Preparation method of low-resistance and easy-to-shape non-woven fabrics for medical masks
A non-woven, low-resistance technology, applied in application, fiber type, non-woven fabric, etc., can solve problems such as single function, and achieve the effect of high filtration efficiency, high antibacterial property, and low resistance
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[0022] Example 1
[0023] Weigh 30 parts of polylactic acid, 7 parts of succinylated chitosan / graphene oxide composite material, 35 parts of polyimide, and 33 parts of bamboo charcoal fiber according to parts by weight, and mix them thoroughly to obtain material I; The screw extruder extrudes and granulates, and the extrusion temperature is 280℃ to obtain material II; the material II is vacuum dried at 100℃ for 32h, so that the moisture content is less than 110ppm, and the dried material II is heated by the screw extruder at 260 It melts and extrudes into a melt at ℃. When the melt is extruded from the orifice of the die, it is blown by a high-pressure hot air flow with a flow rate of 100m / sec on both sides of the orifice and a temperature of 220℃. Material II is melted. The body is stretched into superfine fibers and condensed on a drum receiver 10cm away from the nozzle. The drum speed of the receiver is 28r / min, which is self-bonded into a non-woven fabric; spray antistatic on...
Example Embodiment
[0025] Example 2
[0026] Weigh 50 parts of polylactic acid, 5 parts of succinylated chitosan / graphene oxide composite material, 20 parts of polyimide, and 25 parts of bamboo charcoal fiber according to parts by weight and mix them thoroughly to obtain material I; respectively weigh parts by weight Take 30 parts of polylactic acid, 7 parts of succinylated chitosan / graphene oxide composite material, 35 parts of polyimide, and 33 parts of bamboo charcoal fiber to fully mix to obtain material I; extrude material I through a twin-screw extruder After granulation, the extrusion temperature is 260℃ to obtain material II; the material II is vacuum dried at 95℃ for 24h to make the water content less than 110ppm. The dried material II is heated by a screw extruder, melted at 290℃, and extruded. When the melt is extruded from the orifice of the die, it is blown by a high-pressure hot air flow with a flow rate of 150m / sec on both sides of the orifice and a temperature of 220℃, and the mater...
Example Embodiment
[0028] Example 3
[0029] Weigh 36 parts of polylactic acid, 5 parts of succinylated chitosan / graphene oxide composite material, 24 parts of polyimide, and 35 parts of bamboo charcoal fiber according to parts by weight, and mix them thoroughly to obtain material I; respectively weigh by parts Take 30 parts of polylactic acid, 7 parts of succinylated chitosan / graphene oxide composite material, 35 parts of polyimide, and 33 parts of bamboo charcoal fiber to fully mix to obtain material I; extrude material I through a twin-screw extruder After granulation, the extrusion temperature is 300℃ to obtain material II; the material II is vacuum dried at 90℃ for 36h, so that the moisture content is less than 110ppm, and the dried material II is heated by a screw extruder, melted at 230℃, and extruded When the melt is extruded from the spinneret hole of the die, it is blown by the high-pressure hot air flow with a velocity of 150m / sec on both sides of the spinneret and a temperature of 220℃,...
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