In the processing and printing process of nonwoven fabric, in order to reduce its printing process and improve the printing quality, simplifying the printing process is an important way to reduce the manufacturing cost of the product. This article introduces the printing process of nonwoven fabric in detail, let's learn about the printing process of nonwoven fabric.
Nonwoven printing process can be mainly used online dyeing and offline dyeing.
1, non-woven online dyeing process flow: loose fiber open clear carding spunlace foam dyeing (adhesives, coatings and other additives) drying winding. Among them, foam dyeing has the advantage of energy saving, but also has the disadvantage of uneven dyeing.
2, nonwoven offline dyeing process: spunlace nonwoven fabric feeding cloth dipping and rolling (adhesives, coatings and other additives) pre-drying stenter drying or roller drying winding.
Nonwoven printing process in the case of printing, color paste made of paint, adhesives, corresponding additives and water need to add thickeners to increase viscosity, and color paste printed on nonwoven fabrics by roller printing machine, and adhesives in the drying process since the cross-linking to fix the color paste on the product.
Taking the nonwoven production line as an example, the inline printing process is loose fiber open clear cotton carding spunlace impregnation printing drying winding. Among them, the impregnation process can use dip-rolling or foam impregnation, some factories do not have this process, mainly according to the customer's requirements for product quality and application areas to decide.
Printing process mainly adopts roller printing method. Circular screen printing is not suitable for nonwoven printing because it tends to clog the mesh holes. A few decorative nonwovens use transfer printing method, but this method has high printing cost and certain requirements for its surface and fiber raw materials.
The printing and dyeing process is short, efficient and low cost, which can fully meet the requirements of relevant application fields. In addition, the method is simple and easy to use, applicable to all kinds of fibers, low energy consumption, and good for environmental protection. Therefore, except for some special products, most nonwoven factories use the coating dyeing and printing method.
The quality of raw material of nonwoven fabric has an important influence on its quality therefore, the quality of raw material should be strictly controlled in the production and processing of dimple to avoid using poor quality raw material in the processing.
Nonwoven fabric is made of polypropylene (pp) granules, which are melted, spun, webbed, hot pressed and wound at high temperature. The three main fibers used are polypropylene (62%), polyester (24%) and viscose fibers (8%). From 1970 to 1985, viscose fibers were widely used on this. However, in the last five years, the application of polypropylene and polyester fibers began to dominate in the field of hygienic absorbent materials and medical textiles.
There are many materials for nonwovens, which are distinguished mainly according to their use. Here I will briefly explain that the materials are polyester, aramid, acrylic, nylon, composite, ES, 6080, vinyls, spandex, etc. All are fibers. The different materials and processes of their production vary greatly in terms of sales price.
The quality of raw materials has a great influence on its processing quality, so it is important to choose reliable raw materials when processing. If a large amount of poor quality raw materials are used in the process, it will seriously affect its quality and cause huge losses to the enterprise.
To sum up, the printing process of nonwovens includes many complex technologies. Printing is a very important step in the process of processing semi-finished products into finished products. A simplified printing process for nonwovens can not only improve the printing quality of nonwovens, but also the tensile strength of nonwovens.