May I ask if MDF contains formaldehyde, which is not environmentally friendly, right?

It mainly depends on whether the glue used in the MDF is environmentally friendly, if the glue is not environmentally friendly, the MDF is definitely not environmentally friendly, even if it is well sealed, it will be emitted after a long time. After the house is renovated, it will continue to emit harmful gases indoors, and the best way is to ventilate frequently and raise some green plants that can absorb formaldehyde. You can raise some yew indoors, it is the best plant to purify the air, can effectively and permanently absorb formaldehyde and other harmful gases.

Hope mine can help you!

MDF, also known as fiberboard, is made of wood, arboriculture and other objects soaked in water by hot grinding, paving, and hot pressing, and is made of wood fiber or other plant fibers as raw materials, and applied urea-formaldehyde resin or other applicable adhesives. Ding Tiejun said that due to the addition of a large amount of urea-formaldehyde resin and adhesive in the processing process, the formaldehyde content of MDF is significantly higher than that of other boards such as blockboard, and detecting formaldehyde emission is one of the main tasks to be done in the selection of MDF. According to Mr. Ding, MDF is divided into E1 and E2 according to formaldehyde emissions, and under normal circumstances, most of the MDF on the market is E2 and less E1.

On the product inspection report, if it is found that the formaldehyde emission exceeds 30mg 100g, it will be regarded as unqualified.

Different MDF boards have different functions.

There are many kinds of MDF, how can ordinary consumers distinguish them? Mr. Ding said: "Since it is called MDF, so the type and density of the board must have a significant relationship, under normal circumstances, MDF is divided into hard fiberboard, high-density fiberboard, medium-density fiberboard and soft fiberboard according to the different densities, due to the different properties and raw material types, manufacturing processes, there are great differences in the types of various MDF.

Normally, the density of hard fiberboard is more than cubic centimeters, often one side of light; MDF has a density of grams of cubic centimeters, which is widely used in industries such as construction and furniture production, and can also be used as a packaging material; The density of soft fiberboard is below gram cubic centimeters, and it has good sound absorption and thermal insulation properties, and is mainly used in sound-absorbing structures of high-end buildings (such as theaters, etc.). ”

Look and hear to distinguish between good and bad.

Professionals like you are easy to solve, and you can see the worst of MDF through the test report, but if you are an ordinary person who can't read the test report, how can you distinguish the quality of MDF? "The easiest way is to distinguish from the weight, the MDF sold on the market now, the common specifications are 1220 2440mm and 1525 2440mm, the general thickness is between 20-25mm, under normal circumstances, the same type of MDF, the heavier the weight, the higher the quality of the plate. In addition to weighing, Mr. Ding also told two other ways to distinguish the quality of MDF, one is to look at the surface, usually a good MDF thickness is uniform, the board surface is flat and smooth, there are no stains, water stains, sticky marks, and the surrounding board surface is fine, strong, and no burrs; Another way is to listen to the sound by tapping the surface of the board with your hand, the uniform MDF quality is better and the sound is crisp and pleasant, while if the sound is muffled, the problem of loose glue may have occurred.

1.Activated carbon adsorption method.

Activated carbon to remove formaldehyde is a relatively cheap and practical method, characterized by physical absorption.

Attached, the adsorption is thorough, and it is not easy to cause secondary pollution. The physical effect of activated carbon is deodorization and detoxification.

There are no chemical additives and no effect on the human body. Put two to three dishes in each room, 72 small.

It can basically eliminate indoor odors. Moderate to low.

Contamination can be selected by this method, or this method can be used in combination with other herbal removal methods.

Better governance. It is that activated carbon is easy to saturate, and nano live ore is now used.

To replace it, the ore naturally has a good adsorption effect, and the nanopore size is greatly increased.

2.Formaldehyde is removed by ventilation method.

Through the circulation of indoor air, the content of harmful substances in indoor air can be reduced, thereby reducing the harm of such substances to the human body. In winter, people often close doors and windows, indoor and outdoor air can not circulate, not only the content of formaldehyde in indoor air will increase, radon.

It will also continue to accumulate and even reach a very high level. Concentration.

MDF has a high formaldehyde content.

The amount of formaldehyde glue contained in each cubic meter of MDF is generally 400-500 catties, which is the board with the highest formaldehyde content among all boards, so the high formaldehyde content of MDF is mainly due to the large amount of formaldehyde-containing glue used.

Of course, not all MDF formaldehyde content is the same, according to the national standard, MDF can be divided into E0 grade, E1 grade, E2 grade according to the amount of free formaldehyde content. The formaldehyde emission of E2 grade is 5mg L, and the formaldehyde emission of E1 grade is , which can be directly used for interior decoration, and the formaldehyde emission of E0 grade is . When purchasing MDF, consumers should try to buy products with low formaldehyde emissions, which are safer.

Since 1888, Germany first realized the industrial production of formaldehyde, and the production methods of formaldehyde have appeared according to the different raw materials: non-catalytic oxidation with liquefied petroleum gas as raw material, dimethyl ether oxidation, methane oxidation, and methanol air oxidation.

In 1923, after the German BASF company realized the large-scale production of methanol from syngas, the large-scale production of industrial formaldehyde had a good raw material base, and the methanol air oxidation method became the most commonly used method for the production of industrial formaldehyde.

As of 2010, more than 90% of the formaldehyde produced in industry is made from methanol as raw material, using methanol air oxidation method. Methanol air oxidation method is divided into methanol excess oxidation method, air excess oxidation method, later, in order to prepare high concentration formaldehyde and improve the comprehensive utilization efficiency of energy, and successively developed tail gas circulation method, formaldehyde oxidation method, etc.

MDF has a high formaldehyde content.

The volatilization period of formaldehyde is 3 to 15 years, due to the high formaldehyde content, the formaldehyde volatilization period of the dense board must be greater than 5 years, that is, at least 5 years, and the amount of formaldehyde released by the MDF may gradually decrease. However, due to the substrate limitations of the plate itself, this possibility is slim. Therefore, after the MDF has been used, it is completely wrong to think that the formaldehyde content has not been high.

In fact, MDF has been classified due to the high contamination properties of its materials. E2 MDF cannot be used directly in the renovation process. Free formaldehyde emissions are less than or equal to 5 milligrams per square meter.

E1 MDF can be used directly for decoration, and its formaldehyde content is less than or equal to milligrams per cubic meter. E0 is the best MDF, and the formaldehyde emission is less than or equal to milligrams per cubic meter.

MDF

MDF is a board made of wood fiber or other plant fibers as raw materials, prepared by fibers, applied with synthetic resin, and pressed under the conditions of heating and pressurization. According to its density, it can be divided into high-density fiberboard, medium-close fiberboard and low-density fiberboard. The density of MDF fiberboard ranges from 650 kg per cubic meter to kilogram per cubic meter.

Due to its uniform structure, fine material, stable performance, impact resistance, and easy processing, MDF is widely used in domestic furniture, decoration, musical instruments and packaging.

There must be formaldehyde in the MDF of the building. It is also divided into high density, medium density, and low density. According to the national standard, MDF can be divided into E0, E1 and E2 according to the amount of free formaldehyde content.

The formaldehyde emission of E2 grade is 5mg L; The formaldehyde emission of E1 grade is 1 5mg L, which can be directly used for interior decoration; The formaldehyde emission of grade E0 is 0 5mg l.

There is formaldehyde in MDF, which mainly depends on the process standards adopted by the manufacturer and whether it is implemented in accordance with national policies. In today's real economic situation, manufacturers' profits are relatively thin, and if they want to survive and obtain better returns, they must discount quality. The quality is directly proportional to the first, so if you buy a large factory or a national standard, you should also pay attention not to be cheap.

It depends on which MDF is produced.

The main ** of formaldehyde in MDF is the glue used for gluing. The MDF of well-known foreign manufacturers all use melamine glue and do not contain formaldehyde. The informal small factories in China use aldehyde glue, and the formaldehyde is scary (the ** of melamine glue is ten times that of aldehyde glue).

Look at the quality of your MDF, I only know that the content of the real Luoshui River is lower.

As long as the MDF meets the standard, it is an environmentally friendly material, and a good MDF is a material for making high-end home furnishings.

As long as you look for the brand when you buy it, and look at the VOC values of each item, you don't have to worry about this problem if it is not a fake or shoddy product.

It's worth noting that there are no good and cheap building materials, so... Don't buy too cheap. It's experience.

Air pollution in the new house is a troublesome thing, how to remove formaldehyde is even more troublesome, what is the way to remove formaldehyde in the newly renovated house, and the simple way to remove formaldehyde in the new house. Ventilation, plant aldehyde removal, these traditional folk methods are affected by various factors, and the effect is usually not guaranteed. There is a Bamboo Sea Goddess on Taobao, their active silicon does not need to be taken out often to bask in the sun, this is particularly important, I use this thing when decorating my home, and the effect is very good.

Indoor formaldehyde will be continuously released, and the effect will be better if it can be used purely by reactive silicon and diatoms. It can also be used in combination with active silicon for the best effect. It is more effective than a single plant or activated charcoal, and the long-term effect is much better than the short-term effect.

There is also the need to buy activated silicon, not the kind of activated carbon that is made in bulk, because activated silicon is a natural ore, and the adsorption rate is 12-16 times that of activated carbon. It is recommended to use it with green plants or open windows for ventilation. In this way, the adsorption effect is also better, and the activated silicon can continue to be used after being exposed to the sun and ventilated.

The panels used in high-panel furniture are made with a large amount of glue as an adhesive, and formaldehyde mainly comes from these adhesives. The so-called E0 level is not to say that there is no formaldehyde release, but to formaldehyde release, so it can only be said that this board is very close to the environmental protection of solid wood. Although the formaldehyde content is very small, it is also necessary to pay attention to the quantity, and if it is used in a large amount in a certain space, the formaldehyde emission will still exceed the environmental protection standard.

Four types of wood planks with a high formaldehyde content.

1. Solid wood particle board.

Also known as MDF, it is a type of particleboard. The middle part is long wood fiber, and the solid wood particle board needs to be bonded by adding adhesive and glue in the production process, and is made under the action of heat and pressure.

The amount of viscose used in MDF is generally 400-500 kilograms, and the amount of viscose is high, so the formaldehyde content contained in it is also high.

2. Blockboard.

Blockboard is composed of multiple small pieces of wood, of course, it also needs glue to bond, but compared with solid wood particle board, the amount of glue is still a lot less.

Blockboard also needs to be veneered in the later stage to process into some veneer wood board materials, because a large amount of glue is used in the intermediate bonding, so there will be a certain amount of formaldehyde release, polluting the indoor air.

3. Veneer.

It can also be called veneer, and in the production process of the board inside the veneer, a large amount of glue is also added, but a layer of skin is pasted on the outside, which looks more beautiful and textured.

There is also formaldehyde pollution in the veneer, and we still need to pay attention to it when purchasing.

4. Multi-layer fir finger jointing board.

This kind of board is composed of three layers of wood boards, but in the production process, the middle of the three layers of wood also needs to be bonded by adhesive, so there will be a certain amount of formaldehyde release.

Multi-layer fir finger jointing board "finger seam" is exposed to the air, so it is easier to volatilize formaldehyde, in home decoration, the use of this multi-layer fir finger joint board, will also cause a certain amount of pollution to the indoor air.

MDF contains formaldehyde, because the production process requires glue, and the glue itself contains formaldehyde, but the formaldehyde content is not low. But now there are some brands on the market that can make MDF with slightly lower formaldehyde content. It depends on the brand.

MDF formaldehyde content is the highest.

MDF "particle board" plywood".Solid wood boards

The content is very high, and if you live in such an environment for a month, you may get cancer.

The formaldehyde content of MDF is relatively high, because MDF is mainly made of glue, and the wood fiber material is made by heating and pressurization, and the larger the amount of glue, the higher the formaldehyde content, so not all MDF formaldehyde content is the same.

It's quite high, so we still have to be on guard against formaldehyde.