CEMENT BAGGING PRODUCTION PROCESS

1. PP fiber production:

Polypropylene (PP) plastic granules + additive granules CaCO₃ (In the required percentages according to each customer and product), the mixture is fed into the yarn-making machine. The PP yarn is adjusted according to technical specifications suitable for each type of product, such as width, thickness, tensile strength, and elongation. All adjustments of the weaving yarn’s technical parameters are precisely controlled through the central screen (PLC). The entire production process of PP yarn is closely monitored to ensure that the yarn consistently meets the technical specifications required by the customer. The finished PP yarn is then wound into rolls/tubes according to the specified standards and transferred to the bag weaving workshop

2. PP roll weaving:

PP yarn rolls/tubes, after being transferred from the fiber-making section, are mounted on the weaving machine to undergo the bag weaving process. At Sadico, the weaving machines currently can handle bags with weaving widths ranging from 30 cm to 120 cm

3. Film coating:

When there is a requirement for film-coated bags, the PP fabric rolls are fed into the coating machine, which applies a thin layer of PP film with a thickness determined according to the type of bag. The advantages of film-coated bags include good moisture resistance, enhanced print quality, and increased strength and durability of the packaging product

4. Printing packaging:

The woven rolls, whether film-coated or not, are fed into the Flexo printing machine. The printing patterns are designed by Sadico according to the exact design and specifications requested by the customer

5. Gluey the square bottom and package the finished product:

After printing, the film-coated rolls are fed into the square-bottom sealing machine, which seals the top and bottom of the bags using heat (with a valve added at the top for cement bag closure). During this process, the bags are automatically perforated to ensure they meet the technical requirements for cement filling. The finished bags are then subjected to a final inspection and pass through a compression machine before being delivered to the customer

Cong Thanh Civil PCB 40 Red Cement Bag