There are so many doorways in styrofoam! !

Styrofoam is mainly used for filling, sealing and bonding of joints and windows, joint expansion joints and holes. It is a polyurethane elastic sealing foam material that relies on moisture curing. It is divided into two types: gun type and tube type. The gun type requires a special polyurethane foaming gun to be used, and the tube type is equipped with a disposable hose. It is a one-component, moisture-curing, multi-purpose polyurethane foam filled elastomeric sealing material.

With the understanding of styrofoam, styrofoam has been widely used in construction, decoration and real estate industries. Due to the huge market of styrofoam, styrofoam manufacturers have also sprung up, resulting in a mixed market of styrofoam, which is mixed with good and false styrofoam. The so-called "fake" styrofoam is a way for some unscrupulous manufacturers to reduce the cost by adding inferior materials to deceive and deceive consumers to obtain ultra-high profits.

The quality of the products on the market today is mixed. Today, Xiaobian teaches you how to distinguish the styrofoam. First of all, let's summarize what are the products with poor quality on the market today.

1, add powder

In order to reduce the cost, some manufacturers add low-cost powder to the styrofoam, which will not affect the use of the product, but there will be quality problems such as greatly reduced foaming, clogging of the valve, and shortened shelf life.

2, Gaza

In order to increase the weight of the product, some manufacturers add sand to the product to make it happen. If the product is not clean, there is still something in the jar, most likely it is doped with sand.

3, come on

This product will wick out grease at the bottom after foaming.

This kind of powdered, sanded, refueled, styrofoam of various additives is to deceive consumers and disrupt the market in order to reduce costs. So how can our consumption distinguish the quality of styrofoam?

The following small series will teach you a few tricks, how to distinguish "true and false" styrofoam.

Looking at the size of the foam, the good foam is full and round; the poor foam is small and collapses.

Cut the foam and look at the cells. The cells are evenly and finely packed into a good foam. For example, the cells are large and the density is not good.

Look at the adhesion, good foam adhesion, poor adhesion is poor.

Gun type, when foaming, the foam that is sprayed, can not be too thin and not too thick, too thin foam does not collapse, too thick foam to dry, foam easily shrink.

Squeeze the foam block by hand, and the good size of the glue is good. It is elastic after being fully cured, and it is not good at both hardness and hardness.

Judging from the color. The high-quality styrofoam is milky white after it is printed. The color is white or yellow is not very good.

After the product is used up, shake the tank, and the good product will not be unclean.

Styrofoam knowledge

When the temperature is low in winter, the colloidal solidification speed becomes slow due to the low temperature and humidity, and the brittle phenomenon occurs during the curing process. In severe cases, even the powdering occurs.

To solve such problems, we need to start from the following aspects:

1 The tank is soaked in warm water (30 ° C ~ 50 ° C) for a while before use;

2 Before and after construction, spray water mist on the surface of the substrate and the surface of the gel;

3 foaming rubber formula is also adjusted with seasonal changes, the use of winter-type products will effectively improve the use of low temperature;

4 If the ambient temperature is lower than -5 °C, it is not recommended to construct, or special measures are taken to construct it later;

5 choose a large manufacturer brand, more trustworthy.

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