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Many people don’t know enough about water-based paints and think that water-based paints are not as good as traditional oil-based paints.
In fact, this is a big misunderstanding.
Water-based paints are not only much better than traditional paints in terms of environmental protection, but also in terms of performance.
Focus, yellowing resistance, water resistance, etc.
, are also better than traditional oil-based paint.
Questions about water-based paint are cracked: 1.
What is the adhesion of water-based paint? The adhesion is better than oil-based paint (not including inferior water-based paint), it dries quickly at room temperature, and has excellent anti-rust, anti-corrosion properties and excellent weather resistance.
2.
Why is water-based paint more resistant to yellowing than paint? Because water-based paint film does not contain yellowing substances, while oily nitro contains a lot of nitrocellulose, PU contains a lot of TDI and other easy-yellowing substances.
3.
Does the water-based paint have good flexibility? The softness of the water-based paint is unmatched by the paint, because the water-based paint film is almost pure resin cross-linked, and the nitro group contains a lot of nitrocellulose, and the PU contains a lot of extreme TDI with fragile links.
4.
Will water-based paint cause wood cracking? No, in a sense, it is easy to achieve a certain anti-cracking function.
Wood has hydrophilic characteristics.
Nano-level water-based resin can penetrate into the material to a certain depth with the wood pipe.
After drying and curing, these infiltrated resins can bond the wood fibers well, and should play a role in slowing down the cracking of the wood, not a water-based paint.
Painted furniture will be more prone to cracking.
5.
Will water-based paint increase the moisture content of wood? No, the specific instructions are as follows: (1) Calculation of wood moisture content and wood moisture content: Calculate with a piece of solid wood with a thickness of 1M*1M and a thickness of 1CM.
The moisture content during processing is 12% (the moisture content is the weight of the moisture in the wood, and the percentage of the weight of the wood after it is absolutely dry).
(2) Water content after wood coating with water-based paint: The theoretical calculation is as follows, based on the water-based paint solid content of 40% (that is, 60% of which is water), manual spraying volume 10㎡/kg and spraying utilization rate 40% (maximum) , Equal to the amount of water sprayed on the wood is 24g/m2.
During the natural drying process after spraying, about 50% of the water will volatilize to the outside, and finally the wood's moisture adsorption capacity is about 12g/m2.
(3) Once the wood is sealed by the first layer of coating film, the water sprayed on the second layer cannot get in unless the first layer of primer is not waterproof.
(4) The actual water absorption of the front surface of the wood is very poor, and the water enters the wood mainly at the ends.
If the ends are closed as early as possible in the furniture manufacturing process, the moisture content of the wood is more difficult to change.
6.
What is the hardness of the water-based paint? The single-component hardness is HB～1H, which is equivalent to nitrocellulose paint; the two-component hardness is 1～2H, which is similar to PU paint.
7.
How is the sealing of the water-based paint? Very good.
When the water-based paint becomes a stable film, the resin that penetrates the wood fiber and the resin on the surface will be densely cross-linked, and will not be cracked due to the peristaltic movement of the wood.
Better sealing performance than oil-based paint.
8.
Is the water-based paint resistant to boiling water at 100°C? The poor ones are not resistant to cold water, which will cause white shadows, bubbling or infiltration, etc.
The good water-based paints are resistant to hot water and do not react.
9.
What is the acid and alkali resistance of water-based paint? It can pass the national standard test like oil-based paint, and some items are better than oil-based paint, such as alcohol resistance.
10.
Can water-based paint achieve the gloss of oil-based paint? The gloss is less than one point.
For example, a single-component water-based paint can achieve 8 points of gloss, and a two-component paint can achieve 9 points of gloss, but matte can be duller than paint.
11.
What is the weather resistance and new resistance of water-based paint? It is much better than paint, about twice as much.
Because water-based paint has different resin cross-linking methods, when used in outdoor painting, water-based paint has more obvious advantages than paint.
12.
Does the water-based paint have stronger permeability to wood? Yes, wood is hydrophilic, and the resin of the water-based paint can easily penetrate into the wood and bind the wood fibers, which will help the wood to resist cracking.
13.
Can water-based paint have the clarity of oil-based paint? Yes, of course, it also depends on the clarity and crosslinking density of the resin itself.
Adding powder to the paint will also affect the clarity of the paint film.
14.
How does the VOC of water-based paint compare with the VOC of oil-based paint? Water-based paint uses water as a dispersion medium, and water is volatilized during the spraying and drying process, and VOCs emission is very small.
Solvent-based coatings use organic solvents (thinner with 100% VOCs content) to adjust the paint, and a large amount of VOCs volatilize during the spraying and drying process.
15.
Why is it said that water-based paint film is the most consistent paint film for wood? Because water-based paint film is wrinkle film and oil-based paint is balanced film, water-based paint can better meet the non-stop deformation of wood day and night.
16.
Does the rapid hardness of water-based paints slower than oil-based paints mean that the water runs slowly? No, in fact, after the water-based paints are painted, the water is almost volatilized before packaging, and the rapid hardness is slow because of the water-based plasticizers.
Additives evaporate too slowly, and these additives are much slower than similar oily substances.
17.
Why the water-based paint film is getting harder and harder? Because as some additives volatilize, the water-based resin will become more and more tightly squeezed as it adheres to each other.
Naturally, the hardness of the paint film is getting higher and higher.
18.
Does the abrasion resistance of water-based paint represent the hardness? It does not mean, but it has a certain relationship.
The high hardness can improve the scratch resistance, but the non-abrasion resistance may be related to the quality of the film and the amount of water-based wax added.
19.
Why is there little dust when water-based paint is polished? Because resin has better hydrophilicity than oil-based resin, flying dust can easily absorb moisture in the air and sink.
Therefore, using water-based paint will make the air particularly clean.
20.
Why can't water-based paint be polished with water-based sandpaper? Because water-based sandpaper is mainly used for operations that require water to be polished.
The sand planting method and de-powdering method are also different from dry sandpaper.
It is easy to generate heat when polished, and the water-based paint film itself contains more resin.
, It is more susceptible to heat and plasticization, and the water-based sandpaper has a poor powder removal ability, which makes it easy to stick to the sandpaper.
In short, compared to paint, water-based paint is a new type of environmentally friendly paint, and its environmental principle is to replace the thinner in traditional paint with water.
Compared with traditional paint, the biggest feature of water-based paint is that it uses water as a thinner.
Nearly 50% of it is water that is harmless to the human body and the environment, and does not contain toxic and harmful substances such as benzene, toluene, xylene, formaldehyde, free TDI, and heavy metals.
, Which can minimize the pollution to the natural environment and the harm to human health.
Just because 50% is water, the water-based paint is non-toxic and non-irritating, and can be checked in after painting.
During the construction process, it is non-flammable and non-explosive, and has a high safety factor.
In fact, this is a big misunderstanding.
Water-based paints are not only much better than traditional paints in terms of environmental protection, but also in terms of performance.
Focus, yellowing resistance, water resistance, etc.
, are also better than traditional oil-based paint.
Questions about water-based paint are cracked: 1.
What is the adhesion of water-based paint? The adhesion is better than oil-based paint (not including inferior water-based paint), it dries quickly at room temperature, and has excellent anti-rust, anti-corrosion properties and excellent weather resistance.
2.
Why is water-based paint more resistant to yellowing than paint? Because water-based paint film does not contain yellowing substances, while oily nitro contains a lot of nitrocellulose, PU contains a lot of TDI and other easy-yellowing substances.
3.
Does the water-based paint have good flexibility? The softness of the water-based paint is unmatched by the paint, because the water-based paint film is almost pure resin cross-linked, and the nitro group contains a lot of nitrocellulose, and the PU contains a lot of extreme TDI with fragile links.
4.
Will water-based paint cause wood cracking? No, in a sense, it is easy to achieve a certain anti-cracking function.
Wood has hydrophilic characteristics.
Nano-level water-based resin can penetrate into the material to a certain depth with the wood pipe.
After drying and curing, these infiltrated resins can bond the wood fibers well, and should play a role in slowing down the cracking of the wood, not a water-based paint.
Painted furniture will be more prone to cracking.
5.
Will water-based paint increase the moisture content of wood? No, the specific instructions are as follows: (1) Calculation of wood moisture content and wood moisture content: Calculate with a piece of solid wood with a thickness of 1M*1M and a thickness of 1CM.
The moisture content during processing is 12% (the moisture content is the weight of the moisture in the wood, and the percentage of the weight of the wood after it is absolutely dry).
(2) Water content after wood coating with water-based paint: The theoretical calculation is as follows, based on the water-based paint solid content of 40% (that is, 60% of which is water), manual spraying volume 10㎡/kg and spraying utilization rate 40% (maximum) , Equal to the amount of water sprayed on the wood is 24g/m2.
During the natural drying process after spraying, about 50% of the water will volatilize to the outside, and finally the wood's moisture adsorption capacity is about 12g/m2.
(3) Once the wood is sealed by the first layer of coating film, the water sprayed on the second layer cannot get in unless the first layer of primer is not waterproof.
(4) The actual water absorption of the front surface of the wood is very poor, and the water enters the wood mainly at the ends.
If the ends are closed as early as possible in the furniture manufacturing process, the moisture content of the wood is more difficult to change.
6.
What is the hardness of the water-based paint? The single-component hardness is HB～1H, which is equivalent to nitrocellulose paint; the two-component hardness is 1～2H, which is similar to PU paint.
7.
How is the sealing of the water-based paint? Very good.
When the water-based paint becomes a stable film, the resin that penetrates the wood fiber and the resin on the surface will be densely cross-linked, and will not be cracked due to the peristaltic movement of the wood.
Better sealing performance than oil-based paint.
8.
Is the water-based paint resistant to boiling water at 100°C? The poor ones are not resistant to cold water, which will cause white shadows, bubbling or infiltration, etc.
The good water-based paints are resistant to hot water and do not react.
9.
What is the acid and alkali resistance of water-based paint? It can pass the national standard test like oil-based paint, and some items are better than oil-based paint, such as alcohol resistance.
10.
Can water-based paint achieve the gloss of oil-based paint? The gloss is less than one point.
For example, a single-component water-based paint can achieve 8 points of gloss, and a two-component paint can achieve 9 points of gloss, but matte can be duller than paint.
11.
What is the weather resistance and new resistance of water-based paint? It is much better than paint, about twice as much.
Because water-based paint has different resin cross-linking methods, when used in outdoor painting, water-based paint has more obvious advantages than paint.
12.
Does the water-based paint have stronger permeability to wood? Yes, wood is hydrophilic, and the resin of the water-based paint can easily penetrate into the wood and bind the wood fibers, which will help the wood to resist cracking.
13.
Can water-based paint have the clarity of oil-based paint? Yes, of course, it also depends on the clarity and crosslinking density of the resin itself.
Adding powder to the paint will also affect the clarity of the paint film.
14.
How does the VOC of water-based paint compare with the VOC of oil-based paint? Water-based paint uses water as a dispersion medium, and water is volatilized during the spraying and drying process, and VOCs emission is very small.
Solvent-based coatings use organic solvents (thinner with 100% VOCs content) to adjust the paint, and a large amount of VOCs volatilize during the spraying and drying process.
15.
Why is it said that water-based paint film is the most consistent paint film for wood? Because water-based paint film is wrinkle film and oil-based paint is balanced film, water-based paint can better meet the non-stop deformation of wood day and night.
16.
Does the rapid hardness of water-based paints slower than oil-based paints mean that the water runs slowly? No, in fact, after the water-based paints are painted, the water is almost volatilized before packaging, and the rapid hardness is slow because of the water-based plasticizers.
Additives evaporate too slowly, and these additives are much slower than similar oily substances.
17.
Why the water-based paint film is getting harder and harder? Because as some additives volatilize, the water-based resin will become more and more tightly squeezed as it adheres to each other.
Naturally, the hardness of the paint film is getting higher and higher.
18.
Does the abrasion resistance of water-based paint represent the hardness? It does not mean, but it has a certain relationship.
The high hardness can improve the scratch resistance, but the non-abrasion resistance may be related to the quality of the film and the amount of water-based wax added.
19.
Why is there little dust when water-based paint is polished? Because resin has better hydrophilicity than oil-based resin, flying dust can easily absorb moisture in the air and sink.
Therefore, using water-based paint will make the air particularly clean.
20.
Why can't water-based paint be polished with water-based sandpaper? Because water-based sandpaper is mainly used for operations that require water to be polished.
The sand planting method and de-powdering method are also different from dry sandpaper.
It is easy to generate heat when polished, and the water-based paint film itself contains more resin.
, It is more susceptible to heat and plasticization, and the water-based sandpaper has a poor powder removal ability, which makes it easy to stick to the sandpaper.
In short, compared to paint, water-based paint is a new type of environmentally friendly paint, and its environmental principle is to replace the thinner in traditional paint with water.
Compared with traditional paint, the biggest feature of water-based paint is that it uses water as a thinner.
Nearly 50% of it is water that is harmless to the human body and the environment, and does not contain toxic and harmful substances such as benzene, toluene, xylene, formaldehyde, free TDI, and heavy metals.
, Which can minimize the pollution to the natural environment and the harm to human health.
Just because 50% is water, the water-based paint is non-toxic and non-irritating, and can be checked in after painting.
During the construction process, it is non-flammable and non-explosive, and has a high safety factor.
