Flexible packaging has now become popular in various industries ranging from consumer products to industrial applications. Both flexographic and gravure printing methods are used for flexible packaging printing. From an ink point of view, inks for flexible packaging can be divided into surface printing inks and lamination inks. For the most part, flexographic and gravure inks share the same raw materials, so for this matrix we will group both printing methods together. Types of Flexible Packaging Inks: 1. Lamination Inks Lamination is the process of combining two or more substrates to form a tough packaging structure to hold and provide barrier protection for the contents. Lamination can be accomplished with adhesives (adhesive lamination) or with molten plastic (extrusion lamination) that acts to adhere to the packaging films together. Lamination inks are typically sealed inside the lamination structure so that the ink surface is not exposed to the outside, however, the inks must still exhibit excellent adhesion to the film on which they are printed and they must not interfere with the bonding of the lamination films. 2. Surface Printing Inks High gloss Excellent rub resistance Resistance to a number of different external elements, such as water, solvents, detergents and other materials that may come into contact with the printed surface These type of inks uses a protective overprint varnish in order to increase the surface resistance and impart the desired C.O.F. and gloss

Polyamide resin is reacted from dimer acid and diamine. This product is mainly used in gravure plastic printing inks and paper printing inks. It has very good adhesion on polyethylene material, especially be fit for printing on polyethylene film, plastic film such as tinsel composite laminated film. The printing ink which is made from this polyamide resin has good adhesion, high gloss, low freezing point, good solvent release and good compatible with nitrocotton. Our Main products： Co-solvent soluble polyamide resin It is a kind of solid polyamide resin which can be soluble in mixed toluene/IPA solvent. When used together with solvent,pigment and filler,it can be formulated into varied of printing ink with bright colour,fast dryness,water resistance, folding endurance and chemical stability. Alcohol soluble polyamide resin It is a kind of solid polyamide resin which can be soluble in IPA solvent with high inoxidizability. Normally it is widely used in printing inks. It can imporve the advanced procedure and unique adhesion on PE, PP, PET surface. It also can firmly adhere to the surfaces of most dealt plastic and metal films when in high softening point. Ester soluble polyamide resin New Eco-friendly Ester soluble polyamide resin (low temperature resistance type ) is yellowish granula transparent solid. It performs stable characteristics, good solubility in ester solvent, good solvent release, high gloss and good adhesion, good resistance to bend. If any type polyamide resin you are interesting, pls feel free to contact us.

Ketone resin is a kind of hard resin with high photo stability. It's non-toxic and light-coloured. And it's soluble in any solvent used in coating industry except for fatty alkane and water. Sunman's ketone Resins can be used as co-binders in paints, adhesive, printing inks and other inks. They not only increase the solids content and accelerate drying speed but also improve numerous properties such as hardness, gloss and film build. For Inks In printing inks, such as laminated ink, gravure printing ink, surface printing ink, flexography ink, anti-forgery ink and ball pen ink, adding Ketone Resin ( 2 -15% in ink formula) can improve pigment wetting, luster, adhesion, printable, solid content and drying time. Ketone Resin can resolve the problem of poor adhesion on some substrates, such as PE, PP, PET and PVC and also improves fluidity and adhesion of ball pen ink. It can be used also in food packing ink. For Adhesives It is very suitable to manufacture nitrocellulose adhesive, which can be used for leather, paper and other similar material. For Paints Ketone Resin can make the products have high hardness, gloss and flexibility. At the same time it can reduce viscosity and decrease pitting and improve adhesion , leveling and solid content. It is suitable for producing hammer finish, nitro-metal paint, such as mechanical finishing paint, wooden varnish and transparent stable color paints.

What is Gravure Ink? Gravure (Rotogravure) inks are solvent-based ink with low viscosity, which can be quickly dried by vaporization. The advantages of gravure printing lie in the high, consistent, and continuously reproducible print result. Further, the benefit of fast-drying ink contributes to an immediate post-finishing of the printed goods. The ink is usually used in commercial printing of flexible materials, such as magazines, postcards, corrugated cardboard, plastic films, aluminum foil for product labeling, and all consumer packaging. What resins Sunman can supply? Sunman has a variety of raw materials being offered for gravure inks. These are the following: 1. CEVA Resin It is the resin for gravure reverse printing on flexible packaging film such as OPP, BOPP, etc. 2. Chlorinated Polypropylene (CPP) Resin It enhances the adhesion to the substrates such as BOPP, OPP, etc. It is also the main resin for gravure reverse printing. 3. Polyamide resin It is a resin for gravure suface printing. It can be used on paper, PE, and PP substrates. 4. Vinyl chloride and Vinyl isobutyl ether resin It is a resin for gravure reverse printing on flexible packaging substrates such as BPP, OPP, etc. It improves the compatibility of EVA and CPP resins. 5.Vinyl chloride and Vinyl acetate copolymer resin It is a modifier resin to improve flexibility, adhesion, and heat-sealing properties of the ink. It is a resin for gravure reverse printing inks. 6. Polyurethane resin It is one component, high performance PU resin for gravure lamination or surface ink. It has excellent adhesion property on OPP, PET, NY and other films.