1. Introduction
In paper-making industry, the selection of raw material plays an important role in the quality, performance and production cost of paper. Among many additives, kaolin has become one of the indispensable raw material due to its unique physical and chemical properties. Kaolin can help improve paper quality, optimize production process, and promote sustainable development of paper-making industry.
So, what are the specific functions of kaolin in paper-making industry? First, let’s take a look at its basic properties:
2. Basic properties of kaolin
Kaolin is a non-metallic mineral. It is a kind of clay mainly composed of kaolinite clay mineral. Due to its white and delicate appearance, kaolin is also called dolomite. It has excellent properties of plasticity and fire resistance. Kaolin has a wide range of application, mainly used in paper-making, ceramics and refractory material, and secondly used in coatings, rubber, enamel glaze and white cement.
3. The main functions of kaolin in paper-making
① Improve whiteness and glossiness of paper
The high whiteness of kaolin can effectively improve the whiteness of paper, making it brighter and purer. At the same time, its fine particles can form a uniform layer on the surface of paper, increasing the glossiness of the paper and improving printing effect.
② Enhance strength and durability of paper
During paper-making, particles of kaolin are able to fill the gaps between fibers, forming tighter structures, this is helpful to improve tensile strength, tear strength and folding resistance of paper. This is particularly important for producing high-quality writing paper and printing paper.
③ Improve printing adaptability of paper
The excellent oil absorption and dispersibility of kaolin make the ink adhere more evenly to the paper surface, this can somewhat avoid the problem of print-through during printing and improve the clarity and color saturation of printed products.
④ Adjust ink absorption and air permeability of paper
By adjusting the amount of kaolin added, ink absorption speed and air permeability of the paper can be precisely controlled, this can meet the needs of different types of printed material, eg: it can satisfy fast ink absorption of newsprint and slow ink absorption of coated paper.
⑤ Reduce production cost
Using kaolin as filler can reduce the use of expensive wood pulp, this can reduce production costs to some extent.
4. Application prospect
With the continuous growth of market demand, the application of kaolin in paper-making industry will continue to increase. In addition, with the continuous innovation of processing technology, such as ultra-fine grinding and surface modification, kaolin can obtain new properties and functions, which is helpful to expand application field and scope of kaolin.
The ball mill and surface coating modifier produced by Qingdao Epic Powder Machinery Co., Ltd. are suitable for grinding and modifying of kaolin respectively.
Qingdao Epic Powder Machinery Co., Ltd. is a manufacturer specializing in the production of powder processing equipment.
Its products include:
– Mill: ball mill, pabrik rol, jet mill, air classifier mill, vibration mill and impact mill etc.
– Penggolong: four series of air classifiers: HTS, ITC, MBS and CTC.
– Modifier: pin-mill modifier, turbo-mill modifier and three-roller-mill modifier etc.
– Auxiliary equipment: control cabinet, dust collector and bucket elevator etc.
– Customers can also customize equipment according to their needs, one customer one design.
If you have relevant needs or questions, please contact staff from Qingdao Epic directly, they are always at your service.
Below are photos of ball mill and surface coating modifier from Qingdao Epic for your reference.
