Formaldehyde is the main component of various adhesives in building materials, decoration, decoration and furniture. There is no formaldehyde involved in the reaction, or degradation occurs later, and it is separated from the binder to become "free formaldehyde." "" Free formaldehyde volatilizes into the air as the temperature rises, forming formaldehyde pollution in the indoor air.
According to the length of the free formaldehyde evaporation cycle in various adhesives, these adhesive-containing decorative materials, decorative materials, and furniture articles can be classified into "short-term formaldehyde release sources" and "long-term formaldehyde release sources." The release cycle of free formaldehyde in wall paint, wallpaper, putty, paint, curtains, mattresses, etc. is short, generally from 2 weeks to 6 months, and belongs to the "short-term formaldehyde release source". When production of wood-based panels and proprietary urea-formaldehyde resin, formaldehyde release cycle often as long as 3-15 years, are "long-term source of formaldehyde release", is the only long-term source of indoor formaldehyde pollution release, so in the purchase of furniture and decoration plate, Consider the release of formaldehyde.
In the face of the exquisite plates on the market, how should we choose decoration panels with low pollution index?
Pollution Index First Place: MDF
Including indoor fiber pollution, various fiberboards, particleboards, etc. used in the manufacture of furniture, also known as particle board, is the cutting of wood board processing residues, small diameter wood, wood chips, etc. into pieces of certain specifications, after drying, mixed with rubber , a hardener, a water repellent, etc., a wood-based panel pressed at a certain temperature and pressure. Some bamboo, straw, bagasse and other fibers are also used. This kind of wood-based panel is called melamine board after using melamine veneer. According to estimates, the amount of formaldehyde-containing urea-formaldehyde resin adhesive required to produce a density board per cubic meter is generally 200-250kg .
Pollution Index Second Place: Blockboard
Generally called the large core board. It is an artificial board made of urea-formaldehyde resin adhesive, which is made by bonding the upper and lower plywood and the middle small piece of wood. The middle is made of natural wood strips, and the two sides are glued with very thin veneer. The core board is one of the most important materials in the decoration. Blockboard is a kind of decoration and decoration materials used in the interior decoration of urban and rural residents in China. It can be used as furniture, wooden doors and door and window covers, heating hoods and curtain boxes. Its waterproof and moisture resistance is better than particleboard and MDF. However, due to the use of urea-formaldehyde resin adhesives, the indoor environment caused by decoration and decoration caused potential formaldehyde pollution.
Pollution Index Third Place: Plywood
It is a wood-based panel which is cut into large sheets by steaming and softening along the annual ring, and dried, finished, glued, assembled, hot pressed and sawed. The number of layers of plywood chips should be an odd number, generally 3 to 13 layers, and the fibers of adjacent wood chips should be made perpendicular to each other when gluing. Plywood is mainly used in the decoration and furniture manufacturing with solid wood materials, MDF, blockboard and finger joints. The main production process is a wood-based panel in which three, five, seven and nine layers of wood sheets are bonded with a urea-formaldehyde resin adhesive.
Fourth place in pollution index: multi-layer finger joint board
It mainly includes various multi-layer solid wood finger joint plates produced by using urea-formaldehyde resin adhesive. Generally, the multi-layer finger joint plate has three layers, so that there are two layers of adhesive applied in the middle of the three layers, but since the "finger joints" of the various finger joint plates are exposed in the air, the formaldehyde is more volatile.
The fifth place in the pollution index: various veneers, also called veneers, are called decorative veneer veneers.
It is a kind of surface material used for interior decoration or furniture manufacturing, which is made by cutting natural wood or technical wood into a certain thickness, adhering to the surface of plywood and then hot pressing. A wood-based panel used to decorate furniture surfaces with glue applied to thin-density boards and particle boards. Can not be used alone, can only be used on the blockboard, splint, fir fingerboard.
Pollution index sixth: solid wood finger joint board
Because it is made of single-layer solid wood material, it is also called single-layer solid wood finger joint board. The main production process of this kind of board is to cut all kinds of solid wood materials into small pieces and then deep-dry them and then open the small pieces, then apply urea-formaldehyde resin adhesive on the teeth and small pieces, and then squeeze Press fixed. Used in some solid wood furniture, as the lining board, board and partition of solid wood furniture, it is the main source of formaldehyde pollution in solid wood furniture.
7th pollution index: splint, also known as plywood
There are three plywoods, five plywoods, seven plywoods and nine plywoods, which are widely used before the appearance of blockboard and fir finger joints. Production process: As the name implies, it is a wood-based board that bonds three or four layers of thin sheets with glue ( rich in formaldehyde ) .
Pollution Index No. 8: Veneer (also known as veneer)
The production process is to stick the thin wood chips or paper with glue ( rich in formaldehyde ) on the thin-density board and the particle board to decorate the surface of the furniture. The veneer is made of a "three plywood + 30 wire veneer". It can not be used alone. It can only be used on the blockboard, splint and fir fingerboard.
Pollution index ninth: solid wood finger joint board
Solid wood finger joints are solid wood furniture substrates of 95 - 98% . In the eyes of many consumers, solid wood furniture is healthy and harmless. In fact, solid wood furniture and natural may not necessarily be equal. At present, the raw materials of solid wood furniture, some are two or more pieces of wood glued into veneers, and some are made of broken wood after bonding. This method of production will also involve the problem of using glue, and many of the glues are formaldehyde-containing, that is to say, there will be some solid wood furniture, although solid wood is used, but there is also a certain amount of formaldehyde release.
Pollution Index Tenth: Ecological Board
The ecological board and the core material are selected; the high-quality northeast poplar is used as the core board, and after 4 times of double-sided thick sanding, the flatness of the product reaches the standard of production furniture, the hardness of the core material is high, and the nail holding power is strong. The face material is selected; the high-strength wear-resistant ecological paper of domestic famous brand is used as the veneer paper, the environmental protection of the veneer paper is guaranteed, the color of the paper color is natural, beautiful, the pattern is realistic, the paper surface is strong, the wear is good, and the color is not faded.
The core board is high-quality; the core board adopts machine splicing and seamless, and the whole machine is dried. The moisture content of the board is stable, and the product is not easily deformed and does not crack. Environmental standards; the implementation of the country's highest environmental requirements, all products up to E0 and E1 standards.
Shenzhou home plate reminder:
When purchasing decorative panels, we should try our best to choose brand products that pass the national quality inspection. Consumers can also ask the seller to make a description of the wood and glue used in the furniture. In addition, when buying solid wood furniture, try to avoid too much spliced ​​furniture. Specific questions can be asked to the seller and the timber-related situation is written into the purchase contract as a condition for rights protection.
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