Woven bag making process

The production process of woven bags mainly includes the following steps:

(1) Wire drawing: This step is to draw the heated and melted polypropylene into filaments. The specific width of the filaments is determined by the density of the woven bag required by the customer, usually between 10 and 15 filaments. This step seems simple, but in fact requires workers to have skilled skills.

(2) Weaving: Weaving is to weave the filaments obtained after drawing into a cloth by means of staggered warp and weft. This step is generally accomplished by a circular loom. Before entering the circular loom, the warp yarn will pass through the brown frame for cross-opening treatment, and the weft shuttle will pass through the warp yarn in a circular motion in the cross-opening and weave into a barrel cloth. The number of shuttles in a circular loom determines the number of warp yarns entering the circular loom. The process indicators involved in this process include weaving density, width, tensile strength and weight per unit area of woven cloth.

(3) Bag making: The woven cloth is then printed, cut, sewn and other processes to become a woven bag. Depending on the equipment used, the order of these processes can be adjusted, for example, it can be cut first and then printed, or printed first and then cut. In addition, according to the specific use of the woven bag, other treatments may be performed, such as punching, folding, welding, etc., to make different types of woven bags, such as cement bags, tarpaulins, geotextiles, etc.

Woven bag production process need to pay attention to the following matters:

(1) Material selection: According to the use, weight and use environment of the woven bag, choose the appropriate plastic raw materials, such as polypropylene (PP) or polyethylene (PE). If you need waterproof function, you can choose woven bag material with polyethylene coating.

(2) Material handling: When handling woven bag materials, you must pay attention to the cleaning and disinfection of the materials. In order to prevent dust, oil stains or other harmful substances from adhering to the surface of the material and affecting the hygiene and safety of the woven bag, neutral detergent and clean water should be used for cleaning, and food-grade disinfectant can be sprayed if necessary.

(3) Use of additives: According to specific needs, you can consider adding appropriate additives to the material, such as ultraviolet absorbers, antioxidants, antistatic agents, etc., to improve the performance and stability of the woven bag. However, the selection and use of additives should follow relevant laws and standards.

(4) Weaving skills: master basic weaving skills, such as single hook weaving, double hook weaving, etc., and keep the hook method consistent and uniform strength to ensure the quality of woven items. Beginners can start practicing with simple knitting items, gradually improving their knitting skills.

(5) Detail processing: In the process of making woven bags, pay attention to detail processing. For example, reinforcing the bottom of the woven bag can increase the load-bearing capacity; adding zippers or buttons to the mouth of the woven bag can improve practicality.

(6) Environmental protection and cost: Consider environmental protection issues and give priority to degradable materials. At the same time, it is necessary to control costs, improve production efficiency and reduce production costs.

(7) Quality inspection: Regularly inspect the quality of woven bags, find problems in time and solve them to ensure that the quality of woven bags meets the requirements.

Through the above introduction, we understand the whole production process of woven bags from raw material preparation to finished products. In this process, each process is very important, which directly affects the quality and performance of woven bags. Therefore, manufacturers should strictly control every link in the production process to ensure product quality. At the same time, when we buy woven bags, we should also pay attention to choosing products from regular manufacturers to ensure the safety and reliability of packaging.