Water-based laminating inks

In addition to polyamide, lamination inks ordinarily contain modifiers such as polyketone resin, plasticizer, and wax to impart specific properties such as block resistance and increased bond strength. Because laminating inks are usually reverse-side printed and end-up sandwiched between films, gloss is not a primary requirement. Water-base laminating inks that will meet the U.S. EPA emission requirements and have the correct functional properties are currently under development. 

Uses Acrylic for clear wood finishes, industrial kitchen cabinet and furniture finishes, water-based lamination inks, and surface printing inks Features Mar resist. good chem. and water resist. exc. UV stability ... 

The composition and solvency is limited to prevent swelling of rubber or photopolymer-based rolls. Water, alcohols, minimal concentrations of acetates (i.e. ethyl, isopropyl alcohol), and minor levels of aliphatics such as heptane are mostly used. Acetates and aliphatics are used to solubilize polyurethane and polyamide resins used in solvent based laminating ink Only aqueous ink is discussed in this chapter. A diagram of a flexographic press is given in Fig. 5-1. 

Water-based or aqueous inks are prevalent on the desktop and enjoy the advantage of being relatively inexpensive and environmentally friendly, but penetration in industrial applications has been slow for a variety of reasons. Water-based inks tend to require porous or specially treated substrates or even lamination to impart durability and the ink tends not to adhere to non-porous substrates. Additionally, many piezoelectric industrial print heads are incompatible with water-based ink formulations, although this is changing in some part due to market demand for systems that can jet water-based biological or food contact fluids. 

Uses Abrasion resist, aid, toughener, flexibilizer, hardener, gloss aid in water-based coatings (automotive OEM, refinish, primers, basecoats, topcoats), adhesives for wood/plastic/metal substrates, inks binder in waterborne inks, bonding and laminating applies. 

Transaction cards made of PLA are as durable as polyethylene, polyvinyl chloride (PVC) or polyethylene terephthalate. Most of the existing plastic cards are made for single use, such as gift cards or prepaid topup cards. There are millions of regular hotel key cards, loyalty and transaction cards produced every year. PLA cards have good adaptability to cope with security features and magnetic strips. They have durable characteristics and can be film laminated. Water-based acrylic and solvent-based nitrocellulose and polyamide are the suitable inks for... 

Flick, W.F., 19W, Handbook of Adhesives Raw Materials, 2nd Ed., Noyes Fhibhcations. Gilbertson, T.J., 1991, "Mixing Water with Electrical Energy Successful Printing with Water Based Inks," Polymers, Laminations and Coatings, TAPPl Press, Atlanta. 

Uses Urethane-acrylic, solv. resist, aid, abrasion resist, aid in coatings, screen inks, overprint varnishes, wood coatings, plastic film, laminating adhesives, floor tile, and metal coating finishes Features Resilient, nonyel. supplied as base resin or as resin/monomer blends which offer resilience, water-wh. clarity, and exc. heat and light stability to UV/EB-cured prods. 

Modified resins or resins based on p-ferf-butylphe-nol or other alkyl-substituted phenols are used for surface coatings as protective and isolating varnishes for packing due to their water-repellent properties. Modified resins can be used as a binders in inks, typewriter correction papers and different laminates. 

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