How do you calculate Spirality?
Follow the below steps to measure fabric spirality.
- Cut a fabric specimen in rectangle shape of 20” X 10” dimension.
- Fold the fabric and join two ends by over edge stitch.
- Mark a square (8” X 8”) with fabric marker on one side of the folded and stitched fabric.
- Wash the specimen in washing machine and tumble dry.
What is the Spirality?
: the quality or state of being spiral : the amount or degree of spiral curve.
What is Spirality in garments?
Course spirality is a very common inherent problem in plain knitted fabrics. Some of the practical problems arising out of the loop spirality in knitted garments are: displacement or shifting of seams, mismatched patterns and sewing difficulties.
What is Spirality in woven fabric?
Spirality is a dimensional distortion in circular plain knitted fabrics. The lengthwise rows of stitches, called wales or needle lines, should occupy a truly vertical line in the fabric and should always be at right angles to the cross wise courses of stitches.
What is Spirality in knitted fabric?
Spirality can also be termed as fabric skew or fabric torque. Spirality is the problem which occurs when the wale is not perpendicular to the course direction. As the yarn is bent to form a loop, the outer part extends and inner part compresses.
What is shrinkage and Spirality?
Spirality is a dimensional distortion in circular knitted fabrics and has an obvious influence on the aesthetic and functional performance. Shrinkage is the process in which a fabric becomes smaller than its original size while washing and drying.
What is twisting in garments?
Twisting, in yarn and rope production, process that binds fibres or yarns together in a continuous strand, accomplished in spinning or playing operations. The number of turns per unit of length in a yarn affects the appearance and durability of fabric made from that yarn.
In which instrument Spirality of fabric are determined?
With the IWS method, the spirality is determined by placing a protractor on the fat smooth fabric surface with its base-line along the course and reading the angle between the wale line and a line 90°perpendicular to the course line .
How do you control Spirality in knitting fabric?
Spirality can be virtually eliminated by using 50/50 cotton/polyesters blend of air jet and rotor yarns. Fabric stitch length: This is the length of one loop in knitted fabric. Spirality increases with the length of loop.
What is doubling and twisting?
The method of twisting two or more single yarns is called doubling or folding or ply twisting. Such yarns are designated as doubled yarn, folded yarn or plied yarn and the machines intended for the purpose are called doublers, ply-twisters or two-for-one (TFO) twisters.
How is SLA calculated in BPO?
- The most common formula used by the call center industry to calculate Service Level is:
- Number of calls answered within time period/ total number of call answered X 100%
- This is based on the objective of X% of calls answered with Y seconds.
How can you measure the Spirality of fabric?
There are two ways you can measure the spirality of a fabric. One, make a garment sample (half sleeve T-shirt) and measure twisting percentage of garment side seam. In the right side image a garment sample is shown before wash and after wash.
What is the difference between spirality and shrinkage?
Shrinkage: A dimensional change resulting in a decrease in the length or width of specimen subjected to specified condition is known shrinkage. Spirality: If the Wales of the knitted fabric are not perpendicular to the course and skew to the right or left Spirality occurs in the fabric.
What is the Spirality tester and test method?
Spirality Tester and Test Method. Fabric Spirality tester is a equipment for dimensional distortion in circular plain knitted fabrics. This In House Test Method describes the method of test in order to determine the spirality test method which occurs in a material resulting from laundering procedures.
How is Spirality measured in a course line?
Place the protractor along a course line ensuring wale intersects with the bottom of the 90 line on the protractor (Figure 4). The angle between the 90 line and wale line is measured and the direction of spirality (+ right, – left) is recorded.