Integrated oiling system and production device for functional polyester industrial yarn

Abstract

This invention discloses an integrated oiling system and production equipment for functional polyester industrial yarn, which relates to the textile field. It aims to solve the problem that in the prior art, the oiling agents are all single-component oiling agents, and the resulting polyester industrial yarn needs to be placed in a high-temperature drying room for drying at 50-90°C for 2-5 days, and then still needs to be left to stand for several weeks before it can be used. The key point of the technical solution is that the yarn first has the first component oiling agent applied through the first oiling nozzle, and after being homogenized by the pre-networker, the second component oiling agent is applied through the second oiling nozzle. Finally, it is treated at high temperature by the relaxation roller, so that the catalytic cross-linking reaction of epoxy resin is completed directly before winding, and it can be used directly without the need for additional drying room or long-term room temperature curing.

Description

Technical Field

[0001] This invention relates to the technical field of textiles, specifically to an integrated oiling system and production apparatus for functional polyester industrial yarn. Background Technology

[0002] This invention belongs to the field of industrial yarn manufacturing technology, specifically relating to an integrated oiling system and production device for functional polyester industrial yarn. In fiber spinning and processing, oiling agents are auxiliary agents that primarily act as lubricants to compensate for the adhesion of synthetic fiber surfaces, ensuring smooth spinning. Using oiling agents in fiber spinning can effectively reduce static electricity generated by high-speed fiber bundle movement, control the cohesion between fiber bundles, and impart excellent bundle-gathering properties, ensuring that the fiber bundles can meet the requirements of subsequent processes and weaving. However, existing chemical fiber oiling agents often exhibit poor fiber adhesion and coating, resulting in fuzzing, splitting, and breakage during spinning. Furthermore, at high temperatures, abnormalities such as white exudates, severe coking on hot rollers, blue smoke, and tangled (residual) fibers on hot rollers can occur, leading to poor winding and affecting fiber quality.

[0003] Major industrial yarn manufacturers typically add oil to activated polyester yarn after the last pair of rollers and before the winding device by installing oiling nozzles. This process creates functional polyester industrial fibers, such as activated yarn and seawater-repellent yarn, and is widely used in industrial yarn production. The characteristics (and disadvantages) of this method are: the manufactured products require further drying in an oven at 50-90℃ for 2-5 days, followed by several weeks of rest before use; for products requiring high oil addition, the oiling uniformity is poor; and because oiling occurs before winding, the swaying of the winding machine's fork causes significant oil splashing. With the development of the rubber and textile industries, the demand for functional polyester industrial yarn is increasing, and the performance requirements for these products are also becoming more stringent.

[0004] An existing patent number 202411979960.7 describes an activator for polyester industrial yarns and its preparation method. The activator comprises: 10 parts by weight of deionized water, 1-6 parts by weight of waterborne epoxy resin, 2-10 parts by weight of end-capped isocyanate, 5-300 parts by weight of wetting and penetrating agent, and 5-200 parts by weight of epoxy curing agent for a high-viscosity formulation with low harm to human health.

[0005] A system and method for oiling activated polyester industrial yarn production, patent number 201110135784.5, includes a pretension roller, a feed roller on one side of the pretension roller, and a first drafting roller, a second drafting roller, and a relaxation drafting roller arranged from bottom to top above the feed roller. The key feature is that an oiling nozzle is provided between the second drafting roller and the relaxation drafting roller. The oiling method for activated polyester industrial yarn production employs the following steps: the yarn bundle enters the pretension roller, then the feed roller and the first drafting roller; the yarn bundle enters the second drafting roller; the yarn bundle passes through the yarn path in the oiling nozzle, and activator overflows from the upper part of the oiling nozzle; the yarn bundle coated with activator then enters the relaxation drafting roller; finally, the yarn bundle enters the winding head and is wound into the finished product. This invention does not require a professional high-temperature drying oven; it only utilizes a pair of relaxation high-temperature hot rollers for shaping during production to complete the production of activated yarn, improving the utilization rate of the activator in condensed polyester industrial yarn and reducing production costs.

[0006] The existing technical solutions described above have the following drawbacks: All the oils mentioned are single-component oils, requiring the resulting polyester industrial yarns to be placed in a high-temperature drying oven at 50-90℃ for 2-5 days. Afterward, they still need to be left to stand for several weeks before use. A simple second oiling is insufficient to ensure good adhesion between the polyester industrial yarns and rubber. In particular, oiling with two-component oils has become a major technical challenge for the industry. Some have attempted to incorporate the first component of the two-component oil into the initial oiling agent, using the second component as a secondary oiling agent. However, this method easily disrupts the component balance and stability of the initial oiling agent, affecting the hot drawing performance of the industrial yarns and causing problems such as coking on the hot drawing rollers. Furthermore, because the first component undergoes hot drawing at approximately 250℃ before encountering the second component, the remaining amount and activity of the first component are significantly affected, reducing the chemical reaction with the second component and the uniformity of oiling, resulting in functional polyester industrial yarns with poor performance. Therefore, researching suitable combinations of two-component oiling agents, oiling systems for two-component oiling agents, and production processes has become a problem that functional polyester industrial yarns need to solve. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated oiling system and production apparatus for functional polyester industrial yarns.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The system includes a secondary oiling system equipped with a two-component oiler. The secondary oiling system comprises industrial yarn, a feed roller, a pretension roller, a first pair of drafting rollers, a second pair of drafting rollers, a heating roller, a relaxation roller, and a winding roller. The industrial yarn passes sequentially through the pretension roller, the feed roller, the first pair of drafting rollers, the second pair of drafting rollers, the heating roller, and the relaxation roller before finally entering the winding roller. The relaxation roller and the heating roller are arranged vertically along the direction of gravity. The two-component oiler is fixedly installed between the relaxation roller and the heating roller.

[0009] By adopting the above technical solution, the heating roller is set at a temperature of 220-250℃, and the relaxation roller is set at a temperature of ≥160℃. After the polyester chips are melt-extruded by the screw, they are extruded through the spinneret, cooled by air blowing, and pass through the tunnel. They are then initially oiled and subsequently sent to the secondary oiling system for secondary oiling. The secondary oiling agent is a two-component oiling agent, which is installed between the relaxation roller and the heating roller. After the industrial yarn is initially stretched by the first pair of drawing rollers and the second pair of drawing rollers, it enters the heating roller zone for heating. The speed difference between the heating rollers achieves further stretching of the industrial yarn. After completing the hot stretching, the industrial yarn enters the second oiling process, and finally undergoes hot relaxation treatment by the relaxation roller. Finally, it is wound and formed to produce functional polyester industrial yarn.

[0010] Furthermore, the two-component oiler includes a fixedly installed pre-network device. The bottom and top walls of the pre-network device are respectively fixedly equipped with a first oiling unit and a second oiling unit. The first oiling unit includes a first oil tank and a first nozzle fixedly installed on the pre-network device. A first oil pump connected to the first nozzle is fixedly installed inside the first oil tank. The second oiling unit includes a second oil tank and a second nozzle fixedly installed on the pre-network device. The first oil tank contains a sufficient amount of the first component oil agent. The second oil tank contains a fixedly installed second oil pump connected to the second nozzle. The first and second oil pumps are metering oil pumps. The second oil tank contains a sufficient amount of the second component oil agent. Both the first and second nozzles are designed with bottom outlets.

[0011] By adopting the above technical solution, the pre-networker air pressure is 0.5-1.5 kPa; the oil output from the lower nozzle is 0.5-4 g / min, and the oil output from the upper nozzle is 10%-60% of the lower nozzle output. The oil output from the nozzles is controlled by a metering oil pump. After the industrial yarn has been heated by the rollers to a temperature of 220-250℃, the first component oil agent is first added to the industrial yarn. The industrial yarn then undergoes pre-networking treatment to successfully homogenize the first component oil agent, which can be combined with the penetrant to further improve the penetration effect. Next, the industrial yarn passes through the upper nozzle, and the second component... The oil is added to the industrial yarn, achieving a combined distribution of the two-component oil on the surface of the industrial yarn. The industrial yarn is treated at 160°C by the relaxation roller, allowing the first and second components to react fully. Before winding, the oiling and heating activation reaction of the two-component oil are completed. At the same time, the relaxation roller is made of chrome-plated material with a surface roughness Ra value of 1.8-2.5 micrometers. By optimizing the coating material and roughness of the relaxation roller, the coking of the two-component oil on the roller can be effectively reduced, further ensuring the pre-activation effect of the two-component oil on the yarn.

[0012] Further, the first component oiling agent comprises 30-60 parts by weight of waterborne multifunctional epoxy resin, 5-20 parts by weight of epoxy diluent, 20-40 parts by weight of solvent water, 0.1-2 parts by weight of penetrant, and 10-30 parts by weight of surfactant, and the second component oiling agent is 1-5 parts by weight of sodium carbonate aqueous solution.

[0013] The waterborne multifunctional epoxy resin is one or both of glycerol glycidyl ether and sorbitol glycidyl ether.

[0014] The penetrant is sodium diisooctyl sulfosuccinate.

[0015] The surfactant is one or more of the following: polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene ether potassium phosphate, and glycol oleate.

[0016] The final product is a polyester industrial yarn with a linear density of 930-3300 dtex, a breaking strength greater than 7.0 cN / dtex, and an oil content greater than 0.3%.

[0017] By adopting the above technical solution, using polyol glycidyl ethers and epoxy diluents as the main components, the surface of industrial yarn is activated, and a penetrant is added to improve the penetration effect of the oil into the fiber, thus aiding the activation effect. The added oiliness agent and surfactant play a role in lubricating and bundling the yarn bundle. At the same time, the surfactant improves the dispersion and stability of the oil system in water. This can reduce the generation of fuzz during subsequent twisting and weaving processes, and improve the throughput of production and processing. Sodium carbonate, as an inorganic non-metallic catalyst, can lower the activation energy of the epoxy resin crosslinking reaction and promote the chemical reaction process of epoxy resin on the surface of industrial yarn.

[0018] The two-component combination ultimately achieves surface activation treatment of industrial yarn surfaces. Compared with the formulation disclosed in patent number 202411979960.7, the existing technology involves single-component premixing followed by curing with organic amine / terminated isocyanate. It first uses an inorganic non-metallic catalyst to catalyze the ring-opening polymerization of epoxy resin. In this invention, the use of a two-component oiler in conjunction with process improvements not only successfully integrates the heating catalysis process into the existing process without damage, but also only adds a two-component oiler without requiring an additional heat source. The two-component separate design can well match the characteristics of the sodium carbonate catalytic system of "stable at room temperature and active at high temperature". The optimization and improvement of the secondary oiling position takes into account the specific positional relationship between the relaxation roller and the heating roller, providing a precise temperature window for sodium carbonate catalysis.

[0019] In summary, the beneficial technical effects of the present invention are as follows: 1. It adopts a combination design of two-component separate oiling and online thermal activation of relaxation roller. The two-component oiler is fixedly set between the heating roller and the relaxation roller. The industrial yarn first applies the first component oil through the first oil nozzle, and after being homogenized by the pre-networker, the second component oil is applied by the second oil nozzle. Finally, it is treated at high temperature by the relaxation roller. Thus, the catalytic cross-linking reaction of epoxy resin is completed directly before winding. There is no need to build an additional drying room or perform long-term room temperature curing, which shortens the production cycle and significantly reduces energy consumption and equipment investment. 2. Sodium carbonate aqueous solution is used to replace the traditional organic amine / terminated isocyanate curing system, and a two-component oil storage device and sequential oiling process are used to achieve an ideal catalytic window with room temperature stability and high temperature activity. The separate placement of the two-component oil can effectively avoid the problem of shortened shelf life caused by premixing. The H-extraction adhesion of the obtained polyester industrial yarn exceeds the level of the conventional two-bath method, and the volatilization irritation and environmental pollution of organic amines are avoided, making it more green and safe.

[0020] 3. A two-component oiler with a specific location and relaxation rollers with chrome plating and a roughness Ra=1.8-2.5μm are used, so that the industrial yarn is immediately and sequentially oiled after hot drawing and activated at high temperature. This not only ensures the rapid penetration and pre-network homogenization of the first component oil on the high-temperature yarn bundle, but also effectively reduces the coking of the two-component oil on the roller surface through optimized roller roughness, ensuring the stability of long-term continuous production. Finally, high-performance functional polyester industrial yarn with a linear density of 930-3300 dtex, breaking strength >7.0 cN / dtex, and oil content >0.3% is obtained. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the secondary oiling system in this invention; Figure 2 This is a schematic diagram of the two-component oiler structure in this invention.

[0022] In the diagram, 1 is a two-component oiler; 2 is industrial yarn; 3 is a pretension roller; 4 is the first pair of drafting rollers; 5 is the second pair of drafting rollers; 6 is a heating roller; 7 is a relaxation roller; 8 is a winding roller; 11 is a pre-networker; 12 is the first oiling unit; 13 is the second oiling unit; 121 is the first oil tank; 122 is the first oil nozzle; 131 is the second oil tank; and 132 is the second oil nozzle. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-2 The present invention provides the following technical solution: The system includes a secondary oiling system, equipped with a two-component oiler 1. The secondary oiling system comprises industrial yarn 2, a feed roller, a pretension roller 3, a first pair of drafting rollers 4, a second pair of drafting rollers 5, a heating roller 6, a relaxation roller 7, and a winding roller 8. The industrial yarn 2 sequentially passes through the pretension roller 3, the feed roller, the first pair of drafting rollers 4, the second pair of drafting rollers 5, the heating roller 6, and the relaxation roller 7 before finally entering the winding roller 8. The relaxation roller 7 and the heating roller 6 are arranged vertically along the direction of gravity. The two-component oiler 1 is fixedly positioned between the relaxation roller 7 and the heating roller 6. The heating roller 6 is set to a temperature of 220-250℃, and the relaxation roller 7 is set to a temperature greater than or equal to 160℃. (Polyester) After the chips are melt-extruded by a screw, they are extruded through a spinneret, cooled by air, and pass through a tunnel. They are then initially oiled and subsequently sent to a secondary oiling system for secondary oiling. The secondary oiling agent is a two-component oiling agent, which is applied through a two-component oiler 1 installed between the relaxation roller 7 and the heating roller 6. After the industrial yarn 2 is initially stretched by the first pair of drawing rollers 4 and the second pair of drawing rollers 5, it enters the heating roller 6 zone for heating. The speed difference between the heating rollers 6 achieves further stretching of the industrial yarn 2. After completing the hot stretching, the industrial yarn 2 is sent to the oiler for a second oiling process. Finally, it undergoes hot relaxation treatment by the relaxation roller 7 and is then wound into shape to produce functional polyester industrial yarn 2.

[0026] The two-component oiler 1 includes a pre-oiler 11 fixedly installed. A first oiling unit 12 and a second oiling unit 13 are fixedly installed on the bottom and top walls of the pre-oiler 11, respectively. The first oiling unit 12 includes a first oil tank 121 and a first oil nozzle 122 fixedly installed on the pre-oiler 11. A first oil pump connected to the first oil nozzle 122 is fixedly installed inside the first oil tank 121. The second oiling unit 13 includes a second oil tank 131 and a second oil nozzle 132 fixedly installed on the pre-oiler 11. The fuel injector 132 has a first fuel tank 121 containing a sufficient amount of the first component fuel agent. A second fuel pump, connected to the second fuel injector 132, is fixedly installed inside the second fuel tank 131. Both the first and second fuel pumps are metering pumps. The second fuel tank 131 contains a sufficient amount of the second component fuel agent. Both the first and second fuel injectors 122 and 132 are designed with bottom outlets. The air pressure of the pre-circuit device 11 is 0.5-1.5 kPa. The fuel output of the bottom injector is 0.5-4 g / min, and the fuel output of the top injector is... The oil output from the lower nozzle is 10%-60%, controlled by a metering oil pump. After the industrial yarn 2 is heated by the heating roller 6 to a temperature of 220-250℃, the first component oil is first added to the industrial yarn 2. The industrial yarn 2 then undergoes pre-network treatment to successfully homogenize the first component oil, which can work with the penetrant to further improve the penetration effect. Next, the second component oil is added to the industrial yarn 2 through the upper nozzle, realizing the combined distribution of the two components oil on the surface of the industrial yarn 2. The industrial yarn 2 is then treated by the relaxation roller 7 at 160℃, allowing the first and second components to react fully. Before winding, the oiling and heating activation reaction of the two components oil are completed. At the same time, the relaxation roller 7 is made of chrome-plated material with a surface roughness Ra value of 1.8-2.5 micrometers. By optimizing the coating material and roughness of the relaxation roller 7, the coking of the two components oil on the roller can be effectively reduced, further ensuring the pre-activation effect of the two components oil on the yarn bundle.

[0027] The first component oiling agent consists of 30-60 parts by weight of waterborne multifunctional epoxy resin, 5-20 parts by weight of epoxy diluent, 20-40 parts by weight of solvent water, 0.1-2 parts by weight of penetrant, and 10-30 parts by weight of surfactant. The second component oiling agent is 1-5 parts by weight of sodium carbonate aqueous solution.

[0028] The waterborne multifunctional epoxy resin is one or both of glycerol glycidyl ether and sorbitol glycidyl ether.

[0029] The penetrant is sodium diisooctyl sulfosuccinate.

[0030] The surfactant is one or more of the following: polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene ether potassium phosphate, and glycol oleate.

[0031] The most readily achievable polyester industrial yarn 2 has a linear density of 930-3300 dtex, a breaking strength greater than 7.0 cN / dtex, and an oil content greater than 0.3%. The main components are polyol glycidyl ethers and epoxy diluents. A penetrant is added to the surface of the industrial yarn 2 to enhance the penetration of the oil into the fiber, aiding in activation. The added oiliness agent and surfactant lubricate and bundle the yarn, while the surfactant improves the dispersion and stability of the oil system in water. This reduces fuzzing during subsequent twisting and weaving processes, improving processing throughput. Sodium carbonate, as an inorganic non-metallic catalyst, lowers the activation energy of the epoxy resin crosslinking reaction, promoting the chemical reaction process of epoxy resin on the surface of the industrial yarn 2.

[0032] The two-component combination ultimately achieves surface activation treatment on the surface of industrial filament 2. Compared with the formulation disclosed in patent number 202411979960.7, the existing technology involves a single-component premix followed by organic amine / isocyanate curing, and first uses an inorganic non-metallic catalyst to catalyze the ring-opening polymerization of epoxy resin. In this invention, the use of a two-component oiler 1 in conjunction with the process improvement not only successfully integrates the heating catalysis process into the existing process without damage, but also only adds the two-component oiler 1 without requiring an additional heat source. The two-component separate placement design can well match the "room temperature stability and high temperature activity" characteristics of the sodium carbonate catalytic system. Furthermore, the optimization and improvement of the secondary oiling position takes into account the specific positional relationship between the relaxation roller 7 and the heating roller 6, providing a precise temperature window for sodium carbonate catalysis. Examples 1-12 1. Linear density, determined according to method GB / T 4743; strength, determined according to method GB / T 14344-2008.

[0033] 2. Evaluation of rubber bonding performance, determined according to the method of FZ / T 54087—2016.

[0034] In the production process of industrial yarn 2, the raw yarn passes through a tunnel, undergoes initial oiling, and after the first pair of rollers, it enters the hot drawing roller group for heating before entering the secondary oiling system. In the secondary oiling system, the first group of oil containing epoxy resin is delivered to the raw yarn through a metering pump from the lower oil nozzle, and the second group is delivered to the raw yarn through a metering pump from the upper oil nozzle. Subsequently, the raw yarn undergoes heat treatment at relaxation roller 7 (≥110℃) to complete the winding process.

[0035] Subsequently, the yarn is impregnated with RFL adhesive once, with the impregnation temperature controlled at 220℃ for 1 minute. After impregnation, the yarn is vulcanized with rubber and the adhesion is tested (including H pull-out and CRA peel strength) to evaluate the activator system.

[0036] Table 1 Examples 1-6

[0037] Table 2 Examples 7-12

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated oiling system and production device for functional polyester industrial yarn, characterized in that: The system includes a secondary oiling system, which is equipped with a two-component oiler (1). The secondary oiling system includes industrial yarn (2), a pretension roller (3), a feed roller, a first pair of drawing rollers (4), a second pair of drawing rollers (5), a heating roller (6), a relaxation roller (7), and a winding roller (8). The industrial yarn (2) passes through the pretension roller (3), the feed roller, the first pair of drawing rollers (4), the second pair of drawing rollers (5), the heating roller (6), and the relaxation roller (7) in sequence before finally being connected to the winding roller (8). The relaxation roller (7) and the heating roller (6) are arranged vertically along the direction of gravity. The two-component oiler (1) is fixedly installed between the relaxation roller (7) and the heating roller (6).

2. The integrated oiling system and production device of a functional polyester industrial yarn according to claim 1, characterized in that: The two-component oiler (1) includes a pre-network device (11) fixedly installed. A first oiling unit (12) and a second oiling unit (13) are fixedly installed on the bottom and top walls of the pre-network device (11), respectively. The first oiling unit (12) includes a first oil tank (121) and a first fuel injector (122) fixedly installed on the pre-network device (11). A first oil pump connected to the first fuel injector (122) is fixedly installed inside the first oil tank (121). The second oiling unit (13) includes... A second oil tank (131) and a second fuel injector (132) are fixedly installed on the pre-network device (11). The first oil tank (121) contains a sufficient amount of first component oil. The second oil tank (131) contains a second oil pump that is connected to the second fuel injector (132). The first oil pump and the second oil pump are metering oil pumps. The second oil tank (131) contains a sufficient amount of second component oil. Both the first fuel injector (122) and the second fuel injector (132) are designed with a bottom outlet.

3. The integrated oiling system and production device of a functional polyester industrial yarn according to claim 2, characterized in that: The first component oiling agent comprises 30-60 parts by weight of waterborne multifunctional epoxy resin, 5-20 parts by weight of epoxy diluent, 20-40 parts by weight of solvent water, 0.1-2 parts by weight of penetrant, and 10-30 parts by weight of surfactant. The second component oiling agent is 1-5 parts by weight of sodium carbonate aqueous solution.

4. The integrated oiling system and production apparatus for functional polyester industrial yarn according to claim 3, characterized in that: The waterborne multifunctional epoxy resin is one or both of glycerol glycidyl ether and sorbitol glycidyl ether.

5. The integrated oiling system and production apparatus for functional polyester industrial yarn according to claim 3, characterized in that: The penetrant is sodium diisooctyl sulfosuccinate.

6. The integrated oiling system and production apparatus for functional polyester industrial yarn according to claim 3, characterized in that: The surfactant is one or more of the following: polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene polyoxypropylene ether, fatty alcohol polyoxyethylene ether potassium phosphate, and glycol oleate.

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