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Zircon sand, also known as zircon sand and zircon stone , is a mineral mainly composed of zirconium silicate. Pure zircon sand is a colorless and transparent crystal. It is often dyed in yellow, orange, red, brown and other colors due to different origins, types and amounts of impurities. The crystal structure belongs to the tetragonal crystal system , with a square pyramidal column shape and a specific gravity. 4.6~4.71. The change of specific gravity is sometimes related to the composition and alteration state . The cleavage of zircon is incomplete. The uniform Mohs hardness is 7~8, the refractive index is 1.93-2.01, and the melting point ranges from 2190~2420 depending on the impurities contained. Fluctuate within ℃. Zircon is a mineral composed primarily of zirconium, silicon and oxygen that crystallized from magma when igneous rocks were formed. Zircon is also found in dikes and metamorphic rocks . It belongs to the tetragonal crystal system , often in the form of well-deve...

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2月 17, 2024

Acid dyes refer to dye molecules containing acidic groups, also known as anionic dyes, which can be combined with amino groups in protein fiber molecules through ionic bonds and are suitable under acidic, weakly acidic or neutral conditions. Mainly azo and anthraquinone structures, a few are aromatic methane structures. Dyes and colors are generally compounds that have their own color and can make other substances obtain bright and firm colors in a molecular or dispersed state. Introduction Acid dyes have a complete chromatogram and bright colors. The light fastness and wet processing fastness vary greatly with different dye varieties. Compared with direct dyes, acid dyes have a simple structure and lack long conjugated double bonds and a co-planar structure. Therefore, they lack directness to cellulose fibers and cannot be used for dyeing cellulose fibers. Different types of acid dyes have different dyeing properties due to different molecular structures, and the...

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2月 17, 2024

Chlorinated polypropylene(CPP)

The research and development of chlorinated polypropylene began in the 1960s. It was first industrially produced by the American Hericules Powder Company. Subsequently, the American Eastman Company, Japan’s Toyo Ink, Asahi Denka and other companies successively built production facilities. From the late 1980s to the present, domestic chlorinated polypropylene production technology has also developed greatly, forming an independent fine chemical products industry. Physical and chemical properties Resin, its finished product is white or slightly yellow. Water-resistant, acid-resistant, alkali-resistant, non-toxic and odorless, high transparency, good film-forming properties, and non-flammable. Density: 0.93 g/mL at 25 °C Chlorine content (%): 32±1 Viscosity (mpa).s: 200-400 Light transmission test: ≤0.06 Fineness (22±1℃): <30μm CPP performance A polar thermoplastic resin with chlorine atoms introduced into the polypropylene molecular chain . A chlori...

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2月 17, 2024

Dye intermediates

Dye intermediates, also known as intermediates, generally refer to various aromatic hydrocarbon derivatives used in the production of dyes and organic pigments. Dye intermediates Also known as intermediates, it generally refers to various aromatic hydrocarbon derivatives used in the production of dyes and organic pigments. They are produced through a series of organic synthesis unit processes (see reaction process) using aromatic hydrocarbons such as benzene, toluene, naphthalene and anthracene from coal chemical industry and petrochemical industry as basic raw materials. With the development of the chemical industry, the application scope of dye intermediates has expanded to the pharmaceutical industry, pesticide industry, explosives industry, information recording materials industry, as well as auxiliaries, surfactants, spices, plastics, synthetic fibers and other production sectors. There are many varieties of dye intermediates, and there are hundreds of...

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2月 17, 2024

fluorescent pigments

Anti-counterfeiting fluorescent pigments appear colorless when illuminated by general visible light. When illuminated by 365/254 nanometer ultraviolet lamps, they appear in red, yellow, green, blue and other luminescent colors . Classification There is currently no recognized method for classifying pigments. The reason is that there are many types of pigments, their chemical compositions vary greatly, and they have many uses. Therefore, any classification method is not ideal. The more common classification method is to divide pigments into inorganic pigments and organic pigments according to their chemical composition . In terms of performance, inorganic pigments have good light and heat resistance and strong hiding power, but the chromatogram is not very complete, the tinting power is low, the color brightness is poor, and some metal salts and oxides are highly toxic. Organic pigments have diverse structures, complete chromatograms, bright and pure colors,...

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2月 17, 2024

Azo pigments are insoluble organic compounds containing azo groups in their molecular structure. They have bright colors and strong tinting power, but their fastness is often poor. However, they are still widely used due to their convenient manufacturing and low price. This type of pigment is generally made of aromatic amines and heterocyclic aromatic amines that are diazotized and then combined with acetylene amine and 2-naphthol to form insoluble precipitates. They can be divided into monoazo and disazo pigments. Yellow azo condensation pigment Pigment Yellow 93 Pigment Yellow 93 is greenish yellow with medium color strength and good thermal stability in polyolefin. High-density polyethylene products prepared with 1% titanium dioxide and 1/3 standard color depth can withstand 270℃/5min. Pigment Yellow 93 has very good light fastness. The brand name of Pigment Yellow 93 is CROMOPETTAL YELLOW 3G from Ciba Chemical Company of Switzerland. Pigment yell...

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2月 17, 2024

Sodium hydroxide(NaOH)

Sodium hydroxide, also known as caustic soda , caustic soda , fire soda , and caustic soda , is an inorganic compound with a chemical formula of NaOH and a relative molecular weight of 39.9970. Sodium hydroxide is highly alkaline and highly corrosive. It can be used as acid neutralizer, masking agent, precipitant, precipitation masking agent, color developer, saponification agent, peeling agent, detergent, etc. It has a wide range of uses. Physical and chemical properties physical properties Density: 2.130 g/cm³ Melting point: 318.4℃(591K) Boiling point: 1390 ℃ (1663 K) Vapor pressure: 24.5mmHg (25°C) Saturated vapor pressure: 0.13 Kpa (739℃) Appearance: white crystalline powder Solubility: Easily soluble in water, ethanol, and glycerin, insoluble in acetone and ether chemical properties Sodium hydroxide has a corrosive effect on fibers, skin, glass, ceramics, etc. It will release heat when dissolved or diluted with concentrated solutions; neu...

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2月 17, 2024

Polypropylene (PP)

Polypropylene, referred to as PP, is a polymer made of propylene through the addition polymerization reaction . It is a white waxy material with a transparent and light appearance . The chemical formula is (C 3 H 6 ) n and the density is 0.89~0.91g/cm 3 , Flammable, melting point is 164~170℃, [17 ]Softens at around 155℃, and the operating temperature range is -30~140℃ . It can resist the corrosion of acids, alkalis, salt liquids and various organic solvents below 80℃, and can decompose under high temperature and oxidation. Polypropylene is a thermoplastic synthetic resin with excellent properties. It is a colorless, translucent thermoplastic lightweight general-purpose plastic with chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high-wear resistance processing properties. , widely used in the production of clothing, blankets and other fiber products, medical equipment, automobiles, bicycles, parts, transportation pipelines, chem...

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2月 17, 2024

Inorganic pigments

Pigments whose main components are inorganic substances. Almost all inorganic pigments are chemical compounds, often complex mixtures, in which metals are part of the molecule. With the recovery of the global economy, domestic and foreign construction and building materials, coatings, plastics, inks and other industries have experienced rapid growth, and the demand for inorganic pigments has also increased rapidly. With the rapid development of the coating industry, inorganic pigments, one of its main raw materials, have made great progress, of which titanium dioxide and iron oxide account for the largest proportion. During the “Twelfth Five-Year Plan” period, Zhiyan Data Research Center stated that the country will implement total control of heavy metals and other characteristic pollutants in some areas. With the increasingly stringent national environmental protection regulations and the growing demand for environmentally friendly inorganic pigments in downs...

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2月 17, 2024

Polyethylene(PE)

Polyethylene (PE for short) is a thermoplastic resin produced by the polymerization reaction of ethylene monomer . In industry, it also includes copolymers of ethylene and a small amount of α-olefins. Polyethylene is odorless, non-toxic, feels like wax, and has excellent low-temperature resistance (the lowest operating temperature can reach -100~-70°C). It has good chemical stability because the polymer molecules are connected through carbon-carbon single bonds and can resist the erosion of most acids and alkalis (not resistant to acids with oxidizing properties). It is insoluble in general solvents at room temperature, has low water absorption and excellent electrical insulation properties. Polyethylene is very sensitive to environmental stresses (chemical and mechanical effects) and can be processed using general thermoplastic molding methods. Polyethylene is widely used, mainly used to make films, packaging materials, containers, pipes, monofilaments, wires and cables,...

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2月 17, 2024

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