Properties of Fischer-Tropsch wax
Fischer-Tropsch waxes consist of small amounts of linear, saturated, high-carbon alkanes with methyl branches, with a relative molecular weight of 500 to 1000 and carbon numbers of C20 to C80. Its chemical properties are stable at room temperature, almost free of sulfur, nitrogen, aromatic hydrocarbons and other impurities, and its chemical composition can meet the requirements of food grade. Compared with petroleum wax, it has the characteristics of high melting point, narrow melting point range, low permeability, low oil content, low melt viscosity, low fluidity, high hardness, high wear resistance and high stability.
Fischer-Tropsch waxThe characteristics
Fischer-Tropsch wax is composed of a small amount of linear saturated high-carbon alkanes with methyl branches, and its relative molecular weight is 500~1000. The carbon number is C20 ~ C80. Its chemical properties are stable at room temperature, almost free of sulfur, nitrogen, aromatic hydrocarbons and other impurities, and its chemical composition can meet the requirements of food grade. Compared with petroleum wax, it has the characteristics of high melting point, narrow melting point range, low permeability, low oil content, low melt viscosity, low fluidity, high hardness, high wear resistance and high stability. According to the melting point or freezing point, the domestic Fischer-Tropsch wax products are mainly 60#, 70#, 85#, 95#, 100#, 105# and 110.
The structure and properties of Fischer-Tropsch wax molecular wax with a melting point lower than 70 are similar to paraffin wax. It can be used as a substitute for partial paraffin wax and a modifier for paraffin wax to improve the dropping point and hardness. After appropriate isomerization, Fischer-Tropsch waxes with a melting point of 70-100 can be used in some applications instead of microcrystalline waxes. The Fischer-Tropsch wax molecule with a melting point higher than 100 is between petroleum wax and plastic. In principle, it can no longer be called wax. It is a synthetic material and has little to do with the application field of petroleum wax. At present, high melting point Fischer-Tropsch wax mainly depends on imports, the application field is more extensive. Based on the many advantages of Fischer-Tropsch wax, it can be widely used in rubber protection, hot melt adhesive, investment casting, polishing agent, electric power, food, cosmetics, agriculture and other fields
Fischer-Tropsch waxCan be used in the field of ink. Ink is a uniform and stable dispersion system composed of colorants, binders and various additives. Colorant is the main component of the ink, can make the print has a rich and colorful color, so that the ink has a certain rheological properties. The binder is the carrier of the pigment particles, which makes the pigment particles evenly dispersed, and at the same time plays the role of transferring the colorant to the surface of the printed matter and fixing it, so that the ink has fluidity and printing ability. It is also a film-forming substance that affects the drying and quality of the ink. The addition of additives can improve the performance of the ink to meet various printing conditions. Ink-specific waxes include polyethylene wax, teflon wax and Fischer-Tropsch wax. Wax usually acts as an anti-friction additive in the ink, which can change the working performance of the ink and improve the anti-slip and wear resistance of the ink.
The frictional resistance of wax depends mainly on its particle size and hardness. The wax used in the ink field is mainly spherical particles and micropowder products with low surface tension. The size of the wax particles should be as small as possible, so as to ensure that there will be no adverse effects in production and no problems in printing. Wax printed on the substrate, should be able to float on the ink film, can increase the friction resistance. Once the printed matter generates heat due to friction under external pressure, the wax particles will roll, increasing its frictional resistance. The amount of wax added to the ink must be moderate. Excessive amounts affect the fluidity, transferability and gloss of the ink. Fischer-Tropsch wax can be used to prepare special wax for sealed bottle crafts. Bottle crafts are made of glass bottles filled with flowers, fruits, transparent liquid and other decorations. In order to prevent the leakage of liquid in the bottle crafts, special sealing wax is usually used to seal the bottle crafts.
In the process of making handicrafts, special sealing wax is required to have strong adhesion, smooth surface, no cracks, and not easy to break under external force. In view of the above requirements, the special wax for bottle sealing process must meet the following indicators: the melting point is lower than 70. when used, it will not produce smoke, the wax can quickly solidify, is convenient for continuous, automatic, high-speed operation, good film-forming performance, strong adhesion, certain hardness and toughness, and low price. In order to reduce the cracks of the special wax for bottle workers and improve its brittleness and hardness, a small amount of wax with low melting point, high isomeric hydrocarbon content, large permeability, high toughness and flexibility, and good low temperature performance is added to the special wax for bottle workers.Fischer-Tropsch waxTemperature wax that can be used as a temperature control valve. Thermostatic valves are widely used to control the temperature and flow of fully automatic equipment.
Its core component is a temperature-sensitive wax-type thermal element, which determines the temperature control range and accuracy of the temperature control valve. Wax as a heat-sensitive filling medium should be appropriately selected within the melting point range. The principle is that within the phase transition temperature range, wax will drive the components to change the flow of hot and cold fluids by increasing the intermolecular distance and volume expansion, thereby ensuring that the temperature of the fluid at the outlet of the pipeline remains within a constant range. Melting point and melting point range are the most important factors affecting the expansion rate of temperature-sensitive wax in application. In addition, the expansion rate of isoparaffins is generally lower than that of normal alkanes with the same carbon number, and the main component of temperature-sensitive wax is normal alkanes.