048] Table 1

[0049]

[0050] A comparison of the experimental data on the cooling sensation scores of the examples and comparative examples with the cooling sensation scores after washing reveals that adding silane coupling agent to modify jade powder and cooling masterbatch in PET fibers effectively improves their thermal conductivity, thereby optimizing the contact cooling sensation; the instantaneous contact cooling sensation of jade powder and the composite cooling agent form a two-stage cooling sensation enhancement effect; a comparison of the experimental data on the cooling sensation scores of the examples and comparative examples with the cooling sensation scores after washing reveals that the present invention uses silica loaded with composite cooling agent as cooling particles, which is melt-blended with PET chips to prepare cooling masterbatch, and combined with mesoporous silica to achieve a sustained-release ... A comparison of experimental data on the cooling sensation scores based on proportions and those based on cooling sensation scores after running reveals that the present invention uses hollow PET spinning to form a hollow structure, infuses it with phase change material, and employs hot-press sealing technology to enhance end-sealing strength and address leakage risks. The phase change material selected in this invention utilizes a solid-liquid phase change mechanism, enabling the prepared cloud-like material to absorb heat at slightly higher temperatures within the human comfort zone, achieving a variable cooling effect. Compared to the adsorption loading of existing patents, this invention utilizes a hollow fiber structure to achieve a long-lasting sealing effect. Synergistically, cooling particles activate the cooling effect at different temperature ranges, working in tandem to achieve a sustained cooling sensation.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A process for the preparation of a cool-feeling cloud of menthol, characterized in that, The method comprises the following steps: (1) taking nano-mesoporous silica as a carrier, drying and dehydrating; mixing and impregnating the dehydrated silica with 0.55-1.15 times of the mass of the composite cooling agent, oscillating for 20-30 min; after the end, rotary evaporation, drying until no weight loss, and preparing cooling particles; (2) selecting micron jade powder, immersing in a pretreatment liquid, solid-liquid ratio 1:10, ultrasonic for 40 min, then centrifugation, washing, drying to obtain modified jade powder; melting and mixing extrusion granulation drying of the modified jade powder and PET chips according to the mass ratio of 1:3-6, melting temperature is 275℃, and cooling mother particles with a particle size of 2mm are prepared; (3) premixing the cooling particles, cooling mother particles and PET chips according to the mass ratio of 1:0.5-0.6:10-12 for 3-5 min, then melt blending in a double screw extruder, spinning by using a ring hollow spinneret, and after the fiber is sprayed, the fiber is quickly shaped by high speed stretching and ring blowing cold reduction, flows into a reciprocating machine for barrel collection and bundling, when the total denier of the bundle reaches 600 denier, the fiber is quickly drawn through an oil bath, then enters a steam box for micro stretching, the micro stretching time is 2s, and the fiber is fully shaped by three-dimensional crimping in the interior, then enters a cutting machine, and after cutting, the fiber is placed in a three-layer oven for heat setting, and a hollow modified PET fiber with a fineness of 2.2dtex is obtained; (4) filling the phase change material into the hollow modified PET fiber by vacuum filling; after the filling is completed, heat sealing, cooling to prepare mint cooling cloud wool.

2. The method for preparing a minty cooling cloud-like velvet according to claim 1, characterized in that, The preparation method of the composite cooling agent in step (1) is as follows: melting and mixing N-ethyl-L-menthyl formamide and menthol lactate according to the mass ratio of 3:1 at 45℃ to prepare the composite cooling agent, the solvent is anhydrous ethanol, and the mass concentration is 250g / L.

3. The method for preparing a minty cooling cloud-like velvet according to claim 1, characterized in that, The particle size of the micron jade powder in step (2) is 1.5μm.

4. The method for preparing a minty cooling cloud-like velvet according to claim 1, characterized in that, The concentration of the pretreatment liquid silane coupling agent KH-570 in step (2) is 2wt%, and the solvent is ethanol.

5. The method for preparing a minty cooling cloud-like velvet according to claim 1, characterized in that, The outer diameter of the spinning spinneret in step (2) is 245mm, and the inner diameter is 105mm.

6. The method for preparing a minty cooling cloud-like velvet according to claim 1, characterized in that, The screw 1 zone, 2 zone, 3 zone, 4 zone and 5 zone temperatures during spinning in step (3) are 270℃, 275℃, 280℃, 282℃ and 286℃ respectively.

7. The method for preparing a minty cooling cloud-like velvet according to claim 1, characterized in that, The side blowing air speed during spinning cooling in step (3) is 0.8m / s, the air humidity is 45%, the air temperature is 35℃, the distance from the spinneret is 0.8m, and the winding speed is 2800m / min, and the winding temperature is 88-92℃.

8. The method of claim 1, wherein the minty cool cloud fabric is prepared by the steps of: The premixing temperature in step (3) is 50-60℃.

9. The method of claim 1, wherein the minty cool cloud fabric is prepared by the steps of: The steam box temperature in step (3) is 120℃, and the heat setting temperature is 160℃.

10. The method of claim 1, wherein the minty cool cloud fabric is prepared by the steps of: The vacuum degree during filling in step (4) is-0.09MPa, the temperature is 45℃, and the residence time is 60s.

11. The method of claim 1, wherein the minty cool cloud fabric is prepared by the steps of: The heat sealing roller temperature in step (4) is 150℃, the pressure is 0.15MPa, and the contact time is 0.3s.

12. A cooling cloud of mint, characterized in that, The method is prepared according to any one of claims 1-11.

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