1,In fabric analysis, the primary tools employed consist of: a cloth mirror, a magnifying glass, an analytical needle, a ruler, graph paper, among others.
2,To analyze the fabric structure,
a. Determine the fabric's process front and back, as well as the weave direction; generally, woven fabrics can be woven in reverse.knitting direction dispersion:
b.Mark a line on a particular loop row of the fabric with a pen, then draw a straight line every 10 or 20 rows vertically as a reference for disassembling the fabric in order to create weaving diagrams or patterns;
c. Cut the fabric so that the transverse cuts align with the marked loops in a horizontal row; for vertical cuts, leave a distance of 5-10 mm from the vertical markings.
d. Disentangle the strands from the side marked with a vertical line, observing the cross-section of each row and the weaving pattern of every strand in each column. Record the completed loops, looped ends, and floating lines according to the specified symbols on graph paper or woven diagrams, ensuring that the number of rows and columns recorded corresponds to a complete weave structure. When weaving fabrics with different-colored yarns or yarns made of different materials, it is crucial to pay attention to the compatibility between the yarns and the fabric's weave structure.
3,To establish the process
In fabric analysis, if a pattern is drawn on a single-sided fabric for weaving or knitting, and if it's a double-sided fabric, a knitting diagram is drawn. Then, the number of needles (flower width) is determined by the number of complete loops in a vertical row, based on the weave pattern. Similarly, the number of weft threads (flower height) is determined by the number of horizontal rows. Subsequently, through analysis of patterns or weaving diagrams, the knitting sequence and trapezoidal diagrams are devised, followed by the determination of yarn configuration.
4,The analysis of raw materials
Primary analysis involves assessing the composition of yarns, fabric types, yarn density, coloration, and loop length, among other factors. A. Analyzing the category of yarns, such as long filaments, transformed filaments, and short-fiber yarns.
Analyze the composition of the yarn, identify the fiber types, determine whether the fabric is pure cotton, a blend, or a weave, and if it contains chemical fibers, ascertain whether they are light or dark, and determine their cross-sectional shape. To test the thread density of the yarn, either comparative measurement or weighing method can be employed.
Color scheme. By comparing the removed threads with the color card, determine the color of the dyed thread and record it. Furthermore, measure the length of the coil. When analyzing textiles that consist of basic or simple figured weaves, it is necessary to determine the length of the loops. For intricate fabrics such as jacquard, it is required to measure the lengths of different-colored threads or fibers within a single complete weave. The fundamental method for determining the length of a coil is as follows: extract yarns from the actual fabric, measure the length of a 100-pitch coil, determine the lengths of 5-10 strands of yarn, and calculate the arithmetic mean of the coil lengths. When measuring, a certain load (usually 20% to 30% of the yarn's elongation under breakage) should be added to the thread to ensure that the loops remaining on the thread are basically straightened.
Measuring the coil length. When analyzing fabrics that consist of basic or simple patterns, it is necessary to determine the length of the loops. For intricate weaves such as embroidery, it is required to measure the lengths of different-colored threads or yarns within a single complete pattern. The basic method for determining the length of a coil involves extracting yarns from the actual fabric, measuring the length of a 100-pitch coil, and calculating the arithmetic mean of 5-10 yarns to obtain the coil's length. When measuring, a certain load (typically 20-30% of the yarn's elongation at break) should be added to the thread line to ensure that the remaining loops remain essentially straightened.
5,Establishing final product specifications
The finished product specifications include width, grammage, cross-density, and longitudinal density. By means of the finished product specifications, one can determine the drum diameter and machine number for weaving equipment.
Post time: Jun-27-2024