Micro-nanofiber material with linear groove characteristics and orderly forming method thereof
A technology of micro-nano fiber and forming method, which is applied in the direction of filament/thread forming, fiber treatment, textile and paper making, etc. It can solve the problems of swelling and irregular interface not conforming to the expected design, etc., so as to increase the specific surface area and improve the liquid The effect of fast transmission characteristics and short process flow
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[0045] Example 1
[0046] Polypropylene (melting point of 167 ℃, isotactic index of 97.6%, ash content of 0.012%) and polyester (melting point of 110±8 ℃, intrinsic viscosity of 0.568 dL / g, and terminal carboxyl group content of 19 mol / t;) as raw materials. First, the polyester chips are dried. The preferred drying temperature in this embodiment is 60°C and the drying time is 8 hours; secondly, the polypropylene and polyester chips are blended in a ratio of 50% / 50% by mass fraction to obtain them Blended polymer chips; after that, the blended polymer chips are fed into the screw extruder to be softened and melted into a polypropylene / polyester blended melt.
[0047] The diameter of the screw extruder selected in this embodiment is 20mm, and the ratio of length to diameter is 1:28; the heating in 5 zones is set as follows: temperature of zone 1 is 170 ℃, zone 2 temperature is 190 ℃, zone 3 temperature is 210 ℃, zone 4 temperature 220 ℃ and 5 zone temperature 220 ℃.
[0048] The poly...
Example Embodiment
[0051] Example 2
[0052] The difference between Example 2 and Example 1 is that the etching time is 0-50min, and the fiber surface morphology of the obtained sample is as figure 2 Shown.
Example Embodiment
[0053] Example 3
[0054] The difference between Example 3 and Example 1 is that the concentration of the selected etching solution is 5-25%, and the fiber surface morphology of the obtained sample is as follows image 3 Shown.
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