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KAR NTNK

(A multipurpose Non-Toluene Non-Ketonic Gravure Reverse Printing Ink)

Description: KAR NTNK is the series of toluene & Ketone free low odour lamination inks having high bond strength, excellent printability and specially designed for reverse printing on treated BOPP and Polyester film (38-40 DYNES).

Application: The low odour and low solvent retention characteristics make it particularly suitable for the packaging of food products e.g., Coffee, Biscuits, Snack foods, Confectionery etc. A high bond characteristic of Polyester laminates printed with KAR NTNK makes it suitable for packing liquids and heavy weight materials.

Printing Process: Roto Gravure Printing only.

Printing Substrate:

  • PET – Corona treated, chemically treated, plain.
  • OPP – Plain Corona treated, co-extruded (surface tension should be over 38 dynes/cm⊃2;).
  • Nylon – One-side or both-side treated (surface tension should be over 52 dynes/cm⊃2;)

Lamination:

DRY LAMINATION: KAR NTNK inks are excellent for adhesive lamination with recommended substrates, like, Polyethylene, BOPP, Aluminum Foil, Metalized film, Paper, Board etc. Films printed by KAR NTNK can be laminated with a number of two component solvent-based adhesives. The actual bond strength in the printed area is a function of the quality of substrate, ink, adhesive and the adhesive coating weight. It is normally necessary to exceed a minimum adhesive coating weight (approx. 2.0 – 2.5 GSM dry coating weight).

EXTRUSION LAMINATION: (Imine and Poly-isocyanate AC Agent): 2% (by weight) Hardener must be mixed with the ink during printing to achieve good lamination bond strength.

Key Product Features:

KAR NTNK have been formulated to meet some precision requirements of the laminates involving Polyester and BOPP substrates.

  • Non-toluene Non-Ketonic usage – especially suitable for food packaging.
  • Multipurpose application. Packaging for snack to boil and retort packaging.
  • Many specialized applications for various films.
  • Low odour, particularly in BOPP based laminates makes its usage exclusively for food packaging.
  • Low solvent retention
  • High lamination bond in Polyester and BOPP.
  • Good laminating property (acceptable imine and polyisocyanate AC).
  • Good adhesion
  • Excellent printability and tonal reproduction, particularly at higher printing speeds.
  • High colour strength at low viscosity.
  • Fine pigment dispersion ( Below 3 Microns).

Web temperature of 60°C – 70°C is normally sufficient. However, the actual temperature requirement may vary with substrate, process, press conditions and printing speed.

Solvent System:

White & Solid Colours EAc : NPAc: IPA =  50 : 25 : 25
Process Colour, Halftone NPAc: EAc : lPA =  50 : 25 : 25
Retarder Approximately 5 to 10% PGMME addition to above solvent blend

It is essential to ensure efficient solvent removal especially slow drying solvents to avoid blocking and to maintain the low odour properties of KAR NTNK inks.

Shelf Life: The inks and varnishes of this series have, under normal conditions, a shelf life of at least 6 months.

Normal Conditions means:

  • Storage in tightly closed containers.
  • No admixtures
  • Temperature not exceeding 25°C for weeks or 30°C for days
  • Short time excessive-temperatures e.g. at transport are not harmful.
  • The products are not sensitive to frost.

Over-stored inks (typical symptoms: fall in gloss, shift in shade, formation of odour and / or viscosity increase) may normally – (off color being exceptions) - be used the same way as residual inks by controlled admixture to fresh inks. Increased viscosity due to long-time storage of inks may generally be adjusted by addition of a slightly higher amount of thinner than the usual.

Please take note of the following:

  1. The performance results indicated in this literature are only indicative under controlled conditions of laboratory with virgin & standard packaging grade films. Please do not use lower grades or substandard films. Karjen Industry will not take any responsibility for abnormal results.
  2. Liability: While the information outlined is given in good faith, it does not constitute a guarantee and neither is one implied as to the specific end use suitability of any product. The customers should always evaluate the suitability of products to their own satisfaction.
  3. Karjen Industry is responsible only to the tune of replacing the ink consumed in case of any printing related problems clearly assigned to in-compatibility.

Health and Safety:

Read the health and safety guidelines before using these products. The user is responsible for all local legislation requirement and packaging conditions.

Ink Handling: Please refer to general guideline for handling inks for flexible packaging.

For further information, please contact Karjen Industry