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Vae lotion
VAE (VAE) emulsion , the abbreviation of vinyl acetate- ethylene copolymer emulsion, is a polymer emulsion copolymerized by high-pressure emulsion polymerization using vinyl acetate and ethylene monomer as basic raw materials, adding emulsifiers and initiators .     Introduction   Ethylene and vinyl acetate copolymer is the most important product among ethylene copolymers. It is generally referred to as EVA abroad . However, in China, people divide ethylene and vinyl acetate copolymers into EVA resin , EVA rubber and VAE emulsion based on the different vinyl acetate content. Products with a vinyl acetate content of less than 40% are EVA resins; products with a vinyl acetate content of 40% to 70% are very flexible and elastic. EVA resins with this content range are sometimes called EVA rubber; products with a vinyl acetate content of 70% The range of ~95% is usually in an emulsion state and is called VAE emulsion. VAE emulsion appears milky white or slightly yellow. Fore...
cnauto
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February 18, 2024
offset printing ink
Offset printing is currently the most important printing method. It is characterized by the need to use fountain solution during the printing process. Therefore, offset printing ink requires good water resistance. In the past, the binding materials for offset printing inks were mainly vegetable oils such as linseed oil, but now most of them have been replaced by various resins with better performance. Common resins include rosin-modified phenolic resin, alkyd resin, and polyurethane alkyd resin.     Main categories   Offset printing inks are classified in different ways.   Classification according to substrate   According to the chemical name of the substrate, it can be divided into: polyethylene, polypropylene (non-polar) ink. PVC, polystyrene, ABS polycarbonate (polar) ink. According to the form of the substrate, it can be divided into soft plastic ink and hard plastic ink.   Classification according to printing machinery   According to the classif...
cnauto
100
February 18, 2024
Ilmenite
Ilmenite is an oxide mineral of iron and titanium, also known as titanium magnetite . It is the main ore for refining titanium. Ilmenite is heavy, gray to black, with a bit of a metallic sheen . The crystals are generally plate-shaped, and the crystals are grouped together into blocks or granules. The composition is FeTiO 3 . TiO 2 content is 52.66%, which is the main mineral for extracting titanium and titanium dioxide . Trigonal crystal system. In the Panzhihua iron ore in Sichuan, China, ilmenite is distributed between magnetite particles or in cracks , forming large deposits. The chemical composition of ilmenite is related to the conditions of formation. Ilmenite produced in ultrabasic rocks and basic rocks has a high MgO content and basically does not contain Nb and Ta; ilmenite produced in alkaline rocks has a high MnO content and contains Nb and Ta; Ilmenite in acidic rocks has high FeO and MnO contents, and relatively high Nb and Ta contents.   type   Ilmenite is oft...
cnauto
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February 18, 2024
Rutile
Rutile is relatively pure titanium dioxide , generally containing more than 95% titanium dioxide. It is an important mineral raw material for refining titanium , but its reserves are small in the earth’s crust. It has excellent properties such as high temperature resistance, low temperature resistance, corrosion resistance, high strength, and small specific gravity. It is widely used in military aviation, aerospace, navigation, machinery, chemical industry, seawater desalination, etc. Rutile itself is one of the necessary raw materials for high-end welding rods and the best raw material for producing rutile titanium dioxide . Titanium dioxide in rutile is widely used in photocatalyst materials. It is made by adding lanthanide rare earth elements , nano-zinc oxide absorbing materials , diatomite , silicon-carbon chain nanopolymers and other pure natural minerals through scientific preparation and special processing technology. , the pore diameter of its internal pores is between 0...
cnauto
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February 18, 2024
direct dyes
Direct dyes are dyes that can be heated and boiled in a neutral or weak bond phase medium without the help of a mordant. Direct dyes are formed by combining hydrogen bonds and van der Waals forces between direct dyes and cotton fibers. It is mainly used in fiber, silk, cotton spinning, leather and other industries, and is also used in paper making and other industries. Direct dyes can be divided into azo, stilbene and other types according to their structure. According to their application classification, they mainly include ordinary direct dyes, direct lightfast dyes and direct azo dyes.     Dye principle   Direct dyes have water-soluble groups such as sulfonic acid groups (-SO3H) or carboxyl groups (-COOH) and their molecular structures are arranged in a linear shape. The aromatic ring structures are in the same plane,Therefore, direct dyes have a greater affinity for cellulose fibers and can be dyed directly in a neutral medium by simply dissolving the dye in dry wat...
cnauto
234
February 17, 2024
Acid Dyestuff
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...
cnauto
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February 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...
cnauto
221
February 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...
cnauto
120
February 17, 2024
heavy calcium carbonate
Heavy calcium carbonate, referred to as heavy calcium, is made from ground natural carbonate minerals such as calcite, marble, and limestone. It is a commonly used powdery inorganic filler with high chemical purity, high inertness, not easy to react chemically, good thermal stability, will not decompose below 400°C, high whiteness, low oil absorption, low refractive index, soft, dry, It does not contain crystal water, has low hardness and low wear value, is non-toxic, tasteless, odorless, and has good dispersibility.     Physical and chemical properties   The chemical formula of calcium carbonate is CaCO3. Its crystals mainly include trihedral calcite and orthorhombic aragonite. At normal temperatures and pressures, calcite is stable and aragonite is quasi-stable. Currently, calcite is the main form. Lord.   Under normal pressure, when calcite is heated to 898°C and aragonite is heated to 825°C, it will decompose into calcium oxide and carbon dioxide; calcium carbo...
cnauto
112
February 5, 2024
Reactive Dyes
Reactive dyes are also known asReactive dyesIt is a new class of water-soluble dyes that appeared in the 50s of the 20th century, and the reactive dye molecule contains hydroxyl groups that can be combined with celluloseProtein fiberThe active group that reacts with the amino group in the middle of the amino group forms a covalent bond with the fiber when dyed, forming a “dye-fiber” compound. Reactive dyes have the characteristics of bright color, good uniformity, simple dyeing method, high dyeing fastness, complete chromatography and low cost, and are mainly used in dyeing and printing of cotton, linen, viscose, silk, wool and other fibers and their blended fabrics.     definition   Reactive dyes are also called reactive dyes. The molecule contains chemically reactive onesGroup, can beaqueous solutionIt is a dye that reacts with cotton, wool and other fibers to form a common bond. It has a high washing resistanceFastness   classify   According to ...
cnauto
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February 5, 2024
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