A light-weight polypropylene-plant fiber composite and a preparing method thereof

A plant fiber and composite material technology, applied in the field of lightweight polypropylene plant fiber composite material and its preparation, can solve the problems of improper selection of chemical foaming agent, high cost of foaming agent, environmental pollution, etc., and achieve good development prospects, Good sound absorption and heat insulation performance

Inactive Publication Date: 2018-05-15
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We know that improper selection of chemical foaming agent will cause environmental pollution, and in addition, the cost of using foaming agent is high

Method used

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  • A light-weight polypropylene-plant fiber composite and a preparing method thereof

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Effect test

Embodiment 1

[0015] Embodiment 1 of the present invention: lightweight polypropylene plant fiber composite material, calculated in parts by mass, including 60 parts of high melt strength polypropylene, 20 parts of plant fiber, 18 parts of polyethylene, 1 part of nucleating agent and dispersant 1 part is the preparation material. The polypropylene is a high melt strength polypropylene, its melt index (230°C / 2.16kg) is 1.3g / 10min, and its melt tension (230°C) is 20g.

[0016] The preparation method of lightweight polypropylene plant fiber composite material comprises the following steps:

[0017] 1) Take each component according to the above-mentioned parts by mass, mix polypropylene, plant fiber, polyethylene, nucleating agent and dispersant to make it fully dispersed; wherein, the plant fiber is taken from the stalk of the crop, and it is mixed before mixing. The plant fibers were pre-dried at 80°C for 1.5h.

[0018] 2) Add the blend in step 1) to a twin-screw extruder for extrusion. The...

Embodiment 2

[0020] Embodiment 2 of the present invention: Lightweight polypropylene plant fiber composite material, calculated in parts by mass, including 70 parts of high melt strength polypropylene, 15 parts of plant fiber, 14 parts of polyethylene and 1 part of nucleating agent as raw materials for preparation . Described polypropylene is high-melt strength polypropylene, and its melt index (230 ℃ / 2.16kg) is 2.5g / 10min, and melt tension (230 ℃) is 18g

[0021] The preparation method of lightweight polypropylene plant fiber composite material comprises the following steps:

[0022] 1) Take each component according to the above-mentioned parts by mass, mix polypropylene, plant fiber, polyethylene, nucleating agent and dispersant to make it fully dispersed; wherein, the plant fiber is taken from the stalk of the crop, and it is mixed before mixing. The plant fibers were pre-dried at 80°C for 1.5h.

[0023] 2) Add the blend in step 1) to a twin-screw extruder for extrusion. The temperatu...

Embodiment 3

[0025] Embodiment 3 of the present invention: lightweight polypropylene plant fiber composite material, calculated in parts by mass, including 70 parts of high melt strength polypropylene, 18 parts of plant fiber, 10 parts of polyethylene, 1 part of nucleating agent and dispersant 1 part is the preparation material. Described polypropylene is high-melt strength polypropylene, and its melt index (230 ℃ / 2.16kg) is 1.5g / 10min, and melt tension (230 ℃) is 15g

[0026] The preparation method of lightweight polypropylene plant fiber composite material comprises the following steps:

[0027] 1) Take each component according to the above-mentioned parts by mass, mix polypropylene, plant fiber, polyethylene, nucleating agent and dispersant to make it fully dispersed; wherein, the plant fiber is taken from the stalk of the crop, and it is mixed before mixing. The plant fibers were pre-dried at 80°C for 1.5h.

[0028] 2) Add the blend in step 1) to a twin-screw extruder for extrusion. ...

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Abstract

A light-weight polypropylene-plant fiber composite and a preparing method thereof are disclosed. Polypropylene (PP) having high melt strength is adopted as a matrix, thus ensuring melt strength of thematrix. A plant fiber characteristic that thermal-resisting temperature of the plant fibers is 160 DEG C or below, the plant fibers are dewatered and gradually coke at a temperature higher than the thermal-resisting temperature, and the plant fibers are partially decomposed under certain pressure at certain temperature to generate gas is utilized in a processing process, and plant fibers are partially decomposed at high temperature to generate gas so as to generate micro pores, thus achieving an objective of light weight. No foaming agent is added, and the PP having high melt strength can prevent gas bubble merging and breakage, can effectively cover gas and can prevent gas from escaping from the PP matrix. The composite obtained from the two raw materials under specific processing conditions has a light weight and good noise deadening and heat insulating properties. In addition, the plant fibers have unique wheat fragrance, and a unique surface sense and good appearance quality can be obtained.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a lightweight polypropylene plant fiber composite material and a preparation method thereof. Background technique [0002] Foamed plastic is a composite plastic based on plastic and gas dispersed in solid plastic. Foaming can reduce product density, reduce product quality, save materials and reduce costs. The three most widely used foams are polyethylene (PE) foam, polyurethane (PU) foam, and polystyrene (PS) foam. However, due to the poor mechanical properties and heat resistance of PE foam materials, it is difficult to degrade and easily cause environmental pollution, which limits the application of PE foam materials; the isocyanate produced by PU foam materials in the production process is highly toxic and harmful to the human body. Serious hazard; the chlorofluorocarbons used in the production process of PS foam products will cause damage to the ozone layer in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L97/02C08L23/06
CPCC08L23/12C08L2205/03C08L2205/16C08L97/02C08L23/06
Inventor 杜西兰秦舒浩龙雪彬石敏靳进波
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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