After the dry compounding, when checking the quality of the compound film, everything is relatively normal, but when the bag is cured, it is found that there are a little bit of white and gray on the white ink of the background color (also on other inks), why? How to prevent it? This article analyzes one by one for reference. the reason: After the composite ink is reverse-printed, it is dry-composited. At this time, the dry multiplex adhesive is a polyurethane glue with ethyl acetate as the solvent. Ethyl acetate is a good solvent for the binder in the composite ink. Coated with polyurethane glue, part of the ethyl acetate is absorbed by the binder in the ink layer and dissolved in the binder. After drying, the ink "wet" with ethyl acetate is still on the inner layer of the ink. From the front of the ink layer, no problem can be seen. After aging at 45 ~ 60 ℃ for 2 ~ 4d, the ethyl acetate compounded in the ink layer gradually penetrates from the inner layer to the front side, and the place that is "wet" by a very small amount of ethyl acetate is gray, but not " The "wet" place still maintains the whiteness of titanium dioxide. It's like painting lime water on a wall. The lime water just painted is gray, and the dried one is white, so it forms vitiligo spots. Ways to prevent: 1. The compounding speed during dry compounding is slower; 2. The temperature and air volume of the drying and drying tunnel are higher and larger; 3. The content of the dry multiplex glue used is a little bit thicker, so that the amount of ethyl acetate is less, and it is easy to dry thoroughly in the drying tunnel. 3 seater Leather Sofa has different sizes, it has the large 3 seater leather sofa and the small 3 seater leather sofa for your choices. We also have different colors for your choices, such as black, brown, grey, white, etc. The 3 seater leather sofa can also have dunctions of dropdown table with cupholders, USB charging, loud speaker and so on. 3 seater leather sofa is very soft, durable and more comfortable. 3 seater leather is the representative of luxury.You can choose the size suitable for you. 3 Seater Leather Sofa,Leather Sofa Set Price,Navy Leather Sofa,Cheap Leather Sofas,l Shape Leather Sofa Kaifeng Lanwei Smart Home Co., Ltd , https://www.leather-recliner.com
When curing the bag, the background ink has white and gray ideas, how to prevent it?