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Microfoamed polypropylene and plant-fiber composite material and preparation method thereof

A plant fiber and composite material technology, which is applied in the field of micro-foamed polypropylene plant fiber composite material and its preparation, can solve the problems of difficulty in foaming and gas retention, and achieves high foaming ratio, uniform cell distribution, and low cost. low cost effect

Inactive Publication Date: 2018-06-29
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary PP is a crystalline polymer, which hardly flows when the temperature is lower than the melting point, and it is difficult to foam; when the temperature is higher than the melting point, the melt strength drops sharply, and the lower melt viscosity and melt strength make the produced gas is hard to hold

Method used

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  • Microfoamed polypropylene and plant-fiber composite material and preparation method thereof
  • Microfoamed polypropylene and plant-fiber composite material and preparation method thereof
  • Microfoamed polypropylene and plant-fiber composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Preparation of micro-foamed polypropylene plant fiber composite material

[0016] (1) Weigh by mass: 10 parts of high-strength polypropylene, 54 parts of high-fluidity polypropylene, 25 parts of plant fiber, 10 parts of polyethylene, 0.5 parts of nucleating agent calcium carbonate and dispersant of ethylene stearic acid Amide 0.5 part.

[0017] (2) Mix the components in the step (1) with a mixer, add them into a twin-screw extruder to extrude and granulate, and then prepare the plant fiber composite polypropylene matrix.

[0018] (3) Add 2 parts of NaHCO in the plant fiber composite polypropylene matrix prepared in step (2) 3 , mixed evenly, and the micro-foaming plant fiber composite polypropylene material was prepared by using an injection molding process.

[0019] The mechanical properties of unfoamed and foamed materials were tested respectively, and the results are shown in Table 1.

Embodiment 2

[0020] Embodiment 2: Preparation of micro-foamed polypropylene plant fiber composite material

[0021] (1) Weighing by mass: 12 parts of high-strength polypropylene, 50 parts of high-fluidity polypropylene, 29 parts of plant fiber, 8 parts of polyethylene, 0.5 parts of nucleating agent calcium carbonate and dispersant of ethylene stearic acid Amide 0.5 parts.

[0022] (2) Mix the components in the step (1) with a mixer, add them into a twin-screw extruder to extrude and granulate, and then prepare the plant fiber composite polypropylene matrix.

[0023] (3) Add 2 parts of foaming agent to the plant fiber composite polypropylene matrix prepared in step (2), mix well, and use the injection molding process to prepare the slightly foamed plant fiber composite polypropylene material.

[0024] The mechanical properties of unfoamed and foamed materials were tested respectively, and the results are shown in Table 2.

Embodiment 3

[0025] Embodiment 3: Preparation of micro-foamed polypropylene plant fiber composite material

[0026] (1) Weigh by mass: 15 parts of high-strength polypropylene, 54 parts of high-fluidity polypropylene, 20 parts of plant fiber, 10 parts of polyethylene, 0.6 part of nucleating agent calcium carbonate and dispersant of ethylene stearic acid Amide 0.4 parts.

[0027] (2) Mix the components in the step (1) with a mixer, add them into a twin-screw extruder to extrude and granulate, and then prepare the plant fiber composite polypropylene matrix.

[0028] (3) Add 2 parts of foaming agent to the plant fiber composite polypropylene matrix prepared in step (2), mix well, and use the injection molding process to prepare the slightly foamed plant fiber composite polypropylene material.

[0029] The mechanical properties of unfoamed and foamed materials were tested respectively, and the results are shown in Table 3.

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Abstract

The invention discloses a microfoamed polypropylene and plant-fiber composite material and a preparation method thereof. The microfoamed polypropylene and plant-fiber composite material and the preparation method disclosed by the invention have the beneficial effects that by adoption of high-strength and high-fluidity PP for complexing, the melt strength and the fluidity of a base material are effectively ensured, not only can the technical defects of the existing PP foaming be overcome, but also the benefit for forming and processing of products can be achieved meanwhile; a foaming product with uniform foam-hole distribution, high foaming ratio and excellent property can be prepared by adopting NaHCO3 is adopted as a foaming agent and under the condition of adopting an injection process for processing; meanwhile, plant fiber has the advantages of rich source, low cost, easiness in processing and dyeing, complete waste degradation and the like; in addition, the plant fiber has unique wheat fragrance, and by matching with mold patterns, a unique surface sensing effect and and good apparent quality can be obtained, so that the microfoamed polypropylene and plant-fiber composite material has good development prospect in the fields of automobile interior and exterior decorations, packs, foaming tableware and the like.

Description

technical field [0001] The invention relates to a polypropylene plant fiber composite material, in particular to a micro-foamed polypropylene plant fiber composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) foam material has the advantages of weight reduction, good heat insulation and high hardness, and has become one of the hot spots in the field of foam material research. However, ordinary PP is a crystalline polymer, which hardly flows when the temperature is lower than the melting point, and it is difficult to foam; when the temperature is higher than the melting point, the melt strength drops sharply, and the lower melt viscosity and melt strength make the produced Gas is difficult to hold. [0003] With the development of automobiles in the direction of low energy consumption and low emission, and the strengthening of social environmental protection awareness, it is imperative to reduce the weight of auto parts and deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L97/02C08L23/06C08K3/26C08K5/20C08J9/08C08J9/04
CPCC08J9/0028C08J9/0061C08J9/0066C08J9/04C08J9/08C08J2203/02C08J2323/12C08J2423/06C08J2423/12C08J2497/02C08K5/20C08K2003/265
Inventor 杜西兰秦舒浩龙雪彬靳进波石敏陈光辉
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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