plastic flexible packaging printing are usually used in gravure printing technology, the use of ink can be divided into three parts, *, pigment, the pigment and fuel (
Organic pigments and organic pigments)
;
Second, exhibition, including resin and solvent (
Is divided into the natural resin and modified and synthetic resin)
；
Third, additives, divided into surface active agent, antistatic agent, antifoaming agent, plasticizer, wax and other.
pigment (
Fuel, filling material)
: color ink stains dosage is 8% ~ 12%, the dosage of the white film titanium dioxide in 20% ~ 33%.
Exhibition of pigment (
Also known as connection material)
: solid resin (
Film-forming components)
Is 25% ~ 35%, organic solvent (
Volatile components)
Is 40% ~ 60%.
Auxiliary agent: 0.
5% ~ 4%.
In above the concentration of the raw material, pigment, solid resin, organic solvent is three main elements of plastic flexible packaging gravure printing ink, it determines the ink key performance.
is the role of pigment in the ink for ink color and various patience, such as light fastness, weather resistance, heat resistance, resistance to acid and alkali, etc.
Plastic flexible packaging gravure ink is mainly to the requirement of pigment has bright color, texture is soft and will not wear plate cylinder;
Connected to the resin material has the good affinity, easy to disperse in the links of material, no chemical reaction, not the precipitation in the printing process, good dispersion;
Not going to happen in the process of storage coagulation and precipitation phenomenon;
In scattered across the link material can render good liquidity, not deterioration due to storage;
Will not occur in the corresponding solvent system appeared discoloration, fading, and have a good system of drying solvent release;
Strong tinting strength, low oil absorption, pigment sublimation phenomenon should not occur.
is composed of gravure ink and above, to the requirement of pigment can only print strictly in accordance with the operation process to qualified plastic flexible packaging products.
