Preparation method of sm non-woven fabrics for roof anti-slip

A preparation method of SM non-woven fabrics for roof anti-slip, characterized by comprising:

• preparing spunbond non-woven fabric raw materials, preparing spunbond non-woven fabrics, preparing meltblown non-woven fabric raw materials, preparing primary SM non-woven fabrics, and post-processing;
• the spunbond non-woven fabric raw materials are prepared by uniformly mixing polypropylene with a low melt flow index, polypropylene with a high melt flow index, sodium alginate, antioxidant 1010, zinc stearate, ultraviolet absorber UV-531, polyethylene glycol 6000, reinforcing agent, adhesive agent, and nano titanium dioxide;
• in the step of preparing spunbond non-woven fabric raw materials, the weight ratio of polypropylene with a low melt flow index, polypropylene with a high melt flow index, sodium alginate, antioxidant 1010, zinc stearate, ultraviolet absorber UV-531, polyethylene glycol 6000, reinforcing agent, adhesive agent and nano titanium dioxide is (120 to 130):(7 to 9):(3 to 5):(0.5 to 0.7):(2 to 4):(1 to 2):(6 to 8):(7 to 9):(3 to 4):(2 to 4);
• the reinforcing agent is prepared by the method as follows:
• placing hexagonal boron nitride powder, light calcium carbonate, hexadecyl trimethyl ammonium bromide, and sodium hexametaphosphate in a ball mill for ball milling at a ball-to-material ratio of (20 to 25):1, a ball milling speed of 200 to 300 rpm, and a temperature of 60° C. to 65° C. for 20 to 30 min, and obtaining a primary reinforcing agent after the ball milling ends, subjecting the primary reinforcing agent to vacuum heating treatment at a vacuum degree of 100 to 120 Pa, and a temperature of 70° C. to 80° C., and obtaining the reinforcing agent at the end of the vacuum heating treatment;
• wherein, the weight ratio of hexagonal boron nitride powder, light calcium carbonate, hexadecyl trimethyl ammonium bromide, and sodium hexametaphosphate is (20 to 22):(8 to 10):(3 to 5):(7 to 10);
• the meltblown non-woven fabric raw materials are prepared as follows:
• uniformly mixing polypropylene, polybutylene terephthalate, polyethylene, nano silicon dioxide, coconut monoisopropanolamide, modified compatibilizer and tackifier to obtain meltblown non-woven fabric raw materials;
• the modified compatibilizer is prepared by the method as follows:
• adding polypropylene with a high melt flow index, maleic anhydride, and methyl methacrylate into a mixer for low-temperature treatment with a speed controlled at 250 to 280 rpm, and a temperature controlled at 2° C. to 5° C. for 20 to 25 min, adding dicumyl peroxide and 1-dodecanethiol, and then raising the temperature to 40° C. to 45° C. at a heating rate of 1 to 1.2° C./min, stirring at 40° C. to 45° C. for 15 to 20 min, adding 2-hydroxyethyl methacrylate and sodium persulfate, then raising the temperature to 50° C. to 55° C. at a heating rate of 0.8 to 1° C./min, stirring at 50° C. to 55° C. for 20 to 25 min, and then naturally recovering to room temperature to obtain the modified compatibilizer;
• in the preparation of the modified compatibilizer, the weight ratio of polypropylene with a high melt flow index, maleic anhydride, methyl methacrylate, dicumyl peroxide, 1-dodecanethiol, 2-hydroxyethyl methacrylate, and sodium persulfate is (100 to 110):(5 to 6):(2 to 3):(0.5 to 0.8):(0.6 to 0.7):(3 to 4):(0.2 to 0.4);
• in the post-processing process, the SM non-woven fabrics are obtained by spraying an active liquid on the surface of primary SM non-woven fabric at 40° C. to 45° C. with a usage amount of the active liquid controlled at 50 to 60 g/m2, and drying at 40° C. to 45° C. after spraying;
• the components of the active liquid, in parts by weight, comprise 100 to 110 parts of deionized water, 7 to 9 parts of maltodextrin, 5 to 6 parts of sodium tripolyphosphate, 2 to 3 parts of sodium dodecyl sulfate, and 0.2 to 0.5 parts of poly(diallyldimethylammonium chloride).

The preparation method of SM non-woven fabrics for roof anti-slip of claim 1, wherein, the primary SM non-woven fabric is prepared as follows:

• heating and melting the meltblown non-woven fabric raw material, filtering the resulted melt, extruding the melt through a spinneret hole on a die head after distributing the melt, and obtaining a meltblown fiber by hot air stretching, spraying the meltblown fiber onto the spunbond non-woven fabrics to form a mesh to obtain the primary SM non-woven fabrics;
• temperatures in screw zone during the heating and melting are 200° C. to 205° C., 210° C. to 215° C., and 230° C. to 235° C., respectively;
• the filter temperature during the melt filtering is 230° C. to 235° C.;
• the temperature of the metering pump during the melt distributing is 230° C. to 235° C., and the rotational speed is 25 to 30 rpm;
• the wind temperature during the hot air stretching is 200° C. to 210° C., and the rotational speed is 700 to 710 rpm;
• the mesh forming speed is 25 to 27 rpm;
• the aperture of the spinneret hole is 0.45 to 0.55 mm;
• and
• the fiber diameter of the meltblown fiber is 10 to 12 μM.