High-strength rigid foam core board and preparation method thereof

A rigid foam, high-strength technology, applied in the field of high-strength rigid foam core board and its preparation, can solve the problem of low nail holding force, and achieve the effect of high nail holding force, good effect and low density

Inactive Publication Date: 2020-08-21
广州粤齐复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Fiber-reinforced polyurethane rigid foam materials are commonly used as reinforcing materials such as glass fiber, carbon fiber, organic fiber, silica, calcium carbonate, etc. Compared with ordinary polyurethane rigid foam materials, the overall strength has been greatly improved, but because its structure is Layered, the strength of each layer and in different directions is different, which ultimately leads to a small nail-holding force of fiber-reinforced polyurethane rigid foam, which limits its application

Method used

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  • High-strength rigid foam core board and preparation method thereof
  • High-strength rigid foam core board and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] A high-strength rigid foam core board, the preparation method of which comprises the following steps:

[0025] 1) Make a forming mold (specification: 100cm×50cm×6cm), and then place the fiber felt (mass per unit area: 40g / m 2 ) is fixed on the bottom and top of the mold, and a three-dimensional fiber skeleton (consisting of mesh glass fibers and three-dimensional crimped nylon fibers; the mass per unit area of ​​mesh glass fibers is 120g / m 2 , the mesh size is 4mm×4mm);

[0026] 2) The polyurethane base material and n-pentane were mixed evenly according to the mass ratio of 1:0.005, then injected into the molding mold, closed, and foamed at 40°C for 50 minutes to obtain a high-strength rigid foam core board.

Embodiment 2

[0028] A high-strength rigid foam core board, the preparation method of which comprises the following steps:

[0029] 1) Make a forming mold (specification: 100cm×50cm×6cm), and then place the fiber felt (mass per unit area: 35g / m 2 ) is fixed on the bottom and top of the mold, and a three-dimensional fiber skeleton (consisting of mesh glass fibers and three-dimensional crimped aramid fibers; the mass per unit area of ​​mesh glass fibers is 80g / m 2 , the mesh specification is 6mm×6mm);

[0030] 2) The polyurethane base material and n-pentane were mixed evenly according to the mass ratio of 1:0.008, then injected into the molding mold, closed, and foamed at 60°C for 40 minutes to obtain a high-strength rigid foam core board.

Embodiment 3

[0032] A high-strength rigid foam core board, the preparation method of which comprises the following steps:

[0033] 1) Make a forming mold (specification: 100cm×50cm×3cm), and then place the fiber felt (mass per unit area: 60g / m 2 ) is fixed on the bottom and top of the mold, and a three-dimensional fiber skeleton (consisting of mesh glass fibers and three-dimensional crimped cotton fibers; the mass per unit area of ​​mesh glass fibers is 50g / m 2 , the mesh size is 8mm×8mm);

[0034] 2) The polyurethane base material and n-butane were mixed evenly according to the mass ratio of 1:0.012, and then injected into the molding mold, closed, and foamed at 60°C for 60 minutes to obtain a high-strength rigid foam core board.

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Abstract

The invention discloses a high-strength rigid foam core board and a preparation method thereof. The preparation method of the high-strength rigid foam core board comprises the following steps that (1)a forming mold is manufactured, fiber felts are fixed to the bottom and the top of the mold, and a stereoscopic fiber skeleton is arranged in the mold; and (2) a polyurethane base material and a foaming agent are injected into the forming mold after mixing evenly, and the mold is closed for foam forming. The high-strength rigid foam core board is large in nail holding force, high in strength, less in mass and good in heat preservation and sound insulation effects, the density of a foam layer is small, the preparation process is simple, and the high-strength rigid foam core board can directlyreplace wooden boards, plastic plates and metal plates after being bonded with surface layer materials.

Description

technical field [0001] The invention relates to a high-strength rigid foam core board and a preparation method thereof. Background technique [0002] Foam plastic, also known as microporous plastic, is a plastic material covered with numerous interconnected or disconnected micropores as a whole. It has the characteristics of light weight, heat insulation, sound absorption, and shock absorption. It is usually used for filling, heat preservation, and sound insulation. Material. [0003] Currently, the most common foam material on the market is polyurethane foam. Polyurethane foam has excellent physical and mechanical properties, acoustic properties, electrical properties and chemical resistance, and rigid polyurethane foam has low thermal conductivity. It is a high-quality thermal insulation and cold insulation material. Formability. However, when polyurethane rigid foam is used as a load-bearing structural material, it is required to have more excellent strength, modulus a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/12B29K75/00
CPCB29C44/12B29K2075/00
Inventor 刘雪强赵吉敏吕殿华吕硕
Owner 广州粤齐复合材料有限公司
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