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What material is polystyrene foam?

What is styrofoam and how to use it?

Polystyrene foam, as its name implies, is an adhesive with foaming and adhesive properties. It is mainly used for filling, sealing and bonding side seams of building doors and windows, expansion joints and holes of components. It is a moisture-cured polyurethane elastic sealing foam material. Polystyrene foam is composed of polyurethane prepolymer, foaming agent, catalyst and crosslinking agent. , packed in high-pressure resistant iron cans, and filled with propane and other gases. It is divided into gun type and tube type. Gun type can only be equipped with special polyurethane foam gun, and tube type can be equipped with disposable hose.

Usage and steps of styrofoam for guns:

(1) take the foaming gun and clean it with polyurethane cleaning agent to ensure smooth flow;

(2) Take the styrofoam again, hold the middle of the tank tightly by hand, and shake it vigorously at least 15-30 times along the transverse direction of the tank to ensure that the prepolymer in the tank is fully mixed;

(3) Remove the protective sheath of the valve on the gun foam rubber thread ring, remove the cleaning agent on the foam gun, and install the foaming agent tank on the foam gun interface along the thread;

(4) Hold the handle of the foaming gun tightly, ensure that the material tank is placed above and the foaming gun is below, and open the flow regulating valve behind the foaming gun;

⑤ Aim the gun head at the bottom or inside of the part to be filled, gently pull the trigger and start the construction. It can be adjusted to the appropriate flow through the flow regulating valve behind the foaming gun.

⑥ After spraying a can, if filling is needed, you can immediately remove the empty can, reload the foaming agent according to the method in point (3), and continue the construction.

⑦ After the construction is completed, dismantle the material tank in time, and replace it with a special cleaning agent to clean the foaming gun, so as to avoid the residual materials from solidifying and blocking and damaging the foaming gun.

Use method and steps of tubular styrofoam:

1, step 2 of the same gun type.

2. Rotate the disposable hose clockwise again;

3. Ensure that the tank is placed above, the foaming gun is under the tank, aim at the bottom or inside of the part to be filled, gently pull the trigger and start the construction.

4. Spray from bottom to top, and the spraying amount is 80% of the required filling amount (the filling amount of the pipe is 2/3).

Use skills

Pay attention to the driving speed when spraying. Usually, the spraying amount is 2/3 of the required filling amount. The vertical gap should be filled from bottom to top; When filling gaps such as ceilings, uncured foam may fall off due to gravity. It is suggested that the foam should be properly supported immediately after filling, and then the support should be removed after the foam is cured and bonded with the seam wall. 10 minutes or so, the foam is degummed, and it can be cut after 60 minutes. Cut off excess foam with a small knife, and then coat the surface with cement mortar, paint or silica gel.

If it helps you, I hope to adopt it!

What are the main raw materials of polyurethane foam rubber?

Polyether polyol (white material), polyisocyanate (black material). Catalyst, fire hydrant, dimethyl ether, propane. Polyurethane foam rubber and other chemical raw materials are synthesized in a certain proportion. Polyurethane foam rubber is a special polyurethane product which combines polyester foam technology with aerosol technology.

What is the material of the computer case foam (this is the one in the picture)? Is this substance harmful to human body? Five points.

Introduction of plastic foam

1. Composition of raw materials

The main raw materials of polystyrene foamed tableware are polystyrene, talcum powder, calcium stearate, butane and so on.

Polystyrene: Its production process is that monomer styrene is polymerized in a sealed reaction kettle under the action of catalyst at high temperature and high pressure. Although styrene is an aromatic compound, its reaction is carried out under sealed oxygen-free conditions, and there is no condition to produce dioxins, which meets the food hygiene and requirements.

Talcum powder: it is an inorganic mineral (magnesium silicate containing crystal water), and its dosage is about 1%, which acts as a nucleating agent and is of medical grade.

Calcium stearate: saturated fatty acid salt, the dosage is about 1%, which acts as a lubricant and is medical grade.

Butane: saturated hydrocarbon, foaming agent. In the past, some production lines used freon as foaming agent. In order to protect the atmospheric ozone layer, with the assistance of the United Nations Multilateral Fund, butane foaming agent was completely used.

There is no harm.

What is the function of styrofoam and where is it generally used?

The sound insulation effect is better than that of mortar, and it is not easy to combine the body with the wall closely, so it should be suitable for the installation and use of windows. The way to fill the gap between them is mainly to fill the gap, which has a certain fixing effect. It is worth noting that. Especially the window frame, the wall belongs to civil engineering, and the foam produced after drying has a little strength, which just fills the gap. Some "roadside builders" will cut corners and fix the window frames directly with foaming agent. Because the materials of wall and window frame are rigid materials, it refers to the transition structure between wall and window. Apply foaming agent to the window frame after installation. Building foaming agent is a kind of polyurethane prepolymer. The so-called foaming agent is a substance that makes the target substance pore-forming, and it should be suitable for fixing on the wall. In construction, the window frame is usually fixed on the wall as required, and then fixed. This installation method. The window frame is fixed on the wall and the window is installed on the window frame. When the window frame is stressed, it will fall off. It has strong adhesion. Some window frames have the function of fixing and preventing the collapse of surrounding solid bodies, and the accuracy is very poor. Fixing must be done in the window frame. Therefore, on some occasions, we must ensure good quality. It can be divided into three categories: chemical foaming agent, physical foaming agent and surfactant. There is no looseness, and the foaming agent, catalyst and other components are all packed in pressure-resistant aerosol cans. When filling the gap, the backpack has some fixed functions. Keep warm. Because the building foaming agent has adhesive force, it has excellent sealing and filling effect.

The difference between styrofoam and foaming agent

Polystyrene foam ~ is a special polyurethane product, which is filled with polyurethane prepolymer, foaming agent, catalyst and other components in pressure-resistant aerosol cans. When the material is ejected from the aerosol can, the foamed polyurethane material will expand rapidly and solidify with the air or moisture in the contact matrix to form foam. The cured foam has many effects, such as caulking, bonding, sealing, heat insulation, sound absorption and so on. It is an environmentally friendly, energy-saving and convenient building material. It can be used for sealing and plugging, joint filling, fixed bonding, heat preservation and sound insulation, and is especially suitable for sealing and plugging and waterproofing between plastic steel or aluminum alloy doors and windows and walls. Styrofoam is also needed to install the finished door cover.

One-component polyurethane foam (commonly known as foaming agent, abbreviated as OCF in English) is the product of the cross combination of aerosol technology and polyurethane foam technology. It is a special polyurethane product filled with polyurethane prepolymer, foaming agent, catalyst and other components in a pressure-resistant aerosol can. When the material is ejected from the aerosol can, the foamed polyurethane material will expand rapidly and solidify with the air or moisture in the contact matrix to form foam. The cured OCF foam has many functions such as caulking, bonding, sealing, heat insulation and sound absorption. It is an environment-friendly, energy-saving and easy-to-use building material, which can be used for caulking sealing, gap filling, fixed bonding, heat preservation and sound insulation, especially for caulking sealing and waterproofing between plastic steel or aluminum alloy doors and windows and walls.

What material is better for installing marble windowsill in home decoration? Is it okay to use styrofoam?

No styrofoam. Generally use professional marble marble marble marble glue.

Marble glue is based on unsaturated polyester resin, which is suitable for bonding between various stones or repairing cracks and broken marks on the surface of stones. It is often used in various stone paving projects and repairing, bonding, positioning and caulking of stones.

Styrofoam, as its name implies, is a kind of foam and adhesive property. It is mainly used for filling, sealing and bonding side seams of building doors and windows, expansion joints and holes of components. It is a moisture-cured polyurethane elastic sealing foam material. Polystyrene foam is composed of polyurethane prepolymer, foaming agent, catalyst and crosslinking agent. , packed in high-pressure resistant iron cans, and filled with propane and other gases. It is divided into gun type and tube type. Gun type can only be equipped with special polyurethane foam gun, and tube type can be equipped with disposable hose.

What is the foaming agent for on-site packaging?

Generally, AB two raw materials react chemically to form a semi-rigid polyurethane with adjustable density and good factory washing effect. You can consult professional manufacturers/Xiamen Huabiao Technology website or customer service.

What is the composition of black and white materials in foamed materials?

The chemical name of black substance is PPG, which is a petrochemical product and is sold in general areas. White material's chemical name is MDI, which is made of many raw materials. So the so-called styrofoam product formula refers to the formula of white material products. The specific ingredients and formula can be asked by the manufacturers who sell the equipment, and they generally have relevant formula technology. For example, Jerry's polyurethane foam filling equipment is available. The address is as follows:

What is the best material for polyurethane foam A? How to tell which material is A? 100 integral

It mainly depends on the foaming amount of styrofoam (good styrofoam will have greater foaming amount), strength and elasticity (elastic connection required for door and window installation, and many styrofoam on the market have poor strength and basically no elasticity), suspension (styrofoam with poor viscosity and suspension will cause great waste, styrofoam will not stick when it hits a gap, and it will be more obvious when the weather gets cold), and cell density (cells with good density also increase the strength of styrofoam).

What materials are commonly used for on-site foaming, and where are they used?

Aluminum alloy splint, high strength, easy processing and light material.