1, different knitting principles:

The knitting principle of warp knitting is to arrange one or several groups of parallel yarns on the knitting needles respectively and knit in loops in the longitudinal direction (warp direction) at the same time.

The knitting principle of weft knitting is to feed one or several yarns into the working needle of the knitting machine from the transverse direction (weft direction), so that the yarns are bent into loops in turn and nested in series.

2. Use different yarns: Weft knitted fabrics can be formed with at least one yarn, but in order to improve production efficiency, multiple yarns are generally used for knitting; Warp-knitted fabrics cannot be formed by one yarn, and one yarn can only form a chain consisting of one loop.

All weft-knitted fabrics can be broken into threads against the weaving direction, while warp-knitted fabrics cannot. Warp-knitted fabrics cannot be woven by hand.

3. The extensibility of fabrics is different: the extensibility of warp knitting is limited, usually slightly in the horizontal direction and almost not in the vertical direction. Weft-knitted fabrics have good extensibility in both longitudinal and transverse directions.

4. The machines used are different: the weft-knitted fabrics are woven by loops on the big circular knitting machine, and the warp-knitted fabrics are woven by the flat knitting machine.

5. Different production capacity: warp knitting can only produce a certain batch, while weft knitting can produce in small batches (even 1 kg).

Extended data:

Common identification methods of warp knitted fabric and weft knitted fabric;

1, laying samples by hand, observing the knitting direction of the yarn to judge whether it is a warp knitted fabric or a weft knitted fabric, and the extension line of the warp knitted fabric is zigzag along the longitudinal direction; The extension line of weft knitting is a line along the transverse direction. The yarn direction of the weave structure under the reference microscope. Usually, the grain direction of the front and back of weft knitted fabric is the same, and the warp knitted fabric is vertical. )

2. If the sample has a full width, generally speaking, it is a warp knitted fabric with selvage and neat selvage, not necessarily a weft knitted fabric without selvage, and warp knitting sometimes has burrs.

3. Trim the sample slightly along the fabric texture, and then try to tear the four edges of the sample in turn. One side of the weft knitting will fall off and the whole yarn will be pulled out. Warp knitting will not fall off.

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