Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material
A technology of micro-fiber and composite material, applied in the field of hot-stretched composite material and its preparation, can solve the problems of poor weather resistance and dyeability, poor low-temperature impact strength, easy embrittlement, etc., and achieve the effect of good processing performance and mechanical performance.
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[0042] Example 1-12
[0043] (1) Plant fibers are dried at 95-110°C to a moisture content of less than 1%, and broken into powder with a particle size of 150-200μm;
[0044] (2) The rubber is crushed into powder with a particle size of 150-200μm;
[0045] (3) Heat and melt polypropylene and maleic anhydride grafted polypropylene in a mixer at 170-200°C. After it is completely melted, add fiber powder and rubber powder and mix for 5-10 minutes within this temperature range;
[0046] (4) Heat conduction oil at 170-200℃ in the high temperature colloid mill insulation jacket, and transport the mixed polypropylene mixture to the colloid mill for shear grinding. The colloid mill speed is 3000rpm, and the ground mixture enters the single screw Extruder or twin screw extruder;
[0047] (5) The extrusion temperature of the extruder is 170-200℃, the temperature of the die is 190-200℃, the screw speed of the extruder is 20-100rpm, the die is a rectangular narrow slot die, and the cone...
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[0050] Table 1 Formulation of Example 1-13
[0051]
[0052] In order to investigate the mechanical properties of the plant microfiber / rubber powder / polypropylene / thermal stretch composite material prepared by the present invention, the composite material was made in accordance with GB / T 2546.2-2003 "Plastic Polypropylene (PP) Molding and Extrusion Material No. 2 Part: Sample Preparation and Performance Measurement "Prepare the sample;
[0053] The tensile strength and elongation at break shall be tested according to the method specified in GB / T 1040.2-2006 "Plastic Tensile Properties Determination Part 2: Test Conditions for Molded and Extruded Plastics";
[0054] The flexural strength and flexural modulus shall be tested according to the method specified in GB / T 9341-2008 "Determination of Plastic Bending Properties";
[0055] Notched impact strength is tested according to the method specified in GB / T 1843-2008 "Determination of Impact Strength of Plastic Cantilever Beams".
[0056...
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