High-strength high-temperature-resistant polypropylene filament geotextile as well as preparation method and application thereof
By introducing calcium carbonate masterbatch and anti-aging agent into polypropylene filament geotextile, the molecular structure is changed, and high-strength, high-temperature resistant polypropylene filament geotextile is prepared, solving the problem of structural damage at high temperatures and achieving structural stability and excellent mechanical properties at 180℃.
Patent Information
- Application Number
- CN202511453020.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2025-12-09
AI Technical Summary
Existing polypropylene filament geotextiles are prone to structural damage under high-temperature asphalt spraying, leading to a decline in project quality and lifespan.
High-strength, high-temperature resistant polypropylene filament geotextiles are prepared by using calcium carbonate masterbatch and anti-aging agents as raw materials and through processes such as twin-screw extrusion melting, melt filtration, spinning, cooling stretching, and needle punching reinforcement. This process modifies the molecular structure of polypropylene and improves its high-temperature resistance.
It maintains structural integrity at 180℃, meets the requirements of highway engineering, and has excellent mechanical properties and high temperature resistance, with all indicators exceeding the requirements of relevant standards.
Smart Images
Figure CN121087635A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of geotechnical materials, and more particularly relates to a high-strength high-temperature-resistant polypropylene filament geotextile and a preparation method and application thereof. BACKGROUND
[0002] At present, the construction of traffic infrastructure is continuously promoted, and the scale of projects such as highways, railways, bridges and subways is increasingly expanding. Highways occupy an extremely important position in traffic transportation due to the characteristics of "low investment, quick effect, flexible and strong adaptability" and the realization of "door-to-door" direct transportation, and develop particularly rapidly. At present, most highways use semi-rigid base, and the construction method of spraying asphalt on the geotextile on the base, and the geotextile uses polypropylene filament geotextile. At present, modified asphalt is mostly used in engineering, and the use temperature is 165-175 DEG C, while the melting point of polypropylene filament geotextile is about 165 DEG C. Therefore, when high-temperature asphalt is sprayed on the polypropylene filament geotextile, the structure of the polypropylene filament geotextile is easily damaged, the indicators of the polypropylene filament geotextile are greatly reduced, the polypropylene filament geotextile cannot play the due role, and thus the engineering quality and service life are affected.
[0003] With the continuous expansion of the current infrastructure construction, especially the increase of investment in the field of highways, the market has great growth potential. The improvement of the awareness of sustainable development also promotes the demand for high-performance geotextile. Therefore, it is urgent to propose a high-strength high-temperature-resistant polypropylene filament geotextile and a preparation method and application thereof. SUMMARY
[0004] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a high-strength high-temperature-resistant polypropylene filament geotextile and a preparation method and application thereof. The high-strength high-temperature-resistant polypropylene filament geotextile for highways of the present application is not affected at 180 DEG C, and solves the problem that the structure of the polypropylene filament geotextile is damaged due to the excessively high temperature of asphalt, resulting in the decrease of the engineering quality and service life of the highway.
[0005] In order to achieve the above-mentioned purpose, the first aspect of the present application provides a high-strength high-temperature-resistant polypropylene filament geotextile, and the raw materials of the polypropylene filament geotextile comprise the following components: polypropylene chips, calcium carbonate masterbatch and anti-aging agent.
[0006] According to the present application, preferably, the content of polypropylene chips is 75-88%, the content of calcium carbonate masterbatch is 10.5-19.5%, and the content of anti-aging agent is 0.5-6%, based on the total weight of the raw materials of the polypropylene filament geotextile.
[0007] The melting point of the calcium carbonate master batch (manufacturer: Ningbo Masterbatch Co., Ltd., model: NB901, composition: 65% polypropylene and 35% calcium carbonate) used in the application is about 1300 DEG C, thus the polypropylene melt prepared by using the calcium carbonate master batch as an additive changes the molecular structure of the polypropylene (calcium carbonate and polypropylene copolymerize to introduce calcium carbonate groups into the molecular structure of the polypropylene, so that the polypropylene molecular chain is more compact, thereby improving the high-temperature resistance of the polypropylene filament geotextile).
[0008] According to the application, preferably, the content of the polypropylene chip is 75-85%, the content of the calcium carbonate master batch is 11-19%, and the content of the anti-aging agent is 0.5-6%, based on the total weight of the raw material of the polypropylene filament geotextile.
[0009] The second aspect of the application provides a preparation method of the high-strength high-temperature-resistant polypropylene filament geotextile, which comprises the following steps: mixing the polypropylene chip, the calcium carbonate master batch and the anti-aging agent, and sequentially performing melt extrusion, melt filtration, component spinning, cooling drafting, wire laying, needle punching reinforcement, tentering, ironing and winding to obtain the high-strength high-temperature-resistant polypropylene filament geotextile.
[0010] According to the application, preferably, the equipment used for the melt extrusion is a double-screw extruder, which is sequentially divided into the first to tenth temperature zones from the inlet to the outlet, the temperature of the first to second temperature zones is 200-208 DEG C, the temperature of the third to fourth temperature zones is 208-216 DEG C, the temperature of the fifth to sixth temperature zones is 216-224 DEG C, the temperature of the seventh to eighth temperature zones is 224-232 DEG C, and the temperature of the ninth to tenth temperature zones is 232-240 DEG C.
[0011] According to the application, preferably, the cooling drafting is to draft the filament bundle obtained by the component spinning onto a webbing curtain by side-blowing cooling and air flow drafting; The temperature of the side-blowing is set to 12-18 DEG C, the wind speed of the side-blowing is set to 0.5-1.5 m / s, and the humidity of the side-blowing is set to 60-70%; The pressure of the air flow drafting is 0.6-0.7 bar; The webbing curtain is sequentially provided with a spraying equipment and two static eliminators; the spraying equipment is provided with a plurality of spray heads, each spray head sprays the spinning oil at a spraying amount of 35-45 mL / min, and the concentration of the spinning oil is 5.5-6.5%.
[0012] According to the application, preferably, the needle punching reinforcement comprises the following steps performed in sequence: spraying lubricant treatment, pre-needle punching reinforcement, first main needle punching reinforcement (main needle punching I) and second main needle punching reinforcement (main needle punching II); The pre-needling reinforcement has a needling density of 40-60 needles / cm 2 , and a needling depth of 11-12 mm. The first and second main needling reinforcements each independently have a needling density of 55-75 needles / cm 2 , and each independently have a needling depth of 11.3-12.3 mm.
[0013] According to the present application, preferably, the tentering temperature is 115-150 DEG C.
[0014] According to the present application, preferably, the high-strength high-temperature-resistant polypropylene filament geotextile has a width of 3500-5500 mm, and a ratio of longitudinal to transverse breaking strength of (1-1.1):1, preferably 1:1.
[0015] The present application can switch the width of the high-strength high-temperature-resistant polypropylene filament geotextile product between 3500 mm and 5500 mm, and the ratio of longitudinal to transverse breaking strength reaches 1:1, by adjusting the tentering temperature and the tentering amount.
[0016] According to the present application, preferably, the high-strength high-temperature-resistant polypropylene filament geotextile after being wound into a roll has a roll diameter of 30-110 cm. The present application can switch the roll diameter of the high-strength high-temperature-resistant polypropylene filament geotextile product between 30 cm and 110 cm according to customer requirements.
[0017] The present application forms the high-strength high-temperature-resistant polypropylene filament geotextile product through the processes of melting by a double-screw extruder, impurity filtering by a melt filter, spinning by a spinning box and components, cooling and drawing, yarn laying, (lubricating) needling reinforcement, tentering, and winding into a roll, i.e. 1. The present application changes the drawing static pressure, increases the polypropylene molecular homodistribution, and increases the filament strength. 2. The present application increases the spinning oil concentration and spraying amount, which can effectively protect the filament integrity and improve the strength and elongation of the high-strength high-temperature-resistant polypropylene filament geotextile product. 3. The present application increases the needling density and needling depth, increases the fiber entanglement points, and improves the product strength. The above "1, 2, 3" points make the polypropylene filament geotextile product of the present application have excellent mechanical properties.
[0018] The third aspect of the present application provides the application of the high-strength high-temperature-resistant polypropylene filament geotextile and / or the high-strength high-temperature-resistant polypropylene filament geotextile prepared by the preparation method in building roads.
[0019] The beneficial effects of the technical solution of the present application are as follows: The high-strength and high-temperature-resistant polypropylene filament geotextile for highways provided by the application is not affected in the environment of 180 DEG C, and the problem that the structure of the polypropylene filament geotextile is damaged due to the excessively high temperature (165 DEG C-175 DEG C) of asphalt, thereby reducing the engineering quality and service life of highways is solved.
[0020] The polypropylene filament geotextile product provided by the application also has excellent mechanical properties, and the high-strength and high-temperature-resistant polypropylene filament needle-punched geotextile product obtained by the preparation method has a grammage of >150 g / m 2 , a longitudinal and transverse breaking strength of >10.5 KN / m, a longitudinal and transverse breaking elongation of >70%, a longitudinal and transverse tear strength of >450 N, a CBR breaking strength of >1.7 KN, and an ultraviolet resistance strength retention rate of >80%, and the product remains intact and the indexes are not affected in the environment of 180 DEG C. The high-strength and high-temperature-resistant polypropylene filament needle-punched geotextile product provided by the application fully meets and exceeds the technical requirements specified in the relevant standards such as GB / T 17639-2008.
[0021] Other features and advantages of the application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0022] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:
[0023] Figure 1 A production flowchart of the high-strength and high-temperature-resistant polypropylene filament geotextile provided by the application is shown. DETAILED DESCRIPTION
[0024] The preferred embodiments of the application will be described in more detail below. Although the preferred embodiments of the application are described below, it should be understood that the application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the application more thorough and complete, and to fully convey the scope of the application to those skilled in the art.
[0025] In the following various examples and comparative examples: The spinning oil is selected from Henan Nanyang Zhenhua Spinning Oil, model BF500FS; the spinning oil, finishing agent and lubricant are the same substance, only the use steps are different, and the names are different; The polypropylene chip is selected from Sinopec Jinan Refinery, model Y-26; The calcium carbonate master batch is selected from Ningbo Color Masterbatch Co., Ltd., model NB901; The anti-aging agent is an anti-UV master batch, which is selected from Ningbo Color Masterbatch Co., Ltd., model S2406026.
[0026] Embodiment 1
[0027] The embodiment provides a high-strength and high-temperature-resistant polypropylene filament geotextile, wherein the raw materials of the polypropylene filament geotextile include 82% of polypropylene chips, 15% of calcium carbonate master batch and 3% of anti-aging agent, based on the total weight of the raw materials of the polypropylene filament geotextile.
[0028] The embodiment further provides a preparation method of the high-strength and high-temperature-resistant polypropylene filament geotextile, including the following steps: mixing the polypropylene chips, the calcium carbonate master batch and the anti-aging agent, and sequentially performing melt extrusion, melt filtration, component spinning (the temperature of a spinning box is 235 ℃), cooling and drafting, wire laying, needle punching reinforcement, tentering, calendering and rolling into a roll to obtain the high-strength and high-temperature-resistant polypropylene filament geotextile.
[0029] In the embodiment, the melt extrusion is performed by using a double-screw extruder, and the double-screw extruder is sequentially divided into first to tenth temperature zones from an inlet to an outlet, wherein the temperature of the first to second temperature zones is 200-208 ℃, the temperature of the third to fourth temperature zones is 208-216 ℃, the temperature of the fifth to sixth temperature zones is 216-224 ℃, the temperature of the seventh to eighth temperature zones is 224-232 ℃, and the temperature of the ninth to tenth temperature zones is 232-240 ℃. The cooling and drafting is performed by using side-blowing air cooling and air flow drafting to draft the yarns obtained through the component spinning onto a webbing curtain, wherein the temperature of the side-blowing air is set to be 12-18 ℃, the wind speed of the side-blowing air is set to be 0.5-1.5 m / s, and the humidity of the side-blowing air is set to be 60-70%; the pressure of the air flow drafting is 0.65 ar; the webbing curtain is sequentially provided with a spraying device and two static eliminators; the spraying device is provided with a plurality of spray heads, and the spraying amount of the spinning finish agent sprayed by each spray head is 35-45 mL / min, and the concentration of the spinning finish agent is 6%.
[0030] The needle punching reinforcement includes spraying lubricant treatment, pre-needle punching reinforcement, finishing agent application, first main needle punching reinforcement and second main needle punching reinforcement which are sequentially performed; the needle punching density of the pre-needle punching reinforcement is 50 pokes / cm 2 , and the needle punching depth of the pre-needle punching reinforcement is 11.5 mm; the needle punching density of each of the first main needle punching reinforcement and the second main needle punching reinforcement is independently 65 pokes / cm 2 , and the needle punching depth of each of the first main needle punching reinforcement and the second main needle punching reinforcement is independently 11.8 mm.
[0031] The tentering temperature is 130 ℃.
[0032] Embodiment 2
[0033]
[0034] The embodiment provides high-strength and high-temperature-resistant polypropylene filament geotextile, and the embodiment is different from the embodiment 1 only in that: The raw material of the polypropylene filament geotextile comprises, according to the total weight of the raw material of the polypropylene filament geotextile: 87% of polypropylene chips, 10% of calcium carbonate master batch and 3% of anti-aging agent.
[0035] Embodiment 3
[0036] The embodiment provides high-strength and high-temperature-resistant polypropylene filament geotextile, and the embodiment is different from the embodiment 1 only in that: The raw material of the polypropylene filament geotextile comprises, according to the total weight of the raw material of the polypropylene filament geotextile: 77% of polypropylene chips, 20% of calcium carbonate master batch and 3% of anti-aging agent.
[0037] Embodiment 4
[0038] The embodiment provides high-strength and high-temperature-resistant polypropylene filament geotextile, and the embodiment is different from the embodiment 1 only in that: The needle punching reinforcement comprises, in sequence, spraying a lubricant, pre-needle punching reinforcement, applying a finishing agent, first main needle punching reinforcement and second main needle punching reinforcement; the needle punching density of the pre-needle punching reinforcement is 55 strokes / cm 2 , and the needle punching depth is 11 mm; the needle punching density of the first main needle punching reinforcement and the second main needle punching reinforcement is independently 70 strokes / cm 2 , and the needle punching depth of the first main needle punching reinforcement and the second main needle punching reinforcement is independently 11.5 mm.
[0039] The tentering temperature of the tentering is 140 DEG C.
[0040] Comparative Example 1
[0041] The comparative example provides polypropylene filament geotextile, and the comparative example is different from the embodiment 1 only in that: The raw material of the polypropylene filament geotextile comprises, according to the total weight of the raw material of the polypropylene filament geotextile: 97% of polypropylene chips and 3% of anti-aging agent.
[0042] Test Example 1
[0043] The test example tests the production status and high-temperature-resistant performance of the polypropylene filament geotextile in the above embodiment and comparative example.
[0044] The method for testing the high-temperature-resistant performance is that the geotextile is placed in an oven at 180 DEG C for 10 minutes, and then the integrity of the cloth surface is observed; The test results are shown in Table 1.
[0045] Table 1
[0046] As can be seen from Table 1, when the content of calcium carbonate master batch is less (Example 2), the prepared polypropylene filament geotextile is affected at 180℃ environment, resulting in serious damage to the structure of the geotextile product; when the content of calcium carbonate master batch is more (Example 3), the production of polypropylene filament geotextile is unstable.
[0047] Test Example 2
[0048] The mechanical properties of the polypropylene filament geotextile of the above examples and comparative examples were tested in this test example.
[0049] The test method includes: mass per unit area: GB / T 13762; breaking strength and elongation at break: GB / T 15788; tear strength: GB / T 13763; CBR puncture strength: GB / T 14800.
[0050] The test results are shown in Table 2.
[0051] Table 2
[0052] The polypropylene filament geotextile product of the present application has excellent mechanical properties and high temperature resistance, and can resist high temperature of 180℃, which exceeds the service temperature of asphalt, effectively maintains the integrity of the geotextile during construction, and improves the engineering quality and engineering life. It has great significance for improving the quality of pavement engineering, ensuring traffic safety and saving cost, and therefore has broad market prospects.
[0053] The above has described various embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. A high-strength, high-temperature resistant polypropylene filament geotextile, characterized in that, The raw materials for the polypropylene filament geotextile include the following components: polypropylene chips, calcium carbonate masterbatch, and anti-aging agent.
2. The high-strength, high-temperature resistant polypropylene filament geotextile according to claim 1, wherein, Based on the total weight of the raw materials for the polypropylene filament geotextile, the content of polypropylene chips is 75-88%, the content of calcium carbonate masterbatch is 10.5-19.5%, and the content of anti-aging agent is 0.5-6%.
3. The high-strength, high-temperature resistant polypropylene filament geotextile according to claim 1 or 2, wherein, Based on the total weight of the raw materials for the polypropylene filament geotextile, the content of polypropylene chips is 75-85%, the content of calcium carbonate masterbatch is 11-19%, and the content of anti-aging agent is 0.5-6%.
4. The method for preparing the high-strength, high-temperature resistant polypropylene filament geotextile according to any one of claims 1-3, characterized in that, The preparation method includes the following steps: mixing the polypropylene chips, calcium carbonate masterbatch and anti-aging agent, and then sequentially performing melt extrusion, melt filtration, component spinning, cooling and stretching, filament laying, needle punching reinforcement, stretching and shaping, ironing and winding into rolls to obtain the high-strength and high-temperature resistant polypropylene filament geotextile.
5. The method for preparing high-strength, high-temperature resistant polypropylene filament geotextile according to claim 4, wherein, The melt extrusion is performed using a twin-screw extruder, which is divided into 1 to 10 temperature zones from the inlet to the outlet. The temperature of temperature zone 1-2 is 200-208℃, the temperature of temperature zone 3-4 is 208-216℃, the temperature of temperature zone 5-6 is 216-224℃, the temperature of temperature zone 7-8 is 224-232℃, and the temperature of temperature zone 9-10 is 232-240℃.
6. The method for preparing high-strength, high-temperature resistant polypropylene filament geotextile according to claim 4, wherein, The cooling and drawing process involves drawing the filament bundles obtained by spinning through the component onto the web forming curtain via side-blowing cooling and airflow drawing. The temperature of the side-blowing air is set to 12-18℃, the wind speed is set to 0.5-1.5m / s, and the humidity is set to 60-70%. The pressure of the airflow stretching is 0.6-0.7 bar; The spinning curtain is equipped with a spraying device and two static eliminators in sequence; the spraying device is equipped with multiple nozzles, and each nozzle sprays a spinning oil agent at a rate of 35-45 mL / min, and the concentration of the spinning oil agent is 5.5-6.5%.
7. The method for preparing high-strength, high-temperature resistant polypropylene filament geotextile according to claim 4, wherein, The needle reinforcement includes sequentially performing lubricant spraying treatment, pre-needle reinforcement, first main needle reinforcement, and second main needle reinforcement; The acupuncture density of the pre-needle reinforcement is 40-60 needles / cm². 2 The needle insertion depth is 11-12 mm; The acupuncture density of the first and second main acupuncture reinforcements is independently 55-75 needles / cm². 2 The acupuncture depths of the first and second main acupuncture reinforcements are each 11.3-12.3 mm.
8. The method for preparing high-strength, high-temperature resistant polypropylene filament geotextile according to claim 4, wherein, The stretching temperature for the stretching and setting process is 115-150℃; Preferably, the width of the high-strength, high-temperature resistant polypropylene filament geotextile is 3500-5500mm, and the ratio of longitudinal to transverse breaking strength is (1-1.1):
1.
9. The method for preparing high-strength, high-temperature resistant polypropylene filament geotextile according to claim 4, wherein, The diameter of the high-strength, high-temperature resistant polypropylene filament geotextile after being wound into rolls is 30-110cm.
10. The application of the high-strength, high-temperature resistant polypropylene filament geotextile according to any one of claims 1-3 and / or the high-strength, high-temperature resistant polypropylene filament geotextile prepared by the preparation method according to any one of claims 4-9 in highway construction.