Polyamide Resins for Printing Inks
Uniform Synthetics is a polyamide resin manufacturer in India, producing solid Unimide binders for flexographic and gravure printing inks across co-solvent, alcohol-soluble and untreated-polyolefin grades.
Grades
8 grades| Grade | Range | Viscosity | Softening Point | Acid Value | Amine Value | Amine / Acid | Applications | TDS |
|---|---|---|---|---|---|---|---|---|
| Unimide US-25 Yellowish beads SolubilityFully soluble in ethanol | Alcohol-Soluble Polyamide | 20–22 sec (FCB4 @30°C, 50% Ethanol) | 105–115 | 7 | 7 | Not specified | Alcohol-based inks · Food and milk packaging printing | Request |
| Unimide US 30 Yellowish beads SolubilityIPA-based blends | Alcohol-Soluble Polyamide | 25–35 sec (FCB4 @30°C, 50% IPA) | 105–115 | 7 | 7 | Not specified | Flexo and gravure inks | Request |
| Unimide US 40 Yellowish beads SolubilityToluene : Butanol (2:1), compatible with IPA | Co-Solvent Polyamide | 30–50 sec (FCB4 @30°C, 40% Tol:But 2:1) | 110–120 | 7 | 7 | Not specified | Flexo and gravure inks · High-gloss liquid inks | Request |
| Unimide US-50 Bright yellowish beads SolubilityToluene : Butanol : IPA blends | Co-Solvent Polyamide | 45–55 sec (FCB4 @30°C, 40% Tol:But:IPA) | 110–120 | 7 | 7 | Not specified | Flexo and gravure inks · Thixotropic paints | Request |
| Unimide US-60 Bright yellowish beads SolubilityToluene : Butanol : IPA blends | Co-Solvent Polyamide | 50–60 sec (FCB4 @30°C, 40% Tol:But:IPA) | 110–120 | 7 | 7 | Not specified | Flexo and gravure inks · Thixotropic paints | Request |
| Unimide US 77 Brown bead shape SolubilityAlcohol / co-solvent | Polyamide for Untreated Surfaces | 25–35 sec (FCB4 @30°C, 50% IPA) | 105–115 | Not specified | Not specified | >7 / >7 | Flexo and gravure inks on HDPE/LDPE · Difficult-substrate ink systems | Request |
| Unimide US 7910 Yellowish beads SolubilityIPA | Alcohol-Soluble Polyamide | 20–25 sec (FCB4 @30°C, 50% IPA) | 105–115 | 7 | 7 | Not specified | Flexo and gravure inks · Over-print varnish · NC ink hardness and resistance booster | Request |
| Unimide US-80 Bright yellowish beads SolubilityCo-solvent (Toluene : Butanol blends) | Co-Solvent Polyamide | 70–80 sec (FCB4 @30°C, 40% Tol:But 2:1) | 110–120 | 7 | 7 | Not specified | Flexographic and gravure inks · Thixotropic paints | Request |
On phones, each grade is shown as a complete technical record.
Technical overview
Unimide solid polyamide resins are designed as binders for solvent-based flexographic and gravure inks. Selected Unimide polyamides for printing inks provide documented gel resistance: US 7910 offers excellent gel resistance and thaw property, while 7399 offers excellent wet-pack and gel resistance. The range includes co-solvent, alcohol-soluble and untreated-polyolefin grades with different solubility, softening point and viscosity profiles. Final selection should be tested with the actual solvent blend, film, surface treatment and press conditions.
Selection considerations
- Solvent routesThe range includes co-solvent and alcohol-soluble grades for different ink vehicles.
- Print processesUnimide grades serve solvent-based flexographic and gravure printing inks.
- Grade characteristicsSolubility, softening point, viscosity and amine or acid value distinguish the grades.
Polyamide ink resins technical information
What is polyamide resin used for in printing inks?
Polyamide resin is a solid binder for solvent-based flexographic and gravure inks. It is dissolved in a suitable solvent blend and combined with compatible pigments, plasticisers and other resins. Evaluate the complete ink for printability, resolubility, adhesion, blocking and film performance.
What is the difference between co-solvent and alcohol-soluble polyamide resin?
Co-solvent grades use solvent blends such as toluene and butanol, with some grades also accommodating isopropyl alcohol. Alcohol-soluble grades are designed for alcohol-based systems such as ethanol and isopropyl alcohol. The grade, resin concentration and solvent balance determine dissolution, viscosity and storage stability.
Which Unimide grades offer gel resistance?
US-7910 is listed for gel resistance and thaw behaviour. US-7399 is listed for wet-pack applications and gel resistance. These properties are grade-specific: check the current technical data and confirm behaviour at your resin concentration, solvent balance and storage conditions.
Which polyamide resin can be evaluated on untreated HDPE or LDPE?
Unimide US-77 is used for flexographic and gravure ink trials on untreated HDPE and LDPE. Adhesion depends on the film grade, additives, surface condition, ink formulation and drying conditions. Test on the actual production film using an agreed adhesion test.
Are solid printing-ink polyamides the same as liquid epoxy hardeners?
No. Solid polyamide ink resins act as binders in printing inks. Liquid polyamide epoxy hardeners react with epoxy resin to cure a coating or other system. They have different forms and functions and should not be substituted for one another.
Can Unimide polyamide resins be supplied outside India?
Yes. We manufacture Unimide polyamide resins in India and supply customers in India and international markets. Share your formulation requirements and destination so we can confirm grade availability, packaging, samples and technical documents.
How can I request a polyamide resin sample or TDS?
Send us the printing process, substrate and surface treatment, solvent blend, binder and pigment system, print orientation and performance targets. Include your adhesion test requirements. We can help identify grades and provide the current technical data and available samples for laboratory and press trials.