In the packaging and printing industry, there are many models and different types of packaging containers with corresponding ink, but all ink structures are waterborne emulsion. The use of all-in-one machine is based on fast and low cost. The ink used has the characteristics of cheap, environmental protection, stability and drying.Introduction To Ink Related Components Of All-In-One Machine
The basic composition of integrated ink is the same as that of other inks, but the ink is composed of oil phase and water phase, which has the characteristics of permeable volatile dry ink. According to the characteristics of the all-in-one machine, the ink should meet the following conditions: the internal rationality of the overall structure of various components in the formula; Printing applicability (different types of inks with different properties are used); Practicability of printed text (blackness, quick drying, etc.)Introduction To Ink Related Components Of All-In-One Machine
1. Oil phase.
The oil phase is composed of connecting materials, pigments, additives, emulsifiers, etc.Introduction To Ink Related Components Of All-In-One Machine
(1) Mineral oil, vegetable oil.
Mineral oil is mainly the distillate with petroleum distillation range of 270 ℃ ~ 310 ℃ (about 15 alkanes to 18 alkanes). Using this mineral oil as solvent has strong solubility in resin, rapid solvent release and excellent wetting of pigment particles. Mineral oil should have the characteristics of no odor, strong paper permeability, good resin solubility and release, and small viscosity temperature denaturation. Its main technical indicators include: color, odor, density, flash point, flash point, kinematic viscosity, point, point, acid value, aniline point, carbon ring analysis, viscosity index, etc. Introduction To Ink Related Components Of All-In-One Machine
The color is generally light yellow and white. The flavor is that the refining depth is insufficient. The flash point with density of 0.88 ~ 0.93g/cm3 is generally above 170 ℃, the kinematic viscosity of 25 ~ 30mm2 / s and the inclined point of 425 ~ 435mm2 / S is generally aniline point below – 15 ℃. Between aromatic hydrocarbons and chain hydrocarbons, if it is too high, the oil contains chain hydrocarbons.Introduction To Ink Related Components Of All-In-One Machine
If it is too low, the oil contains aromatic hydrocarbons too high, The aniline point with kinematic viscosity of 25 ~ 30mm2 / S is about 76 ℃, the aniline point with kinematic viscosity of 425 ~ 45mm2 is about 4.5mmm2, and the aniline point with kinematic viscosity of 4.5mm2) is 76 ℃, and the kinematic viscosity is 4.5m2. Commercial mineral oils can be 270#, 280#, 32#. Vegetable oil can choose soybean oil, flaxseed oil, sesame oil, tung oil, etc. Ink is generally mixed with several oils to learn from each other and achieve the best effect.Introduction To Ink Related Components Of All-In-One Machine
The resin is an integral part of the ink film. The three-dimensional network structure is attached to the paper to form a hard ink film and give the ink system appropriate viscosity. The printing base material of all-in-one machine ink is paper. Alkyd resin with long oil content, calcified rosin resin, rosin modified phenolic resin, low-fat phenolic resin, petroleum resin, C9 resin, etc. can be selected.Introduction To Ink Related Components Of All-In-One Machine
It is best to mix more than two resins to pay attention to the overall inkability of the ink in proportion. Also pay attention to the compatibility of oil and resin, the wettability and gloss of resin to pigment. The resin is easy to analyze and the film is easy to oxidize in the air. The resin in the market is difficult to meet the requirements of all-in-one machine ink.Introduction To Ink Related Components Of All-In-One Machine
Generally, the manufacturer of all-in-one machine ink factory chemically modifies the resin to meet the overall requirements of the ink and improve the comprehensive performance.Introduction To Ink Related Components Of All-In-One Machine
Generally speaking, oil and water do not dissolve with each other. In order to obtain relatively stable emulsion, emulsifier must be added to reduce interfacial tension. Emulsifiers are generally composed of non-ionic surfactants, whose molecular structure is composed of hydrophilic polar groups and lipophilic nonpolar groups. Surfactants with HLB value (hydrophilic lipophilic equilibrium value) = 2.5 ~ 5 are selected to form a water in oil (w / O) dispersion system in which water is dispersed in oil. The choice of emulsifier is the most important part of the ink system and the decisive factor for the stability of all aspects of the ink.Introduction To Ink Related Components Of All-In-One Machine
It is the connection of water phase and oil phase. It plays the role of bridge and is very important. The dosage is 3 ~ 4%.
In the structure of mineral oil, vegetable oil and resin, there are many unsaturated and unstable double bonds, which are easy to be oxidized by oxygen in the air and cross-linked and dried. After adding a strong reducing agent, it can protect the aging and crust caused by oxygen, heat and sunlight, and can preferentially contact oxygen, so as to slow the drying process. Optional: 2246, DNP, 4010NA, ANP, etc.Introduction To Ink Related Components Of All-In-One Machine