FIBC Bulk bags production quality control experience sharing

As a twenty-year practitioner of the FIBC Bulk bags industry, I always think that the quality of the FIBC Bulk bags is not only related to the credibility of the enterprise, but also has a direct impact on the customer’s logistics safety. Today will be from the raw material selection to the finished product out of the whole process, analysis of how to build a refined quality control system.

First, the FIBC Bulk bags raw material control: the starting point of quality
Raw material procurement is the first lifeline. We strictly screen the new polypropylene particles with melt index of 2.5-3.5g/10min, and do the ash test for each batch to ensure that the impurity content is less than 0.03%. We use colorimeter imported from Germany to test the color difference of raw materials to avoid color difference between batches. Warehousing links to implement the principle of first-in-first-out, regular sampling of raw materials melt index and tensile strength, to ensure that the performance of raw materials is stable.

Second, the FIBC Bulk bags drawing process: the key to fiber strength
Drawing temperature control accuracy needs to reach ± 1 ℃, we use PID intelligent temperature control system, with online diameter meter real-time monitoring of monofilament diameter. By adjusting the draw times (usually controlled at 5.5-6.5 times), the breaking strength of monofilament is stabilized at above 4.2cN/dtex. Each drawing machine is equipped with an automatic inspection robot that records tension data every hour to ensure fiber uniformity.

Third, the FIBC Bulk bags weaving process: the guarantee of structural strength
Adopting high-speed circular knitting machine controlled by electronic cam, the error of warp and weft density is controlled at ±0.5 roots/10cm. intelligent deviation correction system is developed to correct the warp tension in real time to avoid folds on the cloth surface. Each roll of woven fabric is inspected for light transmission to ensure that there are no defects such as broken threads and skipped yarns. The key positions are equipped with industrial endoscopes for microscopic inspection of the state of knitting needles.

Fourth, the FIBC Bulk bags coating process: the core of moisture-proof performance
Adopting three-layer co-extrusion casting technology, PE film thickness control accuracy of ±2μm, online monitoring through infrared thickness gauge to ensure film uniformity. Designed gradient cooling system to make the crystallinity of the film layer reach over 65%. Peeling strength test is carried out every shift to ensure the composite fastness ≥3N/15mm.

V. FIBC Bulk bags cutting and sewing: guarantee of size precision
The introduction of CNC cutting center, positioning accuracy of ± 1mm, sewing process using servo-driven sewing machines, stitch length control between 3.5-4.0mm. The key part (sling joint) adopts double-channel overlocking process, and the sewing strength is verified by tensile testing machine. Developing AI visual inspection system to automatically identify problems such as needle leakage and thread breakage.

Sixth, the finished FIBC Bulk bags inspection: the last line of defense before leaving the factory.
Establish a three-tier inspection system: first piece inspection, process inspection, full inspection into the warehouse. Use electronic tensile testing machine to test the breaking strength of the sling (≥5000N), through the falling dart impact test to verify the impact resistance. Three pieces are randomly selected from each batch for stacking test, simulating a 4-story storage environment. Blockchain traceability system is introduced to realize full traceability from raw materials to finished products.

Twenty years of practice has made me deeply realize that quality control is not the strengthening of certain links, but the fine management of the whole process. We continue to invest in intelligent equipment and digital systems, realize real-time monitoring of production data through IoT technology, and optimize process parameters with big data analysis. In the future, we will continue to explore the application of new composite materials to provide customers with safer and more environmentally friendly FIBC Bulk bags solutions. Today we share with you here, welcome to visit our FIBC Bulk bags factory, come to China to travel to taste Chinese food.