How to Calculate Warp and Weft Yarn Required for a Standard 100m of Fabric
Here is one Query:
"I run a small business of supplying 100% cotton fabric to exporters . As you are aware the cotton yarn prices are on the rise on a daily basis, and the rates that I get from vendors is totally disproportionate to the rise in price. In this regard I request you to kindly teach me a formula to calculate the wrap and weft yarn required for a standard 100 meters of fabric in required widths of 47" and 60". Please suggest the formula in cotton counts."
We need a few things to start Calculating the weight
I am assuming the following ( If you don’t understand, please don’t bother about this, you will be able to calculate the weight of the yarn with certain accuracy) :
1.Warp Crimp 10%
2.Weft Crimp 3%
Weight of one meter of Fabric in Grams =((Ends per Inch x Width in Inch x 1.10)/(Warp Count x 840) + (Picks per Inch x Width in Inch x 1.03)/(Weft Count x 840)) x (1.09x 1000/2.2)
Take Ends/Inch and Multiply by Width in inches and 1.10. Divide this quantity by Warp count multiplied by 840. This will give you weight of Warp in pounds of one yard (a). To find the weight of the warp in one meter of fabric in grams multiply (a) by 1.09 and 1000 and divide by 2.2.
Take Picks per inch Multiply by width in inches and 1.03. Divide this quantity by Weft Count multiplied by 840. This will give you Weight of weft in one yard of fabric (b).To find the weight of the weft in one meter of fabric in grams multiply (b) by 1.09 and 1000 and divide by 2.2
Now Add (a) and (b) to get the total weight of warp and weft in one yard of fabric. Let us say this value is (c). Now Multiply (c) by 1.09 and 1000 and divide it by 2.2 to get the weight of one meter of fabric in grams. Multiply it by 100 to get the weight of 100 meters of fabric in Grams.
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Fabric weight is the outcome of how a fabric has been woven, its finish and sometimes the fibre type. Looking at the weight can help you to decide if it will be the most suitable fabric for its end use.
Example – suppose the fabric width is 60” and the fabric gsm is 197 then let's find out the oz/yard. Fabric gsm divided into inches of 1-meter fabric and then multiplied to inches to one yard. I hope you are now clear about the gsm and oz/yd.
The weight of the fabric is measured in ounces per yard or meter: approximately 2-4oz for lightweight, 4-8oz for middleweight and 8-14oz for heavy weight.
To find the density, divide the basis weight by the ream's uncut size in inches. For example, if 500 sheets weigh 20 pounds and have an uncut size of 39 inches by 54 inches, then the density would be 0.5 pounds per square inch (20 divided by 39). To calculate GSM, multiply the density by 1,000.
9 OUNCES. A 9 ounce/yard fabric is often called a “year-round” or "4-season" cloth. For this reason it's the most popular choice for guys who need a "workhorse" or "go-to" suit they can rely on na matter the season. Our essential worsted fabric range is a great example.
A denser and thicker fabric, which can offer superior durability, drape, and insulation, is typically indicated by a higher GSM. Although GSM alone cannot assess a textile's quality, it is frequently employed as a criterion, with higher GSM materials typically being linked with higher quality.
Sometimes in the US, you'll see fabric weights listed as just ounces (for example, a 10-ounce French terry or a 6-ounce cotton shirting). It can be assumed that this is the weight of the fabric per square yard.
Fabric thickness is determined by various factors, including yarn diameter, the degree of compression between interlaced threads and the presence of float sections within the weave repeat [54] . ...
GSM stands for grams per square metre, which refers to the weight of a fabric. In general, the higher a fabric's GSM, the thicker and more hard-wearing it's likely to be.
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