Polyamide resin is the main raw material for ink production. So it effect cost of ink directly if polyamide resin is keeping rise sharply. Since last year, the price trend of polyamide resin has been on the rise. What causes polyamide resin prices to continue to rise? Let's share some informations as follows; It is well known that the main raw material of polyamide resin is oleic acid. With the development of biodiesel industry, a large number of oleic acid raw materials have poured into the biodiesel market, resulting in a shortage of oleic acid in the plant producing polyamide resin.especially this year the international oil price fluctuates, the overall trend will rise sharply, and the increase will hit a record high in seven years.  China domestic gasoline and diesel prices is keeping rise every month. So it makes there have very large demand for biodiesel in market this year. By the end of 2021, the spread of Omicron mutant virus will bring pressure to the logistics supply chain. Port congestion will continue to ferment, and freight rates will rise all the way. Supply chain congestion has become the biggest driving force for freight rate rise. By this year, the global terminal congestion situation will continue. The freight charges don't drop down. Dow and many other big factories were suddenly suspended due to force majeure from last month. So it makes prices of various chemical raw materials continued to rise, especially the price of ethylenediamine(raw material of polyamide resin) rise sharply. According to this market situation, the price of polyamide resin will continue to keep higher level in the coming months, making it difficult to reduce the cost of polyamide resin. Sunman had export polyamide resin more than 18 years with rich experience So If you need it, welcome to check with us!

Reflective powder can be added into the ink, made reflective ink, screen printing or brushing to fabric or other items. The reflection brightness changes along with the amount of adding powder. Reflective Ink Instructions Mixing Instructions: 1. Choose neutral transparent printing inks 2. Choose reflective powder with small particle size like 20~40um, 30-45um,40-60um , 60-80um 3. Add about 30~50% of reflective powder, by weight, into the clear printing ink. 4. You could add more if brighter ink is required. Adding more powder thickens the solution. 5. Do not grind the reflective powder 6. Use any containers and stir the mixture at high speed. 7. To avoid deposits, you should use high viscosity resins or anti-settling agents. 8. Select a printing ink that is suitable for the surface it is to be printed on. For example, use metal abrasive oil If the surface to be printed on is metal, pls check usage instructions as follows; 1. Viscosity of mixed inks should be between 3000-5000 poise. 2. Viscosity can be adjusted during the printing process with a diluting agent. 3. A base coat of grey or very light color is preferred, especial for uncoated reflective powder. . Applying reflective bead paint on dark colors reduces the reflective effect by as much as 50%. 4. For good retro reflective, the reflective layer should be between 30-50um. 5. If the fastness is not well, little polyurethane can be put in. 6. Ideal mesh size for silk screen printing screens is 60-80 mesh. Smaller screen mesh size are okay as these create a thicker printed layer. 7. One kilogram of reflective powder can be mixed to produce up to 2 litres of reflective ink 8. One litre of ink can cover an area of about 6 square meters. 9. After painting, roll to roll press and dry 3 minute under150°C Solution of getting strong retro reflective: 1. Ink must be clear and transparent, Grey. Yellow. Red will be better. 2. Firstly, print aluminum powder as foundation. Then print with the mixture of ink and reflective powder. 3. Make the reflective powder on the paint surface as more as possible.

Gravure printing ink has been put into production in China for more than 30 years. According to the connecting material, it can be divided into chlorinated polypropylene, polyamide and polyurethane. Chlorinated polypropylene ink currently accounts for half of food packaging, but its development is limited by insurmountable shortcomings:1) non-environmental protection, requiring a large dose of aromatic hydrocarbons such as toluene as solvent, aromatic hydrocarbons volatilized into the environment during the printing process, causing pollution; 2) unsafe, toluene and other aromatic hydrocarbons are slow drying solvents, easy to remain on the ink film, causing pollution. Packaged food is easy to volatilize into the air, harmful to consumers' health. 3) Narrow scope of application, only for BOPP film has good printing adaptability. Because of the low melting point and decomposition temperature of chlorinated polypropylene resin, it is difficult to be used for boiling and cooking food packaging requiring high temperature. Polyamide inks also mainly rely on aromatic solvents. Although there are a few alcohol-soluble products, the poor temperature resistance and water resistance of polyamide resin limit its application in cooking packaging. Polyurethane ink without benzene solvent has the advantages of low toxicity, good printing adaptability to various plastic film materials, high temperature cooking resistance, freezing resistance, wear resistance, good gloss of printing products, etc. Obviously better than the former two, with strong development potential. Black, blue, red, yellow four-printing composite inks for PET, NY, BOPP film were prepared by adding dispersant, dumb powder, environmental protection pigment, solvent and other additives with polyurethane resin as the main linker. It is a polymer used in printing inks. Dyeing power, fineness, viscosity, initial dryness, surface tension, residual solvent and boiling resistance were determined and analyzed. After testing, the series ink formula is simple, does not contain benzene, ketone, solvent residue is less than 1.0 mg/m2, meet the requirements of food packaging. It is a kind of safe, environmental protection boiling general type. The utility model relates to a new gravure printing compound ink product. Vinyl Resin For gravure composite printing inks for flexible packaging of food are mainly used in plastic packaging. The adhesion fastness of the ink obtained from this formula on NY and PET film is much higher than the requirements of domestic industry, and the adhesion performance is excellent. This is due to the strong interaction between the polyurethane resin molecules with polar structure and NY and PET molecules with the same polar structure. Polyurethane resin molecules and PET molecules have ester groups, intermolecular force is strong. The measured value is 100%. BOPP is a typical nonpolar molecule. The interaction between BOPP and polar polyurethane resin molecules is weak, and the b...

Dear Customers, As it's known, the International Workers' Day, also referred to as Labor Day or May Day, comes on this Sunday. More than 80 countries across the globe, including China, are celebrating International Workers' Day on the first of May. To let you know that, as here in China in celebration of the Labor Day, we are having a five-day public holiday from Apr.30th to May.4th. We will be back to work on May 5th, 2022 (Thursday). We feel sorry for any inconvenience to you. However, please feel free to contact us via email at info@sinosunman.com or mobile phone at +86 13721078505 if you there is anything urgent. For inquiries, you are always welcomed to submit through the online inquiry forms. We will respond to you as soon as possible. Sunman wishes you a nice holiday!