what is spunbond nonwoven
Spunbond nonwoven, the main materials are polyester and polypropylene, high strength, high temperature resistance
Spun-bonded non-woven fabric: after extruding and stretching the polymer to form continuous filament, the filament is laid into a net, and the fiber net is then bonded by itself, thermal bonding, chemical bonding or mechanical reinforcement to make the fiber net into non-woven fabric.
High temperature resistant performance is good, high temperature resistant performance is good (polypropylene can be used in 150 ℃ environment medium, polyester can be used in 260 ℃ environment medium and long term), ageing resistance, uv resistance, elongation, high stability and good permeability, corrosion resistance, sound insulation, moth-proofing, non-toxic.
THE MAIN PURPOSE
The main materials of spunbond nonwovens are polyester and polypropylene.
The main products of spunbond nonwoven are polypropylene, polyester (long fiber, short fiber) nonwoven fabric, the most common and most commonly used application is nonwoven bag, nonwoven packaging, etc. For spunbond nonwoven identification is easier, generally good bidirectional fastness, generally spunbonded nonwoven rolling point is a diamond.
Application of the level can also do flowers packaging cloth, cloth and so on, wear resistance, strong feel good and so on, let him become the best choice to make this kind of products.
SPUNBONDED NONWOVEN PROCESS
Polypropylene: polymer material (polypropylene + back) - big screw high temperature melt extrusion - filter - metering pump (dosing) - spinning, spinning stretching up and down suction entrance) - cooling - air traction - net curtain into net - up and down roller (pre-reinforcement) - hot rolling mill (reinforced) - winding down cloth cutting, weighing and packing, finished product warehouse
Polyester: processed polyester chip - big screw stem, high temperature melting, filters, metering pump (dosing) - spinning (spinning stretching up and down suction entrance) - cooling - air traction - net curtain into net - up and down roller (pre-reinforcement) - hot rolling mill (reinforced) - winding down cloth cutting, weighing and packing, finished product warehouse
TECHNICAL TYPES OF SPUNBOND NONWOVENS
In the world, spunbonded non-woven technology mainly includes Germany laifen's lacofield technology, Italy's STP technology and Japan's kobe steel technology. The current situation, especially in the world to leffen technology become the mainstream technology. It is now in its fourth generation. It is characterized by the use of negative pressure hypervelocity draft, the fiber can be stretched to about 1 denier. There have been many domestic enterprises to copy, because its core technology has many frontier problems have not been solved or mastered, domestic equipment manufacturers to reach the level of laifen technology is still some time.