• May 26, 2021 Introduction of CPP resin
    Sunman’s CPP resin is a thermoplastic resin produced by the chlorination of polypropylene. It is a non-toxic white or light yellow granular solid and can be easily soluble in organic solvents such as chlorinated hydrocarbons, toluene, butanone or other mixed solvent. And it has high hardness and good properties of wear-resistance, acid-resistance, salt water resistance and aging- resistance. Chlorinated polypropylene is produced by means of trichloromethane solvent method in the production process, which dissolves polypropylene in the solvent, and then passes into chlorine gas for chlorination reaction. After the chlorinated solution is removed, the chlorinated polypropylene solution is obtained, and the chlorinated polypropylene solution is dried and granulated to obtain chlorinated polypropylene products. Our CPP resin has strong adhesive force on polypropylene, polyethylene, paper and aluminium coating. Therefore it is widely used in printing ink, coating and adhesive field. Its main uses are as following: 1 It is used as main resin compound printing ink production for BOPP thin film. 2 It is used as main resin for adhesive production, such as, adhesive for BOPP thin film and paper, inner coating of BOPP thin film pressure sensitive tape. 3 Because of fine film-forming property and gloss, it is used as coating in polypropylene PEPP.
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  • May 15, 2021 What types of printing are used for flexible packaging?
    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
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  • May 06, 2021 What is polyamide resin?
    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.
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  • Apr 20, 2021 The Applications of Ketone Resin
    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.
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