Basic knowledge of non-woven fabric industry (a must-see for novices)

The calculation method of the width of non-woven fabric: The width of the non-woven fabric roll is called the width, and the standard unit of the width of the non-woven fabric is cm. At present, the domestic machine standard has three models: 160cm, 240cm and 320cm. Because the domestic machines are mostly 160cm and are convenient for transportation. The width of most non-woven fabric rolls is less than three meters, while the width of some needle punching machines can reach eight to nine meters. Calculation method of non-woven fabric weight: In the calculation of non-woven fabric weight and weight, 4 units are commonly used, one is yard, English yard, abbreviated as Y; second is meter, English meter, abbreviated as m, and third is gram , English gram, referred to as gram, four is millimeter, referred to as mm. The unit of thickness of non-woven fabric. The number of grams is used to calculate the thickness, and the gram refers to the square gram weight, that is, g/㎡, why not use millimeters? In fact, millimeters are also useful, but they are used less. This is an industry rule. In fact, the square weight can be equivalent to the millimeter in thickness, because the weight of non-woven fabric is between 10g/㎡~320g/㎡. What is non-woven fabric? Non-woven fabrics are also called non-woven fabrics. Simply put, they are made without weaving, knitting, yarns, fibers or slices, and consolidation of different fibers. Application of non-woven fabricsMedical curtains, surgical gowns, surgical drapes, medical dressing materials, wound dressings, medical gauze, aviation wipes, clothing lining base fabrics, coated base fabrics, disposable materials, advanced instrumentation wipes, electronics industry High-quality wipes, towels, cotton pads, wet wipes, mask covering materials, etc. Characteristics of non-woven fabrics Non-woven fabrics are generally wear-resistant, water-absorbent, anti-static, biodegradable, breathable, conductive, dry-cleanable, durable, elastic, soft, porous, Smooth, stable, sterilizable, strong, waterproof, hydrophilic, weldable, bondable, thermoplastic, skin-friendly, anti-static, ultra-thin, breathable, printable, anti-mite, flame-retardant and other characteristics. (Note: Not every kind of non-woven fabric has the characteristics. Instead, you can choose different raw materials, manufacturing processes and post-treatments, such as printing, embossing, molding and compounding, according to specific needs or problems.) The production process of non-woven fabrics: 1. Preparation before web formation: (fiber-open cotton blended carding) 2. Laying 3. Reinforcement 4. Post-treatment (including hydrophilic, water repellent, anti-static, flame retardant, conductive, Classification of embossing, printing, dyeing, laminating, slitting, etc.) non-woven fabrics 1. Dry method [including chemical bonding, thermal bonding (including hot rolling and hot air), needle punching, spunlacing, airlaid] 2. . Wet method III. The development prospects of spunmelt (including spunbond and meltblown) nonwoven fabrics. In recent years, China’s nonwoven fabric industry has developed rapidly and its production and sales have achieved rapid growth, but some problems have also appeared in the development process. Problems such as low mechanization rate and slow industrialization process are caused by many factors. In addition to management system and marketing factors, weak technical force and lack of basic research are a major obstacle. Although rich production experience has been accumulated in recent years, it has not yet been theorized and it is difficult to guide mechanized production. The start of various infrastructure projects in China continues to increase. These projects require a large amount of geotextiles, filter materials, waterproof materials, and packaging materials, and their consumption-pull role is obvious. In addition, the increase in domestic consumer income will also force the consumption of various hygienic absorbent products and air filtration materials, medical and sanitary products, and labor insurance, sports and sports products. Therefore, China's non-woven fabric industry still has great growth potential in the future.