High-wettability special-shaped polyester fiber spinning oil and preparation method thereof

Abstract

The invention relates to high-wettability special-shaped polyester fiber spinning oil and a preparation method thereof. The preparation method comprises the following steps: weighing and preparing required materials according to actual use requirements; the method comprises the following steps: pre-balancing the materials under the condition of 35-45 DEG C before feeding; sequentially adding a smoothing agent, a bundling agent, an antistatic agent, a wetting and penetrating agent, an anti-coking agent and a wetting and penetrating auxiliary agent, and fully and uniformly mixing the materials in a manner of adding materials while stirring; the oiling agent disclosed by the invention is high-wettability special-shaped polyester fiber spinning oiling agent, and contains 5-10wt% of a main wetting and penetrating agent consisting of isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate, and also contains a wetting and penetrating auxiliary agent; due to the addition of the wetting and permeating auxiliary agent, the wetting and permeating performance of the oiling agent is greatly improved, the wetting and permeating performance of the oiling agent is excellent, and the oiling agent can well adapt to the production process of the special-shaped polyester fibers.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning oils, and in particular relates to a high-wettability special-shaped polyester fiber spinning oil and a preparation method thereof. Background Art

[0002] With the rapid development of the textile industry, the industrial production of synthetic fibers has increased rapidly. By 2023, the global synthetic fiber market has accounted for more than 70% of the total fiber market. Although traditional synthetic fibers still dominate the market, they face challenges such as single products, low added value and homogeneous performance, and are gradually unable to meet the increasingly diverse market needs. At this time, shaped fibers, as an innovative solution, can effectively deal with these problems. The shape and size of shaped fibers can be designed according to different application requirements, thereby significantly improving the performance of the material. Its unique shape makes up for the shortcomings of round fibers in torsional strength, roughness, elasticity, appearance and other properties, and has good gloss, dyeing, anti-fouling, flame retardant, heat insulation, sound insulation and other properties. It has been widely used in textiles, composite materials, construction, biomedicine, automobiles, aerospace, optics and other fields.

[0003] Since shaped fibers have a larger specific surface area, they absorb more oil than round fibers at the same spinning speed, which places higher demands on the wettability of spinning oils. However, traditional spinning oils often have difficulty in quickly and fully wetting the fibers, resulting in the inability to form a uniform oil film on the fiber surface. This will increase the frictional resistance between the fiber and the air, as well as the friction between the fiber and the wire guide, thus affecting the spinnability of the fiber and the feel of the fabric.

[0004] The paper "Performance and Application of FM-115 Special Oil for Glossy Shaped Polyester FDY" Synthetic Fiber Industry, 2024, 47(03): 42-46 reported the special oils FM-115 and F1724 for glossy shaped polyester FDY, and compared the performance of the two oils. The surface tensions of the two oil emulsions were 29.1 mN / m and 31.3 mN / m, respectively. This is because the addition of an appropriate amount of sodium dioctyl sulfonate succinate in the formula of the oil FM-115 reduces the surface tension of the oil, thereby improving the wettability of the spinning oil. However, sodium dioctyl sulfonate succinate has strong foaming properties, resulting in uneven coverage of the oil on the fiber surface, thus affecting the quality of the fiber product.

[0005] Patent CN1811050A discloses a polyester FDY nano spinning oil and its preparation method, in which inorganic nano additives are added to the spinning oil to increase the overall performance of the oil, and the surface tension of the prepared spinning oil (10% aqueous solution) is 34.9 mN / m. However, inorganic nano additives are prone to uneven dispersion, resulting in a decrease in the performance of the spinning oil.

[0006] In summary, the existing spinning oil for shaped polyester fibers has problems such as insufficient wettability and agglomeration and precipitation between the oil components. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention aims to provide a high-wettability special-shaped polyester fiber spinning oil and a preparation method. The special-shaped polyester fiber spinning oil disclosed in the present invention has excellent wettability, and no agglomeration, precipitation, etc. will occur between the oil components.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A high-wettability special-shaped polyester fiber spinning oil contains 5-10wt% of a main wetting and penetrating agent; the main wetting and penetrating agent is composed of isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate in a mass ratio of 2-2.5:0.5-1.

[0009] It is emphasized that the content of the main wetting and penetrating agent in the high wettability special-shaped polyester fiber spinning oil of this scheme does not exceed 10wt%, otherwise, the viscosity of the high wettability special-shaped polyester fiber spinning oil may increase, thereby affecting the wettability of the oil.

[0010] Isotridecyl polyoxyethylene polyoxypropylene ether is a type of nonionic surfactant. Its molecular structure contains a hydrophilic polyoxyethylene part and a hydrophobic polyoxypropylene part, which can effectively reduce the surface tension of the oil, thereby enhancing the contact between the oil and the fiber surface and improving the wetting and penetration effect. In addition, the molecule also contains a branched alkyl group, which increases the steric hindrance of the molecule, provides more contact area, and effectively reduces the surface tension of the oil, thereby improving its wetting and penetration performance.

[0011] The molecular structure of pentaerythritol oleate has four groups of symmetrical chains, which greatly increases the rigidity of the molecular chain, thereby increasing the wear resistance of the oil; the molecular structure of pentaerythritol oleate exhibits amphiphilicity. This dual property enables it to have good wetting ability at the oil-water interface, which can effectively reduce the surface tension, thereby promoting the spreading of the oil on the fiber surface.

[0012] Furthermore, the high wettability special-shaped polyester fiber spinning oil also contains 3-5wt% of a wetting and penetrating aid, and the wetting and penetrating aid is cocamidopropyl hydroxysulfobetaine.

[0013] Cocamidopropyl Hydroxysulfobetaine can synergize with the main wetting and penetrating agent to enhance its wetting and penetrating properties. As an excellent amphoteric surfactant, it has both anionic hydrophilic groups (sulfonic acid groups) and cationic hydrophilic groups (quaternary ammonium salt groups). When it is mixed with the main wetting and penetrating agent, the anionic head group is inserted between the zwitterionic head groups, so that the surfactant molecules form a denser liquid film, and its ability to reduce surface tension is enhanced, thereby enhancing its spreading and wetting ability.

[0014] Furthermore, the high wettability special-shaped polyester fiber spinning oil also contains 55-65wt% of a smoothing agent, and the smoothing agent is white oil.

[0015] Furthermore, the high wettability special-shaped polyester fiber spinning oil also contains 5-10wt% of a sizing agent, which is one or a combination of coconut oil diethanolamide and polyethylene glycol 400 oleate.

[0016] Furthermore, the high wettability special-shaped polyester fiber spinning oil also contains 15-20wt% of an antistatic agent, which is one or a combination of isomeric tridecanol phosphate salt and isomeric tridecanol polyoxyethylene ether sodium sulfate. The molecular structure of the antistatic agent can reduce the interaction force between molecules, making the oil easier to penetrate and wet the fiber surface; in addition, after it is matched with the wetting aid, a synergistic effect will be produced, so that the overall wettability and emulsification of the oil are improved.

[0017] Since the wetting effect of traditional polyester fiber spinning oil is poor, it is often difficult to quickly and fully wet the fiber, and it cannot meet the spinning production of special-shaped fibers. The present invention enhances the wetting and penetration effect of the special-shaped polyester fiber spinning oil by studying the action mode of the wetting and penetrating agent and the wetting and penetrating aid in the oil formula and their synergistic effect.

[0018] As the preferred technical solution: The high wettability special-shaped polyester fiber spinning oil as described above also contains 2-5wt% of an anti-coking agent, which is a double-terminated surfactant of fatty acid methyl ester ethoxylate.

[0019] The high wettability spinning oil for shaped polyester fibers as described above has a spinning speed of 4600 m / min, a stretching temperature of 105° C., and a setting temperature of 135° C. during the spinning process of the shaped polyester fibers.

[0020] The present invention also provides a method for preparing a high-wettability special-shaped polyester fiber spinning oil, comprising the following steps: S1. Material preparation Weigh and prepare the materials required according to actual usage requirements; S2. Material preparation 1) Preparation steps: add smoothing agent, sizing agent, antistatic agent, main wetting and penetrating agent, anti-coking agent, and wetting and penetrating aid in sequence, wherein each material is pre-balanced at 35°C to 45°C before adding, and the material is added while stirring to ensure that each material is fully mixed; Preferably, the temperature of the reactor in which the various materials are mixed is controlled at 35° C. to 45° C., the stirring speed is set at 600 to 800 r / min, and the reaction is carried out for 1 to 2 hours to obtain a high wettability special-shaped polyester fiber spinning oil.

[0021] Beneficial effects: (1) The oil of the present invention uses a combination of isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate as the main wetting and penetrating agent to greatly improve the wetting and penetrating properties of the oil, so that the oil can quickly and evenly cover the fiber and make spinning proceed smoothly.

[0022] (2) The wetting and penetrating aid used in the oil of the present invention can work synergistically with the main wetting and penetrating agent to enhance the wetting and penetrating properties of the oil. This can make the surfactant molecules form a denser liquid film, thereby enhancing their ability to reduce surface tension and thus enhancing their spreading and wetting abilities.

[0023] (3) The oil of the present invention uses isomeric tridecanol phosphate and isomeric tridecanol polyoxyethylene ether sodium sulfate as antistatic agents, which not only have excellent antistatic properties, but can also be compatible with wetting and penetration aids to produce a synergistic effect and enhance the overall wettability of the oil.

[0024] (4) The oil of the present invention gives full play to the structure-activity relationship and synergistic effect of each component and the performance of the oil, so that the wetting and permeability of the oil is greatly improved. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0026] The following are the performance test methods in each embodiment: Conductivity (10% aqueous solution): Water was added to the oil prepared in the following examples, with the water accounting for 10% of the total solution, measured according to GB / T11007; Wettability: At 25°C, measure the wetting time of the sample according to GB / T 11983-2008 "Determination of the wetting power of surfactants by immersion method"; Surface tension (1% aqueous solution): measured at 25°C using a QBZY platinum plate surface tension meter (QBZY-1, Shanghai Fangrui Instrument Co., Ltd.); Fiber specific resistance: measured using an automatic digital fiber specific resistance meter in accordance with GB / T14342-2015; Fiber friction coefficient: measured by LFY-110 yarn dynamic friction tester (LFY-110, Shandong Textile Science Research Institute); Oil content: The oil content was determined using a fiber grease quick extractor (Model YG981, Changzhou Shuanggu Dunda Electromechanical Technology Co., Ltd.) in accordance with the national standard GB / T6504-2008.

[0027] The following are the manufacturers and brands of the raw materials involved in the embodiments: Isotridecyl polyoxyethylene polyoxypropylene ether: manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd.; brand number: 78330-23-1 Pentaerythritol oleate: manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., brand number is 19321-40-5; Cocamidopropyl hydroxysulfobetaine: the manufacturer is Henan Tianfu Chemical Co., Ltd., the brand number is 68139-30-0; White oil (liquid paraffin): manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., brand number is 8042-47-5; Coconut oil diethanolamide: The manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., the brand number is 6863-42-9; Polyethylene glycol 400 oleate: manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., brand number is 9004-96-0; Isotridecyl phosphate: the manufacturer is Nantong Chenrun Chemical Co., Ltd. Isomeric tridecanol polyoxyethylene ether sodium sulfate: Guangdong Wengjiang Chemical Reagent Co., Ltd.; Fatty acid methyl ester ethoxylate type double-end-capped surfactant: manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., brand number is 65218-33-7; Example 1: A method for preparing a high-wettability special-shaped polyester fiber spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Isotridecyl polyoxyethylene polyoxypropylene ether; Pentaerythritol oleate; Wetting and penetration aid: cocamidopropyl hydroxysulfobetaine; Lubricant: white oil; Binder: Coconut oil diethanolamide; Antistatic agent: isomeric tridecanol phosphate; Anti-coking agent: fatty acid methyl ester ethoxylate type double-terminated surfactant; (2) Prepare the main wetting and penetrant agent; The main wetting and penetrating agent is prepared by mixing isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate in a mass ratio of 2:1; (3) Weigh 8 wt% of the main wetting and penetrating agent, 4 wt% of the wetting and penetrating aid, 60 wt% of the smoothing agent, 7 wt% of the sizing agent, 17 wt% of the antistatic agent, and 4 wt% of the anti-coking agent in proportion, and then pre-balance the materials at 40°C; then, add the smoothing agent, the sizing agent, the antistatic agent, the main wetting and penetrating agent, the anti-coking agent, and the wetting and penetrating aid in sequence while stirring; and then react at a temperature of 40°C and a stirring speed of 700 r / min for 1.5 h to obtain a high wettability special-shaped polyester fiber spinning oil.

[0028] The final high wettability special-shaped polyester fiber spinning oil is yellow and transparent, with an electrical conductivity of 1089 μS / cm, a wetting time of 4.59 s, and a surface tension of 25.8 mN / m.

[0029] The final obtained special-shaped polyester fiber has a fiber specification of 134dtex / 72f and a fiber specific resistance of 3.5×10 7 Ω.cm, the fiber friction coefficient is 0.447, and the oil content is 0.8%.

[0030] Comparative Example 1: A method for preparing a high-wettability special-shaped polyester fiber spinning oil is basically the same as Example 1, except that the main wetting and penetrating agent is composed only of isotridecanol polyoxyethylene polyoxypropylene ether.

[0031] The final high wettability special-shaped polyester fiber spinning oil is yellow and transparent, with a conductivity of 1056μS / cm, a wetting time of 6.77S, and a surface tension of 27.9 mN / m.

[0032] The final obtained special-shaped polyester fiber has a fiber specification of 133dtex / 72f and a fiber specific resistance of 4.7×10 7 Ω.cm, the fiber friction coefficient is 0.3455, and the oil content is 0.7%.

[0033] Comparative Example 2: A method for preparing a high-wettability special-shaped polyester fiber spinning oil is basically the same as Example 1, except that the main wetting and penetrating agent is composed only of pentaerythritol oleate.

[0034] The final high wettability special-shaped polyester fiber spinning oil is yellow and transparent, with an electrical conductivity of 1066μS / cm, a wetting time of 6.69s, and a surface tension of 27.1 mN / m.

[0035] The final obtained special-shaped polyester fiber has a fiber specification of 134dtex / 72f and a fiber specific resistance of 4.3×10 7 Ω.cm, the fiber friction coefficient is 0.329, and the oil content is 0.7%.

[0036] Example 2: A method for preparing a high-wettability special-shaped polyester fiber spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Isotridecyl polyoxyethylene polyoxypropylene ether; Pentaerythritol oleate; Wetting and penetration aid: cocamidopropyl hydroxysulfobetaine; Lubricant: white oil; Binder: Coconut oil diethanolamide; Antistatic agent: isomeric tridecanol phosphate; Anti-coking agent: fatty acid methyl ester ethoxylate type double-terminated surfactant; (2) Prepare the main wetting and penetrant agent; The main wetting and penetrating agent is prepared by mixing isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate in a mass ratio of 2:0.5; (3) Weigh 5 wt% of the main wetting and penetrating agent, 3 wt% of the wetting and penetrating aid, 65 wt% of the smoothing agent, 5 wt% of the sizing agent, 20 wt% of the antistatic agent, and 2 wt% of the anti-coking agent in proportion, and then pre-balance the materials at 35°C; then, add the smoothing agent, the sizing agent, the antistatic agent, the main wetting and penetrating agent, the anti-coking agent, and the wetting and penetrating aid in sequence while stirring; and then react at a temperature of 35°C and a stirring speed of 600 r / min for 1 hour to obtain a high wettability special-shaped polyester fiber spinning oil.

[0037] The final high wettability special-shaped polyester fiber spinning oil is yellow and transparent, with an electrical conductivity of 1207 μS / cm, a wetting time of 5.17 s, and a surface tension of 26.2 mN / m.

[0038] The final obtained special-shaped polyester fiber has a fiber specification of 134dtex / 72f and a fiber specific resistance of 2.9×10 7 Ω.cm, the fiber friction coefficient is 0.381, and the oil content is 0.8%.

[0039] Embodiment 3: A method for preparing a high-wettability special-shaped polyester fiber spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Isotridecyl polyoxyethylene polyoxypropylene ether; Pentaerythritol oleate; Wetting and penetration aid: cocamidopropyl hydroxysulfobetaine; Lubricant: white oil; Bunching agent: polyethylene glycol 400 oleate; Antistatic agent: isomeric tridecanol polyoxyethylene ether sodium sulfate; Anti-coking agent: fatty acid methyl ester ethoxylate type double-terminated surfactant; (2) Prepare the main wetting and penetrant agent; The main wetting and penetrating agent is prepared by mixing isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate in a mass ratio of 2.5:0.5; (3) Weigh 10 wt% of the main wetting and penetrating agent, 5 wt% of the wetting and penetrating aid, 55 wt% of the smoothing agent, 10 wt% of the sizing agent, 15 wt% of the antistatic agent, and 5 wt% of the anti-coking agent in proportion, and then pre-balance the materials at 45 °C; then, add the smoothing agent, the sizing agent, the antistatic agent, the main wetting and penetrating agent, the anti-coking agent, and the wetting and penetrating aid in sequence while stirring; and then react at a temperature of 45 °C and a stirring speed of 800 r / min for 2 h to obtain a high wettability special-shaped polyester fiber spinning oil.

[0040] The high wettability special-shaped polyester fiber spinning oil finally prepared is yellow and transparent, with an electrical conductivity of 1012 μS / cm, a wetting time of 5.51 s, and a surface tension of 26.7 mN / m.

[0041] The final obtained special-shaped polyester fiber has a fiber specification of 132dtex / 72f and a fiber specific resistance of 5.6×10 7 Ω.cm, the fiber friction coefficient is 0.3814, and the oil content is 0.9%.

[0042] Example 4: A method for preparing a high-wettability special-shaped polyester fiber spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Isotridecyl polyoxyethylene polyoxypropylene ether; Pentaerythritol oleate; Wetting and penetration aid: cocamidopropyl hydroxysulfobetaine; Lubricant: white oil; Sizing agent: a mixture of coconut oil diethanolamide and polyethylene glycol 400 oleate in a mass ratio of 2:1; Antistatic agent: a mixture of isomeric tridecanol phosphate and isomeric tridecanol polyoxyethylene ether sodium sulfate in a mass ratio of 1:1; Anti-coking agent: fatty acid methyl ester ethoxylate type double-terminated surfactant; (2) Prepare the main wetting and penetrant agent; The main antistatic agent is prepared by mixing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a mass ratio of 1.5:2; (3) Weigh 7 wt% of the main wetting and penetrating agent, 4 wt% of the wetting and penetrating aid, 64 wt% of the smoothing agent, 6 wt% of the sizing agent, 16 wt% of the antistatic agent, and 3 wt% of the anti-coking agent in proportion, and then pre-balance the materials at 37°C; then, add the smoothing agent, the sizing agent, the antistatic agent, the main wetting and penetrating agent, the anti-coking agent, and the wetting and penetrating aid in sequence while stirring; and then react at a temperature of 37°C and a stirring speed of 750 r / min for 1.5 h to obtain a high wettability special-shaped polyester fiber spinning oil.

[0043] The final high wettability special-shaped polyester fiber spinning oil is yellow and transparent, with an electrical conductivity of 1029 μS / cm, a wetting time of 5.77 s, and a surface tension of 26.9 mN / m.

[0044] The final obtained special-shaped polyester fiber has a fiber specification of 135dtex / 72f and a fiber specific resistance of 5.3×10 7 Ω.cm, the fiber friction coefficient is 0.317, and the oil content is 0.6%.

[0045] Those skilled in the art should understand that the technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A high wettability special-shaped polyester fiber spinning oil, characterized in that: Contains 5-10wt% of a main wetting and penetrating agent; the main wetting and penetrating agent is composed of a compound of isotridecanol polyoxyethylene polyoxypropylene ether and pentaerythritol oleate, wherein the mass ratio of isotridecanol polyoxyethylene polyoxypropylene ether to pentaerythritol oleate is 2-2.5:0.5-1.

2. The high wettability special-shaped polyester fiber spinning oil according to claim 1, characterized in that: The oil further contains 3-5wt% of a wetting and penetrating aid, which is cocamidopropyl hydroxysulfobetaine.

3. The high wettability special-shaped polyester fiber spinning oil according to claim 1, characterized in that: The oil also contains 55-65wt% of a lubricant, which is white oil.

4. The high wettability special-shaped polyester fiber spinning oil according to claim 1, characterized in that: The oil further contains 5-10 wt% of a sizing agent, which is one or a combination of coconut oil diethanolamide and polyethylene glycol 400 oleate.

5. The high wettability special-shaped polyester fiber spinning oil according to claim 1, characterized in that: The oil further contains 15-20wt% of an antistatic agent, which is one or a combination of isomeric tridecanol phosphate salt and isomeric tridecanol polyoxyethylene ether sodium sulfate.

6. The high wettability special-shaped polyester fiber spinning oil according to claim 1, characterized in that: The oil agent also contains 2-5wt% of an anti-coking agent, which is a double-terminated surfactant of the fatty acid methyl ester ethoxylate type.

7. A method for preparing a high-wettability special-shaped polyester fiber spinning oil, comprising preparing a high-wettability special-shaped polyester fiber spinning oil as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Smoothing agent, sizing agent, antistatic agent, main wetting and penetrating agent, anti-coking agent and wetting and penetrating aid are added in sequence. Before adding, each material is pre-balanced at 35°C ~ 45°C, and the materials are added while stirring to ensure that the materials are fully mixed.

8. The method for preparing a high-wettability special-shaped polyester fiber spinning oil according to claim 7, characterized in that: The temperature of the reactor containing various materials is controlled at 35°C~45°C, the stirring speed is set at 600~800r / min, and the reaction is carried out for 1~2h.