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Sheet laminating preparation method for sisal fiber reinforced polypropylene composite material

A technology of sisal fiber and composite materials, which is applied in fiber processing, textiles and papermaking, etc., to achieve the effect of tough texture, long fiber and low price

Inactive Publication Date: 2004-01-28
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This inventive process is only suitable for the preparation of medium-strength materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0024] Examples 1-4: The raw sisal fibers were cut into 5mm, 20mm and 30mm respectively, and dried in an oven at 80°C. Stir the PVA aqueous solution with a concentration of 1% (mass percentage) and chopped SF evenly to make a fiber mat, then place it on an oil press to press and shape it, and adjust the temperature of the oil press to 100°C and the pressure to 2MPa. The PVA content in the prepared sisal fiber felt is 2%. Select 5 pieces of sisal fiber felt, sandwich the same amount of PP non-woven fabric in the interlayer, press and form it on a hydraulic press, the forming temperature is 172 ° C, and the pressure is 5 MPa. The selected PP contents are 30%, 40% and 50%, respectively.

Embodiment 5-7

[0025] Examples 5-7: The raw sisal fibers were cut into 10mm, 20mm and 30mm respectively, soaked in a fluorine-containing waterproofing agent for 1 minute, taken out and dried in the air, and dried at 80°C to obtain F-SF raw materials. Stir the PVA aqueous solution with a concentration of 5% (mass percentage) and PP powder evenly, then pour it into the F-SF for mixing, lay a felt, and then place it on a hydraulic press to shape it under pressure. Adjust the temperature of the hydraulic press to 120°C and the pressure to 2MPa. Select 5 pieces of sisal fiber felt to be laminated and place them on a hydraulic press to form them. The forming temperature is 175°C and the pressure is 4MPa. The selected PP contents are 30% and 50%, respectively.

Embodiment 8-9

[0026] Example 8-9: Cut the raw sisal fibers into 20mm and 30mm respectively, soak them in 2.5% KH-550 silane ethanol solution for 1 minute, take them out and dry them in the air, and bake them in an oven at 100°C for 4 hours to obtain KH- SF raw material. Stir the PVA aqueous solution with a concentration of 4% (mass percentage) and PP powder evenly, pour it into the F-SF for mixing, lay a felt, and then place it on a hydraulic press to shape it under pressure. Adjust the temperature of the hydraulic press to 110°C and the pressure to 2MPa. Select 5 pieces of sisal fiber felt to be laminated and place them on a hydraulic press to form them under pressure at a temperature of 180°C and a pressure of 3.5 MPa. The selected PP contents are 30% and 50%, respectively.

[0027] Table 1 shows the composition and performance data of short sisal fiber reinforced PP composites.

[0028] Example

[0029] Note: a k (KJ / m 2 ) stands for impact strength, E f (GPa) represents t...

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Abstract

The present invention adopts the sisal hemp fiber as fiber raw material, and uses the nonwoven fabric of thermoplastic resin PP, film, powder material and its fiber as resin base body, and adopts thefollowing steps: pretreating sisal hemp fiber and making it into fiber felt, hot-pressing and forming, selecting and using a certain number of fiber felts, delaminating and sand wiching pp nonwoven fabric or film, under the condition of a certain temp. and pressure hot-pressing and forming or mixing PP fiber (PP powder) directly with sisal hemp fibre, making them into fiber felt and then hot-pressing and forming so as to obtain the invented sisal hemp fiber reinforced polypropylene composite material.

Description

technical field [0001] The invention belongs to the preparation method of sisal fiber (SF) / thermoplastic resin matrix composite material. Background technique [0002] In the preparation method of existing sisal fiber / thermoplastic resin-based composite material, the short sisal fiber / low-density polyethylene composite material that people such as Kuruvilla Joseph adopt melt blending and solution blending to make, melt blending The characteristic of the method is that the damage to the sisal fiber is serious, resulting in a decline in the performance of the composite material, while the solution mixing process needs to use a large amount of toxic solvents, causing environmental pollution, and the cost is also high. Joesph et al. also prepared short sisal fiber / polypropylene composites by extrusion molding. The screw of this process seriously damages the sisal fiber, and the high temperature will cause the sisal fiber to decompose. [0003] Zeng Hanmin and Yang Guicheng use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/12C08J5/04D06M17/00
Inventor 曾汉民杨桂成梁小波
Owner SUN YAT SEN UNIV
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