Fabric Raw Material Costs
Warp Raw Material Cost Calculation = Warp Density x Width x Warp Yarn (D) / 9000 x (1 + Weaving Shrinkage and Process Shrinkage Rate) x (1 + Raw Material Loss Rate) x Raw Material Unit Price
Weft Raw Material Cost Calculation = Weft Density x Width x Weft Yarn (D) / 9000 x (1 + Weaving Shrinkage and Process Shrinkage Rate) x (1 + Raw Material Loss Rate) x Raw Material Unit Price
If the warp yarns use long fibers (D), the calculation can be done as above. If the weft yarns use short fibers (S), then first unify the units.
D = 5315/S
There are two types of raw materials for the weft yarns. You need to know the arrangement of the two raw materials. Then calculate the yarn usage for each raw material according to the ratio.
For example, if the weft yarn arrangement is A5B3A6B4, then when calculating the weft yarn for weft A, the weft density is calculated as the grey fabric weft density x 11/18. Other... Calculate using the above formula:
When calculating the weft density of B-weft raw materials, use the greige fabric weft density x 7/18. For other materials, calculate using the above formula. Weaving shrinkage and process shrinkage rates are calculated as follows: 5%~30% for chemical fibers and 8~12% for all-cotton. This coefficient is directly proportional to the increase in weft density and twist of the fabric, and inversely proportional to the increase in warp float length. Raw material loss is calculated as follows: 4%~5% for uniform warp and weft, and 6~8% for incompatible warp and weft.
Next, calculate the total cost of the greige fabric: (warp + weft) raw material cost + weaving costs. Weaving costs are mostly determined by the greige fabric weft density, with water jet machines at 4~8 points/weft. This is related to the geographical location of the weaving mill and the processing difficulty of the product.
Finished fabric cost = greige fabric cost x dyeing shrinkage rate + dyeing costs + freight, packaging, and other miscellaneous costs.
Note: Density refers to the number of threads per centimeter.
