China Automobile Industry Wiki-Parts Trade Wiki-Tire Wiki Entries-CNAUTO

organic pigments

Organic pigments are insoluble organic substances that are usually added to a substrate in a highly dispersed state to color the substrate. The fundamental difference from dyes is that dyes are soluble in the dyeing medium used, while pigments are neither soluble in the medium in which they are used nor the substrate being colored. Many pigments and dyes have the same chemical structure. They can be converted into each other by using different methods of use. For example, some vat dyes and sulfur vat dyes can be used as fiber dyes if they are reduced to leuco bodies. ; If not reduced, it can be used as a pigment in high-end inks. Organic pigments are widely used in the pulp coloring of inks, paints, coatings, and synthetic fibers, as well as in the pigment printing of fabrics, the coloring of plastics, rubber, and leather, among which the largest amount of pigments is used in inks. The production of organic pigments accounts for about a quarter of the total dye production. &nbs...

13

2月 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...

17

2月 5, 2024

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 ...

21

2月 5, 2024

Polyethylene terephthalate(PET)

Polyethylene terephthalate (PET), with the chemical formula (C 10 H 8 O 4 ) n , is made by ester exchange of dimethyl terephthalate and ethylene glycol or terephthalic acid and ethylene glycol. Esterification first synthesizes bishydroxyethyl terephthalate, and then carries out polycondensation reaction to obtain it. It is a crystalline saturated polyester . It is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface. It is a common resin in life and can be divided into APET , RPET and PETG . It has excellent physical and mechanical properties in a wide temperature range. The operating temperature can reach 120°C. It has excellent electrical insulation. Even at high temperatures and high frequencies, its electrical properties are still good, but its corona resistance and creep resistance are poor. Denaturation, fatigue resistance, friction resistance and dimensional stability are all very good. Introduction Polyethylene t...

26

2月 5, 2024

High Performance 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,...

26

2月 5, 2024

Calcined kaolin

Calcined kaolin is to sinter kaolin in a calcining furnace to a certain temperature and time, so that its physical and chemical properties will change to meet certain requirements. Introduction Kaolin is an inorganic non-metallic mixture. Compared with uncalcined kaolin, calcined kaolin has reduced bound water content, increased silica and aluminum trioxide content, increased active points, changes in structure, smaller and uniform particle size, and is filled with uncalcined kaolin. Compared with NR rubber, the vulcanization characteristic curves of low-temperature calcined kaolin-filled NR rubber are basically the same. The Sauer type A hardness remains unchanged and the tensile strength increases. The physical properties of both meet the requirements of the industry standard for non-transparent soles of sports shoes. Currently, it is widely used in ceramics, rubber, plastics, artificial leather, self-cement, refractory materials, chemicals and oth...

25

2月 5, 2024

Polyvinyl chloride (PVC）

Polyvinyl chloride, referred to as PVC in English, is the third most produced synthetic polymer plastic in the world (after polyethylene and polypropylene ), with approximately 40 million tons of PVC produced annually. PVC is a polymer formed by polymerizing vinyl chloride monomer (VCM) with initiators such as peroxides and azo compounds or under the action of light and heat according to a free radical polymerization reaction mechanism. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively called vinyl chloride resin . PVC was once the most widely produced general-purpose plastic in the world and was widely used. There are two types of PVC: rigid (sometimes abbreviated as RPVC) and soft. Rigid polyvinyl chloride is used in construction pipes, doors and windows. It is also used to make plastic bottles, packaging, bank or loyalty cards. Adding plasticizers makes PVC softer and more elastic. It can be used in pipes, cable insulation, flooring, signage, phonograph...

41

3月 10, 2024

Baking powder(Suitable for puffed flour products)

Baking powder is a compound additive mainly used in the production of flour products and puffed foods. Baking powder contains a variety of substances, the main components of which are sodium bicarbonate and tartaric acid. Usually a compound of carbonate and solid acid. When carbonates come into contact with water and acids, they break down into a variety of substances. During this process, a high is released, but no flavor is produced. Therefore, the taste of the product is inconvenient. Fermentation There are generally three fermentation methods for making fermented dough: old yeast, fresh yeast, and baking powder. Fresh yeast and baking powder are commonly used in households. Pay careful attention to the aluminum content in baking powder. Aluminum content in food exceeding national standards can cause harm to the human body. Yeast and baking powder both have the function of fermentation, but they are essentially different. Yeast is a pure biologica...

116

2月 5, 2024

Protein powder, using purified soy protein . In healthy people, protein deficiency does not occur. Excessive protein intake is not only a waste, but also harmful to human health. Introduction Protein is the most important nutrient to ensure the health of the body . It is necessary to maintain and repair the body and cell growth . It not only affects the growth of body tissues such as muscles, but also participates in the production of hormones, the maintenance of immune function, and the use of other nutrients and oxygen. Transport, hemoglobin production, blood coagulation and many other aspects. General mental workers require 0.8-1.0 grams of protein per kilogram of body weight every day, while high-intensity athletes and bodybuilders require 2-3 times that amount. This is because high-intensity exercise will damage muscle cells to varying degrees. , causing the decomposition of muscle protein. Timely supplementation of protein can reduce the destruction o...

139

3月 10, 2024

C-Reactive Protein

C-reactive protein (CRP) is a protein (acute protein) that rises sharply in the plasma when the body is infected or tissue damaged. It activates complement and strengthens the phagocytosis of phagocytes to play a regulatory role in clearing the invading body. Pathogenic microorganisms and damaged, necrotic, and apoptotic tissue cells. definition C-reactive protein (CRP) refers to some proteins (acute proteins) that rise sharply in the plasma when the body is infected or tissue damaged. CRP can activate complement and strengthen phagocytosis by phagocytes to play a regulatory role, thereby eliminating pathogenic microorganisms that invade the body and damaged, necrotic, and apoptotic tissue cells , and plays an important protective role in the body’s natural immune process. characteristic CRP is not only a non-specific inflammatory marker, but also directly involved incardiovascular diseases such as inflammation and atherosclerosis , and is the ...

98

2月 5, 2024

PREV 1 … 7 8 9 10 NEXT

Q&A

Popular Information

You May Like

小敏测试112
小敏测试117
Mercedes rear bumpe
E3L3 Pneumatic 20.5/70-16 off The Road Bias OTR Tire for Loaders
JETOUR X90PLUS 2.0T 7DCT
Tyre
Sks2 10-16.5, 12-16.5 Inudstrial Skidsteer Tire for Forklifts Scrapers