SINTOCHEM is an Italian Company that produce and commercialize special resins apt for formulation of inks designed for the flexible packaging industry.
SINTOCHEM sells the own resins all over the world, is leader of the Italian market in the field of polyurethanes for flexo e rotogravure inks and offers a complete choice of products with a wide range of properties.
These results has been obtained thanks to the elevate quality standards and to the constant attention dedicated to research and development of new tailor made products.
A BRIEF OVERVIEW ON THE WORLD OF INKS
The birth of the global market forced the printing inks industry to bear away from the old local or national territorial conception and to become accustomed to the new internationalisation requirements.
During of the last decades we assisted to a considerable development in the field of the liquids inks, above all in the packaging industry field.
SINTOCHEM has chosen to focus the own activity just on such field, playing particular attention to follow the fast developments of the printing technologies with the consequent changes in market conditions and customers’ requirements.
Thanks to a remarkable trend of increase, the inks European market reached in the last years greater amounts of 960.000 tons with a turnover higher than three billion Euro even if currently the ink producers in Europe aren’t as numerous as in the varnishes’ field.
Until the last ‘60s were customarily formulated polyamides-based inks in order to guarantee a good adhesion on polyolefin substrates.
Using these resins involved some problems such as: residual odour, low thermo-resistance and tendency to tixotropy;
the last trouble was frequently avoided adding a small amount of an aromatic solvent (typically toluene).
At the beginning of the ‘70s an important American company patented and produced some flexography inks based on nitrocellulose modified with polyurethane.
The excellent ink’s adhesion on polyolefin supports was assured through the addition of a small amount of adhesion promoter at the moment of use.
Still now this technology is largely used for the production of inks destined to the packaging industry.
The SINTOPOL are the polyurethane resins at the base of this technology, renewed and reviewed during the years in adaptation to the requirements of the market.
SINTOPOL are non-reactive polyurethane resins characterized by a special compatibility to nitrocellulose, excellent cohesion, effective adhesion, good solubility, low odour and fast solvent release.
They are appropriate for internal and external printing and in the most cases are available in 100% solid content versions, without any volatile solvent.
The SINTOPOL range consists of resins able to form films with different hardness and viscosity to deal with various printing requirements.
The hardness sequence, from the softest to the hardest, is the following:
Generally the softest have the better performance as plastifiers, while the hardest are less flexible and have superior adhesion properties.
SINTOPOLS are easily soluble in all the solvents with a moderate polarity, such as: ketons, esters, ethers, alcohols.
Solubility in ethyl alcohol change as the following series:
Solubility in ethyl alcohol:
SP 75LV > SP75 > MD95 > MD 100 > MD 110 > MD 120
The inks obtained from SINTOPOL resins have very fast dry-times (they are suitable also to printing rate higher than 300 m/min), high hot-sealing resistance and good adhesion on a multiplicity of plastic films.
The thermo-sealing resistance of nitrocellulose-based inks modified with SINTOPOL and Titanium Dioxide can reach 120-130°C for almost 1-2 seconds.
Using an appropriate cross-linking catalyst, the thermo resistance could go over 180°C after 24-48 hours.
The thermo-resistance increase could be obtained also introducing in the ink formulation, when it is possible, a greater nitrocellulose percentage.
SINTOCHEM produces also hydroxylate polymers for external printing inks with a high gloss degree and scratch resistant.
SINTOPOL 155/55 E.A. (Acrylic Resin)
SINTOPOL E 222/100% (Saturated Polyester Resin)
Both of these products are currently used in formulation of two components inks (2K) usually cross linked with isocyanate adducts.
All the SINTOPOLs :
- According to FDA regulations are made with permitted substances for use as components of articles in food packaging (#21- CFR 175.105 ; #21- CFR 175.300).
- Are produced without Tin catalysts and don't contains any Tin organic compound.
- Are produced in agreement to the European community-regulation 90/128 and subsequently revisions.
Via Carolina Romani, 1/11
I-20091 BRESSO (MILAN) - ITALY
Tel.: ++39 026103166
Fax: ++39 026105708
E-Mail : email@example.com
Web site: www.sintochem.it