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Surface powder spraying flame-retardant technology for fibrilia composite material

A composite material and hemp fiber technology, which is applied in the field of flame-retardant composite material preparation, can solve the problems of reducing the mechanical properties of composite materials, reducing the toughness of hemp fiber, weakening the compatibility between hemp fiber and the matrix, and achieving excellent flame-retardant performance and The effect of simple mechanical properties and preparation process

Inactive Publication Date: 2016-06-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method reduces the toughness of the hemp fiber due to the immersion of the solvent, and also weakens the compatibility between the hemp fiber and the matrix, seriously reducing the mechanical properties of the composite material. In addition, the solvent volatilizes and causes environmental pollution.

Method used

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  • Surface powder spraying flame-retardant technology for fibrilia composite material
  • Surface powder spraying flame-retardant technology for fibrilia composite material
  • Surface powder spraying flame-retardant technology for fibrilia composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A. Surface dusting

[0019] Cut the hemp fiber composite mat with a mass of 38g and a size of 170*170mm, then weigh 2.375g of EG powder and 9.5g of PP powder, and spray the PP powder evenly on the upper and lower surfaces of the composite fiber mat, and then spray the EG evenly on the composite material The upper and lower surfaces of the fiber mat.

[0020] B. Thermoforming

[0021] The composite hemp fiber felt prepared in the above steps is preheated in a hot pressing mold, and then hot pressed once to obtain a hemp fiber composite material board with excellent flame retardancy and mechanical properties.

[0022] The content and performance of each component of the hemp fiber composite board are shown in Table 1 and Table 2, respectively.

Embodiment 2

[0024] A. Surface dusting

[0025] Cut out hemp fiber composite mats with a mass of 38g and a size of 170*170mm, then weigh 1.425g of EG powder, 0.95g of APP powder and 9.5g of PP powder, mix the APP and PP powder evenly, and spray them on the upper and lower surfaces of the composite fiber mat. Then spray EG evenly on the upper and lower surfaces of the composite fiber mat.

[0026] B. Thermoforming

[0027] The composite hemp fiber felt prepared in the above steps is preheated in a hot pressing mold, and then hot pressed once to obtain a hemp fiber composite material board with excellent flame retardancy and mechanical properties.

[0028] The content and performance of each component of the hemp fiber composite board are shown in Table 1 and Table 2, respectively.

Embodiment 3

[0030] A. Surface dusting

[0031] Cut the hemp fiber composite material mat with a mass of 38g and a size of 170*170mm, then weigh 1.1875g of EG powder, 1.1875g of APP powder and 9.5g of PP powder, mix the APP and PP powder evenly, and spray them on the upper and lower surfaces of the composite fiber mat. Then spray EG evenly on the upper and lower surfaces of the composite fiber mat.

[0032] B. Thermoforming

[0033] The composite hemp fiber felt prepared in the above steps is preheated in a hot pressing mold, and then hot pressed once to obtain a hemp fiber composite material board with excellent flame retardancy and mechanical properties.

[0034] The content and performance of each component of the hemp fiber composite board are shown in Table 1 and Table 2, respectively.

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PUM

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Abstract

The invention discloses a surface powder spraying flame-retardant technology for a fibrilia composite material. Fibrilia composite material felt is used as a base body, different contents and proportions of flame retardants and an aid are evenly sprayed on upper and lower surfaces of the base body, and finally, a fibrilia composite material board with flame-retardant performance is obtained through hot press molding, wherein the flame-retardants are APP (ammonium polyphosphate) and EG (expansible graphite), and the aid is PP (polypropylene) powder. The technology has the advantages that the consumption of the flame retardants is low, the technological process is simple and environment-friendly and the like, the fibrilia board prepared with the technology has excellent flame retardation and mechanical performance, is free of toxins and volatile matters and can be widely applied to manufacturing of interior parts of automobiles, motor cars and airplanes.

Description

technical field [0001] The invention belongs to the technical field of preparation of flame retardant composite materials, in particular to a surface dusting flame retardant process of hemp fiber composite materials, in particular to prepare flame retardant composite materials by using hemp fiber composite material felt and flame retardants such as APP and EG. material method. Background technique [0002] Natural hemp fiber felt has the advantages of low cost, low density, high toughness, and high safety. Its composite material has been widely used in the manufacture of automotive interior parts. In order to expand its application in motor vehicles, aircraft and other fields, hemp fiber composites need to meet more stringent requirements for environmental protection, flame retardancy and mechanical properties. At present, the flame retardant modification method of the common hemp fiber mat is mainly to pre-impregnate the fiber mat with a solution containing a flame retarda...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/12C08K3/04C08K3/32C08J3/20
CPCC08L97/02C08J3/203C08J2397/02C08J2423/12C08L2201/02C08L2205/16C08L23/12C08K3/04C08K2003/323
Inventor 窦艳丽郭博渊
Owner JILIN UNIV
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