Polyurethane composite insulation board and preparation method thereof

Abstract

The invention discloses a polyurethane composite insulation board, which consists of a surface layer and an insulating layer, wherein the surface layer is fiber reinforced polyurethane, the density range of the surface layer is between 0.1 and 1.2 g / cm, and the surface layer contains 5 to 50 percent of reinforcing fiber; and the insulating layer is low-density polyurethane, the density range of the insulating layer is between 0.01 and 0.4 g / cm, and the insulating layer contains 5 to 50 percent of reinforcing fiber. A preparation method comprises the following steps: (1) opening an upper mold and a lower mold, evenly laying the polyurethane and glass fiber in a female mold, closing the molds and foaming to manufacture the surface layer; (2) spraying and laying the low-density polyurethane or the fully-mixed reinforcing fiber or the low-density polyurethane of structural polyurethane on the surface layer by adopting special spraying equipment, forming and molding, and manufacturing the insulating layer to form the composite insulation board; and (3) taking out the insulation board. The insulation board has light dead weight, good effect of heat insulation, high strength, difficult deformation, simple manufacturing process and low cost.

Description

Technical field: [0001] The invention relates to the field of building materials, in particular to a polyurethane composite thermal insulation board and a manufacturing method thereof. Background technique: [0002] With the rapid economic development and the increasingly prominent contradiction between energy shortages, energy conservation has become a basic national policy of our country. Among them, building energy consumption is high and energy waste is serious. The country has begun to make a mandatory standard for building energy saving of 50%, and more and more places have begun to implement the mandatory standard of building energy saving of 65%. However, there are various defects in various wall insulation technologies used in the domestic building exterior wall insulation market. At present, my country's wall insulation materials are mainly divided into two categories: polystyrene and polyurethane. [0003] Polystyrene insulation boards have the following disadva...

AI Technical Summary

Problems solved by technology

[0003] Polystyrene insulation boards have the following disadvantages as the commonly used insulation materials: 1. The thermal insulation effect is worse than that of polyurethane; 2. The mechanical properties such as strength are poor and easy to deform; 3. It is easy to be corroded by paint; High temperature resistance, flammability, poor fireproof performance, 5. Poor waterproof performance, once the waterproof layer leaks, the heat preservation function will fail immediately

At present, the polyurethane composite insulation board usually has three layers, the insulation layer, the bonding layer and the inorganic material board, and has the following disadvantages: 1. The inorganic material board makes the insulation board heavy and increases the load on the building; 2. The strength of the insulation layer is low, It is easy to crack and affects the insulation effect of the insulation board; 3. The insulation layer and the inorganic material board need to be bonded, the process is complicated and the production efficiency is low

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