Process for producing air-bent curved wire

Abstract

The application discloses a kind of air-variable curly straw production processes, process includes air-variable stage and cooling and shaping stage, as follows: air-variable stage: straw enters air-variable equipment, heating straw, compressed air is passed into air-variable pipe, and make straw form curved shape;Cooling and shaping stage: after curved straw leaves hole air-variable equipment, to straw is carried out fog cooling, then again carries out air cooling, make straw rapid cooling, shrink, eliminate the internal stress of straw, finally winding, after winding straw is placed in low-temperature constant temperature environment and stores, wherein, fog cooling temperature is 5-15 DEG C, air cooling temperature is 10-15 DEG C, the temperature of low-temperature constant temperature environment is 15-20 DEG C.The curly degree of straw prepared by the application is stable, and the curly degree attenuation is small.

Description

Technical Field

[0001] This invention belongs to the field of artificial grass fiber technology, specifically relating to a process for producing air-variable curved fibers. Background Technology

[0002] Air-textured filament, also known as air-deformed filament, refers to a processing method that uses compressed air jets to treat long filaments, giving them a fluffy texture and some properties similar to staple fiber yarn. In the artificial turf production industry, air-textured filament technology can produce irregularly curled, fluffy artificial turf filaments. However, the curl of filaments produced by existing processes is unstable, and after long-term storage, the curl of the filaments significantly decreases, gradually returning to its original straighter state. Currently, the control of filament curl is only achieved by controlling air-textured parameters, such as air-textured temperature and compressed air intake, but the problem of significant curl decrease remains unresolved. Therefore, it is necessary to propose a new air-textured filament production process. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the purpose of this invention is to provide an air-variable filament production process that produces grass filaments with stable crimp and minimal crimp decay.

[0004] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows:

[0005] An air-cooled curved wire production process includes an air-cooling stage and a cooling and shaping stage, as follows:

[0006] Air conversion stage: The straw enters the air conversion equipment, the straw is heated, and compressed air is introduced into the air conversion pipe to make the straw form a curved shape;

[0007] Cooling and shaping stage: After the bent grass fibers leave the air-cooling device inside the hole, the grass fibers are mist-cooled and then air-cooled to rapidly cool and shrink the grass fibers, eliminate the internal stress of the grass fibers, and finally roll them up. The rolled grass fibers are then placed in a low-temperature constant temperature environment for storage. The mist-cooling temperature is 5-15℃, the air-cooling temperature is 10-15℃, and the temperature of the low-temperature constant temperature environment is 15-20℃.

[0008] Preferably, for producing grass fibers with low curvature, the temperature of mist cooling is 10-12℃, and the residence time of the grass fibers in the mist cooling environment is 20-40s; the temperature of air cooling is 13-15℃, and the residence time of the grass fibers in the air cooling environment is 30-45s.

[0009] For straw fibers with medium curvature in production, the temperature for mist cooling is 8-10℃, and the residence time of the straw fibers in the mist cooling environment is 20-40s; the temperature for air cooling is 13-15℃, and the residence time of the straw fibers in the air cooling environment is 30-45s.

[0010] For producing high-curvature grass fibers, the temperature for mist cooling is 5–8℃, and the grass fibers remain in the mist-cooled environment for 20–40 seconds. The temperature for air cooling is 10–12℃, and the grass fibers remain in the air-cooled environment for 30–45 seconds.

[0011] Preferably, during the air-cooling stage, the diameter of the air-cooling tube is 6–25 mm, and the compressed air intake volume is 30–120 cm³. 3 / s, air temperature ranges from 130 to 260℃.

[0012] More preferably, for producing grass fibers with low curvature, during the air-cooling stage, the diameter of the air-cooling pipe is 19-25mm, and the compressed air intake volume is 30-60cm³. 3 / s, air temperature is 130-180℃;

[0013] For grass fibers with a certain curvature during production, the air compressor tube diameter is 10-18mm and the compressed air intake volume is 60-90cm³ during the air compressor stage. 3 / s, air temperature range is 180-220℃;

[0014] For producing high-curvature straw fibers, during the air-cooling stage, the air-cooling tube diameter is 6-10mm, and the compressed air intake volume is 90-120cm³. 3 / s, air temperature is 220-260℃.

[0015] Preferably, during the cooling and setting stage, the winding tension is 600–1000 cN.

[0016] More preferably, for grass filaments with low curvature, the winding tension is 900–1000 cN; for grass filaments with medium curvature, the winding tension is 750–850 cN; and for grass filaments with high curvature, the winding tension is 600–700 cN.

[0017] Preferably, the cross-sectional shape of the grass fibers includes any one of the following: planar, rhomboid, elliptical, wavy, U-shaped, and W-shaped.

[0018] More preferably, the cross-sectional shape of low-curvature grass fibers is wavy, U-shaped, or W-shaped, the cross-sectional shape of medium-curvature grass fibers is rhomboid or elliptical, and the cross-sectional shape of high-curvature grass fibers is planar or near-planar.

[0019] Preferably, the raw materials for the straw fiber formulation include polyethylene, polypropylene, coloring masterbatch, processing aids, and filler masterbatch.

[0020] More preferably, the raw materials for producing low-curvature grass fibers, calculated by mass parts, are: 0-10 parts polyethylene, 90-100 parts polypropylene, 4-10 parts coloring masterbatch, 1-3 parts processing aids, and 1-3 parts filler masterbatch.

[0021] The raw materials for producing medium-curvature grass fibers, calculated by mass parts, are: 15-25 parts polyethylene, 75-85 parts polypropylene, 4-10 parts coloring masterbatch, 1-3 parts processing aids, and 1-3 parts filler masterbatch.

[0022] The raw materials for producing high-curvature grass fibers, calculated by weight, are: 30-40 parts polyethylene, 60-70 parts polypropylene, 4-10 parts coloring masterbatch, 2-5 parts processing aids, and 1-3 parts filler masterbatch.

[0023] Beneficial effects:

[0024] This invention proposes specific production parameters for low-curvature, medium-curvature, and high-curvature grass fibers. By forming curved grass fibers in one step, the stress caused by the air-forming of the grass fibers is eliminated in the cooling and shaping stage through low-temperature constant temperature, mist cooling, and air cooling in sequence. The grass fibers produced by this invention have a curvature of 20-80%, and the curvature is stable. With the increase of storage time, the curvature decreases little. After more than three months of storage, the curvature decreases by less than or equal to 10%. Detailed Implementation

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, specific implementation methods of the present invention will be described below. Obviously, the following description is merely some embodiments of the present invention; those skilled in the art can obtain other implementation methods based on these embodiments without creative effort.

[0026] This invention provides an air-varying curvature fiber production process that can provide corresponding parameter control for products with low curvature (30-40%), medium curvature (40-50%), and high curvature (50-60%), reducing significant attenuation of the straw fibers during storage. Specifically, the process includes an air-varying stage and a cooling and shaping stage, as follows:

[0027] Air conversion stage: The straw enters the air conversion equipment, the straw is heated, and compressed air is introduced into the air conversion pipe to make the straw form a curved shape;

[0028] Cooling and shaping stage: After the bent grass fibers leave the air-cooling device inside the hole, the grass fibers are mist-cooled and then air-cooled to rapidly cool and shrink the grass fibers, eliminate the internal stress of the grass fibers, and finally roll them up. The rolled grass fibers are then placed in a low-temperature constant temperature environment for storage.

[0029] In this invention, during the air-cooling stage, the diameter of the air-cooling tube is 6–25 mm, and the compressed air intake volume is 30–120 cm³. 3 / s, with an air-cooling temperature of 130–260℃. Specifically, the parameters in the air-cooling stage vary depending on the curvature of the grass fibers being produced.

[0030] For producing low-curvature grass fibers, during the air-cooling stage, the diameter of the air-cooling tube can be selected as 19-25mm, preferably 23mm; the compressed air intake volume is 30-60cm³. 3 / s, preferably 45cm 3 / s; air temperature range 130-180℃, preferably 150℃.

[0031] For producing grass fibers with a medium curvature, during the air-cooling stage, the diameter of the air-cooling tube can be selected as 10-18mm, preferably 15mm; the compressed air intake volume is 60-90cm³. 3 / s, preferably 80cm 3 / s; air temperature range 180-220℃, preferably 190℃.

[0032] For producing highly curved straw fibers, the diameter of the air-cooling tube during the air-cooling stage can be 6-10mm, preferably 8mm; the compressed air intake volume should be 90-120cm³. 3 / s, preferably 110cm 3 / s; air temperature range 220-260℃, preferably 240℃.

[0033] In this invention, the straw fibers after the air-cooling stage need to undergo mist cooling and air cooling sequentially, and finally be stored in a low-temperature constant-temperature environment. The mist cooling and air cooling temperatures differ for straw fibers with different curvatures, which is related to the air-cooling temperature of the air-cooling stage, as follows:

[0034] Compared to existing air-curved straw production processes, this invention adds a cooling and shaping stage. By using mist cooling and air cooling on the straw fibers, internal stress is eliminated to control the curvature of the fibers. Immediately after the air-curving stage, the straw fibers are mist-cooled at a temperature of 5–15°C, which quickly removes heat. Air cooling is then applied to further cool the straw fibers and simultaneously eliminate water droplets condensed on the surface during mist cooling, preventing residual water. The air cooling temperature is 10–15°C. The straw fibers are stored in a low-temperature, constant-temperature environment to prevent the influence of ambient temperature changes on the curvature of the straw fibers. In this invention, the constant-temperature environment is 15–20°C.

[0035] It should be noted that during the cooling and shaping stage, the temperatures of the mist cooling environment, air cooling environment, and low-temperature constant temperature environment vary depending on the curvature of the grass fibers being produced.

[0036] Specifically, for producing low-curvature straw fibers, the temperature of mist cooling is 10-12℃, and the residence time of the straw fibers in the mist cooling environment is 20-40s, preferably 30s; the temperature of air cooling is 13-15℃, and the residence time of the straw fibers in the air cooling environment is 30-45s, preferably 40s; the temperature of the constant temperature environment is 15-20℃, preferably 20℃.

[0037] For the production of grass fibers with medium curvature, the temperature of mist cooling is 8-10℃, and the residence time of the grass fibers in the mist cooling environment is 20-40s, preferably 30s; the temperature of air cooling is 13-15℃, and the residence time of the grass fibers in the air cooling environment is 30-45s, preferably 40s; the temperature of the constant temperature environment is 15-20℃, preferably 20℃.

[0038] For producing high-curvature straw fibers, the temperature of mist cooling is 5-8℃, and the residence time of the straw fibers in the mist cooling environment is 20-40s, preferably 30s; the temperature of air cooling is 10-12℃, and the residence time of the straw fibers in the air cooling environment is 30-45s, preferably 40s; the temperature of the constant temperature environment is 15-20℃, preferably 20℃.

[0039] It should be noted that the "low temperature" in the low-temperature constant temperature environment of this invention is in comparison with the temperature during the air-conditioning stage. The temperature of the constant temperature environment of this invention is 15-20°C. Its function is to provide a low and constant temperature storage environment, avoiding the influence of temperature changes in the storage environment on the curvature of the straw fibers. During storage, the final temperature of the straw fibers will drop to 15-20°C, and the internal stress will eventually be eliminated. It is easy to understand that if the storage environment temperature increases, the curvature of the straw fibers will decrease more rapidly.

[0040] Furthermore, this invention improves the winding tension during the cooling and setting stage. The winding tension is related to the amount of straw yarn taken up by the yarn bobbin. Higher winding tension results in greater stretching of the straw yarn by the bobbin, leading to tighter winding and increased material take-up, but also more severe straw deformation. Conversely, lower winding tension results in less stretching of the straw yarn by the bobbin, looser winding, and reduced material take-up. This invention proposes different winding tensions to accommodate straw yarns with different curvatures. Combined with mist-cooling / air-cooling temperatures and low-temperature constant-temperature storage during the cooling and setting stage, it can minimize the attenuation of straw yarn curvature while maximizing material take-up, as detailed below:

[0041] For grass fibers with low curvature, the winding tension is 900-1000 cN, preferably 1000 cN;

[0042] For grass fibers with medium curvature, the winding tension is 750–850 cN, preferably 800 cN;

[0043] For highly curved grass fibers, the winding tension is 600–700 cN, preferably 600 cN.

[0044] For grass fibers with higher curvature, the winding tension should be lower to avoid reducing the curvature of the grass fibers.

[0045] The cross-sectional shapes of straw fibers include planar, rhomboid, elliptical, wavy, U-shaped, and W-shaped. In this invention, in addition to controlling the process parameters during the air-forming and cooling-setting stages, the shape of the straw fibers can also be controlled. Combined with the control parameters in the production process, this can slow down the decay of the straw fiber curvature. Different shaped straw fibers have inconsistent support properties. Regularly shaped straw fibers are easily air-formed into curved fibers, and after air-forming, the straw fibers have relatively large deformation and high curvature, making them suitable for producing high-curvature curved fibers. Irregularly shaped straw fibers have relatively small deformation after air-forming, and the curvature is slightly lower, making them suitable for producing low-curvature curved fibers, as detailed below:

[0046] The cross-sectional shape of low-curvature grass fibers is wavy, U-shaped, or W-shaped; the cross-sectional shape of medium-curvature grass fibers is rhomboid or elliptical; and the cross-sectional shape of high-curvature grass fibers is planar or near-planar.

[0047] In this invention, the raw materials for the straw fibers include polyethylene, polypropylene, coloring masterbatch, processing aids, and filler masterbatch. Based on controlling the process parameters during the air-spinning and cooling-setting stages, a suitable straw fiber formulation also helps to delay the decline in straw fiber curvature, as detailed below:

[0048] The raw materials for producing low-curvature grass fibers, calculated by weight, are: 0-10 parts polyethylene, 90-100 parts polypropylene, 4-10 parts coloring masterbatch, 1-3 parts processing aids, and 1-3 parts filler masterbatch.

[0049] The raw materials for producing medium-curvature grass fibers, calculated by mass parts, are: 15-25 parts polyethylene, 75-85 parts polypropylene, 4-10 parts coloring masterbatch, 1-3 parts processing aids, and 1-3 parts filler masterbatch.

[0050] The raw materials for producing high-curvature grass fibers, calculated by weight, are: 30-40 parts polyethylene, 60-70 parts polypropylene, 4-10 parts coloring masterbatch, 2-5 parts processing aids, and 1-3 parts filler masterbatch.

[0051] It should be noted that the amount of polypropylene and polyethylene used is related to the curvature of the filament. For high-curvature filaments, where high curvature is required, appropriately increasing the amount of polyethylene and / or decreasing the amount of polypropylene reduces the strength and rigidity of the filaments, making them softer and easier to bend. After the air-curving and cooling-setting stages, the curvature of the filaments will increase accordingly, making it easier to produce high-curvature filaments. Similarly, for low-curvature filaments, decreasing the amount of polyethylene and / or increasing the amount of polypropylene results in filaments with relatively higher strength and rigidity, making them harder and less prone to bending. After the air-curving and cooling-setting stages, the curvature of the filaments will decrease accordingly, making it easier to produce low-curvature filaments.

[0052] This invention allows for minute adjustments to the curvature of the curled filaments by controlling a single processing condition, such as product formulation, filament shape, air-cooled tube diameter, air-cooled temperature, compressed air intake, and winding tension. By simultaneously controlling multiple processing conditions, the curvature of the curled filaments can be significantly adjusted.

[0053] For example, if the curvature of the straw is slightly too high, when it is necessary to reduce the curvature, the straw formula can be adjusted by increasing the amount of polypropylene, decreasing the amount of polyethylene, and / or increasing the winding pressure; if the curvature of the straw is slightly too low, when it is necessary to increase the curvature, the straw formula can be adjusted by decreasing the amount of polypropylene, increasing the amount of polyethylene, and / or decreasing the winding tension.

[0054] If the curvature of the grass fibers is significantly too large, the curvature can be reduced by increasing the diameter of the air transformer tube, lowering the air transformer temperature, and reducing the compressed air intake. If the curvature of the grass fibers is significantly too small, the curvature can be increased by decreasing the diameter of the air transformer tube, increasing the air transformer temperature, and reducing the compressed air intake.

[0055] This invention proposes specific production parameters for low-curvature, medium-curvature, and high-curvature grass fibers. By forming curved grass fibers in one step, the internal stress caused by the air-cooling, air-cooling, and low-temperature constant-temperature storage during the cooling and shaping stage is eliminated. The grass fibers produced by this invention have a curvature of 20-80%, and the curvature is stable. With the increase of storage time, the curvature decreases little, and the curvature decrease is less than or equal to 10% after storage for more than three months.

[0056] The technical solution of the present invention will be described in detail below with specific embodiments.

[0057] Example 1

[0058] In this embodiment, low-curvature grass fibers are produced. The grass fiber formula, calculated by mass parts, is: 5 parts polyethylene, 95 parts polypropylene, 6 parts coloring masterbatch, 2 parts processing aids, and 2 parts filler masterbatch.

[0059] Air-cooling stage: The straw enters the air-cooling equipment, where it is heated. Compressed air is then introduced into the air-cooling pipe, causing the straw to bend into a curved shape. The diameter of the air-cooling pipe is 23mm; the compressed air intake volume is 45cm³. 3 / s; the air temperature is 150℃;

[0060] Cooling and shaping stage: After the bent straw leaves the air-cooling device inside the hole, the straw is mist-cooled and then air-cooled to rapidly cool and shrink the straw, eliminating the internal stress of the straw. Finally, it is wound up and stored in a low-temperature constant temperature environment. The mist-cooling temperature is 12℃ and the residence time is 30 seconds, while the air-cooling temperature is 15℃ and the residence time is 40 seconds. The storage temperature in the low-temperature constant temperature environment is 20℃, and the winding tension is 1000cN.

[0061] Example 2

[0062] In this embodiment, the medium curvature grass fiber is produced. The grass fiber formula, calculated by mass parts, is: 20 parts polyethylene, 80 parts polypropylene, 6 parts coloring masterbatch, 2 parts processing aids, and 1.5 parts filler masterbatch.

[0063] Air-cooling stage: The straw enters the air-cooling equipment, where it is heated. Compressed air is then introduced into the air-cooling pipe, causing the straw to bend into a curved shape. The diameter of the air-cooling pipe is 23mm; the compressed air intake volume is 45cm³. 3 / s; the air temperature is 150℃;

[0064] Cooling and shaping stage: After the bent straw leaves the air-cooling device inside the hole, the straw is mist-cooled and then air-cooled to rapidly cool and shrink the straw, eliminating the internal stress of the straw. Finally, it is wound up and stored in a low-temperature constant temperature environment. The mist-cooling temperature is 8℃ and the residence time is 30 seconds, while the air-cooling temperature is 13℃ and the residence time is 40 seconds. The storage temperature in the low-temperature constant temperature environment is 20℃ and the winding tension is 800cN.

[0065] Example 3

[0066] In this embodiment, high-curvature grass fibers are produced. The grass fiber formula, calculated by mass parts, is: 30 parts polyethylene, 70 parts polypropylene, 6 parts coloring masterbatch, 3 parts processing aids, and 1 part filler masterbatch.

[0067] Air-cooling stage: The straw enters the air-cooling equipment, where it is heated. Compressed air is then introduced into the air-cooling pipe, causing the straw to bend into a curved shape. The diameter of the air-cooling pipe is 23mm; the compressed air intake volume is 45cm³. 3 / s; the air temperature is 150℃;

[0068] Cooling and shaping stage: After the bent straw leaves the air-cooling device inside the hole, the straw is mist-cooled and then air-cooled to rapidly cool and shrink the straw, eliminating the internal stress of the straw. Finally, it is wound up and stored in a low-temperature constant temperature environment. The mist-cooling temperature is 6℃ and the residence time is 30 seconds, while the air-cooling temperature is 10℃ and the residence time is 40 seconds. The storage temperature in the low-temperature constant temperature environment is 20℃, and the winding tension is 800cN.

[0069] Comparative Example 1

[0070] The low-curvature grass fiber, by weight, has the following formulation: 5 parts polyethylene, 95 parts polypropylene, 6 parts coloring masterbatch, 2 parts processing aids, and 2 parts filler masterbatch.

[0071] Air-cooling stage: The straw enters the air-cooling equipment, where it is heated. Compressed air is then introduced into the air-cooling pipe, causing the straw to bend into a curved shape. The diameter of the air-cooling pipe is 20mm; the compressed air intake volume is 50cm³. 3 / s; the air temperature is 160℃;

[0072] Store at room temperature with a winding tension of 1000cN.

[0073] Comparative Example 2

[0074] Medium curvature grass fibers, by weight, have the following formulation: 15 parts polyethylene, 85 parts polypropylene, 6 parts coloring masterbatch, 2 parts processing aids, and 2 parts filler masterbatch.

[0075] Air-cooling stage: The straw enters the air-cooling equipment, where it is heated. Compressed air is then introduced into the air-cooling pipe, causing the straw to bend into a curved shape. The diameter of the air-cooling pipe is 15mm; the compressed air intake volume is 80cm³. 3 / s; the air temperature is 200℃;

[0076] Store at room temperature with a winding tension of 750cN.

[0077] Comparative Example 3

[0078] The high-curvature grass fiber, by weight, has the following formulation: 25 parts polyethylene, 75 parts polypropylene, 6 parts coloring masterbatch, 3 parts processing aids, and 1 part filler masterbatch.

[0079] Air-cooling stage: The straw enters the air-cooling equipment, heats the straw, and compressed air is introduced into the air-cooling pipe to make the straw into a curved shape. The diameter of the air-cooling pipe is 8.5 mm; the compressed air intake is 100 cm3 / s; and the air-cooling temperature is 240℃.

[0080] Store at room temperature with a winding tension of 600cN.

[0081] The curvature of the straw fibers obtained in Examples 1-3 and Comparative Examples 1-3 was measured on days 1, 3, 5, 10, 20, 30, 60, and 90. The testing method is as follows:

[0082] S1. Insert the straw yarn bobbin to be tested into the spindle bar of the yarn spinning instrument;

[0083] S2. Pull the curved yarn on the yarn tube into the yarn guide hook, around the tension regulator, through the transverse yarn guide hook, and finally fasten the end of the curved yarn to the yarn clamping piece of the yarn frame to complete the yarn threading.

[0084] S3. Manually set the required number of yarn turns on the counter on the yarn winding machine control panel;

[0085] S4. Adjust the yarn thread frame rotation speed to 60r / min-80r / min;

[0086] S5. Press the manual reset button to reset the number of winding turns on the counter to zero;

[0087] S6. Press the yarn start button. Yarn threading will proceed automatically. Yarn threading will stop automatically when the set number of yarn turns is reached.

[0088] S7. After the yarn is spun, cut the grass fibers at the fixed position (where the yarn is clamped), connect the ends of the curved fibers with tape, and form a closed and complete grass yarn loop.

[0089] S8. Lower the leaf with the yarn clamp on the yarn frame inward to remove the yarn frame leaf, remove the spun grass fibers, and then reset the yarn frame leaf.

[0090] S9. Pass the removed straw yarn ring through a wooden stick and place it in a precision drying oven at 75℃ for 2 minutes.

[0091] S10. When the set time is up, take out the straw, cut the straw at one end of the tape with scissors, place the cut straw vertically on a ruler, measure the length of the straw, and calculate the curvature (Calculation method: Curvature = (100 - measured straw length) * 100%).

[0092] The experimental results of Examples 1-3 and Comparative Examples 1-3 are shown in the table below:

[0093] Table 1. Test results of Examples 1-3 and Comparative Examples 1-3

[0094]

[0095] The embodiments provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention, and the descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A process for producing a space-variant serpentine, characterized in that, The process comprises an air-variable stage and a cooling and setting stage, as follows: The air-variable stage: the grass silk enters the air-variable equipment, heats the grass silk, and makes the grass silk form a curved shape by introducing the compressed air into the air-variable pipe, wherein the diameter of the air-variable pipe is 6-25 mm, the air inlet amount of the compressed air is 30-120 cm 3 / s, and the air-variable temperature is 130-260 ℃. Cooling and setting stage: after the curved straw leaves the air-variable device in the hole, the straw is subjected to mist cooling, and then air cooling, so as to rapidly cool and shrink the straw, eliminate the internal stress of the straw, and finally wind up the straw, and store the wound-up straw in a low-temperature constant-temperature environment, wherein the mist cooling temperature is 5-15℃, the air cooling temperature is 10-15℃, the temperature of the low-temperature constant-temperature environment is 15-20℃, and the winding tension is 600-1000 cN; For the production of low-curvature straw, the mist cooling temperature is 10-12℃, the straw stays in the mist cooling environment for 20-40 s, the air cooling temperature is 13-15℃, and the straw stays in the air cooling environment for 30-45 s; For the production of medium-curvature straw, the mist cooling temperature is 8-10℃, the straw stays in the mist cooling environment for 20-40 s, the air cooling temperature is 13-15℃, and the straw stays in the air cooling environment for 30-45 s; For the production of high-curvature straw, the mist cooling temperature is 5-8℃, the straw stays in the mist cooling environment for 20-40 s, the air cooling temperature is 10-12℃, and the straw stays in the air cooling environment for 30-45 s.

2. The air-variant coiled wire production process of claim 1, wherein, For producing low-camber grass, the air-variable tube diameter is 19-25 mm, the compressed air intake is 30-60 cm 3 / s, and the air-variable temperature is 130-180℃. For the production of the grass wire with the medium curvature, in the air-variable stage, the air-variable tube diameter is 10-18 mm, the compressed air intake is 60-90 cm 3 / s, and the air-variable temperature is 180-220℃. For producing high-camber grass wire, the air-variable tube diameter is 6-10 mm, the compressed air intake is 90-120 cm 3 / s, and the air-variable temperature is 220-260℃.

3. The air variant serpentine production process of claim 1, wherein, For low-curvature straw, the winding tension is 900-1000 cN; for medium-curvature straw, the winding tension is 750-850 cN; and for high-curvature straw, the winding tension is 600-700 cN.

4. The process for producing a space variant serpentine according to any one of claims 1-3, characterized in that, The cross-sectional shape of the straw includes any one of a planar shape, a rhombic shape, an elliptical shape, a wavy shape, a U-shaped and a W-shaped.

5. The air variant coiled wire production process of claim 4, wherein, The cross-sectional shape of low-curvature straw is a wavy shape, a U-shaped or a W-shaped, the cross-sectional shape of medium-curvature straw is a rhombic shape or an elliptical shape, and the cross-sectional shape of high-curvature straw is a planar shape or a planar-like shape.

6. The process for producing a space variant serpentine according to any one of claims 1-3, wherein, The raw materials of the straw include polyethylene, polypropylene, coloring master batch, processing aid and filling master batch.

7. The air variant coiled wire production process of claim 6, wherein, For the production of low-curvature straw, the raw materials are 0-10 parts of polyethylene, 90-100 parts of polypropylene, 4-10 parts of coloring master batch, 1-3 parts of processing aid and 1-3 parts of filling master batch by mass fraction; For the production of medium-curvature straw, the raw materials are 15-25 parts of polyethylene, 75-85 parts of polypropylene, 4-10 parts of coloring master batch, 1-3 parts of processing aid and 1-3 parts of filling master batch by mass fraction; For the production of high-curvature straw, the raw materials are 30-40 parts of polyethylene, 60-70 parts of polypropylene, 4-10 parts of coloring master batch, 2-5 parts of processing aid and 1-3 parts of filling master batch by mass fraction.

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