Application of the hottest micro powder wax in pri

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The application of micro powder wax in printing ink (Part 1)

Abstract This paper analyzes the market, production technology and product technical indicators of domestic and foreign manufacturers of micro powder wax. It also provides useful solutions to some problems in application

key words: micro powder wax printing ink

I. market overview of micro powder wax

ultra fine powder technology is a high-tech developed in recent years. Generally, the particle size is less than 0.5 μ Particles of M are called ultrafine particles, 20 μ Particles below m are called microparticles, and the aggregate of ultra-fine particles is called ultra-fine powder. Micronized wax is widely used in printing ink, paint and coating due to its excellent performance, which is easy to wear. It can improve the scratch resistance, wear resistance, smoothness, adhesion resistance, non fit and hand feel of its surface; Improving the anti adhesion and anti fouling performance can control the gloss of printing ink, prevent pigment sedimentation, and cooperate with matte powder to produce high-performance matte ink and paint, which has become an indispensable and important auxiliary in the production of paint and ink

micro powder wax is ultra-fine powder, with particle size ranging from 2 to 30 μ m. The molecular weight distribution is wide, ranging from 600 to 6000, which is widely used. Most micro powdered waxes are made from polyethylene wax, Fischer Tropsch wax, polypropylene wax, polytetrafluoroethylene, and its modified wax through various micro powdering processes. Another part is amide wax, microcrystalline wax and natural wax produced by micronization process

(1) polyethylene wax: it is made by direct polymerization of ethylene monomer or cracking of polyethylene. Its molecular weight is about

and its melting point is 100-120 ℃. It has excellent friction resistance, scratch resistance, adhesion resistance and light retention, and has a wide range of applications. There are many branched chain structures and good wear resistance. The properties of high density and low density polyethylene micro powder wax are different

(2) Fischer Tropsch wax: it is a linear wax without branched chain, which is polymerized from coal gas by Fischer Tropsch process, and its molecular weight is about 500 ~ 1000. Low melting point, excellent smoothness and improved hand feel. The wax has good smoothness, strong hand feel and easy dispersion

(3) polypropylene wax: compared with polyethylene wax, it has higher softening point and hardness, outstanding adhesion resistance and wear resistance, and has a good effect of improving metal scratch resistance. It can prevent and reduce machine failure and prevent the sedimentation of pigments and silica in inks and coatings, but its compatibility is slightly poor and it is difficult to disperse

(4) polytetrafluoroethylene wax: higher softening point, higher density, excellent heat resistance, outstanding smoothness, wear resistance, scratch resistance and viscosity resistance. Hydrophobic and antifouling, excellent comprehensive performance, difficult to disperse, high price

(5) modified micro powder wax: modify polyethylene wax or synthetic wax with polytetrafluoroethylene, improve the softening point and hardness of polyethylene wax, increase smoothness, wear resistance, scratch resistance and adhesion resistance, and improve the disadvantages of polytetrafluoroethylene wax, such as difficult dispersion and high price

there are three main ways to prepare superfine powder wax from polymer wax: first, starting from coarse particles, using physical methods such as mechanical crushing, evaporation and precipitation and melting spray; The second is to use the role of chemical reagents to make the molecules in various dispersed states gradually grow into particles with the required particle size, which can be divided into the broader and deeper connotation of the production line, including management, system and corporate culture, and implement two dispersion methods of innovative high dissolution and emulsification at home and abroad; Third, directly adjust the preparation of polymerization or degradation. Such as PMMA micro powder, controllable molecular weight PP, PS micro powder wax prepared by dispersion polymerization, PTFE micro powder prepared by thermal cracking and radiation cracking. In China, manufacturers mainly use physical methods to prepare various micro powdered waxes

domestic research and production of micro powder wax started late, but the demand is increasing year by year. The large-scale production includes the fine chemical plant of Beijing University of chemical technology, the Institute of materials of Qiqihar University, etc. Polyethylene micro powder wax is widely used in foreign countries, and the demand is large. Japan alone produces about 3000 tons per year, and the price is about twice that of ordinary resin. At present, due to the low output of micro powder wax in China, it can only meet some market needs. Another part of the market demand mainly depends on the import of polyethylene micro powder wax products from Germany and the United States, such as Lianxin and Sanye from the United States, Degussa, Hester, BASF and Klein from Germany, Sanyo Chemical Co., Ltd. from Japan, petrochemicals from Japan, Mitsubishi Chemical Industry from Japan and Deqian from Taiwan. However, the general price of polyethylene micro powder wax in the market is relatively high, and the price is generally about 23000 ~ 35000 yuan/ton

II. Technical indicators of various manufacturers

although there are many production methods of wax, micronized wax is still the most, and there are many kinds of micronized wax on the market, and the production processes of various manufacturers are also different, which makes the particle size distribution, relative molecular weight, density, melting point, hardness and other properties of micronized wax in various factories somewhat different

1. The technical indicators of polyethylene micro powder wax in the fine chemical plant of Beijing University of chemical technology are as follows:

2. The technical indicators of polyethylene micro powder wax in the Institute of materials of Qiqihar University are as follows:

3. The technical indicators of German Clariant company

4. The technical indicators of Sanye company

5. The main technical indicators of Degussa company are as follows

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