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 stre

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

Example Embodiment

[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...

Example Embodiment

[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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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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