This invention relates to an industrial ultralight
nonwoven fabric and its preparation method, belonging to the field of ultra-high molecular weight
polyethylene fiber and its products. The invention involves unwinding ultra-high molecular weight
polyethylene fibers onto an adjustable tension
yarn frame, followed by sequential processes including bundling, positioning, three-stage progressive
yarn spreading, gluing,
corona treatment with an ultra-thin
polymer film,
drying, orthogonal lamination, and
heat setting to obtain the
nonwoven fabric. The three-stage progressive
yarn spreading device includes a spiral positioning spreading roller, a spreading plate, and a third-stage spreading device with a dynamic lifting roller
assembly. The lifting amplitude and
angular velocity of the dynamic spreading roller are adjusted through a specific
control function. This invention also uses an active modifier to modify the resin, combined with
corona treatment, to significantly enhance interlayer bonding. The resulting
nonwoven fabric has a surface density as low as 20-50 g / m². 2 With a thickness of 1-10μm, a
hydrostatic pressure of up to 10000-30000mmH2O, and an interlayer bonding force of 0.3-2N / mm, it combines ultra-lightweight, high strength, high
fatigue resistance, and high waterproof performance, and can simultaneously meet the application requirements of bulletproof and outdoor equipment.