Calcined Kaolin Used for Paper Making Industry

Compared with uncalcined kaolin, the bound water content of low-temperature calcined kaolin decreases, the content of silica and trialumina increases, the active point increases, the structure changes, the particle size is smaller and uniform, and the vulcanization characteristic curve of low-temperature calcined kaolin filled NR rubber is basically the same as that of uncalcined kaolin filled NR rubber, the Shore hardness is unchanged, and the tensile strength is improved.

SiO2:	52±2%
Al2O3:	45±2%
Fe2O3:	≤0.8%
TiO2:	≤1.3
K2O:	≤0.1%
Na2O:	≤0.2%
CaO:	≤0.5%
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Model:
Paper Making
Code:
25070010

Product Description

CALCINED KAOLIN

INTRODUCTION

Calcined kaolin is the sintering of kaolin in the calcining furnace to a certain temperature and time, so that its physical and chemical properties have a certain change to meet certain requirements.

Compared with uncalcined kaolin, the bound water content of low-temperature calcined kaolin decreases, the content of silica and trialumina increases, the active point increases, the structure changes, the particle size is smaller and uniform, and the vulcanization characteristic curve of low-temperature calcined kaolin filled NR rubber is basically the same as that of uncalcined kaolin filled NR rubber, the Shore hardness is unchanged, and the tensile strength is improved.

PRODUCT PICTURES

_0141_IMG_2254

Products indicators

Typical Physical Properties
NO.	Item	DG80	DG90	DG90L	DG90R	DG93R
1	Brightness (%)	93	93	90	93	88
2	Particle Size (-2um, %)	80±2	88±2	85±2	88±2	88±2
3	Screen Residue,325 Mesh (%)	0.01	0.01	0.01	0.01	0.01
4	Oil Absorbency (g/100g)	60±5	65±5	70±5	70±5	80±5
5	Dispersibility (um)	55	55	45	55	45
6	Abrasion Value (mg/100000 times)	/	/	22	30	20
7	Moisture (%)	0.5	0.5	0.5	0.5	0.5
8	pH	6.0-8.0	6.0-8.0	6.0-8.0	6.0-8.0	6.0-8.0
9	Specific Gravity (g/cm3)	2.7	2.7	2.7	2.7	2.7

Chemical Components
NO.	Item	Result(%)
1	SiO2	52±2
2	Al2O3	45±2
3	Fe2O3	≤0.8
4	TiO2	≤1.3
5	K2O	≤0.1
6	Na2O	≤0.2
7	CaO	≤0.5
8	MgO	≤0.2

APPLICATION

As a paper filler (Fillers)

Fillers are substances added to the pulp to fill the gaps between fibers. Their main functions are to reduce costs and improve the physical properties of the paper. The advantages and applications of calcined kaolin as a filler are as follows:

1. Enhance paper whiteness and opacity

The whiteness of calcined kaolin can reach over 90% (much higher than that of uncalcined kaolin), and the particles are fine (usually 200-1000 mesh), which can be evenly dispersed between fibers, reflecting light and blocking the text or patterns on the back of the paper page. It is particularly suitable for cultural papers (such as newsprint, writing paper) and packaging papers, reducing the problem of paper transparency.

2. Improve paper smoothness and printing suitability

Its particles are in the form of flakes or pseudo-hexagonal sheet-like structures. After filling the gaps between fibers, it can make the surface of the paper page smoother, reduce ink consumption during printing, enhance the clarity of graphics and text, and is suitable for coated paper bases with high printing quality requirements.

3. Reduce production costs

Compared to other fillers (such as titanium dioxide), calcined kaolin has a lower price and can be added at a rate of 10% to 30% of the paper weight. This not only ensures the performance of the paper but also reduces the usage of fiber raw materials (such as wood pulp), thereby lowering production costs.

4. Optimize the physical properties of paper

Appropriate addition can enhance the density and stiffness of the paper, reduce its moisture absorption, and extend the storage time of the paper. This is suitable for archival paper, book paper, and other types of paper that need to be preserved for a long time.

COMPANY PROFILE

Amanda (Liaoning) International Trade Co., Ltd. was formerly known as Jin Run Hao Mineral Products Co. The company was established in early 2018, is an integrated company engaged in mineral products processing, foreign trade sales. The main products of the company are ceramic materials, construction materials and refractory materials. The company adopts international advanced processing and photoelectric integration classification technology equipment, in order to ensure accurate quality control and meet the needs of customers. Our company has a technical R&D team to adjust the quality requirements for the special needs of different customers. In the complex international intermodal transportation, we have signed first-class agency contracts with many shipping companies and railroad companies in many ports to provide customers with low-cost and time-efficient transportation solutions. Each product of our "AMANDA" brand has its own advantages and is suitable for different industries. Our products are exported to India, Russia, Turkey, Vietnam, Korea, Indonesia, Bangladesh and other Southeast Asian and European countries. Our products are well received by our customers and we have established a long-term cooperation partnership.

Facing the fierce market competition, Amanda people insist on the tenet of market-oriented, customer-oriented and credit-oriented, and strive to become an international enterprise with outstanding quality, trustworthiness and social responsibility.