Wood lacquer big bottoming | When water is oily, who is your best choice

With the continuous improvement of people's quality of life, many families tend to make homemade wooden products. To create good furniture with both aesthetic and functional features, wood lacquer is an indispensable tool, but oily wood lacquer has a large odor and contains more odor. Chemical substances that are harmful to the human body often have many safety hazards during use.

In recent years, with the concept of environmental protection deeply rooted in the hearts of the people, a non-toxic and non-volatile water-based paint came into being, which made many consumers happy. It uses water as a solvent, does not contain harmful chemicals such as benzene and toluene, and VOC emissions. The amount is lower, it can be stayed in a short time after painting. Compared with oil paint, the check-in time is greatly reduced. At present, it has been included in the purchase list by many consumers, becoming a strong competitor of oily wood paint.

So, how to choose water-based, oily? In order to help consumers make rational purchase choices, today, the evaluation center will be a comprehensive wood-based paint for everyone. We have chosen a well-respected paint big-name Dulux as the evaluation object. For the oily wood lacquer and waterborne wood lacquer products produced by it, the water-based and oil-based enamel products are better tested. Let's take a look.

First, wood paint appearance display

1, Sen breathing waterborne wood paint series

Duluxi Breathing Bamboo Charcoal Anti-Benzene Anti-Formaldehyde Full-effect Waterborne Wood Coating The front is dark blue and wood color/light white. The design is very consistent with the concept of water-based products. The simple green leaf scene combines the image of Dulux Gushang, which shows the product. The theme of natural environmental protection, varnish shows the clear and clean effect of wood varnish, and the lacquer shows the strong adhesion and strong coverage.

The inside of the tank is listed with very detailed product information including product ingredients, construction points, instructions for use, and also printed with China's environmental certification mark, indicating that the product is not only qualified, but also meets specific requirements during production, use and disposal. Environmental protection requirements.

2, wood decorated oily wood lacquer series

The frontal appearance of the woody oily wood lacquer is a simple style. There is also a familiar image of the ancient shepherd dog, which is very familiar. It is gentle and friendly. The varnish can see the original color of the wood grain. The paint shows the effect after painting, showing the characteristics of each product.

Similarly, the wooden decorative oily wood paint can body is also marked with very detailed instructions on the back. The amount of information is slightly larger than that of water. Because the oil paint needs to be more standardized during use, special warnings have been added. Of course, This series of products has also passed the certification of the China Environmental Labeling Products Certification Committee.

Second, open can experience

Before opening the can, we observed the circumference of the lid and found that the edges of the lids of the two products were neat and the sealing was quite good. It was guaranteed that there would be no leakage during normal transportation, and tools needed to be opened smoothly. Cover; the barrel is made of thick metal material, the editor tries to lift the two paints and shakes hard, and there is no spill of paint.

After smooth opening, we can see that there is no floating or delamination of foreign matter inside the paint. The liquid is fine and uniform, and no obvious particulate matter or suspended powdery substance can be seen. In the can, the waterborne varnish shows a milky white ribbon. The pale yellow state, after being applied to the surface of the wood, it will gradually become transparent as the paint dries. When the paint film dries, it will be converted into a completely transparent trait; while the oil varnish color is more yellowish. .

Third, wood lacquer construction comparison

When constructing the wood lacquer to make the evaluation template, the editor found that there are big differences in the construction process between the water-based paint and the oil-based paint, which are mainly reflected in the following four aspects:

(1) Construction conditions:

Compared with oil paints, water-based paints are safer to store; at the same time, there are no special requirements for water-based paint construction, and it is very convenient to apply and repair them. Oil paint construction is professional, difficult to operate, and difficult to repair, so it is not It is recommended to operate by yourself. At the same time, the oily paint is flammable and explosive, and the poisonous substances are volatilized. The brushed master must wear protective equipment.

(2) use ratio

The water-based paint can be directly diluted with water, and the construction steps are simple and convenient; while the oil paint needs to be mixed by a certain proportion of the main paint, curing agent and thinner, the ratio operation is complicated and has certain professionalism.

(3) Drying speed

Water-based paints are inherently easy to dry. Under the same normal construction conditions, it takes longer to achieve the same drying effect.

(4) Odor concentration

From the opening of the cover to the construction, until the drying is completed, no obvious odor will be produced from the beginning to the end. After the oily paint is dried, there will be some odor and the taste will evaporate for a longer period of time, so the space for painting the oily paint is not It is recommended to stay now.

Fourth, paint film performance test

In the performance test, we will compare the five aspects of the paint film of waterborne and oily wood lacquer, namely: hardness test, adhesion test, scratch resistance test, resistance to daily material erosion test and yellowing resistance test.

Don't look at these terms so professionally, it seems that we are far away from our lives. Actually, these indicators are closely related to the daily life. It is the furniture that can stand the test in different situations in life. In order to ensure the scientificity of the test. More close to the daily life of the consumer, we have optimized the evaluation method of each project with reference to the national standard test method. The following will present the specific evaluation content of the six key indicators of the performance of the wood paint film.

1, hardness test

Wood furniture can be seen everywhere in life. When we are free to move at home, it is inevitable to inadvertently cause different degrees of impact on furniture or other wood products. These resistances will first act on the outermost layer of the furniture film. Not high enough, the paint film can easily be destroyed, affecting the aesthetics and experience of the furniture.

We use a portable pencil hardness tester. The hardness tester is equipped with a set of Zhonghua high-grade drawing pencils of the same batch number, a total of 13 pieces, of which 6H is the hardest and 6B is the softest; the editor is coated with water on both sides of the transparent tempered glass. , oily wood lacquer, by the scratch on the surface of the paint film with a pencil of different hardness to determine the water-based, oily hardness level.

2, adhesion test

The adhesion of the paint film can be understood as the degree of adhesion between the wood paint and the wood, the substrate, and the plate. If the adhesion of the paint film is not good, and the bump or impact is encountered, the damage will be greatly improved, and the attachment will be greatly improved. The layer of 'protective clothing' on the wood will fall off at any time, how can it give the furniture the greatest sense of security?

Edit the test sample plate with unpainted wood, apply water-based and oil-based wood lacquer on both sides. After completely drying, cross-cut the grid with a spacing of 2mm on the lacquer surface. The number of grids is 6×6, and the depth is drawn. The substrate is subject to correctness. When cutting, it is obvious that the crispness of the wood substrate is scratched.

Then, use a tape to stick the cut area and observe how many peeling and peeling coatings on the tape to determine the adhesion level of the two.

4, resistant to daily material erosion test

The application of wood lacquer is very wide. It can be seen in the living room, dining room, kitchen and bathroom. Once the tea is accidentally sprinkled on it, the white vinegar can't be processed, and the bad paint will soon crack or even peel off. Once you lose your 'protective cover', the life of wood products will soon end, and eventually escape the fate of being abandoned.

In order to test oily and watery which is more resistant to daily material erosion, the editor selected five of the most commonly used items in life - tap water, vinegar, tea, alcohol and baking soda for testing.

In the test, we took a test tube and dropped the following medium on the paint film: tap water (24h), vinegar (1h), tea at 70°C (1h), 50% alcohol (45min) and 50g/L baking soda ( 1h), wait until the specified time, wipe the corresponding liquid medium with a rag, and then dry it with dry gauze; completely dry and let stand for 1h, observe with the naked eye whether the surface of the wood paint is discolored and other abnormalities.

After the test, according to the test data (as shown in the following table), in the varnish and paint test, the water-based and oil-based test areas passed the test smoothly, and no obvious abnormal changes were observed by the naked eye, indicating that Dulux water-based and oil-based woodware Paints have relatively good resistance to daily material erosion.

5, yellowing resistance test

Everyone has wood furniture or wood products in the house. Many of them are 'lucky' for a long time. For example, the bedside table near the window, the wooden sofa next to the floor glass, etc., although intimate contact with the sun, although not necessarily Bad things, but for a long time, wooden furniture can easily be made into a 'little yellow man'. Therefore, whether the wood paint on the outer layer of the furniture has excellent yellowing resistance, which will seriously affect the aesthetics and practicality. .

Five, environmental performance

Finally, what we have to do is the environmental performance that everyone cares about most. This is also the most concerned point for many consumers when choosing a coating. In general, waterborne wood lacquer is made of water as a thinner, and water itself is a very safe raw material. It is non-toxic and harmless, thus ensuring the safety of water-based paint. I believe this is recognized by everyone. The organic solvent in oil paint has certain harmfulness, and it is easy to release benzene, free TDI and other harmful substances. During use, volatile substances are released and irritating odors are emitted, which is harmful to the respiratory system of the human body.

Among the two types of test products we selected this time, although Dulux wood-based oil-based paint contains only ultra-low free TDI, in terms of environmental protection, it is far less than Duluxi's breathable water-based paint series. Bamboo charcoal can absorb formaldehyde, double effect. In addition to the double protection of aldehyde technology, not only the primer can absorb formaldehyde in the sheet, but also the topcoat can absorb formaldehyde in the air. The formula of pure taste is truly safe and environmentally friendly. The anti-benzene technology can further purify the air and truly realize the inside out. Net taste safety.

Is it really so powerful? Water and oil are the real 'environmental experts'? We can't rely on real data to convince you that there are pictures and truth! In order to get more realistic and objective experimental results, For the most valuable purchase reference, we sent the water and oil related test samples of this evaluation to the internationally recognized testing organization, SGS, a world-leading organization for inspection, verification, testing and certification. They do a more comprehensive and professional test on the environmental performance of water and oil. The test results, we immediately announced.

(1) Oil test results

Reference limit: According to GB18581-2009 The limit of harmful substances in oily wood coatings is as follows:

(2) Water-based test results

According to GB 24410-2009—Interior Decoration Materials The requirements for hazardous substances in waterborne wood coatings are as follows:

After receiving the final electronic test report from SGS, the conclusions in the report show the oil test results and the volatile organic compound (VOC) content, benzene content, toluene, xylene, ethylbenzene content, free diisocyanate in GB 18581-2009. (2,4-TDI, 2,6-TDI and HDI) The sum of the content, the content of halogenated hydrocarbons and the content of soluble heavy metals are consistent; and the waterborne wood lacquer also meets the national standard in all tests.

Although the test results show that there are no harmful substances in the water and oil properties, you can use them with confidence. However, when we summarize the report data and mark the detected substances in the oily and waterborne wood lacquer as green, the test results are clear at a glance— - Water-based paint leads the way in environmental protection.

First, only one substance was detected for the waterborne wood lacquer in the hazardous materials, and seven substances were detected in the oily wood lacquer. Although the contents of the seven substances are all within the safe range, the number is much higher than that of the water lacquer. Water-based paint varnish, the volatile organic compounds detected by the paint are 168g/L and 179g/L, respectively. Both test values ​​are far lower than the 300g/L water-based paint national standard; while the oil-based varnish, paint is in The results in the same project are 560g / L and 516g / L, although there is no national standard of oil paint 670g / L, but compared with water-based paint, it is inferior.

That is to say, in terms of environmental protection, water-based paint is definitely better than oil-based paint. Water-based paint uses water as a thinner to win the starting line, which can create a safer and more environmentally friendly home environment.

Six, evaluation summary