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Paraffin
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Properties: paraffin wax, also known as crystalline wax, is usually a white, tasteless wax like solid, melted at 47 ° C-64 ° C, with a density of about 0.9g/cm3, soluble in gasoline, carbon disulfide, xylene, ether, benzene, chloroform, carbon tetrachloride, naphtha and other non-polar solvents, insoluble in water and methanol and other polar solvents. Pure paraffin is a good insulator, its resistivity is 1013-1017 ohm · m, higher than most materials except some plastics (especially Teflon). Paraffin is also a good heat storage material, with a specific heat capacity of 2.14-2.9j · g-1 · k-1 and a melting heat of 200-220j · g-1. The main performance indexes of paraffin are melting point, oil content and stability.


Main use: crude paraffin is mainly used for making matches, fiberboard, awning canvas, etc. due to its high oil content. When polyolefin additives are added to paraffin wax, its melting point increases and its adhesion and flexibility increase. It is widely used in the production of moisture-proof and waterproof packaging paper, cardboard, surface coating of some textiles and candles.


It can be used in food, medicine and other packaging, metal antirust and printing industries; after paraffin is added to cotton yarn, it can make textile soft, smooth and elastic; paraffin can also be used to make detergent, emulsifier, dispersant, plasticizer, grease, etc.

Fully refined paraffin and semi refined paraffin wax are widely used. They are mainly used as ingredients and packaging materials for food, oral medicine and certain commodities (such as wax paper, crayons, candles, carbon paper), coating materials for baking containers, preservation of fruits, insulation of electrical components, improvement of rubber aging resistance and flexibility. It can also be used for oxidation to produce fatty acids.


Paraffin, as a kind of latent energy storage material, has the advantages of large latent heat of phase change, small volume change of solid-liquid phase change process, good thermal stability, no supercooling phenomenon and low price. With the development of aviation, aerospace, microelectronics and Optoelectronics Technology, it is often required that a large amount of heat dissipation generated by high-power components can only be dissipated in a limited heat dissipation area and a very short time, while the low melting point phase change materials can reach the melting point relatively quickly compared with the high melting point phase change materials, making full use of the latent heat to achieve temperature control, and the thermal response time is relatively short, which is due to many advantages of paraffin Aviation, aerospace, microelectronics and other high-tech systems as well as housing energy saving and other fields have been widely used.


GB 2760-96 stipulates that it is allowed to be used as the basic agent of gum sugar, with a limit of 50.0g/kg. It is also used in the production of glutinous rice paper at the dosage of 6G / kg. In addition, it is also widely used in food packaging materials, such as moisture-proof, anti stick and anti oil. It is applicable to the components of food gum, bubble gum and drug normal gold oil, as well as the wax used for direct contact with food and drug, such as heat carrier, demoulding, tablet pressing, polishing, etc. (made of the wax containing fraction of oil or shale oil by cold pressing, etc.).


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selina@shengtuochemical.com

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