What is membrane adhesive?
What is vacuum adhesive? What do you know about membrane adhesive? Are you familiar with the types of membrane adhesive? Nowadays, due to the increase in the value of wood and the need to use composite and substitute materials, the use of MDF has increased greatly. By and by, producers are starting to use coats to add to the beauty and strength of MDF. One of the coats that is placed on MDF sheets and has many fans is PVC coat. But these PVC coat and especially vacuum coats must be attached to MDF and chipboard sheets with special adhesives. The special adhesive for paste vacuum coat to wooden sheets is called membrane adhesive or vacuum membrane adhesive. The introduction of vacuum membrane adhesive can be considered the beginning of a revolution in the MDF industry. Of course, if you still don’t know what the nature of membranes is and you want to get to know them, don’t miss the article What are membranes?
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To know the latest price of membrane adhesive or to order vacuum membrane adhesive, visit the membrane adhesive page or call Varnasa number 02155246331
Get to know the types of membrane adhesive!
It has been around ten years that the use of MDF sheets, which have been worked on by CNC tools and then placed on them using PVC coating membrane adhesive, has become very common. As we said, the introduction of these adhesives could create a revolution in the MDF industry. These adhesives have also changed by passing time and their quality and ease of use has been increased. The vacuum membrane adhesive that is used for the coating process on MDF is actually produced from a water-based polymer material.
Regarding the variety of membrane adhesive, it should be said that there are two models of membrane adhesive, polyurethane and acrylic adhesives, which can be seen in the market and are used in the MDF wood industry for coating. By passing time and the coating of raw MDF sheets, various membrane adhesives were offered to the market.
One of the features of membrane adhesive is its relative resistance to heat and its non-melting. Of course, the temperature below 75 degrees is our purpose. Polyurethane adhesives (blue base) will be more suitable for use in vacuum presses due to the ease of operation.
Two-component vacuum membrane adhesive (first generation)
The first generation vacuum membrane adhesive was a two-component adhesive that required 90 to 140 degrees temperature, 4 bar pressure and 10 to 15 minutes of time to activate and vacuum. This generation of vacuum adhesives were very expensive. These adhesives also needed a device that could combine the hardener and adhesive homogeneously.
Single component vacuum membrane adhesive (second generation)
Only 5 years were needed to change and improve the vacuum membrane adhesive. The new generation of single-component reactive polyurethane created a new revolution in the vacuum and membrane press industry. These adhesives had isocyanide or capsule hardener, which burst due to temperature and pressure of 0.7 bar and established its transverse bonds with adhesive and PVC. The appearance of these adhesives also made the work of press makers easier because these adhesives required less temperature and pressure to activate. In the past, the amount of adhesive used was 90 to 130 grams per square meter, which was reduced to 60 to 80 grams per square meter with the use of second generation and single component adhesives.
For stick high-glass coating or other types of PVC coating on the surface of MDF with membrane adhesive, it is necessary that the surface of the sheet is well coated with adhesive. When the work surface starts to sparkle, it means you have used the right amount of adhesive. Keep in mind that the edges of the work require more vacuum adhesive. The reason for this is that the edges may separate and spoil the whole work. After this, the adhesive should be left to dry completely, and then the sticky areas should be checked with a UV lamp. In the end, cleaned the excess adhesive with a damp cloth.
Buy membrane adhesive online
On the Varnasa website, we have provided a wide variety of products in the field of PVC coatings, membrane vacuum coating and membrane adhesive. Also, it is possible to order Varnasa membrane adhesive, which is one of the best membrane adhesives available in the Iranian market.
Types of quality in the type of membrane adhesives
Membrane adhesive has various qualities:
· Vacuum adhesive (the same membrane adhesive) which is resistant to heat, does not spread and does not have an annoying smell, which makes vacuumed products usable in closed spaces.
· Simple membrane adhesive is created with a water-based mixture, which is available in the market in two types, one-component and two-component.
· Two-component membrane adhesive is mixed with a substance called iso cyanol (hardener) that increases the thermal resistance of the adhesive.
Pay attention that membrane adhesive is heated inside the press during use. The reason that makes the adhesive stick is the molecules that are on the work surface, for this reason, before each use, shake the adhesive well so that the ingredients inside the adhesive are evenly suspended, as well as the quality of the adhesive, the nozzle of the gun and the wind pressure must be chosen correctly.
Tips about membrane adhesive
After that, we discussed the question of what is membrane adhesive and the types of vacuum membrane adhesive, we are going to give some tips about membrane adhesive and its purchase.
The first and most important thing to pay attention to when buying vacuum membrane adhesives is to read the catalog and familiarize yourself with the properties of the adhesive. Getting enough information about things such as the amount of heat required for catching is one of the tips that reading the catalog will provide you with.
The resistance of adhesive to water and humidity is another thing that must be carefully considered. The lower the amount of moisture absorption by the adhesive, the less damage will be done to the panels.
The time required for assembling and clamping is another point that we should pay attention. These depend on the amount of heat the adhesive needs to activate. An increase in temperature equals spending less time for assembly and clamping.
We recommend that you also visit the article on the best vacuum membrane adhesive that we discussed earlier on Varnasa blog.
Tips for better use of vacuum membrane adhesive
The use of a suitable gun that has specific and appropriate air pressure is one of the things that can increase the quality of work. Also, observing a distance of 35 to 45 cm for spraying is another point that should be kept in view.
As we said, the edges need more adhesive and must be sticked twice. For this purpose, it is better to spray the adhesive twice on the edges of the work at an angle of 45 degrees. Use a smaller amount of adhesive the first time, and after 1 or 2 minutes, sprinkle more adhesive on the edge again.
The important thing about membrane adhesive is that some people think that membrane adhesive is made and supplied in different colors, and this color design is not available in Iran. This issue is completely wrong, and in fact, the membrane adhesive has no coloring and is produced and supplied with only one color (the main color of the membrane adhesive). Also, some even think that the color of membrane adhesive has an effect on its quality, which is essentially wrong.
So, finally, you should pay attention to these points:
· Use a three-stroke pistol and a 1.4 to 1.7 mm nozzle.
· Adjust the air pressure of the pistol to 6 to 7 bar
· The spraying distance is suitable for the working surface of 35 to 45 cm
Spray the edges of the work twice, directly or at an angle of 45 degrees. First, spray a small amount of adhesive and wait for 1 to 2 minutes to make sure it dries. Then, spray the adhesive again and wait 20 to 30 minutes until the adhesive dries completely.
Make sure that the nozzle of the gun used must have a diameter of 1.4 to 1.7 mm to provide a smooth and clean spray. An important point that you must observe while working is that after the adhesive dries,edged and tooled work should be sticked in two steps. The drying measure of the adhesive is different at every point of the surface of the wood and the work. The adhesive is dry when it doesn’t feel wet when you touch it. Consider that membrane adhesives shouldn’t be heated for more than 3000 seconds.If the heating time is more than this amount, many adhesives lose their effect.
To avoid come off and orange peel of the work after the vacuum operation, it is necessary to shake the adhesive well so that all the adhesive is homogeneous.
In the end, we suggest that you don’t miss the article we wrote about the installation of membrane cabinets on Varnasa blog.
Common questions about membrane adhesives
In this section, we answer common questions about membrane adhesive.
Foreign or Iranian membrane is better?
Membrane adhesive is available in various foreign and Iranian models in the Iranian market. Of course, many foreign models are fake. But currently, the quality of imported adhesives is higher than that of domestic production, and we still do not have a well-known brand that can be produced domestically, of course, the quality of domestic production is increasing day to day. We are also currently trying to provide the best quality for our audience by importing Varnasa membrane adhesive, which is made with Bayer Germany raw materials.
How much is membrane adhesive?
The price of membrane adhesive is constantly changing according to the quality, size and packaging and exchange rate fluctuation, but to know the price of membrane adhesive, you can call Varnasa phone number on this page so you can get the latest prices of all types. Let us instruct you about membrane coating and adhesive.
We want to order membrane adhesive. what should we do?
To order membrane adhesive, you can call Varnasa phone number on this page and get your order at the place and time you want.
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