The AH Salt after being dosed, in specified quantity enters the dissolving bath and is transformed to the solution with 60% concentration. Then it is stored in storage tank and subsequently after mixed with different additives enters the Separator to become a 90% concentrated solution gets in to the autoclaves. After completion of the polymerization stage, the melted polymer exit autoclaves and by going through cooling water, is changed to solid fibers and finally after cutting with cutter PA66 Chips are produced. Since the relative viscosity of the chips resulting from the afore said stage are lower than the required specification , they enter the intermediate tank and then are directed in to SSP(Solid State Poly Condensation) system and after cooling by nitrogen , the high viscosity chips are obtained and same dispatched to Spinning Plant.

At the spinning station, the chips are melted in extruders and then by shaping in spinneret they become very delicate fibers called filament, the number of which depend on the programmed yarn titer. Filaments become solid under cool air below and after joining together and absorbing spin oil are drawn to get the desired strength and are wound around bobbins up to the intended weight. The product of this plant is called yarn which depending on the type of the used chips is identified as yarn 66 or 6. Also, depending on the strength (tenacity) of the produced yarn it is classified in 2 grades, i.e. Basic Tire Yarn (BTY) and Fish Net Yarn (FNY) which both groups may be produced in several deniers.

At twisting stage, two tire grade yarns (BTY) are twisted to make 2-ply cord with the required physical properties according to the customer specifications both in nylon 6 and 66 types.

After being conditioned at 60% humidity and 21 c temperature (conditioning time depends on the nylon type) the number of cords which is designated as per the customer order , are placed on the creels (weaving machine) and weaving operation with warp-weft method is performed to attain the product of this stage , i.e. Griege Fabric .

At dipping stage, the griege fabric is dipped with RFL solution and within programmed heating times. The necessary chemical links are made between the fabric and the solution in such a way that the latter is stuck to the fabric from one hand and becomes capable of firmly adhering to rubber from other hand. During the process, the required tension is applied to the fabric and at final stage after passing through the relaxation zone; dipped fabric is wound around the cylindrical shells according to the relevant user specification.



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