The application opportunity of the hottest nanotec

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The application opportunity of nanotechnology in traditional and digital printing

the development and evolution of printing technology, its content is from symbols through text to black and white to color; Manuscript from analogy to digital; Production mode from manual to mechanical and then to computer automation; The printing ink has been from water-based and oil-based to the current nano level printing ink. At the time of the global development of digital ink-jet printing, its core technology not only focuses on how to develop high-speed, large number and low-cost machines, but also focuses on the research and development of ink-jet and laser consumables. Especially, the current major nano pigments or functional pigments can best meet the requirements of wide color gamut, water resistance, weather resistance, low cost, high value and applicable to a variety of substrates. At present, the application opportunity of nano pigments lies in the development space of traditional ink printing and ink-jet printing. What is the ideal pigment characteristic:

1 Fresh

2 Good penetrability

3 High color intensity

4 Lightfastness

5 Water resistance

6 Durability

generally speaking, do dyes have bright colors? The advantages of nature and good penetrability, and the problems of poor water, light and weather resistance. It is usually suitable for textiles, wood and indoor printing; While traditional pigments have the advantages of water resistance, light resistance and weather resistance, are their colors not fresh enough? Saturation and poor color intensity. Suitable for printing, coating and outdoor printing. The main difference between Nano pigments developed in the laboratory at present is the size of particles. The average particle size of traditional pigments ranges from 100 to several microns (UM), while nano pigments are defined as less than 100 nm. Nowadays, the appearance of nano products is mostly darker than the primary color. The reason is that the particles become smaller and the body surface area becomes larger. When the light penetrates the pigment, it will continue to scatter when encountering small particles, and less light will be transmitted, resulting in the decline of reflectivity and the change of optical properties, so it will look a little dark black. The viscosity has also changed from hundreds to tens of thousands of high viscosity to low viscosity (about less than 20 CPS)

II. Industry entry point:

1 Development of digital inkjet machines and inkheads: at present, there is a large demand for low-cost digital inkjet machines and their consumables in the market, mainly water-based pigments and dyes; As it may involve the development patents of other companies, it can be carried out in two aspects: quick drying or hardening machine and ink head

2. Preparation of pigment dispersion masterbatch: at present, it is the technical cooperation of Japan or other countries to develop their own technology, which can connect the upstream and downstream industries without being limited by others

3. Traditional ink printing formula technology: when the pigment reaches nano particles, the particles are easy to gather, so the particle stabilization technology is the primary condition

4. Digital inkjet formulation technology: the application of various water-based inkjet inks (table, wide and industrial), UV hardened inkjet

its main niche depends on the following four points:

1 Replace imported products

2 Establish new product technology

3 Reduce costs

4 Diffusion application technology

III. application of nano pigments in inkjet printing:

1 Digital ink-jet or traditional color filter

2 Desktop/industrial/commercial/wide format/photo inkjet printer

3 UV hardening ink jet ink to large Kanban/Poster

IV. what is nano

nano is a description of the scale of matter, and the length of 1 nanometer (nm) is meters. At the nanoscale, generally between 1nm and 100 nm, the properties of matter do not belong to the macroscopic horizon of classical physics, nor to the microscopic behavior of quantum physics, but present the so-called mesoscopic phenomenon. Nano materials refer to nano particles, fibers, granular films, multilayers or nano phase materials composed of atomic clusters (including grains or phases) with at least one-dimensional size between 1, which are not productive equipment nm~100nm, so they include nano particles, fibers, granular films, or nano phase materials composed of atomic clusters. (1nm = m) 。 The dimensions of nanoscience are:

meters -- 100 m

millimeters -- m

microns -- m

nanoparticles -- m

v. difficulties and technical bottlenecks in the nanolization of pigments:

today's pigments are generally aggregated large particles from several microns to submicron units. Now, in order to reach the particle size of nano scale (30 nm), its specific surface area has changed from 1 unit to 100 units, and the van der Waals force will be greater than 100, At this time, its most important problem lies in the grinding dispersion technology and the inkjet formula and the lightweight material technology provided by colloidal dispersion and stabilization technology Jinmin

1. Grinding and dispersion technology: in the process of pigment micronization, the grinding method is mainly wet grinding and dispersion, and the method is to impact and grind with high-energy dispersant and high collision frequency (20~30m/s). Here, grinding machine and grinding material are the two main parts

a. grinder:

(a) Traditional grinders: there are two kinds of vertical grinders and horizontal grinders that can replace lead-acid batteries and lithium batteries. At present, the horizontal ball mill is generally used. Its disadvantages are complex system design, difficult maintenance, high price and large grinding medium (0.25mm). The vertical ball mill is rarely used because the grinding ball is heavy and concentrated at the bottom of the machine, resulting in uneven grinding

(b). Nano scale dispersion equipment: in order to improve the current equipment, the Institute of chemical industry has developed a new grinding medium separation system. It is a material manufacturing equipment with wear resistance and high heat transfer effect. It can use ultra-fine medium (100 UM) to grind and improve blade speed (15~30m/s)

b. grinding medium: at present, most grinding materials are yttrium or zirconium, the traditional grinding material is 0.30~1.0mm, and the really good medium is less than 0.1mm (ultra-fine medium). It can increase the collision point between particles and the effective shear force surface

2. Ink jet formula and colloidal dispersion and stabilization technology: in order not to make the cohesion between particles affect its stability too much, the indicated value can be treated with dispersant or interfacial activator when it is within 5 ‰ of the actual value. The principle is to add dispersants or interfacial active agents to make the surface of particles charged. Based on the same-sex repulsion principle, particles will not attract and aggregate each other, so as to achieve stability

VI. application/market of nano pigments:

application content characteristics related industry market value (100 million yuan)

ink color quality color gamut 20 (2~3%)

paint color quality color gamut 30

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