Fabric size calculations, for fabric designers, are the basis for guiding factories to produce products. For the clerk, it is a means of communicating with the guests, quoting, and controlling costs, and mastering this knowledge, regardless of the type of product, in which kind of occasions can calculate the product in the shortest possible time. The basic cost, so that the quotation is accurate, timely, and able to grasp the key to control costs. There are many factors involved in the quantitative calculation of raw materials, of which there are many calculations of the shrinkage of the process is very complicated. For ease of understanding, a reference to a smaller range of values ​​is provided. 1, the quantitative line: None="shifuMouseDownCard(shifu_c_040)" style="margin: 0px; padding: 20px 8px 15px; max-width: 100%; color: rgb(62, 62, 62); font-family: Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif; font-size: 1em; white-space: normal; widows: auto; line-height: 25.6px; width: 670px; text-decoration: inherit; box-sizing: border-box !important; word -wrap: break-word !important; background-color: rgb(255, 255, 255);"> Quantitative per-meter warp (g/m) = warp density per cm × finished web (cm) × (1 + process shrinkage) × (1 + shrinkage) × raw material fineness (D) ÷ 9000 (or 1/N, 0.59/s) 2 , the quantitative weft: None="shifuMouseDownCard(shifu_c_040)" style="margin: 0px; padding: 20px 8px 15px; max-width: 100%; color: rgb(62, 62, 62); font-family: Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif; font-size: 1em; white-space: normal; widows: auto; line-height: 25.6px; width: 670px; text-decoration: inherit; box-sizing: border-box !important; word -wrap: break-word !important; background-color: rgb(255, 255, 255);"> ration per meter of latitude (g/m) = width of finished product (cm) x density of latitude per cm x (1 + latitude Shrinkage ratio × (1 + process shrinkage) × raw material fineness (D) ÷ 9000 The process shrinkage in the above two formulas refers to the shrinkage and shrinkage of raw materials.  (1) One of the shrinkage rates of the process ------- Shrinkage of raw materials :  The yarn (silk) shrinkage of various properties and different processes is as follows: None="shifuMouseDownCard(shifu_c_040)" style="margin: 0px; padding: 20px 8px 15px; max-width: 100%; color: rgb(62, 62, 62); font-family: Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif; font-size: 1em; white-space: normal; widows: auto; line-height: 25.6px; width: 670px; text-decoration: inherit; box-sizing: border-box !important; word -wrap: break-word !important; background-color: rgb(255, 255, 255);"> Mulberry silk soaking process shrinks 1.5% Filament dyeing and bleaching process shrinks by 2.5% Nylon filament natural shrinkage rate of 3% Polyester filament natural shrinkage is 1.5% Elastane polyester filament twisted after high temperature setting shrinkage below 100D is 7% High-temperature stereotyped shrinkage rate of 101D~149D is 8.5% after elastic polyester yarn is twisted Tensile rate of elastic polyester filaments after twisting is more than 150D and 10% Cotton, linen, viscose staple dyeing, bleaching process shrinkage of 2% Viscose filament elongation after 3% by machine pulp (2) The shrinkage rate of the process ------ shrinkage:  After the thread is twisted, it will become shorter. This is because the thread twists from straight to helical, the thread becomes shorter, and the diameter naturally becomes thicker. Therefore, when the length is constant, the denier will correspondingly become thicker, and the denier of different deniers and twists will be different. The rate is also different. The contraction rate can be obtained by formula calculation, or you can refer to the commonly used contraction rate table. Generally, 75D filaments add about 10 centimeters per centimeter, and the shrinkage rate is about 2-3%; 75D filaments add 20 centimeters per centimeter. About 11-12%, the shrinkage rate is about 11-12%; 150D filaments add about 10 centimeters per centimeter, and the shrinkage rate is about 5-6%; 150D filaments add about 20 centimeters per centimeter, and the shrinkage rate is 13- About 15%  (3) Three process shrinkage rates - shrinkage rate:  During weaving, warp of the yarn (filament) is formed during the interweaving of the warp yarns and the weft yarns, so that a one-meter-long warp yarn does not form a one-meter-long cloth after interweaving with the weft yarns. The ratio of the length of the thread to the length of the fabric is the weaving rate, and the size of the weaving rate can also be achieved by formula calculation. The amount of shrinkage is related to the fineness of the yarn, the density of the weft, and the structure of the fabric. The coarser the weft yarn (filament), the greater the weaving shrinkage rate; the greater the fabric weft density, the greater the weaving shrinkage rate; the smaller the number of tissue cycles, the greater the weaving shrinkage rate. General average products (refer to single-layer fabrics, weft density is not particularly thin or particularly dense products) are about 3-8%. (The specific size can be selected from 3 to 8% according to the above-mentioned denier, weft density, and tissue structure). 2 fabric weight calculation The significance of fabric weight calculation is to understand the approximate weight of the fabric, so that the cost and price of the fabric can be calculated. Weight per meter: The gram weight per meter of finished fabric. The calculation method is: Finished product weight per metre (g/m) = (calibration by warp × bending rate + ration of weft × bending rate) ÷ dyeing shrinkage  (1) Smelting rate:  The net weight of the yarn (silk) after dyeing and finishing. Different fibers contain different impurities, and different processes also result in different refining rates for the same material. The commonly used raw material refining rate is as follows: None="shifuMouseDownCard(shifu_c_040)" style="margin: 0px; padding: 20px 8px 15px; max-width: 100%; color: rgb(62, 62, 62); font-family: Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif; font-size: 1em; white-space: normal; widows: auto; line-height: 25.6px; width: 670px; text-decoration: inherit; box-sizing: border-box !important; word -wrap: break-word !important; background-color: rgb(255, 255, 255);"> Silk: 75~80% Raw mulberry silk: 95~98% Silk: 90~95% Silk: 88~93% Viscose, wool: 97% Cotton yarn and hemp: 95% (Silk, bleached 92%) Synthetic fiber: 99% (2) Dye shrinkage:  Dyeing shrinkage refers to the length ratio of the fabric before and after dyeing Dye Finishing and Shrinkage Rate = Blanket Weft Denier Finished Product Weft Density = Finished Product Length ÷ Blanket Length Square silk weight (g/m2) Square silk weight (g/m2) = silk weight per meter (g) web width (meters) 3 Calculation of raw material content For fabrics that are interwoven or blended with two or more materials, the proportion of each material contained therein must be calculated. The calculation method is as follows: A raw material content = (weight of A-containing raw material × ratio of A raw material × refining ratio of A raw material) ÷ ​​(weight of A-containing raw material × refining ratio + weight of B raw material × refining ratio) × 100% Example: The warp of a product is 120N/2 ramie blended yarn (绢70%, hemp 30%), and the weft is 40S/2 rayon cotton yarn Finished width: 140cm plain weave The finished product is dense: 28 yarns/cm Finished product Weft density: 24 shuttles/cm Yarn Weft density 23 shuttles/cm Secondly, considering several factors, we estimated the weaving rate was about 5%, the shrinkage rate of silk reeling process was 2.5%, the latitude contraction rate was about 10%, and the viscose staple fiber process shrinkage was 2.0%. Then: Warp Quantification (g/m) = Finished Finished Product × Finished Width × (1+ Process Shrinkage) × (1 + Shrinkage Ratio) × Raw Material Size ÷ 9000 =28×140×(1+5%)×1/60 = 65 (g/m) Office Organizer,Diy Desk Organizer,Desktop File Organizer,Desktop Organiser Nanjing Intime Import and Export co., Ltd. , https://www.china-intime.com