Environmental Requirements For Polyurethane Spraying Machine

Environmental Requirements For Polyurethane Spraying Machine (Take flexible polyurethane foam inner wall insulation as an example)

The thermal insulation process of spraying all-water polyurethane soft foam inner wall adopts on-site foaming technology. The construction site has certain requirements for the external environment such as temperature, humidity, ventilation, etc., and the following aspects need to be noted:

Temperature factor: When spraying, the on-site ambient temperature and the surface temperature range of the substrate to be sprayed should be above 0 ℃. If the temperature is too low, the adhesion between the polyester foam and the substrate will be reduced, and the foaming speed of the sprayed soft foam will be slow. The yield is low.

Substrate surface factors:Polyurethane flexible foam is a polymer product produced by the mixed reaction of isocyanate and combined polyether two-component. The isocyanate component easily reacts with water to form urea. If the urea bond content in polyurethane increases, the foam will become brittle and the foam The adhesion to the substrate is reduced.Therefore, the surface of the substrate to be sprayed is required to be clean and dry, free of rust, dust, pollution and moisture.If there is dew or frost, it should be removed and dried.

To prevent contact with isocyanates, appropriate personal protective equipment, including chemically impermeable gloves, boots, aprons, and goggles, is also required for everyone in the work area.

Only use the device in a well-ventilated area. If the indoor ventilation is not smooth, it should be forced.

The compressed air provided by the air compressor should be clean.

Eliminate all ignition sources; such as indicator lights, cigarettes; plastic drop cloths, and portable electric lamps.

Keep work area free of debris, including solvent, rags and gasoline.

Ground all equipment in the work area.

The above are the environmental requirements for the use of polyurethane spraying machine.