With the development of the economy, the use of large bags has become more and more widespread, the technology has become more and more advanced, and the quality has become better and better. However, in view of the current economic environment in our country, it is necessary for us to learn more about tonnage bags to improve our ability to distinguish. Now I will take you to understand the production process of ton bags and be an inspector by the way! The production process of ton bags is: raw and auxiliary materials-drawing-weaving-coating-cutting-printing-sewing-inner bag-inspection-finishing-packing-warehousing.
Tonnage bags generally have inlets, top and bottom seams, slings, upper, middle and lower waistbands, reinforcements, and outlets. In order to ensure the quality, there are strict technological processes and quality inspection points from the raw materials entering the factory to the factory. Only the qualified raw materials can enter the workshop for the first to the drawing process. After the completion, the quality of the drawing is checked, and the qualified start to make rope and prepare. The tape is then woven into cloth, and the inspection is also carried out. If it is qualified, it will start to coat, cut, and re-inspect. If it is qualified, the logo will be printed. The process must ensure that the printing is clear. The inspection process is packaged and stored, and all unqualified materials are returned to the machine for rework in order to save costs.
Tons of bags must undergo various tests before they leave the factory to test whether the products meet the test standards before they can be produced. One of the ton bags is the heat resistance test: we need to take some samples from the bag, compound them with 9.8n, and then bake them in the oven. After an hour, they can separate smoothly. If they are not glued together, it is deemed to meet the standard. The second is the resistance to the fall. In a normal temperature environment, free fall according to a certain test sequence, if the material in the big bag of the big bag manufacturer does not leak out, it is deemed to meet the standard.
Choose screen printing: Ton bag screen printing is a printing method with a very high utilization rate. Choose stencil printing, use the pressure difference to print the ink on the big bag.
1. Dry a photo-effect layout with graphics and text, and then cut it according to the set size. And through the use of wood, aluminum, etc. as the skeleton, so as to obtain the living silk screen.
2. Prepare a suitable ink, and use a squeegee to uniformly change the selected ink on the living screen. This process is called scraping.
3. Stick the ink evenly on the big bag, and the printing is completed.