The key role of resins in ink performance

The key role of resins in ink performance

Wednesday, 15 July, 2026

In ink formulation, resin selection is one of the most important factors in optimising properties such as adhesion, flexibility, thermal resistance, formulation stability and colour development.

At Comindex –part of IMPAG Group– we are pleased to highlight the KEMPRO range of resins for printing inks, specifically developed for a wide variety of applications, including printing on flexible films, PVC and metallised substrates.

With more than 30 years of experience in the chemical industry, KEMPRO offers solutions for the formulation of:

Flexographic inks
Gravure inks
Nitrocellulose (NC)-based systems
NC-free, polyurethane-only systems
PVC inks
Primers and coatings for flexible packaging

PU resins for NC and polyurethane-only inks used in flexible packaging

KEMPRO solvent-based polyurethane resins are specifically designed for inks used in the printing of flexible films intended for food packaging. In these formulations, PU resins provide:

Excellent flexibility
Outstanding adhesion to polyolefins
Excellent heat resistance
Vibrant colours
High opacity
Compatibility with a wide range of systems

Key product ranges for ink formulation

KROL PPF

A range of conventional polyurethane resins for gravure and flexographic ink formulations in NC-based systems. Key benefits include:

Excellent adhesion to plastic films
Good heat, abrasion and blocking resistance
High water and oil resistance
Excellent formulation stability
An excellent balance between flexibility and strength

KROL PUP

A range of elastomeric polyurethane resins developed for gravure and flexographic ink formulations in NC-free systems, where enhanced performance is required in terms of:

Increased flexibility
Mechanical and thermal resistance
Excellent lamination performance
High rub resistance

Particularly recommended for demanding flexible packaging applications.

KROL ACS & KROL BMMA EA

Thermoplastic acrylic resins for PVC ink formulations and specialised applications. Key properties include:

Excellent transparency
Fast drying
Excellent adhesion
Excellent pigment compatibility
High resistance to blocking, UV exposure and abrasion
Excellent chemical and hydrolysis resistance

Acrylic Primer for Metallised Substrates

The range is completed by KROL LAK M, an acrylic lacquer developed as a primer for:

Metallised OPP
Metallised PET
Aluminium foil

Its key properties include:

High UV resistance
Excellent transparency
High gloss
Excellent adhesion to metallic surfaces

KEMPRO resins enable the development of ink formulations that meet today's demanding requirements for flexible packaging, industrial printing and flexible printing applications, delivering an outstanding balance of technical performance, formulation stability and application versatility.

Source: https://hispaprint.com/blog/disenografico/que-es-la-impresion-huecograbado/

Source: https://packagemanufacturer.com/what-is-gravure-printing/

Source: https://dical.es/blog/news/que-es-y-como-funciona-el-huecograbado

At Comindex –part of IMPAG Group– we can support you throughout your process. Simply contact our team of technical sales advisors.

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