Environment-friendly production process of polyester belt

Abstract

The invention relates to the technical field of polyester belt production, and discloses an environment-friendly production process of a polyester belt, which comprises the following steps: selecting a specific degradable polyester material as a basic raw material; putting the raw materials into a reaction kettle which is provided with multiple stages of stirring blades and can accurately control the temperature, and carrying out prepolymerization reaction; carrying out deep polymerization reaction after prepolymerization; extruding and molding the polymerization product into a polyester belt by using an extrusion mold with a special runner design; the extruded polyester belt enters a cooling chamber to be cooled; performing surface treatment after cooling; and the treated polyester belt is wound. According to the environment-friendly production process of the polyester belt, environment-friendly materials, advanced production equipment and a process technology are adopted, so that the environment-friendly performance and quality of the product are improved, and high efficiency, energy conservation and intelligence of the production process are also realized. The polyester belt produced by the process has good degradability, excellent material performance and stable product quality, and can be widely applied to various fields.

Description

Technical Field

[0001] The present invention relates to the technical field of polyester belt production, and specifically to an environmentally friendly production process for polyester belts. Background Art

[0002] With the continuous improvement of environmental awareness and the deepening of the concept of sustainable development, people have higher and higher requirements for the environmental performance and quality of materials. In the field of polyester belt production, traditional production processes often have some problems.

[0003] The materials used in traditional polyester belt production may cause a greater burden on the environment. Their degradability is poor, and it is difficult to decompose naturally after being discarded, easily leading to environmental pollution. Moreover, the performance of traditional materials also needs to be improved, such as insufficient toughness and unsatisfactory flame retardancy, which limit the application scope of polyester belts.

[0004] In terms of the production process, the stirring effect of traditional reaction kettles may not be ideal enough, resulting in uneven mixing of raw materials, affecting the progress of the reaction and the stability of product quality. The control accuracy of temperature and pressure may also be insufficient, making the reaction conditions not optimized enough, reducing production efficiency and product quality.

[0005] In addition, the traditional polymerization reaction process may be relatively slow, with low production efficiency. During the extrusion molding process, problems may exist in the uniformity and stability of extrusion, affecting the quality of the product. During the cooling process, the cooling effect may be uneven, affecting the performance of the product. The surface treatment technology may not be advanced enough to effectively improve the surface performance of the polyester belt. During the winding process, the control of tension may not be precise enough, resulting in unstable winding quality.

[0006] In summary, in order to solve the problems of poor environmental performance, unsatisfactory material performance, and backward production process in traditional polyester belt production processes, the present invention proposes an environmentally friendly production process for polyester belts, aiming to improve the environmental performance and quality of products, optimize the production process, and achieve efficient, energy-saving, and intelligent production. Summary of the Invention

[0007] (I) Technical Problems to be Solved

[0008] Aiming at the deficiencies of the prior art, the present invention provides an environmentally friendly production process for polyester belts to solve the above problems.

[0009] (II) Technical Solutions

[0010] To achieve the above object, the present invention provides the following technical solutions: An environmentally friendly production process for polyester belts, comprising the following steps:

[0011] Select a specific biodegradable polyester material as the base raw material. The biodegradable polyester material contains a specific proportion of bio-based polyester components (35% polylactic acid, 25% polyhydroxyalkanoate), a modified additive (5% nano-silica), a toughening agent (15% polybutylene succinate), and a flame retardant (10% magnesium hydroxide) to enhance environmental performance and material properties;

[0012] Put the raw materials into a reaction kettle with multi-stage stirring blades and precise temperature control for prepolymerization reaction. The multi-stage stirring blades can ensure that the raw materials are fully and evenly mixed. The prepolymerization reaction temperature is maintained at 180°C - 200°C, and the pressure is controlled at 0.2MPa - 0.3MPa;

[0013] After prepolymerization, carry out deep polymerization reaction. By introducing microwave-assisted technology to accelerate the polymerization process, at the same time, use an intelligent temperature control system to accurately control the reaction temperature at 230°C - 250°C, and use a circulating gas purification device to purify the waste gas generated during the reaction in real time;

[0014] Use an extrusion die with a special runner design to extrude the polymerization product into a polyester tape. The extrusion die can adjust the extrusion speed and tape thickness according to needs;

[0015] The extruded polyester tape enters the cooling chamber for cooling. The cooling chamber is equipped with evenly distributed cooling nozzles and uses a specific environmentally friendly cooling medium for cooling;

[0016] After cooling, carry out surface treatment to improve the surface performance of the polyester tape through plasma treatment technology;

[0017] Wind up the treated polyester tape. The winding device is equipped with a tension automatic adjustment system to ensure the winding quality.

[0018] As a preferred technical solution of the present invention, the structural design of the multi-stage stirring blades includes three layers of blades. The upper layer is a three-blade impeller, the middle layer is a four-blade impeller, the lower layer is a two-blade impeller, and the angles of the blades in each layer are different.

[0019] As a preferred technical solution of the present invention, the parameters of the microwave-assisted technology include a frequency of 2.45GHz and a power of 500W.

[0020] As a preferred technical solution of the present invention, the control algorithm of the intelligent temperature control system uses the PID algorithm, and the accuracy can reach ±0.5°C.

[0021] As a preferred technical solution of the present invention, the purification principle of the circulating gas purification device is to adsorb harmful substances in the waste gas through an adsorbent, and the efficiency can reach more than 95%.

[0022] As a preferred technical solution of the present invention, the specific feature of the special flow channel design is that the flow channel is a gradually shrinking cone, making the extrusion more uniform and stable.

[0023] As a preferred technical solution of the present invention, the arrangement of the cooling nozzles is in a horizontal and vertical staggered pattern, and the cooling medium is an environmentally friendly water-based coolant.

[0024] As a preferred technical solution of the present invention, the process parameters of the plasma treatment technology are a working pressure of 10 Pa, a power of 300 W, and a treatment time of 30 s.

[0025] As a preferred technical solution of the present invention, the adjustment method of the automatic tension adjustment system is to monitor the tension in real time through a sensor and feedback it to the control system, and the control system adjusts the winding speed, with an accuracy of up to ±0.1 N.

[0026] Compared with the prior art, the present invention provides an environmentally friendly production process for polyester tapes, having the following

[0027] Beneficial effects:

[0028] Improved environmental performance:

[0029] A degradable polyester material containing specific proportions of bio-based polyester components (polylactic acid, polyhydroxyalkanoates) is selected as the base material, reducing the dependence on traditional petroleum-based materials, reducing the pressure on the environment, having good degradability, and reducing environmental pollution by waste.

[0030] The circulating gas purification device used in the reaction process adsorbs harmful substances in the waste gas through an adsorbent, with a purification efficiency of over 95%, effectively reducing the harm of waste gas emissions to the environment.

[0031] Optimized material properties:

[0032] The addition of the modified additive nano-silica effectively improves various properties of the material.

[0033] The use of the toughening agent polybutylene succinate improves the toughness of the material, making the polyester tape have better impact resistance and durability.

[0034] The addition of the flame retardant magnesium hydroxide enhances the flame retardant properties of the material and improves the safety of the polyester tape.

[0035] Advanced production process:

[0036] The reaction kettle has multi-stage stirring blades, and its unique three-layer blade design (the upper layer is a three-blade impeller, the middle layer is a four-blade impeller, the lower layer is a two-blade impeller, and the blade angles of each layer are different) ensures that the raw materials are fully and evenly mixed, improving the uniformity and sufficiency of the reaction, and thus ensuring the stability of the product quality.

[0037] In the pre-polymerization reaction and the deep polymerization reaction, the reaction kettle with precise temperature control creates ideal conditions for the reaction. The strictly controlled temperature and pressure parameters help improve the reaction efficiency and product quality.

[0038] The microwave-assisted technology introduced in the deep polymerization reaction accelerates the polymerization process and improves production efficiency. The intelligent temperature control system adopts the PID algorithm with an accuracy of up to ±0.5°C, ensuring a high degree of stability of the reaction temperature.

[0039] The extrusion die has a special runner design (the runner is a gradually shrinking cone), making the extrusion more uniform and stable. The extrusion speed and strip thickness can be adjusted according to needs, meeting different application requirements.

[0040] The evenly distributed cooling nozzles arranged vertically and horizontally in the cooling chamber, together with the use of an environmentally friendly water-based coolant, ensure uniform cooling of the polyester belt while reducing the impact on the environment.

[0041] The plasma treatment technology used in the surface treatment improves the surface properties of the polyester belt, enhancing its surface quality and functionality.

[0042] The automatic tension adjustment system equipped in the winding device monitors the tension in real time through sensors and feeds it back to the control system. The control system adjusts the winding speed with an accuracy of up to ±0.1N, ensuring a high degree of stability and reliability of the winding quality.

[0043] In summary, an environmentally friendly production process for polyester belts of the present invention, by using environmentally friendly materials, advanced production equipment and process technologies, not only improves the environmental performance and quality of the products, but also realizes the high efficiency, energy saving and intelligence of the production process. The polyester belts produced by this process have good degradability, excellent material properties and stable product quality, and can be widely used in various fields. At the same time, it has important significance for environmental protection and sustainable development. Description of the Drawings

[0044] Figure 1 It is the process flow chart of the production process of the present invention;

[0045] Figure 2 It is the structural schematic diagram of the multi-stage stirring paddle of the present invention.

[0046] Among them: 1. Multi-stage stirring paddle. Detailed Embodiments

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all of the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments of the invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the invention.

[0048] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, "a plurality of" means two or more. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the invention.

[0050] Please refer to Figure 1-2 , an environmentally friendly production process for polyester belts, and the specific implementation process is as follows:

[0051] First, carefully select a degradable polyester material containing a specific proportion of bio-based polyester components as the base material. Among them, polylactic acid accounts for 35%, and polyhydroxyalkanoate accounts for 25%. These two bio-based polyester components can not only ensure the degradability of the material but also endow the product with good environmental protection performance. At the same time, the modified additive nano-silica accounts for 5%, which can effectively improve the various properties of the material; the toughening agent polybutylene succinate accounts for 15%, which can improve the toughness of the material; the flame retardant magnesium hydroxide accounts for 10%, enhancing the flame retardant characteristics of the material.

[0052] Next, put these carefully selected raw materials into a reaction kettle with multi-stage stirring blades and precise temperature control for prepolymerization reaction. The structural design of the multi-stage stirring blades is unique. The upper layer is a three-blade impeller, the middle layer is a four-blade impeller, and the lower layer is a two-blade impeller, and the angles of the impellers in each layer are different. Such a design enables the raw materials to be fully and evenly stirred in the reaction kettle, ensuring the uniformity and sufficiency of the reaction. During the prepolymerization reaction, strictly maintain the temperature within the range of 180°C to 200°C, and accurately control the pressure between 0.2 MPa and 0.3 MPa to create ideal conditions for the prepolymerization reaction.

[0053] After the pre-polymerization is completed, it enters the deep polymerization reaction stage. During this process, an advanced microwave-assisted technology is introduced. The frequency of the microwave is set at 2.45 GHz and the power is 500 W. This microwave-assisted technology can significantly accelerate the polymerization process and improve the reaction efficiency. At the same time, an intelligent temperature control system is adopted. Its control algorithm uses an accurate PID algorithm, which can accurately control the reaction temperature between 230 °C and 250 °C, with an accuracy of up to ±0.5 °C, ensuring a high degree of stability of the reaction temperature. In addition, a circulating gas purification device is equipped. The purification principle of this device is to adsorb harmful substances in the waste gas generated during the reaction through highly efficient adsorbents, and the purification efficiency is over 95%, thus effectively reducing environmental pollution.

[0054] Subsequently, an extrusion die with a special runner design is used to extrude the polymerization product into a polyester tape. The runner of this extrusion die is in a gradually shrinking conical shape. This unique design makes the extrusion process more uniform and stable, and can flexibly adjust the extrusion speed and the thickness of the tape according to actual production requirements to meet different application scenarios and customer needs.

[0055] The extruded polyester tape immediately enters the cooling chamber for cooling treatment. Uniformly distributed cooling nozzles are arranged in the cooling chamber. These nozzles are arranged in a horizontal and vertical staggered manner to ensure the comprehensiveness and uniformity of cooling. The cooling medium is an environmentally friendly water-based coolant. This coolant not only has good cooling effects but is also environmentally friendly.

[0056] After cooling, surface treatment is carried out, and an advanced plasma treatment technology is adopted. The specific process parameters are set as the working pressure of 10 Pa, the power of 300 W, and the treatment time of 30 s. Through this plasma treatment technology, the surface properties of the polyester tape can be significantly improved, and its surface quality and functionality can be enhanced.

[0057] Finally, the treated polyester tape is wound up. The winding device is equipped with a tension automatic adjustment system. This system uses high-precision sensors to monitor the change of tension in real time and feeds the data back to the control system in a timely manner. The control system then accurately adjusts the winding speed according to the feedback information. The tension adjustment accuracy can reach ±0.1 N, thus ensuring a high degree of stability and reliability of the winding quality. Through the above series of rigorous and delicate technological steps, high-quality and environmentally friendly polyester tape products are finally produced.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0059] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Accordingly, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0060] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An environmentally friendly production process for polyester belts, characterized in that: The following steps are involved: A specific degradable polyester material is selected as the basic raw material, wherein the degradable polyester material contains a specific proportion of bio-based polyester components (polylactic acid 35%, polyhydroxyalkanoate 25%), a modification additive (nano silicon dioxide 5%), a toughening agent (polybutylene succinate 15%), and a flame retardant (magnesium hydroxide 10%) to improve environmental performance and material properties; The raw materials are put into a reactor with multi-stage stirring blades and precise temperature control for prepolymerization reaction. The multi-stage stirring blades can ensure that the raw materials are fully mixed and uniform. The prepolymerization reaction temperature is maintained at 180°C-200°C and the pressure is controlled at 0.2MPa-0.3MPa; After prepolymerization, deep polymerization reaction is carried out. The polymerization process is accelerated by introducing microwave-assisted technology. At the same time, an intelligent temperature control system is used to accurately control the reaction temperature at 230℃-250℃, and a circulating gas purification device is used to purify the waste gas generated during the reaction in real time. The polymer product is extruded into a polyester tape using an extrusion die with a special flow channel design, and the extrusion die can adjust the extrusion speed and tape thickness as required; The extruded polyester tape enters the cooling chamber for cooling. The cooling chamber is equipped with evenly distributed cooling nozzles and uses a specific environmentally friendly cooling medium for cooling. After cooling, the surface is treated to improve the surface properties of the polyester belt through plasma treatment technology; The treated polyester tape is reeled up, and the reeling device is equipped with an automatic tension adjustment system to ensure the reeling quality.

2. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The structural design of the multi-stage stirring blade (1) comprises three layers of blades, the upper layer is a three-blade blade, the middle layer is a four-blade blade, and the lower layer is a two-blade blade, and the blades of each layer have different angles.

3. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The parameters of the microwave-assisted technology include a frequency of 2.45 GHz and a power of 500 W.

4. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The control algorithm of the intelligent temperature control system adopts PID algorithm, and the accuracy can reach ±0.5°C.

5. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The purification principle of the circulating gas purification device is to absorb harmful substances in the exhaust gas through an adsorbent, and the efficiency can reach more than 95%.

6. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The specific feature of the special flow channel design is that the flow channel is in a gradually shrinking cone shape, which makes the extrusion more uniform and stable.

7. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The cooling nozzles are arranged in a staggered manner horizontally and vertically, and the cooling medium is an environmentally friendly water-based coolant.

8. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The process parameters of the plasma treatment technology are working gas pressure 10Pa, power 300W, and treatment time 30s.

9. The environmentally friendly production process of polyester tape according to claim 1, characterized in that: The automatic tension adjustment system is adjusted in a manner that the tension is monitored in real time by a sensor and fed back to the control system, and the control system adjusts the winding speed with an accuracy of up to ±0.1N.

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