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Hot search keywords:Natural Barium Sulfate(Barite),Precipited Barium Sulfate,Titanium Dioxide
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Barite Powder for Coat
Barite ingPowder for Plastic
Barite Powder for Rubber
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Precipitated Barium Sulfate
Rutile type titanium dioxide
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YuanLei little knowledge | Take you to know what is magnesium powder?
Magnesium powder, is the main raw material of ultrafine talc, with a small amount of functional mineral dressing, and through different coupling bridging agent, advanced fatty acids, anionic interface active agent mixed treatment, has a certain strengthening function of powder filler. Magnesium powder in paint, coatings, sun resistance, high temperature resistance, does not change color under ultraviolet irradiation, can maintain the original luster and color for a long time, has good acid and alkali corrosion resistance, and good water resistance, pollution resistance, aging resistance, wear resistance, steam resistance and chemical stability, and strong flame retardant property.
Characteristic
1. fine granularity, hard texture, can provide smooth feel.
2. reduce the luster, with good smooth effect.
3. the specific surface area and oil absorption is large, can absorb a lot of oil and make the thickening effect is remarkable.
4. with hydrophobicity and organic affinity, excellent moisture resistance.
5. good whiteness, strong hiding power, excellent suspension performance and rheology, can reduce the product flow and settlement.
6. with steric hindrance and other effects, can make the formula of titanium dioxide evenly dispersed, so that titanium dioxide increment, to save part of the purpose of titanium dioxide, can replace 25-45% titanium dioxide, so as to reduce the cost of generation. The storage stability of the paint and the properties of the film meet the requirements.
7. it is ultrafine, no grinding, reduce energy consumption.
8. flake microcrystalline structure, so that the film can absorb the pressure caused by expansion or contraction, so that the film is free from cracks and gaps, construction and brushing properties are greatly improved.
9. excellent outdoor durability, wear resistance and can increase the adhesion of the paint film to the substrate.
10. PH value is alkaline, packaging stability and rust resistance is excellent.
Purpose
1. Magnesium powder is used to improve the processing properties of rubber plastic resin, such as die pressing, calendering, extrusion and injection, and the replacable part of the more expensive rubber material 10-15% to reduce the cost of raw materials.
2. Magnesium powder is the Plasticizers used in rubber plastic resins, especially in foaming products. It reduces the friction between the molecules of the polymers and allows the molecular bonds to move easily.
3. Linking of Linear molecules by magnesium powder in polymers from a plane structure to a three-dimensional structure by Crosslinking of magnesium powder enhances the Antiblocking Effect of wear-resisting, toughness and cracking of the rubber mold.
4. the polyolefin in the magnesium powder in very fine (silicon dioxide SiO2. Magnesium oxide MgO) surface mixing treatment, it is helpful to transparency and hardness control, transparent film if add a small amount of (5-10PHR) magnesium powder, can be prepared with excellent surface semi-photoflat system and Antibocking properties.
5. magnesium powder in rubber resin, can change the physical properties of the product - increase tensile strength, balance strength, shear strength, bending strength, hardness, reduce deformation, elongation rate, coefficient of thermal expansion.
6. After mixing magnesium powder with colloidal material, calendered or pulled out 8m/m-10m/m thickness sheet, with smooth and very nice surface, and can quickly reduce bubbles.
7. Magnesium powder is also one of Heat stabisizers. Because it contains advanced fatty acid lipid compounds, it can be used as lubricants for rubber and plastic products, but also react with Hcl precipitated to make Hcl lose its cracking effect.
8. magnesium powder can improve touch, and reduce electrostatic effect.
9. magnesium powder into the rubber material, can make the product easy to print and finish.
10. Magnesium powder has the function of antioxidant. Because it contains aromatic compounds, it can prevent the bond energy in the polymer from breaking under the action of heat, light or oxygen, resulting in the reduction of the strength or brittleness of the adhesive and the loss of its application value.
2023-03-28
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YuanLei little knowledge | How to choose good calcium carbonate
Calcium carbonate (CaCO₃) is an inorganic compound commonly known as greystone, limestone, powder, or marble ₃. Calcium carbonate is neutral, insoluble in water, soluble in hydrochloric acid. It is one of the common substances on the earth. It exists in aragonite, calcite, chalk, limestone, marble, travertine and other rocks. It is also the main component of animal bones or shells. Calcium carbonate is also an important building material and has many industrial uses.
Calcium carbonate has so many uses so how to distinguish between good and bad calcium carbonate, and how to choose a good calcium carbonate? Here's what might help.
We know that calcium carbonate has many excellent properties, compared with other powder materials has obvious advantages, such as low price; Good color, easy to color; Low hardness; Good thermal and chemical stability; Easy to dry, no crystal water; Non-toxic, non-irritating, tasteless, etc.
Therefore, after understanding its characteristics, there are basic requirements for how to select calcium carbonate.
1.calcium carbonate content should be high, silicon, iron and other elements of the compound should be as low as possible；
2. The content of harmful heavy metal elements should be more strict；
Although calcium carbonate has a low content of harmful heavy metals, which meets the requirements of national health level, it should also be strictly required to contain harmful heavy metal elements to avoid causing harm to human body.
3. Whiteness should be as high as possible；
Calcium carbonate itself is more white than other inorganic mineral powder, from the specific value of 90 degrees can be, although the effect of whiteness on the performance of filled plastics is not significant, but the enterprise still hopes that the higher the whiteness, the better, mainly based on these reasons:
(1) The higher the whiteness, the higher the purity, and the lower the content of other mineral components of non-calcium carbonate. Graying of calcium powder indicates the possible presence of free carbon, yellowing indicates the possible presence of more iron compounds, and darkening indicates a high silicon content. High impurity content will sometimes affect the color and appearance of the filled plastic products and cause heavy wear and tear to the processing equipment and mold in the process of processing.
(2) The higher the whiteness, the better the intuitive impression, the higher the grade.
(3) The higher the whiteness, with other pigments, the final color is more positive, more stable and uniform.
4. The lower the oil absorption value, the better；
The maximum amount of butanediol phthalate (DBP) absorbed by 100g powder material is called the oil absorption value of the material.
For some plastic products, such as soft PVC, artificial leather, cable material, need to use plasticizer, calcium carbonate oil absorption value is higher, the more easy to adsorb the plasticizer to the filler, so that it loses the role of plasticizer, so as to achieve a certain degree of softness need to increase the amount of plasticizer, resulting in rising cost. By surface treatment of calcium carbonate and coating of calcium carbonate particles, the oil absorption value can be reduced. For example, light calcium carbonate treated with coupling agent can reduce its oil absorption value from 92.91g/100g to 49.33g/100g.
5, fineness and particle size distribution should be appropriate；
(1) From the perspective of cost, as long as it can meet the requirements of use, prefer to use thick, not fine.
(2) From the performance of filling plastics, under the premise of appropriate increase in cost, the effect of finer granularity will be better.
(3) From the perspective of processing fluidity, on the premise of controlling the maximum particle size, it is better to have a larger average particle size.
6. activation should not be activated according to the needs of downstream users.
2023-03-27
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YuanLei little knowledge | Types and properties of quartz ore
The main component of quartz is SiO2, colorless and transparent, often contains a small amount of impurities, and become translucent or opaque crystals, hard texture. Quartz is a kind of mineral resource with stable physical and chemical properties. The crystal belongs to oxide mineral of tripartite crystal system. Quartz block, also known as silica, is mainly the raw material for the production of quartz sand (also known as silica sand), and also the raw material for quartz refractory and firing ferrosilicon.
Quartz ore resources mainly have these several deposit types, which are natural crystal, quartz sandstone, quartzite, gangue quartz, powder quartz and natural quartz sand.
01 Natural crystal
Natural crystal is a kind of quartz crystal mineral, its main component is silica (chemical formula :SiO₂), natural crystal alias for water blue, water jade, usually block or granular aggregate, generally colorless, gray, milky white, containing other mineral elements purple, red, smoke (tea), yellow, green, etc.
02 Quartz sandstone
More than 90% of the quartz sandstone detrital material is quartz debris, there can be a few feldspar, debris and so on, few heavy minerals, often stable, round heavy minerals, such as tourmaline, wrong stone, rutile and so on. The main component is silicon dioxide, the content is up to 95%-99.5%, mainly used in glass raw materials, silicon refractory materials, metallurgical auxiliary raw materials and minerals and other aspects.
03 quartzite
Quartzite is a metamorphic rock composed mainly of quartz, formed by metamorphism of quartz sandstone and siliceous rocks. Quartzite is generally massive structure, granular metamorphic structure, crystalline aggregate. Quartz is also rich in color, common colors are green, gray, yellow, brown, orange red, white, blue, purple, red and so on.
04 gangue
Gangue is a collection of quartz, milky white, white, grease luster, dense block, specific gravity about 2.65, melting point above 1700℃, good temperature resistance, good acid and alkali resistance, poor thermal conductivity, high insulation, low expansion, chemical stability, hardness greater than 7.
05 Powder quartz
The parent rock of natural quartz ore is a compact quartzite composed of fine quartz with particle diameter of one association. Under the action of epigenetic weathering, the body is crushed and the quartz is fine. The content of silica is 95%-98%, some can be as high as 99%,fe2 content is 0.04%-1%.
2023-03-23
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YuanLei little knowledge | Application of calcined kaolin in architectural coatings
Kaolinite minerals are composed of kaolinite cluster minerals such as kaolinite, crescite, pearlite and helolite, and the main mineral component is kaolinite. The crystal chemical formula of kaolinite is 2SiO2●Al2O3●2H2O, and its theoretical chemical composition is 46.54% SiO2, 39.5% Al2O3 and 13.96% H2O. Kaolin minerals belong to 1:1 phyllosilicates.
Application of calcined kaolin in the field of building materials
1. New cementitious material - soil polycement
Soil polycement is a new cementitious material different from ordinary Portland cement. Soil polycement is made of kaolin by calcination at a lower temperature (500-900℃), and the reaction is as follows:
2n[Si2O5,Al2(OH)4]→ 2(Si2O5,Al2O2)n+ 4nH2O
The reaction transforms the kaolinite structure into amorphous metakaolinite with high pozolanic activity. Amorphous Si - Al compounds such as metakaolin in metastable state undergo a process from depolymerization to repolymerization under the action of alkaline activators and hardening agents, and form aluminosilicate network structure similar to some natural minerals in the crust. Soil polycement has the link structure of organic polymer, but its basic structure is inorganic silico-oxygen tetrahedron and alumino-oxygen tetrahedron, in which the negative charge is balanced by alkali metal and alkaline earth metal cations.
2. Concrete admixture
Metakaolin is the anhydrous aluminum silicate (Al2O3·2SiO2·2H2O) white powder formed by the dehydration of kaolin (Al2O3·2SiO2·2H2O) at the appropriate temperature (500-900℃). The average particle size is 1-2 μm, the content of SiO2 and Al2O3 is more than 90%, especially the high content of Al2O3. The atomic arrangement of metakaolin is irregular, showing thermodynamic metastable state, which has strong pozzolanic activity. Metakaolin is easy to react with cement hydration products CH and water to produce hydration products, mainly CSH gel, calcium aluminate hydrate and calcium sulfoaluminate hydrate, etc., so it is widely used in concrete admixture to replace wollastonite.
3. paint coating
The main mineral raw materials used in the paint industry are calcium carbonate, talc, titanium dioxide and calcined kaolin. Because kaolin is chemically inert, strong covering ability, low cost, high whiteness and excellent performance, calcined kaolin is used as filler and color substitute in paint, which can not only control the demand for expensive fuel, but also reduce the production cost. For calcined kaolin, in addition to the above advantages, there are many characteristics: irregular shape, strong optical properties, high volume concentration and oil absorption of the pigment itself, wear-resistant, not easy to aging, and high hiding power.
Its main use in the paint industry is to replace white pigments, especially titanium dioxide; In addition, the particles and types are corresponding to each other, different types of paint with different particles and types of kaolin. For example, dim or smooth paint to use coarse particles of calcined kaolin; The brighter paint requires calcined kaolin with finer particles, and using the opaque and anti-corrosion characteristics of fine kaolin, it can also make latex-like materials.
2023-03-17
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