How to solve the skin bubbles and cloth bubbles generated in the rubber production process

The defoamer for polyurethane waterproof coating is a silicone-free composite defoamer that is suitable for eliminating the foam of ethylene propylene latex, pure propylene latex, styrene acrylic latex, vinyl acetate latex and other systems due to its presence in various good defoaming ingredients.

The picture shows the paint. Causes of blistering.

1) Small surface tension;

2) the presence of surfactants;

3) There is a gap on the substrate to be sprayed;

4) Large surface viscosity;

5) Improper use of sprays, brushes, rollers, etc. during the construction process;

Benefits of using defoamers for polyurethane waterproofing coatings.

1. Prevent the impact on the quality of the coating.

There will definitely be a lot of bubbles in the production process of the coating, and this will easily affect the overall delicacy of the coating, and it will also have a great impact on its quality, so by using the paint defoamer, you can achieve a better defoaming effect, prevent the impact on the production and processing quality of the coating, and make its use advantages more comprehensive, and the loss capacity is very strong, bringing a more convenient and convenient use experience.

The picture shows the paint blistering.

2. The consumption sustainability is very good.

The defoamer for polyurethane waterproof coating can have good sustainability, and the stability and functionality will be very strong, the affinity is relatively good, but it is not easy to form shrinkage holes and fisheyes, which can meet a variety of requirements in the use process, and can also prevent the occurrence of environmental hazards, so the use process is very safe, and will not cause any harm and impact to the workers, which will naturally bring better use results.

How it works. The defoamer for polyurethane waterproof coating reduces the surface tension and causes the thin layer to break, or forms a monomolecular film, which reduces its adhesion and is easy to crack the thin layer; The hydrophobic particles in the defoamer reach the surface layer of the thin layer and adsorb the surfactant on top of the thin layer, causing the thin layer to break due to the absence of surfactant.

The main reasons for BAI are:

1. The problem of materials, rubber glue materials to mix, store, and make the process of DAO use have moisture, and the internal moisture is not eliminated, resulting in bubbles, and moisture due to changes in the capacity or weather.

Most of the reasons may be that there is a problem with the raw material, we have had a similar situation before, it would be good to change to another batch of material;

2. Improper setting or blockage of the mold exhaust hole will also produce bubbles, and the exhaust is not properly discharged.

In the process of mixing, the material and the air enter the mold together, if the mold does not add an exhaust groove or there is no exhaust process in the processing, the air is easy to be trapped in the mold, so that the product produces bubbles or pores.

3. The production of rubber products, there are bubbles after vulcanization, which may be a problem in the rubber formula, and you can find a technician to adjust the formula.

Defoamers for rubber products can be eliminated as long as they are used correctly.

Why does rubber blister?

1. The rubber operator is not standardized, the mixing is uneven, the rubber film is not standardized, and the environment is unhygienic.

2. The material has moisture (add some calcium oxide during mixing).

3. The vulcanization is not sufficient, it looks like there are bubbles when it is not cooked, the vulcanization pressure is insufficient, there are many impurities in the vulcanizing agent, the impurities of small molecules become decomposed in advance, the bubbles are left, and the exhaust gas in the vulcanization process in the product is not discharged well.

4. The exhaust design of the mold itself is unreasonable, and the gas cannot be discharged in time when the rubber is punched!

5. If the rubber material is too small and the product is too thick, the heat transfer of the rubber will become slow, and after the vulcanization of the appearance, the fluidity of the rubber will also decrease, resulting in a shortage of materials, and bubbles may be generated.

The use of rubber product defoamer can solve the problem of rubber foaming, and it will not affect the quality of rubber after use, and only a small amount can be added to eliminate foam, which is not only convenient but also cost-saving.

There are many reasons for the foaming of rubber products, such as improper operation, external environmental influence, material moisture is not removed, too many impurities, and unreasonable equipment design may cause foaming. Defoamer for rubber products, it can eliminate the effect of removing foam.

The reasons for the blistering of rubber products are:

1. The viscosity of rubber is very large, and it is easy to bubble when air is mixed when stirring;

2. Improper setting of the mold exhaust hole or blockage will also produce bubbles;

3. The incorrect proportion of rubber formula will affect the formation of bubbles;

Choosing the right rubber product defoamer and using it correctly can effectively eliminate foam.

The main causes of bubbles are as follows:

In the formula of rubber du products, zhi

If the molecular weight of the plasticizer is too small, DAO will vaporize during processing or a.

Edition at a fixed temperature with.

The right rubber produces phase separation to generate volatiles, and then produces foaming;

In the vulcanization reaction, the decomposition of peroxide sulfiding agent will produce volatiles of ketones and alcohols, and produce bubbles;

The by-product of the reaction between zinc oxide and stearic acid is water, which produces bubbles;

Low-viscosity rubber compounds are easy to be caught in gas during the production process and are not easy to exclude, resulting in bubbles.

The scorching time of the rubber material is too short, and the gas is not easy to be discharged after rapid sulfurization, resulting in bubbles;

Vulcanization systems that are too slow to vulcanize can lead to bubbles in rubber products.

The hazards of rubber blistering are:

In foam construction, the paint film leaves bubbles, resulting in uneven surface, which is not only unsightly but also affects the service life of the paint film.

The foam does not easily dissipate in the latex, making further operations difficult.

The air in the foam hinders the dispersion of pigments or fillers, which directly affects the elasticity, strength and elongation of the product.

According to the cause of bubbles in rubber products, we have produced a targeted rubber defoamer for rubber products.

We can add BYK065 defoamer to solve the problem of foaming, and we can also find Dachuan defoamer to help you solve the problem, I hope to help you.