Screen printing consists of five elements, namely a screen printing, squeegee blade, ink, printing station and substrates. Screen printing the basic principle is: the use of a screen printing ink graphic part of the mesh through plastic bags, non-graphic parts of the mesh impervious basic principle of printing ink. Pour in the screen printing plate at one end of the ink, put some pressure on the Northeast plastic bags with squeegee blade in screen printing ink on the site, while moving towards the other end of the screen plate. Ink is extruded from the cell scraper graphic part of the move to the substrate. Due to regular and highly crystalline structure, so the melting point of up to 167 ℃, heat, steam sterilization products available is its advantage. Density of 0.90g / cm3 plastic bags printing, is the lightest general-purpose plastics. Xiong resistant plastic bags, tensile strength 30MPa, strength, rigidity and transparency better than polyethylene. The disadvantage is poor low temperature impact resistance, easier to aging, but can be modified to be overcome and the addition of antioxidants, respectively. Woven color is generally white or off-white, non-toxic and tasteless, bodily injury is generally small, although it is manufactured by a variety of chemical plastic made, but its strong environmental protection, and recovery of larger efforts; mechanical printing refers to print process is completed by the mechanical action. Which is divided into semi-automatic and automatic printing, semi-automatic loading and unloading of substrates means by manual operation, the printing is done by machinery; automatic refers to the entire printing process is completed by the machinery. ▼ 8. How Screen printing is classified? Screen printing not only adapt to the general printing paper, and a very wide adaptability. For example: ceramics, glass, printed circuit boards and the like. Depending on the texture of the substrates, printing on different, though among the various series inextricably intrinsically linked, but different substrate materials (that is a different chemical and physical properties), each has its own peculiarities. Vegetables bags plastic bags in agriculture is another major use most vegetable bags, whether it is potato, tomato, or a variety of vegetables, when farmers use plastic bags full of heavy pick vegetables, most happy than Sheen hard labor was bitter harvest, transparent mesh bags and bags in the vegetable packaging plays a crucial role. Can clearly see inside bags of fresh vegetables through the mesh bags and transparent bags, there will be a large number of farmers every day with the two plastic bags. Lined with plastic bags, plastic bags, packaging provided by Xiong Yu Xin Yu Xin plastic packaging plant. Xiong Yu Xin plastic packaging plant (www.xinyusl.com) (www.xinyusl.com) strong, credible, Baoding in Hebei composite packaging products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yu Xin into the brilliant packaging and you work for a better future!