Spunbond non-woven fabrics are extruded and stretched polymers to form continuous filaments, the filaments are laid into a web, and the web is then self-bonded, thermally bonded, chemically bonded or mechanically reinforced. into a non-woven fabric.
Raw Material
Polypropylene is a commonly used polymer in the spinning process, and its main performance parameters are isotacticity, melt index (MFI) and ash content.
The spinning process requires the isotacticity of polypropylene to be above 95%, and if it is less than 90%, spinning is difficult. The structural formula of polypropylene is:
[ CH2－CH ]n
CH3
During the polymerization process, three configurations of polymers can be produced due to the different positions of the methyl groups in the steric space.
Features
1. advantage:
The process flow is short and the output is high.
The product has good mechanical properties: high strength and long elongation at break.
The product has a wide range of adaptability: the thickness ranges from 8.5g/m2 to 2000 g/m2, which can be used for clothing, civil construction materials, etc.
2. shortcoming
The uniformity of the web formation is not as good as that of the dry process.
Less flexibility for product changes.
Process Flow
Polymer (polypropylene + return material) - large screw high temperature melt extrusion - filter - metering pump (quantitative conveying) - spinning (up and down suction at the entrance of the wanton) - cooling - air traction - - Net curtain forming - upper and lower pressing rollers (pre-reinforcement) - rolling mill hot rolling (reinforcement) - winding - reverse distribution and slitting - weighing and packaging - finished product storage
Technical Characteristics of Spunbond Nonwovens
1. High production capacity
2. The product has good mechanical properties
3. Low production cost
4. Production is easy to manage
Type of Technology
The world's spunbond non-woven technology mainly includes Lacoffel technology from Reifen, Germany, STP technology from Italy, and Kobe Steel technology from Japan. The current situation, especially with Reffin technology becoming the mainstream technology in the world. It has now developed to the fourth generation of technology. It is characterized by the use of negative pressure ultra-high-speed air drafting, and the fiber can be stretched to about 1 denier.
Applications
1. Clothing: Garment lining, winter thermal insulation materials (ski shirts, quilts, inner cores of sleeping bags), work clothes, surgical gowns, protective clothing, suede materials, clothing accessories
2. Daily necessities: non-woven bags, flower packaging cloth, luggage cloth, home decoration (curtains, furniture covers, tablecloths, sofa beds, window covers, wall coverings), needle-punched chemical fiber carpets, coating materials (artificial leather)
3. Agricultural: Agricultural non-woven fabrics, crop protection fabrics, seedling raising fabrics, irrigation fabrics, thermal insulation curtains, garden thermal insulation, flower and grass thermal insulation, urban greening and anti-cold and anti-freezing products; to protect newly planted seedlings from winter and cold, suitable for windshields, hedges, color blocks and other plants Covering; covering of bare construction sites (to prevent dust), slope protection of highways, etc;
4. Medical and hygiene: surgical gowns, protective clothing, disinfection wraps, masks, diapers, civilian wipes, wipes, wet wipes, magic towels, soft towel rolls, beauty products, sanitary napkins, sanitary pads, and Disposable sanitary cloth, etc.
5. Construction: It can be used to cover bare construction sites, urban green spaces, golf courses, highway slope protection, slope protection greening on both sides of railways, rock spraying and grass planting, etc.
SUNTECH is a world-wide acting enterprise with decades of tradition and experience.Over 50
years of innovation,SUNTECH develops,produces and distributes high quality Fabric Make-up
Machines,Material Storage & Handling Equipments,based on Digitization,Automation and
Intelligence.
SUNTECH spunbond non-woven fabric equipment is developed based on the technology used in the Europe and combined with the national conditions. It is fully automatic line including online inspection, automatic slitting, automatic sorting, aseptic packaging,which has high production capacity.
SUNTECH can also produce SMS,SMMS,SSMMS and other combination nonwoven machine, also with non woven fabric slitting machine.
For more information about non woven machine,you can view our website and contact us, detail information will be provided asap.