Basic knowledge: The difference between knitted fabrics and woven fabrics

Knitted fabrics and woven fabrics have their own unique characteristics due to their different methods in weaving, their processing technology, fabric structure, fabric characteristics, and finished product use.

(a) The composition of the fabric organization:

(A) Knitted fabrics: the yarns are sequentially bent into coils, and the coils are interspersed with each other to form a fabric, and the process of forming the coils by the yarns can be performed horizontally or longitudinally. The lateral weaving is called weft-knitting, and the longitudinal weaving. Called warp knitwear.

(B) Woven fabric: It is composed of two or more sets of mutually perpendicular yarns, which are interlaced with warp and weft at an angle of 90 degrees. Longitudinal yarns are called warp yarns, and transverse yarns are weft yarns.

(b) Basic units of fabric organization:

(A) Knitted fabric: The coil is the smallest basic unit of the knitted fabric, and the coil is composed of a space curve and a spatial curve.

(B) Woven Fabric: Each intersection between the warp and the weft is called a tissue point and is the smallest basic unit of the woven fabric.

(c) Fabric organization characteristics:

(A) Knitted fabrics: Since the loops are formed by bending the yarns in space, each loop consists of one yarn. When the knitted fabric is subjected to external tension, such as stretching in the longitudinal direction, the bending of the loop changes, and the loop The height of the coil is also increased, while the width of the coil is reduced. If the tension is a horizontal stretching, the coil height and width can obviously be converted to each other under different tension conditions. Therefore, the stretchability of the knitted fabric is large.

(B) Woven fabrics: Since warp yarns are intertwined with weft yarns with some bending, and the crooks are bent in a direction perpendicular to the plane of the fabric, the degree of bending thereof is related to the mutual tension between the warp and weft yarns, and the stiffness of the yarn, when the woven fabric is subjected to External tension, such as stretching in the longitudinal direction, increases the tension of the warp yarn and decreases the bending, and the bending of the weft yarn increases, such as the longitudinal stretching, until the warp yarn is completely straightened, and the fabric shrinks laterally. When the woven fabric is stretched laterally by external tension, the tension of the weft yarn increases, bending decreases, and warp yarn bending increases, such as horizontal stretching, until the weft yarn is completely straightened, and the fabric is longitudinally contracted. In the warp, weft yarns do not change, unlike knitted fabrics.

(d) The characteristics of the fabric organization:

(A) Knitted fabrics: They can stretch in all directions and have good elasticity. Because the knitted fabrics are formed by hole-shaped loops, they have a large air permeability and feel soft.

(B) Woven fabric: Because of the shuttle fabric weft, extension and contraction of the weft yarn does not change greatly, and no change occurs. Therefore, the fabric is generally relatively compact and stiff.

(e) Physical and mechanical properties of fabrics:

(A) Knitted fabrics: physical and mechanical properties of fabrics, including longitudinal, crosswise, square meters, elongation, elasticity, breaking strength, abrasion resistance, curling, thickness, dispersibility, shrinkage, coverage Sex, bulk density.

(B) Woven fabrics: The physics and mechanics of woven fabrics, including the yarn densities of warp and weft yarns, cloth edges, front and back sides, reverse and reverse hair direction, and fabric coverage.