Is styrofoam safe? The foaming principle of styrofoam. Precautions when using styrofoam.

Foam glue is a material used in decoration and plays a key role. So, is styrofoam safe to use? What is the foaming principle of styrofoam? What should we pay attention to when using styrofoam?

Foam glue is a kind of decoration The materials used in it play a very critical role. So, is styrofoam safe to use? What is the foaming principle of styrofoam? What should we pay attention to when using styrofoam?

1. Is styrofoam safe

1. Now Most of the foam used is polyurethane (the main component of paint). Pay attention to ventilation when using it. It is recommended to buy products produced by regular manufacturers and open windows for ventilation after decoration. Polyurethane foam is an environmentally friendly product and a new construction auxiliary material recommended by the country.

2. There will be a certain smell when foaming. The size of the smell depends on the product of the manufacturer you choose. On the one hand, it can also reflect the quality of the product. Good or bad. Cured foam glue can come into contact with food. But because styrofoam is still a chemical, we need to pay more attention when using it.

2. Foaming principle of styrofoam

1 . Foam glue, as the name suggests, is a kind of glue with foaming and bonding properties. It is mainly used for filling, sealing and bonding the side seams, expansion joints and holes of building doors and windows. It is a moisture-cured polyurethane elastic Sealing foam material. Foam rubber is filled with polyurethane prepolymer, foaming agent, catalyst, cross-linking agent, etc. into a high-pressure iron can, and filled with propane and other gases. It is divided into two types: gun type and tube type. The gun type requires a special foam glue gun to use, and the tube type is equipped with a disposable hose.

2. When the material is sprayed from the aerosol can, the foamy polyurethane material will expand rapidly and solidify with the air or the moisture in the touched matrix to form foam. . The cured foam glue has various functions such as caulking, bonding, sealing, heat insulation, and sound insulation. It is an environmentally friendly, energy-saving, and easy-to-use building material. It is suitable for sealing and filling, waterproofing, fixing, bonding, and thermal insulation. Sound insulation, especially suitable for sealing, plugging and waterproofing between plastic steel or aluminum alloy doors, windows and walls.

3. Precautions for using styrofoam

1. Storage precautions

The normal operating temperature of styrofoam cans is+5～+40℃, the maximum temperature The optimal operating temperature is +18~+25℃. Under low temperature conditions, it is recommended to place the foam rubber at a constant temperature of +25~+40℃ for 30 minutes before use to ensure its optimal performance. The temperature resistance range of the cured foam is -35℃～+100℃.

2、Precautions for use

A. Foam glue is a moisture-curing foam. It should be sprayed on a humid surface when used. The greater the humidity, the faster it will cure. Uncured foam can be cleaned with cleaning agents, while cured foam should be removed mechanically (sanding or cutting). The cured foam will turn yellow when exposed to ultraviolet light. It is recommended to use other materials (cement mortar, paint, etc.) to coat the surface of the cured foam. After using the spray gun, please clean it with special cleaning agent immediately.

B. When replacing the material tank, firstShake the new tank well (shake it at least 30 times), remove the empty tank, and quickly replace it with the new tank to prevent the spray gun connection port from solidifying.

C. The flow control valve and trigger of the spray gun can control the foam flow rate. When injection stops, the flow valve is closed clockwise.

3. Safety precautions

Uncured foam is sticky to skin and clothes, please be careful when using it Keep away from skin and clothing. There is5-6kg/cm² (25℃) pressure inside the styrofoam tank, and the temperature should not exceed 50℃ during storage and transportation to prevent tank damage. Exploded styrofoam cans should be kept out of direct sunlight and out of reach of children. Empty cans after use, especially partially used but not yet used styrofoam cans, should not be thrown around. Burning or puncturing empty cans is prohibited. Keep away from open flames and do not come into contact with flammable and explosive items. The construction site should have ventilation conditions, and construction workers should wear work gloves, work clothes and goggles during construction, and do not smoke. If the foam touches your eyes, please rinse with clean water before going to the hospital; if it touches the skin, rinse with clean water and soap.