Polyurethane foaming, how to clean polyurethane foaming

What about expanded polystyrene? This question cannot be generalized and should be analyzed according to your specific situation. Here is a brief introduction to the uses of expanded polystyrene for your reference.

Expanded polystyrene has the advantages of low relative density (low thermal conductivity, low water absorption, shock and vibration resistance, heat insulation, sound insulation, moisture resistance, vibration damping, excellent dielectric properties, etc.), and is widely used in mechanical equipment, instrumentation, household appliances, handicrafts and other shockproof packaging materials for vulnerable and valuable products, as well as the packaging of fast food. If you want to know more about expanded polystyrene, you can consult Hangzhou Fangyuan Plastic Machinery Co., Ltd., thank you!

The question you're asking is more complicated. Generally speaking, you can get more detailed information from the raw material suppliers. The generation rate of exhaust gas is very small, generally considered to be about 3%, the total amount.

During the polyurethane foaming process, foaming agent volatilization and carbon dioxide will be generated. It's not a smell, and it's not easy to collect.

It's just that the different types of blowing agents have different degrees of damage to the ozone layer in the atmosphere and the degree of the greenhouse effect.

And I'm doing this, and the specification value of our unit laboratory is generally four percent of the gas spillage, and if it's a measure, it's best to exhaust the air and bring activated carbon gas masks.

Summary. 1. Toluene is an organic compound with the same optical activity as polyurethane foam. According to the basic principle of similar miscibility, the effect can be achieved.

Some people say that motor gasoline is also feasible, and the basic principle is the same. Why not give it a try? 2. After removing the polyurethane styrofoam with a blade, cut or scrape off the detachable part with a knife.

If it gets on your clothes, let it dry in the sun for a few days, and then rub it with your hands after a few days. The foam glue will gradually change color and delaminate under strong ultraviolet light. But polyurethane styrofoam can still leave dirt on clothes.

1. Toluene is an organic compound with the same optical activity, just like referin polyurethane foam. According to the basic principle of similar miscibility, the effect can be achieved. Some people say that motor gasoline is also feasible, and the basic principle is the same.

Why not give it a try? 2. After removing the polyurethane styrofoam with a blade, cut or scrape off the detachable part with a knife. If it gets on your clothes, let it dry in the sun for a few days, and then rub it with your hands after a few days.

The foam glue will gradually change color and delaminate under strong ultraviolet light. But polyurethane styrofoam can still leave dirt on clothes.

3. Remove polyurethane styrofoam with cleaning agent The basic water cleaning method cannot be cleaned, and it must be cleaned with special detergents. 4. Clean the polyurethane foam with clean water and have strong adhesion to the **, clothes and pants. Work clothes should be worn during construction.

If you stick it to your clothes, it's hard to clean it up. Clothes and pants are damaged, once they come into contact with **, immediately rinse with a large amount of cold water; If sprayed into the eyes, wash with cold water and go to the hospital quickly.

5. Use acetone to clean because this material and the transport and excavation styrofoam are both organic substances, such as punching, and the same type of substance has the characteristics of rubber nucleus, so the styrofoam can be dissolved. In the same way, it is also possible to use gasoline.

Summary. 1. Polyurethane foam caulk, high temperature, will flow, poor stability. The performance is not as stable as polyurethane rigid foam.

Hello, what are the advantages and disadvantages of polyurethane foam, you can refer to the following <>

Pros:1Good thermal insulation performance. The thermal conductivity is about about it, which is better than polystyrene board, and it is the material with better building insulation at present.

2.Good waterproof performance. The foam pores are closed, with a sealing rate of 95%.

3.Due to on-site spraying, an integral waterproof layer is formed, and there are no seams, which is beyond the reach of any polymer membrane, reducing the maintenance workload.

4.Good adhesion performance. It can bond very firmly with wood, metal, masonry, glass and other materials, and is not afraid of strong winds.

Disadvantages: 1. Polyurethane foam caulk, high temperature, will flow, poor stability. The performance is not as stable as polyurethane rigid foam.

2. Polyurethane foam caulk, the foaming speed is too slow, large-area construction can not be carried out, the flatness cannot be controlled, and the quality of the foam is too poor.

3. Polyurethane foam caulk, **expensive.

Kiss and make a reference Ha <>

Hello, glad to answer for you. Hot foaming --- hot foaming refers to a foaming process in which the mold is completed in the processing furnace (the temperature in the furnace is generally 220 to 250, and the first point is 180) after the pouring is completed. The foam produced by thermal foaming to produce hail potatoes has the advantages of low density, good heat aging performance, and low mold cost, but the source of the technology has the disadvantages of large energy consumption, more "mushroom heads" produced by exhaust holes on the mold, and more waste of raw materials.

At present, it is more used in some European OEMs, and is rarely used by domestic OEMs. The temperature of the cold foaming --- cold foaming mold is colder than that of the hot foaming mold (the temperature of the cold foaming mold is 50 -70), and the reaction process of foaming is consistent with that of hot foaming, but the mold does not need to be placed in the processing furnace for reaction, and the mold is added to the rough heat by hot water or electricity (the mold temperature is 50 -70). The cost of the mold is higher, the energy consumption is lower, and the raw material is not wasted.

At present, domestic OEMs basically use this process.

Summary. 1) Polyether components, distilled and purified to remove water.

2) Polyether components, add water scavengers, there are many types.

3) Polyether components, choose a good catalyst, such as lead, the catalytic effect can reach the catalytic hydroxyl group, which is faster than the reaction speed of catalytic water.

4) If it is paint, pay attention to the substrate treatment, environmental humidity.

5) If it is pouring, the temperature should be controlled.

6) If it is foaming, it is necessary to choose the appropriate and reasonable amount of foaming agent.

How can I inhibit the foaming of polyurethane?

1) Polyether components, purified by distillation, to remove water 2) Polyether components, add water remover, there are many types. 3) Polyether components, choose a good catalyst, such as lead, the catalytic effect to achieve a catalytic hydroxyl group is faster than the reaction speed of the catalytic water. 4) If it is paint, it should be injected or treated with the substrate, and the ambient humidity 5) If it is poured, the temperature should be controlled.

6) If it is foaming, it is necessary to choose the appropriate and reasonable amount of foaming agent.

Is there any diluent that does not contain water.

Van Lishui thinner.

Polyether or polyester polyol (white material) and polyisocyanate (black material), water, catalyst, surfactant, foaming agent, other additives and other raw materials are added in one step, mixed under high-speed stirring, and then foamed.

The one-step foaming process is the commonly used sail reed process. There is also the manual foaming method, which is the easiest way to accurately weigh all the raw materials, place them in a container, and then immediately mix them evenly and inject them into the mold or space where the foam needs to be filled. Note:

When weighing, be sure to weigh the polyisocyanate (black material) last.

Polyurethane rigid foam is generally foamed at room temperature, and the molding process is relatively simple. According to the degree of mechanization of construction, it can be divided into manual foaming and mechanical foaming; According to the pressure during foaming, it can be divided into high-pressure foaming and low-pressure foaming; According to the molding method, it can be divided into pouring foaming and spraying foaming.