How to increase the thickness of hot air non-woven fabric? Research and experiment results on the increase of the thickness of hot-air nonwovens

Hot-air non-woven fabric is a kind of dry heat-bonded non-woven fabric, which is formed by using hot air on drying equipment to penetrate the fiber web after the fibers are carded into a web, so that it is heated and bonded. Hot air non-woven products have the characteristics of high bulkiness, soft feel, good dryness, and good air permeability. It is a thin product made with composite fibers. The gap between the fibers is large. When used, the liquid can quickly penetrate through the fiber gap to absorb Therefore, it is widely used in disposable products, such as baby diapers, adult incontinence pads, feminine hygiene products, and napkins, bath towels, disposable tablecloths, etc.; thick products are used to make cold-proof clothing, bedding, baby sleeping bags, Mattresses, sofa cushions, etc. High-density hot air non-woven products can be used to make filter materials, sound insulation materials, shock absorption materials, etc. Compared with spunbonded non-woven fabrics and hot-rolled non-woven fabrics, hot-air non-woven fabrics are thicker, and it is more difficult for liquid to penetrate back to the surface after passing through the surface material. Therefore, the use of hot-air non-woven fabrics as the surface layer of sanitary products will be more Dry and comfortable. The application of hot-air non-woven fabrics to the surface layer of sanitary products has been led by the Japanese and Korean markets in the past two years. Because of its excellent performance, the scale of hot-air non-woven fabrics is rapidly expanding. The research is also going deeper. The increase in thickness studied in this article is one of the most researched contents by many manufacturers. With the continuous expansion of the domestic personal hygiene products market, the consumption of hot air non-woven fabrics in personal hygiene products is on a rising trend, and the prospects are very promising. Pu0026G, Kimberly-Clark, Kao, Unicharm, Hengan and other well-known sanitary products manufacturers at home and abroad have compared and analyzed the hot-air non-woven fabrics and found that the larger the thickness, the better the fluffy non-woven fabrics, and the liquid penetration and back seepage properties The better, the drier and comfortable. In order to increase the thickness of nonwoven fabric manufacturers, most of them improve the selection and ratio of fibers, the adjustment of the carding process, and the adjustment of the hot air process. However, due to many factors affecting the thickness of nonwovens, and the production capacity is tight, Therefore, the improvement of the thickness is not ideal. This article focuses on the study of the production process of non-woven fabrics, discusses the impact of production processes on the thickness of non-woven fabrics, and increases the thickness of hot-air non-woven fabrics by adjusting the carding disorder, cooling method, drafting speed difference, etc., to ensure the same quality of non-woven fabrics. Produce more sanitary products. At present, increasing the thickness of nonwoven fabrics without increasing the surface density is one of the core competition content of nonwoven fabric manufacturers. Experimental conclusions According to the test results and analysis, it can be concluded (1) By increasing the carding disorder to increase the number of fiber lateral distribution, the instrument test thickness and bulkiness of the hot air non-woven fabric can be improved. (2) Air-conditioning air cooling is more conducive to increasing the thickness and bulkiness of the instrument test of the hot-air nonwoven fabric, and the lower the cooling temperature, the faster the fiber setting, the smaller the tensile deformation of the fiber web, and the greater the thickness and bulkiness of the instrument test Easy to keep. (3) Reducing the drafting speed difference of the cooling roll hot-blast stove can keep the thickness and bulkiness of the hot-blast non-woven fabrics better; while the hot-blast stove-carding machine drafting speed difference, the winding roll-cooling roll drafting speed difference It has little influence on the thickness and bulkiness of the instrument.