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Composite material with polyurethane foam coated with plant fibers as well as preparation method and application thereof

A technology of polyurethane foam and plant fiber, which is applied in the field of composite materials, can solve the problems of limited use and high water absorption, and achieve the effects of avoiding painting, low hygroscopicity, and excellent corrosion resistance

Pending Publication Date: 2021-04-13
江苏集萃复合材料装备研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high water absorption of the doped wood material severely limits its use in outdoor seating

Method used

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  • Composite material with polyurethane foam coated with plant fibers as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of the composite material of described plant fiber coating polyurethane foam, described preparation method comprises the steps:

[0035] (1) cutting the polyurethane rigid foam into a width and height size of 140mm × 40mm to obtain a polyurethane rigid foam core;

[0036] (2) The flax fibers are arranged by the rotating mandrel through the yarn arrangement system, and the plant fibers are drawn out from the outer wall of the bobbin, so that the flax fiber bundles are arranged in parallel, and the thickness of a single layer is 2 mm;

[0037] (3) Through the traction of the power system, the flax fiber and polyurethane rigid foam core material processed in step (2) are continuously fed into the starting end of the production line, and then passed through the dipping tank, guiding mold, and heating mold in turn at the end of the production line Carry out cutting, make the composite material that polyurethane rigid foam periphery coats flax fib...

Embodiment 2

[0041] A kind of preparation method of the composite material of described plant fiber coating polyurethane foam, described preparation method comprises the steps:

[0042] (1) cutting the polyurethane rigid foam into a width and height size of 140mm × 40mm to obtain a polyurethane rigid foam core;

[0043] (2) The flax fibers are arranged by the rotating mandrel through the yarn arrangement system, and the plant fibers are drawn out from the outer wall of the bobbin, so that the flax fiber bundles are arranged in parallel, and the thickness of a single layer is 2 mm;

[0044] The flax fiber has been pretreated. The pretreatment method is as follows: wash and dry the flax fiber, then alkalize it in 3% NaOH solution for 1 hour, then wash it, and then activate it in 3% cetyltrimethylammonium chloride. react in the solvent solution for 1 h.

[0045] (3) Through the traction of the power system, the flax fiber and polyurethane rigid foam core material processed in step (2) are co...

Embodiment 3

[0049] A kind of preparation method of the composite material of described plant fiber coating polyurethane foam, described preparation method comprises the steps:

[0050](1) cutting the polyurethane rigid foam into a width and height size of 140mm × 40mm to obtain a polyurethane rigid foam core;

[0051] (2) adopt rotating mandrel to carry out yarn arrangement to sisal fiber by yarn arrangement system, draw plant fiber from the yarn tube outer wall, make sisal fiber bundle arrange in parallel, single-layer thickness is 3mm;

[0052] The sisal fiber has been pretreated. The pretreatment method is as follows: the sisal fiber is washed and dried, then alkalized in 3% NaOH solution for 1h, then washed, and then chlorinated in 3% cetyl trimethyl React in ammonium active agent solution for 1h.

[0053] (3) Through the traction of the power system, the sisal fiber and polyurethane rigid foam core material processed in step (2) are continuously fed into the starting end of the prod...

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Abstract

The invention discloses a composite material with polyurethane foam coated with plant fibers. According to the composite material, polyurethane rigid foam serves as a core material, and resin-based plant fibers serve as an outer coating layer; and a resin system in the resin-based plant fibers is prepared from the following raw materials: a composite initiator which is 2-5% of unsaturated polyester resin and a release agent which is 3-6% of the unsaturated polyester resin, wherein the unsaturated polyester resin serves as a benchmark. The product provided by the invention has the characteristics of low hygroscopicity, high corrosion resistance, high dimensional stability, light weight and continuous production, and also can improve the strength and environmental protection property.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a composite material of plant fiber-coated polyurethane foam, a preparation method and application thereof. Background technique [0002] With the increase of outdoor leisure places, the demand for outdoor seats as a direct carrier of rest behavior has also increased significantly, and they are mostly used in public places such as parks, residential areas, campuses, shopping malls and playgrounds. Outdoor seating brings great convenience to people's lives. [0003] Common outdoor seats mainly include wooden structure, metal structure and plastic wood structure. Among them, the wooden structure has strong hygroscopicity and is easy to be soaked and corrupted by rainwater. Therefore, the wood needs regular maintenance such as painting and painting, and the service life is short and the maintenance cost is high. In addition, the wooden structure has low strength and is...

Claims

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Application Information

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IPC IPC(8): B32B9/02B32B9/04B32B27/40B32B27/04B32B27/36B32B38/08B32B38/00A47C1/14A47C5/00
CPCB32B5/02B32B5/18B32B5/245B32B38/08B32B38/0036B32B38/0004A47C1/14A47C5/00B32B2262/065B32B2266/0278B32B2260/021B32B2260/046B32B2307/714B32B2307/718B32B2307/734
Inventor 付昆昆叶林李宏
Owner 江苏集萃复合材料装备研究所有限公司
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