In recent years, wooden floors with comfortable feet and decorative features have become the choice of more and more people. However, after running the building materials market several times, it will be “smooth and fascinating” in many types of flooring and brands: Which floor is more suitable for so many floors? What are the main aspects of choosing a floor? What are the quality problems that are likely to occur with different types of floors?
In October 2018, “Consumer Report” compiled and analyzed the results of floor inspections of government agencies such as quality inspection and industry and commerce in the country from 2017 to 2018. Floor types include solid wood flooring, engineered wood flooring, impregnated paper laminated wood flooring (reinforced flooring) and bamboo flooring. The sampling results showed that a total of 114 batches of the floor were unqualified, and the main unqualified items included static bending strength, surface wear resistance, and formaldehyde emission. It is worth noting that a total of 33 batches of floor surface formaldehyde emission exceeded the standard, accounting for nearly 30% of unqualified batches, including famous brands such as Shengxiang and Ou Pai.
A wide variety of wooden floors
A wide variety of wooden floors, generally solid wood flooring, engineered wood flooring, impregnated paper laminated wood flooring (reinforced flooring), bamboo flooring , cork flooring, etc. The so-called solid wood flooring is the floor directly processed with solid wood; while the solid wood composite flooring is made of solid wood imposition or veneer (including remanufactured decorative veneer) as the panel, with solid wood panels, veneers or plywood as the core layer or The bottom layer, which is laminated by different combinations, generally has two, three or more layers of solid wood composite flooring.
▲Solid wood flooring
In the building materials market, laminate flooring is also very common. Laminate flooring is also called impregnated paper laminated wood flooring. As the name suggests, this is a surface of a substrate that is impregnated with one or more layers of special paper, and is coated on a substrate such as particleboard or high-density fiberboard. Layer, front plus wear layer, hot pressed, molded floor. Laminate flooring probably grows like this:
▲Reinforced wood flooring
In recent years, with the increase in spending power, it is known as the “pyramid tip” of cork flooring in the floor. It has also become popular. The cork floor is made of a bark of cork oak, which is mainly grown on the Mediterranean coast, and is crushed and pressed. The style can refer to the cork board that we usually insert the sticky note paper, or the cork in the red wine bottle. The touch is more flexible, moisture-proof and soundproof, and the price is relatively expensive. Relatively speaking, the bamboo flooring is much better understood, that is, the floor pressed with bamboo and wood composite. Among the many types of flooring mentioned above, laminate flooring is very popular because of its affordable price and the texture of wooden flooring. Solid wood composite flooring is also the mainstream choice in the market because of its durability, resistance to deformation and crack resistance. The more mainstream is solid wood flooring, although the price is more expensive, but natural, environmentally friendly, comfortable, there are many fans. .
“Consumer Report” suggests that consumers can reasonably choose flooring products according to their own environment and economic situation.
41nd batch of wood flooring, etc. The static bending strength is unqualified
Wood-made wood-based panels may bend or even break after being subjected to a certain pressure, and it is under stress. The pressure strength that can be withstood after the break, the so-called static bending strength. Static bending strength is an important technical indicator to measure the bearing capacity of laminate flooring and solid wood composite flooring. However, the standard requirements of the two are slightly different. “GBT18102-2007 impregnated paper laminated wood floor”, that is, the static bending strength of the strengthened floor is ≥35.0MPa, and the “GBT18103-2013 solid wood composite floor” requires static bending strength ≥30MPa. . That is to say, the static bending strength of the reinforced floor is higher and the squeezing resistance is relatively stronger. In the 114 batches of unqualified flooring finished in this publication, the static bending strength failed to reach 41 batches, which is the unqualified item involving the largest batch. Well-known brands including David (production date/lot number: 10081604) and icon (production date/lot number: 2016/10/6, 2017/3/12) are on the list. If the static bending strength is not up to standard, the structure may be loose, deformed, etc. during use, which may affect the service life. When consumers choose the floor, they can ask the merchant for the sample test report, understand the static bending strength of the product in the report, and try to choose the floor with high static strength value.
The total surface of 36 batches of floor coverings such as Quanle and Baisenyuan is not qualified.
The paved floor is neat and beautiful, but it will take a long time to be used. It is prone to wear marks and scratches, which depends on the wear resistance of the surface of the floor. Taking the laminate flooring as an example, a layer of aluminum oxide wear layer is added to the surface layer to ensure that the floor can resist a certain degree of scoring, cigarette burning, furniture friction and other daily wear and tear. Therefore, the surface wear resistance of the floor is qualified, which affects its service life and appearance. The surface wear resistance of the floor can be judged by its wear resistance. For example, take a laminate floor and polish it on the turntable covered with sandpaper. After every 500 rpm, the sandpaper is replaced until the number of revolutions of the floor is a certain amount of wear. “GBT18102-2007 impregnated paper laminated wood floor” has different regulations on the surface wear resistance of different grades of floor. For example, when the number of revolutions of local board is ≥9000 rpm, it is commercial grade floor; while the standard of household grade I is ≥ 6000 rpm; household class II is ≥ 4000 rpm. Of the 114 batches of unqualified flooring finished in this publication, as many as 36 batches of flooring have problems with surface wear resistance, and these unqualified products are laminate flooring, such as Quanle (production date/batch number: 2016/ 12/23), Boss (production date/batch number: 2016/4/27), Baisen source (production date/batch number: 2017/3/15), etc.
European and other 33 batches of products exceed the standard
In the decoration process, the problem of formaldehyde has always been one of the most worrying things for the owners. And the wooden floor is justIt is also an important source of formaldehyde release. Compared with solid wood flooring, laminate flooring and parquet are more prone to excessive formaldehyde. This is because both floors use a “layered bonding” structure, which uses a large amount of adhesives, such as urea-formaldehyde glue, phenolic glue, etc., which contain a large amount of free formaldehyde. Slow and sustained release indoors affects human health. The sampling data of the Industrial and Commercial and Quality Supervision Bureaus across the country from 2017 to 2018 also verified this point. The laminate flooring is the most important floor category for formaldehyde emission. Among the 33 batches of floorboards with unqualified formaldehyde emission, 32 batches were impregnated paper laminated wood flooring, that is, laminate flooring; another batch of unqualified products was solid wood composite flooring. Among the brands on the list, there are many well-known brands such as David (production date/batch number: 2912160701) and Europa (production date/batch number: 2015/2/3).
When consumers purchase laminate flooring or parquet, they can pay more attention to the formaldehyde emission level of the product. At present, China’s “GBT18102-2007 impregnated paper laminated wood floor” will be divided into E1 grade and E0 grade. The E1 level requires formaldehyde emission of ≤1.5mg/L, which is basically no threat to the human body; while the E0 environmental protection standard requires floor formaldehyde emission ≤0.5mg/L. If you are concerned about formaldehyde, consumers can try to buy E0 floor products and keep indoor ventilation during use.
Shopping floor tips
When purchasing, you can ask the merchant to provide third-party test report of the product, understand the surface wear resistance, formaldehyde release level, static bending strength, Physical and chemical performance indicators of various aspects such as immersion peeling and water absorption thickness expansion ratio. Pay attention to whether the appearance of the wooden floor is uniform in color, clear in pattern, cracked, smudged and damaged. The product should be tight and tight without pungent smell. Pay attention to the processing accuracy of the floor. It is advisable to try 5~10 floors to see the size of the gap and the height difference, and whether the floor is smooth and smooth, and whether the groove is tight. For example, if the side and end splicing points are smaller from the seam, the hand touch is not high or low, and the processing precision is excellent. It is excellent within 0.10mm, otherwise there is a defect in accuracy.
(provided by Shenyang Building Materials Network) <
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