MGA7 type ink is a two-liquid reaction type multipurpose gravure printing inks, a variety of film has good adhesive strength. Meanwhile printed matter having excellent resistance to applied boiled and frozen applications.
Ink characteristics
1, applies to the physical properties of demanding applications.
2, required for use in water resistance, alkali resistance purposes.
Suitable film
1, surface treatment BOPP (including modified BOPP)
2, surface treatment PET
3, surface treatment Nylon
4, surface treatment PE
5, cellophane (PT)
6, the surface treatment CPP
NOTE: MST (moisture-proof cellophane) film occurred stick back high risk, hoping not to be used.
Instructions
Curing agent CAT (A #) of the ink stock solution added (weight ratio):
Color ink 8%
White 4%
Varnish 8%
Precautions:
1, when necessary, the dose may be increased or decreased in order to achieve the necessary curing properties.
2, explained in advance, for a given resistance, hue and restricted the amount of added curing agents also changed.
3, the curing agent at a temperature below 20 ℃, the reaction is very slow, after the print must be fully matured in order to play a two-performance
4, added note: hardener accurately weighed, was added and stirred well before printing. After addition of the curing agent, the service life of the ink is about 24 hours, the residual ink can not be used.
5, save Note: When you save a curing agent is not mixed with water and alcohols. Vapor in the air easily reacts with the curing agent, sealed immediately after use. Curing agent when mixed with water or alcohols occurs when stored for too long after the production as well as increase in viscosity and in vitro. If you use alcohol mixed with water and a curing agent, the ink film will be insufficiently cured, resulting in adhesion, alkali resistance, boiling poor performance, can not play the original function. Claim your situation before using the curing agent before use. Added ink curing agent can not be mixed with water and alcohol, please be careful.
6, add the amount of sticky back relationship: curing agent component prior to the reaction with the primary resin curing ink occurs, and plasticizers similar functions. Adding large, easily lead to sticky back. Therefore, depending on the amount of films to choose, you can improve the resistance of the adhesive backing. Poor adhesion to the initial film, such as cellophane (PT), treated BOPP, uncoated surface treated PE, coextruded multilayer film, K coating film, added in an amount of 4%, the resistance becomes good adhesive back. If you do not fully dried, residual solvent coating more prone to sticky back, ink components due to excessive heat in the resin becomes soft, prone to stick back. To improve stick back phenomenon, please use the following method: Baimo add 4%, the amount of color ink is reduced to 0-4%, but cause side effects, please confirm applicable only after the performance.
7, the relationship between the amount of the ink film characteristics: The addition amount of the curing agent, the reaction of the ink film is not sufficient, then the low resistance, solvent resistance, oil resistance, adhesion strength in different colored ink film is as follows: cellophane processing OPP, treated PE, at PET, nylon, after the initial printing then bad, then good place after a day. Optimal dosage 4-8% curing agent. Then nothing to do with the amount of intensity on K coated film, MST film, immediately after printing to get good bonding strength, optimal dosage 8%.