阅读说明：本技术 一种色纺高f扁平涤纶长丝的制备方法 (Preparation method of color-spun high-F flat polyester filament yarn ) 是由 朱国英 张井东 于 2020-11-13 设计创作，主要内容包括：本发明属于面料领域,具体涉及一种色纺高F扁平涤纶长丝的制备方法,用匀速生头杆进行生头,生头杆的气源为冷冻干燥气源,丝束匀速进入上热箱并采用螺旋式环状加热,假捻器采用腾高Φ55PU盘,通过降低D/Y,减少假捻器转速,并同步增加丝束的接触面来减少单丝损伤,提高弹性,同时控制热箱的散热性,保证温度稳定性。该方法制备的长丝品质均匀,且不易产生单丝断裂和飞毛,便于后道加工。(The invention belongs to the field of fabrics, and particularly relates to a preparation method of color-spun high-F flat polyester filament, which comprises the steps of using a uniform-speed spinning rod to spin a yarn, enabling the air source of the spinning rod to be a freeze-drying air source, enabling a yarn bundle to enter an upper hot box at a uniform speed and adopting spiral annular heating, adopting a fly height phi 55PU disc for a false twister, reducing D/Y, reducing the rotating speed of the false twister, synchronously increasing the contact surface of the yarn bundle to reduce the damage of the monofilament, improving the elasticity, controlling the heat dissipation performance of the hot box and ensuring the temperature stability. The filaments prepared by the method have uniform quality, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.)

1. A preparation method of color-spun high-F flat polyester filament yarn is characterized by comprising the following steps: the process flow is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9-9.5g, the temperature of the hot box is 210 ℃, and the pressure is 0.06-0.1 MPa.

2. The method for preparing color-spun high-F flat polyester filament yarn according to claim 1, wherein the method comprises the following steps: the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

3. The method for preparing color-spun high-F flat polyester filament yarn according to claim 1, wherein the method comprises the following steps: the heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is adhered to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalizing layer.

4. The method for preparing color-spun high-F flat polyester filament yarn according to claim 3, wherein the method comprises the following steps: the heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature.

5. The method for preparing color-spun high-F flat polyester filament yarn according to claim 3, wherein the method comprises the following steps: the temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material.

Technical Field

The invention belongs to the field of fabrics, and particularly relates to a preparation method of color-spun high-F flat polyester filament yarns.

Background

With the popularization of the differentiation production technology of polyester fibers in recent years, the requirements of middle-high-end textile fabrics are difficult to meet by common conventional polyester fibers, and in the production of multi-F flat polyester yarns in the prior art, the quality of products produced in the same production line at different time periods is different, monofilament breakage is easy to occur, and the weaving generates hair, so that the softness, glossiness and elasticity of the subsequent products of customers are unsatisfactory.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a preparation method of color-spun high-F flat polyester filament, which solves the problem of poor stability of the existing polyester filament, and utilizes a nano heat-insulating layer to improve the stability of a hot box and ensure the temperature stability.

In order to achieve the technical purpose, the technical scheme of the invention is as follows:

a preparation method of color-spun high-F flat polyester filament yarn comprises the following process flows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9-9.5g, the temperature of the hot box is 210 ℃, and the pressure is 0.06-0.1 MPa.

The first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

In order to improve the heat preservation performance of the hot box, a nano heat preservation layer is pasted and covered on the inner wall of the hot box and comprises a heat insulation bottom layer and a temperature equalization layer.

Furthermore, the heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature.

The silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents.

The silica system heat-insulating coating comprises the following components in parts by mass: 5-10 parts of cage type polysilsesquioxane, 10-20 parts of ethyl silicate, 20-30 parts of methyltriethoxysilane, 10-20 parts of amino silicone resin, 20-30 parts of ethanol and 100 parts of toluene.

The preparation method of the heat insulation coating comprises the following steps:

step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene solution, wherein the stirring speed is 1000-1500 r/min;

step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 500-1000 r/min;

step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 5-10 ℃, the ultrasonic frequency is 40-80kHz, the adding speed of slow addition is 5-20mL/min, the temperature of low-temperature stirring is 10-15 ℃, and the stirring speed is 1000-2000 r/min;

and 4, adding cage type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 30-60min to obtain the heat insulation coating, wherein the temperature of the low-temperature ultrasonic dispersion is 2-8 ℃, and the ultrasonic frequency is 80-100 kHz.

The use method of the heat insulation coating comprises the following steps: uniformly spraying the heat-insulating coating on the surface of a substrate, drying at constant temperature, repeatedly spraying 20-50 times to form a prefabricated film, then spraying distilled water on the surface of the prefabricated film to form a water film, standing at constant temperature for 10-20min, heating and drying to obtain the heat-insulating coating, wherein the spraying amount of the heat-insulating coating is 20-50mL/cm²The constant temperature drying temperature is 90-100 ℃; the spraying amount of the distilled water is 2-5mL/cm²The temperature of the constant temperature standing is 80-90 ℃, the temperature of the temperature rising and drying is 130-150 ℃, the extrusion is carried out in the process of the temperature rising and drying, and the extrusion pressure is 0.4-0.7 MPa.

Furthermore, the temperature equalizing layer is formed by spraying high-thermal-conductivity coating, and the temperature equalizing layer is a porous heat conduction layer taking alumina as a heat conduction material.

The high-thermal-conductivity coating takes aluminum salt as a raw material, takes methyl silicone resin as an adhesive, and consists of a component A and a component B, wherein the component A is aluminum hydroxide gel, and the component B is methyl triethoxysilane ethanol solution.

Further, the aluminum hydroxide gel adopts an aluminum hydroxide ethanol suspension, the concentration of the aluminum hydroxide in the ethanol is 100-200g/L, and the particle size of the aluminum hydroxide is 100-200 nm.

The concentration of the methyltriethoxysilane in the component B in the ethanol is 200-500 g/L.

Furthermore, the preparation method of the nano heat-insulating layer comprises the following steps:

step a, uniformly spraying a silica heat insulation coating on a substrate, heating and drying, and repeating for 10-30 times to obtain a prefabricated heat insulation bottom layer; the spraying amount of the silica heat insulating material is 10-20g/cm²The temperature for heating and drying is 110-120 ℃;

step B, uniformly spraying the component B on the surface of the prefabricated heat insulation bottom layer, and drying at constant temperature to obtain a film, wherein the spraying amount of the component B is 2-4g/cm²(ii) a The temperature of the constant temperature drying is

Step c, uniformly spraying aluminum hydroxide gel on the surface of the film obtained in the step b, forming a prefabricated heat-insulating layer at constant temperature and constant pressure, standing for 2-4h, and performing secondary extrusion to obtain a nano heat-insulating layer, wherein the spraying amount of the aluminum hydroxide gel on the surface of the film is 5-10g/cm²The temperature of constant temperature and pressure is 80-100 ℃, the pressure is 0.2-0.4MPa, the volume content of the water vapor in the standing environment is 8-10%, the temperature is 100-120 ℃, the pressure of secondary extrusion is 0.4-0.8MPa, and the temperature is 160-200 ℃.

From the above description, it can be seen that the present invention has the following advantages:

1. the invention solves the problem of poor stability of the existing polyester filament yarn, and utilizes the nanometer heat-insulating layer to improve the stability of the hot box and ensure the temperature stability.

2. The invention utilizes the cooperation of the heat insulation bottom layer and the temperature-equalizing layer to form the nanometer heat insulation layer, and utilizes the rapid heat conduction characteristic of the surface temperature-equalizing layer to ensure the internal stability and uniformity and the filament shrinkage stability.

3. In order to solve the problem that the heat insulation bottom layer and the temperature equalization layer are easy to separate in the long-term use process of the nano heat insulation layer, stable connection is realized by adopting a cohydrolysis mode.

Detailed Description

The present invention is described in detail with reference to examples, but the present invention is not limited to the claims.

Example 1

The heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is attached to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalization layer, and the heat insulation bottom layer is attached to the inner wall of the heat box body.

The heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature; the silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents; the concrete mixture ratio is as follows: 5g of cage type polysilsesquioxane, 10g of ethyl silicate, 20g of methyltriethoxysilane, 10g of amino silicone resin, 20g of ethanol and 100g of toluene, and the preparation method comprises the following steps: the method comprises the following steps: step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene dissolved solution, wherein the stirring speed is 1000 r/min; step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 500 r/min; step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 5 ℃, the ultrasonic frequency is 40kHz, the adding speed of slow adding is 5-20mL/min, the temperature of low-temperature stirring is 10 ℃, and the stirring speed is 1000 r/min; and 4, adding the cage-type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 30min to obtain the heat-insulating coating, wherein the low-temperature ultrasonic dispersion temperature is 2 ℃, and the ultrasonic frequency is 80 kHz.

The temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material.

The process flow of the color-spun high-F flat polyester filament yarn is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9g, the temperature of a hot box is 210 ℃, and the pressure is 0.06 MPa; the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

The heat preservation that the hot box was realized to the nanometer heat preservation layer that this embodiment adopted thermal-insulated bottom and temperature-uniforming layer to constitute ensures the temperature stability of hot box, simultaneously based on the setting on temperature-uniforming layer, can reduce the temperature difference by a wide margin, through detecting, the difference in temperature of inner wall is 0.5 ℃ at the biggest, ensures that the silk bundle is heated evenly in the hot box, increases its tensile even.

The tows firstly pass through the pre-net and then enter the first drafting guide disc, so that burrs can be effectively reduced, and the tows are not easy to fluff; meanwhile, during spinning, a uniform spinning rod is used for spinning, the traditional twist stopper is replaced, the tows are not prone to flying, the number of winding turns of a guide disc combined with a leather ring type three-roller is 6, the stretching space is increased, the stretching is stable, the napping phenomenon of multi-F flat tows is reduced, and accordingly monofilament stretching breakage is reduced, and fly is produced; the diameter of a PU disc of the false twister is increased to 55mm, so that the contact radian and the length of the filament bundle and the false twister are increased, the retention time of the filament bundle in the false twister is increased, the bulkiness of the filament bundle is increased, the crimp elasticity can reach 21%, the specific fullness requirement of the chenille yarn is met, and the parameter stretching multiple is adjusted, so that the filament bundle is fully stretched, the bulkiness is improved, and the shrinkage is reduced.

The filaments prepared by the embodiment have uniform, soft and glossy quality, are rich in elasticity and stereoscopic impression, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.

Example 2

The heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is attached to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalization layer, and the heat insulation bottom layer is attached to the inner wall of the heat box body.

The heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature; the silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents; the concrete mixture ratio is as follows: 10g of cage type polysilsesquioxane, 20g of ethyl silicate, 30g of methyltriethoxysilane, 20g of amino silicone resin, 30g of ethanol and 200g of toluene, and the preparation method comprises the following steps: the method comprises the following steps: step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene dissolved solution, wherein the stirring speed is 1500 r/min; step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 1000 r/min; step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 10 ℃, the ultrasonic frequency is 80kHz, the adding speed of slow adding is 20mL/min, the temperature of low-temperature stirring is 15 ℃, and the stirring speed is 2000 r/min; and 4, adding cage type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 60min to obtain the heat-insulating coating, wherein the low-temperature ultrasonic dispersion temperature is 8 ℃, and the ultrasonic frequency is 100 kHz.

The temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material.

The process flow of the color-spun high-F flat polyester filament yarn is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9.5g, the temperature of the hot box is 210 ℃, and the pressure is 0.1 MPa; the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

The heat preservation that the hot box was realized to the nanometer heat preservation layer that this embodiment adopted thermal-insulated bottom and temperature-uniforming layer to constitute ensures the temperature stability of hot box, simultaneously based on the setting on temperature-uniforming layer, can reduce the temperature difference by a wide margin, through detecting, the difference in temperature of inner wall is 0.3 ℃ by the biggest difference in temperature, ensures that the silk bundle is heated evenly in the hot box, increases its tensile even.

The tows firstly pass through the pre-net and then enter the first drafting guide disc, so that burrs can be effectively reduced, and the tows are not easy to fluff; meanwhile, during spinning, a uniform spinning rod is used for spinning, the traditional twist stopper is replaced, the tows are not prone to flying, the number of winding turns of a guide disc combined with a leather ring type three-roller is 6, the stretching space is increased, the stretching is stable, the napping phenomenon of multi-F flat tows is reduced, and accordingly monofilament stretching breakage is reduced, and fly is produced; the diameter of the PU disc of the false twister is increased to 55mm, so that the contact radian and the length of the filament bundle and the false twister are increased, the retention time of the filament bundle in the false twister is increased, the bulkiness of the filament bundle is increased, the crimp elasticity can reach 25%, the specific fullness requirement of the chenille yarn is met, and the parameter stretching multiple is adjusted, so that the filament bundle is fully stretched, the bulkiness is improved, and the shrinkage is reduced.

The filaments prepared by the embodiment have uniform, soft and glossy quality, are rich in elasticity and stereoscopic impression, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.

Example 3

The heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is attached to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalization layer, and the heat insulation bottom layer is attached to the inner wall of the heat box body.

The heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature; the silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents; the concrete mixture ratio is as follows: 8g of cage type polysilsesquioxane, 15g of ethyl silicate, 25g of methyltriethoxysilane, 15g of amino silicone resin, 25g of ethanol and 150g of toluene, and the preparation method comprises the following steps: the method comprises the following steps: step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene dissolved solution, wherein the stirring speed is 1300 r/min; step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 800 r/min; step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 8 ℃, the ultrasonic frequency is 60kHz, the adding speed of slow adding is 10mL/min, the temperature of low-temperature stirring is 12 ℃, and the stirring speed is 1500 r/min; and 4, adding the cage-type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 50min to obtain the heat-insulating coating, wherein the low-temperature ultrasonic dispersion temperature is 6 ℃, and the ultrasonic frequency is 90 kHz.

The temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material.

The process flow of the color-spun high-F flat polyester filament yarn is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9.3g, the temperature of the hot box is 210 ℃, and the pressure is 0.08 MPa; the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

The heat preservation that the heat box was realized to the nanometer heat preservation layer that this embodiment adopted thermal-insulated bottom and temperature-uniforming layer to constitute ensures the temperature stability of heat box, simultaneously based on the setting on temperature-uniforming layer, can reduce the temperature difference by a wide margin, through detecting, the maximum difference in temperature of inner wall is 0.4 ℃, ensures that the silk bundle is heated evenly in the heat box, increases its tensile even.

The tows firstly pass through the pre-net and then enter the first drafting guide disc, so that burrs can be effectively reduced, and the tows are not easy to fluff; meanwhile, during spinning, a uniform spinning rod is used for spinning, the traditional twist stopper is replaced, the tows are not prone to flying, the number of winding turns of a guide disc combined with a leather ring type three-roller is 6, the stretching space is increased, the stretching is stable, the napping phenomenon of multi-F flat tows is reduced, and accordingly monofilament stretching breakage is reduced, and fly is produced; the diameter of a PU disc of the false twister is increased to 55mm, so that the contact radian and the length of the filament bundle and the false twister are increased, the retention time of the filament bundle in the false twister is increased, the bulkiness of the filament bundle is increased, the crimp elasticity can reach 22%, the specific fullness requirement of the chenille yarn is met, and the parameter stretching multiple is adjusted, so that the filament bundle is fully stretched, the bulkiness is improved, and the shrinkage is reduced.

The filaments prepared by the embodiment have uniform, soft and glossy quality, are rich in elasticity and stereoscopic impression, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.

Example 4

The heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is attached to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalization layer, and the heat insulation bottom layer is attached to the inner wall of the heat box body.

The heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature; the silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents; the concrete mixture ratio is as follows: 5g of cage type polysilsesquioxane, 10g of ethyl silicate, 20g of methyltriethoxysilane, 10g of amino silicone resin, 20g of ethanol and 100g of toluene, and the preparation method comprises the following steps: the method comprises the following steps: step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene dissolved solution, wherein the stirring speed is 1000 r/min; step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 500 r/min; step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 5 ℃, the ultrasonic frequency is 40kHz, the adding speed of slow adding is 5-20mL/min, the temperature of low-temperature stirring is 10 ℃, and the stirring speed is 1000 r/min; and 4, adding the cage-type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 30min to obtain the heat-insulating coating, wherein the low-temperature ultrasonic dispersion temperature is 2 ℃, and the ultrasonic frequency is 80 kHz.

The temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material. The high-thermal-conductivity coating takes aluminum salt as a raw material, takes methyl silicone resin as an adhesive, and consists of a component A and a component B, wherein the component A is aluminum hydroxide gel, and the component B is methyl triethoxysilane ethanol solution. The aluminum hydroxide gel adopts an aluminum hydroxide ethanol suspension, the concentration of aluminum hydroxide in ethanol is 100g/L, and the particle size of aluminum hydroxide is 100 nm. The concentration of the methyltriethoxysilane in the component B in ethanol is 200 g/L.

The preparation method of the rice insulating layer comprises the following steps:

step a, uniformly spraying a silica heat insulation coating on a substrate, heating and drying, and repeating for 10 times to obtain a prefabricated heat insulation bottom layer; the spraying amount of the silica heat insulation material is 10g/cm²The temperature for heating and drying is 110 ℃;

step B, uniformly spraying the component B on the surface of the prefabricated heat-insulation bottom layer, and drying at constant temperature to obtain a film, wherein the spraying amount of the component BIs 2g/cm²(ii) a The temperature of the constant temperature drying is

Step c, uniformly spraying aluminum hydroxide gel on the surface of the film obtained in the step b, forming a prefabricated heat insulation layer at constant temperature and constant pressure, standing for 2 hours, and performing secondary extrusion to obtain a nano heat insulation layer, wherein the spraying amount of the aluminum hydroxide gel on the surface of the film is 5g/cm²The temperature of constant temperature and pressure is 80 ℃, the pressure is 0.2MPa, the volume content of water vapor in the standing environment is 8%, the temperature is 100 ℃, the pressure of secondary extrusion is 0.4MPa, and the temperature is 160 ℃.

The process flow of the color-spun high-F flat polyester filament yarn is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9g, the temperature of a hot box is 210 ℃, and the pressure is 0.06 MPa; the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

The heat preservation in this embodiment adopts thermal-insulated bottom and the formation of samming layer cohydrolysis, can promote the stability of nanometer heat preservation by a wide margin, has solved thermal-insulated bottom and the problem that the samming layer in the heat preservation appears because of long-term the use, uses 1000 times repeatedly and still keeps good cohesiveness, does not discover the crackle, and does not cause the influence to the performance of monofilament.

The filaments prepared by the embodiment have uniform, soft and glossy quality, are rich in elasticity and stereoscopic impression, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.

Example 5

The heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is attached to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalization layer, and the heat insulation bottom layer is attached to the inner wall of the heat box body.

The heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature; the silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents; the concrete mixture ratio is as follows: 10g of cage type polysilsesquioxane, 20g of ethyl silicate, 30g of methyltriethoxysilane, 20g of amino silicone resin, 30g of ethanol and 200g of toluene, and the preparation method comprises the following steps: the method comprises the following steps: step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene dissolved solution, wherein the stirring speed is 1500 r/min; step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 1000 r/min; step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 10 ℃, the ultrasonic frequency is 80kHz, the adding speed of slow adding is 20mL/min, the temperature of low-temperature stirring is 15 ℃, and the stirring speed is 2000 r/min; and 4, adding cage type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 60min to obtain the heat-insulating coating, wherein the low-temperature ultrasonic dispersion temperature is 8 ℃, and the ultrasonic frequency is 100 kHz.

The temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material. The high-thermal-conductivity coating takes aluminum salt as a raw material, takes methyl silicone resin as an adhesive, and consists of a component A and a component B, wherein the component A is aluminum hydroxide gel, and the component B is methyl triethoxysilane ethanol solution. The aluminum hydroxide gel adopts an aluminum hydroxide ethanol suspension, the concentration of aluminum hydroxide in ethanol is 200g/L, and the particle size of aluminum hydroxide is 200 nm. The concentration of the methyltriethoxysilane in the component B in ethanol is 500 g/L.

The preparation method of the rice insulating layer comprises the following steps:

step a, uniformly spraying a silica heat insulation coating on a substrate, heating and drying, and repeating for 30 times to obtain a prefabricated heat insulation bottom layer; the spraying amount of the silica heat insulating material is 20g/cm²The temperature for heating and drying is 120 ℃;

step B, uniformly spraying the component B on the surface of the prefabricated heat insulation bottom layer, and drying at constant temperature to obtain a film, wherein the spraying amount of the component B is 4g/cm²(ii) a The temperature of the constant temperature drying is

Step c, uniformly spraying aluminum hydroxide gel on the surface of the film obtained in the step b, forming a prefabricated heat insulation layer at constant temperature and constant pressure, standing for 4 hours, and performing secondary extrusion to obtain a nano heat insulation layer, wherein the spraying amount of the aluminum hydroxide gel on the surface of the film is 10g/cm²The temperature of constant temperature and pressure is 100 ℃, the pressure is 0.4MPa, the volume content of water vapor in the standing environment is 10%, the temperature is 120 ℃, the pressure of secondary extrusion is 0.8MPa, and the temperature is 200 ℃.

The process flow of the color-spun high-F flat polyester filament yarn is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9.5g, the temperature of the hot box is 210 ℃, and the pressure is 0.1 MPa; the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

The insulating layer in the embodiment still maintains good cohesiveness after being repeatedly used for 2000 times, no crack is found, and the performance of the monofilament is not influenced.

The filaments prepared by the embodiment have uniform, soft and glossy quality, are rich in elasticity and stereoscopic impression, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.

Example 6

The heat box comprises a heat box body, a heat insulation layer and a heat insulation layer, wherein the heat insulation layer is attached to the inner wall of the heat box body and comprises a heat insulation bottom layer and a temperature equalization layer, and the heat insulation bottom layer is attached to the inner wall of the heat box body.

The heat insulation bottom layer is formed by spraying a silica system heat insulation coating at a constant temperature; the silicone system heat insulation coating takes cage type polysilsesquioxane as a filling material, amino silicone resin as an adhesive, methyl triethoxysilane as an auxiliary adhesive, ethyl silicate as a filling agent, and toluene and ethanol as solvents; the concrete mixture ratio is as follows: 8g of cage type polysilsesquioxane, 15g of ethyl silicate, 25g of methyltriethoxysilane, 15g of amino silicone resin, 25g of ethanol and 150g of toluene, and the preparation method comprises the following steps: the method comprises the following steps: step 1, adding methyltriethoxysilane into toluene, and uniformly stirring to form a toluene dissolved solution, wherein the stirring speed is 1300 r/min; step 2, adding ethyl silicate into ethanol, and uniformly stirring to obtain a silanol liquid; the stirring speed is 800 r/min; step 3, adding the amino silicone resin into the toluene dissolving solution, uniformly dispersing the amino silicone resin by using ultrasonic waves at a low temperature, slowly adding the silanol solution, and stirring the mixture at a low temperature until the amino silicone resin is completely dissolved to obtain a prefabricated coating; the temperature of low-temperature ultrasonic dispersion is 8 ℃, the ultrasonic frequency is 60kHz, the adding speed of slow adding is 10mL/min, the temperature of low-temperature stirring is 12 ℃, and the stirring speed is 1500 r/min; and 4, adding the cage-type polysilsesquioxane into the prefabricated coating, and performing low-temperature ultrasonic dispersion for 50min to obtain the heat-insulating coating, wherein the low-temperature ultrasonic dispersion temperature is 6 ℃, and the ultrasonic frequency is 90 kHz.

The temperature equalizing layer is formed by spraying high-heat-conductivity coating, and the temperature equalizing layer is a porous heat-conducting layer taking alumina as a heat-conducting material. The high-thermal-conductivity coating takes aluminum salt as a raw material, takes methyl silicone resin as an adhesive, and consists of a component A and a component B, wherein the component A is aluminum hydroxide gel, and the component B is methyl triethoxysilane ethanol solution. The aluminum hydroxide gel adopts an aluminum hydroxide ethanol suspension, the concentration of aluminum hydroxide in ethanol is 150g/L, and the particle size of aluminum hydroxide is 150 nm. The concentration of the methyltriethoxysilane in the component B in ethanol is 400 g/L.

The preparation method of the rice insulating layer comprises the following steps:

step a, uniformly spraying a silica heat insulation coating on a substrate, heating and drying, and repeating for 20 times to obtain a prefabricated heat insulation bottom layer; the spraying amount of the silica heat-insulating material is 15g/cm²The temperature for heating and drying is 115 ℃;

step B, uniformly spraying the component B on the surface of the prefabricated heat insulation bottom layer, and drying at constant temperature to obtain a film, wherein the spraying amount of the component B is 3g/cm²(ii) a The temperature of the constant temperature drying is

Step c, uniformly spraying aluminum hydroxide gel on the surface of the film obtained in the step b, forming a prefabricated heat insulation layer at constant temperature and constant pressure, standing for 3 hours, and performing secondary extrusion to obtain a nano heat insulation layer, wherein the spraying amount of the aluminum hydroxide gel on the surface of the film is 8g/cm²The temperature of constant temperature and pressure is 90 ℃, the pressure is 0.3MPa, the volume content of water vapor in the standing environment is 9%, the temperature is 110 ℃, the pressure of secondary extrusion is 0.6MPa, and the temperature is 180 ℃.

The process flow of the color-spun high-F flat polyester filament yarn is as follows: POY flat yarn → raw yarn tube of the filament bundle → unidirectional arrow pre-network → guide disc type first roller → upper hot box → cooling plate → false twister → guide disc type second roller → network → guide disc type auxiliary roller → lower hot box shaping → leather roller type third roller → yarn discharging yarn guide → oil tanker oil applying → winding shaping; the spinning-in is carried out by using a uniform spinning-in rod, an air source of the spinning-in rod is a freeze drying air source, tows enter an upper heating box at a uniform speed and are heated in a spiral annular mode, a fly height phi 55PU disc is adopted by a false twister, the D/Y is reduced, the rotating speed of the false twister is reduced, the contact surface of the tows is synchronously increased to reduce monofilament damage, and the elasticity is improved; when the tows pass through the leather roller type third roller, the tows are in point contact with the leather roller type third roller; the winding tension is 9.2g, the temperature of the hot box is 210 ℃, and the pressure is 0.08 MPa; the first roller, the second roller and the guide disc type auxiliary roller are guide discs, the third roller is a universal leather roller, and the tows are in point contact with the three rollers.

The insulating layer in the embodiment still keeps good cohesiveness after being repeatedly used for 1500 times, no crack is found, and the performance of the monofilament is not influenced.

The filaments prepared by the embodiment have uniform, soft and glossy quality, are rich in elasticity and stereoscopic impression, are not easy to generate monofilament fracture and fly, and are convenient for subsequent processing.

In summary, the invention has the following advantages:

1. the invention solves the problem of poor stability of the existing polyester filament yarn, and utilizes the nanometer heat-insulating layer to improve the stability of the hot box and ensure the temperature stability.

2. The invention utilizes the cooperation of the heat insulation bottom layer and the temperature-equalizing layer to form the nanometer heat insulation layer, and utilizes the rapid heat conduction characteristic of the surface temperature-equalizing layer to ensure the internal stability and uniformity and the filament shrinkage stability.

3. In order to solve the problem that the heat insulation bottom layer and the temperature equalization layer are easy to separate in the long-term use process of the nano heat insulation layer, stable connection is realized by adopting a cohydrolysis mode.

It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.