The grammage of grey fabrics is generally the gram of the fabric weight in square meters. The grammage is an important technical indicator of knitted fabrics. Woollen fabrics usually take grammage as an important technical indicator. The effective width of the fabric is usually expressed in inches or centimeters. The common ones are 36 inches, 44 inches, 56-60 inches, etc., which are called narrow, medium and wide, respectively. Fabrics higher than 60 inches are extra wide. , Usually called wide cloth, the width of ultra-wide fabrics in our country can reach 360 cm, and the width is generally marked after the density.
There are various types of grey fabrics, and there are many classification methods. According to the classification of yarn raw materials, it can be divided into pure textiles, that is, the raw materials of the fabric are all made of the same fiber, such as cotton fabrics, wool fabrics, silk fabrics, polyester fabrics, etc.; blended fabrics, that is, the raw materials that make up the fabric use two or more Different types of fibers are blended into yarns, such as polyester, viscose, polyester, acrylic, polyester and cotton blended fabrics. Mixed fabric, that is, the raw material of the fabric is made of single yarns of two fibers, which are combined into strands. There are low-elastic polyester filaments and medium-length hybrids, and there are polyester staple fibers and low-elastic polyester filaments. The silk is mixed into strands and so on. Interwoven fabrics, that is, the two directional systems constituting the fabric are made of different fiber yarns, such as antique satin interwoven with silk and rayon, and Nifu spinning interwoven with nylon and rayon. According to whether the raw materials of the fabric are dyed or not, grey fabrics can be divided into white fabrics, which refer to fabrics that have not been bleached and dyed, and are also called raw fabrics in silk weaving. Colored fabrics are fabrics made from bleached and dyed raw materials or fancy threads. Silk weaving is also known as cooked fabrics.
According to the processing method, it can be divided into the following categories. Woven (shuttle) fabrics are fabrics that are interwoven on the loom according to a certain rule of yarns that are arranged perpendicular to each other, that is, the horizontal and vertical systems. There are denim, brocade, board, linen and so on. Knitted fabric, a fabric formed by knitting yarns into loops, is divided into weft knitting and warp knitting. Weft-knitted fabrics are made by feeding the weft into the working needles of the knitting machine from the weft direction, so that the yarns are sequentially bent into loops, and then threaded into each other. Warp knitted fabric is made by using one or several groups of yarns arranged in parallel, which are fed to all working needles of the knitting machine in the warp direction, and are formed into loops at the same time. Nonwovens are made by bonding or stitching loose fibers. At present, two methods of bonding and puncture are mainly used. Using this processing method can greatly simplify the process, reduce the cost of the textile and garment industry, improve labor productivity, and have a broad development prospect. Knitted (woven) fabrics of two or more than two sets of threads, which are mutually misaligned, stuck in position, or cross-knitted products, such as mats, baskets and other bamboo and rattan products; or one or more yarns mutually Knitting products of stringing, twisting and knotting. The other type is a complex product with a three-dimensional structure formed by special equipment and multi-path yarn feeding according to a certain spatial interlacing and stringing law. Composite fabric, formed by two or more of woven fabrics, knitted fabrics, knitted fabrics, non-woven fabrics or membrane materials through cross-knitting, needle punching, spunlacing, bonding, stitching, riveting, etc. Layer fabric.
In addition, it is worth mentioning that the stacking method of grey cloth is more exquisite. First, there must be a large and spacious warehouse, and then differentiate according to the type of fabric. For example, knitted fabrics and woven fabrics should be distinguished, because knitted fabrics are softer in rolls, while woven fabrics are rolled up. It is relatively straight, and there is a classification of fabric materials. The cotton fabric is separated, and the polyester-cotton fabric and fiber fabric are divided into three parts.