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Fibrilia enhanced polyurethane composite board and preparation method thereof

A fiber composite board and hemp fiber technology, which is applied in the field of automobile material design and manufacture, can solve problems such as insufficient mechanical properties of the hemp fiber composite board, and achieve the effects of good application prospect, good environmental protection performance and light weight.

Inactive Publication Date: 2017-03-08
CHANGCHUN BOCHAO AUTOMOTIVE PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of insufficient mechanical properties of the existing hemp fiber composite board, the present invention proposes to add a hemp fiber reinforced polyurethane as the middle layer between the double-layer panels to realize a new type of hemp fiber reinforced polyurethane composite board

Method used

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  • Fibrilia enhanced polyurethane composite board and preparation method thereof
  • Fibrilia enhanced polyurethane composite board and preparation method thereof
  • Fibrilia enhanced polyurethane composite board and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the present embodiment, the preparation method of hemp fiber reinforced polyurethane composite board is as follows:

[0023] Step 1, laying finely opened hemp fiber felt on the hemp fiber composite board;

[0024] Step 2: Spray polyurethane on the hemp fiber felt to obtain a core layer; the polyurethane is made of rigid polyurethane foam material, and the mass ratio of hemp fiber to polyurethane is: 30% of hemp fiber and 70% of polyurethane.

[0025] Step 3, laying a layer of hemp fiber composite board on the core layer;

[0026] Step 4, then hot pressing at 120°C to 140°C and a pressure of 0.5 to 5 MPa for 30 to 100 seconds.

[0027] Step 5, after cooling, the hemp fiber reinforced polyurethane composite board is obtained.

[0028] Step 6: Cutting the hemp fiber reinforced polyurethane composite board to obtain hemp fiber reinforced polyurethane composite boards of the same size.

[0029] The structure of the obtained hemp fiber reinforced polyurethane composite ...

Embodiment 2

[0032] Step 1, laying finely opened hemp fiber felt on the hemp fiber composite board;

[0033] Step 2: Spray polyurethane on the hemp fiber felt to obtain a core layer; the polyurethane is made of rigid polyurethane foam material, and the mass ratio of hemp fiber to polyurethane is: hemp fiber 40%, polyurethane 60%.

[0034] Step 3, laying a layer of hemp fiber composite board on the core layer;

[0035] Step 4, then hot pressing at 120°C to 140°C and a pressure of 0.5 to 5 MPa for 30 to 100 seconds.

[0036] Step 5, after cooling, the hemp fiber reinforced polyurethane composite board is obtained.

[0037] Step 6: Cutting the hemp fiber reinforced polyurethane composite board to obtain hemp fiber reinforced polyurethane composite boards of the same size.

Embodiment 3

[0039] Step 1, laying finely opened hemp fiber felt on the hemp fiber composite board;

[0040] Step 2: Spray polyurethane on the hemp fiber felt to obtain a core layer; the polyurethane is made of rigid polyurethane foam material, and the mass ratio of hemp fiber to polyurethane is: hemp fiber 50%, polyurethane 50%.

[0041] Step 3, laying a layer of hemp fiber composite board on the core layer;

[0042] Step 4, then hot pressing at 120°C to 140°C and a pressure of 0.5 to 5 MPa for 30 to 100 seconds.

[0043] Step 5, after cooling, the hemp fiber reinforced polyurethane composite board is obtained.

[0044] Step 6: Cutting the hemp fiber reinforced polyurethane composite board to obtain hemp fiber reinforced polyurethane composite boards of the same size.

[0045] The finely opened hemp fiber felt of the above embodiments is obtained through fine opening of hemp fibers of 80 to 100 mm.

[0046] Effect verification

[0047] According to the content of filling hemp fiber, t...

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Abstract

The invention provides a fibrilia enhanced polyurethane composite board and a preparation method thereof, and belongs to the field of automobile material design and manufacturing. The composite board is of a structure formed by clamping a core layer by two panel layers; the core layer is formed by opened fibrilia used as a framework and foaming polyurethane used for filling framework gaps. The preparation method comprises the following steps: firstly, laying a refinedly opened fibrilia felt on one panel layer; then, spraying the polyurethane on the fibrilia felt; next, laying the other panel layer on the polyurethane; then, heating, shaping and cooling to obtain a product. The fibrilia enhanced multilayered-structure composite board prepared by the invention has the advantages that the environment-friendly performance is good; the weight is light; the rigidity and intensity are high; the energy absorption performance is good; the purposes are wide. The fibrilia enhanced polyurethane composite board can be widely applied to the fields of automobiles, rail vehicles, aerospace, building, decoration, packaging and the like. The application prospects are good, and the fibrilia enhanced polyurethane composite board belongs to a light-weight multifunctional environment-friendly fibrilia composite material.

Description

technical field [0001] The invention belongs to the field of automobile material design and manufacture. Background technique [0002] With the progress of society, people's demand for environmental protection, energy saving and material saving is constantly increasing, and the requirements for materials for automobiles and automobile interior parts are also getting higher and higher, and the market competition is fierce. Lightweight is the trend of automobile development, so the application of lightweight materials in automobiles will become more and more common. As an organic material, hemp fiber has good performance and is environmentally friendly. The common hemp fiber composite panels are composed of filling materials directly between the panels. This type of hemp fiber composite board does not have sufficient rigidity and strength in terms of mechanical properties. Contents of the invention [0003] Aiming at the problem of insufficient mechanical properties of th...

Claims

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Application Information

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IPC IPC(8): B32B9/02B32B9/04B32B27/02B32B27/34B32B19/06B32B17/02B32B37/06B32B37/10
CPCB32B5/26B32B37/065B32B37/10B32B2260/021B32B2260/046B32B2262/0261B32B2262/065B32B2262/10B32B2262/101B32B2262/106B32B2457/10B32B2605/08B32B2605/12B32B2605/18
Inventor 刘雪强蒋剡李志刚潘国立于化峰
Owner CHANGCHUN BOCHAO AUTOMOTIVE PARTS CO LTD
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