In the weaving part, there are mainly three main methods for fabric production, which are: 1- Tari and weft weaving 2- Tari circular knitting 3- Weft ring weaving In this design, warp and weft weaving with a spinning machine is proposed. Production bags with the ring method are desirable for packing and transporting materials that have coarser grain size. Depending on the type of sack used, you should choose one of two methods for production.

"Cutting and sewing"

At this stage, roll the sack at the beginning of the cutting line. It is placed and cut according to the requested length by a thermal blade. The process of sewing the bottom of the sack is folded to the desired size and crocheted using a special sewing machine. "Packaging" Packing of sacks After counting 500 by hand or baling press, it is packed and marketed. In the weaving part, there are mainly three main methods for fabric production, which are: warp and weft knitting, warp and weft ring knitting, non-woven fabric production methods. For the production of polypropylene bags, so far, the non-woven method is created by creating layers and capturing fibers. come It has not been effectively used, but the method of circular weaving, tari and podi is used now. The bags produced by the two methods have different specifications and cannot be replaced. In this design, warp and weft weaving is proposed with round knitting machines, which constitutes the major part of domestic production and consumption. Ring production bags are desirable for packing and transporting materials with coarser grain size. Depending on the type of bag use. You should choose one of two methods for production. Circular knitting machines are divided into large or small diameter machines according to the size of the circumference, depending on the type of bag use, the desired machine diameter should be selected. In addition to that, the wefting speed of the machine, the number of makos and the entry of the machine and the wefting system should be taken into consideration in choosing the machine. In the spinning part, the film of lead extruders is usually made in two ways: blowing or flat, the flat system has better quality and this method is used in this design. Another difference in the spinning part is the method of cooling the film, which is usually done in two ways. Either by hot water or by a roller through which cold water passes, in the first method, the yarn is stronger because the cooling time is fast and the formation of crystals is prevented, and the optimal method is the hot water tub method. Is. Another difference in spinning machines is the yarn stretching part, which is done by hot air when the yarn passes through the hot plate, and the yarn stretching using hot air increases the quality of the yarn due to the lack of friction on the metal surface.

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