Analysis of the three major factors of spray foaming for polyurethane foam machine manufacturers
发布时间： 2018-05-07 15:39 Author: Polyurethane foam machine Source: http: //motokone.com
Published: 2018-05-07 15:39
The quality of sprayed polyurethane foam is affected by many factors, among which the three important factors are temperature, wind speed, and the appearance of the substrate. Then let the polyurethane foam machine
manufacturer analyze it for you.
In order to ensure the quality of polyurethane foam spraying, polyurethane foaming machine manufacturers propose to control the temperature of the spraying part and the outer surface temperature of the substrate to degrees Celsius to degrees Celsius. If the spraying temperature is too low, the adhesion between the foam and the substrate will decrease accordingly, and the density of the sprayed product will increase; too high a temperature will consume too much foam, which is not in line with economic standards.
It also has a great impact on the spray wind of polyurethane foam, and generally adheres to the wind speed below. If the wind speed exceeds meters, the heat will be lost, the speed of the foam will be affected, and the appearance of the product will become brittle. Too much wind will blow away the raw materials to be atomized, and will also increase the loss of raw materials, and even cause environmental pollution.
The latter element mentioned by the manufacturers of polyurethane foaming machines is the appearance of the substrate. Polyurethane foam is a two-component mixed reaction product of isocyanate and polyether. Too high urea water and isocyanate reaction polyurethane urea bond content will lead to easy consumption of brittle foam, reduced bonding strength and foam of the substrate, so request the substrate surface to be clean No pollution, no moisture.
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