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Vinyl / PU – Karbond

vinyl-pu

(PU Base-A multipurpose Reverse Printing Ink)

Description: KARBOND is low odour lamination inks having high bond strength, excellent printability and specifically formulated for reverse printing on treated BOPP and Polyester film.


Application: KARBOND the low odor and low solvent retention features make it suitable for the packaging of food products e.g., Coffee, Biscuits, Snack foods, Confectionery etc. High bond characteristics of KARBOND make it suitable for Polyester laminates to pack 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;)
  • Others – Cellophane, PVA film, EVOH film.

Lamination:

  • DRY LAMINATION: KARBOND inks are excellent for adhesive lamination with substrates like Polyethylene, BOPP, Aluminum Foil, Metalized film, Paper, Board etc. KARBOND printed films may be laminated with a number of two components 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. Normal recommendation is to exceed a minimum adhesive coating weight (approx. 2 – 2.5 GSM dry coating weight).
  • EXTRUSION LAMINATION (Imine and Polyisocyanate AC Agent) to achieve good lamination bond strength, 2% (by weight) Hardener must be mixed with the ink during printing.

Key Product Features:

  • Multipurpose application. Lamination from snacks to boil and retort packaging.
  • Many applications for various films.
  • Low odour in BOPP making it exclusive 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.
  • Colour Range: A full range of colours are available.
  • Desired shades can be obtained by intermixing standard colors at press room level
  • Web temperature of 60°C to 70°C is normally sufficient. However, the actual temperature can vary with substrate, process, press conditions and printing speed.

Solvent System:

Normal drying Ethyl Acetate : MEK : IPA → 60 : 30 : 10
Slow drying Ethyl Acetate : MEK : MIBK : IPA → 60 : 20 : 10 : 10
Retarder MIBK / PGMME

It is essential to ensure efficient solvent removal especially slow drying solvents to avoid locking and to maintain the low odour properties of KARBOND inks. Access addition of MIBK or PGMME may lead to blocking.

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

Normal Conditions means:

Storage in tightly closed containers.

  • No admixture.
  • 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.