Production method for diatom-base functional polyurethane foam composite

Abstract

A production method for a diatom-base functional polyurethane foam composite is characterized by including steps: firstly, preparing raw materials including polyisocyanate 145, polyether polyalcohol, catalyst or foam stabilizer 100, cyclopentane foaming agent 11.5 and diatom healthy daily article filler 20; secondly, mixing the raw materials and injecting the mixture into a foaming mould, wherein the temperature of foaming stock solution is controlled within 18-25 DEG C during injection; and thirdly, foaming to obtain the functional polyurethane foam composite under the conditions that the temperature of the mould ranges from 35 DEG C to 45 DEG C, the temperature of a preheating furnace is 35-50 DEG C, the temperature of a foaming furnace is 35-55 DEG C, the injection pressure is 13-16MPa, and the curing time is equal to or larger than 6min. The characteristics of moisture adsorption and release and emission of negative oxygen ions and far infrared rays of the diatom healthy daily article filler are combined with the polyurethane foaming technique to enable polyurethane foams to be functional and turned into a novel environmental foaming material, and the technical process is environment-friendly.

Description

technical field [0001] The invention belongs to a production method of a foamed composite material, in particular to a production method of a diatom-based functional polyurethane foamed composite material. Background technique [0002] Diatomite is an important non-metallic material with special physical and chemical properties such as light weight, soft quality, porous, heat and acid resistance, large specific surface area, and stable chemical properties. Its chemical composition is mainly SiO2, and its mineral composition is protein and its variants. . Diatomite generally has a density of 1.9-2.35g / cm3, a relative density of 0.4-0.9, a Mohs hardness of 1-1.5 (diatom skeleton particles are 4.5-5 microns), and a porosity of 80-90%, which can absorb its own mass. 1.5-4 times of water, the melting point is 1650-1750 degrees, high chemical stability, low refractive index, high liquid adsorption capacity, large surface area and moderate friction performance, low conductivity to...

AI Technical Summary

Problems solved by technology

[0004] Commonly used for bedding such as pillows and quilts, chair cushions, pillows and other fillers are just ordinary polyurethane foam materials, which are not functional and have no effect on improving the living environment.