Quantitative Analysis of Formaldehyde Release from Fingerboard

A considerable number of people who need to purchase furniture often hear the saying "finger boards are made of broken wood glued together with a lot of glue, which is not environmentally friendly", but in fact, they are not. Let me calculate the formaldehyde content of the same volume (one cubic meter) of white oak logs, standard straight panel, and finger board, and use numbers to crush rumors.

One cubic meter of white oak logs has an air dried weight of about 770kg, and the formaldehyde content of the wood itself is 4mg/100g, which means that each cubic meter of white oak without any cementation contains 30.8g of formaldehyde., If it is a cubic meter straight panel, according to the standard panel size of 6cm wide, the adhesive application area is 16.7 square meters. The upper limit of the general woodworking adhesive amount is 250g/square meter, and a total of 4.175kg of adhesive is required. The high-end woodworking adhesive represented by Taiba has not been detected for formaldehyde, let alone. The domestic adhesive of Henkel Baide meets the ten ring certification, and the formaldehyde standard is<0.1g/kg. According to the upper limit, the formaldehyde used for straight panel adhesive tape is 0.4175g, and the formaldehyde of the wood itself is 30.8g, Total 31.275g. If it is a one cubic meter finger joint board, according to the specifications of 6cm horizontal splicing and 15cm finger joint, the adhesive application area is 23.4 square meters. Similarly, when using domestic adhesive such as Henkel Baide, the upper limit of formaldehyde using adhesive tape is 0.585g, and the wood itself is 30.8g, totaling 31.385g.

(31.385-31.275)/31.385=0.0035

That is to say, even if domestic woodworking adhesive is used, the formaldehyde content of the finger joint board is only three thousandths higher than that of the straight joint board. For a typical 3mX3mX2.6m small bedroom, a four door wardrobe, a double bed, a Commode, and a desk, the wood consumption will not exceed 1m ³， The difference in formaldehyde content between all using finger joint boards and all using straight joint boards will not exceed 0.11g. Formaldehyde will be released within 3 to 15 years, and we will take the fastest release period of 3 years, with a release rate of no more than 0.05mg within 12 hours. That is to say, after sufficient ventilation and being sealed for 12 hours, the difference in formaldehyde concentration between finger board and straight panel furniture in this space does not exceed 0.0021mg/m ³， The national standard used as a reference is 0.1mg/m ³。 Simply put, the difference between finger board and straight board is mainly in terms of appearance and structural strength, and there is almost no practical difference in environmental protection.

PS1: The formaldehyde content and adhesive amount in the article are taken according to the highest standards in extreme situations, and in fact, they will be even lower.

PS2: When calculating the bonding area of the finger board, for the convenience of calculation, the cross-sectional area was directly used, which lost accuracy but did not affect the conclusion.

PS3: The formaldehyde content in wood is obtained by extraction method, and only a small portion is released into the air. However, this part of the numerical value does not affect the difference between the straight joint plate and the finger joint plate, nor does it affect the conclusion.