Application of Toynol® Surfactants in Chemical Fiber Oils

Application of Toynol® Surfactants in Chemical Fiber Oils

Chemical fiber oils, as critical auxiliaries in synthetic fiber production, significantly impact spinning process stability and fiber quality. Surfactants, being the core components of these oils, play an indispensable role in reducing surface tension, improving wettability, and providing antistatic properties. The Toynol® series of surfactants, based on an innovative acetylenic diol polyether structure, possess unique dynamic surface tension characteristics, offering a novel solution for optimizing the performance of chemical fiber oils. This article provides an in-depth exploration of the application characteristics and technical advantages of Toynol® surfactants in chemical fiber oils.

1.1 Core Importance of Dynamic Surface Tension
In high-speed spinning processes, where fiber line speeds typically reach 3000-6000 m/min, the oil must wet and spread over the fiber surface within milliseconds. Dynamic Surface Tension (DST) becomes a key indicator for evaluating the application performance of fiber oils. Traditional static surface tension measurements are insufficient for high-speed spinning process requirements. The excellent DST performance of Toynol® surfactants effectively addresses this technical challenge.
1.2 Comprehensive Performance Requirements
Surfactants for chemical fiber oils need to possess the following characteristics: rapid wetting capability, good thermal stability, excellent emulsification, appropriate smoothness, effective antistatic properties, and good compatibility with fibers and other additives. The Toynol® series, through molecular structure design, demonstrates significant advantages in these aspects.

2.1 Unique Acetylenic diol Polyether Structure
Toynol® surfactants utilize an innovative acetylenic diol polyether structure. This "Gemini structure" gives them significantly higher efficiency in interfacial adsorption and alignment compared to traditional surfactants. FS-640, FS-660, and Superwet-340 are all based on this core structure but differ in molecular chain length and Hydrophilic-Lipophilic Balance (HLB) value to meet different application needs.
FS-640 has a lower cloud point (30-35°C). The dynamic surface tension of its 0.1% aqueous solution is as low as 35.1 dyn/cm, making it particularly suitable for medium-to-low temperature spinning processes. FS-660 has a higher cloud point (60-64°C) and better water solubility, suitable for high-temperature spinning conditions. Superwet-340 exhibits the best performance in dynamic surface tension, at only 32.6 dyn/cm, providing ideal wetting properties for high-speed spinning.
2.2 Excellent Dynamic Surface Tension Characteristics
Experimental data indicate that Toynol® surfactants have significant advantages in reducing dynamic surface tension:
 Superwet-340: Static surface tension 30.6 dyn/cm, Dynamic surface tension 32.6 dyn/cm
 FS-640: Static surface tension 33.7 dyn/cm, Dynamic surface tension 35.1 dyn/cm
 FS-660: Static surface tension 41.2 dyn/cm, Dynamic surface tension 43.5 dyn/cm
This rapid DST reduction capability ensures the oil can instantaneously spread on the surface of high-speed moving fibers, forming a uniform oil film, and effectively prevents issues like fiber fuzzing and breakage due to delayed wetting.
2.3 Wide Temperature Adaptability
Chemical fiber spinning processes involve various temperature conditions, from room temperature to high-temperature processes exceeding 300°C. Toynol® surfactants achieve optimized temperature adaptability by adjusting the cloud point:
 FS-640 is suitable for room temperature to medium temperature conditions (cloud point 30-35°C)
 Superwet-340 is suitable for a wide temperature range (cloud point 38-45°C)
 FS-660 is suitable for high-temperature process conditions (cloud point 60-64°C)
This temperature adaptability allows formulation engineers to select the appropriate surfactant model based on specific spinning temperatures.

3.1 Application in High-Speed Spinning Oils
In high-speed spinning processes such as polyester POY and FDY, the oil must wet the fiber in an extremely short time. Toynol® Superwet-340, with its excellent dynamic surface tension characteristics (32.6 dyn/cm), can meet the wetting requirements for ultra-high-speed spinning exceeding 6000 m/min. Its ability to rapidly migrate to newly formed interfaces ensures instantaneous spreading of the oil on the fiber surface, effectively reducing spinning breakage rates.
3.2 Application in Spinning Oils for Profiled Fibers
Profiled fibers (e.g., triangular, hollow cross-sections) have a specific surface area more than 30% larger than circular fibers, posing higher demands on the wettability of the oil. The low dynamic surface tension characteristic of Toynol® FS-640 (35.1 dyn/cm), combined with its good permeability, ensures uniform distribution of the oil on complex fiber surfaces, preventing spinning faults caused by uneven wetting.
3.3 Application in High-Temperature Spinning Oils
For fibers like nylon and aramid that require high-temperature spinning, the oil needs good thermal stability. Toynol® FS-660, with its high cloud point (60-64°C) and thermal stability, maintains excellent wetting performance under high-temperature conditions, preventing roller coking caused by surfactant decomposition.
3.4 Application in Multifunctional Composite Oils
Modern chemical fiber oils are trending towards multifunctionality, requiring surfactants to provide emulsifying and antistatic functions alongside wetting. The Toynol® series exhibits good compatibility with anionic surfactants, enabling synergistic effects of wetting, emulsification, and antistatic properties through scientific formulation design.

4.1 Significantly Improved Wetting Efficiency
Compared to traditional fatty alcohol polyoxyethylene ethers, Toynol® surfactants reduce dynamic surface tension by 20%-30% at the same concentration. This means lower addition amounts can achieve the same wetting effect in oil formulations, helping to reduce oil cost and minimize residue.
4.2 Excellent Foam Control Capability
FS-640 specifically emphasizes its foam control and suppression functions, which is particularly important in high-speed spinning processes. Excessive foam can affect the uniform application of the oil and even lead to spinning interruptions. This characteristic of Toynol® ensures the stability of the spinning process.
4.3 Outstanding Environmental Safety
All Toynol® surfactants are APEO-free, complying with EU REACH regulations and other environmental requirements, meeting the demand for environmentally friendly auxiliaries in the modern textile industry. This is significant for the sustainable development of export-oriented chemical fiber enterprises.
4.4 Wide Compatibility
The Toynol® series exhibits good compatibility with various resin systems and other additives. This characteristic allows it to exist stably in complex formulations of chemical fiber oils without affecting the overall performance of the oil due to compatibility issues.

5.1 Formulation Design Principles
In the formulation design of chemical fiber oils, the addition amount of Toynol® surfactants is typically 0.3%-1.0%, with the specific dosage to be determined through gradient tests. It is recommended to add them after other surfactants and polymers but before adding pigments, fillers, and other solid materials to facilitate their dissolution, dispersion, and wetting of solids.
5.2 Process Adaptability Adjustments
Different Toynol® products should be selected according to different spinning process conditions:
 High-speed spinning: Priority given to Superwet-340
 High-temperature spinning: Recommended use of FS-660
 Ordinary spinning: FS-640 can be chosen for better cost-effectiveness
5.3 Quality Control Points
Storage conditions must be strictly controlled during use, avoiding high temperatures and humid environments. If the product solidifies or crystallizes (which may occur at low temperatures), simply heating to room temperature and stirring thoroughly will restore it to its original state without affecting performance.

As the chemical fiber industry develops towards higher speeds, specialization, and environmental friendliness, higher demands are placed on surfactants for oils. Toynol® surfactants have development potential in the following areas:
6.1 Personalized Customization Services
Dedicated models of Toynol® surfactants can be developed for different fiber types and spinning processes, such as products specialized for microfibers, high-elasticity fibers, and other differentiated applications.
6.2 Intelligent Function Expansion
Integrating with IoT technology, intelligent surfactants capable of automatically adjusting performance based on spinning process parameters could be developed, enabling intelligent control of oil performance.
6.3 Green and Sustainable Development
Further development of acetylenic diol surfactants produced from bio-based raw materials can reduce the carbon footprint and promote the green development of the chemical fiber industry.

Toynol® surfactants, leveraging their unique acetylenic diol polyether structure and excellent dynamic surface tension characteristics, demonstrate significant advantages in chemical fiber oil applications. Their rapid wetting ability, good temperature adaptability, and excellent compatibility enable them to meet the stringent requirements of modern high-speed spinning processes. With the continuous development of chemical fiber technology, Toynol® surfactants are expected, through ongoing innovation, to provide more efficient and environmentally friendly solutions for the chemical fiber industry, promoting technological advancement and industrial upgrading in China's chemical fiber sector.
For specific applications, it is recommended that chemical fiber enterprises, based on their own spinning process conditions and fiber types, select the most suitable Toynol® model and dosage through systematic experimental verification to achieve the best application results and economy. Meanwhile, establishing close technical cooperation with suppliers is encouraged to jointly promote the optimization and innovation of chemical fiber oil formulations.