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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.

Inactive Publication Date: 2015-05-27
LIUZHOU BEIDIFEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Polypropylene is one of the most widely used general-purpose resins, but it has poor low-temperature impact strength, is easy to become brittle, and has poor weather resistance and dyeability, so it needs to be toughened and modified

Method used

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  • Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material
  • Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material
  • Preparation method of plant microfine fibers/rubber powder/polypropylene thermal stretch composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0043] (1) Plant fibers are dried at 95-110°C until the moisture content is below 1%, and crushed into powders with a particle size of 150-200μm;

[0044] (2) The rubber is crushed into a powder with a particle size of 150-200 μm;

[0045] (3) Heat and melt polypropylene and maleic anhydride grafted polypropylene at 170-200°C in a mixer, add fiber powder and rubber powder after complete melting, and mix within this temperature range for 5-10 minutes;

[0046] (4) Put 170-200°C heat transfer oil into the insulation jacket of the high-temperature colloid mill for heat preservation, and transport the mixed polypropylene mixture to the colloid mill for shearing and grinding. The speed of the colloid mill is 3000rpm, and the ground mixture enters the single screw extruder or twin-screw extruder extrusion;

[0047] (5) The extrusion temperature of the extruder is 170-200°C, the die temperature is 190-200°C, the screw speed of the extruder is 20-100rpm, the die is a rect...

Embodiment 1-13

[0050] Table 1 Embodiment 1-13 formula

[0051]

[0052] In order to investigate the mechanical properties of the plant microfiber / rubber powder / polypropylene / heat-stretched composite material prepared by the present invention, the composite material was prepared according to GB / T 2546.2-2003 "Plastic Polypropylene (PP) Molding and Extrusion Materials No. 2" Section: Sample Preparation and Performance Determination "Preparing Samples;

[0053] Tensile strength and elongation at break shall be tested according to the methods specified in GB / T 1040.2-2006 "Determination of Tensile Properties of Plastics 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 Flexural Properties of Plastics";

[0055] The notched impact strength is tested according to the method specified in GB / T 1843-2008 "Determination of Izod Impact Strength of Plas...

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Abstract

The invention discloses a preparation method of plant microfine fibers / rubber powder / polypropylene thermal stretch composite material. In the method, the plant fibers are used as a dispersion phase, polypropylene is used as a matrix polymer, fine rubber powder (FRP) is added as polypropylene flexibilizer, at temperature of 170-200 DEG C, under the action of grinding and shearing of a colloid mill, the plant fibers are ground and mutually kneaded to be refined to form micron-sized microfine fibres, the fine rubber powder (FRP) forms ultrafine rubber powder (UFRP), the plant fibers and the ultrafine rubber powder are evenly dispersed in polypropylene molten mass, in a manner of melt extrusion-thermal stretch-quenching, the microfine fibers are enabled to change in shape in site and are arranged in radial direction, and the plant microfine fibers / rubber powder / polypropylene thermal stretch composite material is obtained after granulation. In the method provided by the invention, the raw materials are selected from reprocessed plastic, industrial and daily life waste fibers (such as bagasse and waste paper), waste rubber, and the like, the obtained composite material has low cost and good comprehensive performance, and as a result, renewable resource is subjected to high-valued treatment and endowed with increased additional value.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a heat-stretched composite material and a preparation method thereof. Background technique [0002] Fiber reinforcement modification is a common method to improve the mechanical properties of resins. Adding fibers can significantly strengthen the resin matrix, but it is easy to cause problems such as increased processing latitude, accelerated equipment wear, and difficulties in recycling waste materials. Therefore, in situ fibrillation techniques have attracted attention. [0003] In-situ microfibrillation technology is a polymer blend morphology control technology, which can control the morphology of polymer blends and their composites, and is an effective way to improve the performance of thermoplastic polymer materials. [0004] In-situ microfibrillation blends are composed of incompatible dispersed phase polymers and matrix polymers. After the two are melted and mix...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L97/02C08L21/00C08L51/06B29C47/92B29C48/92
CPCC08L23/12B29C48/92B29C2948/9258B29C2948/92704C08L2205/035C08L2205/08C08L2205/16C08L97/02C08L21/00C08L51/06
Inventor 吴国勇黄梅珍吴承武
Owner LIUZHOU BEIDIFEN TECH
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