Heavy calcium carbonate is a kind of powder material, which is made from calcite, marble, limestone, chalk, White Marble and other natural minerals by mechanical grinding. It is an important industrial filler, pigment and chemical product. A comprehensive understanding of the application fields and requirements of calcium carbonate is helpful for enterprises to do a good job in product planning and technology development. Below, we will share with you the 9 major application areas of heavy calcium carbonate!
1. Paper making
For the paper industry, heavy calcium carbonate is an important raw material second only to fiber. As a filler and coating pigment, heavy calcium carbonate mainly improves the performance of paper in the following aspects:
(1) Improve opacity and brightness
(2) Improve smoothness, uniformity, and softness
(3) Reduce moisture absorption and deformation degree
(4) Enhance ink absorption and printability
(5) Reduce paper costs
Practice has shown that the lower the wear value of heavy calcium carbonate, the more beneficial it is for protecting and extending the lifespan of components such as filter screens and blade heads in paper machines. Therefore, developed countries such as Europe generally choose high-quality chalk soil with high purity and good whiteness as the preferred raw material for heavy calcium carbonate used in papermaking. When using marble and calcite as raw materials for heavy calcium carbonate used in papermaking, the purer the ore and the higher the content of calcium carbonate, the more beneficial it is for papermaking.
2. Plastic
The plastic industry is the largest consumer area of calcium carbonate in China. Calcium carbonate is widely used to fill polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), acrylonitrile butadiene styrene copolymer (ABS), etc. Its main functions are:
(1) Improve the stability of plastic product dimensions
(2) Improve the hardness and rigidity of plastic products
(3) Improve plastic processing performance
(4) Improve the heat resistance of plastic products
(5) Improve the astigmatism of plastics
(6) Endow functionality such as insulation, flame retardancy, etc
(7) Reduce the cost of plastic products
3. Paint
Calcium carbonate is the most widely used constitutional pigment in coatings, which plays a role in filling the skeleton and substrate in the paint film, while improving the performance of the coating.
(1) 70-80% of the putty powder is composed of heavy calcium
(2) In thick paint, the amount of calcium carbonate is generally above 30%; In water-based coatings, the amount of calcium carbonate used is 20-60%
(3) Calcium carbonate is an ideal matting filler in topcoats, such as matte white cheese wall paint containing 11.5% heavy calcium carbonate
(4) Calcium carbonate has a certain anti rust effect in metal anti rust coatings, and the appropriate dosage is about 30%
(5) Indoor decorative paints, such as polyvinyl acetate emulsion paint, typically contain about 10% calcium carbonate
For example, ultrafine heavy calcium carbonate powder materials have significant effects on shortening the dispersion sanding time, improving covering power, improving latex viscosity, reducing the amount of titanium dioxide used, and improving the polishing performance of putty in the production process of latex paint.
When designing coating formulations, high-performance latex paint uses ultrafine calcium carbonate, while low-end latex paint selects relatively coarse particle size and low oil absorption value heavy calcium.
At present, heavy calcium carbonate powder has a good application effect in interior latex paint, with particle size control of d97<10 d50='' of='' about='' 1.5='' and='' whiteness=''>95% CaCO3≥98%。
4. Rubber
Heavy calcium carbonate is mainly used as a filler in the rubber industry, and can also be combined with other reinforcing agents to improve the processing performance of rubber materials and product performance. It is suitable for heels, soles, floors, rubber hoses, as well as molded, extruded, and foamed rubber products.
(1) Incremental and capacity increasing effects
(2) Improve the stiffness of the rubber material
(3) Improve electrical insulation
(4) Reduce the shrinkage rate of rubber material during extrusion
(5) Reduce production costs of products
(6) It can also be used as a release agent, mold release agent, or white pigment
5. Breathable membrane
Breathable film is a blend of special calcium carbonate with about 50% added to PE or PP carrier, extruded to form a film, and then oriented and stretched to a certain ratio. It is widely used in the packaging of medical and health products (such as medicinal adhesive film, surgical gowns, medical gloves, women's sanitary napkins, baby diapers, disposable bed sheets and other clinical medical consumables), food packaging (such as cling film, composite film, cooked food packaging bags), and daily products (such as thermal clothing interlayers, disposable lightweight raincoats).
There are two key factors in the production of breathable membranes: calcium carbonate and stretching. The performance indicators of calcium carbonate directly affect the processability (such as coking time, extrusion stability, manufacturability of thin film materials, and pinhole defects) and physical properties (such as air permeability, water pressure resistance, thermal stability, and mechanical properties) of breathable membranes.
6. Food
In the food industry, heavy calcium carbonate can be used as an alkaline agent, nutritional supplement, dough conditioner, curing agent, yeast nutrient, anti caking agent, loosening agent, gum sugar additive, and modifier. It can also be added to calcium fortified health foods, gum sugar, leavening agent, flour products, breakfast cereals, biscuits, dairy products, soft capsules and other products. It is even an ideal reaction raw material for high-purity pharmaceutical grade organic calcium salts such as calcium citrate, calcium lactate, calcium citrate malate, and calcium gluconate.
In terms of calcite raw materials, the raw ore used for producing food grade calcium carbonate must be high-quality and high content pure natural ore. There must be no pollution or impurities during the processing, and the packaging process must also be clean and pollution-free.
7. Toothpaste
In the toothpaste industry, calcium carbonate is a commonly used friction agent, which is cheap and easy to obtain (using limestone or calcite as raw materials), and is widely used in mid to low grade toothpaste.
The shape, size, hardness, and content of abrasives in toothpaste are the main factors determining the friction of toothpaste. The abrasive particles should have appropriate hardness, uniform fineness, low solubility, chemical stability, white appearance, no odor, comfortable taste, and completely non-toxic.
8. Feed
Heavy calcium carbonate is a feed type mineral material used as a calcium source to supplement calcium. The general addition amount for feed is 0.5-1%. Poultry such as chickens, ducks, and geese that lay eggs need to add an appropriate amount of calcium carbonate to their feed. During the peak egg laying period, calcium carbonate can be added up to 8-9%.
For heavy calcium carbonate used in feed, particle size is an important quality indicator. For example, heavy calcium carbonate used by laying hens should not be crushed too finely, as small particles of calcium have a short residence time in the muscle and stomach, low utilization rate, and lead to a decrease in eggshell quality. Research has shown that when heavy calcium carbonate is mixed in large and small particle sizes (i.e. 75% 6-8 mesh, 12.5% 10-12 mesh, and 12.5% 50 mesh), the egg breakage rate is the lowest and the eggshell strength is the highest. This is because the mixed use of large and small particle sizes can evenly supply calcium, ensuring the quality of the eggshell. At the same time, large particles have a sand like grinding effect in the stomach, which can promote the digestion of feed.
9. Artificial stone
Heavy calcium carbonate powder is the main filler for resin based artificial stone, generally accounting for more than 75% of the quality of artificial stone. Moreover, the larger the filling amount, the less resin is used, the lower the production cost, and the more environmentally friendly it is.
Therefore, the lowest possible oil absorption value is one of the main technical requirements for artificial stone for heavy calcium carbonate, which often requires surface modification and other means to achieve. In addition, the higher the whiteness, the better it is for white products.
At present, the whiteness of artificial stone specific heavy calcium carbonate in the market has reached over 95, with particle sizes ranging from 20 mesh to 1250 mesh in various specifications.
In addition, heavy calcium carbonate can also be applied in various fields such as pharmaceuticals (pH buffering agents for microbial fermentation, calcium supplements, antacids), construction (dry mixed mortar, concrete), fertilizers (acid washed soil amendments), glass (melting point reduction), and flue gas desulfurization.
Choosing Guangxi Huaxiang New Materials Co., Ltd. is the right choice for calcium carbonate manufacturers who are afraid of pitfalls and high prices!
Reasons for choosing us
1. Source material self-sufficiency: Enterprises support their own mines to achieve self-sufficient supply of raw materials, eliminating the hidden dangers of price differences and quality fluctuations in purchased raw materials. They accurately control production costs and stabilize product physical and chemical indicators from the mining source end.
2. Hardcore production capacity: Covering an area of 80 acres, the modern production plant has more than 20 fully automated and intelligent production lines, mass producing over 100 product categories. Adequate inventory and large-scale production capacity ensure long-term stable delivery, and are not afraid of large-scale order demands.
3. Deep cultivation and accumulation throughout the entire chain: For more than ten years, we have focused on the development of calcium carbonate and hot melt marking coating filling masterbatch fields, deeply cultivated the layout of upstream and downstream industrial chains, and have the ability to provide full chain supporting research and development, production, and landing services.
4. Full compliance qualifications: Obtaining ISO system certification, SGS product testing certification, establishing a standardized quality inspection system, conducting layer by layer inspections of raw material storage and finished product delivery, and ensuring reliable product quality.
5. Flexible customized OEM: Based on mature production processes, product formulas, particle sizes, and specifications can be customized according to customer usage scenarios. In addition to raw material supply, downstream finished product processing and supporting supply can also be undertaken.
6. Professional selection empowerment: Equipped with a senior technical service team, based on industry application scenarios, scientifically recommend suitable products according to customer actual needs, and provide professional pre-sales selection and after-sales technical services throughout the entire cycle.
